JP2017171357A - Method for production of package body - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a production method for obtaining a package body by cutting a heat-shrinkable cylindrical label into a desired shape using a laser to form an opening to the label without substantially damaging a container.SOLUTION: An objective method for production of a package body comprises: a loading process of loading a heat-shrinkable cylindrical label formed from a heat-shrinkable film including at least one of polyester and polystyrene resins as a main component on the outside of a container having an olefinic surface whose outer surface part is formed from a polyolefin resin; and a cutting process of cutting by using a laser, one portion of the area corresponding to the olefinic surface among the heat-shrinkable cylindrical label after loading.SELECTED DRAWING: Figure 12

Description

  The present invention relates to a method for manufacturing a package in which a heat-shrinkable cylindrical label having a desired opening is mounted on a container.

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.
In one method, the package is preliminarily cut out of a part of the heat-shrinkable cylindrical label, and the heat-shrinkable cylindrical label is formed while matching the cutout of the heat-shrinkable cylindrical label with the recess. It is obtained by covering the container and heat shrinking ([0018] of the same document).
In another method, the package is formed by notching a portion of the heat-shrinkable cylindrical label corresponding to the recessed portion after heat-shrinking the heat-shrinkable cylindrical label and attaching it to the container. can get. As a method for cutting out the heat-shrinkable cylindrical label, die cutting, laser cutting, or the like is used ([0017] of the same document).

In the method of cutting out a part of the heat-shrinkable cylindrical label in advance, it is difficult to externally attach the heat-shrinkable cylindrical label to the container while aligning the cutout with the recessed portion of the container. . Furthermore, in this method, the heat-shrinkable cylindrical label sheathed on the container is heat-shrinked so that the notch is expanded and an opening is generated, but the size of the opening is larger than the periphery of the recess, Alternatively, the label edge forming the opening often warps outward. Such a package has a poor appearance and cannot be distributed as a product.
Of the methods for cutting out a part of the heat-shrinkable cylindrical label after being mounted on the container, die cutting requires manufacturing a die (blade type) for each shape of the opening to be formed. Depending on the shape, the heat-shrinkable cylindrical label attached thereto may not be cut by die cutting. In this respect, laser cutting does not require the production of a die and can easily cut a desired portion.
However, when cutting with a laser, the outer surface of the container may be damaged by the laser.

Special table 2003-509293 gazette

  An object of the present invention is to provide a package having an opening by cutting the heat-shrinkable cylindrical label into a desired shape using a laser without substantially damaging the container on which the heat-shrinkable cylindrical label is mounted. It is to provide a method of manufacturing a body.

  The manufacturing method of the package of the present invention includes a heat shrinkable film mainly comprising at least one of a polyester resin and a polystyrene resin on the outside of a container having an olefin surface portion whose outer surface portion is formed of a polyolefin resin. A mounting step of mounting the formed heat-shrinkable cylindrical label; and a cutting step of cutting a part of the region corresponding to the olefin surface portion of the heat-shrinkable cylindrical label after mounting using a laser.

In a preferred method for producing a package according to the present invention, a container having a recessed portion with a part of its outer surface recessed inward is used as the container, and in the mounting step, the heat-shrinkable cylindrical label covers the recessed portion. Then, in the cutting step, cutting is performed using the laser so that an opening leading to the recess is formed in the surface of the heat-shrinkable cylindrical label.
In a preferable method for producing a package of the present invention, a heat-shrinkable cylindrical label having a shrinkage stress of 10 MPa or less is used as the heat-shrinkable cylindrical label.
The manufacturing method of the preferable package of this invention contains the area | region which the part cut | disconnected with a laser closely_contact | adhered to the outer surface of the said container of the said heat-shrinkable cylindrical label in the said cutting process.
In a preferred method for producing a package of the present invention, the heat-shrinkable film is an outer surface layer / a laminated film having one or more intermediate layers / inner surface layers, and the outer surface layer and the inner surface layer are formed of a polyester resin layer. The intermediate layer includes at least one of a mixed resin layer containing a polyester resin and a polystyrene resin and a polystyrene resin layer.

  According to the method for manufacturing a package of the present invention, a package in which a heat-shrinkable cylindrical label having a desired opening formed at a desired location is attached to a container can be easily manufactured. The package container is not substantially damaged by the laser and is beautiful in appearance.

