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CN111867941A - Packaging body - Google Patents

Packaging body Download PDF

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Publication number
CN111867941A
CN111867941A CN201980020284.1A CN201980020284A CN111867941A CN 111867941 A CN111867941 A CN 111867941A CN 201980020284 A CN201980020284 A CN 201980020284A CN 111867941 A CN111867941 A CN 111867941A
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CN
China
Prior art keywords
film
side film
package
opening
sheet
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201980020284.1A
Other languages
Chinese (zh)
Other versions
CN111867941B (en
Inventor
森田佐保
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2018061577A external-priority patent/JP7114979B2/en
Priority claimed from JP2018089128A external-priority patent/JP7135412B2/en
Priority claimed from JP2018111664A external-priority patent/JP7167494B2/en
Priority claimed from JP2018136847A external-priority patent/JP2020011768A/en
Priority claimed from JP2018154626A external-priority patent/JP2020029278A/en
Application filed by Toppan Printing Co Ltd filed Critical Toppan Printing Co Ltd
Publication of CN111867941A publication Critical patent/CN111867941A/en
Application granted granted Critical
Publication of CN111867941B publication Critical patent/CN111867941B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D33/00Details of, or accessories for, sacks or bags
    • B65D33/02Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65DCONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22Details
    • B65D77/30Opening or contents-removing devices added or incorporated during filling or closing of containers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Abstract

The package (1) has a 1 st side film, a 2 nd side film, and a base film. The package (1) is provided with an edge portion (20), a housing portion (30), and a shape-retaining member (40). The edge portion (20) includes an edge seal portion (21), a bottom seal portion (22), and a portion (23) to be sealed. The shape retaining member (40) includes a super-stretch sheet, and a 1 st sheet attached to the super-stretch sheet and at least either one of the 1 st side film and the 2 nd side film. The molecular orientation direction of the ultra-stretched sheet is along the width direction of the package (1). The melting point of the No. 1 sheet was lower than that of the ultra-drawn sheet.

Description

Packaging body
Technical Field
The present invention relates to a package.
Background
Conventionally, a package capable of containing contents such as food has been proposed. As such a package, for example, japanese patent application laid-open No. 2006-96388 (patent document 1) describes a standing pouch (standing pouch) that can stand up with contents filled therein.
Documents of the prior art
Patent document
Patent document 1: japanese laid-open patent publication No. 2006 and 96388
Disclosure of Invention
Problems to be solved by the invention
In the self-standing bag described in the above publication, an opening for taking out the contents is formed in the portion to be opened. Specifically, the opening is formed by cutting the upper portion of the self-standing bag along the opening slit. The opening is formed by a gap between the front surface film and the back surface film before the opening is formed. After the opening is formed, the gap between the front surface film and the back surface film becomes large, thereby widening the opening. Even in this case, the opening is narrowed again because the front film and the back film are intended to return to their original shapes. This makes it impossible to maintain the wide opening. Therefore, it is difficult to take out the contents from the opening.
The present invention has been made in view of the above problems, and an object thereof is to provide a package body capable of holding a wide opening state by a shape holding member.
Means for solving the problems
The package of the present invention has a 1 st side film, a 2 nd side film, and a base film. The 2 nd side film faces the 1 st side film. The base film is disposed between the 1 st side film and the 2 nd side film. The package body includes an edge portion, a housing portion, and a shape-retaining member. The edge portion is disposed at an edge between the 1 st side film and the 2 nd side film. The accommodating portion is surrounded by the edge portion. The shape retaining member is disposed between the 1 st side film and the 2 nd side film, and is attached to at least one of the 1 st side film and the 2 nd side film. The edge portion includes an edge sealing portion, a bottom sealing portion, and a predetermined sealing portion. The edge sealing part seals a part of the edge between the 1 st side film and the 2 nd side film. The bottom sealing portion seals each of the 1 st and 2 nd side films to the base film, respectively. The portion to be sealed allows the outside of the package to communicate with the housing portion without sealing the other portion of the edge between the 1 st side film and the 2 nd side film. At least either one of the 1 st side film and the 2 nd side film includes an opening scheduled portion for opening to communicate the outside of the package with the accommodating portion. The shape retaining member is disposed between the planned opening portion and the bottom seal portion, and includes: the packaging film includes a super-stretch sheet extending in a width direction intersecting a vertical direction of the package, and a 1 st sheet attached to the super-stretch sheet and at least either one of the 1 st side film and the 2 nd side film. The molecular orientation direction of the ultra-stretched sheet is along the width direction of the package. The melting point of the No. 1 sheet was lower than that of the ultra-drawn sheet.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the package of the present invention, the wide opening can be maintained by the shape-retaining member.
Brief description of the drawings
Fig. 1 is a front view schematically showing the configuration of a package according to embodiment 1 of the present invention.
FIG. 2 is a sectional view taken along line II-II of FIG. 1.
Fig. 3 is a perspective view schematically showing the configuration of a shape retaining member of a package according to embodiment 1 of the present invention.
Fig. 4 is a cross-sectional oblique view taken along line IV-IV of fig. 3.
FIG. 5 is a sectional view taken along line V-V of FIG. 1.
Fig. 6 is a perspective view schematically showing the structure of a package according to embodiment 1 of the present invention, and is a view showing a state in which contents are contained in a containing portion.
Fig. 7 is a perspective view schematically showing the structure of a package according to embodiment 1 of the present invention, and is a view showing a state in which a portion to be opened is opened.
Fig. 8 is a perspective view showing a state in which the opening of the package according to embodiment 1 of the present invention has been widened.
Fig. 9 is a sectional view schematically showing the structure of a package according to embodiment 2 of the present invention.
Fig. 10 is a perspective view schematically showing the structure of a package according to embodiment 2 of the present invention, and is a view showing a state in which contents are contained in a containing portion.
Fig. 11 is a perspective view schematically showing the structure of a package according to embodiment 2 of the present invention, and is a view showing a state in which a portion to be opened is opened.
Fig. 12 is a perspective view showing a state in which the opening of the package according to embodiment 2 of the present invention has been widened.
Fig. 13 is a front view schematically showing the structure of a package according to embodiment 3 of the present invention.
FIG. 14 is a cross-sectional view taken along line XIV-XIV of FIG. 13.
Fig. 15 is a front view schematically showing the structure of a package according to embodiment 4 of the present invention.
Fig. 16 is a perspective view schematically showing the configuration of a shape retaining member of a package according to embodiment 2-1 of the present invention.
FIG. 17 is a cross-sectional oblique view taken along line XVII-XVII of FIG. 16.
FIG. 18 is a front view showing a self-standing bag according to embodiment 3-1 of the present invention.
Fig. 19 is a perspective view of the self-standing bag according to embodiment 3-1 of the present invention, showing the vicinity of the opening in the unsealing step.
Fig. 20 is a perspective view showing a state after the self-supporting bag according to embodiment 3-1 of the present invention has been opened.
FIG. 21 is a front view showing an example of the embodiment in which the opening portion is larger than the bottom portion in the self-standing bag according to embodiment 3-1 of the present invention.
Fig. 22 is a perspective view showing a state after opening the pouch in an example of the embodiment in which the opening portion is larger than the bottom portion in the self-standing pouch according to embodiment 3-1 of the present invention.
Fig. 23 is a plan explanatory view schematically showing an embodiment of a bag with an opening holding member according to embodiment 4-1 of the present invention.
Fig. 24 is a sectional explanatory view schematically showing a section a-a' of fig. 23.
Fig. 25 is a perspective view showing a state where the bag with the opening holding member shown in fig. 23 is opened and the opening is opened.
Fig. 26 is a sectional explanatory view schematically showing an example of a section in the 2 nd embodiment of the bag with the opening holding member according to the embodiment 4-1 of the present invention.
Fig. 27 is a plan explanatory view schematically showing an example of embodiment 3 of the bag with an opening holding member according to embodiment 4-1 of the present invention.
Fig. 28 is a sectional explanatory view schematically showing a section B-B' of fig. 27.
Fig. 29 is a plan explanatory view schematically showing an example of the 4 th embodiment of the bag with an opening holding member according to the embodiment 4-1 of the present invention.
Fig. 30 is a cross-sectional explanatory view schematically showing a laminated structure for one example of a laminated body and a shape retaining member used in the bag with an opening retaining member according to embodiment 4-1 of the present invention.
Fig. 31 is a schematic plan view showing a self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention for explaining one embodiment.
Fig. 32 is a schematic perspective view of fig. 32 for explaining the opened and opened state of the self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention.
Fig. 33 is a schematic perspective view illustrating an evaluation sample of an example of the self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention.
Fig. 34 is a partially schematic cross-sectional view illustrating example 5-1 of the self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention.
Fig. 35 is a partially schematic cross-sectional view illustrating example 5-2 of the self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention.
Fig. 36 is a schematic partial cross-sectional view illustrating a self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention, according to comparative example 5-1.
Fig. 37 is a schematic partial cross-sectional view illustrating a self-supporting bag with an opening shape retaining function according to embodiment 5-1 of the present invention in comparative example 5-2.
Detailed Description
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference numerals and description thereof will not be repeated unless otherwise specified. In addition, the regions where dots are displayed in the figures indicate portions that have been sealed. In the embodiment of the present invention, "sealing" means bonding 2 films to each other and hermetically sealing the 2 films to each other.
(embodiment mode 1)
The structure of the package 1 according to embodiment 1 of the present invention will be described with reference to fig. 1 and 2. Fig. 1 and 2 show a state before the content 10 (see fig. 6) is contained in the package 1. The package 1 according to the present embodiment includes a 1 st side film 11, a 2 nd side film 12, and a base film 13. For example, each of the 1 st side film 11 and the 2 nd side film 12 may have a rectangular shape when viewed from a direction in which the 1 st side film 11 and the 2 nd side film 12 overlap each other. The 2 nd side film 12 is configured to face the 1 st side film 11. In addition, the 1 st side film 11 and the 2 nd side film 12 may each have the same size.
The base film 13 is disposed between the 1 st side film 11 and the 2 nd side film 12. The base film 13 is inserted between the 1 st side film 11 and the 2 nd side film 12 from the lower end of the package 1 in the vertical direction (vertical direction) HD of the package 1. The base film 13 is inserted between the 1 st side film 11 and the 2 nd side film 12 from a folding line in a folded state. The package 1 is configured to be able to stand up with the bottom film 13 as a bottom. That is, the package 1 is a self-standing bag.
The package 1 includes a rim 20, a container 30, and a shape retaining member 40. The edge portion 20 is disposed at the edge of the 1 st side film 11 and the 2 nd side film 12 with respect to each other. The edge portion 20 includes an edge seal portion 21, a bottom seal portion 22, and a portion to be sealed 23. The edge sealing portion 21 seals a part of the edge between the 1 st side film 11 and the 2 nd side film 12. In the present embodiment, the edge seal portions 21 are disposed at both side ends of the package 1 in the width direction (left-right direction) WD of the package 1.
The bottom sealing portion 22 seals each of the 1 st side film 11 and the 2 nd side film 12 and the base film 13. The bottom seal portion 22 is disposed at the lower end of the package 1 in the vertical direction HD of the package 1. The portion to be sealed 23 allows the outside of the package 1 to communicate with the housing portion 30 without sealing the other portions of the edges of the 1 st side film 11 and the 2 nd side film 12. That is, in a state before the content 10 is contained in the package 1, a part of the edges of the 1 st side film 11 and the 2 nd side film 12 to each other is sealed, and the other part is not sealed.
When the content 10 is accommodated in the accommodating portion 30 from the outside of the package 1, the portion to be sealed 23 is used to pass the content 10. The portion to be sealed 23 is not sealed in a state before the content 10 is contained in the containing portion 30. After the content 10 is accommodated in the accommodating portion 30 from the outside of the package 1 via the portion to be sealed 23, the portion to be sealed 23 is sealed. In the present embodiment, the portion to be sealed 23 is provided at the upper end of the package 1 in the vertical direction HD of the package 1. The position of the portion to be sealed 23 is not limited to the upper end of the package 1. For example, the portions to be sealed 23 may be provided at the side ends of the package 1 in the width direction WD of the package 1.
In a state before the content 10 is accommodated in the accommodating portion 30, the edge portion 20 of the package 1 has: the edge seal portion 21 and the bottom seal portion 22 which are the sealed regions, and the portion to be sealed 23 which is the region not sealed. That is, in the state before the content 10 is contained in the containing portion 30, the edge portion 20 of the package 1 is sealed except for the portion to be sealed 23. Specifically, the edge portion 20 of the package 1 may be sealed by, for example, thermal fusion.
The 1 st side film 11, the 2 nd side film 12, and the base film 13 may each be composed of a laminate. Specifically, each of the 1 st side film 11, the 2 nd side film 12, and the base film 13 may have a 3-layer structure obtained by, for example, overlapping layers of Linear Low Density Polyethylene (LLDPE), Nylon (NY), and transparent vapor-deposited polyethylene terephthalate (PET) from the side that has been sealed. In addition, the thickness of each of these layers may be (for example): linear Low Density Polyethylene (LLDPE) 100 μm, Nylon (NY) 25 μm, transparent evaporated polyethylene terephthalate (PET) 12 μm.
The container 30 is configured to contain the content 10. The contents 10 may be, for example, fried rice, japanese style food, and the like. The receiving portion 30 is surrounded by the edge portion 20. Specifically, when the package 1 is viewed from the 1 st side film 11 side, the accommodating portion 30 is surrounded by the edge portion 20 in a direction from the 1 st side film 11 toward the 2 nd side film 12. That is, the accommodating portion 30 is surrounded by the edge portion 20 in a plan view (front view).
