WO2023276959A1 - ラミネートチューブ用積層体及びラミネートチューブ - Google Patents
ラミネートチューブ用積層体及びラミネートチューブ Download PDFInfo
- Publication number
- WO2023276959A1 WO2023276959A1 PCT/JP2022/025589 JP2022025589W WO2023276959A1 WO 2023276959 A1 WO2023276959 A1 WO 2023276959A1 JP 2022025589 W JP2022025589 W JP 2022025589W WO 2023276959 A1 WO2023276959 A1 WO 2023276959A1
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- WO
- WIPO (PCT)
- Prior art keywords
- layer
- laminate
- heat
- thickness
- seal layer
- Prior art date
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- 229920000098 polyolefin Polymers 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 24
- 238000009820 dry lamination Methods 0.000 claims abstract description 11
- 239000010410 layer Substances 0.000 claims description 149
- 239000012793 heat-sealing layer Substances 0.000 claims description 37
- 229910052809 inorganic oxide Inorganic materials 0.000 claims description 27
- -1 polypropylene Polymers 0.000 claims description 26
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- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 2
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- WSSSPWUEQFSQQG-UHFFFAOYSA-N 4-methyl-1-pentene Chemical compound CC(C)CC=C WSSSPWUEQFSQQG-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 2
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
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- 239000004808 2-ethylhexylester Substances 0.000 description 1
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Images
Classifications
-
- 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
- B65D35/00—Pliable tubular containers adapted to be permanently or temporarily deformed to expel contents, e.g. collapsible tubes for toothpaste or other plastic or semi-liquid material; Holders therefor
- B65D35/02—Body construction
- B65D35/10—Body construction made by uniting or interconnecting two or more components
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B1/00—Layered products having a non-planar shape
- B32B1/08—Tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/30—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers
- B32B27/306—Layered products comprising a layer of synthetic resin comprising vinyl (co)polymers; comprising acrylic (co)polymers comprising vinyl acetate or vinyl alcohol (co)polymers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/70—Other properties
- B32B2307/732—Dimensional properties
- B32B2307/737—Dimensions, e.g. volume or area
- B32B2307/7375—Linear, e.g. length, distance or width
- B32B2307/7376—Thickness
Definitions
- the present invention relates to laminates for laminate tubes and laminate tubes.
- the cylindrical sleeve that forms the body of the laminate tube is formed by welding and joining the ends (side seams) of the resin material of the original sheet.
- the welded ends are distorted due to rapid heating and cooling during welding, so the resin around the weld (non-side-seam part) is pulled, the side-seam part becomes convex, and the cross-section of the sleeve becomes egg-shaped. wind.
- it is preferable to correct such a distorted cross section of the sleeve so as to approach a perfect circle.
- a tube container manufacturing method including a step of blowing steam onto the outer circumference of the sleeve has been proposed in a method of manufacturing a tube including a step of welding a molded body (see, for example, Patent Document 1).
- the present invention has been made in view of the circumstances described above, and an object of the present invention is to provide a laminated body for a laminate tube, which enables obtaining a cylindrical sleeve having good roundness. Another object of the present invention is to provide a laminate tube formed from the laminate for laminate tube.
- a laminate for a laminate tube includes a first heat-sealing layer, a base layer, and a second heat-sealing layer, and the first heat-sealing layer, the base layer, and the second heat-sealing layer.
- the heat-sealing layer contains polyolefin
- the first heat-sealing layer, the second heat-sealing layer, and the base layer are laminated by a dry lamination method, and the thickness of the second heat-sealing layer with respect to the thickness of the first heat-sealing layer
- the heat seal layer has a thickness ratio of 0.9 to 1.1 and a thickness of 180 to 300 ⁇ m.
- the laminated tube laminate has a specific layer structure and thickness, and each layer is laminated by a specific lamination method. As a result, a cylindrical sleeve having good roundness can be obtained in the tube molding process. Since the sleeve has good roundness, it is possible to suppress filling failures when filling the contents, and obtain a laminate tube that is excellent in self-supporting property, squeezability, and the like. Moreover, it can be said that the laminate tube laminate, in which the first heat-sealing layer, the base material layer, and the second heat-sealing layer all contain polyolefin, has excellent recyclability.