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 front view which shows the state which armored the heat-shrinkable cylindrical label in the mounting | wearing process. The expanded sectional view cut | disconnected by the VIII-VIII line of FIG. In an attachment process, an expanded sectional view showing the middle of covering a heat-shrinkable cylindrical label concerning a modification to a container. The front view which shows the state which heat-shrinked the heat-shrinkable cylindrical label and was mounted | worn in the container in the mounting process. The expanded sectional view cut | disconnected by the XI-XI line of FIG. The front view which is the 1st example of a cutting process, and shows the state which cut | disconnected the mounted heat-shrinkable cylindrical label with the laser. The front view which shows the state after removing the area | region enclosed with the cutting line produced by cutting | disconnection in a 1st example (front view of the package of a 1st example). The expanded sectional view cut | disconnected by the XIV-XIV line | wire of FIG. Front view showing the state after cutting the attached heat-shrinkable cylindrical label with a laser and removing the area surrounded by the cutting line (front side of the package of the second example) Figure). A front view showing the state after cutting a mounted heat-shrinkable cylindrical label with a laser and removing a region surrounded by a cutting line (front side of the packaging body of the third example). Figure). The expanded sectional view cut | disconnected by the XVII-XVII line of FIG. A front view showing a state after cutting a mounted heat-shrinkable cylindrical label with a laser and removing a region surrounded by a cutting line (front side of the packaging body of the fourth example). Figure). Rear view The expanded sectional view cut | disconnected by the XX-XX line of FIG. The front view of the package using the container of a modification (front view of the package of the 5th example). The expanded sectional view cut | disconnected by the XXII-XXII line | wire of FIG. The front view of the package using the container of a modification (front view of the package of the 6th example). The expanded sectional view cut | disconnected by the XXIV-XXIV line | wire of FIG.

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 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 parts and members shown in the drawings may be different from the actual ones.

The method for producing a package of the present invention mainly uses a laser for a step (mounting step) of mounting a heat-shrinkable cylindrical label on the outside of a container, and a part of the heat-shrinkable cylindrical label after the mounting. And a step of cutting (cutting step). The manufacturing method of this invention may have 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.

[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 manufacturing such a package, the container and the heat-shrinkable cylindrical label are prepared.

(container)
A container will not be specifically limited if the outer surface part has a olefin surface part currently formed from polyolefin resin.
In other words, from the viewpoint of the material of the container, the portion constituting the outer surface of the container (this portion is the outer surface portion) has a portion formed of a polyolefin-based resin (this portion is referred to as the olefin surface portion). doing. Therefore, as for the 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.
It is sufficient that at least the outer surface portion of at least one of the main body 11 and the lid portion 13 has an olefin surface portion formed of a polyolefin resin. Preferably, at least the outer surface portion of the main body 11 is made of a polyolefin resin. Is formed.
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 single-layer structure is entirely formed of a polyolefin-based resin. The 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. Thus, in the main body 11b having a two-layer structure, at least the outer surface portion A is formed of a 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. Examples of materials other than polyolefin resins include synthetic resins other than polyolefin resins, metals, glass, and ceramics.
FIG. 5C shows a main body 11c having a three-layer structure. Thus, in the main body 11c having a three-layer structure, at least the outer surface portion A is formed from a 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 addition, although the laminated structure of the main body 11 which has an olefin surface part is illustrated in FIG. 5, it is the same also when the cover part 13 has an olefin surface part.
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 polyethylene resin is a polymer composed of ethylene as an essential monomer component, that is, a polymer containing at least a structural unit derived from ethylene in the molecule (in one molecule). Examples of the polyethylene-based resin include ethylene homopolymers; copolymers composed of ethylene and one or more monomer components (monomer components other than ethylene) as essential monomer components (ethylene copolymer). Polymer) and the like.
Examples of the monomer component other than ethylene include α-olefins other than ethylene; vinyl monomers such as vinyl chloride; (meth) acrylic acid, maleic acid, fumaric acid, crotonic acid, itaconic acid, citraconic acid, 5 -Unsaturated carboxylic acids such as norbornene-2,3-dicarboxylic acid; unsaturated carboxylic anhydrides such as maleic anhydride, citraconic anhydride, 5-norbornene-2,3-dicarboxylic anhydride, tetrahydrophthalic anhydride; Methyl) methacrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, 2-hydroxyethyl (meth) acrylate, (meth) acrylic 3-hydroxypropyl acid, glycidyl (meth) acrylate, monoethyl maleate, male Unsaturated carboxylic acid esters such as diethyl acrylate; unsaturated amides or imides such as acrylamide, methacrylamide, and maleimide; unsaturated carboxylic acid salts such as sodium (meth) acrylate and zinc (meth) acrylate; vinyl acetate and the like Can be mentioned. Only one type of monomer component other than ethylene may be used, or two or more types may be used.
Examples of the α-olefin include carbon numbers such as propylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, and 1-decene. 4-20 alpha olefins (preferably alpha olefins having 4-8 carbon atoms) and the like can be mentioned. Only 1 type may be used for the said alpha olefin, and 2 or more types may be used for it.
Density of the polyethylene resin is not particularly limited, but is preferably 0.89~0.97g / cm ^3, more preferably 0.91~0.96g / cm ^3.

