WO2023120636A1 - Stratifié, emballage et procédé de fabrication d'emballage - Google Patents

Stratifié, emballage et procédé de fabrication d'emballage Download PDF

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Publication number
WO2023120636A1
WO2023120636A1 PCT/JP2022/047328 JP2022047328W WO2023120636A1 WO 2023120636 A1 WO2023120636 A1 WO 2023120636A1 JP 2022047328 W JP2022047328 W JP 2022047328W WO 2023120636 A1 WO2023120636 A1 WO 2023120636A1
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WIPO (PCT)
Prior art keywords
film
laminate
air
container
gas
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PCT/JP2022/047328
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English (en)
Japanese (ja)
Inventor
俊 小田切
義則 稲川
理貴 櫻井
和也 高木
Original Assignee
株式会社フジシールインターナショナル
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Application filed by 株式会社フジシールインターナショナル filed Critical 株式会社フジシールインターナショナル
Publication of WO2023120636A1 publication Critical patent/WO2023120636A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
    • B29C61/02—Thermal shrinking
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes

Definitions

  • 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.
  • 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.
  • 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)
  • 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.
  • 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.
  • 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.
  • the non-bonded portion is surrounded by the bonded portion except for the portion where the bonding portion is attached.
  • 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 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.
  • 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.
  • FIG. 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. 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;
  • “Front” refers to the outer side
  • “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.
  • FIG. 1 shows a perspective view of a laminate 1 according to one aspect of the present disclosure.
  • 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.
  • 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.
  • gas for example, air
  • 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 .
  • 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.
  • 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.
  • first thermal shrinkage rate is not particularly limited, but is preferably 20% or more, more preferably 30% or more, and still more preferably. is 40% or more.
  • the upper limit of the thermal shrinkage in the first direction and the second direction is less than 100%.
  • 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 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.
  • 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
  • a heat-shrinkable synthetic resin film can be obtained by a known film-forming method.
  • 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.
  • 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).
  • 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 ⁇ m to 300 ⁇ m. In particular, when a synthetic resin film is used as the first film 11, its thickness is, for example, 10 ⁇ m to 100 ⁇ m.
  • the first film 11 may be transparent (colorless transparent or colored transparent) or non-transparent.
  • 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.
  • 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.
  • the second film 12 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.
  • 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.
  • 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.
  • the second film 12 is a synthetic resin film that does not substantially have heat shrinkability.
  • the material of the synthetic resin film 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.
  • 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
  • the thickness of the second film 12 is not particularly limited, and is, for example, 8 ⁇ m to 300 ⁇ m.
  • its thickness is, for example, 8 ⁇ m to 250 ⁇ m, preferably 12 ⁇ m to 200 ⁇ m.
  • the second film 12 may be transparent (colorless transparent or colored transparent) or non-transparent.
  • FIG. 2 shows a cross-sectional view of the laminate 1 shown in FIG. 1 taken along line AA.
  • 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.
  • an adhesive 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.
  • 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.
  • 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 .
  • 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 .
  • 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.
  • 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.
  • the first film 11 or the second film 12 has air holes 14 .
  • the air holes 14 are formed in the non-bonded portion 16 of the first film 11 or the second film 12 .
  • 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.
  • 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 .
  • 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 .
  • 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 .
  • 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 .
  • 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 .
  • FIG. 4 is a diagram showing how air flows into the laminate 1.
  • 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).
  • 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).
  • an appropriate method such as hot air, steam, or LED irradiation can be adopted.
  • 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.
  • 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).
  • 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).
  • a closing member 40 for example, a tack seal
  • 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.
  • the package formed by air flowing into the laminate 1 is obtained.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • the air holes 14 do not necessarily have to be closed.
  • 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 .
  • 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 .
  • 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.
  • container 700 can be used as a container for toiletries and the like.
  • 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).
  • the second film 712 swells in the direction away from the first film 11 (the inner direction of the container 700).
  • 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 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.
  • the container 700 can enhance the heat insulating effect of the container by having the gas filling portion 17 .
  • thermal insulation can be extremely useful.
  • the container 700 has the gas filling portion 17, so that the container 700 itself can be improved in self-reliance.
  • the container 700 has the gas-filled portion 17 as a handle, so that the container 700 can be easily gripped.
  • 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.
  • 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.
  • 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.
  • FIG. 8 is a schematic diagram of a laminate 800 according to the present disclosure, which is a variation of laminate 1 .
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • the adherend 90 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.
  • FIG. 10 is a schematic diagram of a container 110 according to the present disclosure.
  • container 110 is constructed primarily by laminate 100 in accordance with the present disclosure and has handle 105 as a structural component.
  • 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 .
  • the outermost layer is the first film 11
  • the main shrinkage direction of the first film 11 is the width direction of the container 110 (horizontal direction indicated by reference number 1000).
  • the printed layer 18 may be provided on the front side of the first film 11 .
  • 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 .
  • the laminate 100 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.
  • 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.
  • 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.).
  • 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 .
  • the first film 11 of the laminate 1 is heated.
  • 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.
  • 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.
  • the container 110 provided with the handle 105 using the laminate 1 or the like can be easily manufactured.
  • the laminate 1 and the like that function as the handle 105 can be easily retrofitted to the separately manufactured container 110 .
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the laminate according to the present disclosure can be used as a tack label, packaging bag, tube container, or part thereof.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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. 13
  • 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.
  • 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.
  • the first film 11 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.
  • 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.
  • 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.
  • the laminate 125, the laminate 126, the laminate 130, and/or the laminate 131 may be used as follows.
  • a laminate 125 shown in FIG. 12 is used instead of the handle 105 of FIG. 10.
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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. 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.
  • 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.
  • 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 .
  • 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.
  • 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.
  • 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.
  • 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 .
  • the container 700 has increased compressive strength from above, improving strength as a container.
  • 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.
  • 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 .
  • the strength of the container can be further increased.
  • 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.
  • 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).
  • 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 .
  • 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.
  • 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.
  • 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.
  • the air circuit 172 becomes an air column that enhances the structural strength of the container 170.
  • 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.
  • 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.
  • 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.
  • 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 .
  • 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.
  • 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.
  • the non-contact film is provided except for the portion where the gas intake port is formed. The bond is surrounded by said bond.
  • 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.
  • 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.
  • 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
  • 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.
  • 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.
  • the first film or the second film has the gas intake port.
  • the adhesive part has the gas intake port.
  • 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.
  • 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.
  • the laminate according to each aspect of the present disclosure can be widely used in various applications.
  • 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.
  • 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.
  • 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.
  • 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.
  • 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.
  • the package manufacturing method according to the thirteenth aspect of the present disclosure can easily close the gas intake port.

