JP2013049458A - Gusset bag and gusset bag with mouth member, and method for manufacturing them - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gusset bag and a gusset bag with a mouth member, which, even when crushed in a hand, hardly causes perceptible pain, and a method for manufacturing them.SOLUTION: A gusset bag with the mouth member 1 has the gusset bag 10 composed of an opposing pair of flat surface sections 11, 12 and an opposing pair of side surface sections 13, 14 folded inward, and the mouth member 20, wherein the flat surface section 11 and the pair of side surface sections 13 and 14 are comprised of a first film material, the flat surface section 12 is comprised of a second film material, and side edge seal sections are formed by sealing the side edges of the first film material and the second film material. Further a method for manufacturing the gusset bag with the mouth member 1 is provided.

Description

  The present invention relates to a gusset bag, a gusset bag with a mouth member, and a method for producing the same.

  As packaging bags for liquid or semi-liquid contents such as jelly beverages, standing pouches and flat bottom type gusset bags are used. In particular, in the case of applications that contain jelly beverages and the like, gusset bags that can be easily pushed out by squeezing with hands are widely used.

For example, as shown in FIG. 12 and FIG. 13, a pair of plane portions 111 and 111 facing each other and a pair of side edges of the plane portions 111 and 111 are connected to each other and folded to the inside so as to correspond to each other. There is known a gusset bag 101 with a mouth member comprising a gusset bag 110 made up of side surfaces 112 and 112 and a mouth member 120 attached to the gusset bag 110 and discharging the contents from the gusset bag 110 (for example, Patent Document 1).
In the gusset bag 101 with the mouth member, four side edge seal portions 113 are formed by heat-sealing the side edge portion of the flat surface portion 111 and the side edge portion of the side surface portion 112.

JP 2004-196414 A

  However, in the gusset bag 101 with the mouth member, when the hand is firmly held, the side edge seal portion 113 may hit the hand and feel pain. That is, the side edge seal portion 113 has a shape protruding toward the outside of the gusset bag 110, and the side edge seal portion 113 has a high rigidity and its end 113a is relatively sharp, so that it can be gripped by hand. Pain may be felt when the end 113a bites into the hand. In particular, when the content is a jelly beverage or the like, the content is usually pushed out and eaten as if the gusset bag 110 is crushed by hand. Therefore, it is desirable to make it difficult to feel pain even if the gusset bag 110 is crushed by hand.

An object of the present invention is to provide a gusset bag that does not feel pain even if it is crushed by hand, and a gusset bag with a mouth member in which a mouth member is attached to the gusset bag.
Another object of the present invention is to provide a method for manufacturing a gusset bag that is less likely to feel pain even if it is crushed by hand, and a method for manufacturing a gusset bag with a mouth member in which the mouth member is attached to the gusset bag.

The present invention employs the following configuration in order to solve the above problems.
[1] A gusset bag comprising a pair of opposed flat portions and a pair of opposed side portions folded inside,
The pair of flat surface portions and the pair of side surface portions are composed of a first film material forming one flat surface portion and at least one side surface portion, and a second film material forming the remaining portion,
A gusset bag in which a side edge portion of the first film material and a side edge portion of the second film material are sealed to form a side edge seal portion.
[2] The first film material is a film material that forms one flat surface portion and the pair of side surface portions, and the second film material is a film material that forms the other flat surface portion. ] The gusset bag described in the above.
[3] A gusset bag with a mouth member in which the mouth member is attached to the gusset bag according to [1] or [2].
[4] A method for continuously producing the gusset bag according to [2], comprising the following steps (α1) and (α2).
(Α1) A long first film material forming one flat surface portion and a pair of side surface portions is formed so that a plurality of the one flat surface portion and a plurality of side surface portions are formed in parallel along the longitudinal direction. In the folded state, transport with the long second film material that forms the other flat portion,
A portion between adjacent side portions in the first film material, a portion on the side end side of the side portion located on both ends, and the second film material are welded and cut along the longitudinal direction. And a step of obtaining a plurality of cylindrical film materials having the flat surface portion and the side surface portion on which the two side edge seal portions are formed,
(Α2) A step of subjecting the cylindrical film material to heat sealing and cutting along the short direction and dividing the cylindrical film material into a plurality of parts in the longitudinal direction.
[5] A method for producing a gusseted bag with a mouth member using the method for producing a gusseted bag according to [4], wherein when the upper part of the cylindrical film material divided in the longitudinal direction is sealed, the mouth The manufacturing method of the gusset bag with a mouth member which attaches a member.