  The polypropylene resin is not particularly limited. For example, a propylene homopolymer (homopolypropylene); a copolymer composed of propylene and one or more olefins (olefins other than propylene) as essential monomer components. Examples thereof include a blend (propylene copolymer). The propylene copolymer is a copolymer containing at least a structural unit derived from propylene and a structural unit derived from an olefin other than propylene (for example, an α-olefin other than propylene) in the molecule (in one molecule). The propylene-α-olefin copolymer is a copolymer containing at least a structural unit derived from propylene and a structural unit derived from an α-olefin other than propylene in the molecule (in one molecule). Examples of the α-olefin used as a copolymerization component of the propylene-α-olefin copolymer include ethylene, 1-butene, 1-pentene, 4-methyl-1-pentene, 1-hexene, and 1-heptene. , 1-octene, 1-nonene, 1-decene, etc., and an α-olefin having 2 to 20 carbon atoms (excluding propylene). Only 1 type may be used for the said alpha olefin, and 2 or more types may be used for it. The propylene copolymer (propylene-α-olefin copolymer or the like) may be a block copolymer, a random copolymer, or a graft copolymer.

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.
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.
Further, the outer shape of the main body 11 may be a straight body shape or may not be a straight body shape. The straight barrel shape refers to a shape whose circumferential length does not change 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 shape of the periphery 2a 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.

The thickness of the handle portion 15 may be substantially the same as that of the main body 11 or may be different. As illustrated, the container 1 in which the main body 11 and the handle portion 15 are integrally formed is usually formed by a molding method such as injection molding or blow molding. Thickness may vary. For example, the handle portion 15 has a thickness of 0.2 mm to 1.2 mm, preferably 0.3 mm to 1 mm.
The height of the handle portion 15 (length of the handle portion in the axial direction of the container) is not particularly limited, but is 50 mm or more, preferably 50 mm to 200 mm, more preferably from the viewpoint of holding by hand. Is 60 mm to 120 mm.
Furthermore, when it has the hole part 16 like the example of illustration, the handle part 15 is isolate | separated from the main body 11, and the magnitude | size in the cross sectional view of the handle part 15 is not specifically limited. From the viewpoint of ease of holding and strength, the size of the handle portion 15 in cross-sectional view is 10 mm to 50 mm in diameter, preferably 15 mm to 40 mm, based on the case where the handle portion is substantially circular in cross section. . However, since the outer shape of the handle portion 15 is not limited to the substantially circular shape in cross section, the size of the handle portion 15 when the handle portion 15 is different from the substantially circular shape in cross section is Assuming a circle with the same area as the area, this corresponds to the diameter of the assumed circle.
The handle portion 15 is not limited to being formed integrally with the main body 11, and a handle portion and a hole portion may be formed by attaching a separate handle portion to the main body (not shown). ). When the handle portion is formed separately from the main body, the handle portion and the main body may be made of the same material or different from the viewpoint of the material.

  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.