The package 1 has a portion to be opened 50 as an unsealing means. Specifically, at least either one of the 1 st side film 11 and the 2 nd side film 12 includes an opening scheduled portion 50 for opening to communicate the outside of the package 1 with the accommodating portion 30. The portion to be opened 50 is used to take out the contents after the portion to be opened 50 is opened. The portion to be opened 50 is not opened in a state before the content 10 is contained in the package 1. The portion to be opened 50 is disposed between the shape retaining member 40 and the portion to be sealed 23 in the vertical direction HD of the package 1. The portions to be opened 50 are arranged between the side ends on both sides in the width direction WD of the package 1. In the width direction WD of the package 1, cutouts CU are provided at side ends of both sides to sandwich the opening scheduled portion 50.
The cuts CU are provided at both ends of the package 1 in the width direction WD. That is, the cuts CU are provided at one end 1a and the other end 1b in the width direction WD of the package 1, respectively. The cuts CU may be arranged at the same height position at the one end 1a and the other end 1b in the vertical direction HD of the package 1. Both ends of the cut CU in the width direction WD of the package 1 linearly extend toward the opposite ends, respectively. The cut CU may be provided only at one of both ends of the package 1 in the width direction WD.
The cut CU is disposed between the bottom seal portion 22 and the portion to be sealed 23 in the vertical direction HD of the package 1. In a state where the portion to be sealed 23 is sealed, the 1 st side film 11 and the 2 nd side film 12 are cut in the width direction WD of the package 1 from the notch CU, thereby opening the package 1.
The planned opening portion 50 is disposed at the upper end of the package 1 after the 1 st side film 11 and the 2 nd side film 12 are cut in the width direction WD of the package 1 from the notch CU. That is, the opening is disposed between one end E1 and the other end E2 of the package 1 in the vertical direction HD of the package 1.
The shape retaining member 40 is disposed between the 1 st side film 11 and the 2 nd side film 12. The shape retaining member 40 is exposed to the housing portion 30. That is, the shape retaining member 40 is not covered by the laminate film on the accommodating portion 30 side. The shape retaining member 40 is attached to at least either one of the 1 st side film 11 and the 2 nd side film 12. In the present embodiment, the shape retaining member 40 is disposed on the 1 st side film 11. The shape retaining member 40 is configured in a sheet shape. The shape retaining member 40 is formed in a band shape. The width of the shape retaining member 40 in the vertical direction HD of the package 1 may be constant. The width of the shape retaining member 40 in the vertical direction HD of the package 1 may be, for example, 3mm to 30 mm.
The shape retaining member 40 is disposed between the planned opening portion 50 and the bottom seal portion 22. In this state, the shape retaining member 40 is not bent. The shape retaining member 40 can retain a shape in a state of being bent so as to protrude in a direction from the 2 nd side surface film 12 toward the 1 st side surface film 11. Preferably, the shape retaining member 40 is disposed at a position 221 mm to 20mm closer to the bottom seal portion than the portion to be opened 50 in the vertical direction HD of the package 1.
The shape retaining member 40 is preferably disposed at the center of the package 1 in the width direction WD. The shape retaining member 40 is preferably continuously disposed between both ends of the package 1 in the width direction WD. In the present embodiment, the shape retaining member 40 is continuously disposed between both ends of the package 1 in the width direction WD.
Referring to fig. 3 and 4, the shape retaining member 40 includes a super stretched sheet SS, a 1 st sheet S1, and a 2 nd sheet S2. The super stretched sheet SS, the 1 st sheet S1, and the 2 nd sheet S2 are laminated with each other. The super stretched sheet SS is sandwiched between the 1 st sheet S1 and the 2 nd sheet S2. The super-stretch sheet SS extends in the width direction WD intersecting the vertical direction HD of the package 1.
The super-stretched sheet SS has the molecules oriented in the uniaxial direction. The molecular orientation direction of the super-stretch sheet SS is along the width direction WD of the package 1. The super-stretched sheet SS is configured to be easily bent about a folding line along the molecular orientation direction, and to be not easily bent about a folding line intersecting the molecular orientation direction, and to be able to maintain its shape in a bent state. Therefore, at least either one of the 1 st side film 11 and the 2 nd side film 12 to which the super stretched sheet SS is attached has deadlocking (dead hold). The deadlocking refers to a property of maintaining a bent state.
The 1 st sheet S1 and the 2 nd sheet S2 are configured to sandwich the super stretched sheet SS in a direction in which the 1 st side film 11 and the 2 nd side film 12 face each other. The 1 st sheet S1 and the 2 nd sheet S2 each extend in the width direction WD intersecting the vertical direction HD of the package 1. In the vertical direction HD of the package 1, each of the 1 st sheet S1 and the 2 nd sheet S2 may have the same width as the super stretched sheet SS.
The 1 st sheet S1 is attached to the super-stretch sheet SS and either one of the 1 st side film 11 and the 2 nd side film 12. The melting point of the 1 st sheet S1 was lower than that of the super stretched sheet SS. The 2 nd sheet S2 was attached to the super stretched sheet SS on the side opposite to the 1 st sheet S1. The melting point of the 2 nd sheet S2 was lower than that of the super stretched sheet SS.
Referring to fig. 1 and 5, in the present embodiment, the 1 st sheet S1 and the 2 nd sheet S2 are disposed at both ends of the package 1 in the width direction WD. At both ends of the package 1 in the width direction WD, the 1 st sheet S1 and the 2 nd sheet S1 are sandwiched between the 1 st side film 11 and the 2 nd side film 12, respectively.
At both ends of the package 1 in the width direction WD, the 1 st sheet S1 is welded to either one of the 1 st side surface film 11 and the 2 nd side surface film 12, and the 2 nd sheet S2 is welded to either one of the 1 st side surface film 11 and the 2 nd side surface film 12. Specifically, at both ends of the package 1 in the width direction WD, the 1 st sheet S1 is welded to the 1 st side surface film 11, and the 2 nd sheet S2 is welded to the 2 nd side surface film 12. The 2 nd sheet S2 is not welded to either the 1 st side surface film 11 or the 2 nd side surface film 12 except for both ends of the package 1 in the width direction WD.
Since the melting point of each of the 1 st sheet S1 and the 2 nd sheet S2 is lower than that of the super stretched sheet SS, each of the 1 st sheet S1 and the 2 nd sheet S2 is easily welded to the 1 st side film 11 and the 2 nd side film 12, compared to the super stretched sheet SS.
Further, in the case where the shape retaining member 40 is constituted only by the super stretched sheet SS, when the 1 st side surface film 11 and the 2 nd side surface film 12 are welded at both ends in the width direction WD of the package 1, the gap GP between the 1 st side surface film 11 and the 2 nd side surface film 12 is formed above and below the super stretched sheet SS.
On the other hand, in the present embodiment, since the shape retaining member 40 has the 1 st sheet S1 and the 2 nd sheet S2 sandwiching the super stretched sheet SS, the 1 st sheet S1 and the 2 nd sheet S2 melt at the time of fusion bonding, thereby filling the gap GP formed between the 1 st side film 11 and the 2 nd side film 12 above and below the super stretched sheet SS.
Therefore, in the present embodiment, the gap GP formed between the 1 st side film 11 and the 2 nd side film 12 above and below the shape retaining member 40 at the time of welding is smaller than in the case where the shape retaining member 40 is composed of only the super-stretched sheet SS. That is, the embedment of the 1 st sheet S1 and the 2 nd sheet S2 becomes good.
In addition, in the present embodiment, since the 1 st sheet S1 and the 2 nd sheet S2 are disposed on both sides of the super stretched sheet SS, the gap GP formed between the 1 st side film 11 and the 2 nd side film 12 above and below the shape retaining member 40 at the time of welding is smaller than in the case where only either one of the 1 st sheet S1 and the 2 nd sheet S2 is disposed on one side of the super stretched sheet SS.
In the present embodiment, the super stretched sheet SS is a sheet made of High Density Polyethylene (HDPE). Further, the 1 st sheet S1 and the 2 nd sheet S2 are each a sheet composed of Linear Low Density Polyethylene (LLDPE). That is, the shape retaining member 40 has a 3-layer structure in which layers of Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE) are stacked from the sealed side. In addition, the thicknesses of these layers may be (for example): the High Density Polyethylene (HDPE) is 200-600 μm, and the Linear Low Density Polyethylene (LLDPE) is 20-60 μm.
Next, the structure of the package 1 in a state where the content 10 is contained in the containing section 30 will be described with reference to fig. 6. In this state, the package 1 further includes the content 10 accommodated in the accommodating portion 30. In a state where the content 10 is accommodated in the accommodating portion 30, the other portions of the edges of the 1 st side film 11 and the 2 nd side film 12 are sealed at the portions to be sealed 23. Specifically, at the sealing scheduled portion 23, the 1 st side film 11 and the 2 nd side film 12 may be sealed to each other by thermal fusion. Thereby, all the edge portions 20 are sealed. Therefore, the containing section 30 is sealed in a state where the content 10 is contained in the containing section 30.
Next, the structure of the package 1 in a state where the package 1 is opened at the portion to be opened 50 will be described with reference to fig. 7 and 8. In a state where the package 1 is opened at the planned opening portion 50, the 1 st side film 11 and the 2 nd side film 12 on the upper end side than the opening are partially cut off in the vertical direction HD of the package 1. In this state, the package 1 further includes the content 10 accommodated in the accommodating portion 30, as in the state shown in fig. 6. The scheduled opening portion 50 is opened so that the outside of the package 1 communicates with the accommodating portion 30.
As shown in fig. 7, the user of the package 1 cuts the 1 st side film 11 and the 2 nd side film 12 from the cut CU in the width direction WD of the package 1, thereby opening the package 1 at the planned opening portion 50.
Next, as shown in fig. 8, after the package 1 is opened at the portion-to-be-opened 50, the shape retaining member 40 is deformed by the user of the package 1 into a state of being bent so as to protrude toward the side opposite to the 2 nd-side film 12, as shown by an arrow a in fig. 8. Thereby, the 1 st side film 11 to which the shape retaining member 40 is attached is deformed to be curved so as to protrude toward the side opposite to the 2 nd side film 12 in accordance with the shape of the shape retaining member 40. At this time, as shown by arrow B in fig. 8, at the upper end of the package 1 in the vertical direction HD, the edge seal portion 21 is deformed so that both ends of the package 1 in the width direction WD approach each other. Thereby, as shown by an arrow C in fig. 8, the 2 nd side film 12 constituting the opening is bent toward the side opposite to the direction in which the 1 st side film 11 is bent. Thus, the opening is widened. Then, the shape of the opening provided at the upper end in the vertical direction HD of the package 1 is maintained by the shape maintaining member 40 maintaining the shape in a state where the opening is widened. Thus, the state where the opening is widened is maintained.
Next, the operation and effects of the package according to the present embodiment will be described.
According to the package 1 of the present embodiment, the shape retaining member 40 is disposed between the planned opening portion 50 and the bottom seal portion 22, and includes the super-stretch sheet SS extending in the width direction WD of the package 1. The molecular orientation direction of the super-stretch sheet SS is along the width direction WD of the package 1. The super-stretched sheet SS is easily bent about a folding line along the molecular orientation direction, is not easily bent about a folding line intersecting the molecular orientation direction, and can maintain its shape while being bent. Therefore, the super stretched sheet SS can maintain a shape in a state of being bent in a direction in which the 1 st side film 11 and the 2 nd side film 12 face each other. Therefore, the shape of the 1 st side surface film 11 and the 2 nd side surface film 12 can be maintained in a deformed state in accordance with the shape of the super stretch sheet SS. Thus, when the package 1 is opened at the portion-to-be-opened 50, the shape retaining member 40 can maintain the state in which the opening is widened. Therefore, the content 10 is easily taken out from the opening. In addition, it is possible to easily put dishes into the receiving part 30 and take dishes out of the receiving part 30.
Further, the melting point of the 1 st sheet S1 attached to the super stretched sheet SS and either one of the 1 st side film 11 and the 2 nd side film 12 is lower than the melting point of the super stretched sheet SS. Therefore, it is easier to weld the 1 st sheet S1 to either of the 1 st side film 11 and the 2 nd side film 12 than to weld the ultra-stretch sheet SS. Therefore, the productivity of the package 1 can be improved.
According to the package 1 of the present embodiment, the shape retaining member 40 includes the 1 st sheet and the 2 nd sheet attached to the super-stretch sheet on the opposite side to the 1 st sheet. Therefore, the shape retaining member 40 can be attached without considering the front and back surfaces of the shape retaining member 40. Therefore, the productivity of the package 1 can be improved.
Further, the super stretched sheet SS was composed of high density polyethylene, and the 1 st sheet S1 and the 2 nd sheet S2 were each composed of linear low density polyethylene. Therefore, the 1 st sheet S1 and the 2 nd sheet S2 can be directly bonded to the super stretched sheet SS by the heat lamination process. Therefore, the productivity of the package 1 can be improved. In addition, since the 1 st sheet S1 and the 2 nd sheet S2 are not adhered to the super stretched sheet SS by the adhesive, the adhesive can be prevented from oozing out to the inside of the package 1.
Further, by sandwiching the high density polyethylene between the linear low density polyethylenes, the generation of the high density polyethylene residue can be suppressed. Therefore, the residue can be prevented from being mixed into the content 10. This improves the hygiene.