- good roundness means that when a cylindrical sleeve is produced using the laminated body for a laminate tube, the cross-sectional shape of the sleeve is little distorted from a perfect circle.
- the laminate for laminate tube may further include an inorganic oxide layer on the base material layer.
- the inorganic oxide layer may contain aluminum oxide or silicon oxide.
- the polyolefin may be polypropylene.
- the polyolefin content may be 90% by mass or more based on the total amount of the laminate.
- the laminate for a laminate tube may further include an adhesive layer between the first heat-sealing layer and the second heat-sealing layer and the substrate layer.
- the Tg of the adhesive layer may be 20° C. or higher.
- a laminate tube according to one aspect of the present invention includes the laminate for laminate tube described above.
- the present invention it is possible to provide a laminated tube laminate from which a cylindrical sleeve having good roundness can be obtained. Moreover, according to this invention, the laminate tube formed from the said laminated body for laminate tubes can be provided.
- FIG. 1 is a schematic cross-sectional view showing a laminate for a laminate tube according to one embodiment.
- FIG. 2 is a schematic cross-sectional view showing a laminate for a laminate tube according to another embodiment.
- FIG. 3 is a front view showing a laminate tube according to one embodiment.
- FIG. 1 is a schematic cross-sectional view showing a laminate for a laminate tube according to one embodiment.
- a laminated body 10 for a laminate tube comprises a first heat-sealing layer 1 , a substrate layer 2 and a second heat-sealing layer 3 .
- a laminated body for a laminated tube may be simply referred to as a laminated body.
- FIG. 2 is a schematic cross-sectional view showing a laminate tube laminate according to another embodiment.
- a laminate tube laminate 20 includes a first heat-sealing layer 1 , a base material layer 2 , an inorganic oxide layer 4 and a second heat-sealing layer 3 .
- the thickness of the laminate is 180-300 ⁇ m, may be 200-280 ⁇ m, or may be 200-250 ⁇ m.
- the thickness of the laminate for a laminate tube is at least the above lower limit, good roundness can be maintained during sleeve formation, and good stiffness can be easily obtained.
- the thickness is equal to or less than the above upper limit, it is possible to obtain a laminate tube that is compatible with both squeezeability and self-standing.
- the first heat-sealing layer and the second heat-sealing layer of the laminate and the base material layer are laminated by a dry lamination method.
- the laminate is obtained by thermocompression bonding the first heat-sealing layer and the second heat-sealing layer via the adhesive layer formed on the substrate layer.
- the laminate obtained by dry lamination comprises an adhesive layer between the first heat-sealable layer and the second heat-sealable layer and the substrate layer.
- the adhesive layer is formed by applying an adhesive onto the substrate layer by a coating method such as roll coating, gravure coating, kiss coating, or a printing method, followed by drying.
- the amount of the adhesive used (the weight of the adhesive layer) is not particularly limited, but it can be 0.1 to 10 g/m 2 in a dry state, and may be 1 to 5 g/m 2 .
- the first heat-sealing layer, the base layer, and the second heat-sealing layer may all contain polyolefin, and all may contain polypropylene or polyethylene, and all contain polypropylene.
- the polyolefin content may be 90% by mass or more, or 95% by mass or more, based on the total amount of the laminate. Although the upper limit of the polyolefin content is not particularly limited, it can be 98% by mass from the viewpoint of recyclability.
- the base layer contains polyolefin.
- a uniaxially stretched or biaxially stretched polyolefin film can be used as the substrate layer.
- the substrate layer can be referred to as a stretched substrate.
- the polyolefin is not particularly limited and includes, for example, polyethylene, polypropylene, polybutene, cycloolefin polymer, and the like.
- Polypropylene can be used as the polyolefin from the viewpoint of recyclability and high-temperature treatment resistance.
- the polypropylene may be homopolymer, random copolymer or block copolymer.
- the polypropylene homopolymer is a homopolymer of propylene
- the polypropylene random copolymer is a mixture of propylene and other ⁇ -olefins other than propylene (eg, ethylene, butene-1, 4-methyl-1-pentene, etc.).