The label base 31 is mainly composed of a heat-shrinkable film. The label base material 31 may be provided with a design printing layer, a protective layer, a sliding layer, and the like on the heat-shrinkable film as necessary.
The heat-shrinkable film is a flexible film 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.
Although the thickness of the heat-shrinkable film is not particularly limited, for example, a film having a thickness of about 20 μm to 100 μm, further about 20 μm to 80 μm can be used.

As the heat-shrinkable film, a heat-shrinkable film mainly containing at least one of a polyester resin and a polystyrene resin is used from the viewpoint of material.
The main component resin of the heat-shrinkable film is a polyester resin, a polystyrene resin, or a mixed resin of a polyester resin and a polystyrene resin.
The heat-shrinkable film may have a single-layer structure or a laminated film having a multilayer structure of two or more layers. When the heat-shrinkable film is composed of a multilayer laminated film, as long as it has heat-shrinkability as a whole, it may be a laminate of a layer having heat-shrinkability and a layer not having heat-shrinkage, All layers are laminates having heat shrinkability.
When the heat-shrinkable film is composed of a multilayer laminated film, these layers are each independently a layer mainly composed of a polyester resin (hereinafter referred to as a polyester resin layer) and a polystyrene resin as a main component. It is selected from a layer (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 layer).
When the heat-shrinkable film is composed of a laminated film of two layers, it is a laminated film of outer surface layer / inner layer, and when the heat-shrinkable film is composed of a laminated film of three or more layers, outer layer / one or more intermediate layers / It is a laminated film of an inner surface layer.
In particular, in a laminated film composed of an outer surface layer / an intermediate layer of one or more layers / an inner surface layer, the outer surface layer and the inner surface layer are composed of a polyester resin layer, and at least one of a mixed resin layer and a polystyrene resin layer as the intermediate layer Those containing one are preferred.
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.

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.

  The polyester resin is not particularly limited, but is preferably a polyethylene terephthalate resin. As the polyethylene terephthalate resin, polyethylene terephthalate (PET) using terephthalic acid as a dicarboxylic acid component, ethylene glycol as a diol component; terephthalic acid as a dicarboxylic acid component, ethylene glycol as a diol component as a main component, 1 Copolyester (CHDM copolymerized PET) using 1,4-cyclohexanedimethanol (CHDM) as a copolymer component, terephthalic acid as a dicarboxylic acid component, ethylene glycol as a main component as a diol component, neopentyl glycol (NPG) Polyester (NPG copolymerized PET) using terephthalic acid as a dicarboxylic acid component, ethylene glycol as a main component as a diol component, diethylene glycol Diol-modified PET such as copolyester used as copolymerization component; dicarboxylic acid component, dicarboxylic acid-modified PET modified with isophthalic acid and / or adipic acid with terephthalic acid as the main component; both dicarboxylic acid component and diol component And modified dicarboxylic acid and diol-modified PET. Among these, modified PET having a copolymer component such as diol-modified PET, dicarboxylic acid-modified PET, dicarboxylic acid, and diol-modified PET is preferable.

  Examples of the polystyrene resin include homopolymers or copolymers of styrene monomers such as general polystyrene (GPPS) which is a styrene homopolymer; styrene monomers are graft-polymerized on synthetic rubber High impact polystyrene (HIPS); a copolymer consisting of a styrene monomer and a diene monomer (conjugated diene) such as butadiene or isoprene, represented by a styrene-butadiene block copolymer (SBS, etc.) A styrene-conjugated diene copolymer; a styrene-polymerizable unsaturated carboxylic acid ester copolymer that is a copolymer of a styrene monomer and a (meth) acrylic acid ester monomer; a styrene-conjugated diene Polymerizable unsaturated carboxylic acid ester copolymer; copolymer of styrene monomer and (meth) acrylic acid ester monomer Graft polymerization was clear and high impact polystyrene (graft HIPS), and mixtures thereof and the like in. In these, it is preferable that a styrene-conjugated diene copolymer is included as a predetermined polystyrene resin. This styrene-conjugated diene copolymer contains the hydrogenated product.

  Although it does not specifically limit as said (meth) acrylic-ester type monomer, For example, methyl acrylate, ethyl acrylate, propyl acrylate, n-butyl acrylate, 2-ethylhexyl acrylate, methyl methacrylate, methacryl Examples include ethyl acetate, propyl methacrylate, butyl methacrylate, 2-ethylhexyl methacrylate, lauryl methacrylate, stearyl methacrylate, and the like. The (meth) acrylic acid ester monomer can be used alone or in combination of two or more. The (meth) acryl means methacryl or acryl.

