WO2023120636A1 - Laminate, package, and method for manufacturing package - Google Patents

Abstract

This laminate (1) comprises a first film (11) having a first thermal shrinkage rate, a second film (12) having a second thermal shrinkage rate lower than the first thermal shrinkage rate, and an air hole (14) through which air is allowed to flow in between the first film (11) and the second film (12) at a non-bonded part (16). In a situation where the air hole (14) is formed in a bonded part (15) where the first film (11) and the second film (12) are bonded together, the non-bonded part (16) is surrounded by the bonded part except the place where the air hole (14) is formed.

Description

LAMINATE, PACKAGE, AND PACKAGE MANUFACTURING METHOD

The present disclosure relates to a laminate and the like into which gas is injected.

Laminates for packaging objects are known (for example, Patent Documents 1 and 2).

Patent Document 1 discloses a laminate. In the laminate, a low heat-shrinkable sheet and a high heat-shrinkable sheet are alternately interposed between substantially stripe-shaped partial adhesive layers arranged substantially perpendicular to the shrinking direction of the high heat-shrinkable sheet and at a specific interval a. is laminated to The laminate has a total of at least five layers of low heat-shrinkable sheets and high heat-shrinkable sheets, and has holes for sending hot air from the surface layer to the inner layer of the high heat-shrinkable sheet.

Patent Document 2 discloses an insulated container. The heat-insulating container consists of a container body, an outer layer film and an inner layer film that wrap the body portion of the container body in a wound shape, and has a check valve that enables the formation of an air chamber between the films. It is composed of a bag-shaped label with an air blowing port.

Japanese Patent Application Laid-Open No. 6-238800 (published on August 30, 1994) Japanese Patent Application Laid-Open No. 2004-1849 (published on January 8, 2004)

However, the laminate of Patent Document 1 requires holes for sending hot air from the surface layer to the highly heat-shrinkable sheet in the inner layer, and equipment for sending hot air to the holes. Similarly, the heat-insulating container of Patent Document 2 also requires an air blowing port 8 for blowing in air and a facility for blowing air into the air blowing port 8 in order to form an air chamber.

The present disclosure has been made in view of the above problems, and an object thereof is to provide a laminate or the like into which air can be easily injected.

In order to solve the above problems, the laminate according to one aspect of the present disclosure includes a first film having a first heat shrinkage rate and a non-bonded portion that is not adhered to the first film. A second film adhered to the first film and having a second heat shrinkage rate lower than the first heat shrinkage rate, and a gas between the first film and the second film in the non-bonded portion and a gas intake port for inflow, and when the gas intake port is formed in the bonded portion where the first film and the second film are bonded, the gas intake port is formed. The non-bonded portion is surrounded by the bonded portion except for the portion where the bonding portion is attached.

In order to solve the above problems, the package according to one aspect of the present disclosure includes a first film having a first heat shrinkage rate and a non-bonded portion that is not adhered to the first film. A second film that is adhered to the first film and has a second heat shrinkage rate lower than the first heat shrinkage rate, and the adhesive part where the first film and the second film are adhered a gas enclosure formed by enclosing the bond.

In order to solve the above problems, a method for manufacturing a package according to an aspect of the present disclosure includes a first film having a first heat shrinkage rate and a second heat shrinkage rate lower than the first heat shrinkage rate. wherein the non-bonded portion where the first film and the second film are not bonded is the bonded portion where the first film and the second film are bonded and shrinking the first film to allow gas to flow in from a gas intake port formed in the non-bonded portion, in that order.

In order to solve the above problems, a method for manufacturing a package according to an aspect of the present disclosure includes a first film having a first heat shrinkage rate and a second heat shrinkage rate lower than the first heat shrinkage rate. a non-bonded portion where the first film and the second film are not bonded and a bonded portion where the first film and the second film are bonded and while securing a gas intake port for introducing gas between the first film and the second film in the non-bonded portion, the non-bonded portion is surrounded by the bonded portion. and shrinking the first film to allow gas to flow in from the gas intake port, in that order.

According to one aspect of the present disclosure, it is possible to provide a laminate or the like that facilitates gas injection.

1 shows a perspective view of a laminate according to one aspect of the present disclosure; FIG. FIG. 2 shows a cross-sectional view of the laminate shown in FIG. 1 taken along the line AA. 1A and 1B are side and perspective views of a laminate according to the present disclosure; FIG. FIG. 4 is a diagram showing how air flows into the laminate according to one aspect of the present disclosure; 4 is a flow chart illustrating a method of inflowing air into the interior of a laminate according to one aspect of the present disclosure. FIG. 5 is a diagram showing how an air hole formed in a laminate according to an embodiment of the present disclosure is closed by a closing member; 1 is a schematic diagram of a container according to the present disclosure, showing a configuration using a laminate according to the present disclosure as a packaging bag; FIG. 1 is a schematic diagram of a laminate according to the present disclosure; FIG. FIG. 4 is a diagram showing an example of using the laminate according to the present disclosure as a tack label; 1 is a schematic diagram of a container according to the present disclosure; FIG. FIG. 4 is a diagram showing an example of using a laminate according to the present disclosure as a tube; FIG. 4 is a diagram illustrating a configuration that makes it difficult for air to escape from an air hole according to the present disclosure; FIG. 10 is a diagram illustrating another configuration according to the present disclosure that makes it difficult for air to escape from air holes; It is a figure explaining a mode that the masking layer was formed on the contact bonding layer. 4 illustrates an air circuit formed using a masking layer; FIG. 4 is a diagram for explaining an application example of an air circuit formed by a masking layer; FIG. 10 is a diagram for explaining still another application example of the air circuit formed by the masking layer;

[Embodiment]
An embodiment of the present disclosure will be described in detail below with reference to a schematic diagram such as FIG.

In describing one embodiment of the present disclosure, the following will be added. "Front" refers to the outer side, and "back" refers to the inner side. The "first direction" and the "second direction" are orthogonal to each other within the plane of the film. The numerical range represented by “lower limit value XXX to upper limit value YYY” means the lower limit value XXX or higher and the upper limit value YYY or lower. When a plurality of numerical ranges are separately described, an arbitrary lower limit value and an arbitrary upper limit value can be selected, and "an arbitrary lower limit value to an arbitrary upper limit value" can be set.

(Laminate)
FIG. 1 shows a perspective view of a laminate 1 according to one aspect of the present disclosure. As illustrated, the laminate 1 includes a first film 11 having a first heat shrinkage rate, a second film 12 having a second heat shrinkage rate lower than the first heat shrinkage rate, and a second An air hole 14 (gas intake port) for introducing air between the first film 11 and the second film 12 is provided. By having the above structure, the laminate 1 is configured such that the first film 11 is thermally shrunk to sag the second film 12 and to inject gas (for example, air) from the air hole 14 into the gas filling portion 17. is. In the following description, air is used as an example of the gas to be injected into the gas enclosure 17 . The gas injected into the gas enclosure 17 is not limited to air, and may be other gas such as nitrogen. Injection of the gas into the gas-filled portion 17 is realized by air flowing into the hollow portion from the air hole 14 in the process of forming the hollow portion as the gas-filled portion 17 by thermal contraction of the first film 11 . be. For example, if the first film 11 is thermally shrunk in a nitrogen atmosphere, nitrogen can flow into the gas-filled portion 17 .

[First film 11]
The first film 11 is a film that heat-shrinks at least in the first direction. A heat-shrinkable film is a film that does not shrink at room temperature (eg, 23° C.) but shrinks in a predetermined direction when heated to a heat shrink temperature (eg, 80° C. to 100° C.). A film that is heat-shrinkable in at least the first direction is a film that is heat-shrinkable in at least the first direction.