The gusset bag and the gusset bag with a mouth member of the present invention do not feel pain even if they are crushed by hand.
In addition, according to the method for manufacturing a gusset bag of the present invention, a gusset bag that does not feel pain even if it is crushed by hand can be obtained.
Moreover, according to the manufacturing method of a gusset bag with a mouth member of the present invention, a gusset bag with a mouth member in which a mouth member is attached to a gusset bag that is less likely to feel pain even if it is crushed by hand.

It is the front view which showed an example of the gusset bag with a mouth member of this invention. It is a rear view of the gusset bag with a mouth member of FIG. It is sectional drawing when the gusset bag with a mouth member of FIG. 1 is cut | disconnected by straight line I-I '. It is the perspective view which showed a mode that the content was accommodated in the gusset bag with a mouth member of FIG. It is the front view which expanded the upper seal part vicinity of the gusset bag with a mouth member of FIG. It is sectional drawing when the gusset bag with a mouth member of FIG. 5 is cut | disconnected by straight line II-II '. It is the perspective view which showed the manufacturing process of the gusset bag with a mouth member of this invention. It is sectional drawing which showed the manufacturing process of the gusset bag with a mouth member of this invention. It is the perspective view which showed the manufacturing process of the gusset bag with a mouth member of this invention. It is sectional drawing which showed the manufacturing process of the gusset bag with a mouth member of this invention. It is sectional drawing which showed the other example of the gusset bag of this invention. It is the front view which showed an example of the conventional gusset bag with a mouth member. It is sectional drawing when the gusset bag with a mouth member of FIG. 12 is cut | disconnected by the straight line III-III '.

  The gusset bag and the gusset bag with a mouth member of the present invention are gusset bags of the same form except for the presence or absence of the mouth member. That is, the gusset bag of the present invention is a bag having the same form as the gusset bag with a mouth member except that the mouth member is not provided. Hereinafter, an embodiment of a gusset bag and a gusset bag with a mouth member of the present invention will be described in detail by showing an example of a gusset bag with a mouth member having a mouth member.

As shown in FIG. 1, the gusset bag 1 with a mouth member of the present embodiment has a gusset bag 10 and a mouth member 20 attached to the upper portion of the gusset bag 10 in a liquid-tight manner.
As shown in FIGS. 1 to 3, the gusset bag 10 includes a pair of opposed flat portions 11 and 12 and a pair of opposed side portions 13 and 14 that connect the side edges of the flat portions 11 and 12. . The flat surface portion 11 and the pair of side surface portions 13 and 14 are formed from a single film material. That is, the gusset bag 10 of this example is formed of two film materials, a first film material that forms the flat surface portion 11 and the pair of side surface portions 13 and 14, and a second film material that forms the flat surface portion 12. Has been.
The side surface parts 13 and 14 are folded into the inner side of the gusset bag 10 so that the folding lines 13a and 14a correspond to each other.

  As shown in FIGS. 2 and 3, both side edge portions of the flat portion 12 formed by the second film material, and the respective sides of the side surface portion 13 and the side surface portion 14 formed by the first film material. As shown in FIGS. 1 and 2, two side edge seal portions 15 whose edges are heat-sealed are formed. As shown in FIGS. 1 and 2, an upper seal portion 16 in which the flat portions 11 and 12 and the side portions 13 and 14 are sealed is formed. The gusset bag 10 is formed by forming a lower seal portion 17 formed and heat-sealed between the inner surfaces of the flat surface portions 11 and 12 and the side surface portions 13 and 14 at the lower portion. Thereby, the gusset bag 1 with a mouth member can accommodate the contents in the gusset bag 10 as shown in FIG.