  Although it does not specifically limit as said styrene-type monomer, For example, styrene, alpha-methyl styrene, m-methyl styrene, p-methyl styrene, p-ethyl styrene, p-isobutyl styrene, pt-butyl styrene, Examples include chloromethylstyrene. Among these, styrene is particularly preferable from the viewpoint of physical properties such as strength and moldability. In addition, these styrenic monomers may be used independently and may use 2 or more types together.

  The conjugated diene is not particularly limited. For example, 1,3-butadiene, isoprene (2-methyl-1,3-butadiene), 2,3-dimethyl-1,3-butadiene, 1,3-pentadiene, Examples include 1,3-hexadiene and chloroprene. Among these, 1,3-butadiene and isoprene are particularly preferable from the viewpoints of improving brittleness and imparting flexibility. In addition, these conjugated dienes may be used independently and may use 2 or more types together.

  The form of copolymerization of the styrene-conjugated diene copolymer is not particularly limited, such as a random copolymer, a block copolymer, and an alternating copolymer, but a block copolymer is preferable, and a styrene (S) -conjugated diene is preferred. Block (D) type, SDS type, DSD type, SDS type, etc. are mentioned.

Examples of the styrene-conjugated diene copolymer include a hydrogenated or non-hydrogenated styrene-butadiene block copolymer, a hydrogenated or non-hydrogenated styrene-isoprene block copolymer, a hydrogenated or non-hydrogenated copolymer. Examples thereof include styrene-butadiene-isoprene block copolymers. Of these, hydrogenated or non-hydrogenated styrene-butadiene block copolymers are preferred. Said hydrogenation means “hydrogenated” and non-hydrogenated means “not hydrogenated”.
Examples of the hydrogenated or non-hydrogenated styrene-butadiene block copolymer include styrene-butadiene block copolymer (SBS), styrene-ethylene-butylene-styrene block copolymer (SEBS), and styrene-butadiene-butylene- Styrene copolymer (SBBS) etc. are illustrated.

As the heat-shrinkable film, from the viewpoint of thermal properties, a film that mainly heat-shrinks at least in the first direction may be used, and a film that slightly heat-shrinks or heat-extends in the second direction may be used. The first direction means one direction in the plane of the film, and the second direction is a direction orthogonal to the first direction in the plane. 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 first direction of the heat-shrinkable film is the heat-shrinkable cylindrical label. 3 circumferential direction. As such a heat-shrinkable film, a uniaxially stretched or biaxially stretched film mainly stretched in the first direction can be used.
The heat shrinkage rate in the first direction (heat shrink direction) of the heat shrinkable film is not particularly limited, but is preferably 40% or more, more preferably 50% or more, and further preferably 60% or more. . The larger the heat shrinkage rate in the first direction, the better. However, since there is a limit to it, the heat shrinkage rate in the first direction is theoretically less than 100%, but usually 90% or less. It is. When the heat-shrinkable film is a film that changes heat in the second direction, the heat shrinkage rate in the second direction is, for example, −3 to 25%, preferably 1 to 20%. The minus of the thermal contraction rate means thermal elongation.
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.
Thermal contraction rate (%) = [{(original length in first direction or second direction) − (length after immersion in first direction or second direction)} / (first direction or second direction Original length)] × 100.

Further, the shrinkage stress of the heat-shrinkable film is not particularly limited. However, when the heat-shrinkable cylindrical label 3 is attached to the container 1, the deformation of the handle portion 15 of the container 1 can be prevented. Small is preferable. For example, the shrinkage stress of the heat-shrinkable film is 10 MPa or less, preferably 8 MPa or less, more preferably 6 MPa or less.
On the other hand, if the shrinkage stress is too small, the heat-shrinkable cylindrical label 3 does not sufficiently adhere to the container 1 and the heat-shrinkable cylindrical label after mounting may be idle. The stress is, for example, 1 MPa or more, preferably 2 MPa or more.
The shrinkage stress of the heat-shrinkable film was cut to 80 mm in the first direction and 15 mm in the second direction, and both ends of the film piece in the first direction were held on the chuck of the stress measuring device (distance between chucks). 50 mm), the maximum value of the shrinkage stress in the first direction that occurs when this is immersed in warm water of 100 ° C. for 10 seconds.