- a polypropylene block copolymer, which is a random copolymer is a copolymer having a polymer block composed of propylene and a polymer block composed of an ⁇ -olefin other than the above-mentioned propylene.
- homopolymers or random copolymers can be used from the viewpoint of transparency.
- a homopolymer can be used when importance is placed on the rigidity, heat resistance, etc. of the laminate, and a random copolymer can be used when importance is placed on impact resistance, etc.
- biomass-derived polypropylene may be used as the polypropylene.
- mechanically recycled or chemically recycled polypropylene may be used as the polypropylene.
- the base layer may be composed of a single layer containing polyolefin, or may be composed of multiple layers containing polyolefin.
- the material of each layer may be the same or different.
- each layer may be laminated by dry lamination.
- At least one layer among the layers constituting the base material layer may be a support layer for the inorganic oxide layer (a layer for forming the inorganic oxide layer).
- the base material layer contains anti-blocking agents, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, inorganic fillers, organic fillers, dyes, pigments, etc., as long as the desired effect is exhibited. be able to.
- the content of polyolefin in the base material layer can be 85% by mass or more, and may be 95% by mass or more.
- the base layer may be surface-treated. This can improve adhesion with adjacent layers.
- the method of surface treatment is not particularly limited, and examples include corona discharge treatment, ozone treatment, low-temperature plasma treatment using oxygen gas and/or nitrogen gas, physical treatment such as glow discharge treatment, and oxidation using chemicals. Chemical treatments such as treatments can be mentioned.
- the thickness of the base material layer (the total thickness when multiple layers are provided) may be 15 to 70 ⁇ m, may be 15 to 50 ⁇ m, or may be 20 to 40 ⁇ m. When the thickness of the base material layer is within the above range, processing such as printing and lamination is facilitated.
- the first heat seal layer and the second heat seal layer comprise polyolefin.
- the first heat-seal layer and the second heat-seal layer may be collectively called a heat-seal layer.
- the heat-sealing layer can be said to be a surface base material layer having heat-sealing properties.
- the polyolefin is not particularly limited, and examples thereof include polyethylene and polypropylene. From the viewpoint of recyclability, polypropylene can be used as the polyolefin.
- polyethylene examples include low-density polyethylene resin (LDPE), linear low-density polyethylene resin (LLDPE), medium-density polyethylene resin (MDPE), ethylene/vinyl acetate copolymer, ethylene/ ⁇ -olefin copolymer, and the like. .
- LDPE low-density polyethylene resin
- LLDPE linear low-density polyethylene resin
- MDPE medium-density polyethylene resin
- ethylene/vinyl acetate copolymer examples of polyethylene
- unstretched polypropylene can be used from the viewpoint of recyclability.
- polypropylene include homopolymers of propylene, copolymers of propylene and unsaturated carboxylic acids, copolymers of propylene and unsaturated carboxylic acid esters, propylene/ ⁇ -olefin copolymers, and ethylene-propylene copolymers. Coalesced random copolymers or block copolymers, and the like.
- unsaturated carboxylic acids include acrylic acid, methacrylic acid, maleic anhydride, and fumaric acid, and one or more of these can be used for copolymerization with propylene.
- unsaturated carboxylic acid esters include acrylic acid esters, methacrylic acid esters, maleic anhydride esters, and fumaric acid esters, and one or more of these can be used for copolymerization with propylene.
- biomass-derived polyethylene or polypropylene or mechanically recycled polyethylene or polypropylene may be used.
- the heat seal layer may be composed of a single layer containing polyolefin, or may be composed of multiple layers containing polyolefin. When the heat seal layer is composed of multiple layers, each layer may be laminated by co-extrusion, and the materials of each layer may be the same or different.
- the heat seal layer contains antiblocking agents, antioxidants, ultraviolet absorbers, antistatic agents, flame retardants, inorganic fillers, organic fillers, dyes, pigments, etc., as long as the desired effects are exhibited. be able to.
- the content of polyolefin in the heat seal layer can be 85% by mass or more, and may be 95% by mass or more.
