JP2017171356A - Package manufacturing method, and package - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely cut a heat-shrinkable cylindrical label or a label base material with laser, and form an opening.SOLUTION: A package manufacturing method includes: a mounting step in which a heat-shrinkable cylindrical label cylindrically formed of a label base material 31 having an opaque area Y and a colorless or colored transparent area Z is mounted on a container 1 by being thermally shrunk; and a cutting step in which an opening 6 is formed on the heat-shrinkable cylindrical label 4 by cutting the inside of the transparent area Z in the post-mounted heat-shrinkable cylindrical label 4.SELECTED DRAWING: Figure 16

Description

  The present invention relates to a method of manufacturing a package obtained by forming an opening portion in a part of a heat-shrinkable cylindrical label using a laser.

2. Description of the Related Art Conventionally, packages having a container and a heat-shrinkable cylindrical label, and the heat-shrinkable cylindrical label mounted on the container by heat shrinkage have been widely distributed. As such a package, for example, a bottle-type container filled with a beverage or the like and a heat-shrinkable cylindrical label mounted with heat-shrink can be used. The heat-shrinkable cylindrical label is also called a shrink label or a shrink tube.
Among such containers, there is also known a container in which a recessed portion whose outer surface is recessed inward is formed. Such a dent part can be used as a handle when the container is held by hand, for example.
However, when the heat-shrinkable cylindrical label is mounted including the dent portion of the container, the heat-shrinkable cylindrical label covers the dent portion so as to completely cover the dent portion. It becomes difficult.

In this regard, Patent Document 1 discloses a package in which an opening is formed in a portion corresponding to the dent in the heat-shrinkable cylindrical label so that the dent is not covered with the heat-shrinkable cylindrical label. It is disclosed.
As a method for forming such an opening, Patent Document 1 [0017] discloses cutting a heat-shrinkable cylindrical label with a laser. In such a forming method, a laser is irradiated so as to draw an endless ring in the surface of the heat-shrinkable cylindrical label attached to the container by heat-shrinking. The heat-shrinkable cylindrical label was cut according to the movement trajectory of the laser, and an edge (hereinafter referred to as label edge) was generated in the surface of the heat-shrinkable cylindrical label, and then surrounded by laser cutting. By removing the region, an opening is formed there (that is, the opening surrounded by the label edge in the surface of the heat-shrinkable cylindrical label becomes the opening).
Laser cutting is preferable in that an opening having a desired shape can be formed at a desired location.

However, when a heat-shrinkable cylindrical label is cut with a laser, there are often cases where the label substrate is not sufficiently cut.
In such a state having an insufficiently cut portion, when the region surrounded by the laser cutting is removed, the label base in the insufficiently cut portion is extended to form an opening. In addition, there is a problem that small protrusions (so-called burrs) are likely to occur. Such protrusions are conspicuous and impair the appearance of the package.

Special table 2003-509293 gazette

  The objective of this invention is providing the manufacturing method and package of a package which have the favorable external appearance in which the label edge part which forms an opening part is not conspicuous.

If the heat-shrinkable cylindrical label can be reliably cut with a laser, the area surrounded by the laser cutting can be easily removed, and a beautiful label edge can be formed. Therefore, the present inventors have intensively studied the cause of the above-mentioned insufficiently cut portion when laser cutting is performed.
Specifically, the heat-shrinkable cylindrical label is usually formed from a heat-shrinkable label base material, and the label base material is provided for purposes such as a transparent heat-shrinkable film and decoration. And a printing layer. As the print layer, a design print layer for displaying the design, an opaque print layer for making the design stand out or light-shielded, a transparent print for improving the slipperiness or protecting the film and the design print layer Examples include layers. The present inventors presume that these printing layers affect the quality of laser cutting, and laser-cut the label base material provided with the various printing layers on the heat-shrinkable film. As a result, when laser cutting a label base material provided with an opaque print layer, an insufficiently cut portion is generated, but laser cutting for a label base material provided with a transparent print layer is satisfactory. I found it. Under such knowledge, the present inventors have conceived that the above-mentioned problems can be solved by laser cutting in a transparent region.

  The first manufacturing method of the present invention includes a mounting step of mounting a heat-shrinkable cylindrical label, in which a label base material having an opaque region and a colorless or colored transparent region is formed into a cylindrical shape, by heat-shrinking the container. And a cutting step of forming an opening in the heat-shrinkable cylindrical label by cutting the inside of the transparent region of the heat-shrinkable cylindrical label after mounting using a laser.

  In the second production method of the present invention, before or after producing a heat-shrinkable cylindrical label in which a label base material having an opaque region and a colorless or colored transparent region is formed into a cylindrical shape, Cutting process for forming an opening by cutting the transparent region of the label substrate using a laser, and mounting process for mounting the container on the container by heat-shrinking the heat-shrinkable cylindrical label on which the opening is formed Have.

In a preferable method for producing a package of the present invention, a container having a recessed portion in which a part of the outer surface is recessed inward is prepared as the container, and in the mounting step, the heat-shrinkable cylindrical label is replaced with the recessed portion. Cover and attach to the container, and cut in the cutting step, including the region of the heat-shrinkable cylindrical label corresponding to the recess.
In the preferable method for producing a package of the present invention, the transparent region is surrounded by the opaque region, and a white print layer is provided in the opaque region.

According to another aspect of the present invention, a package is provided.
The package of the present invention has a container having a dent, and a heat-shrinkable cylindrical label that is heat-shrinkable and includes the dent of the container, and is in the plane of the heat-shrinkable cylindrical label. Has an opening leading to the recess, the label edge forming the opening is colorless or colored transparent, and an opaque part is provided surrounding the label edge. Yes.

According to the manufacturing method of a package of the present invention, a heat-shrinkable cylindrical label or a label base material can be reliably cut using a laser, and a package body in which a label edge forming an opening is not conspicuous can be obtained. .
Moreover, the package body of this invention has a favorable external appearance that the label edge part which forms an opening part is not conspicuous.