  In the upper seal portion 16, the inner surfaces of the flat portions 11 and 12 and the side portions 13 and 14 are heat sealed. Moreover, in the upper seal part 16, it is preferable that the contact surfaces of the side surface parts 13, 13 and the side surface parts 14, 14 are sealed. For example, as shown in FIGS. 5 and 6, the seal between the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 in the upper seal portion 16 is in the vicinity of each side edge of the side surface portion 13 and the side surface portion 14. Punch holes are formed at opposing positions, and a seal portion 18 in which the inner surfaces 11a and 12a of the flat portions 11 and 12 are heat-sealed is formed in the punch holes. Moreover, even if the contact surfaces of the side surface parts 13 and 13 and the side surface parts 14 and 14 in the upper seal part 16 are directly bonded by an adhesive, a heat seal using a film having heat sealing properties, or a double-sided adhesive tape. Good.

Since the gusset bag 10 of the gusset bag 1 with the mouth member seals the side edge portions of the first film material and the side edge portions of the second film material, there are two side edge seal portions. As a result, the side edge seal portion that hits the hand is smaller than the conventional side edge seal portion in comparison with the four gusset bags, and it is difficult to feel pain even if it is crushed by the hand.
Moreover, since the flat part 11 and the side surface parts 13 and 14 of the gusset bag 10 are formed with one film material, the flat part 11 of the gusset bag 10 is shown in FIG. The side edge seal portion is not formed on the side, and there is no protruding portion. Therefore, when the gusset bag 10 is gripped by hand from the flat surface portion 11 side, the portion of the gusset bag 10 that touches the palm is smooth, so that it is less likely to feel pain.

The width d ₁ (FIG. 3) of the flat portion 12 formed of the second film material is within a range of ± 5 mm with respect to the width d ₂ (FIG. 3) of the flat portion 11 formed of the first film material. It is preferable to be within. Thereby, the gusset bag 10 which is hard to feel pain when grasped can be manufactured more simply.

  The pair of opposed flat portions 11 and 12 constitute the front surface and the back surface of the gusset bag 1 with a mouth member. In the present invention, the flat surface portion 11 may be used as the front surface and the flat surface portion 12 may be used as the back surface, or the flat surface portion 12 may be used as the front surface and the flat surface portion 11 may be used as the back surface.

  As a 1st film material which forms the plane part 11 and the side parts 13 and 14, the laminated | multilayer film which has a single layer film or a multilayer structure is mentioned. The first film material is preferably a laminated film from the viewpoint of imparting various functions, and more preferably a laminated film having an innermost layer capable of heat sealing, a functional layer, and an outermost layer.

Examples of the film used as the innermost layer include polyolefin resins such as low density polyethylene (LDPE), medium density polyethylene, high density polyethylene, polypropylene (PP), and linear low density polyethylene (LLDPE), or a mixed resin or ionomer thereof. An unstretched film comprising at least one selected from the group consisting of a resin, an ethylene-vinyl acetate copolymer, an ethylene-acrylic acid copolymer, an ethylene-methyl acrylate copolymer, and an ethylene-methacrylic acid copolymer. Can be mentioned.
The thickness of the innermost layer is preferably 30 to 200 μm.

As the film used as the outermost layer, a film having high mechanical suitability and printability is preferable. For example, the film which consists of synthetic resins, such as a polyester type, a polyamide type, a polypropylene type, a polycarbonate type, a polyacetal type, is mentioned. These films may be unstretched films or stretched films stretched in a uniaxial direction or a biaxial direction. The film used as the outermost layer is preferably a stretched film stretched in a uniaxial direction or a biaxial direction from the viewpoint of printability.
Specific examples include stretched plastic films such as biaxially stretched polyethylene terephthalate (PET), biaxially stretched polyamide (ONY), and biaxially stretched polypropylene (OPP).
Further, synthetic paper, cellophane, paper, non-woven fabric and the like can be used as necessary.
The thickness of the outermost layer is preferably 12 to 25 μm.