- the thickness of the heat seal layer can be 50-120 ⁇ m, and may be 70-110 ⁇ m.
- the thickness of the heat seal layer is at least the above lower limit, sufficient sealing strength and excellent self-supporting property can be easily obtained, and when it is at most the above upper limit, excellent squeezability in the laminated tube can be easily obtained. .
- the ratio of the thickness of the second heat-sealing layer to the thickness of the first heat-sealing layer is 0.9-1.1, and 0.95-1. It may be 0.05 or 1.
- the laminate may further comprise an inorganic oxide layer on the substrate layer.
- the inorganic oxide layer can be said to be a barrier layer, and the inorganic oxide layer further suppresses the permeation of oxygen and water vapor, thereby further improving the storage stability of the contents.
- the inorganic oxide layer can be provided on the surface of the substrate layer opposite to the content from the viewpoint of barrier properties.
- the inorganic oxide layer can contain aluminum oxide or silicon oxide.
- Metal detectors can be used to inspect for metallic contaminants after the contents are filled and packaged, as compared to a mode using a metal layer such as an aluminum foil or an aluminum deposited film.
- the inorganic oxide layer may be a layer (transparent or translucent) that sufficiently transmits visible light. This makes it easy to visually recognize the color and transparency of the contents from the outside.
- a film having an inorganic oxide layer on a support layer for the inorganic oxide layer can be referred to as a transparent barrier film.
- the inorganic oxide layer may be an inorganic oxide deposition layer. That is, the inorganic oxide layer may be formed on the surface of the substrate layer by a vapor deposition method such as a physical vapor deposition method or a chemical vapor deposition method.
- a barrier overcoat layer is formed on the inorganic oxide layer by a coating method such as roll coating, gravure roll coating, or kiss coating, or a printing method such as gravure printing, offset printing, or transfer printing. may be formed.
- the thickness of the inorganic oxide layer can be 10-100 nm, and may be 20-50 nm.
- the thickness of the inorganic oxide layer is at least the above lower limit, it becomes easy to exhibit sufficient barrier properties, and when it is at most the above upper limit, it becomes easy to suppress deterioration of the barrier properties due to cracks.
- the first heat-sealing layer, the second heat-sealing layer, and the substrate layer are laminated by a dry lamination method. That is, it can be said that the laminate comprises an adhesive layer (adhesive layer for dry lamination) between the first heat-seal layer and the second heat-seal layer and the substrate layer.
- adhesives contained in the adhesive layer include polyvinyl acetate-based adhesives; homopolymers such as acrylic acid ethyl ester, butyl ester, and 2-ethylhexyl ester; Polyacrylic ester-based adhesives made of copolymers, etc.; cyanoacrylate-based adhesives, ethylene copolymer-based adhesives made of copolymers of ethylene and monomers such as vinyl acetate, ethyl acrylate, acrylic acid, and methacrylic acid.
- Agent Cellulose adhesive; Polyester adhesive; Polyamide adhesive; Polyimide adhesive; Amino resin adhesive made of urea resin, melamine resin, etc.; Agent: Reactive (meth)acrylic acid-based adhesives and the like.
- Polyurethane-based adhesives can be used as the adhesive from the viewpoint of forming an adhesive layer with excellent flexibility and flexibility.
- polyether polyurethane-based resin, polyester polyurethane-based resin, and polyacrylate polyurethane-based resin are the main components can be used.
- a polyurethane-based adhesive it is easy to improve processing aptitude such as lamination processing and printing processing.
- Aqueous type, solution type, emulsion type, dispersion type, etc. can be mentioned as examples of adhesives.
- the form of the adhesive includes film, sheet, powder, solid, and the like.
- Reaction mechanisms of adhesives include a chemical reaction type, a solvent volatilization type, a thermal adhesion type, a heat pressure type, and the like.
- a non-solvent laminate that does not contain an organic solvent component is preferable from the viewpoint of environmental friendliness.
- the adhesive layer preferably has a certain degree of heat resistance.
- a polyolefin material used in a laminate tends to be difficult to maintain its shape against heat of, for example, about 40 to 50° C. applied during production of the laminate. Therefore, the shape stability of the laminate containing the polyolefin material can be further improved by providing the adhesive layer with a certain level of heat resistance (difficulty in softening).