The first direction means one direction in the plane of the film, and the second direction is the direction orthogonal to the first direction in the plane of the film. For example, when the laminate 1 is rectangular, the first direction is the lateral direction of the laminate 1 and the second direction is the longitudinal direction of the laminate 1 . The first direction may be defined as the longitudinal direction of the laminate 1 .

The thermal shrinkage rate in the first direction of the first film 11 (hereinafter referred to as "first thermal shrinkage rate") is not particularly limited, but is preferably 20% or more, more preferably 30% or more, More preferably, it is 40% or more. When the first film 11 is a film that heat-shrinks in the second direction, the heat shrinkage rate in the second direction is not particularly limited, but is preferably 20% or more, more preferably 30% or more, and still more preferably. is 40% or more. Theoretically, the upper limit of the thermal shrinkage in the first direction and the second direction is less than 100%.

The heat shrinkage rate of the film is determined as follows. First, the film length (original length) before heating (stored for 24 hours under standard conditions (23 ° C., 1 atm, 50% RH atmosphere)), and immersed in 90 ° C. warm water for 10 seconds The length of the film after removal (length after immersion) is measured under standard conditions. Next, the measured result is substituted into the following formula. Thereby, the thermal shrinkage rate of the film is obtained.
Thermal shrinkage rate (%) = [{(original length in first direction (or second direction)) - (length after immersion in first direction (or second direction))}/(first direction ( or the original length in the second direction))]×100.

Various films can be used for the first film 11 provided that they have the above-described thermal properties. Examples of materials for the first film 11 include synthetic resin films, non-woven fabric films, foamed resin films, and the like. The first film 11 may be a laminated film containing at least one material selected from the materials described above. The laminated film may be a laminate of a film having substantially no heat shrinkability and a film having heat shrinkability, provided that the laminate as a whole has heat shrinkability. A laminate consisting of a heat-shrinkable film is preferred.

A synthetic resin film or a laminate film having a synthetic resin layer is preferably used as the first film 11, and more preferably a single layer synthetic resin film or a multilayer synthetic resin film is used. A single-layer synthetic resin film is a film composed of a single synthetic resin layer, and a multi-layer synthetic resin film is a laminated film in which two or more synthetic resin layers are laminated.

The material of the synthetic resin film (synthetic resin layer) is not particularly limited, and includes polyester resins such as polyethylene terephthalate and polylactic acid; olefin resins such as polyethylene, polypropylene, and cyclic olefins; polystyrene, styrene-butadiene copolymers, and the like. One or a mixture of two or more selected from thermoplastic resins such as polystyrene-based resins; polyamide-based resins; and vinyl chloride-based resins. Materials for the non-woven fabric film and foamed resin film are not particularly limited, and conventionally known synthetic resins may be used. The non-woven fabric film and foamed resin film themselves can be expected to have a heat insulating effect.

A heat-shrinkable synthetic resin film can be obtained by a known film-forming method. For example, a resin composition containing a synthetic resin and optionally various additives is mixed with a mixer or the like, melted using an extruder, extruded through a T-die, stretched and heat-set. Obtainable. The stretching treatment may be either a tenter method or a tube method. The stretching treatment is usually carried out at a temperature of about 70 to 110° C., and the longitudinal direction (for example, the MD direction during film formation) and/or the width direction (TD direction during film formation) independently from 2.0 to It is carried out by stretching to 8.0 times (preferably about 3.0 to 7.0 times). When the film is stretched in both the longitudinal direction and the transverse direction, it becomes a biaxially stretched film that can be thermally shrunk in both the first direction and the second direction.

The thickness of the first film 11 is not particularly limited, and is, for example, 10 μm to 300 μm. In particular, when a synthetic resin film is used as the first film 11, its thickness is, for example, 10 μm to 100 μm.

The first film 11 may be transparent (colorless transparent or colored transparent) or non-transparent.

[Second film 12]
The second film 12 is a film having a second heat shrinkage rate lower than the first heat shrinkage rate at least in the first direction. The second film 12 may be a film that is substantially non-heat shrinkable at least in the first direction. A film having substantially no heat shrinkability means that the film does not shrink at room temperature and hardly shrinks when heated to the heat shrink temperature. For example, in terms of heat shrinkage, the second film 12 that does not have substantially heat shrinkage has a heat shrinkage of 0 to 5% independently in the first direction and the second direction, preferably 0-3%. The meaning of the heat shrinkage rate is as described above.

Various films can be used for the second film 12 provided that it has a second heat shrinkage rate lower than the first heat shrinkage rate at least in the first direction. As the material of the second film 12, for example, a synthetic resin film or a laminate film having a synthetic resin layer is used, and more preferably, a single-layer synthetic resin film or a multi-layer synthetic resin film is used. Materials for the second film 12 include a synthetic resin film substantially non-heat-shrinkable, paper, a non-woven fabric film substantially non-heat-shrinkable, and a foamed resin film substantially non-heat-shrinkable. And a functional film having gas barrier properties, light shielding properties, etc. substantially not having heat shrinkability, a sealant film substantially not having heat shrinkability, and a laminated film containing at least one selected from these are used. may be Preferably, the second film 12 is a synthetic resin film that does not substantially have heat shrinkability.

The material of the synthetic resin film (synthetic resin layer) is not particularly limited, and includes polyester resins such as polyethylene terephthalate and polylactic acid; olefin resins such as polyethylene, polypropylene, and cyclic olefins; polystyrene, styrene-butadiene copolymers, and the like. One or a mixture of two or more selected from thermoplastic resins such as polystyrene-based resins; polyamide-based resins; and vinyl chloride-based resins. Materials for the non-woven fabric film and foamed resin film are not particularly limited, and conventionally known synthetic resins may be used. The non-woven fabric film and foamed resin film themselves can be expected to have a heat insulating effect.

The thickness of the second film 12 is not particularly limited, and is, for example, 8 μm to 300 μm. In particular, when a synthetic resin film is used as the second film 12, its thickness is, for example, 8 μm to 250 μm, preferably 12 μm to 200 μm.

The second film 12 may be transparent (colorless transparent or colored transparent) or non-transparent.

[Adhesion layer 13]
Next, the adhesive layer 13 will be described with reference to FIG. FIG. 2 shows a cross-sectional view of the laminate 1 shown in FIG. 1 taken along line AA. In the following, for convenience of explanation, the explanation of members with the same reference numerals will be omitted.

The adhesive layer 13 bonds the first film 11 and the second film 12 together. The adhesive layer 13 is made of, for example, an adhesive or a solvent. For example, by applying an adhesive to the surface of the first film 11 (or/and the back surface of the second film 12) and overlapping the surface of the first film 11 and the back surface of the second film 12, the first film 11 and the second film 12 are adhered via an adhesive. When the first film 11 and the second film 12 are made of a solvent-bondable material, the surface of the first film 11 (or/and the back surface of the second film 12) is coated with a solvent. By superimposing the front surface of the first film 11 and the back surface of the second film 12, the first film 11 and the second film 12 are melted by the solvent and adhered. In this case, the first film 11 and the second film 12 are directly adhered, and the adhered portion becomes the adhered portion 15 .

When the surface of the first film 11 and the back surface of the second film 12 are made of a sealant film having a heat-sealable property, the first film 11 and the second film 12 are heat-sealed. It is heat welded. In this case, the first film 11 and the second film 12 are directly heat-sealed, and the heat-sealed portion becomes the adhesive portion 15 .

[Adhered portion 15, non-adhered portion 16]
The bonded portion 15 and the non-bonded portion 16 will be described with reference to FIGS. 1 and 2. FIG.