The functional layer is appropriately selected according to the required functions, such as gas barrier properties, mechanical toughness, flex resistance, puncture resistance, impact resistance, wear resistance, cold resistance, heat resistance, chemical resistance, etc. it can.
As the film used for the functional layer, for example, a metal foil such as aluminum, iron, copper, tin, polyethylene terephthalate, polyamide, polyvinyl chloride, polycarbonate, polyvinyl alcohol, saponified ethylene-vinyl acetate copolymer, or the like Films coated with polyvinylidene chloride or films deposited with inorganic materials such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide, magnesium oxide, films such as polyvinylidene chloride, and heat insulation Nonwoven fabrics and foamed films are exemplified.
The functional layer may be one layer or two or more layers.
The thickness of a functional layer should just be the thickness which can satisfy | fill the function requested | required of the gusset bag 10, and 6-20 micrometers is preferable.

Moreover, the 1st film material may use the vapor deposition film which provided the vapor deposition layer as a film used for an outermost layer instead of providing a functional layer.
Examples of the vapor deposition layer include inorganic substances such as aluminum, silicon oxide, aluminum oxide, indium oxide, tin oxide, zirconium oxide, and magnesium oxide.
Specific examples of the first film material include, for example, a film composed of PET (12 μm) / Al (7 μm) / ONY (15 μm) / LLDPE (60 μm) in order from the outermost layer.

  The 2nd film material which forms the plane part 12 can use the same thing as what was mentioned as a 1st film material which forms the plane part 11 and the side parts 13 and 14. FIG. At least the innermost layer of the second film material is preferably the same as the innermost layer of the first film material from the viewpoint of sealing properties.

  As shown in FIGS. 1 and 2, the mouth member 20 is inserted into the gusset bag 10, and is screwed onto the top of the pouring pipe 21 and the pouring pipe 21. And a cap 22 for sealing the spout. The mouth member 20 is liquid-tightly attached to the upper seal portion 16 by heat sealing in a state where the extraction pipe 21 is sandwiched between the upper edges of the flat portions 11 and 12.

As a material of the mouth member 20, at least a portion sealed with the inner surface of the flat portion 11 of the extraction pipe 21 is made of synthetic resin.
Examples of the synthetic resin that forms at least the seal portion of the outlet pipe 21 of the mouth member 20 include, for example, polyolefin resin, polyamide resin, polyester resin, (meth) acrylic resin, vinyl chloride resin, vinylidene chloride resin, polyethersulfone, Examples thereof include ethylene-vinyl alcohol copolymer. Of these, polyolefin resins are preferred because of their excellent processability and low cost.
Examples of the polyolefin resin include high-density polyethylene, medium-density polyethylene, high-pressure low-density polyethylene, linear low-density polyethylene, polyethylene-based resins such as ethylene-vinyl acetate copolymer, and ethylene-α-olefin copolymer. Olefin elastomers, polypropylene, ethylene-propylene random copolymers, polypropylene resins such as α-olefin-propylene random copolymers, and cyclic polyolefin resins. These resins may be blended for improving performance, or may be partially crosslinked for the purpose of improving heat resistance.

The mouth member 20 may be formed of a single material, or may have a multilayer structure formed of various resin layers.
The resin that forms at least the seal portion of the extraction pipe 21 of the mouth member 20 is formed of the same type of resin as the resin that forms the innermost layer of the flat portion 11 and the innermost layer of the flat portion 12 in terms of sealing properties. It is preferable.

(Production method)
As a manufacturing method of the gusset bag of this invention, the method which has the following process ((alpha) 1) and process ((alpha) 2) is mentioned. The manufacturing method is suitable when the first film material is a film material forming one flat surface portion and a pair of side surface portions, and the second film material is a film material forming the other film material. .
(Α1) A long first film material forming one flat surface portion and a pair of side surface portions is formed so that a plurality of the one flat surface portion and a plurality of side surface portions are formed in parallel along the longitudinal direction. In the folded state, transport with the long second film material that forms the other flat portion,
A portion between adjacent side portions in the first film material, a portion on the side end side of the side portion located on both ends, and the second film material are welded and cut along the longitudinal direction. And a step of obtaining a plurality of cylindrical film materials having the flat surface portion and the side surface portion on which the two side edge seal portions are formed,
(Α2) A step of subjecting the cylindrical film material to heat sealing and cutting along the short direction and dividing the cylindrical film material into a plurality of parts in the longitudinal direction.
In the case of manufacturing a gusset bag with a mouth member, in the step (α2), the mouth member is attached when the upper part of the tubular film material divided into a plurality of parts is sealed.
Hereinafter, the case of the gusset bag 1 with a mouth member having the gusset bag 10 will be described in detail.