The front view of a container. The rear view of the container. The right view of the container. The expanded sectional view cut | disconnected by the IV-IV line of FIG. The reference expanded sectional view which shows the laminated structure of the main body of a container. The perspective view of the heat-shrinkable cylindrical label opened to the cylinder shape. The top view which looked at the label base material from the back side. Sectional drawing cut | disconnected by the VIII-VIII line of FIG. Sectional drawing cut | disconnected by the IX-IX line of FIG. The front view which shows the state which coat | covered the heat-shrinkable cylindrical label in the container in the mounting process of a 1st manufacturing method. The expanded sectional view cut | disconnected by the XI-XI line of FIG. The same mounting process WHEREIN: The expanded sectional view which shows the middle of exterior packaging the heat-shrinkable cylindrical label which concerns on a modification. The front view which shows the state which made the heat-shrinkable cylindrical label heat-shrink and mounted | worn in the container in the mounting process. The expanded sectional view cut | disconnected by the XIV-XIV line | wire of FIG. The front view which shows the state which cut | disconnected the mounted heat-shrinkable cylindrical label with the laser in the cutting process of a 1st manufacturing method. The front view which shows the state after removing the area | region enclosed by the cutting line produced by cutting | disconnection (front view of a package body). The expanded sectional view cut | disconnected by the XVII-XVII line of FIG. The further expanded sectional view which cut | disconnected the label edge part by the XVIII-XXVIII line | wire of FIG. The perspective view which shows the state after cut | disconnecting the heat-shrinkable cylindrical label before mounting | wearing with a laser in the cutting process of a 2nd manufacturing method, and removing the area | region enclosed with the cutting line. The front view which shows the state which coat | covered the heat-shrinkable cylindrical label in the container in the mounting process of a 2nd manufacturing method. The expanded sectional view cut | disconnected by the XXI-XXI line of FIG. The front view of the package using the container of a modification. The expanded sectional view cut | disconnected by the XXIII-XXIII line | wire of FIG. The front view of the package using the container of a modification. The expanded sectional view cut | disconnected by the XXV-XXV line | wire of FIG. The front view of the heat-shrinkable cylindrical label of a modification.

Hereinafter, the present invention will be specifically described with reference to the drawings.
In addition, in this specification, the "front" of a package and a container can be visually recognized when the container made to stand on a horizontal plane is viewed from any one of the directions orthogonal to the axial direction of the container. The “back” of the package and the container refers to the opposite side. The “front view shape” refers to a shape visually recognized when viewed from the one arbitrary direction. For example, FIG. 1 is a front view of the container as viewed from the side where the entire peripheral surface of one recess is visible. The horizontal direction is any one direction, and the vertical direction is a direction orthogonal to the horizontal direction.
The numerical range represented by “to” means a numerical range including numerical values before and after “to” as a lower limit value and an upper limit value.
It should be noted that the dimensions, scales and shapes of the layers, portions and members shown in each figure may differ from the actual ones.

In the first manufacturing method of the package of the present invention, a mounting step of mounting a heat-shrinkable cylindrical label on a container, a part or the whole of the surface of the heat-shrinkable cylindrical label after mounting is performed using a laser. It has at least the cutting process which forms an opening part in a heat-shrinkable cylindrical label by cut | disconnecting.
The second manufacturing method of the package according to the present invention is the method of forming a label base material into a cylindrical shape before or after producing a heat-shrinkable cylindrical label, a part or the whole of the label base material in the plane. And a cutting step of forming an opening by cutting using a laser, and a mounting step of mounting on a container by thermally shrinking a heat-shrinkable cylindrical label.
The 1st and 2nd manufacturing method of this invention may have other processes other than these processes.
Each of these steps may be performed in series on one production line, or one or more steps selected from the above steps may be performed on one line and the remaining steps may be performed on another one or Two or more lines may be used. Further, all of the steps may be performed by one practitioner, or one or more steps selected from the steps may be performed by one practitioner, and the remaining steps may be performed by another practitioner. The person may go.

<First manufacturing method>
[Preparation process]
A package, which is a manufacturing object, includes a container and a heat-shrinkable cylindrical label that has been heat-shrinked. The package may have other members provided that it has a container and a heat-shrinkable cylindrical label. In the first manufacturing method, the container and the heat-shrinkable cylindrical label are prepared.

(container)
The container is not particularly limited in terms of its material, and examples thereof include synthetic resin, glass, earthenware, and metal.
A container having an olefin surface portion in which an outer surface portion is formed of a polyolefin-based resin is preferable because it is difficult to be damaged by a laser. In other words, the container has a portion (this portion is an outer surface portion) that constitutes the outer surface of the container, in terms of the material, a portion (this portion is referred to as an olefin surface portion) formed from a polyolefin-based resin. It is preferable. As for this container, the whole outer surface part may be comprised from the olefin surface part, and a part of the outer surface part may be comprised from the olefin surface part.
In this specification, “formed from a polyolefin-based resin” means formed from a material containing a polyolefin-based resin as a main component. In the present specification, the “main component” refers to the most resin (weight ratio) among the resins contained in the layer. For example, the main component resin is contained in an amount of 50% by weight or more, preferably 70% by weight or more, more preferably 80% by weight or more when the total amount of the resin contained in the layer is 100% by weight.

1 to 4, the container 1 is, in terms of its structure, a main body 11 having a storage space for storing contents, a spout 12 formed at an end of the main body 11, and a detachable attachment to the main body 11. And a lid portion 13 which is attached so as to close the spout 12.
In a container having an olefin surface portion, at least one outer surface portion of at least one of the main body 11 and the lid portion 13 may have an olefin surface portion formed from a polyolefin-based resin. At least the outer surface portion is formed of a polyolefin resin.
In this case, the whole outer surface portion of the main body 11 may be composed of an olefin surface portion, and a part of the outer surface portion may be composed of an olefin surface portion.
In addition, when the cover part 13 has an olefin surface part, the whole outer surface part of the cover part 13 may be comprised from the olefin surface part, and a part of the outer surface part may be comprised from the olefin surface part.

Moreover, the main body 11 and the cover part 13 may each independently have a single layer structure, or may have a multilayer structure of two or more layers.
4 and 5 (a) show the main body 11 having a single layer structure. As described above, the main body 11 having a one-layer structure is entirely formed of synthetic resin, glass, ceramics, metal, or the like, but is preferably formed of polyolefin resin. The preferable main body 11 having a single-layer structure in the thickness direction is conceptually composed of a polyolefin-based resin in its entire thickness including the outer surface portion A.
FIG. 5B shows a main body 11b having a two-layer structure. As described above, in the main body 11b having the two-layer structure, at least the outer surface portion A is formed of synthetic resin, glass, earthenware, metal, or the like, but is preferably formed of polyolefin resin. The inner surface portion B of the main body 11b having a two-layer structure may be formed from a polyolefin resin, or may be formed from a material other than the polyolefin resin.
FIG. 5C shows a main body 11c having a three-layer structure. As described above, in the main body 11c having the three-layer structure, at least the outer surface portion A is formed of synthetic resin, glass, earthenware, metal, or the like, but is preferably formed of polyolefin resin. The inner surface part B and the intermediate part C of the main body 11c having a three-layer structure may be independently formed from a polyolefin-based resin or may be formed from a material other than the polyolefin-based resin. The main body having a multilayer structure of four or more layers is the same as the three-layer structure except that the intermediate portion has two or more layers.

In FIG. 5, the layer structure of the main body 11 is illustrated, but the same applies to the lid portion 13.
The thickness of the main body 11 is not particularly limited. For example, when the main body 11 is made of a synthetic resin, the thickness is 0.2 mm to 3 mm. In addition, when the main body 11 is the above multilayer structures, it is preferable that the thickness of the outer surface part A is 0.05 mm-2 mm.

  The polyolefin-based resin is a polymer (including an olefin-based elastomer) composed of olefin as an essential monomer component, that is, a polymer including at least an olefin in a molecule (in one molecule). Although it does not specifically limit as said olefin, For example, alpha-olefins, such as ethylene, propylene, 1-butene, and 4-methyl-1- pentene, are mentioned.