The first film 11 and the second film 12 are adhered via an adhesive layer 13 so as not to separate. The first film 11 and the second film 12 are composed of an adhesive portion 15 where the layers of the first film 11 and the second film 12 are bonded and a non-bonded portion where the layers of the first film 11 and the second film 12 are not bonded. 16. The non-adhesive portion 16 corresponds to a portion where the adhesive layer 13 is not formed. As shown in FIG. 2, the adhesive layer 13 does not exist between the first film 11 and the second film in the non-adhesive portion 16, and the gas enclosing portion 17 is formed.

The non-bonded portion 16 may be realized by the following configuration. An adhesive layer 13 is formed on the entire surface between the first film 11 and the second film 12 . The adhesive layer 13 has a masking layer formed in a region corresponding to the non-adhesive portion 16 , and the adhesive strength of the adhesive layer 13 is lost in the region where the masking layer is formed. According to this configuration, even if the adhesive layer 13 is formed on the entire surface between the first film 11 and the second film 12, the first film 11 and the second film 12 do not adhere to each other. A portion 16 can be formed. The non-bonded portion 16 can also be formed with such a configuration.

In FIG. 1, the adhesive portions 15 are located at the peripheral edge portions of the first film 11 and the second film 12, respectively. The non-bonded portion 16 is surrounded by the bonded portion 15 . That is, the second film 12 is adhered to the first film 11 so that the non-adhesive portion 16 that is not adhered to the first film 11 exists.

[Air hole 14]
The first film 11 or the second film 12 has air holes 14 . Specifically, the air holes 14 are formed in the non-bonded portion 16 of the first film 11 or the second film 12 . Although details will be described later, air flows between the first film 11 and the second film 12 in the non-bonded portion 16 through the air holes 14 . The air holes 14 may be appropriately determined in shape, number and size. This also applies to air holes 314, which will be described later. Therefore, the air holes 14 may be present in two or more, and may be realized in various shapes such as circular, square, elliptical, or slit (cut).

The air holes 14 can be formed by perforating processes such as laser, sewing, press, or half-cutting. For example, when forming the air holes 14 with a laser, the output of the laser is adjusted based on the absorption wavelength peculiar to the resin constituting the first film 11 or the second film 12 in which the air holes 14 are formed. to form When the air holes 14 are formed by a sewing machine, the process of forming the air holes 14 by a sewing machine may be introduced into the crimping process, the sheet feeding process, or the like. Note that the air holes 14 may be formed manually.

Further, an air hole 314, which is a modified example of the air hole 14, will be described with reference to FIG. FIG. 3 is a side view and cross-sectional view of a laminate 300 according to the present disclosure. The view indicated by reference number 3000 is a side view of the laminate 300 and the view indicated by reference number 3010 is a perspective view of the laminate 300 .

First, as shown in the drawing with reference number 3000 , the laminate 300 includes a first film 11 , a second film 12 , an adhesive layer 13 and air holes 314 . The adhesive layer 13 has air holes 314 . Specifically, the air holes 314 are formed in the adhesive layer 13 and are not formed in the first film 11 and the second film 12 .

Next, air holes 314 are formed in at least one side of the laminate 300, as shown in the drawing with reference numeral 3010. FIG. Air holes 314 may be formed on multiple sides. The air hole 314 penetrates the inside of the adhesive layer 13 from the one side surface of the laminate 300 to the non-adhesive portion 16 . As described above, in the laminate 300, the air holes 314 are formed in the adhesion portion 15 where the first film 11 and the second film 12 are adhered. The non-bonded portion 16 is surrounded by the bonded portion 15 . Since the laminate 300 allows air to flow into the gas-filled portion 17 through the air holes 314 , it is not necessary to form air holes in the first film 11 or the second film 12 .

(Air inflow into laminate)
A method of introducing air into the laminate 1 will be described with reference to FIGS. 4 and 5. FIG. FIG. 4 is a diagram showing how air flows into the laminate 1. As shown in FIG. FIG. 5 is a flow chart showing a method of introducing air into the laminate 1. As shown in FIG.

Reference number 4000 in FIG. 4 shows a cross-sectional view of the laminate 1 before the first film 11 is thermally shrunk. It may be considered as a cross-sectional view of the laminate 1 shown in FIG. 1 taken along the line AA. This configuration is obtained by the step of adhering the first film 11 and the second film 12 so that the non-adhered portion 16 is surrounded by the adhered portion 15 (S2 in FIG. 5). In FIG. 4, the gas-filled portion 17 indicates a space formed by surrounding the non-bonded portion 16 with the bonded portion 15 where the first film 11 and the second film 12 are bonded.

Reference number 4010 in FIG. 4 shows a cross-sectional view of the laminate 1 after the first film 11 has been thermally shrunk. This state is obtained by the following steps (1) to (3).

(1) Heat the first film 11 to thermally shrink the first film 11 in the first direction (S4 in FIG. 5). For heating, an appropriate method such as hot air, steam, or LED irradiation can be adopted. When LED irradiation is employed, the first film 11 may be coated with a substance that generates heat when activated by ultraviolet rays, or may be mixed in the first film 11 . Substances that generate heat when activated by ultraviolet rays include, for example, (white) titanium dioxide (TiO ₂ ), (black) carbon black, (cyan) phthalocyanine, (magenta) quinacridone, diketopyrrolopyrrole, naphthol-based azo pigments, anthraquinone, (Yellow) UV absorbing materials selected from acetoacetate-based and/or anhydride-based azo pigments, dioxazine and benzotriazole UV absorbers, or combinations thereof.

(2) As the first film 11 thermally shrinks, the second film 12, which has a second thermal shrinkage rate lower than the first thermal shrinkage rate in the first direction, is allowed to sag upward (upward in the drawing) (FIG. 5). of S6).

(3) As the second film 12 slackens, air flows into the gas-filled portion 17 through the air holes 14 formed in the second film 12 . Air flows into the gas-filled portion 17 from the air hole 14, thereby expanding the gas-filled portion 17 (S8 in FIG. 5).

The configuration indicated by reference number 4020 in FIG. 4 is obtained by a step of closing the air hole 14 with a closing member 40 (for example, a tack seal) in order to hold the air that has flowed into the gas filling portion 17 (FIG. 5). S10).

The air holes 14 may be formed in the first film 11 or the second film 12 before the step of adhering the first film 11 and the second film 12 together. The air holes 14 may be formed in the first film 11 or the second film 12 after the step of bonding the first film 11 and the second film 12 together.

Through the above steps, a package formed by air flowing into the laminate 1 is obtained. By adjusting the shape of the non-bonded portion 16, the shrinking direction of the first film 11, and the like, the package can have a predetermined shape. For example, at least part of the non-bonded portion 16 may have a shape extending along the second direction perpendicular to the first direction in plan view.

(Closing of air hole 14)
The method of closing the air hole 14 that communicates between the gas filling portion 17 and the outside of the package includes the method of using the closing member 40 described with reference number 4020 in FIG. 4, and the method described with reference to FIG. may be

FIG. 6 is a diagram showing how the air holes 14 formed in the laminate 1 according to the embodiment of the present disclosure are closed by the closing member 60. FIG.

In the configuration indicated by reference number 6000 in FIG. 6, the air holes 14 formed in the laminate 1 are closed by the closing member 60. The closing member 60 may be a material suitable for closing the air holes 14, such as resin or adhesive. By using the closing member 60, the air hole 14 can be closed to such an extent that it is difficult to visually recognize that the air hole 14 existed.

The configuration indicated by reference number 6010 in FIG. 6 illustrates a laminate 610 according to one embodiment of the present disclosure. A laminate 610 is a laminate having the air holes 314 of the laminate 300 shown in FIG.