Step (α1):
As shown in FIG. 7, the long first film material 10 </ b> A that forms the flat surface portion 11 and the pair of side surface portions 13, 14 has a longitudinal direction in which a plurality of the flat surface portion 11 and the pair of side surface portions 13, 14 are parallel. In the state of being folded so as to be formed along with the long second film material 10 </ b> B forming the flat portion 12, it is conveyed by a roll or the like.
Next, as shown in FIG. 8, the portion between the side surface portion 13 and the side surface portion 14 adjacent to each other in the first film material 10A and the second film material 10B are heat-sealed along the longitudinal direction. Further, the side portion from the side surface portion 13 located on one side end side of the first film material 10A and the side portion from the side surface portion 14 located on the other side end side of the first film material 10A. The end-side portion and the second film material 10B are heat-sealed along the longitudinal direction to form a heat-sealed portion 15A that becomes the side edge seal portion 15. Then, the heat seal portion 15A of the first film material 10A and the second film material 10B is cut along the straight line X, that is, along the longitudinal direction at the central portion of the heat seal portion 15A, as shown in FIG. As described above, a plurality of cylindrical film materials having the flat surface portions 11 and 12 and the side surface portions 13 and 14 in which two side edge seal portions 15 are formed are cut out.

Step (α2):
Shorter than the cylindrical film material obtained in the step (α1) along the straight line Y, that is, at a certain interval in the longitudinal direction of the first film material 10A and the second film material 10B. Along the direction, the inner surfaces of the flat portions 11 and 12 and the side portions 13 and 4 of the portion that becomes the lower seal portion 17 are heat sealed. Thereafter, the first film material 10A and the second film material 10B are arranged in a short direction along the straight line Y, that is, at a certain interval in the longitudinal direction of the first film material 10A and the second film material 10B. And is divided into a plurality of portions in the longitudinal direction to obtain a bag-like film material in which the lower seal portion 17 is formed below the flat surface portions 11 and 12 and the side surface portions 13 and 14.

Next, in the upper part of the flat portions 11 and 12 and the side portions 13 and 14 of the bag-shaped film material divided into a plurality, the inner surfaces of the flat portions 11 and 12 and the flat portions 11 and 12 and the side portions 13 and 13 are formed by heat sealing. 14 contact surfaces are sealed and the mouth member 20 is attached. Furthermore, the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 are sealed to form the upper seal portion 16. Examples of a method for sealing the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 in the upper seal 16 include the following methods.
As shown in FIG. 10, punch holes 13 b and 13 b are formed in the vicinity of the side edge of the side surface portion 13 so as to face each other. Similarly, punch holes 14b and 14b are formed in the vicinity of the side edge of the side surface portion 14 so as to face each other. Then, as shown in FIGS. 5 and 6, the formed punch holes 13 b and 13 b are heat-sealed by bringing the inner surface 11 a of the opposing flat surface portion 11 and the inner surface 12 a of the flat surface portion 12 into contact with each other, and the sealing portion 18 is formed. Form. Similarly, in the formed punch holes 14b, 14b, the inner surface 11a of the flat surface portion 11 and the inner surface 12a of the flat surface portion 12 are brought into contact with each other and heat sealed to form the seal portion 18. Thereby, the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 are sealed.
Moreover, the method of sealing the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 in the upper seal portion 16 is not limited to the above method, and the contact surfaces of the side surface portions 13 and 13 and the side surface portions 14 and 14 are the same. May be a method of bonding and fixing using an adhesive, a film having heat sealability, or a double-sided pressure-sensitive adhesive tape.
The gusset bag 1 with a mouth member is obtained by the above process.