- the Tg of the adhesive layer may be 20° C. or higher, may be 30° C. or higher, or may be 40° C. or higher.
- the upper limit of Tg is not particularly limited, but if the Tg of the adhesive layer is too high, the initial adhesion tends to be weak, so it can be about 100°C.
- Tg is a value measured in accordance with JIS K7121 Plastic glass transition temperature measurement method.
- the laminate may further include a printed layer on the surface of the substrate layer.
- the print layer contains images made up of letters, patterns, symbols and combinations thereof.
- the method for forming the printed layer is not particularly limited, and conventionally known printing methods such as gravure printing, offset printing, and flexographic printing can be used.
- the printed layer can be provided on the surface of the base material layer facing the inorganic oxide layer.
- the laminate can be used for the body of a laminate tube. That is, the laminate tube includes the laminate for laminate tube described above. A laminated tube can also be called a tube container.
- FIG. 3 is a front view showing a laminate tube according to one embodiment.
- a laminate tube 500 shown in FIG. 3 includes a body portion 510 made of the laminate, an outlet portion 520 attached to one end of the body portion 510 , and a cap 530 attached to the outlet portion 520 .
- the trunk portion 510 is formed by bonding the heat-sealed layers of the laminate together at the sealing portion 513 and closing the bottom portion 511 located at the other end opposite to the one end to which the spout portion 520 is attached. It is a cylindrical member formed so as to be able to accommodate the .
- the spout portion 520 is composed of a spout portion 522 for discharging the contents and a shoulder portion 521 held by the trunk portion 510 for guiding the contents to the spout portion 522 .
- the cap 530 is a member that enables closing and opening of the opening of the plug portion 522 .
- the shape of the laminated tube it is also possible to set the shoulder part perpendicular to the body part without taper so that the contents can be squeezed out to the end.
- Materials for the spout portion and the cap of the laminate tube are not particularly limited, but by using the same resin as the substrate layer and the heat seal layer, the recyclability can be further improved.
- invention 1 comprising a first heat-sealing layer, a substrate layer, and a second heat-sealing layer;
- the first heat-seal layer, the base layer, and the second heat-seal layer comprise polyolefin,
- the first heat seal layer and the second heat seal layer, and the base layer are laminated by a dry lamination method,
- the ratio of the thickness of the second heat seal layer to the thickness of the first heat seal layer is 0.9 to 1.1
- a laminate for a laminate tube having a thickness of 180 to 300 ⁇ m.
- the laminate for a laminate tube according to invention 1 further comprising an inorganic oxide layer on the base material layer.
- Example 1 ⁇ Preparation of laminate for laminate tube> (Example 1) A 20 ⁇ m thick OPP film (U-1, manufactured by Mitsui Chemicals Tocello Co., Ltd.) and a 18 ⁇ m thick OPP film (manufactured by Toppan Printing Co., Ltd.) provided with a 50 nm thick silicon oxide vapor deposition layer. , were laminated by dry lamination via an adhesive. A CPP film (UT100, manufactured by Okamoto Co., Ltd.) having a thickness of 100 ⁇ m was laminated as a heat seal layer on both sides of the laminate by dry lamination via an adhesive.
- U-1 manufactured by Mitsui Chemicals Tocello Co., Ltd.
- 18 ⁇ m thick OPP film manufactured by Toppan Printing Co., Ltd.
- Second heat seal layer thickness/first heat seal layer thickness was 1.
- Example 2 A 18 ⁇ m thick OPP film (manufactured by Max Specialty Films, TI) was used instead of a 20 ⁇ m thick OPP film, and a 80 ⁇ m thick CPP film (manufactured by Toray Industries, Inc., ZK99S) was used instead of a 100 ⁇ m thick CPP film. ) was used to obtain a laminate in the same manner as in Example 1. Second heat seal layer thickness/first heat seal layer thickness was 1.