  Examples of the polyolefin resin include a polymer composed of ethylene as an essential monomer component (polyethylene resin), a polymer composed of propylene as an essential monomer component (polypropylene resin), and an ionomer. And cyclic olefin polymers. Among these, a polyethylene resin and a polypropylene resin are preferable.

The olefin surface portion may contain a resin other than the polyolefin resin (a resin other than the main component resin), but preferably does not substantially contain a resin other than the polyolefin resin.
In the present specification, “substantially free” means that a trace amount of components that are inevitably contained is allowed, and a significant amount is excluded.
When the olefin surface portion contains a resin other than the polyolefin resin, examples of the resin include polyester resins, polystyrene resins, vinyl chloride resins, polycarbonate resins, polyamide resins, and thermoplastic elastomers.

1 to 4, as described above, the container 1 has a main body 11, a spout 12, and a lid portion 13 from the viewpoint of structure, and the main body 11 preferably has a recess 2. Is formed. In addition, the container 1 may have parts other than these.
In the illustrated example, a cap that is detachably attached to the main body 11 by a screw action is illustrated as the lid portion 13. However, the lid portion 13 is not limited to a cap that is attached by a screw action, for example, a cap that is fitted to the main body 11, a cap that is attached to the main body 11 by an arbitrary method and opens and closes the spout 12 via a hinge, The trigger etc. which can pour the contents by spraying may be used.

The main body 11 has a bottom part 14 for allowing the container 1 to be self-supporting, and the container 1 can be self-supporting with the bottom part 14 down as shown in FIGS. 1 and 2.
The outer shape of the main body 11 is not particularly limited, and is substantially cylindrical, substantially elliptical, substantially polygonal, such as substantially rectangular or triangular, substantially conical, substantially conical, such as substantially conical, or substantially triangular. Or a substantially frustum shape such as a substantially quadrangular frustum shape, a substantially bowl shape, a substantially daruma shape, or a three-dimensional shape in which these shapes are combined. In the present specification, the “substantially” shape means a shape allowed in the technical field to which the present invention belongs. For example, “substantially” added to a polygon such as a square includes a shape in which a corner is chamfered, a shape in which a part of a side is slightly inflated or depressed, and a shape in which a side is slightly curved. . The abbreviations added to the circles and ellipses include a shape in which a part of the arc is inflated or depressed, a shape in which a part of the arc is a straight line or a diagonal line, and the like.
The main body 11 may have a straight body shape or a non-straight body shape (not a straight body shape). The straight cylinder shape refers to a shape whose circumferential length does not change in the axial direction, and the non-straight cylinder shape refers to a shape having a portion whose circumferential length varies in the axial direction. The outer shape of the main body 11 in the illustrated example has a substantially elliptic frustum shape except for the recessed portion 2. The upper portion of the main body 11 is an upper reduced diameter portion 111 whose peripheral length becomes smaller as it goes upward, and the lower portion of the main body 11 is a downward contraction whose peripheral length becomes smaller as it goes downward. The diameter portion 112 is formed.

A part of the outer surface of the main body 11 is recessed inward, and the portion is a recessed portion 2. The said recessed part 2 is a part of the external shape of the container 1, Comprising: The part recessed inside rather than the circumference | surroundings is said. Regarding the container 1, the inner side refers to the side approaching the storage space of the container 1, and the outer side refers to the opposite side.
As will be described later, the heat-shrinkable cylindrical label which has been heat-shrinked is attached to the container 1 by being in close contact with the outer surface of the main body 11 excluding the recess 2. That is, the recess 2 is a portion of the outer surface of the main body 11 that is not in contact with the heat-shrinkable heat-shrinkable cylindrical label. Hereinafter, a portion other than the dent portion in the main body 11 may be referred to as an “outing portion” in relation to the dent portion.
Specifically, a part of the outer surface of the main body 11 has a plurality of inflection points that change the direction to the inside, and a range surrounded by the set of the inflection points is a recessed portion 2 that is recessed inward. A collection of infinite number of inflection points is a boundary between the recessed portion 2 and the going-out portion, and constitutes a peripheral edge 2 a of the recessed portion 2. If the dent is compared to a volcano caldera, the set of inflection points corresponds to the outer ring of the caldera.
The peripheral edge 2a (a collection of infinite inflection points) of the recess 2 forms an endless annular line in front view.
The dent part 2 has a peripheral surface 2b that is continuous with the outing part and enters the inside at the peripheral edge 2a. The peripheral surface 2 b is also an outer surface of the recess 2. The peripheral surface 2b has, for example, an inclined surface shape that forms a curved surface that bulges outward or bulges inward, or an inclined surface shape that forms a flat surface.
In the example of illustration, the peripheral surface 2b of the dent part 2 is formed in the inclined shape which comprised the curved surface which swells outside as a whole.

The front-view shape of the recessed portion 2 is not particularly limited, and is substantially circular, substantially elliptical, substantially polygonal, such as substantially rectangular or substantially triangular, substantially daruma, or a combination of these shapes. Is mentioned. In addition, the front view shape of the dent part 2 is a peripheral shape of the dent part 2 when it sees from the front. In the example of illustration, the front view shape (front view shape of the periphery 2a) of the dent part 2 is made into the substantially elliptical shape.
The formation position of the dent part 2 is not particularly limited, and the dent part 2 may be formed at an appropriate position such as a central part, an upper part, or a lower part of the main body 11 when viewed from the front. In the example of illustration, the recessed part 2 is formed in the upper right part seeing from the front.

The recess 2 is formed in the main body 11 at one place or two or more places. In the production method of the present invention, when the heat-shrinkable cylindrical label is attached to the container 1 so as to cover the recess 2, at least one recess 2 may be covered. That is, when using the container 1 having a plurality of recesses 2, the heat-shrinkable cylindrical label may be mounted including at least one recess 2 in the mounting step.
In the example of illustration, the recessed part 2 is formed in two places. Hereinafter, the one dent 2 may be referred to as a “first dent” and the other dent 2 may be referred to as a “second dent”.

The first dent portion 21 is formed on the front side of the main body 11, and the second dent portion 22 is formed on the back side of the main body 11.
The first dent portion 21 and the second dent portion 22 are formed at the same position on the front and back surfaces of the container 1. Therefore, the second dent portion 22 is located on the back side of the first dent portion 21 when viewed from the front. doing. Moreover, the 1st dent part 21 and the 2nd dent part 22 are formed in the same shape and the same size, for example.
By forming the 1st dent part 21 and the 2nd dent part 22, the side part (right upper part seen from the front) of the main body 11 becomes easy to grasp with a hand. This side portion is a handle portion 15 that can be used as a handle.