In addition, the design printing layer provided as needed is laminated | stacked on the inner surface or / and outer surface of the said heat-shrinkable film. The heat-shrinkable film may be either transparent or non-transparent, but the inner surface side of the film (the inner surface of the heat-shrinkable film is a surface that becomes the inner side when the label substrate 31 is formed into a cylindrical shape, When the design printing layer is provided on the outer surface of the heat-shrinkable film), a film having excellent transparency is used. In the present specification, transparent (colorless transparent or colored transparent) refers to a case where the total light transmittance is 70% or more, preferably 80% or more, 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).
Even in the case where such a design print layer or the like is provided on the heat-shrinkable film, the label base 31 is mainly formed in the first direction (the circumferential direction of the heat-shrinkable cylindrical label 3) by the shrinkage force of the heat-shrinkable film. ) Heat shrink.

The label base material 31 is rolled into a cylindrical shape so that the first direction (heat shrinkage direction) of the label base material 31 is the circumferential direction, and the first side end portion 31a is overlapped with the second side end portion 31b. The heat-shrinkable cylindrical label 3 is configured by bonding to form the seal portion 31c. The seal portion 31 c extends in a strip shape in the axial direction of the heat-shrinkable cylindrical label 3.
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.
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. 7 and 8, 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 externally covered so as to cover at least one recess 2.
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 a cylindrical shape at the same time as the exterior of the container 1, as shown in FIG. 9, the first side end 31 a of the label base material 31 is formed on the outer surface of the container 1. 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. 10 and 11). In the illustrated example, the heat-shrinkable cylindrical label 4 is formed on 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 recessed portion 21 and the second recessed portion 22. It is in close contact with a part or the whole of the outing part. 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”. In addition, in FIG. 10, in order to easily show the dent corresponding region, innumerable dots are added to the region for convenience.

In the mounting step, 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. with reference to the outer surface of the heat-shrinkable cylindrical label 3, preferably 80 ° C to 110 ° C. 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.
As described above, when the heat-shrinkable cylindrical label 3 is heat-shrink mounted on the container 1 having the handle portion 15 partitioned from the main body 11 through the hole portion 16, the handle portion 15 is deformed ( For example, it may be crushed inside). In this regard, when the heat-shrinkable cylindrical label 3 having a shrinkage stress of 10 MPa or less is used, such deformation of the handle portion 15 can be effectively prevented. In particular, the handle portion 15 is formed of (a) a polyolefin-based resin (a) having a diameter in the above-described sectional view of 10 mm to 50 mm, (b) a thickness of 0.2 mm to 1.2 mm. The hollow handle portion 15 satisfying at least one of the three constitutions (formed from a material mainly composed of polyolefin resin) is easily deformed when the heat-shrinkable cylindrical label is heat-shrinked. However, by using the heat-shrinkable cylindrical label 3 having the shrinkage stress, the deformation can be effectively prevented.

[Cutting process]
The cutting step is a step of cutting a part of the surface of the heat-shrinkable cylindrical label 4 after mounting on the container 1 in the mounting step using a laser.
The portion to be cut using a laser is within the range of the region corresponding to the olefin surface portion of the container 1 in the heat-shrinkable cylindrical label 4. Hereinafter, the region corresponding to the olefin surface portion of the container 1 in the heat-shrinkable cylindrical label 4 may be referred to as “olefin corresponding region”. Since the olefin surface portion is not substantially damaged by the laser, a part of the heat-shrinkable cylindrical label 4 corresponding to the olefin surface portion is cut.
In the illustrated example, the entire outer surface portion of the main body 11 is composed of an olefin surface portion, and the heat-shrinkable cylindrical label 4 is attached only to the main body 11. The whole is an olefin compatible region.

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, a heat-shrinkable film containing at least one of a polyester-based resin and a polystyrene-based resin as a main component has a large absorption amount of a carbon dioxide laser, and 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, and are particularly suitable for cutting the heat-shrinkable film. It is preferable to use a carbon dioxide laser.