- Example 3 Lamination was performed in the same manner as in Example 1 except that the 20 ⁇ m thick OPP film was not used and the 120 ⁇ m thick CPP film (manufactured by Toray Industries, Inc., ZK99S) was used instead of the 100 ⁇ m thick CPP film. got a body Second heat seal layer thickness/first heat seal layer thickness was 1.
- Example 1 A laminate was obtained in the same manner as in Example 1 except that a 60 ⁇ m thick CPP film (manufactured by Toray Industries, Inc., ZK99S) was used instead of the 100 ⁇ m thick CPP film. Second heat seal layer thickness/first heat seal layer thickness was 1.
- Example 3 Example 3 except that a 60 ⁇ m thick CPP film (manufactured by Toray Industries, Inc., ZK207) and a 200 ⁇ m thick CPP film (manufactured by Okamoto Co., Ltd., AT40S) were used instead of the 120 ⁇ m thick CPP film.
- a laminate was obtained in the same manner.
- the second heat seal layer thickness/first heat seal layer thickness was about 3.3.
- Example 3 A laminate was obtained in the same manner as in Example 3, except that a 160 ⁇ m thick CPP film (manufactured by Toray Industries, Inc., ZK207) was used instead of the 120 ⁇ m thick CPP film. Second heat seal layer thickness/first heat seal layer thickness was 1.
- a 120 ⁇ m thick PE film (manufactured by Mitsui Chemicals Tohcello Co., Ltd., FC-S) was dry-laminated via an adhesive in the same manner as in Example 1 on a 12 ⁇ m thick PET film provided with a silicon oxide deposition layer. Laminated by A laminate was thus obtained.
- SYMBOLS 1 First heat-sealing layer, 2... Base material layer, 3... Second heat-sealing layer, 4... Inorganic oxide layer, 10, 20... Laminated tube laminate, 510... Body part, 511... Bottom part, 513... Seal part, 520... Spout part, 521... Shoulder part, 522... Plug part, 530... Cap, 500... Laminated tube.
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Abstract
Description
図1は、一実施形態に係るラミネートチューブ用積層体を示す模式断面図である。ラミネートチューブ用積層体10は、第一のヒートシール層1、基材層2、及び第二のヒートシール層3を備える。ラミネートチューブ用積層体を単に積層体と言う場合がある。
基材層はポリオレフィンを含む。基材層としては、一軸延伸又は二軸延伸のポリオレフィンフィルムを用いることができる。この場合、基材層は延伸基材と言うことができる。
第一のヒートシール層及び第二のヒートシール層はポリオレフィンを含む。第一のヒートシール層及び第二のヒートシール層をまとめてヒートシール層と言う場合がある。ヒートシール層は、ヒートシール性を有する表面基材層と言うことができる。
積層体は、基材層上に無機酸化物層を更に備えてよい。無機酸化物層はバリア層と言うことができ、無機酸化物層により、酸素及び水蒸気の透過がより抑制されるため、内容物の保存安定性がより向上する。積層体からラミネートチューブの胴部を形成する場合、バリア性の観点から、無機酸化物層は基材層の内容物とは反対側の面上に設けることができる。