According to the package 1 of the present embodiment, the shape retaining member 40 is continuously disposed between both ends of the package 1 in the width direction WD. Therefore, by bending the shape retaining member 40 attached to the 1 st side film 11 to the side opposite to the 2 nd side film 12, the 2 nd side film 12 is bent to the side opposite to the 1 st side film 11 due to the rigidity of the shape retaining member 40. This facilitates opening of the package 1. Further, by bending the center of the package 1 in the width direction WD, the package 1 is easily opened between both ends of the package 1 in the width direction WD. Further, by continuously forming the shape retaining member 40 between both ends in the width direction WD of the package 1, the manufacture of the shape retaining member 40 becomes easy.
Further, at both ends of the package 1 in the width direction WD, the 1 st sheet S1 is welded to the 1 st side film 11, and the 2 nd sheet S2 is welded to the 2 nd side film 12. The 1 st sheet S1 and the 2 nd sheet S2 each were composed of linear low density polyethylene, and the super drawn sheet SS was composed of high density polyethylene. Therefore, the melting points of the 1 st sheet S1 and the 2 nd sheet S2 were lower than that of the super stretched sheet SS. Therefore, the 1 st sheet S1 and the 2 nd sheet S2 are both more easily welded to the 1 st side film 11 and the 2 nd side film 12 than the super stretched sheet SS. In addition, the 1 st sheet S1 and the 2 nd sheet S2 are melted at the time of welding, thereby filling the gap GP formed between the 1 st side film 11 and the 2 nd side film 12 above and below the super stretched sheet SS. Therefore, the gap GP formed between the 1 st side film 11 and the 2 nd side film 12 above and below the shape retaining member 40 at the time of welding becomes smaller as compared with the case where the shape retaining member 40 is constituted only by the super stretched sheet SS. This can prevent air, water vapor, contents 10, and the like from leaking from the gap GP.
According to the package 1 of the present embodiment, in a state where the content 10 is contained in the containing portion 30, the other portions of the 1 st side surface film 11 and the 2 nd side surface film 12 which are peripheral to each other are sealed at the portion to be sealed 23. Therefore, the storage section 30 can be sealed in a state where the content 10 is stored in the storage section 30.
According to the package 1 of the present embodiment, the portion to be opened 50 is opened so that the outside of the package 1 communicates with the accommodating portion 30. Therefore, in a state where the portion to be opened 50 is opened, the state where the opening is widened can be maintained by the shape retaining member 40.
(embodiment mode 2)
The structure of package 1 according to embodiment 2 of the present invention will be described with reference to fig. 9. Fig. 9 corresponds to fig. 2 of embodiment 1. In the package 1 according to embodiment 2, the shape retaining member 40 is attached to both the 1 st side film 11 and the 2 nd side film 12. The shape retaining member 40 according to the present embodiment includes a 1 st member 41 and a 2 nd member 42. Each of the 1 st member 41 and the 2 nd member 42 has the same configuration as the shape retaining member 40 of embodiment 1. The 1 st member 41 is attached to the 1 st side film 11. The 2 nd component 42 is mounted to the 2 nd side membrane 12. The 1 st part 41 is arranged to face the 2 nd part 42. The 1 st part 41 may be arranged at the same position as the 2 nd part 42 in the vertical direction HD of the package 1.
Next, the structure of the package 1 in a state where the content 10 is accommodated in the accommodating portion 30 will be described with reference to fig. 10. In this state, the package 1 further includes the content 10 accommodated in the accommodating portion 30.
Next, the structure of the package 1 in a state where the package 1 is opened at the portion-to-be-opened 50 will be described with reference to fig. 11 and 12. In this state, the package 1 further includes the content 10 accommodated in the accommodating portion 30, as in the state shown in fig. 10. Then, the scheduled opening portion 50 is opened to communicate the outside of the package 1 with the accommodating portion 30.
As shown in fig. 11, the user of the package 1 cuts the 1 st side film 11 and the 2 nd side film 12 from the cut CU in the width direction WD of the package 1, thereby opening the package 1 at the planned opening portion 50.
Next, as shown in fig. 12, after the package 1 is opened at the portion-to-be-opened 50, the 1 st member 41 is deformed by the user of the package 1 into a state of being bent so as to protrude toward the side opposite to the 2 nd side film 12, as shown by an arrow a in fig. 12. Thereby, the 1 st side film 11 to which the 1 st member 41 is attached is deformed to be curved so as to protrude toward the side opposite to the 2 nd side film 12 in accordance with the shape of the 1 st member 41.
As shown by an arrow C in fig. 12, the 2 nd member 42 is deformed by the user of the package 1 to be bent so as to protrude toward the side opposite to the 1 st side film 11. Thereby, the 2 nd side film 12 to which the 2 nd member 42 is attached is deformed into a state of being bent so as to protrude toward the side opposite to the 1 st side film 11 in accordance with the shape of the 2 nd member 42. At this time, as shown by arrow B in fig. 12, at the upper end of the package 1 in the vertical direction HD, the edge seal portion 21 is deformed so that both ends of the package 1 in the width direction WD approach each other. Thus, the opening is widened. Then, the shape of the opening provided at the upper end of the package 1 in the vertical direction HD is maintained by the shape maintaining member 40 maintaining the shape in a state where the opening is widened. Thus, the state where the opening is widened is maintained.
According to the package 1 of the present embodiment, the shape retaining member 40 includes the 1 st member 41 attached to the 1 st side film 11, and the 2 nd member 42 attached to the 2 nd side film 12. Therefore, the state in which the 1 st side film 11 is deformed can be maintained in accordance with the shape of the 1 st member 41, and the state in which the 2 nd side film 12 is deformed can be maintained in accordance with the shape of the 2 nd member 42. Thus, when the package 1 is opened at the portion to be opened 50, the 1 st member 41 and the 2 nd member 42 can maintain the opened wide state.
(embodiment mode 3)
The structure of package 1 according to embodiment 3 of the present invention will be described with reference to fig. 13 and 14. In the package 1 according to embodiment 3, the shape retaining member 40 is attached to both the 1 st side film 11 and the 2 nd side film 12 at different height positions.
The shape retaining member 40 according to the present embodiment includes a 1 st member 41 and a 2 nd member 42. Each of the 1 st member 41 and the 2 nd member 42 has the same configuration as the shape retaining member 40 of embodiment 1. The 1 st member 41 is attached to the 1 st side film 11. The 2 nd component 42 is mounted to the 2 nd side membrane 12. In the vertical direction HD of the package 1, the 1 st part 41 and the 2 nd part 42 are offset from each other. That is, the 1 st part 41 is arranged not to overlap the 2 nd part 42 in the vertical direction HD of the package 1. In other words, the 1 st part 41 is configured not to face the 2 nd part 42.
According to the package 1 of the present embodiment, the shape retaining member 40 includes the 1 st member 41 attached to the 1 st side film 11, and the 2 nd member 42 attached to the 2 nd side film 12. Therefore, the state in which the 1 st side film 11 is deformed can be maintained in accordance with the shape of the 1 st member 41, and the state in which the 2 nd side film 12 is deformed can be maintained in accordance with the shape of the 2 nd member 42. Thus, when the package 1 is opened at the portion to be opened 50, the 1 st member 41 and the 2 nd member 42 can maintain the opened wide state.
Further, in the vertical direction HD of the package 1, the 1 st part 41 and the 2 nd part 42 are offset from each other. Therefore, in the vertical direction HD of the package 1, the thickness of the package 1 becomes thinner as compared with the case where the 1 st member 41 is arranged at the same height position as the 2 nd member 42, and thus the package 1 is easily sealed. Therefore, the package 1 can be easily manufactured.
(embodiment mode 4)
The structure of the package 1 according to embodiment 4 of the present invention will be described with reference to fig. 15. The package 1 according to the present embodiment is mainly different in the outer shape of the package 1 compared to the package 1 according to embodiment 1. Specifically, the main difference is the shape of both ends of the package 1 in the width direction WD.
The package 1 is configured such that the width of the package 1 in the width direction WD increases from the lower end toward the upper end in the vertical direction of the package 1. That is, the package 1 has a tapered shape in which the dimension in the width direction WD of the package 1 increases from the lower end toward the upper end in the vertical direction of the package 1. In addition, the housing portion 30 is also configured such that the width in the width direction WD of the package 1 increases from the lower end toward the upper end in the vertical direction of the package 1. Therefore, in the vertical direction of the package 1, the cross-sectional area of the housing portion 30 at the cross section in the width direction WD of the package 1 increases from the lower end toward the opening.
According to the package 1 of the present embodiment, since the package 1 has a tapered shape in which the dimension in the width direction WD of the package 1 in the vertical direction of the package 1 increases from the lower end toward the upper end, it is more stable in a state in which the opening is widened.
The above embodiments 1 to 4 may be combined as appropriate.
Hereinafter, examples of the present invention will be described by comparison with comparative examples.
Comparative sensory evaluation was performed using each package of examples 1 to 2 and comparative example. Examples 1 to 2 are examples of the present invention. The comparative examples are comparative examples against examples of the present invention. Each package of examples 1 to 2 and comparative example was a self-standing bag having a 1 st side film, a 2 nd side film and a base film. The contents of examples 1 to 2 and comparative example were each fried rice. For the packages of examples 1 to 2 and comparative example, comparative sensory evaluation was performed in a state where the package was opened to communicate the outside with the containing portion.
Each of the packages of examples 1 to 2 and comparative example had a tapered shape in which the dimension in the width direction of the package in the vertical direction increased from the lower end toward the upper end. The contents were contained in the containing portions of the respective packages of examples 1 to 2 and comparative example. Each of the packages of examples 1 to 2 and comparative example had a total length in the vertical direction of 120mm, a total width in the width direction of the package at the upper end of 190mm, and a total width in the width direction of the package at the lower end of 170 mm.
The 1 st side film, the 2 nd side film, and the base film may each have a 3-layer structure obtained by, for example, laminating each layer of Linear Low Density Polyethylene (LLDPE), Nylon (NY), and transparent vapor-deposited polyethylene terephthalate (PET) from the sealed side. In addition, the thickness of each of these layers is: linear Low Density Polyethylene (LLDPE) 100 μm, Nylon (NY) 25 μm, transparent evaporated polyethylene terephthalate (PET) 12 μm.
The 1 st, super-stretched, and 2 nd sheets of the shape retaining member each had a 3-layer structure obtained by laminating respective layers of Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE) from the sealed side. In addition, the thicknesses of these layers are (for example): the High Density Polyethylene (HDPE) was 400 μm and the Linear Low Density Polyethylene (LLDPE) was 30 μm.
In each of the packages of examples 1 to 2, a shape retaining member was provided. In the package of embodiment 1, the shape retaining member is attached to one of the 1 st side film and the 2 nd side film. In the package of example 2, the shape retaining member was attached to both the 1 st side film and the 2 nd film. In the package of the comparative example, no shape-retaining member was provided.
The results of the comparative sensory evaluation are shown in table 1. As shown in table 1, in the comparative sensory evaluation, the openness, the ease of taking out the accommodated articles, and the overall evaluation were evaluated separately. The openness is the ease of opening of the portion to be opened. The ease of removing the contents is the ease of removing the contents. The overall evaluation is an average of the openness and the ease of removal of the accommodated article. These evaluations were evaluated into 5 grades by using numbers 1 to 5. Specifically, the worst case was evaluated as 1, the best case was evaluated as 5, and the middle case was evaluated as 3. The evaluators were 5 persons. The values evaluated were set as the average of 5 persons.
[ Table 1]
Opening property Ease of removal of contents Comprehensive evaluation
Example 1 4 5 4.5
Example 2 5 5 5.0
Comparative example 1 1 1.0
As a result of the comparative sensory evaluation, the evaluation of the openability and the ease of taking out the contained article were high for each of examples 1 to 2, as compared with the comparative example. Therefore, it is understood that each of examples 1 to 2 makes it easier to open the portion to be opened and to take out the content, as compared with the comparative example. The overall evaluation of each of examples 1 to 2 was higher than that of comparative example.
(embodiment mode 2-1)
Next, embodiment 2-1 of the present invention will be explained. In embodiment 2-1, the same components as those in embodiments 1 to 4 are denoted by the same reference numerals, and description thereof will not be repeated. That is, in embodiment 2-1, the same description as embodiments 1 to 4 will not be repeated.
Referring to fig. 16 and 17, the super stretched sheet SS is a sheet made of, for example, High Density Polyethylene (HDPE). The 1 st sheet S1 and the 2 nd sheet S2 may each be a sheet composed of Linear Low Density Polyethylene (LLDPE). That is, each of the 1 st sheet S1, the super stretched sheet SS, and the 2 nd sheet S2 may have a 3-layer structure obtained by laminating layers of Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE), for example, from the sealed side. In addition, the thicknesses of these layers may be, for example, as follows: the High Density Polyethylene (HDPE) was 200 μm and the Linear Low Density Polyethylene (LLDPE) was 30 μm.
The super stretched sheet SS may be formed by fusing. That is, the super stretched sheet SS may be formed by cutting while melting. In this case, the cut surface of the super stretched sheet SS is solidified after melting. Therefore, when the super-stretch sheet SS is High Density Polyethylene (HDPE), generation of high density polyethylene residues from the cut surface due to fuzzing of the cut surface can be suppressed. Note that the super-stretched sheet SS may be formed not by fusing but by melting a cut surface after cutting.
The super stretched sheet SS is solidified after being melted, thereby forming the melt portion MP. The super-stretched sheet SS is provided with a melting portion MP at each of one end Ea and the other end Eb in the vertical direction HD. In addition, the 1 st sheet S1 and the 2 nd sheet S2 are also provided with the melting portions MP at both ends in the vertical direction HD.