Each of the first dent portion 21 and the second dent portion 22 may have a bottom surface continuous to the circumferential surface 2b. The bottom surface of the recessed portion 2 refers to a part of the outer surface of the recessed portion 2 located on the innermost side of the recessed portion 2.
In the example of illustration, the 1st dent part 21 and the 2nd dent part 22 do not have a bottom face, but are connected with each other. Therefore, the peripheral surface 2b of the first dent portion 21 and the peripheral surface 2b of the second dent portion 22 are continuous with each other, and a range surrounded by these peripheral surfaces 2b is the hole portion 16. The hole 16 is formed in a size that allows a hand to be inserted. By forming the hole 16, the handle 15 that can be gripped so as to be wrapped by hand is formed.
The handle portion 15 forms a part of the main body 11, and the inside of the handle portion 15 is hollow. Therefore, the inside of the handle portion 15 forms a part of the storage space of the main body 11. However, the handle portion 15 may be solid. In the illustrated example, the handle portion 15 is not limited to being formed integrally with the main body 11, and the handle portion and the hole portion may be formed by attaching a separate handle portion to the main body. (Not shown).

  The contents to be filled in the container 1 are not particularly limited, and beverages such as juice, seasonings such as edible oil and soy sauce, sanitary products such as liquid detergent and refill shampoo, pharmaceuticals such as alcohol for disinfection, cosmetics, etc. Is mentioned. The contents of the contents are not particularly limited as long as they can be taken out of the storage space, and may be liquid (including liquid having a certain degree of viscosity) or granular.

(Heat-shrinkable cylindrical label)
As shown in FIG. 6, the heat-shrinkable cylindrical label 3 before heat shrinking has a label base material 31, and the first side end portion 31 a and the second side end portion 31 b of the label base material 31 are bonded. This is a cylindrical body formed into a cylindrical shape. The heat-shrinkable cylindrical label 3 is externally attached to the container 1 by covering the container 1 and heating it. In addition, code | symbol "3" is attached | subjected to the heat-shrinkable cylindrical label before heat-shrinking, and code | symbol is attached to the heat-shrinkable cylindrical label (heat-shrinkable cylindrical label after heat-shrinking) with which the package was equipped. “4” is attached.
The heat-shrinkable cylindrical label 3 may be formed in a cylindrical shape before being packaged in a container, or may be formed in a cylindrical shape at the same time as being packaged in a container.
The heat-shrinkable cylindrical label 3 that is formed into a cylindrical shape at the same time as the exterior of the container is partially bonded to the inner surface of the first side end portion 31a of the label base material 31, and the base material is wound around the container. By bonding the inner surface of the second side end portion 31b of the base material to the outer surface of the first side end portion 31a, it is formed into a cylindrical shape.
Hereinafter, the heat-shrinkable cylindrical label 3 that is formed in a cylindrical shape before being packaged on the container will be mainly described.

As shown in FIG. 6, the heat-shrinkable cylindrical label 3 before the container is mounted is opened in a cylindrical shape when mounted on the container 1. However, when the heat-shrinkable cylindrical label 3 is manufactured, it is folded into a flat shape (not shown).
In a practical manufacturing process, the heat-shrinkable cylindrical label 3 is generally provided in the form of a continuous body in which a plurality of the heat-shrinkable cylindrical labels 3 are continuously connected and folded in a flat shape. Are appropriately cut to obtain individual heat-shrinkable cylindrical labels 3, which are opened into a cylindrical shape immediately before being packaged on the container 1.

As shown in FIG. 7, the label base material 31 has an opaque region Y and a colorless or colored transparent region Z from the viewpoint of transparent and opaque.
In addition, the label base material 31 has a heat-shrinkable film 311 and various printing layers 312, 313, provided on the heat-shrinkable film 311 as shown in FIGS. 314.

The heat-shrinkable film 311 is a transparent film having flexibility, and is a film that shrinks in the heat-shrink direction when heated to a heat-shrink temperature. Examples of the heat shrink temperature include 60 ° C to 120 ° C. The heat-shrinkable film 311 is preferably a transparent film that does not substantially contain an inorganic pigment.
Here, in this specification, “transparent” means that an arbitrary number (12 points in size) is printed with black ink on white paper at a location 1 cm away from the back side of a certain layer or part. A state where a thing is placed and the number or the portion can be seen through and the number can be seen from the surface side. “Transparent” may be colorless and transparent or colored and transparent. In this specification, “opaque” refers to a state in which numbers placed on the back side under the same conditions as described above cannot be seen from the front side through the certain layer or portion (a state in which numbers cannot be recognized).
The transparency index of the heat-shrinkable film 311 can be expressed using, for example, total light transmittance. The total light transmittance of the transparent heat-shrinkable film 311 is, for example, 70% or more, preferably 80% or more, and more preferably 90% or more. However, the total light transmittance refers to a value measured by a measurement method based on JIS K 7361 (a test method for the total light transmittance of a plastic-transparent material).
The heat-shrinkable film 311 may be either colorless and transparent or colored and transparent, but is preferably colorless and transparent.
Although the thickness of the heat-shrinkable film 311 is not particularly limited, for example, a film having a thickness of about 20 μm to 100 μm, and further about 20 μm to 80 μm can be used.

As the heat-shrinkable film 311, in view of thermal properties, a film that mainly heat-shrinks at least in the horizontal direction is used, and a film that heat-changes in the vertical direction may be used. When the label base material 31 is formed into a cylindrical shape (that is, when the heat-shrinkable cylindrical label 3 is formed using the label base material 31), the horizontal direction of the heat-shrinkable film 311 is the heat-shrinkable cylindrical label. 3 circumferential direction. As the heat-shrinkable film 311, a uniaxially stretched or biaxially stretched film mainly stretched in the transverse direction can be used.
The heat shrinkage rate in the transverse direction (heat shrinkage direction) of the heat shrinkable film 311 is not particularly limited, but is preferably 40% or more, more preferably 50% or more, and further preferably 60% or more. . In addition, although the thermal contraction rate in the said horizontal direction is so preferable that it is large, since there is a limit naturally, the thermal contraction rate in the said horizontal direction is theoretically less than 100%, Usually, it is 85% or less. . When the heat-shrinkable film is a film that thermally changes (heat shrinkage or heat expansion) in the vertical direction, the heat-shrinkable film is a film that heat-extends in the vertical direction (for example, heat shrinkage in the vertical direction obtained by the following formula) Although a film having a rate of −3% or more may be used, a film that thermally shrinks in the vertical direction is preferable from the viewpoint of particularly improving the beauty of the edge of the label edge generated after laser cutting. The heat shrinkage rate in the longitudinal direction of the heat-shrinkable film is, for example, 1% or more, preferably 5% or more, more preferably 7% or more, and further preferably 9% or more. If the heat shrinkage rate in the longitudinal direction is too large, the heat-shrinkable cylindrical label is liable to be displaced at the time of mounting, so it is 40% or less, preferably 35% or less, more preferably 30% or less. It is.
However, the heat shrinkage ratio is a ratio of the length of the film before heating (original length) and the length of the film after immersion in warm water at 100 ° C. for 10 seconds (length after immersion). Substituting into the following formula.
Heat shrinkage rate (%) = [{(original length in horizontal or vertical direction) − (length after immersion in horizontal or vertical direction)} / (original length in horizontal or vertical direction) ] × 100.