You may cut | disconnect any location of this olefin corresponding | compatible area | region. The shape of the cutting line is not particularly limited. For example, an endless annular shape in front view, one linear shape having both ends in front view, or two or more linear shapes having both ends in front view are intermittent. The continuous shape etc. are mentioned. A perforated line shape or the like corresponds to a shape in which two or more linear shapes having both end portions are intermittently continuous. The cutting line is a line generated by laser cutting, and can be said to be a laser movement trajectory.
When the cutting line is formed in an endless ring shape when viewed from the front, the region surrounded by the annular cutting line is separated and independent from the heat-shrinkable cylindrical label 4, so that the region is removed. .
Moreover, in the container 1 which has the dent part 2, it is preferable to cut | disconnect so that the range including a part or all of the dent part corresponding | compatible area | region X may be punched out. By forming an endless annular cutting line including part or all of the recess corresponding region X, an opening leading to the recess 2 can be formed in the heat-shrinkable cylindrical label 4.

The formation of the cutting line (that is, the portion to be cut using a laser) may be (1) only within the range of the close contact region, (2) only within the range of the recess corresponding region, and (3) the recess corresponding region. It may be continuous with a part of the contact area and a part of the contact area. Preferably, as in the above (1) and (3), cutting is performed using a laser including a close contact region. In addition, it is preferably cut using a laser so that an opening leading to the recess 2 is formed in the surface of the heat-shrinkable cylindrical label 6.
For example, as shown in FIG. 12, the cutting line Z may be formed corresponding to the peripheral edge 2 a of the recess 2. A two-dot chain line in FIG. 12 represents a cutting line Z (laser trajectory). When the surface of the heat-shrinkable cylindrical label 4 is cut along the peripheral edge 2a, an endless annular cutting line Z is formed. In addition, since the heat-shrinkable cylindrical label 4 is substantially in close contact with the outer surface of the going-out portion of the container 1 including the peripheral edge 2a, the formation of the cutting line Z is the case of the above (1).
And the package 10 by which the opening part 6 which leads to the dent part 2 was formed in the heat-shrinkable cylindrical label 4 as shown in FIG.13 and FIG.14 by removing the area | region enclosed by the said cutting line Z. FIG. Can be obtained. The opening 6 is a portion generated within the range surrounded by the film edge 4a. The said film edge 4a is comprised from a laser cutting trace. Such a package 10 has a film edge 4a forming the opening 6 along the peripheral edge 2a of the container 1 and is preferable in appearance.

Moreover, the example shown in FIG. 15 has shown the case where a cutting line is formed in an endless cyclic | annular form corresponding to the outer periphery of the peripheral edge 2a of the dent part 2. FIG. FIG. 15 shows a state after removing the region surrounded by the cutting line. The formation of this cutting line is also the case of (1) above.
Also in this case, the package 10 in which the opening 6 leading to the recess 2 is formed in the heat-shrinkable cylindrical label 4 can be obtained, but the shape of the film edge 4a forming the opening 6 is the peripheral shape. It is larger than the front view shape of 2a.

Moreover, the example shown in FIG.16 and FIG.17 has shown the case where a cutting line is formed in an endless annular shape corresponding to the inner periphery of the peripheral edge 2a of the dent part 2. FIG. 16 and 17 show a state after removing the region surrounded by the cutting line. The formation of this cutting line is the case of (2) above.
Also in this case, the package 10 in which the opening 6 leading to the recess 2 is formed in the heat-shrinkable cylindrical label 4 can be obtained, but the shape of the film edge 4a forming the opening 6 is the peripheral shape. It is smaller than the front view shape of 2a.

Further, in the examples shown in FIGS. 18 to 20, the cutting line is divided into the inner periphery of the left peripheral edge 2 a 1 of the first recess 21, the inner periphery of the right peripheral edge 2 a 2 of the second recess 22, the first recess 21 and The case where it forms in an endless cyclic | annular form from the up-and-down periphery 2a3, 2a4 of the 2nd dent part 22 to the area | region corresponding to the going out part of the container 1 is illustrated. 18 to 20 show a state after the region surrounded by the cutting line is removed. The formation of this cutting line is the case of (3) above. That is, in the heat-shrinkable cylindrical label 4, the region corresponding to the inner periphery of the left peripheral edge 2a1 of the first recess 21 and the inner periphery of the right peripheral edge 2a2 of the second recess 22 is a recess corresponding region. A region corresponding to the outing portion of the container 1 is a close contact region.
Also in this case, it is possible to obtain the package 10 in which the opening 6 leading to the recess 2 is formed in the heat-shrinkable cylindrical label 4. In particular, the opening 6 includes the handle portion 15 and is formed corresponding to the first recess portion 21 and the second recess portion 22, so that the package 10 with the handle portion 15 exposed is obtained.