The super stretched sheet SS includes a central portion CP sandwiched between melting portions MP provided at one end Ea and the other end Eb, respectively. The central portion CP does not melt when fused. The density of the super stretched sheet SS at the melting portion MP is higher than that at the central portion CP. The melting portion MP provided at the one end Ea is provided between the one end Ea and the central portion CP. The melting portion MP provided at the other end Eb is provided between the other end Eb and the central portion CP. That is, the melting portions MP respectively provided on the one end Ea and the other end Eb have a thickness in the vertical direction HD.
The shape retaining member 40 has an upper surface 40a, a lower surface 40b, a weld surface 40c, and a front surface 40 d. The melting part MP may be provided on the entire surface of each of the upper and lower surfaces 40a and 40 b. In addition, the melting portion MP may be provided at the upper and lower ends of the fusion-bonded surface 40c and the front surface 40 d.
According to the package 1 of the present embodiment, the shape retaining member 40 is disposed between the planned opening portion 50 and the bottom seal portion 22, and includes the super-stretch sheet SS extending in the width direction WD of the package 1. The molecular orientation direction of the super-stretch sheet SS is along the width direction WD of the package 1. The super-stretched sheet SS is easily bent about a folding line along the molecular orientation direction, is not easily bent about a folding line intersecting the molecular orientation direction, and can maintain its shape while being bent. Therefore, the super stretched sheet SS can maintain a shape in a state of being bent in a direction in which the 1 st side film 11 and the 2 nd side film 12 face each other. Therefore, the shape of the 1 st side surface film 11 and the 2 nd side surface film 12 can be maintained in a deformed state according to the shape of the super stretch sheet SS. Thus, when the package 1 is opened at the portion-to-be-opened 50, the shape retaining member 40 can maintain the state in which the opening is widened. Therefore, the content 10 is easily taken out from the opening. In addition, it is possible to easily put dishes into the receiving part 30 and take dishes out of the receiving part 30.
Further, the super stretched sheet SS is provided with the melting portion MP at both one end Ea and the other end Eb in the vertical direction HD. Therefore, generation of residues of the super stretched sheet SS from the one end Ea and the other end Eb of the super stretched sheet SS, respectively, can be suppressed. This can prevent the residue from being mixed into the content 10.
The shape retaining member 40 is disposed between the 1 st side film 11 and the 2 nd side film 12. Thus, when the 1 st side film 11 and the 2 nd side film 12 are sealed to each other, the shape retaining member 40 can be attached to the 1 st side film 11 and the 2 nd side film 12 together. Therefore, the productivity of the package 1 can be improved. Further, since the shape retaining member 40 is disposed inside the package 1, the influence on the pattern attached to the outside of the package 1 can be suppressed.
According to the package 1 of the present embodiment, the melting portion MP provided at the one end Ea is provided between the one end Ea and the central portion CP, and the melting portion MP provided at the other end Eb is provided between the other end Eb and the central portion CP. Therefore, since the melting section MP has a thickness in the vertical direction HD, it is possible to effectively suppress generation of residues of the superdrawn sheet SS from the one end Ea and the other end Eb of the superdrawn sheet SS, respectively. This effectively prevents the residue from being mixed into the content 10.
Hereinafter, examples of the present invention will be described by comparison with comparative examples. Unless otherwise specified, examples and comparative examples have the same configuration as the package of any of the above embodiments.
Comparative sensory evaluation was performed using each of the packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2. Examples 2-1 to 2-2 are examples of the present invention. Comparative examples 2-1 to 2-2 are comparative examples against examples of the present invention. Each of the packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2 was a self-standing bag having a 1 st side film, a 2 nd side film and a base film. The contents of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2 were each fried rice. For the packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2, comparative sensory evaluation was performed in a state where the package was opened to communicate the outside with the containing portion.
Each of the packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2 had a tapered shape in which the dimension in the width direction of the package in the vertical direction increased from the lower end toward the upper end. The contents were contained in the containing portions of the respective packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2. Each of the packages of examples 2-1 to 2-2 and comparative examples 2-1 to 2-2 had a total length in the vertical direction of 120mm, a total width in the width direction of the package at the upper end of 190mm, and a total width in the width direction of the package at the lower end of 170 mm.
Each of the 1 st side film, the 2 nd side film and the base film has a 3-layer structure in which Linear Low Density Polyethylene (LLDPE), Nylon (NY) and transparent vapor-deposited polyethylene terephthalate (PET) are laminated from the sealed side. In addition, the thickness of each of these layers is as follows: linear Low Density Polyethylene (LLDPE) 100 μm, Nylon (NY) 25 μm, transparent evaporated polyethylene terephthalate (PET) 12 μm.
The 1 st, super-stretched, and 2 nd sheets of the shape retaining member each had a 3-layer structure obtained by laminating respective layers of Linear Low Density Polyethylene (LLDPE), High Density Polyethylene (HDPE), and Linear Low Density Polyethylene (LLDPE) from the sealed side. Further, the thicknesses of these layers are, for example, as follows: the High Density Polyethylene (HDPE) was 200 μm and the Linear Low Density Polyethylene (LLDPE) was 30 μm.
In each package of examples 2-1 to 2-2, a melting portion was provided at both one end and the other end of the ultra-drawn sheet of the shape retaining member. In the package of embodiment 1, the shape retaining member is attached to one of the 1 st side film and the 2 nd side film. In the package of example 2, the shape retaining member was attached to both the 1 st side film and the 2 nd film.
In each package of comparative examples 2-1 to 2-2, no fused portion was provided at both one end and the other end of the super drawn sheet of the shape retaining member. In the package of comparative example 1, the shape retaining member was attached to one of the 1 st side film and the 2 nd side film. In the package of comparative example 2, the shape retaining member was attached to both the 1 st side film and the 2 nd film.
The results of the comparative sensory evaluation are shown in table 2. As shown in table 2, in the comparative sensory evaluation, the openness, ease of handling, ease of taking out the accommodated articles, hygiene, and comprehensive evaluation were evaluated separately. The openness is the ease of opening of the portion to be opened. The ease of disposal is the ease of disposal of the package. The ease of removing the contents is the ease of removing the contents. Hygiene is the difficulty of High Density Polyethylene (HDPE) residues being incorporated into the contents. The overall evaluation is an average value of the opening performance, the ease of disposal, the ease of removal of the accommodated article, and the hygiene. These evaluations were evaluated into 5 grades by using numbers 1 to 5. Specifically, the worst case was evaluated as 1, the best case was evaluated as 5, and the middle case was evaluated as 3. The evaluators were 5 persons. The values evaluated were set as the average of 5 persons.
[ Table 2]
Opening property Ease of disposal Ease of removal of contents Hygiene property Comprehensive evaluation
Example 2-1 4 5 5 5 4.8
Examples 2 to 2 5 5 5 5 5.0
Comparative example 2-1 4 5 5 1 3.8
Comparative examples 2 to 2 5 5 5 1 4.0
As a result of comparative sensory evaluation, the evaluation of the hygiene properties was higher in examples 2-1 to 2-2 than in each of comparative examples 2-1 to 2-2. Therefore, it is understood that the High Density Polyethylene (HDPE) residue in each of examples 2-1 to 2-2 is less likely to be mixed into the contents than in each of comparative examples 2-1 to 2-2. It should be noted that the overall evaluation of each of examples 2-1 to 2-2 was higher than that of each of comparative examples 2-1 to 2-2. Further, the evaluation of the openness of example 2-2 was higher than that of example 2-1. Therefore, it is understood that the opening scheduled portion is more easily opened in example 2-2 than in example 2-1.
(embodiment mode 3-1)
Next, embodiment 3-1 of the present invention will be explained.
The present invention relates to a self-supporting bag which contains liquid, powder, granules, and the like, and when contents are taken out one by one after opening the bag, the opening is sufficiently wide, and the contents are less likely to adhere to the vicinity of the opening.
When contents are taken out from a package containing contents in a liquid form such as food, medicine, detergent, or powder, granule, etc. by using a device such as a spoon, chopsticks, or tweezers, the following problems are likely to occur if the opening is not sufficiently opened: the utensil or contents such as a spoon taken out come into contact with the opening of the packaging bag and are contaminated. Further, when the contents are disposed of after being discharged from the packaging bag, there are also problems as follows: even if cleaning is desired, the opening is easily closed, and thus cleaning is difficult.
For example, japanese patent application laid-open No. 2006-96388 proposes a self-standing bag in which a bottom film is heat-sealed to have a substantially boat shape or a substantially inverted trapezoid shape by being inserted into a lower portion of a front surface film and a rear surface film that are welded at lower end edges in a superposed state in a state folded in an inner direction of a bag portion and heat-sealed, thereby forming a bottom portion that spreads out in a planar shape, wherein the bottom portion is lowered toward a center from left and right joint portions that are joined to the front surface film and the rear surface film, and the welded portion (i.e., bottom heat-sealed portion) of the bottom film and the front surface film or the rear surface film is formed along an edge of the bottom film.
However, such a self-standing bag having a gusset (ガゼット) at the bottom has a bottom film at the bottom side and thus is easy to open, but has the following problems: at the upper top seal side, both ends may be welded, and the front surface film and the rear surface film are easily closed, making it difficult to take out the contents.
Further, in japanese patent application laid-open No. 2003-40290, a bag-shaped container is proposed in which a pair of band-shaped fastener members formed of a plastic material and having engaging portions that engage with each other are attached to an inner surface of an opening portion of a bag body, and the fastener members or attachment portions of the fastener members have a shape retaining property that enables plastic deformation.
The fastener member has shape retainability and is attached to the inside of the top seal portion, thereby easily fixing the opening portion. However, in this bag body, the male fastener member and the female fastener member are placed near the top seal portion before the opening, and thus, when the vicinity of the top seal portion is opened, the male fastener member and the female fastener member are formed into a shape close to a plane. Therefore, when the opening is opened, the front surface film and the rear surface film do not have a gap, and the opening must be forcibly widened. The following problems thus arise: the hand is soiled by widening the opening.
Therefore, an object of the present invention is to obtain a self-standing bag in which an opening is easily opened to a large extent and the contents are easily taken out without touching the vicinity of the opening.
The self-supporting bag of the present invention is a self-supporting bag characterized in that sealing surfaces of a front film and a back film face each other and a top sealing portion, a left sealing portion, a right sealing portion, and a bottom sealing portion of a gusset plate having a bottom film at the bottom are provided around the sealing surfaces, wherein at least one of the front film and the back film comprises a tearable film and a sealing layer in this order from the outermost layer side to the innermost layer side, and a tape having an opening holding function is welded thereto.
Since the self-supporting bag of the present invention has a function of holding the shape in a state where the opening portion is widened, the shape is held in a state where the opening portion is opened via the band having the opening holding function after the opening, and the opening portion can be enlarged and the opened state can be maintained. Therefore, the contents can be taken out with the tableware such as a spoon without soiling the contents and the tableware.
Embodiments of the stand-up pouch according to the present invention will be described with reference to the drawings. Fig. 18 is a front view showing the self-standing bag 101 according to the present invention. In the self-standing bag 101, the sealing surfaces of the front film 102 and the rear film 103 face each other, and are constituted by a top sealing portion 111, a left side sealing portion 112, a right side sealing portion 113, and a bottom sealing portion 114 as a gusset formed by sandwiching the bottom film 104 bent to the bottom with the sealing layer as the outer side between the front film 102 and the rear film 103.
The self-supporting bag 101 of the present invention is characterized in that at least one of the front film and the back film has a tearable film in its layer structure, and a tape 106 having an opening holding function is welded thereto.
A tape 106 having an opening holding function is welded to at least one of the front film 102 and the back film 103 in the unsealing direction. The surface to which the tape 106 having the opening holding function is welded is preferably the inner surface, but may be the outer surface.
The tape 106 having the opening holding function is a tape capable of holding the opening state of the opening.
Fig. 19 is a perspective view of the vicinity of the opening portion showing the unsealing step in the self-supporting bag according to the present invention. There is shown a step of tearing the self-supporting bag with the left unsealing start point 151 provided at the left side sealing portion 112 or the right unsealing start point 152 provided at the right side sealing portion 113 as a start point. The unsealing start point is provided below the top seal portion and is formed in the shape of a V-shaped cut in the figure, but may be a linear cut only or may be formed of a fine hole.
Fig. 20 is a perspective view of the self-standing bag 101 after being opened. The tearing is started from the unsealing start point, and the state where the tape 106 parallel to the opening portion and having the opening holding function inside the unsealed opening portion is opened is maintained, so that the self-standing bag 101 can be maintained in a state of a large opening. When the top seal portion 111 is present, the tape 106 having the opening holding function is welded in a state where the inner surfaces of the front film 102 and the rear film 103 are in contact with each other, and is placed in a state of being pressed flat, but after opening, by being held in a bent state, the self-standing bag can be held in an opened state.
Fig. 21 is a front view showing an example of the embodiment in which the width of the top seal portion is larger than the width of the bottom portion 104 in the self-standing bag 101 according to the present invention. As shown in the figure, the side seal portion has a tapered shape, so that the opening portion can be enlarged and easily opened, and thus the opened state of the opening portion can be easily maintained.