The heat-sensitive adhesive 61 is applied to positions corresponding to the air holes 314 on the first film 11 or the second film 12 . After the air is sealed in the gas filling portion 17 , the air holes 314 are heated and pressurized to activate the heat-sensitive adhesive 61 and close the air holes 314 .

The heat-sensitive adhesive 61 may be made of a material that is not activated at the temperature at which the first film 11 heat shrinks. Also, by using an adhesive that is activated by ultraviolet irradiation or the like instead of the closing means using the heat-sensitive adhesive 61, the air holes 314 can be closed by the action of the adhesive.

The configuration indicated by reference number 6020 in FIG. 6 illustrates a laminate 620 according to one embodiment of the present disclosure. The laminate 620 is a laminate having the air holes 314 of the laminate 300 shown in FIG.

The sealant layer 62 is provided on the back surface of at least one of the first film 11 and the second film 12 and is the innermost layer. 6, the sealant layer 62 is provided on the back surface of the second film 12 (the surface facing the first film 11). After the air is sealed in the gas sealed portion 17, the sealant layer 62 is heat-sealed so that the air hole 314 can be closed by thermal welding.

In this way, the laminate 610 and the laminate 620 have closing members (the heat-sensitive adhesive 61 and the sealant layer 62) that close the air holes 314 using heat, ultraviolet rays, or the like. By having the structure described above, the laminate 610 and the laminate 620 can block the air hole 314 to such an extent that it is difficult to visually recognize the existence of the air hole 314 .

Here, in reference number 4020 in FIG. 4, S10 in FIG. 5, and FIG. However, the air holes 14 do not necessarily have to be closed. For example, since the laminate 1 has a structure of a check valve inside the gas-filled portion 17 , most of the air once held in the gas-filled portion 17 can be held in the gas-filled portion 17 .

Further, depending on the size and shape of the air holes 14, the material of the first film 11 (or the second film 12, the adhesive layer 13) in which the air holes 14 are formed, etc., even if the air holes 14 are not closed, the gas Most of the air once held in the enclosing part 17 can be held in the gas enclosing part 17 .

Various application examples of the laminate 1 using the inventive principle of the laminate 1 according to the present disclosure will be described below.

(Exterior paste)
FIG. 7 is a schematic diagram of a container 700 (package) according to the present disclosure, showing a configuration using the laminate 1 according to the present disclosure as a packaging bag. For example, container 700 can be used as a container for toiletries and the like.

As shown in the drawing with reference number 7000 , the container 700 has a second film 712 , a first film 11 attached on the second film 712 , and air holes 14 formed in the first film 11 . The second film 712 may be made of the same material as the second film 12 . The main shrinkage direction of the first film 11 is the width direction of the container 700 (horizontal direction in the figure indicated by reference number 7000).

As shown in the drawing with reference number 7010, in the container 700, when the first film 11 is thermally shrunk, the second film 712 swells in the direction away from the first film 11 (the inner direction of the container 700). When the second film 712 expands, air flows in through the air holes 14 formed in the first film 11, and the gas filling portion 17 between the first film 11 and the second film 712 expands.

The method by which the container 700 is formed has been described above. However, the container 700 may be formed by using, as a part of the container 700, a layered body (packaging body) obtained by thermally shrinking the first film 11 and swelling the second film 712 .

The container 700 has various effects by being provided with the above configuration. For example, the container 700 can enhance the heat insulating effect of the container by having the gas filling portion 17 . Depending on the contents of container 700, thermal insulation can be extremely useful. In addition, the container 700 has the gas filling portion 17, so that the container 700 itself can be improved in self-reliance. Further, the container 700 has the gas-filled portion 17 as a handle, so that the container 700 can be easily gripped.

Also, in the container 700 , the second film 712 expands toward the inside of the container 700 . The container 700 can be designed based on the degree or shape of swelling of the second film 712, etc., based on the material and shape of the first film 11 and the second film 712, or the contraction direction of the first film. That is, the container 700 can flexibly change functionality and design.

Furthermore, in the container 700, the size and shape of the first film 11 can be changed as appropriate. That is, in the container 700, the volume of the gas-filled portion 17 can be flexibly increased or decreased. For example, consider the case where the first film is attached to the second film 712 so as to cover most of the second film 712 . In this case, the container 700 has a gas filling portion 17 with a very large volume. Thereby, the container 700 can further improve the self-sustainability and structural strength. If the strength can be increased structurally, the container 700 has increased drop strength, and the thickness of the container 700 can be reduced.

Thus, the container 700 according to the present disclosure can achieve various effects by using the laminate 1 as a container (packaging bag) or a part thereof.

(inner paste)
FIG. 8 is a schematic diagram of a laminate 800 according to the present disclosure, which is a variation of laminate 1 .

As shown in the drawing with reference number 8000, the laminate 800 includes a first film 11, a second film 12a, a second film 12b, an adhesive layer 13a, an adhesive layer 13b, air holes 14a, and air holes 14b.

The second film 12a adheres to the first film 11 via the adhesive layer 13a. Air holes 14a are formed in the second film 12a. The second film 12b adheres to the first film 11 via the adhesive layer 13b. Air holes 14b are formed in the second film 12b. That is, the laminate 800 has a configuration in which the second films 12 are attached to both surfaces of the first film 11 in the laminate 1 .

As shown in the drawing with reference number 8010, in the laminate 800, when the first film 11 is thermally shrunk, the second films 12a and 12b swell in directions away from the first film 11, respectively. As a result, air flows in from the air hole 14a and the air hole 14b, and the gas-filled portion 17a between the first film 11 and the second film 12a and the gas-filled portion between the first film 11 and the second film 12b are formed. 17b expand respectively.

The laminate 800 can also be used, for example, as a handle 105 shown in FIG. 10, which will be described later. Depending on the application, the laminate 800 can provide the same effects as the container 700 in terms of heat insulating effect, functionality, design (decoration by unevenness), independence of the container, and structural strength.

(tack label)
FIG. 9 is a diagram showing an example of using the laminate 1 according to the present disclosure as a tack label. A tack label is one type of package, and is a sticker label in which an adhesive (adhesive layer) is processed in advance on the back surface of a label base material.

In the illustrated example, an adhesive layer 91 is processed on the back surface of the first film 11 of the laminate 1 , and the laminate 1 and the adherend 90 are adhered via the adhesive layer 91 . After the first film 11 is thermally shrunk and the second film 12 is expanded, the laminate 1 (package) may be adhered to the adherend 90 . The adherend 90 may be, for example, a canned drink, a PET bottle, or a toiletry item.

By adhering the tack label (laminate 1) to the adherend 90, the self-supporting property of the adherend 90 itself can be improved. Furthermore, by using the tack label as a handle, the adherend 90 can be easily gripped.

The laminate 1 can also have a printed layer. An example thereof will be described with reference to FIG.

(packaging bag)
FIG. 10 is a schematic diagram of a container 110 according to the present disclosure. As shown in the view at reference numeral 1000, container 110 is constructed primarily by laminate 100 in accordance with the present disclosure and has handle 105 as a structural component. Also, as shown in the drawing with reference number 1010 , the laminate 100 has a first film 11 , a second film 12 , an adhesive layer 13 and a printing layer 18 . That is, in the container 110, the first film 11, the printed layer 18, the adhesive layer 13, and the second film 12 are laminated in this order from the outside of the container 110. Between the first film 11 and the second film 12, It has a printed layer 18 . More specifically, the printed layer 18 is provided between the first film 11 and the adhesive layer 13 . The printed layer 18 is a layer for displaying labels (various designs, product names, raw materials, precautions for use, etc.) of the container 110 . In the container 110, the outermost layer is the first film 11, and the main shrinkage direction of the first film 11 is the width direction of the container 110 (horizontal direction indicated by reference number 1000).