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  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Abstract

Ce stratifié (1) comprend un premier film (11) ayant un premier taux de retrait thermique, un second film (12) ayant un second taux de retrait thermique inférieur au premier taux de retrait thermique, et un trou d'air (14) à travers lequel de l'air peut circuler entre le premier film (11) et le second film (12) au niveau d'une partie non liée (16). Dans une situation dans laquelle le trou d'air (14) est formé dans une partie liée (15) où le premier film (11) et le second film (12) sont liés ensemble, la partie non liée (16) est entourée par la partie liée à l'exception de l'endroit où est formé le trou d'air (14).
PCT/JP2022/047328 2021-12-24 2022-12-22 Stratifié, emballage et procédé de fabrication d'emballage WO2023120636A1 (fr)

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JP2021-211254 2021-12-24

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013224164A (ja) * 2012-04-20 2013-10-31 Hosokawa Yoko Co Ltd 包装体
WO2014115558A1 (fr) * 2013-01-25 2014-07-31 凸版印刷株式会社 Corps d'emballage flexible
JP2018154393A (ja) * 2017-03-21 2018-10-04 大倉工業株式会社 包装袋、該袋を用いた包装体の製造方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013224164A (ja) * 2012-04-20 2013-10-31 Hosokawa Yoko Co Ltd 包装体
WO2014115558A1 (fr) * 2013-01-25 2014-07-31 凸版印刷株式会社 Corps d'emballage flexible
JP2018154393A (ja) * 2017-03-21 2018-10-04 大倉工業株式会社 包装袋、該袋を用いた包装体の製造方法

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