Fig. 22 is an oblique view showing a state after the pouch has been opened in the embodiment in which the width of the top sealed portion of the self-standing pouch 101 is larger than the width of the bottom portion 104 according to the present invention. The band 106 having the opening holding function can surely widen the opening portion and enlarge it in proportion to the direct, so that when the contents of the bottom portion are taken out with a spoon or the like, the contents can be taken out without being stained. Such a function enables the self-supporting bag 101 to be used as tableware instead of a large bowl or a wooden bowl, and further, depending on the taste, can be eaten after being added with seasonings or being sprinkled with laver, sesame, spices, and the like.
As a basic configuration of the laminated film constituting the self-supporting bag of the present invention, a film composed of a tearable film and a seal layer may be mentioned, but it is preferable to provide a barrier layer which improves the storage property of the contents, or a layer which imparts flexibility so that the bag is not easily broken when dropped, as an intermediate layer.
Examples of the tearable film include a polyethylene terephthalate film having linear cuttability, a polypropylene film having linear cuttability, and a polyamide film having linear cuttability. There is no particular limitation as long as it has mechanical strength and dimensional stability.
If necessary, a printed layer may be suitably provided on the tear film. The printing layer is a layer obtained by printing with an ink obtained by adding various pigments, extender pigments, plasticizers, drying agents, stabilizers and the like to a binder resin such as urethane-based, acrylic-based, nitrocellulose-based, rubber-based or the like. As the printing method, for example, known printing methods such as offset printing, gravure printing, flexographic printing, screen printing, and inkjet printing can be used. In addition, the surface of the base material layer may be subjected to a corona treatment or an ozone treatment as a pretreatment in advance to improve the adhesion of the printed layer.
As the sealing layer, a polyolefin-based resin is generally used, and specifically, a polyolefin-based resin such as low-density polyethylene, linear low-density polyethylene, medium-density polyethylene, high-density polyethylene, ethylene-vinyl acetate copolymer (EVA), ethylene-methacrylic acid copolymer (EMAA), ethylene-ethyl acrylate copolymer (EAA), ionomer, polypropylene, or the like can be used. These resins can be formed into films by an extruder such as a T-die or a bulking machine. May be single-layered or multi-layered. As the thickness of the film, it is preferably in the range of 50 to 200 μm. In particular, when a polyolefin resin having tearability is used, the cuttability is further improved.
As the adhesive layer, an adhesive for dry lamination can be used. For example, a two-pack curable urethane adhesive, a polyester urethane adhesive, a polyether urethane adhesive, an acrylic adhesive, a polyester adhesive, a polyamide adhesive, an epoxy adhesive, or the like can be used. As the bonding method, a dry lamination method may be used, but an extrusion laminator may be used to bond the films to the sealing layer side simultaneously with film formation, or polyethylene may be sandwiched.
Further, if it is necessary to improve various physical properties of the laminated sheet, for example, when the rigidity, drop strength, puncture strength, and the like of the laminated sheet are improved, or when the barrier properties against water vapor, oxygen, and the like are improved, a barrier layer may be provided.
Examples of barrier layers include aluminum foil, aluminum-deposited polyester film, inorganic oxide-deposited polyester film, and polyamide film. In addition, when the barrier layer is laminated, the lamination can be performed by a dry lamination method via an adhesive layer.
As the inorganic oxide, metal oxides such as silicon oxide, aluminum oxide, magnesium oxide, calcium oxide, potassium oxide, tin oxide, sodium oxide, boron oxide, titanium oxide, lead oxide, zirconium oxide, and yttrium oxide can be used. Among them, silica, alumina, magnesia and the like are preferable from the viewpoint of productivity and price.
The carrier film may have the same composition as the front film or the back film. However, from the viewpoint of ease of use and productivity, it is preferable to use a 2-axis stretch film of polyethylene terephthalate, polyamide, polypropylene, or the like as the face to be folded. Then, by making it thinner than the front film and the rear film, opening and closing can be performed smoothly.
< example 3-1>
As the front film and the back film, a laminated film composed of a linear cuttability polyethylene terephthalate film (12 μm)/a printing layer/an adhesive layer/a linear cuttability nylon film (15 μm)/an adhesive layer/an easy-cuttability linear low-density polyethylene film (80 μm) from the outside was used. As the base film, a laminated film composed of a polyethylene terephthalate film (12 μm)/an adhesive layer/a polyamide film (15 μm)/an adhesive layer/a linear low density polyethylene film (60 μm) from the outside was used, and the linear low density polyethylene film side was folded to the outside to form a gusset plate in which the front film and the rear film were welded together. As the shape-retaining tape, a tape having a configuration of linear low density polyethylene film (30 μm)/high density polyethylene sheet (400 μm)/linear low density polyethylene film (30 μm) and having a width of 10mm was used. The container was sized such that the upper side (opening side) had a width of 190mm, the lower side (bottom side) had a width of 170mm and a height of 140mm, an opening initiation point was provided at a position 120mm from the lower side, and a shape-retaining tape was welded to the inner surface at a position 12mm from the lower side, thereby producing a self-standing bag having a shape according to fig. 21.
< examples 3 and 2>
The polyethylene terephthalate films of the front film and the rear film were set to films obtained by vapor-plating silicon oxide on a 2-axis stretched polyethylene terephthalate film (12 μm) having no linear cutting property. Otherwise, a stand-up pouch was made according to example 3-1.
< examples 3 to 3>
The nylon films (15 μm) of the front film and the rear film were set to nylon films (15 μm) having no linear cuttability. Otherwise, a stand-up pouch was made according to example 3-1.
< examples 3 to 4>
The polyethylene terephthalate films of the front film and the back film were made into films obtained by vapor deposition of silicon oxide on 2-axis stretched polyethylene terephthalate films (12 μm) having no linear cuttability, and the linear low density polyethylene film (80 μm) was made into a linear low density polyethylene film having no easy cuttability. Otherwise, a stand-up pouch was made according to example 3-1.
< comparative example 3-1>
As the front film and the back film, a laminated film composed of a 2-axis stretched polyethylene terephthalate film (12 μm) having no linear cutting property deposited with silicon oxide, a printing layer/an adhesive layer/a 2-axis stretched polyamide film (15 μm) having no linear cutting property, an adhesive layer/a linear low density polyethylene film (80 μm) having no easy cutting property was used from the outside. Otherwise, a stand-up pouch was made according to example 3-1.
< comparative example 3-2>
The same laminate film as in comparative example 3-1 was used for the front film, the back film and the base film. In addition, no shape-retaining tape is used. Otherwise, a stand-up pouch was made according to example 3-1.
Evaluation test results of the stand-up pouch
Figure BDA0002688996930000271
Note) PET is polyethylene terephthalate, NY is nylon, LLDPE is linear low density polyethylene
< evaluation method >
As the content put into the self-supporting bag, 100g of hamburger dipped with the nectar sauce was set, and packaged. After heating in boiling water for 5 minutes, the pouch was opened from one opening starting point, and the openability, ease of handling, and property and appearance of taking out the contents with a fork, a spoon, and the like were evaluated.
< method for evaluating opening Property >
The top seal portion above the unsealing start point was grasped, and the opening was maintained after the unsealing, and whether or not the opening portion could be maintained in a largely opened state was evaluated so that the full score was 5.
< ease of handling >
After the contents were taken out, the ease of handling of the stand-up pouch was evaluated so that the full score was 5 points.
< method for evaluating Property of taking out Contents with tableware >
When the content was taken out with a fork, a spoon or the like, it was evaluated whether or not the content was taken out without touching the front end of the opening portion so that the full score was 5 points.
< method for evaluating aesthetic Properties >
The full score was 5 points, and whether the container was self-supporting as a beautiful container in an opened state was evaluated.
< evaluation results >
In example 3-1, the results of the opening property, the ease of handling, the property of taking out the contents with a meal, and the appearance were good. In examples 3-2, 3-3, and 3-4, the openability, the ease of handling, and the property of taking out the contents with a meal were all good, and as for the aesthetic appearance, there were only some irregularities on the straight line of the opening end face. In comparative example 3-1, since a force is required to open the container, the opened opening is not linear but is partially curved, and accordingly, the contents and the tableware are easily attached to the surroundings when the contents are taken out. At the same time, the aesthetic evaluation was also low. In comparative example 3-2, a force was required to open the seal, and the opening portion did not widen greatly even after opening. Therefore, the property of taking out the contents with the tableware is remarkably deteriorated, and the contents and the tableware are easily attached to the surroundings when the contents are taken out, and not only the opening portion but also the surroundings are stained.
From the above results, the opening property, the property of taking out the contents with the tableware, and the aesthetic property of the self-standing bag in which the front film and the back film were composed of the laminated film including at least the film having the linear cuttability and the tape having the opening holding function was welded were evaluated to be good.
As described above, the self-supporting bag of the present invention has self-supporting properties and can open the opening widely, so that the contents can be taken out without making the contents, the bag opening and the bag periphery dirty, and at the same time, the self-supporting bag can be used as tableware such as a large bowl. Further, since it can be manufactured by simply welding a tape having an opening holding function to the inner surface or the outer surface of the bag in parallel with the top seal portion, the advantages of the present invention are large, such as high productivity, and can be supplied at low cost.
(embodiment mode 4-1)
Next, embodiment 4-1 of the present invention will be explained.
The present invention relates to a packaging bag, and more particularly, to a packaging bag (pouch) in which contents are easily taken out by keeping an opening in an opened state after opening.
Packaging bags made from flexible packaging materials are used in a variety of applications. Among these, a packaging bag of a type generally called a self-standing bag, which is obtained by facing sealing layers of 2 continuous sheets to each other, inserting a bottom tape folded with the sealing layer as an outer side between the sealing layers, and heat-sealing the edges, has a large capacity, is self-standing, and has a good display effect in a store, and thus is widely used mainly in the field of washing products (see japanese patent application laid-open No. 2006-a 96388).
When a household dish such as hamburger steak is stored in a vertical pouch, the opening is not maintained in an opened state, and therefore, tableware cannot be smoothly put in and taken out, or hands are stained when the contents are taken out, and there is a problem that it is difficult to take out the contents.
Further, since the slit is not necessarily cut along a straight line when opening the package, there is a problem that: when eating, the contents may be attached to the opening, or the tableware may be caught by the opening. Further, when the opening is not linear, there is a problem that the appearance is poor.
In view of this, there are many problems in using a conventional self-supporting bag as tableware to be eaten.
On the other hand, a cup-shaped container is far superior to a packaging bag in terms of taking-out property and appearance of a seal, but has the following problems: higher cost and bulkier at disposal.
The problem to be solved by the present invention is to provide a self-supporting bag which has an aesthetically pleasing opening and can be used as a self-supporting bag for eating, since the opening can be kept open by a simple structure.
As means for solving the above problems, the invention described in this embodiment is a bag with an opening holding member obtained by facing sealing layers of two front and rear laminates each having a base layer and a sealing layer, inserting a base tape folded in an inverted V shape with the sealing layer of the laminate having the base layer and the sealing layer as an outer side between the two front and rear laminates, and heat-sealing an edge portion, wherein the front and rear laminates have opening lines formed in upper portions thereof, and a strip-shaped shape holding member is welded to the front sealing layer or the rear sealing layer immediately below the opening lines, and the opening lines are half-cut lines formed on the base layers of the laminates and obtained by laser processing.
In the bag with the opening holding member according to the present embodiment, the strip-shaped holding member is welded in the vicinity of the line to open the opening, and therefore the opening can be held in an open state.
The invention described in this embodiment is a bag with an opening holding member obtained by facing the sealant layers of two front and rear laminates each having a base layer and a sealant layer to each other, inserting a base tape folded in an inverted V shape with the sealant layer of the laminate having the base layer and the sealant layer as an outer side between the base tape and the sealant layer as an outer side, and heat-sealing the edge portion, wherein the front and rear laminates have opening lines formed in the upper portions thereof, and the strip-shaped holding member is welded to the sealant layers on both the front and rear surfaces immediately below the opening lines, and the opening lines are half-cut lines formed on the base layers of the laminates and obtained by laser processing.
Further, the invention described in this embodiment is a bag with an opening holding member, wherein 2 shape holding members welded to the sealing layers on both the front and rear surfaces in the vicinity of the opening scheduled line are welded at positions shifted in the vertical direction so as not to abut each other.
The invention described in this embodiment is a bag with an opening holding member, wherein the width of the upper portion of the laminated body constituting the front and rear surfaces is larger than the width of the bottom portion.
In addition, the invention described in the present embodiment is a bag with an opening holding member, wherein the shape holding member includes a high-density polyethylene resin tape extending in a longitudinal direction.
In the bag with an opening holding member according to the present invention, the strip-shaped shape holding member is welded in the vicinity of the line to open the opening, so that the shape holding member functions as an opening holding member for holding the opening in an open state, and therefore, the contents can be taken out easily.
Since the shape retaining member is provided in a direction parallel to the unsealing scheduled line, it is parallel to the flow direction of the laminated body, and can be continuously welded and attached to the laminated body. Therefore, the web (web り) of the laminate can be directly applied to the bag making machine.
Further, since the line to be opened is a half-cut line formed on the base layer of the laminate and obtained by laser processing, a straight and beautiful opening can be obtained.
As in the invention described in the present embodiment, when the strip-shaped shape holding members are welded to the sealant layers on both the front and rear surfaces immediately below the line to open the seal, the function of holding the opening is exhibited to the maximum.
As in the invention described in the present embodiment, when 2 shape-retaining members welded to the sealing layers on both the front and rear surfaces near the opening planned line are welded at positions shifted vertically so as not to abut each other, the case where the shape-retaining members are extremely thick in the state of the unfilled packaging bag is alleviated. In addition, heat sealing of the left and right sealing portions becomes easy.