Note that the printed layer 18 may be provided on the front side of the first film 11 . In this case, the printed layer 18 , the first film 11 , the adhesive layer 13 and the second film 12 are laminated in this order from the outside of the container 110 .

When the laminate 100 is used to form a desired shape, when the first film 11 thermally shrinks, the second film 12 swells in the direction away from the first film 11 (toward the inside of the container 110). As a result, the container 110 can maintain a flat surface on the container surface side, and the printed display on the printed layer 18 can be maintained in an easy-to-read state without being distorted.

For example, the container 110 may be manufactured by bonding two laminates 100 together. Specifically, two laminates 100 are prepared, and the peripheral edge portions of the second films 12 are attached to each other. At this time, when the two second films 12 have a plurality of layers, and among the plurality of layers, the innermost layer of the container 110 is a sealant layer, the sealant layers are overlapped. Together, the second films 12 are attached to each other. Alternatively, the two second films 12 may have a single layer structure consisting of only the sealant layer. The container 110 can be manufactured in this way.

In this configuration, the handle 105 may be formed as follows. The handle 105 is the part indicated by the dashed line in FIG. A portion corresponding to the handle 105 is a non-bonded area where the first film 11 and the second film 12 are not bonded, and other portions are bonded areas where the first film 11 and the second film 12 are bonded. Then, by thermally shrinking the first film 11 in the non-adhesive region corresponding to the handle 105, air is allowed to flow into the gas filling portion 17 from the air holes 14 formed in the first film 11, thereby forming the handle 105.

The handle 105 functions as a handle when the user holds the container 110 . The handle 105 can be formed using laminate 1, laminate 610, laminate 620, laminate 700, laminate 800, or laminate 100 (hereinafter referred to as laminate 1, etc.). For example, the container 110 is manufactured so that the laminate 1 having the shape of the handle 105 shown in FIG. 10 is positioned on the front side of the second film 12 of the laminate 1 . After that, the first film 11 of the laminate 1 is heated. As a result, the second film 12 expands on the surface side of the container 110 . The bulging portion is used as the handle 105 of the container 110. - 特許庁The handle 105 may be realized by providing the first film 11 of the laminate 1 on the front side and heating the first film 11 to expand the second film 12 inside the container 110 . The handle 105 can exhibit the handle function also with this configuration.

Thus, the container 110 provided with the handle 105 using the laminate 1 or the like can be easily manufactured. Alternatively, the laminate 1 and the like that function as the handle 105 can be easily retrofitted to the separately manufactured container 110 . 10, at least part of the non-bonded portion (not shown) of handle 105 has a shape extending along the second direction perpendicular to the first direction in plan view. can also This allows the container 110 to have a handle 105 that is easier to grip.

Note that the handle 105 also functions as an air column that enhances the structural strength of the container 110, and thus helps the container 110 stand on its own and maintain its shape.

(tube container)
FIG. 11 is a diagram showing an example of using the laminate 1 according to the present disclosure as a tube 120. As shown in FIG. Reference number 1100 indicates a conventional tube 1100 and reference number 1200 indicates a tube 120 according to the present disclosure.

In the manufacturing process of the conventional tube 1100, the end (the side opposite to the cap) is heat-sealed. For this reason, the tube 1100 has a cylindrical body, but becomes wider toward the ends.

On the other hand, the tube 120 is manufactured by laminating a plurality of laminates 1 (or laminates 610, 620, 700, 800, and 100) according to the present disclosure. can be done. In the laminate 1, the first film 11 and the second film 12 can be of any shape, and the shape of the gas filling portion 17 can also be arbitrarily designed.

Thus, the tube 120 can have any shape, and as an example, in FIG. 11, the tube 120 is a straight type (straight body type). In this way, since the tube 120 according to the present disclosure can flexibly change its shape, it is possible to achieve both functionality and design of the tube container. Also, by using such a tube 120, the brand image of the product can be enhanced.

As described above, the laminate according to the present disclosure can be used as a tack label, packaging bag, tube container, or part thereof.

In addition, according to the present disclosure, after the package according to the present disclosure is used, the gas can be discharged from the gas-filled portion 17 to lose its rigidity, and the package can be compactly crushed. can be reduced.

(Structure that makes it difficult for air to escape from the air hole)
The laminated body 1 may have a structure in which the air once held in the gas-filled portion 17 is difficult to escape to the outside. An example thereof will be described with reference to FIG.

FIG. 12 is a diagram illustrating a configuration that makes it difficult for air to escape from the air holes 14 according to the present disclosure. Reference number 1250 in FIG. 12 shows a front view of laminate 125 according to one aspect of the present disclosure. Reference number 1260 in FIG. 12 shows a front view of laminate 126 according to one aspect of the present disclosure.

With reference to the diagram indicated by reference number 1250, the laminate 125 differs from the laminate 1 in the following points. Specifically, the laminated body 125 has a reduced diameter portion 19a in the body, and the diameter of the body portion is reduced at the reduced diameter portion 19a. The air hole 14 is formed in the smaller body portion 19c of the two body portions 19b and 19c separated by the reduced diameter portion 19a.

According to this configuration, the diameter-reduced portion 19 a can block the flow of gas in the gas-filled portion 17 by reducing the inner diameter of the gas-filled portion 17 . Furthermore, since the body portion 19c, which is the smaller body portion, is formed with the air holes 14, even if external pressure is applied to the larger body portion 19b, the air retained in the gas filling portion 17 is released to the outside. can reduce the possibility. The position or the degree of diameter reduction of the diameter-reduced portion 19a may be appropriately determined as long as the effect can be obtained.

Next, referring to the diagram indicated by reference number 1260 in FIG. 12, the laminate 126 differs from the laminate 1 in the following points. Specifically, the laminate 126 has a protrusion 19e that protrudes from the main body 19d in plan view. The air hole 14 is formed so as to be positioned within the protrusion 19e. Furthermore, the laminated body 126 has an inner protrusion 19f at a position within the gas-filled portion 17 and at the base of the protrusion 19e. The inner protrusion 19 f protrudes toward the inside of the gas-filled portion 17 and reduces the inner diameter of the gas-filled portion 17 .

According to this configuration, the inner protrusion 19f can block the flow of gas in the gas-filled portion 17 by reducing the inner diameter of the gas-filled portion 17, and even when the main body portion 19d is subjected to external pressure, It is possible to reduce the possibility of gas leaking out from the air holes 14 . The position or the degree of projection of the inner projection 19f may be determined appropriately as long as the effect is obtained.

According to the above, it is possible to achieve a configuration in which the air once held in the gas sealed portion 17 is difficult to escape to the outside without blocking the air hole 14 with a blocking member.

Next, another configuration that makes it difficult for air to escape from the air holes 14 according to the present disclosure will be described with reference to FIG. 13 . FIG. 13 is a diagram illustrating another configuration according to the present disclosure that makes it difficult for air to escape from the air holes 14. As shown in FIG.

Reference number 1300 in FIG. 13 shows a front view of the laminate 130 according to one aspect of the present disclosure. Reference number 1310 in FIG. 13 shows a front view of laminate 131 according to one aspect of the present disclosure.

First, referring to the diagram indicated by reference number 1300 in FIG. 13, the laminate 130 differs from the laminate 1 in the following points. Specifically, the laminate 130 is formed in a substantially hexagonal shape when viewed from the front. The laminate 130 extends long in the second direction and has vertices 135a and 135b at the ends of the hexagon. Air hole 14 is formed near one vertex 135a.

The laminated body 130 has the following effects by having the above configuration. Specifically, by forming the air hole 14 near the narrow vertex 135a (or vertex 136b), it becomes difficult for air to pass through the narrow portion. can reduce the possibility of falling out.