Examples of the heat-shrinkable film include a heat-shrinkable synthetic resin film, a heat-shrinkable nonwoven fabric, a heat-shrinkable foamed resin film, and a laminated film thereof. The laminated film may be a laminate of a layer having no heat shrinkability and a layer having heat shrinkability, provided that the laminate as a whole has heat shrinkability. Is preferably a laminate having heat shrinkability.
Preferably, a synthetic resin film or a synthetic resin laminated film is used as the heat-shrinkable film. The heat-shrinkable film may be laminated with a gas such as a metal vapor deposition layer and / or a light barrier layer as necessary.

The material of the synthetic resin film or the synthetic resin laminated film is not particularly limited, and polyester resins such as polyethylene terephthalate and polylactic acid; olefin resins such as polyethylene, polypropylene, and cyclic olefin; polystyrene, styrene-butadiene copolymer, and the like. One type selected from thermoplastic resins such as polystyrene resins, polyamide resins, and vinyl chloride resins, or a mixture of two or more types. The heat-shrinkable film is preferably a heat-shrinkable film containing at least one of a polyester resin and a polystyrene resin as a main component because it has a large amount of laser absorption and can be easily cut by a laser.
When the heat-shrinkable film is composed of a multilayer laminated film, it may be an even-numbered laminated film such as two layers, but is preferably an odd-numbered laminated film such as three layers.
The multilayer structure of the odd-numbered laminated film is represented by outer layer / odd middle layer / inner layer, for example, outer layer / one middle layer / inner layer, outer layer / first middle layer / second middle layer / Examples include the third intermediate layer / inner surface layer.

When the heat-shrinkable film is composed of a multilayer laminated film mainly composed of at least one of a polyester-based resin and a polystyrene-based resin, each of these layers is independently a layer mainly composed of a polyester-based resin (hereinafter, A polyester resin layer), a layer mainly composed of a polystyrene resin (hereinafter referred to as a polystyrene resin layer), and a layer mainly composed of a mixed resin of a polyester resin and a polystyrene resin (hereinafter referred to as a mixed resin). Selected from the layer).
For example, as an example of the outer surface layer / one intermediate layer / inner surface layer, (a) polyester resin layer / polyester resin layer / polyester resin layer, (b) polystyrene resin layer / polystyrene resin layer / polystyrene resin Resin layer, (c) polystyrene resin layer / polyester resin layer / polystyrene resin layer, (d) polyester resin layer / polystyrene resin layer / polyester resin layer, (e) polyester resin layer / mixed resin layer / Polyester resin layer, (f) polystyrene resin layer / mixed resin layer / polystyrene resin layer, and the like.
Examples of outer surface layer / first intermediate layer / second intermediate layer / third intermediate layer / inner surface layer are: (g) polyester resin layer / polystyrene resin layer / polyester resin layer / polystyrene resin layer / polyester Resin layer, (h) polystyrene resin layer / polyester resin layer / polystyrene resin layer / polyester resin layer / polystyrene resin layer, (i) polystyrene resin layer / polyester resin layer / polyester resin layer / polyester Resin layer / polystyrene resin layer, (j) polyester resin layer / polystyrene resin layer / polystyrene resin layer / polystyrene resin layer / polyester resin layer, (k) polyester resin layer / mixed resin layer / mixed Resin layer / mixed resin layer / polyester resin layer, (l) polystyrene resin layer / mixed resin layer / mixed resin layer / Composite resin layer / polystyrene resin layer, (m) polyester resin layer / mixed resin layer / polystyrene resin layer / mixed resin layer / polyester resin layer, (n) polystyrene resin layer / mixed resin layer / polyester resin Examples include layer / mixed resin layer / polystyrene resin layer.

As described above, by providing various print layers on the heat-shrinkable film 311, the label base material 31 having the opaque region Y and the colorless or colored transparent region Z is configured.
In FIG. 7, in order to make the transparent area Z easy to understand, the area is shaded. The plain portion in FIG. 7 is an opaque region Y.
7 to 9, the label base material 31 includes a heat-shrinkable film 311, a design printing layer 312, a base printing layer 313, and a sliding printing layer 314.
The design print layer 312 is provided mainly for decoration purposes. The design print layer 312 is a print layer in which display of desired characters, graphics, and the like is represented by one color or two or more colors. The design print layer 312 can be formed by a gravure printing method using a conventionally known color ink. The thickness of the design print layer 312 is, for example, 0.1 μm to 5 μm. In the design print layer 312, the display portion is usually opaque or colored and transparent, but the portion other than the display is transparent.

The base print layer 313 is provided mainly to make the display of the design print layer 312 stand out. The base print layer 313 is a non-patterned print layer in which one color or two or more colors are separately applied, and is an opaque print layer containing an inorganic pigment. Preferably, the base printing layer 313 is an opaque printing layer having no pattern and containing an inorganic pigment. The amount of the inorganic pigment contained in the base print layer 313 is not particularly limited. From the viewpoint of forming an opaque printing layer, the amount of the inorganic pigment contained in the base printing layer 313 is, for example, 20% to 85% by weight, preferably 100% by weight, and preferably 30%. % By weight to 80% by weight, more preferably 40% by weight to 75% by weight.
Examples of the base print layer 313 include a white print layer exhibiting white. The white print layer is a layer containing a white pigment as an inorganic pigment, and the pigment is dispersed in a resin binder and solidified. Examples of the white pigment include amorphous silica, titanium dioxide, calcium carbonate, clay, and talc.
The base printing layer 313 can be formed by a gravure printing method using an ink containing an inorganic pigment such as a white pigment. The thickness of the base printing layer 313 is, for example, 0.3 μm to 5 μm.

The slip printing layer 314 constitutes the innermost surface of the heat-shrinkable cylindrical label 3 and is provided to improve the slipperiness of the inner surface of the heat-shrinkable cylindrical label 3. The sliding print layer 314 is a colorless and transparent or colored and transparent (one color) printing layer, and is a transparent printing layer that does not substantially contain an inorganic pigment. Preferably, the sliding print layer 314 is a colorless and transparent print layer substantially free of inorganic pigment. In this specification, “transparent substantially free of inorganic pigment” means that a small amount of an inorganic pigment component that does not inhibit transparency is allowed to be mixed, and a significant amount that inhibits transparency. Is excluded.
The colorless and transparent sliding printing layer 314 (colorless and transparent printing layer) can be formed by a gravure printing method or the like using an ink (so-called medium ink) that does not substantially contain a conventionally known pigment or dye. The colored and transparent sliding printing layer 314 (colored and transparent printing layer) can be formed by a gravure printing method or the like by blending a slight amount of an organic dye into the medium ink. The thickness of the sliding print layer 314 is, for example, 0.1 μm to 5 μm.