As in the invention described in the present embodiment, when the width of the upper portion of the stacked body constituting the front and rear surfaces is larger than the width of the bottom portion, the opening portion is wider than the bottom surface, and therefore, the present invention can be more suitably used in a case where the stacked body is used as tableware directly after opening.
As in the invention described in the present embodiment, when the shape retaining member includes the high-density polyethylene resin tape extending in the longitudinal direction, the shape retaining member is easily welded to the polyolefin-based sealant layer, which is advantageous in terms of productivity.
Hereinafter, a bag with an opening holding member according to the present invention will be described in detail with reference to the accompanying drawings. Fig. 23 is a plan explanatory view schematically showing one embodiment of a bag 201 with an opening holding member according to the present invention. Fig. 24 is a sectional explanatory view schematically showing a section a-a' of fig. 23. Fig. 25 is a perspective view showing a state where the bag with the opening holding member shown in fig. 23 is opened so that the opening is opened. In addition, fig. 30 is a cross-sectional explanatory view schematically showing a laminated structure for one example of a laminated body and a shape retaining member used in the bag with an opening retaining member according to the present invention.
The bag with an opening holding member 201 according to the present invention is a self-standing bag obtained by facing the sealant layers of the front laminate 202a and the back laminate 202b having the base material layer 211 and the sealant layer 212 to each other, inserting the bottom tape 203 folded in an inverted V shape with the sealant layer of the laminate having the base material layer and the sealant layer as the outer side downward between them, and heat-sealing the edge portion, and is characterized in that the front and back laminates have opening lines 204 in the upper portion thereof, the front or back sealant layer immediately below the opening lines 204 is welded with a strip-shaped holding member 208, and the opening lines 204 are half-cut lines formed on the base material layer 211 of the laminate 210 by laser processing.
In fig. 23, the line 204 is a line indicating a planned opening position, and is a line obtained by half-cutting the front and rear laminated bodies by laser processing. The bag 201 with the opening holding member can be opened in the horizontal direction when the opening start portions 204a and 204a applied to the side seal portions 205a and 205b are triggered. Thus, the line 204 becomes an opening 204b after being opened.
Since the strip-shaped shape retaining member 208 is welded to the surface of any sealing layer in the vicinity of the line to open 204 in parallel with the line to open 204, the shape retaining member 208 is welded in the vicinity of the opening 204b after opening.
The shape retaining member 208 is a polymer material having shape retaining properties such as aluminum or soft iron, and a super-stretch tape or the like obtained by highly orienting molecules of a High Density Polyethylene (HDPE) resin in a uniaxial direction is known, for example. In the example shown in fig. 30, in order to facilitate welding to the sealing layer, a structure in which HDPE 216 is sandwiched between Linear Low Density Polyethylene (LLDPE) resins 215 on both surfaces is used. The thickness of each layer is, for example, LLDPE 30 μm/HDPE 400 μm/LLDPE 30 μm.
Since the shape retaining member 208 is welded to the vicinity of the opening 204b, the opening 204b can be retained in an opened state as shown in fig. 25. Therefore, the removal of the contents becomes easy, and the hands are not soiled.
The bag 201 with the opening retaining member according to the present invention is a packaging bag generally called a self-standing bag in terms of shape. In general, the contents are filled into the respective packaging bags in a bag-making state, but it is also possible to continuously repeat feeding out a web of the laminated body in an automatic bag-making and filling machine to perform filling while making a bag.
In the bag with an opening retaining member 201 according to the present invention, since the shape retaining member 208 is welded to the laminated body 210 in the direction parallel to the top seal portion 207, the laminated body 210 can be continuously fed from the web.
The laminate 210 includes at least a base layer 211 and a sealant layer 212, and generally includes a print pattern layer 213 and an adhesive layer 214 for bonding these layers as shown in fig. 30. In the laminate 210, an intermediate layer may be added between the base layer 211 and the sealant layer 212 or a gas barrier layer described later may be added to provide thickness and strength.
As the base layer 211, a material having heat resistance capable of withstanding tension at the time of printing or hot air drying and also capable of withstanding heat at the time of heat sealing is selected. Specifically, a stretched polyethylene terephthalate (PET) resin film, a stretched polypropylene (PP) resin film, a stretched nylon (ONy) film, or the like is used.
As a material of the sealing layer 212, a polyolefin resin is generally used. Specifically, ethylene resins such as low density polyethylene resin (LDPE), medium density polyethylene resin (MDPE), linear low density polyethylene resin (LLDPE), ethylene-vinyl acetate copolymer (EVA), ethylene- α -olefin copolymer, and ethylene-methacrylic acid resin copolymer; a blend resin of polyethylene and polybutylene; polypropylene resins such as homopolypropylene resins (PP), propylene-ethylene random copolymers, propylene-ethylene block copolymers, and propylene- α -olefin copolymers. The base material layer 211 may be provided with a gas barrier layer that inhibits permeation of oxygen or water vapor. The gas barrier layer may be provided on the rear surface of the base layer 211 as aluminum deposited or an inorganic oxide, or 1 layer may be added alone as a gas barrier film. By adding the gas barrier film, the storability of the contents can be improved.
As the gas barrier layer, a gas barrier film such as a polyvinylidene chloride film, a polyvinyl alcohol film, an ethylene-vinyl alcohol copolymer film, a gas barrier nylon film, a gas barrier polyethylene terephthalate (PET) film, or the like; a metal vapor-deposited film obtained by vapor-depositing a metal such as aluminum on a PET film or the like; an inorganic oxide film obtained by vapor deposition of an inorganic oxide such as alumina or silica on a PET film or the like; a gas barrier coating layer such as a resin layer comprising a polyvinylidene chloride-coated film, a film containing a water-soluble resin and an inorganic layered compound, and a film obtained by reacting a metal alkoxide or a hydrolysate thereof with an isocyanate compound; or a metal foil such as an aluminum foil.
As in the example shown in fig. 24, the shape retaining member 208 may be welded to the rear laminated body 202b, and particularly, although not shown, may be provided on the surface laminated body 202 a. As shown in fig. 26, the front and rear laminates may be provided (embodiment 2). At this time, as shown in fig. 27 and 28, if the 2 shape retaining members 208a and 208b are welded at positions displaced in the vertical direction so as not to abut each other, it is possible to avoid a case where the shape retaining members are extremely thick only at the positions of the shape retaining members when stacked in a bag state, in addition to the ease of sealing the side seal portions (embodiment 3).
Fig. 29 is a plan explanatory view schematically showing an example of the 4 th embodiment of the bag 201 with an opening holding member according to the present invention. In this embodiment, the upper portions of the laminated bodies 202a and 202b constituting the front and rear surfaces are characterized by having a larger width than the bottom portions. Since the opening portion 204b of such a bag becomes wider, the ease of taking out the contents can be further improved.
Based on the following examples and comparative examples, results for verifying the superiority of the bag with an opening holding member according to the present invention are shown. Hamburger steak was sealed in each of the prepared bags with an opening holding member, and evaluated by 5 panelists. As for the evaluation, the evaluation was performed on 5 ranks of 5 (good) to 1 (bad).
< example 4-1>
Using a 12 μm thick PET film as a base material layer, after printing a pattern layer on the rear surface, dry laminating with a 15 μm thick ONy film as an intermediate layer, further dry laminating an 80 μm thick LLDPE film as a sealant layer, and then using the resultant material as a laminate of the front and rear surfaces. The base tape has the same layer structure as the laminate of the front and rear surfaces, and does not include the pattern printed layer. The shape-retaining tape is welded to a side close to a predetermined position in the vicinity of the opening of the surface laminate. The configuration of the shape-retaining tape was LLDPE30 μm/HDPE400 μm/LLDPE30 μm. Using these laminates, a self-standing bag having a shape as shown in fig. 29 was produced. The dimensions of the bag are as follows: the width of the bottom surface is 170mm, the width of the top surface is 190mm, and the height is 120 mm. A half-cut line penetrating the base material layer is formed as a line to open the front and rear surface laminates at a position to be an opening by using a carbon dioxide laser.
< examples 4 and 2>
A self-supporting bag was produced in the same manner as in example 4-1, except that a gas barrier transparent vapor-deposited PET film having a thickness of 12 μm in which an inorganic oxide was vapor-deposited on the rear surface was used as the base layer.
< comparative example 4-1>
A self-supporting bag was produced in the same manner as in example 4-2, except that the half cut line was not processed.
< comparative example 4-2>
A self-supporting bag was produced in the same manner as in example 4-2, except that the shape-retaining tape was not welded and that the half-cut process was not performed. The evaluation results are shown in table 4.
[ Table 4]
Opening property Ease of disposal Taking out and putting in tableware Aesthetic property Comprehensive evaluation
Example 4-1 5 5 5 5 5.0
Example 4 to 2 5 5 5 5 5.0
Comparative example 4-1 5 5 3 2 3.8
Comparative example 4-2 2 5 2 2 2.8
As is clear from the results of table 4, the bag with the opening holding member according to the present invention is excellent in ease of use.
(embodiment mode 5-1)
Next, embodiment 5-1 of the present invention will be explained.
The present invention relates to a bag with a shape retaining member. In particular, the present invention relates to a self-supporting bag having an opening shape retaining function, which has a bottom plate and self-supporting properties, is a bag called a self-supporting bag, can retain an opening seal when opened, and has excellent linearity of the opened slit.
A bag, which is one kind of packaging material, is widely used, is composed of a single body or a laminate body having a plastic film as a base material, and various forms are used for various purposes, and have become an indispensable part in modern life.
For example, as a liquid container, it is widely used in the food field such as retort food in addition to beverages, and various products are also present on shelves in supermarkets, drugstores, and convenience stores in a large amount in the field of daily necessities and toiletries. In addition to liquid containers, various applications have also been developed.
Advantages of the bag compared to containers such as cans and bottles can be cited: inexpensive, can be handled with detailed material design depending on the quality required, or is light and space-saving before filling the contents and during distribution and storage. In addition, the bag is said to be environmentally friendly from the viewpoint of reducing waste.
Further, by printing highly precisely on a layer visible from the surface, it is possible to improve the image of the product and display necessary information on the contents, and printing of a barcode is a source of distribution, stock management, and marketing information of the product.
Among the bags, bags having self-supporting properties have been commercialized and are generally called self-supporting bags. The self-standing property makes it possible to facilitate the taking out of the contents.
In addition, when the self-standing bag is opened after cooking, attention must be paid to shape retention of the opening seal, and the like, in addition to the prevention of burns caused by residual water vapor and the ease of opening the opening seal.
In the case where the content is food, for example, when eating the food by directly taking out the dish from the bag with a spoon or a fork, it is desirable to maintain the opened state without closing the opening. The following states are preferred: the unsealed slit is also simultaneously linearly cut at a predetermined position.
Jp 2006-96388 a proposes a self-standing bag having self-standing properties in a state filled with contents, which is focused only on self-standing properties and filling properties, but does not consider openability, vapor permeability, a function of maintaining the shape of an opening, or the shape and linearity of a slit.
In addition, in general, in a convenience store or the like, many foods are contained in a tray, a plastic container, a stand-up pouch, or the like and provided to consumers. Wherein the trays and plastic containers need to be washed and disposed of after the contents are empty. However, it is difficult to implement the method in a dining space of a convenience store and outdoor dining.
In particular, among the self-supporting bags, a general self-supporting bag with a chuck is apt to close the opening of the bag, is not suitable for eating directly from the bag, and is difficult to take out the contents and take in and out the tableware.
The present invention has been made in view of the above circumstances, and an object thereof is to provide a self-supporting bag with an opening shape retaining function, which is capable of easily opening an opening seal, retaining the shape of the opening seal, and having excellent linearity of a slit for opening the seal, among self-supporting bags.
As means for solving the above problems, the invention described in the present embodiment is a self-standing bag with an opening shape retaining function, which is a bag composed of a laminate of a plastic film layer having an outermost layer, an intermediate film layer, and a sealing layer, characterized in that the bag is composed of a front bag body portion, a rear bag body portion, and a bottom film disposed therebetween, the front bag body portion and the rear bag body portion have four sides, the sealing layers are disposed facing each other, of the four sides, sealing is performed at both right and left end portions, both end portions of the bag body portion are sealed, the bottom film is folded and disposed between the front bag body portion and the rear bag body portion at a lower portion of the bag body portion and is sealed in an inflatable manner, the lower portion of the bag is sealed so as to be able to form a bottom surface, the front bag body portion and the rear bag body portion are sealed via an upper end portion after the contents are filled, the entire bag can be sealed, and a scoring line is provided below and along the seal at the upper end, and a band-shaped high-density polyethylene uniaxially stretched in the longitudinal direction is disposed and bonded along the scoring line to the innermost layer of at least one of the laminated bodies of the front bag body portion and the rear bag body portion below the scoring line, and the band-shaped high-density polyethylene has a shape retaining function capable of retaining deformation such as bending or curving.
In addition, the invention described in this embodiment is a self-standing bag having an opening shape retaining function, wherein the bonding of the band-shaped high-density polyethylene is by heat welding.
The invention described in this embodiment is a self-standing bag having an opening shape retaining function, wherein the uniaxially stretched tape-shaped high-density polyethylene is obtained by laminating linear low-density polyethylene layers on the front surface and/or the back surface.
In addition, the invention described in this embodiment is a self-standing bag with an opening shape retaining function, wherein the scoring line is a perforation or a half-cut line.
The invention described in this embodiment is a self-standing bag having an opening shape retaining function, characterized in that a gas barrier film layer having an inorganic compound vapor-deposited on the surface thereof is included in a laminate constituting the bag.