Further, when heat shrinking the first film 11 to which the sides extending parallel to the first direction are adhered, the first film 11 is fixed in the heat shrinking direction, and heat shrinks in the first direction. It is difficult to stretch, and heat shrinking tends to cause distortion. Therefore, in the laminate 130, the appearance when the first film 11 is thermally shrunk is improved by minimizing the adhesive portion parallel to the first direction (that is, the portion that resists the thermal shrinkage). doing better This also applies to a laminate 131, which will be described later.

Next, referring to the diagram indicated by reference number 1310 in FIG. 13, the laminate 131 differs from the laminate 1 in the following points. Specifically, the laminate 131 is formed in a substantially elliptical shape when viewed from the front. The laminate 131 extends long in the second direction and has vertices 136a and 136b at the vertices of an ellipse. Air hole 14 is formed near one vertex 136a.

The laminated body 131 has the following effects by having the above configuration. Specifically, by forming the air hole 14 near the narrow vertex 136a (or vertex 136b), it becomes difficult for air to pass through the narrow portion. It can reduce the possibility of falling out.

The configuration according to the present disclosure, which makes it difficult for air to escape from the air holes, has been described above with reference to FIG. FIG. 13 is an example, and is not limited to this. A configuration different from that shown in FIG. 13 may be employed as long as the air hole 14 is provided at a narrow position so that the air is less likely to escape.

Also, the laminate 125, the laminate 126, the laminate 130, and/or the laminate 131 may be used as follows. As an example, instead of the handle 105 of FIG. 10, a laminate 125 shown in FIG. 12 is used. Specifically, the handle 105 is the part indicated by the dashed line in FIG. The portion indicated by the broken line is a non-adhesive region where the first film 11 and the second film 12 are not adhered, and the non-adhesive region has the same shape as the non-adhesive region of the laminate 125 shown in FIG. do. The first film 11 and the second film 12 are adhered around the non-adhesive area. Then, by thermally shrinking the first film 11 in the non-adhesive region corresponding to the laminate 125 , air is caused to flow into the gas filling portion 17 from the air hole 14 . Thereby, a handle having the shape of the laminate 125 is formed.

In this way, the laminate 125 is also utilized as a handle of the container 110 and/or an air column that enhances the structural strength of the container 110 . Similar to laminate 125, laminates 126, 130, and 131 can also be utilized as handles for container 110 and/or air columns to increase structural strength of container 110. FIG.

Furthermore, a configuration for improving the finish of the container 110 when using the laminate 125 and the like shown in FIGS. 12 and 13 for the container 110 shown in FIG. 10 will be described. In the manufacturing process of the container 110, the bonding area around the laminate 125 is heated in advance by heat sealing or the like to eliminate the heat contraction force in the bonding area. As a result, when the entire container 110 is heated to heat the area (non-adhesive area) where the laminate 125 is provided, only the non-adhesive area can be thermally shrunk, and the adhesive area is strained by heating. do not cause As a result, the finish of the container 110 can be kept good. According to the above, by changing the timing of thermal contraction according to the position of the container 110, the appearance of the container 110 can be improved.

(Formation of air circuit)
As described above, the adhesive layer 13 is formed on the entire surface between the first film 11 and the second film 12, the masking layer is formed on the adhesive layer 13 in the region corresponding to the non-adhesive portion 16, and the masking layer It is also possible to employ a configuration in which the adhesive strength of the adhesive layer 13 is lost in the region where the is formed. An example thereof will be described below with reference to FIGS. 14 and 15. FIG.

FIG. 14 is a diagram for explaining how the masking layer 140 is formed on the adhesive layer 13. FIG. The figure indicated by reference numeral 1400 shows how the first film 11, the masking layer 140, the adhesive layer 13, and the second film 12 are laminated in order from the top. The view indicated by reference numeral 1410 more clearly shows how the masking layer 140 is formed over the adhesive layer 13 .

A masking layer 140 is formed on the adhesive layer 13 with reference to the drawing indicated by reference number 1400 . The masking layer 140 may be formed in any shape on the adhesive layer 13, and is formed along three sides of the rectangular second film 12 in FIG. The masking layer 140 inhibits the adhesive function of the adhesive layer 13, and is applied at a position where the first film 11 and the second film 12 are separated when the first film 11 is thermally shrunk. Since the position where the first film 11 and the second film 12 are separated becomes a gap, the masking layer 140 has the function of forming an air path (air circuit) between the first film 11 and the second film 12. have The masking layer 140 is formed, for example, with an ink containing silicon or nitrocellulose.

FIG. 15 illustrates an air circuit formed using the masking layer 140. FIG. The air circuit is the portion indicated by the gray area in FIG. Reference number 1500 indicates that an annular air circuit 142 is formed along the outer edge of the substantially rectangular first film 11 . Reference number 1510 shows that a plurality of linear air circuits have been added to the view shown in reference number 1500 so as to traverse the circular air circuit. Reference number 1520 indicates how the air circuit is formed in an island shape (dot shape) in the drawing indicated by reference number 1500 .

By applying a masking layer 140 on the adhesive layer 13 corresponding to the air circuit 142 , the air circuit 142 is formed along the outer edge of the first film 11 with reference to the drawing indicated by reference number 1500 . The width, position, angle, or the like of the air circuit 142 may be changed as appropriate. At this time, the air hole 14 may be positioned at any position on the air circuit 142 .

The figure indicated by reference number 1510 shows how three straight air paths 144 are formed in parallel in the air circuit 142 shown in the figure indicated by reference number 1500 . This air path 144 is formed by applying a masking layer 140 onto the adhesive layer 13 corresponding to the air path 144 . This is as described above.

The diagram indicated by reference number 1520 shows how three air paths 146 are formed in parallel substantially parallel to the long sides of the rectangular first film 11 . The air path 146 has a shape in which island-like (dot-like) spaces are connected in series. The number of air paths 146 is not limited to three, and may be any number. Also, the island-shaped space included in the first air path 146 may be connected to the adjacent island-shaped space of the second air path 146 . This air path 146 is formed by applying a masking layer 140 onto the adhesive layer 13 corresponding to the air path 146 . This is as described above.

The air circuit formed by the masking layer 140 has been described above with reference to FIG. This air circuit has the following various effects. As an example, consider the case where the first film 11 is attached to the second film 712 so as to cover most of the second film 712 in the container 700 of FIG. It is also assumed that container 700 has air circuit 142 as described with reference to FIG.

By forming the air circuit 142 over the upper and lower ends of the container 700, the air circuit 142 serves as an air column of the container 700, and the independence of the container 700 can be enhanced. Even when the contents in the container 700 decrease, the container 700 can maintain its independence without bending. In other words, the air circuit 142 also helps keep the shape of the container 700 .

Furthermore, by having the air circuit 144 shown in the drawing with reference number 1510 and/or the air circuit 146 shown in the drawing with reference number 1520, the container 700 has increased compressive strength from above, improving strength as a container. Thus, the simple process of applying the masking layer 140 to the desired position on the adhesive layer 13 can increase the degree of freedom in designing the shape of the air circuit, and the strength of the container 700 can be set to the desired strength. can be easily done.

In addition, twisting occurs in the first film 11 in the process of forming the air circuit, and the twisting increases the strength of the container 700 . In addition, by further devising the shapes of the air circuit 142, the air circuit 144, and the air circuit 146, the strength of the container can be further increased.

Similarly, as another example, the air circuit 142 and the like shown in FIG. 15 can also be applied to the body portion of the container 110 shown in FIG. Also in this case, the air circuit 142 and the like help the container 110 to stand on its own and retain its shape.