積層体において、第一のヒートシール層及び第二のヒートシール層と、基材層とはドライラミネート法により積層されている。すなわち、積層体は、第一のヒートシール層及び第二のヒートシール層と、基材層との間に接着層(ドライラミネート用接着層)を備えると言うことができる。
積層体は、基材層の表面に更に印刷層を備えてよい。印刷層は文字、柄、記号及びこれらの組み合わせからなる画像を含む。印刷層の形成方法としては、特に限定されるものではなく、グラビア印刷法、オフセット印刷法、フレキソ印刷法等の従来公知の印刷法を挙げることができる。
上記積層体は、ラミネートチューブの胴部に用いることができる。すなわちラミネートチューブは、上記ラミネートチューブ用積層体を備える。ラミネートチューブはチューブ容器と言うこともできる。
[発明1]
第一のヒートシール層、基材層、及び第二のヒートシール層を備え、
前記第一のヒートシール層、前記基材層、及び前記第二のヒートシール層がポリオレフィンを含み、
前記第一のヒートシール層及び前記第二のヒートシール層と、前記基材層とがドライラミネート法により積層されており、
前記第一のヒートシール層の厚さに対する前記第二のヒートシール層の厚さの割合が0.9~1.1であり、
厚さが180~300μmである、ラミネートチューブ用積層体。
[発明2]
前記基材層上に無機酸化物層を更に備える、発明1に記載のラミネートチューブ用積層体。
[発明3]
前記無機酸化物層が酸化アルミニウム又は酸化ケイ素を含む、発明2に記載のラミネートチューブ用積層体。
[発明4]
前記ポリオレフィンがポリプロピレンである、発明1~3のいずれか一に記載のラミネートチューブ用積層体。
[発明5]
前記ポリオレフィンの含有量が、積層体の全量を基準として90質量%以上である、発明1~4のいずれか一に記載のラミネートチューブ用積層体。
[発明6]
前記第一のヒートシール層及び前記第二のヒートシール層と前記基材層との間に、接着層を更に備え、前記接着層のTgが20℃以上である、請求項1~5のいずれか一に記載のラミネートチューブ用積層体。
[発明7]
発明1~6のいずれか一に記載のラミネートチューブ用積層体を備える、ラミネートチューブ。
(実施例1)
厚さ20μmのOPPフィルム(三井化学東セロ株式会社製、U-1)と、厚さ50nmの酸化ケイ素蒸着層を設けた厚さ18μmのOPPフィルム(凸版印刷株式会社製)の酸化ケイ素蒸着層面と、を接着剤を介してドライラミネートにより積層した。その両面に、ヒートシール層として厚さ100μmのCPPフィルム(オカモト株式会社製、UT100)を、それぞれ接着剤を介してドライラミネートにより積層した。接着剤として、二液反応型ポリエステルポリウレタン系樹脂(三井化学株式会社製、A626/A50、接着層形成後のTg:26℃)を用い、接着剤の使用量は3.5g/m2(乾燥状態)とした。これにより、ラミネートチューブ用積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは1であった。
厚さ20μmのOPPフィルムに代えて厚さ18μmのOPPフィルム(マックススペシャリティフィルムズ製、TI)を用いたこと、厚さ100μmのCPPフィルムに代えて厚さ80μmのCPPフィルム(東レ株式会社製、ZK99S)を用いたこと以外は、実施例1と同様にして積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは1であった。
厚さ20μmのOPPフィルムを用いなかったこと、厚さ100μmのCPPフィルムに代えて厚さ120μmのCPPフィルム(東レ株式会社製、ZK99S)を用いたこと以外は、実施例1と同様にして積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは1であった。
厚さ100μmのCPPフィルムに代えて厚さ60μmのCPPフィルム(東レ株式会社製、ZK99S)を用いたこと以外は、実施例1と同様にして積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは1であった。
厚さ120μmのCPPフィルムに代えて、厚さ60μmのCPPフィルム(東レ株式会社製、ZK207)及び厚さ200μmのCPPフィルム(オカモト株式会社製、AT40S)を用いたこと以外は、実施例3と同様にして積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは約3.3であった。
厚さ120μmのCPPフィルムに代えて、厚さ160μmのCPPフィルム(東レ株式会社製、ZK207)を用いたこと以外は、実施例3と同様にして積層体を得た。第二のヒートシール層厚さ/第一のヒートシール層厚さは1であった。
厚さ150μmのPEフィルム(三井化学東セロ株式会社製、FC-S)と、厚さ12μmのPETフィルムと、厚さ50nmの酸化ケイ素蒸着層を設けた厚さ12μmのPETフィルム(凸版印刷株式会社製)とを、各層間に厚さ40μmのLDPE(日本ポリエチレン株式会社製、LC600A)を用いて押出しラミネートで積層した。
酸化ケイ素蒸着層を設けた厚さ12μmのPETフィルム上に、厚さ120μmのPEフィルム(三井化学東セロ株式会社製、FC-S)を、実施例1と同様にして接着剤を介してドライラミネートにより積層した。これにより積層体を得た。
各例で得られた積層体に対し、以下の評価を行った。結果を表1に示す。表1の「構成」の欄における「//」は、無機酸化物層の位置を示す。