The present invention has been made in an effort to provide a self-standing bag with an opening shape maintaining function, which can maintain the shape of an opening in addition to facilitating the opening of the opening, and which has excellent linearity of a slit of the opening. In particular, according to the invention described in the present embodiment, the tape-shaped high-density polyethylene is bonded by heat welding, so that the influence of the adhesive or the like on the contents can be eliminated.
That is, the tape-shaped high-density polyethylene is preferably arranged on the innermost layer (i.e., the side in contact with the contents) of the bag because the influence of adhesion with an adhesive or the like is concerned, but the tape-shaped high-density polyethylene is preferably heat-welded because the tape-shaped high-density polyethylene has no influence other than polyethylene.
In particular, according to the invention described in the present embodiment, the linear low-density polyethylene is laminated on the tape-shaped high-density polyethylene, thereby enabling heat sealing, and the tape-shaped high-density polyethylene is easy to attach and is preferable in terms of productivity.
In particular, according to the invention described in the present embodiment, the scoring line is preferably perforated or half-cut, so that the scoring line can be easily opened, and the scoring line can be processed with higher productivity. Further, the linearity of the notch for opening the seal is also good, and there is no fear of burrs or the like at the end portion.
In addition, according to the invention described in this embodiment mode, in particular, the gas barrier film layer having an inorganic compound vapor-deposited on the surface thereof is included in the laminate, whereby the contents can be protected from the external environment (particularly, oxygen) and the like.
That is, in the case where the contents are foods or easily oxidized substances, the storability is effectively improved. Further, it has transparency as compared with a gas barrier layer made of metal, the content is visible from the outside of the bag, and it is also suitable for application such as high-frequency heating.
The present invention will be described in more detail below with reference to the accompanying drawings. However, the present invention is not limited to only the examples shown herein. The invention is defined by the claims.
Fig. 31 is a schematic plan view illustrating an embodiment of the self-supporting bag with an opening shape retaining function according to the present invention.
The self-supporting bag 310 with an opening shape retaining function according to the present invention is a self-supporting bag, and is composed of a laminate having an intermediate film layer and a sealing layer in addition to an outermost plastic film layer.
Further, the bag is constituted by a front side bag body portion 301, a rear side bag body portion 308, and a bottom film 306 folded and arranged therebetween, the front side bag body portion 301 and the rear side bag body portion 308 have four sides, the sealing layers are arranged to face each other, of the four sides, sealing is performed at both left and right end portions 302, and both end portions of the bag body portion are sealed.
That is, the bag has a substantially rectangular outer shape, and the bag body portion is constituted by the front bag body portion 301 and the rear bag body portion 308. Further, the bottom film 306 is folded and arranged between the front-side bag body portion 301 and the rear-side bag body portion 308 at the lower portion of the bag body portion, and is sealed in an expandable manner at the bottom seal portion 303, and the lower portion of the bag is sealed so as to be able to form a bottom surface in a state filled with the contents.
Therefore, sealing is performed in an expandable manner at the lower portion of the pouch through the bottom film 306, so that the pouch has self-standing property by forming a bottom surface through the bottom film 306 when filled with the contents.
In addition, the front bag body portion 301 and the rear bag body portion 308 are sealed at the bag body portion upper end portion 304 via the upper end portion 304 after the contents are filled, so that the entire bag can be sealed.
Further, below and along the seal of the upper end portion 304, a score line 305 is provided in the intermediate film layer of the laminate of the front bag body portion 301 and the rear bag body portion 308.
That is, the portion of the score processing line 305 is a portion where a fragile portion is formed in the laminate body constituting the bag, and is set as a line to open the bag. When the bag is opened, the bag can be easily opened by a finger as an easy-opening mechanism.
Further, the end portion of the curved line formed by the linear or curved line formed by the scoring line 305 is not disturbed when the bag is opened, and hence there is no fear of burrs or the like at the end portion, and the appearance, that is, the beauty of the cut is effectively improved. At the same time, the operation of taking out the contents from the opening portion is also effectively facilitated.
The scoring line 305 can be, for example, a punching process by a blade or a half-cut line, and in this case, it is preferable to process the scoring line 305 with higher productivity in addition to the easy-opening property. Further, the linearity of the notch for opening the seal is also good, and there is no fear of burrs or the like at the end portion, which is more preferable.
Further, a laser beam may be used to perform a punching process and form a half-cut line, and the laser beam may be appropriately selected and used.
Further, the scribing line 305 may be a continuous straight line or curved line of a half-tangent line, or may be a broken line such as a perforation. Alternatively, the "ハ" character of katakana may be continuous in the longitudinal direction, and may be any shape in consideration of easy opening, linearity of the cut portion, and difficulty in occurrence of burrs, etc., even if the character is similar to the character.
Further, a tape-shaped high-density polyethylene 309 uniaxially stretched in the longitudinal direction is disposed along the score line 305 and bonded to the innermost layer of at least one laminated body of the front side bag body portion 301 and the rear side bag body portion 308 below the score line 305.
In the self-standing bag 310 with an opening shape retaining function according to the present invention, the high-density polyethylene 309 in a band shape has a shape retaining function capable of retaining deformation caused by an external force such as bending or curving.
The example shown in fig. 31 is an example in which a band-shaped high-density polyethylene 309 is linearly provided extending from one end portion to the other end portion of a self-supporting bag 310 having an opening shape retaining function.
Fig. 32 is a schematic perspective view illustrating the unsealing and opening states of the self-supporting bag with an opening shape retaining function according to the embodiment of the present invention.
As described above, in the self-standing bag 310 with an opening shape retaining function according to the present invention, the scoring line 305 is provided along the sealing direction on the intermediate film layer of the laminate of the front bag body portion 301 and the rear bag body portion 308 below the seal of the upper end portion 304, and the band-shaped high-density polyethylene 309 uniaxially stretched in the longitudinal direction is arranged along the scoring line 305 and bonded to the innermost layer of at least one laminate of the front bag body portion 301 and the rear bag body portion 308 below the scoring line 305.
The example shown in fig. 32 is an example in which a band-shaped high-density polyethylene 309 is bonded to the innermost layer of the two laminated bodies of the front side bag body portion 301 and the rear side bag body portion 308.
The bonded tape-shaped high-density polyethylene 309 has a shape retaining function capable of retaining deformation such as bending or curving, and is effective in retaining the opening 311 after opening the bag. That is, the open seal 311 can be kept in an opened state all the time, and the contents can be easily taken out, which is more convenient.
In addition, in this way, for example, in the case where the content is a food or the like, it is possible to eat using utensils and tableware such as a spoon, a fork, a spoon, a chopstick, etc., without transferring the content to another container. In addition, in the case where the food is not in a liquid state, it can be easily taken out with fingers even when there is no danger of burning or the like.
Therefore, the container is not only used at home, but also used in a convenience store such as a food service store, and is convenient in handling, and is an environmentally friendly container.
The tape-shaped high-density polyethylene 309 may be bonded by heat fusion. That is, the tape-shaped high-density polyethylene 309 is disposed on the innermost layer (i.e., the side in contact with the content) of the bag, and can be bonded with, for example, an adhesive, but there is a possibility that the content is affected by the components derived from the adhesive, and in the case of thermal bonding, it is more preferable because it is considered that there is no effect other than the tape-shaped high-density polyethylene 309 and the seal layer.
Further, the tape-shaped high-density polyethylene 309 uniaxially stretched in the longitudinal direction may be provided as a material obtained by laminating linear low-density polyethylene layers on the front surface or/and the rear surface. By the linear low density polyethylene layer, the adhesion with the innermost layer of the bag improves the heat sealability, and the lamination strength of the heat-sealed portion also becomes large, which is also preferable in terms of productivity.
When linear low density polyethylene layers are laminated on both the front surface and the rear surface of the belt-shaped high density polyethylene 309, the heat sealability is effectively improved not only for the innermost layer of the bag but also for the sealed portions of the left and right end portions 302, and the lamination strength is effectively improved.
Further, a gas barrier film layer obtained by vapor depositing an inorganic compound on the surface may be disposed in the laminate constituting the bag. By including the gas barrier film layer on the surface of which the inorganic compound is vapor-deposited in the laminate, the contents can be protected from the external environment (particularly, oxygen, etc.).
That is, in the case where the content is, for example, food or a substance which is easily oxidized, the storability is effectively improved. Further, it has transparency as compared with a gas barrier layer made of metal, the content is visible from the outside of the bag, and it is also suitable for application such as high-frequency heating.
As described above, according to the present invention, it is possible to provide a self-standing bag with an opening shape maintaining function, in which the shape of an opening can be maintained in addition to easy opening of the opening, and the linearity of the slit of the opening is excellent.
Next, the respective materials used in the self-standing bag with an opening shape retaining function according to the present invention will be described.
< uniaxially stretched tape-shaped high-density polyethylene >
By uniaxially stretching high-density polyethylene (HDPE) to a high degree, a sheet having molecules aligned in a uniaxial direction can be produced. As polyethylene with a shape retaining function, it is sold as a commodity by a raw material manufacturer.
As a property of polyethylene with a shape-retaining function, it has a property of being able to freely change its shape like a wire by applying an external force, and continues to retain its shape after deformation with almost no folding back. In addition, this property can be reused, and punching processing and laminating processing can be performed. In addition, the polyethylene material is light in weight, can be recycled or incinerated, and is an environmentally friendly material.
Further, polyethylene with a shape retaining function does not rust like metal wires and the like, and is easy to recycle because it is polyolefin, and in some cases there is no fear of generating toxic gas or the like even if incinerated.
In the present invention, by being disposed at the innermost layer of the bag near the opening portion of the bag, the opening portion is opened and kept in a shape that is always opened when the bag is opened, thereby facilitating the removal of the contents.
In contrast, in the case of a conventional bag other than such a self-supporting bag with an opening portion shape retaining function, the opening portion is closed due to the rigidity or elasticity of the laminated body, which may cause difficulty in usability.
< Plastic film >
In the present invention, in the laminate constituting the self-standing bag 310 having the opening shape retaining function, the plastic film is used not only for the outermost plastic film layer but also for the intermediate film layer, the sealant layer, and the like. In the case of providing a gas barrier film layer, a plastic film may be used as the base film.
The plastic film is a film made of a polymer resin composition, and examples thereof include polyolefin (polyethylene, polypropylene, and the like), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, and the like), polyamide (nylon-6, nylon 66, and the like), polyimide, and the like, and can be appropriately selected according to the application.
In particular, when polypropylene or polyethylene terephthalate is used as the plastic film, it is more preferable in terms of film strength and price. In addition, when a stretched polyamide film is used, toughness against puncture or toughness against impact can be imparted to the laminate.
Further, the plastic film may be laminated with other layers via an adhesive layer to form a laminate. The layer structure of the laminate, the material composition thereof, the thickness, etc. may be appropriately designed according to the required quality of the bag.
< gas Barrier film >
In addition, for example, in order to improve the storability of the contents, a gas barrier layer may be provided in the laminate constituting the bag. For example, a gas barrier film formed by providing a gas barrier layer on the surface of a plastic film may be used.
Further, although a metal foil such as aluminum is effective as a gas barrier layer, it is not suitable because a high-frequency spark or the like is generated during cooking in a microwave oven.
In the case of the gas barrier film, the plastic film used is a film made of a polymer resin composition, and for example, polyolefin (polyethylene, polypropylene, or the like), polyester (polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, or the like), polyamide (nylon-6, nylon 66, or the like), polyimide, or the like can be used, and can be appropriately selected depending on the application. In particular, when polypropylene or polyethylene terephthalate is used as the plastic film substrate, it is more preferable in terms of film strength and price.
In the case of a gas barrier film, the gas barrier layer may be composed of a vapor deposition layer and a coating layer of an inorganic compound, and the vapor deposition layer and the coating layer may be sequentially provided after the anchor coating layer is provided on the plastic film.
In the anchor coat layer of the gas barrier film, urethane acrylate, for example, may be used. For forming the anchor coat layer, a coating method of coating a coating material in which a resin is dissolved in a solvent by a printing method such as gravure coating may be used, and a coating film may be formed by a conventionally known coating method.
As a method of forming the vapor deposition layer, an inorganic compound layer is formed via a vacuum evaporation method by coating an inorganic compound such as SiO or AlO on a plastic film provided with an anchor coating layer using a vacuum evaporation method. Incidentally, the thickness of the evaporated layer may be 15nm to 30 nm.
As a method of forming a coating layer, a coating agent containing, as a main agent, an aqueous solution or a water/alcohol mixed aqueous solution of (a) one or more alkoxides or/and hydrolysates thereof and (b) at least any one of tin chloride, and heating and drying to form an inorganic compound layer obtained by a coating method, may be applied to a film to form a coating layer. In this case, the silane monomer is added to the coating agent in advance, whereby the adhesion to the anchor coat layer can be improved.
Although the inorganic compound layer has gas barrier properties only by a coating film produced by a vacuum evaporation method, the gas barrier layer may be formed by overlapping an inorganic compound layer produced by a coating method (i.e., a coating layer) on an inorganic compound layer produced by a vacuum evaporation method (i.e., a deposition layer).
By the composition of these two layers, a reaction layer of the two layers is generated at the interface between the inorganic compound layer produced by the vacuum evaporation method and the inorganic compound layer produced by the coating method, or the inorganic compound layer produced by the coating method fills and reinforces defects or fine pores of pinholes, cracks, grain boundaries, etc. generated in the inorganic compound layer produced by the vacuum evaporation method, thereby forming a dense structure.