FIG. 15 is an example of an air circuit according to the present disclosure, and air circuits of various shapes, positions, sizes, etc. can be provided as long as the above effects are achieved.

Another application example of the air circuit formed by the masking layer 140 will be described with reference to FIG. FIG. 16 is a diagram for explaining an application example of an air circuit formed by masking layers.

A container 160 in FIG. 16 is a soft packaging material container, and has a body portion 162, a top gusset 164, a bottom gusset (not shown), and a spout 166. The body portion 162 is formed by stacking two laminated films in which the first film 11 and the second film 12 are adhered, and bonding their peripheral portions together. The spout 166 is attached to the in-plane center of the top gusset 164 . Body 162 has air holes 14 and air circuits 168 formed by the method described with reference to FIGS. Air circuit 168 is the portion indicated by the gray area in FIG. The air circuit 168 is formed over substantially the entire surface of the body of the container 160 (including the back surface (not shown)). As described with reference to Figures 14 and 15, the air circuit can be formed in various shapes depending on the shape of the masking layer. Air circuits may also be formed in top gusset 164 and bottom gusset (not shown).

According to the above configuration, the air circuit 168 serves as an air column that enhances the structural strength of the container 160, and the independence of the container 160 can be enhanced. Further, since the air path 168 is formed in the body portion 162 of the container 160, the container 160 can maintain its independence without bending even when the contents in the container 160 decrease. In other words, the air circuit 168 also helps keep the shape of the container 160 .

Another application example of the air circuit formed by the masking layer 140 will be described with reference to FIG. FIG. 17 is a diagram for explaining still another application example of the air circuit formed by the masking layer.

A container 170 in FIG. 17 is a substantially legislative soft packaging material container. Container 170 may be a flexible packaging material container of other shapes, such as rectangular. As an example, the container 170 is formed by folding a laminate of the first film 11 and the second film 12 , bonding the peripheral edge portions of the inner surfaces of the laminate to each other, and heating the first film 11 .

The container 170 has an inner bag 176 inside which accommodates the contents. Further, the container 170 has a spout 174 on its top surface. Spout 174 connects with inner bladder 176 . Spout 174 may be the same as spout 166 of FIG. 16, or may be another type of spout.

A container 170 has an air circuit 172 formed by the method described with reference to FIGS. Air circuit 172 is the part indicated by the gray area in FIG. As shown in FIG. 17, air circuit 172 includes air circuit 172a, air circuit 172b, air circuit 172c, and air circuit 172d.

The air circuit 172 a is formed on the four sides of the top surface of the container 170 . The air circuit 172b is formed on the four sides of the bottom surface of the container 170. As shown in FIG. The air circuit 172c is formed on four sides connecting the top surface and the bottom surface of the container 170 . 172 d of air circuits are formed in the side surface of the container 170 by arbitrary shapes.

For the same reason as described above, the air circuit 172 becomes an air column that enhances the structural strength of the container 170. Specifically, the air circuit 172 a is a rectangular air circuit formed along the four sides of the top surface of the container 170 , and helps keep the shape of the top surface of the container 170 . The air circuit 172 b is a rectangular air circuit formed along the four sides of the bottom surface of the container 170 and helps keep the shape of the bottom surface of the container 170 . The air circuit 172c is a columnar air circuit formed on the side connecting the top surface and the bottom surface of the container 170, and helps increase the independence of the container 170. As shown in FIG. Therefore, the air circuit 172c prevents the container 170 from bending even when the content in the inner bag 176 is reduced, and helps keep the container 170 in shape. 172 d of air circuits are air circuits formed so that the 1st point and 2nd point in the four sides which demarcate the side surface of the container 170 may be connected. In the example shown in FIG. 17, the air circuit 172d is formed to connect the first vertex and the second vertex of a rectangle having four sides that define the sides of the container 170 and to traverse or traverse the sides. there is 172 d of air circuits are useful for shape retention of the side surface shape of the container 170. As shown in FIG.

Furthermore, since the air circuit 172 exerts a cushioning function when the container 170 is dropped, the drop strength of the container 170 can be increased. At this time, since the internal pressure applied to the air circuit 172 is low, the possibility of damage to the air circuit 172 when dropped can be maintained at a low level.

The air circuit 172 a may be formed on at least one of the four sides of the top surface of the container 170 . The air circuit 172 b may be formed on at least one side of the four sides of the bottom surface of the container 170 . The air circuit 172c may be formed on at least one side of the four sides connecting the top surface and the bottom surface of the container 170 . The air circuit 172 d may be formed on at least one of the four sides of the container 170 .

If the structural strength of the container 170 is sufficiently increased by the air circuit 172c, the container 170 may not include the air circuit 172a, the air circuit 172b, and/or the air circuit 172d. If air circuit 172d sufficiently increases the structural strength of container 170, container 170 may not include air circuit 172a, air circuit 172b, and/or air circuit 172c. These are just examples, and in the container 170, the position and/or the number of the air circuits 172 may be flexibly changed in consideration of the structural strength and/or the design of the final shape.

〔summary〕
The laminate according to aspect 1 of the present disclosure is bonded to the first film so that a first film having a first heat shrinkage rate and a non-bonded portion that is not bonded to the first film are present, and A second film having a second heat shrinkage rate lower than the first heat shrinkage rate, and a gas inlet for allowing gas to flow between the first film and the second film in the non-bonded portion. In addition, when the gas intake port is formed in the bonded portion where the first film and the second film are bonded, the non-contact film is provided except for the portion where the gas intake port is formed. The bond is surrounded by said bond.

According to the above configuration, in the laminate according to aspect 1 of the present disclosure, the second film having a second heat shrinkage rate lower than the first heat shrinkage rate is formed by heat shrinking the first film. 1 can be sagged away from the film. At this time, the gas can flow between the first film and the second film by flowing the gas from the gas intake port.

In this way, the laminate according to aspect 1 of the present disclosure includes an air blowing port (see the air blowing port 8 of Patent Document 2) for allowing gas to flow into the inside of the laminate, which was conventionally required, and air There is no need for equipment for sending the gas, and the gas can be easily made to flow into the inside of the laminate.

In the laminate according to aspect 2 of the present disclosure, in aspect 1, the first film has a first direction and a second direction perpendicular to the first direction, and the first film has a second direction perpendicular to the first direction. The heat shrinkage rate in one direction is higher than the heat shrinkage rate in the second direction, the first heat shrinkage rate is the heat shrinkage rate in the first direction, and at least a part of the non-bonded portion is flat. It has a shape extending along a second direction perpendicular to the first direction when viewed.

According to the above configuration, the laminate according to aspect 2 of the present disclosure can be used in a wide variety of applications by appropriately combining the shapes of the first film and the second film.

In the laminate according to aspect 3 of the present disclosure, in aspect 1 or 2, the first film or the second film has the gas intake port.

In the laminate according to aspect 4 of the present disclosure, in aspect 1 or 2, the adhesive part has the gas intake port.

According to the above configuration, the laminate according to aspect 3 or 4 of the present disclosure can be provided with gas intake ports at various positions on the first film, the second film, or the adhesive portion. As a result, the laminate according to aspect 3 or 4 of the present disclosure can be realized with various configurations depending on the application or manufacturing method of the laminate.

The laminate according to aspect 5 of the present disclosure is used as a tack label, packaging bag, tube container, or a part thereof in any one of aspects 1 to 4 above.

As described above, the laminate according to each aspect of the present disclosure can be widely used in various applications. As an example thereof, the laminate according to aspect 5 of the present disclosure can be used as a tack label, a packaging bag, a tube container, or a part thereof.

The laminate according to aspect 6 of the present disclosure, in any one of aspects 1 to 5, has a printed layer between the first film and the second film.