  7 to 9, the design print layer 312 is directly provided on the back surface of the heat-shrinkable film 311. The design print layer 312 may be provided on the front surface side of the heat-shrinkable film 311 or may be provided on each of the front and back surfaces of the heat-shrinkable film 311 (both not shown). When the design print layer 312 is provided on the surface side of the heat-shrinkable film 311, a colorless and transparent print layer may be provided on the surface of the design print layer 312 in order to protect it. The front surface is a surface that becomes the outer side when the label base material 31 is formed into a cylindrical shape, and the back surface is a surface that becomes the inner side.

The design print layer 312 is provided on the heat-shrinkable film 311 except for the back surface of the second side end portion 31b of the heat-shrinkable film 311 and the region where laser cutting is scheduled. The area where the laser cutting is to be performed can be arbitrarily set. For example, as will be described later, the area corresponding to the recess when the heat-shrinkable cylindrical label is attached to the container, and the periphery thereof (periphery 2a, etc.) Is mentioned. However, since the heat-shrinkable cylindrical label 3 is shrunk along the outer shape of the mounting part of the container, the heat-shrinkable cylindrical label 4 after heat shrinking is longitudinal when the mounting part is a non-straight cylinder. The shrinkage rate changes at. Therefore, in consideration of the change in the shrinkage rate, the size and the front view shape of the transparent region Z to be laser cut are set.
The base print layer 313 is provided so as to overlap at least the back side of the design print layer 312. In the illustrated example, the base print layer 313 is provided directly on the back surface of the design print layer 312. When the design print layer 312 is provided only on the front side of the heat-shrinkable film 311, the base print layer 313 is provided on the back surface of the design print layer 312 (between the heat-shrinkable film 311 and the design print layer 312). Or provided directly on the back surface of the heat-shrinkable film 311 corresponding to the design print layer 312.
The slip print layer 314 is provided on the back surface side of the heat-shrinkable film 311 except for the back surface of the second side end portion 31 b of the heat-shrinkable film 311. In the illustrated example in which the design print layer 312 and the base print layer 313 are provided on the back side of the heat-shrinkable film 311, the slip print layer 314 is intended to perform laser cutting on the back side of the base print layer 313. In the region (that is, the region where the design print layer 312 and the base print layer 313 are not provided), the heat shrinkable film 311 is provided across the back surface.

In the label substrate 31, the region where the base print layer 313 is stacked is an opaque region Y, and the region where the base print layer 313 is not stacked is a colorless or colored transparent region Z. In particular, the transparent region Z is preferably colorless and transparent. In the illustrated example, the second side end portion 31b of the heat-shrinkable film 311 (label base material 31) and the region where laser cutting is to be performed are the transparent region Z.
When expressed as a total light transmittance as an index of the transparent region Z, the total light transmittance of the transparent region Z is, for example, 70% or more, preferably 80% or more, and more preferably 90% or more. When the total light transmittance is expressed as an index of the opaque region Y, the total light transmittance of the opaque region Y is, for example, 30% or less, and preferably 20% or less. However, the total light transmittance of the transparent region Z and the opaque region Y is a measurement method based on JIS K 7361 (Testing method for the total light transmittance of plastic-transparent material) using the transparent region Z and the opaque region Y as sample films. The value measured by.

The label base material 31 is rolled into a cylindrical shape so that the lateral direction of the label base material 31 is the circumferential direction, and the back surface of the second side end portion 31b is overlapped and bonded to the surface of the first side end portion 31a. By forming the sealing portion 31c, the heat-shrinkable cylindrical label 3 is configured. The seal portion 31 c extends in a strip shape in the longitudinal direction of the heat-shrinkable cylindrical label 3. In addition, since the printing layer is not provided in the back surface of the 2nd side edge part 31b and the film back surface is exposed, the surface and the 2nd side of the 1st side edge part 31a where the film surface is exposed The back surface of the end portion 31b can be firmly bonded.
The bonding method of the first side end portion 31a and the second side end portion 31b is not particularly limited, and examples thereof include welding using a solvent and bonding using an adhesive.
In addition, although the 2nd side edge part 31b of the label base material 31 was a transparent area | region, the seal | sticker part 31c formed by adhere | attaching the 2nd side edge part 31b to the 1st side edge part 31a which is an opaque area | region. Becomes opaque. Therefore, in the heat-shrinkable cylindrical label 3, the region to be laser cut is the transparent region Z. The transparent region Z is preferably formed at a position corresponding to the recess 2 when the heat-shrinkable cylindrical label 3 is heat-shrink mounted on the container 1. For example, for the container 1 having the first dent 21 and the second dent 22, two transparent regions Z are formed so as to correspond to the dents 21 and 22, respectively.
The perimeter of the heat-shrinkable cylindrical label 3 is, for example, greater than the maximum perimeter of the part to which the container 1 is attached × 1 and less than or equal to 1.5 times, preferably the same × 1.01 to the same ×. 1.3 times, more preferably the same × 1.02 times to the same × 1.15 times. The part to which the container is attached refers to a part of the container where the heat-shrinkable cylindrical label 3 is attached by heat shrinkage.
The heat-shrinkable cylindrical label 3 may be added with a known structure such as a perforation line for cutting (not shown) as necessary.

[Installation process]
The mounting process is a process of mounting the heat-shrinkable cylindrical label 3 on the container 1 by heat-shrinking the heat-shrinkable cylindrical label 3 on the outside of the container 1 and heating it.
Specifically, as shown in FIGS. 10 and 11, a heat-shrinkable cylindrical label 3 formed in a cylindrical shape is placed on the outside of the attachment site of the container 1. Preferably, the heat-shrinkable cylindrical label 3 is packaged so that the transparent region Z covers the recess 2. In FIG. 10, in the heat-shrinkable cylindrical label, the transparent region Z is shaded to make the opaque region Y plain (hereinafter, FIG. 13, FIG. 15, FIG. 16, FIG. 19, FIG. 20, FIG. Same for FIGS. 24 and 26).
As shown in the figure, for example, the mounted portion of the container 1 includes a first dent portion 21 and a second dent portion 22, and most of the main body 11 including an upper reduced diameter portion 111 and a lower reduced diameter portion 112. Etc.
The heat-shrinkable cylindrical label 3 that is larger than the maximum diameter of the mounted portion of the container 1 is not mounted on the container 1 when the container 1 is packaged. That is, the heat-shrinkable cylindrical label 3 can be displaced with respect to the container 1 at the time of exterior packaging.
In addition, when using the heat-shrinkable cylindrical label formed in the cylindrical shape at the same time as the exterior of the container 1, the first side end portion 31 a of the label base material 31 is formed on the outer surface of the container 1 as shown in FIG. 12. The label base 31 is wound in the circumferential direction of the container 1, and the inner surface of the second side end 31b is bonded to the outer surface of the first side end 31a using an adhesive or the like. By bonding, the heat-shrinkable cylindrical label can be packaged on the container 1.