According to the manufacturing method of the present invention, since the laser is used after the label is mounted, the desired opening 6 can be easily formed at the desired position of the heat-shrinkable cylindrical label 4.
Further, the heat-shrinkable cylindrical label 4 is formed of a heat-shrinkable film mainly composed of at least one of a polyester resin and a polystyrene resin, and these resins have excellent laser absorption ability. Since it has an olefin surface portion made of a polyolefin-based resin that is not easily damaged by laser, when the laser is irradiated to a part of the region corresponding to the olefin surface portion of the container 1 of the heat-shrinkable cylindrical label 4 after mounting, the container 1 is substantially The heat-shrinkable cylindrical label 4 can be cut surely and satisfactorily without damaging it.
As described above, according to the manufacturing method of the present invention, the heat-shrinkable cylindrical label 4 is surely cut, and the packaging body 10 in which the desired opening 6 is formed in the heat-shrinkable cylindrical label 4 is provided. The package 10 having a beautiful outer surface 1 can be easily manufactured.

In the said embodiment, although the container 1 by which the hole 16 was penetrated between the 1st dent part 21 and the 2nd dent part 22 was illustrated, for example, as shown in FIG.21 and FIG.22, it has the bottom face 2c. The package 10 may be manufactured by attaching a heat-shrinkable cylindrical label to the container 1 in which the first dent 21 and the second dent 22 are formed. 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 present invention is not limited to the container 1 having the handle portion 15 and the recessed portion 2, and for example, as shown in FIGS. 23 and 24, the container 1 having no handle portion and the recessed portion is provided with a heat-shrinkable cylinder. The package 10 may be manufactured by mounting the label 4 and cutting the heat-shrinkable cylindrical label 4 with a laser to form the opening 6.

DESCRIPTION OF SYMBOLS 1 Container 15 Handle part 2 Recessed part 2a Periphery of a recessed part 3 Heat-shrinkable cylindrical label before heat shrink 4 Heat-shrinkable tubular label after heat shrink 4a Film edge (laser cutting trace)
6 Opening 10 Package

Special table 2003-509298 gazette

Claims (5)

A heat-shrinkable cylindrical label formed from a heat-shrinkable film mainly composed of at least one of a polyester-based resin and a polystyrene-based resin on the outside of a container having an olefin surface portion whose outer surface portion is formed of a polyolefin-based resin. Installation process to install,
A cutting step of cutting a part of the region corresponding to the olefin surface portion of the heat-shrinkable cylindrical label after mounting using a laser,
The manufacturing method of the package which has. As the container, a container having a recessed portion with a part of its outer surface recessed inward,
In the mounting step, the heat-shrinkable cylindrical label is mounted on the container so as to cover the recess.
The manufacturing method of the package body of Claim 1 cut | disconnected using the said laser so that the opening part which leads to the said recessed part may be formed in the surface of the said heat-shrinkable cylindrical label in the said cutting process.   The manufacturing method of the package body of Claim 1 or 2 using the heat-shrinkable cylindrical label whose shrinkage stress is 10 Mpa or less as the said heat-shrinkable cylindrical label.   In the said cutting process, the part cut | disconnected with a laser contains the area | region which closely_contact | adhered to the outer surface of the said container of the said heat-shrinkable cylindrical label, The manufacturing method of the package body as described in any one of Claim 1 thru | or 3 .   The heat-shrinkable film is a laminated film having an outer layer / one or more intermediate layer / inner layer, the outer layer and the inner layer are composed of a polyester resin layer, and the intermediate layer is a polyester resin. The manufacturing method of the package body as described in any one of Claims 1 thru | or 4 containing at least any one of the mixed resin layer and polystyrene-type resin layer containing styrene and a polystyrene-type resin.

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