According to the above configuration, in the laminate according to aspect 6 of the present disclosure, the first film can maintain a flat surface, and as a result, the printed display of the printed layer can be maintained in an easy-to-read state without being distorted.

A package according to aspect 7 of the present disclosure is bonded to the first film so that a first film having a first heat shrinkage rate and a non-bonded portion that is not bonded to the first film are present, and By surrounding the non-bonded portion with a second film having a second heat shrinkage rate lower than the first heat shrinkage rate and a bonded portion where the first film and the second film are bonded and a formed gas enclosure.

The package according to aspect 7 of the present disclosure includes an air blowing port (see air blowing port 8 of Patent Document 2) for introducing air into the inside of the laminate, which was conventionally required, and an air blowing port for sending air. No equipment is required, and the gas can be easily made to flow into the inside of the laminate.

A package according to aspect 8 of the present disclosure is the aspect 7, wherein the first film has a first direction and a second direction perpendicular to the first direction, and the first film has a second direction perpendicular to the first direction; The heat shrinkage rate in one direction is higher than the heat shrinkage rate in the second direction, the first heat shrinkage rate is the heat shrinkage rate in the first direction, and at least a part of the non-bonded portion is flat. It has a shape extending along a second direction perpendicular to the first direction when viewed.

According to the above configuration, the package according to aspect 8 of the present disclosure can flexibly change the shape by appropriately combining the shapes of the first film and the second film. Thereby, the package according to aspect 8 of the present disclosure can be widely used for various purposes.

A package according to Aspect 9 of the present disclosure, in Aspect 7 or 8, has a gas inlet that communicates between the gas-filled portion and the outside of the package.

The package according to aspect 9 of the present disclosure may be used in a state in which the gas intake port is provided, or may be used in a state in which the gas intake port is closed and the gas intake port does not exist. may be The package according to aspect 9 of the present disclosure can bring such flexibility to the user depending on the intended use.

A method for manufacturing a package according to aspect 10 of the present disclosure includes a step of bonding a first film having a first heat shrinkage rate and a second film having a second heat shrinkage rate lower than the first heat shrinkage rate. a step of adhering the first film and the second film so that a non-adhered portion where the first film and the second film are not adhered is surrounded by an adhered portion where the first film and the second film are adhered; , shrinking the first film and allowing gas to flow in from a gas inlet formed in the non-adhesive portion, in that order.

A method for manufacturing a package according to aspect 11 of the present disclosure includes a step of bonding a first film having a first heat shrinkage rate and a second film having a second heat shrinkage rate lower than the first heat shrinkage rate. forming a non-bonded portion where the first film and the second film are not bonded and a bonded portion where the first film and the second film are bonded; a step of bonding such that the non-bonded portion is surrounded by the bonded portion while securing a gas intake port for introducing gas between the first film and the second film in the bonded portion; and, in that order, shrinking the film and allowing gas to flow through the gas inlet.

According to the above configuration, the method for manufacturing a package according to aspect 10 or 11 of the present disclosure includes an air blowing port for inflowing air into the inside of the laminate, which has been conventionally required, and It is possible to manufacture a package that does not require the equipment of

A method for manufacturing a package according to aspect 12 of the present disclosure includes the step of closing the gas intake port in aspect 10 or 11.

According to the above configuration, the gas can be prevented from flowing out of the package by closing the gas intake port.

A method for manufacturing a package according to Aspect 13 of the present disclosure is, in Aspect 12 above, wherein the gas intake port is closed with a closing member.

According to the above configuration, the package manufacturing method according to the thirteenth aspect of the present disclosure can easily close the gas intake port.

The present disclosure is not limited to the above-described embodiments, and various modifications are possible within the scope indicated in the claims. included in the scope. Furthermore, new technical features can be formed by combining the disclosed technical means.

1, 100, 125, 126, 130, 131, 300, 610, 620, 800 laminate 11 first films 12, 12a, 12b, 712 second films 13, 13a, 13b, 91 adhesive layers 14, 14a, 14b, 314 air hole (gas intake)
15 Bonded portion 16 Non-bonded portions 17, 17a, 17b Gas sealed portion 18 Printed layer 19a Reduced diameter portions 19b, 19c Body portion 19d Main body portion 19e Projection 19f Inner projections 40, 60 Closing member 61 Thermal adhesive 62 Sealant layer 90 adherend 105 handle 110, 160, 170, 700 container 120 tube 140 masking layer 142, 144, 146, 168, 172, 172a, 172b, 172c, 172d air circuit

Claims (13)

1. a first film having a first heat shrinkage;
   a second film that adheres to the first film such that there is a non-bonded portion that is not adhered to the first film, and has a second heat shrinkage rate lower than the first heat shrinkage rate;
   a gas intake port for introducing gas between the first film and the second film in the non-bonded portion;
   When the gas intake port is formed in the bonded portion where the first film and the second film are bonded, the non-bonded portion except for the portion where the gas intake port is formed is a laminate surrounded by the adhesive portion.
2. the first film has a first direction and a second direction perpendicular to the first direction;
   The heat shrinkage rate in the first direction of the first film is higher than the heat shrinkage rate in the second direction,
   The first thermal contraction rate is the thermal contraction rate in the first direction,
   2. The laminate according to claim 1, wherein at least part of said non-bonded portion has a shape extending along a second direction perpendicular to said first direction in plan view.
3. The laminate according to claim 1 or 2, wherein the first film or the second film has the gas intake port.
4. The laminate according to claim 1 or 2, wherein the adhesive portion has the gas intake port.
5. The laminate according to claim 1 or 2, which is used as a tack label, a packaging bag, a tube container, or a part thereof.
6. The laminate according to claim 1 or 2, having a printed layer between the first film and the second film.
7. a first film having a first heat shrinkage;
   a second film that adheres to the first film such that there is a non-bonded portion that is not adhered to the first film, and has a second heat shrinkage rate lower than the first heat shrinkage rate;
   and a gas-filled portion formed by surrounding the non-bonded portion with a bonded portion where the first film and the second film are bonded.
8. the first film has a first direction and a second direction perpendicular to the first direction;
   The heat shrinkage rate in the first direction of the first film is higher than the heat shrinkage rate in the second direction,
   The first thermal contraction rate is the thermal contraction rate in the first direction,
   The package according to claim 7, wherein at least part of said non-bonded portion has a shape extending along a second direction perpendicular to said first direction in plan view.
9. The package according to claim 7 or 8, having a gas intake opening for communication between the gas-filled portion and the outside of the package.
10. A step of bonding a first film having a first heat shrinkage rate and a second film having a second heat shrinkage rate lower than the first heat shrinkage rate, wherein the first film and the second film are bonded together. a step of adhering such that the non-adhered portion where the first film and the second film are not adhered is surrounded by the adhered portion where the first film and the second film are adhered;
    A method of manufacturing a package, comprising, in that order, the steps of shrinking the first film and allowing gas to flow in from a gas inlet formed in the non-bonded portion.
11. A step of bonding a first film having a first heat shrinkage rate and a second film having a second heat shrinkage rate lower than the first heat shrinkage rate, wherein the first film and the second film are bonded together. forms a non-adhesive portion where the first film and the second film are not adhered and an adhesive portion where the first film and the second film are adhered, and the first film and the second film in the non-adhesive portion a step of bonding such that the non-bonded portion is surrounded by the bonded portion while securing a gas intake port for introducing gas therebetween;
    A method of manufacturing a package, comprising, in that order, the steps of shrinking the first film and allowing gas to flow in from the gas inlet.
12. The method for manufacturing the package according to claim 10 or 11, comprising a step of closing the gas intake port.
13. The method for manufacturing the package according to claim 12, wherein the gas intake port is closed with a closing member.

Images