各例で得られた積層体のMD及びTDの両方向から、幅15mm、長さ50mmの短冊状フィルムを切り出した。切り出した短冊状フィルムを、株式会社東洋精機製作所製のループスティフネステスターにセットし、室温(25℃)にて押し込み量10mmで反発力を測定した。この測定を、サンプルを変えて5回行った。測定で得られた反発力の値(mN)の平均値を、腰強度(ループスティフネス)とした。
各例で得られた積層体を用いて、筒状のスリーブを10個作製した。表1の「構成」の欄において左側に記載された層がスリーブの外面になるように積層体を用いた。スリーブ断面が真円となったときのスリーブ内径(直径)が35mmとなるように設計した。積層体の重なり幅は2mmとした。
室温(25℃)にてスリーブ断面の最大内径(楕円長軸方向)Ammを測定し、スリーブ断面が真円の場合の内径35mmに対する内径の増加割合(%)を算出した。この作業を、スリーブを変えて10回行った。そして、算出された増加割合の値の平均値を楕円率(%)とした。これを真円度の評価に用いた。
楕円率(%)=100×(A-35)/35
Claims (7)
- 第一のヒートシール層、基材層、及び第二のヒートシール層を備え、
前記第一のヒートシール層、前記基材層、及び前記第二のヒートシール層がポリオレフィンを含み、
前記第一のヒートシール層及び前記第二のヒートシール層と、前記基材層とがドライラミネート法により積層されており、
前記第一のヒートシール層の厚さに対する前記第二のヒートシール層の厚さの割合が0.9~1.1であり、
厚さが180~300μmである、ラミネートチューブ用積層体。 - 前記基材層上に無機酸化物層を更に備える、請求項1に記載のラミネートチューブ用積層体。
- 前記無機酸化物層が酸化アルミニウム又は酸化ケイ素を含む、請求項2に記載のラミネートチューブ用積層体。
- 前記ポリオレフィンがポリプロピレンである、請求項1又は2に記載のラミネートチューブ用積層体。
- 前記ポリオレフィンの含有量が、積層体の全量を基準として90質量%以上である、請求項1又は2に記載のラミネートチューブ用積層体。
- 前記第一のヒートシール層及び前記第二のヒートシール層と前記基材層との間に、接着層を更に備え、前記接着層のTgが20℃以上である、請求項1又は2に記載のラミネートチューブ用積層体。
- 請求項1又は2に記載のラミネートチューブ用積層体を備える、ラミネートチューブ。
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JP2020157505A (ja) * | 2019-03-25 | 2020-10-01 | 共同印刷株式会社 | ラミネートチューブ原反 |
JP2021053861A (ja) * | 2019-09-27 | 2021-04-08 | 大日本印刷株式会社 | 積層体およびチューブ容器 |
WO2021070198A1 (en) * | 2019-10-07 | 2021-04-15 | Epl Limited | A lamitube and implementations thereof |
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2022
- 2022-06-27 EP EP22833106.2A patent/EP4364943A1/en active Pending
- 2022-06-27 WO PCT/JP2022/025589 patent/WO2023276959A1/ja active Application Filing
- 2022-06-27 CN CN202280044572.2A patent/CN117545631A/zh active Pending
- 2022-06-27 JP JP2023531946A patent/JPWO2023276959A1/ja active Pending
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2023
- 2023-12-28 US US18/398,351 patent/US20240140064A1/en active Pending
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WO2020193562A1 (en) * | 2019-03-27 | 2020-10-01 | Albea Services | Laminated material for forming a flexible container and flexible tube skirt comprising said laminated material |
JP2021053861A (ja) * | 2019-09-27 | 2021-04-08 | 大日本印刷株式会社 | 積層体およびチューブ容器 |
WO2021070198A1 (en) * | 2019-10-07 | 2021-04-15 | Epl Limited | A lamitube and implementations thereof |
Also Published As
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CN117545631A (zh) | 2024-02-09 |
US20240140064A1 (en) | 2024-05-02 |
JPWO2023276959A1 (ja) | 2023-01-05 |
EP4364943A1 (en) | 2024-05-08 |
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