In addition, although the method mentioned above is preferable at the point with easy manufacture, the manufacturing method of the gusset bag of this invention and the manufacturing method of a gusset bag with a mouth member are not limited to the method mentioned above.
In the step (α1), the method of cutting out a plurality of cylindrical film materials having the flat surface portions 11 and 12 and the side surface portions 13 and 14 in which the two side edge seal portions 15 are formed is along the longitudinal direction in the above-described method. Although it was the operation of cutting after heat sealing, welding and cutting may be performed simultaneously by fusing and sealing along the longitudinal direction.
Further, in the step (α2), an operation for forming the lower seal portion 17, an operation for cutting the tubular film material along the short-side direction and dividing it into a plurality in the longitudinal direction, and forming the upper seal portion 16. The operation of attaching the mouth member 20 may be performed either first or simultaneously. For example, after cutting the tubular film material along the short side direction and dividing it into multiple pieces in the longitudinal direction, the lower part of each divided tubular film material is sealed, and finally the upper part is attached to the mouth member May be sealed.

  In the gusset bag and the gusset bag with a mouth member of the present invention described above, a pair of flat portions and a pair of side portions of the gusset bag are formed of two film materials, a first film material and a second film material. Because there are few side edge seals, it is hard to feel pain when grasped by hand. In particular, when the first film material forms one flat surface portion and a pair of side surface portions, there is no side edge seal portion on the side surface of the flat surface portion formed by the first film material, and there is a portion that touches the palm. It is smooth. Therefore, even when the contents are pushed out by squeezing the gusset bag by hand, it is less likely to feel pain.

In addition, the gusset bag and gusset bag with a mouth member of this invention are not limited to the gusset bag 10 and the gusset bag 1 with a mouth member mentioned above. For example, the gusset bag and the gusset bag with a mouth member of the present invention may be formed with notches or tear lines for opening the bag.
Further, as shown in FIG. 11, the gusset bag of the present invention is a film material in which the first film material forms the flat surface portion 11 and the side surface portion 14, and the second film material is the flat surface portion 12 and the side surface portion 13. It may be a gusset bag 10A in which two side edge seal portions 15 are formed at diagonal positions.

DESCRIPTION OF SYMBOLS 1 Gazette bag with a mouth member 10 Gazette bag 10A 1st film material 10B 2nd film material 11, 12 Plane part 13, 14 Side part 15 Side edge seal part 20

Claims (5)

A gusset bag comprising a pair of opposed flat surface portions and a pair of opposed side surface portions folded inside,
The pair of flat surface portions and the pair of side surface portions are composed of a first film material forming one flat surface portion and at least one side surface portion, and a second film material forming the remaining portion,
A gusset bag in which a side edge portion of the first film material and a side edge portion of the second film material are sealed to form a side edge seal portion.   The said 1st film material is a film material which forms one plane part and a pair of side part, The said 2nd film material is a film material which forms the other plane part. Gusset bag.   A gusset bag with a mouth member, wherein the mouth member is attached to the gusset bag according to claim 1. A method for continuously producing the gusset bag according to claim 2, comprising the following steps (α1) and (α2).
(Α1) A long first film material forming one flat surface portion and a pair of side surface portions is formed so that a plurality of the one flat surface portion and a plurality of side surface portions are formed in parallel along the longitudinal direction. In the folded state, transport with the long second film material that forms the other flat portion,
A portion between adjacent side portions in the first film material, a portion on the side end side of the side portion located on both ends, and the second film material are welded and cut along the longitudinal direction. And a step of obtaining a plurality of cylindrical film materials having the flat surface portion and the side surface portion on which the two side edge seal portions are formed,
(Α2) A step of subjecting the cylindrical film material to heat sealing and cutting along the short direction and dividing the cylindrical film material into a plurality of parts in the longitudinal direction.   It is a manufacturing method of the gusset bag with a mouth member using the manufacturing method of the gusset bag of Claim 4, Comprising: A mouth member is attached when sealing the upper part of the said cylindrical film material divided into multiple in the longitudinal direction The manufacturing method of a gusset bag with a mouth member.

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