Therefore, the gas barrier film has flexibility to withstand deformation by an external force while achieving higher gas barrier properties, moisture resistance and water resistance, and can be suitably used as a packaging material.
In addition, for example, when SiO is used as the gas barrier layer, the coating film is transparent, and thus the contents can be visually observed from the outside of the bag. They may be used in a manner to be appropriately distinguished according to the use and the desired quality.
< sealing layer >
The 2 laminates were stacked so that the seal layers faced each other, and heat-sealed by applying pressure to bond the seal layers to each other, thereby forming a bag.
As a material of the sealing layer, a polyolefin-based resin among thermoplastic resins is generally used, and specifically, an ethylene-based resin such as a low density polyethylene resin (LDPE), a medium density polyethylene resin (MDPE), a linear low density polyethylene resin (LLDPE), an ethylene-vinyl acetate copolymer (EVA), an ethylene- α olefin copolymer, an ethylene-methacrylic acid resin copolymer, or the like; a blend resin of polyethylene and polybutylene; polypropylene resins such as homopolypropylene resins (PP), propylene-ethylene random copolymers, propylene-ethylene block copolymers, and propylene- α -olefin copolymers.
In forming the sealing layer, a molten resin may be formed into a film using an extruder or the like to form a layer on the laminate. Alternatively, a material which has been previously made into a film state may be laminated by lamination to form a sealing layer on the surface of the laminate.
< printing layer >
In order to improve the appearance of the product, display necessary information on the contents, and improve design properties, a printed layer may be provided on a layer visible from the outside of the bag in a laminate comprising a plastic film as a base. The print layer may also be disposed on the outermost layer of the bag.
In addition, the printed layer may be provided on a part of the bag, and may be provided on the entire surface of the bag. Alternatively, as a method of providing the display portion without using the printing layer, for example, a printed sticker may be attached to the surface of the bag.
Here, the printing method and the printing ink are not particularly limited, and may be appropriately selected from known printing methods and printing inks in consideration of printing suitability for plastic films, design properties such as coloring and color tone, adhesion, safety as food containers according to the application, and the like.
For example, the printing method may be appropriately selected from known printing methods such as a gravure printing method, an offset printing method, a gravure offset printing method, a flexographic printing method, a screen printing method, and an inkjet printing method. Among them, the gravure printing method can be preferably used in view of productivity, suitability for printing on plastic films, and high fineness of patterns.
As described above, according to the present invention, it is possible to provide a self-standing bag with an opening shape maintaining function, in which the shape of the opening can be maintained in addition to the opening being easily opened, and the linearity of the slit of the opening is excellent.
The present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to only the examples shown herein. The invention is defined by the claims.
As examples 5-1 and 5-2 according to the present invention and comparative examples 5-1 and 5-2 for comparison, a sample for evaluation of a self-standing bag was produced, the content was sealed and sealed, and then the content was taken out with opening and evaluated.
Fig. 33 is a schematic perspective view for explaining evaluation samples of an example and a comparative example in which the self-supporting bag with an opening shape retaining function according to the present invention is performed. That is, in the state where the sample for evaluation was opened and opened,
the upper edge (A) was 190 mm.
The lower side (B) was 170 mm.
The height (C) is 120 mm.
The contents of the evaluation samples of the examples and comparative examples of the self-supporting bag having the opening shape retaining function are as follows.
Content: and (4) hamburgers.
Evaluation items of the evaluation samples of the examples and comparative examples of the self-supporting bag with an opening shape retaining function are as follows.
Opening Retention
Ease of taking out contents with tableware
Ease of handling
The appearance of the cut end of the opening.
The evaluation methods of the evaluation samples of the examples and comparative examples of the self-supporting bag with an opening shape retaining function were as follows.
Comparative sensory evaluation was performed in a manner of 1 to 5 points.
The panelist was set to 5.
The evaluation score was 1 (difference) · · 5 (good).
The evaluation samples of the examples and comparative examples of the self-supporting bag with an opening shape retaining function were judged as follows.
The judgment is made based on the average score of the 4 evaluation items.
The score of 4 or more was regarded as pass, and the score of less than 4 was regarded as fail.
< example 5-1>
FIG. 34 is a schematic partial sectional view for explaining embodiment 5-1 of the self-supporting bag with an opening shape retaining function according to the present invention.
The layer structure of the stack 320 is as follows. Starting from the outside of the bag, a polyethylene terephthalate film 321 (thickness 12 μm)/a printed layer 322/an adhesive layer 318/a stretched polyamide film 323 (thickness 15 μm; perforated 324 treatment)/an adhesive layer 319/linear low density polyethylene 325 (thickness 80 μm)/a tape-shaped high density polyethylene 309 were provided.
< examples 5 and 2>
FIG. 35 is a schematic partial cross-sectional view for explaining embodiment 5-2 of the self-supporting bag with an opening shape retaining function according to the present invention.
The layer structure of the laminate is as follows. From the outside of the bag, a polyethylene terephthalate film 321 (thickness 12 μm) with an inorganic compound vapor-deposited layer 327, a printed layer 322, an adhesive layer 318, a stretched polyamide film 323 (thickness 15 μm; perforated 324 treatment), an adhesive layer 319, a linear low-density polyethylene 325 (thickness 80 μm), and a tape-shaped high-density polyethylene 309 were formed.
That is, compared with example 5-1, the difference is that: the gas barrier film 330 composed of the inorganic compound vapor-deposited layer 327 and the polyethylene terephthalate film 321 is used, but the configuration is within the scope of the present invention.
< comparative example 5-1>
FIG. 36 is a schematic partial cross-sectional view for explaining a self-supporting bag with an opening shape retaining function according to the present invention in comparative example 5-1.
From the outside of the bag, a polyethylene terephthalate film 321 (thickness 12 μm) with an inorganic compound vapor-deposited layer 327, a printed layer 322, an adhesive layer 318, a stretched polyamide film 323 (thickness 15 μm), an adhesive layer 319, a linear low-density polyethylene 325 (thickness 80 μm), and a tape-shaped high-density polyethylene 309 were formed.
That is, compared with example 5-2, the difference is that: it is not within the scope of the present invention that the stretched polyamide film 323 of the intermediate film is not subjected to the perforation 324 treatment.
< comparative example 5-2>
Fig. 37 is a schematic partial cross-sectional view for explaining a self-supporting bag with an opening shape retaining function according to comparative example 5-2.
The inorganic compound vapor-deposited layer 327 was formed on a polyethylene terephthalate film 321 (thickness: 12 μm), a print layer 322, an adhesive layer 318, a stretched polyamide film 323 (thickness: 15 μm), an adhesive layer 319, and a linear low-density polyethylene 325 (thickness: 80 μm).
That is, compared with example 5-2, the difference is that: it is not within the scope of the present invention that the stretched polyamide film 323 of the intermediate film is not subjected to the perforation 324 treatment and that the tape-shaped high density polyethylene 309 is not used at the innermost layer.
The evaluation results are shown in Table 5
[ Table 5]
Figure BDA0002688996930000471
As is clear from the results shown in table 5, the self-supporting bags with an opening shape retaining function according to examples 5-1 and 5-2 of the present invention were judged to be good, i.e., judged to be "good", since the average score of the evaluation was higher than those of comparative examples 5-1 and 5-2, and 5 scores were found among all the items.
This indicates that the following manner is effective for the evaluation items in the examples: the self-supporting bag with an opening shape-retaining function according to the present invention includes a band-shaped high-density polyethylene having a shape-retaining function in an innermost layer of the bag, and a score line provided on the intermediate film below the upper end portion.
As described above, according to the present invention, the self-standing bags with an opening shape retention function of examples 5-1 and 5-2 are more excellent than those of comparative example 5-2, and it can be demonstrated that an object of the present invention is to provide a self-standing bag with an opening shape retention function in which the shape of an opening can be retained in addition to easy opening of the opening and sealing, and the straight line of the cut of the opening and sealing is excellent.
The embodiments and examples disclosed herein are to be considered in all respects as illustrative and not restrictive. The scope of the present invention is indicated not by the foregoing description but by the scope of the claims, and is intended to include all modifications within the meaning and scope equivalent to the scope of the claims.
Description of the symbols
1 package, 10 contents, 11 1 st side film, 12 nd 2 nd side film, 13 bottom film, 20 edge portion, 21 edge sealing portion, 22 bottom sealing portion, 23 part to be sealed, 30 housing portion, 40 shape retaining member, 41 st 1 part, 42 nd 2 part, 50 part to be opened, HD vertical direction, S1 st 1 sheet, S2 nd 2 sheet, SS super stretch sheet, WD width direction.

Claims (8)

1. A package body is provided with: a 1 st side film, a 2 nd side film facing the 1 st side film, and a base film disposed between the 1 st side film and the 2 nd side film, the package comprising:
An edge portion disposed at an edge between the 1 st side film and the 2 nd side film,
A housing portion surrounded by the edge portion, and
a shape retaining member disposed between the 1 st side film and the 2 nd side film and attached to at least either one of the 1 st side film and the 2 nd side film,
the edge portion includes an edge sealing portion, a bottom sealing portion, and a predetermined sealing portion,
the edge sealing part seals a part of the edges of the 1 st side film and the 2 nd side film to each other,
the bottom sealing part respectively seals each of the 1 st and 2 nd side films and the base film,
the planned sealing portion allows the outside of the package to communicate with the housing portion without sealing the other portions of the edges of the 1 st side film and the 2 nd side film with each other,
at least either one of the 1 st side film and the 2 nd side film includes an opening scheduled portion for opening such that the outside of the package is in communication with the accommodating portion,
the shape retaining member is disposed between the scheduled opening portion and the bottom seal portion, and includes: a super-stretch sheet extending in a width direction intersecting a vertical direction of the package, and a 1 st sheet attached to either one of the 1 st side film and the 2 nd side film and the super-stretch sheet,
The direction of molecular orientation of the ultra-stretched sheet is along the width direction of the package, and
the melting point of the No. 1 sheet is lower than that of the super-stretched sheet.
2. The package of claim 1,
the shape retention member comprises a 2 nd sheet mounted on the super stretched sheet at a side opposite to the 1 st sheet,
the ultra-drawn sheet is composed of high density polyethylene,
the 1 st sheet and the 2 nd sheet are each composed of linear low density polyethylene.
3. The package of claim 2,
the shape retaining member is continuously disposed between both ends of the package in the width direction,
at the two ends, the 1 st sheet is welded to either one of the 1 st side film and the 2 nd side film, and the 2 nd sheet is welded to either the other of the 1 st side film and the 2 nd side film.
4. A package body is provided with: a 1 st side film, a 2 nd side film facing the 1 st side film, and a base film disposed between the 1 st side film and the 2 nd side film, the package comprising:
an edge portion disposed at an edge between the 1 st side film and the 2 nd side film,
A housing portion surrounded by the edge portion, and
a shape retaining member disposed between the 1 st side film and the 2 nd side film and attached to at least either one of the 1 st side film and the 2 nd side film,
the edge portion includes an edge sealing portion, a bottom sealing portion, and a predetermined sealing portion,
the edge sealing part seals a part of the edges of the 1 st side film and the 2 nd side film to each other,
the bottom sealing part respectively seals each of the 1 st and 2 nd side films and the base film,
the planned sealing portion allows the outside of the package to communicate with the housing portion without sealing the other portions of the edges of the 1 st side film and the 2 nd side film with each other,
at least either one of the 1 st side film and the 2 nd side film includes an opening scheduled portion for opening such that the outside of the package is in communication with the accommodating portion,
the shape retaining member is disposed between the scheduled opening portion and the bottom seal portion, and includes an ultra-stretched sheet extending in a width direction intersecting with a vertical direction of the package,
The direction of molecular orientation of the ultra-stretched sheet is along the width direction of the package, and
and one end and the other end of the ultra-drawing sheet in the vertical direction are both provided with a melting part.
5. The package according to claim 4,
the ultra-drawn sheet includes a central portion sandwiched between the melting portions provided at the one end and the other end respectively,
the melting portion provided at the one end is provided between the one end and the central portion, and
the melting portion provided at the other end is provided between the other end and the central portion.
6. The package according to claim 4 or 5,
the shape retaining member includes a 1 st member mounted on the 1 st side film and a 2 nd member mounted on the 2 nd side film, and
in the vertical direction, the 1 st part and the 2 nd part are offset from each other.
7. The package according to any one of claims 1 to 6, further provided with a content contained in the containing portion,
in a state where the contents are accommodated in the accommodating portion, the other portions of the edges of the 1 st side film and the 2 nd side film to each other are sealed at the predetermined sealing portion.
8. The package according to claim 7, wherein the predetermined opening portion is opened so that the outside of the package communicates with the accommodating portion.
CN201980020284.1A 2018-03-28 2019-02-13 Packaging body Active CN111867941B (en)

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JP2018-061577 2018-03-28
JP2018061577A JP7114979B2 (en) 2018-03-28 2018-03-28 package
JP2018-089128 2018-05-07
JP2018089128A JP7135412B2 (en) 2018-05-07 2018-05-07 standing pouch
JP2018111664A JP7167494B2 (en) 2018-06-12 2018-06-12 package
JP2018-111664 2018-06-12
JP2018136847A JP2020011768A (en) 2018-07-20 2018-07-20 Pouch with opening holding member
JP2018-136847 2018-07-20
JP2018154626A JP2020029278A (en) 2018-08-21 2018-08-21 Standing pouch with opening shape retaining function
JP2018-154626 2018-08-21
PCT/JP2019/005069 WO2019187723A1 (en) 2018-03-28 2019-02-13 Packaging body

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