Next, the heat-shrinkable cylindrical label 3 is heated to heat-shrink the heat-shrinkable cylindrical label 3. The heat-shrinkable cylindrical label 3 is reduced in diameter by heat shrinkage and is in close contact with the main body 11 of the container 1 (see FIGS. 13 and 14).
The heating temperature for the heat-shrinkable cylindrical label 3 can be set at a predetermined temperature, and is, for example, 60 ° C to 120 ° C, preferably 80 ° C to 110 ° C, based on the outer surface of the heat-shrinkable cylindrical label 3. It is. The heating means is not particularly limited, and examples thereof include steam and hot air of about 100 ° C to 250 ° C. As other heating means, heating using irradiation of active energy rays such as radiation, ultraviolet rays and infrared rays may be used.

The heat-shrinkable cylindrical label 4 is one of the outer portions of the main body 11 including the upper reduced diameter portion 111, the lower reduced diameter portion 112, and the handle portion 15 except for the outer surfaces of the first recess portion 21 and the second recess portion 22. It adheres substantially to the part or the whole. The heat-shrinkable cylindrical label 4 that has been heat-shrinked is prevented from being inadvertently displaced with respect to the container 1. Hereinafter, of the mounted heat-shrinkable cylindrical label 4, a region that is substantially in close contact with the outer surface of the container 1 (in the illustrated example, the main body 11) is referred to as a “contact region”.
However, due to the nature of the heat-shrinkable cylindrical label 3 that mainly shrinks largely in the circumferential direction, the heat-shrinkable cylindrical label 4 is substantially in close contact with the peripheral edge 2a of the concave portion 2, but the concave portion 2 (from the peripheral edge 2a to the inner side). Are not in close contact with the outer surface of the recess 2). Accordingly, in the mounted heat-shrinkable cylindrical label 4, the region X corresponding to the recessed portion 2 is separated from the outer surface (that is, the peripheral surface 2 b) of the recessed portion 2. Hereinafter, the region corresponding to the recessed portion is referred to as a “recessed portion corresponding region”.
Further, since the heat-shrinkable cylindrical label 3 is externally covered so that the transparent region Z covers the recessed portion 2, the recessed portion corresponding region X and the periphery of the region X are the transparent region Z.
In the illustrated example, the outer edge of the transparent region Z is shown so as to be substantially along the outer side of the peripheral edge 2a of the recessed portion 2. However, the outer edge of the transparent region Z is not recessed exactly as described above. It should be noted that there is a case where the outer edge of the portion 2 protrudes largely outside the peripheral edge 2a, or a case where a part of the outer edge of the transparent region Z enters inside the peripheral edge 2a of the recessed portion 2.

[Cutting process]
The cutting step is a step of cutting the transparent region Z of the heat-shrinkable cylindrical label 4 after mounting on the container 1 in the mounting step using a laser.
A portion to be cut using a laser is an arbitrary portion in the transparent region Z.
The type of laser is not particularly limited as long as it can cut the heat-shrinkable cylindrical label 4, and examples thereof include a carbon dioxide gas laser, a YAG laser, and a YVO ₄ laser.
In particular, the heat-shrinkable cylindrical label 4 (in particular, the heat-shrinkable cylindrical label 4 having a heat-shrinkable film 311 mainly composed of at least one of a polyester-based resin and a polystyrene-based resin) is absorbed by a carbon dioxide laser. Therefore, it is preferable to use a carbon dioxide laser as the laser. The wavelength of the carbon dioxide laser is not particularly limited, and examples thereof include those having a wavelength of 9.4 μm or 10.6 μm, but are particularly suitable for cutting the heat-shrinkable film 311, and therefore have a wavelength of 10.6 μm. It is preferable to use a carbon dioxide laser.

By moving the laser, a cutting line is formed in the surface of the heat-shrinkable cylindrical label 4 according to the movement trajectory of the laser. In the surface of the heat-shrinkable cylindrical label 4, a pair of label edges facing each other with respect to the cutting line is generated. The cutting line is a line generated by laser cutting, and can be said to be a laser movement trajectory.
The cutting line is formed in an endless annular shape. The endless annular front view shape is not particularly limited, and is appropriately set according to the opening to be formed, for example, a substantially circular shape, a substantially elliptical shape, a substantially polygonal shape such as a substantially rectangular shape or a substantially triangular shape, Examples include a daruma shape and a shape obtained by combining these shapes.
When the transparent region Z is irradiated with a laser, the laser beam is not reflected, so that the label base material 31 can be sufficiently cut with the laser. In particular, since the transparent region Z does not substantially contain an inorganic pigment, the laser is not reflected by the inorganic pigment, the laser is sufficiently absorbed by the label base material 31, and a good cutting line is formed on the laser movement locus. It is formed.

The formation of the cutting line (that is, cutting with a laser) may be within the transparent region Z, may be separated from the outer edge of the transparent region Z inward, or may be integrated with all or part of the outer edge of the transparent region Z. You may do it. As will be described later, since a band-shaped transparent label edge surrounding the opening can be formed, it is preferable to perform laser cutting at a location away from the outer edge of the transparent region Z to the inside.
Moreover, since the opening part which leads to the recessed part 2 can be formed in the heat-shrinkable cylindrical label 4, the said laser cutting is a part in the transparent area | region Z, Comprising: It is preferable to perform in the recessed part corresponding | compatible area | region X.

For example, as shown in FIG. 15, laser cutting is performed in an endless ring shape corresponding to the inner periphery of the peripheral edge 2 a of the recess 2. A two-dot chain line in FIG. 15 represents a cutting line W (laser trajectory).
Then, by removing the region surrounded by the cutting line W, the package 10 in which the opening 6 leading to the recess 2 is formed in the heat-shrinkable cylindrical label 4 as shown in FIGS. Can be obtained.
The opening 6 is a portion generated within a range surrounded by the label edge 39. In other words, the label edge portion 39 having an annular shape when viewed from the front surrounds the opening 6. The edge 39a of the label edge 39 is composed of a laser cut mark that has been cut well. The label edge part 39 is comprised from the transparent area | region Z, as shown in FIG.16 and FIG.18. Therefore, the front edge zone annular label edge 39 is colorless or colored and transparent. The width of the transparent portion of the label edge 39 is not particularly limited, but is, for example, 2 mm to 10 mm (that is, the transparent portion forms a belt ring having a width of 2 mm to 10 mm and surrounds the opening 6. )
An opaque area Y exists around the transparent label edge 39. Accordingly, an opaque portion is provided surrounding the transparent label edge 39.
In addition, as shown in the drawing, the package 10 in which the label edge 39 forming the opening 6 substantially extends along the peripheral edge 2a of the container 1 is preferable in appearance, and the handle 15 is put into the hole 16 by inserting a finger. It is preferable because the edge 39a of the label edge 39 is difficult to hit the handle when held.

According to the manufacturing method of the present invention, since cutting is performed using a laser, a desired opening 6 can be easily formed at a desired position of the heat-shrinkable cylindrical label 4.
Furthermore, the heat-shrinkable cylindrical label 4 can be reliably cut with a laser. For this reason, since the region surrounded by the cutting line W by the laser is reliably separated from the heat-shrinkable cylindrical label 4, it can be easily removed, and the edge 39a of the label edge 39 is also beautiful. .
The package 10 of the present invention does not have a small protrusion on the edge 39a of the label edge 39, and the edge 39a is beautiful. In particular, since the label edge 39 having an annular front view surrounding the opening 6 is transparent, the edge 39a of the label edge 39 becomes inconspicuous. Such a package 10 has a good appearance.

<Second production method>
The second manufacturing method is different from the first manufacturing method in that the opening is formed before the heat-shrinkable cylindrical label is attached to the container. Hereinafter, differences from the first manufacturing method will be mainly described, and descriptions of similar configurations will be omitted, and terms and symbols will be used.

[Preparation process and cutting process]
The said container and a heat-shrinkable cylindrical label are prepared.
About a heat-shrinkable cylindrical label, after forming the opening part in the surface of the label base material 31 by cut | disconnecting the inside of the transparent area Z of the label base material 31 using a laser, the label base material 31 is formed in a cylindrical shape, or (B) the label base material 31 is formed in a cylindrical shape, and then the transparent region Z of the label base material 31 is cut using a laser to form an opening. .
As shown in FIG. 19, the heat-shrinkable cylindrical label 3 produced in (A) or (B) has an opening surrounded by the edge 391 a of the label edge portion 391 in the plane of the label base 31. Part 61. FIG. 19 shows a state after removing the region surrounded by the laser cutting line.
As described above, by irradiating the laser in the transparent region Z, the label edge portion 391 that can be sufficiently cut and has a clean edge 391a can be formed. In addition, since a band-shaped transparent label edge 391 surrounding the opening 61 can be formed, it is preferable to perform laser cutting at a location away from the outer edge of the transparent region Z to the inside.

[Installation process]
The heat-shrinkable cylindrical label 3 in which the opening 61 is formed is externally attached to the container 1 and heated, whereby the heat-shrinkable cylindrical label 3 is thermally contracted and attached to the container 1.
Preferably, as shown in FIGS. 20 and 21, the heat-shrinkable cylindrical label 3 is placed on the container 1 so that the opening 61 corresponds to the recess 2.
Thereafter, in the same manner as in the mounting process of the first manufacturing method, by heating the heat-shrinkable cylindrical label 3, the heat-shrinkable cylindrical label 3 is thermally contracted mainly in the lateral direction, and accordingly, the label edge 391. (See FIG. 16 and FIG. 17), for example, a package 10 having an opening 6 as shown in FIG. 16 is obtained.
In order to obtain the package 10 having the opening 6 in which the label edge 39 is substantially along the peripheral edge 2a of the container 1 as shown in FIGS. It is necessary to control the degree of expansion of the label edge portion 391 when heat-shrinking the shape setting and heat-shrinkable cylindrical label 3, but such setting and control are difficult. Therefore, when manufacturing the package 10 which has the opening part 6 along such a periphery 2a substantially, a 1st manufacturing method is preferable.

<Modifications of the first and second manufacturing methods and the package>
In the first and second manufacturing methods, the container 1 in which the hole 16 is penetrated between the first dent portion 21 and the second dent portion 22 is illustrated, but for example, as shown in FIGS. Even if the packaging body 10 which has the opening part 6 is manufactured by mounting | wearing with the container 1 in which the 1st dent part 21 and the 2nd dent part 22 which have the bottom face 2c are formed in the container 1 are attached. Good. Thus, also in the 1st dent part 21 and the 2nd dent part 22 which have the bottom face 2c, the handle part 15 is formed adjacent to it.
Further, the container 1 is not limited to the container 1 having the handle portion 15 and the dent portion 2, and for example, as shown in FIGS. 24 and 25, the heat-shrinkable cylindrical label 4 is attached to the container 1 having no handle portion and dent portion. You may manufacture the package 10 which has the opening part 6 by mounting | wearing.

Moreover, in the said 1st and 2nd manufacturing method, in the transparent area | region Z of the heat-shrinkable cylindrical labels 3 and 4 or the label base material 31, a transparent printing layer (sliding printing layer) is used for the transparent heat-shrinkable film 311. 314, etc.) are provided, but the transparent region Z may be composed of only the transparent film 311 (not shown).
Furthermore, in the said 1st and 2nd manufacturing method, although the transparent region Z of the heat-shrinkable cylindrical labels 3 and 4 or the label base material 31 is formed in the substantially ellipse shape by the front view, it is not limited to this. Further, it may be formed in a range such as a substantially circular shape or a substantially polygonal shape such as a substantially quadrangular shape (not shown).
Further, an opaque region Y may be formed in the range of the transparent region Z of the heat-shrinkable cylindrical labels 3 and 4 or the label substrate 31. For example, as shown in FIG. 26, a heat-shrinkable cylindrical label 3 made of a label base material 31 having an opaque region Y smaller than the area of the transparent region Z in the range of the transparent region Z may be used.

DESCRIPTION OF SYMBOLS 1 Container 2 Recessed part 2a Periphery of a recessed part 3 Heat-shrinkable cylindrical label before heat shrinkage 4 Heat-shrinkable tubular label 39 after heat shrinkage 39,391 Label edge part 6,61 Opening part 10 Packaging body Y opaque area ( Opaque part)
Z transparent area (transparent part)

Special table 2003-509298 gazette

Claims (5)

A mounting process in which a heat-shrinkable cylindrical label in which a label base material having an opaque region and a colorless or colored transparent region is formed in a cylindrical shape is mounted on a container by heat shrinking,
A cutting step of forming an opening in the heat-shrinkable tubular label by cutting the inside of the transparent region of the heat-shrinkable tubular label after mounting using a laser,
The manufacturing method of the package which has. Before or after producing a heat-shrinkable cylindrical label in which a label base material having an opaque region and a colorless or colored transparent region is formed into a cylindrical shape, the transparent region of the label base material is subjected to a laser. Cutting step of forming an opening by cutting using
A mounting step of mounting the container on the container by heat shrinking the heat-shrinkable cylindrical label in which the opening is formed,
The manufacturing method of the package which has this. As the container, preparing a container having a recessed portion in which a part of the outer surface is recessed inward,
In the mounting step, the heat-shrinkable cylindrical label is mounted on a container covering the recess.
The manufacturing method of the package body of Claim 1 cut | disconnected including the area | region corresponding to the said recessed part of the said heat-shrinkable cylindrical label in the said cutting process. The transparent area is surrounded by the opaque area;
The manufacturing method of the package as described in any one of Claims 1 thru | or 3 with which the white printing layer is provided in the said opaque area | region. A container having a recess, and a heat-shrinkable cylindrical label that is heat-shrink mounted including the recess of the container,
In the surface of the heat-shrinkable cylindrical label, an opening leading to the recess is formed,
The label edge forming the opening is colorless or colored and transparent,
The package body which is provided with the opaque part surrounding the said label edge part.

Images