# US 12,767,403 B2 · Barrier laminate, lid material, and packaging container > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,767,403 B2 - Document ID: US12767403B2 - Status: Granted - Kind: B2 - Application number: 18/681,358 - Filed: 2022-08-05 - Published: 2024-10-17 - Granted: 2026-10-20 - Earliest claimed: 2021-08-05 - Assignees: Dai Nippon Printing Co., Ltd. - Applicants: Dai Nippon Printing Co., Ltd. - Inventors: Shunsuke Furuya; Shinichiro Kono; Aya Suzuki; Toru Suda; Yohei Yamato - Web page: https://patentgrep.com/patent/US12767403B2 ## CPC - B65D 65/40: Applications of laminates for particular packaging purposes {(B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or)} - B32B 7/027: Thermal properties - B32B 7/12: using interposed adhesives or interposed materials with bonding properties - B32B 27/08: of synthetic resin - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B65D 75/008: {Standing pouches, i.e. "Standbeutel"} - B32B 2250/02: 2 layers - B32B 2250/03: 3 layers - B32B 2250/242: All polymers belonging to those covered by group B32B27/32 - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2255/20: Inorganic coating - B32B 2255/26: Polymeric coating - B32B 2255/28: Multiple coating on one surface - B32B 2307/308: Heat stability - B32B 2307/7244: Oxygen barrier - B32B 2307/7246: Water vapor barrier - B32B 2439/70: Food packaging - 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 - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract In one aspect, the present disclosure relates to a barrier laminate including a substrate and a sealant layer in this order in a thickness direction, wherein the substrate is a barrier substrate including a polypropylene resin layer and an evaporated film, the polypropylene resin layer is a layer subjected to a stretching process, the evaporated film is composed of an inorganic oxide, the barrier laminate after heat treatment at 120° C. for 15 minutes has a thermal shrinkage ratio (MD1) of 2.00% or less in an MD direction and a thermal shrinkage ratio (TD1) of 2.00% or less in a TD direction. ## Claims ### Claim 1 A barrier laminate comprising: a first substrate; a second substrate; and a sealant layer in this order in a thickness direction, wherein one of the first substrate and the second substrate is a barrier substrate including a polypropylene resin layer and an evaporated film, and the other of the first substrate and the second substrate is a polypropylene resin substrate, the barrier substrate includes a surface resin layer between the polypropylene resin layer and the evaporated film, the barrier substrate includes an adhesive resin layer between the polypropylene resin layer and the surface resin layer, the polypropylene resin layer is a layer subjected to a stretching process, the evaporated film is composed of an inorganic oxide, the polypropylene resin substrate is a substrate subjected to a stretching process, and the barrier laminate after heat treatment at 120° C. for 15 minutes has a thermal shrinkage ratio (MD1) of 2.00% or less in an MD direction and a thermal shrinkage ratio (TD1) of 2.00% or less in a TD direction. ### Claim 2 (depends on 1) The barrier laminate according to claim 1, wherein a ratio (MD1/TD1) of the thermal shrinkage ratio (MD1) to the thermal shrinkage ratio (TD1) of the barrier laminate after heat treatment at 120° C. for 15 minutes is 0.30 or more and 3.00 or less. ### Claim 3 (depends on 1) The barrier laminate according to claim 1, wherein the barrier laminate after heat treatment at 150° C. for 5 minutes has a thermal shrinkage ratio (MD2) of 4.00% or less in the MD direction and a thermal shrinkage ratio (TD2) of 4.00% or less in the TD direction. ### Claim 4 (depends on 3) The barrier laminate according to claim 3, wherein a ratio (MD2/TD2) of the thermal shrinkage ratio (MD2) to the thermal shrinkage ratio (TD2) of the barrier laminate after heat treatment at 150° C. for 5 minutes is 0.30 or more and 3.00 or less. ### Claim 5 (depends on 1) The barrier laminate according to claim 1, wherein the sealant layer is a resin layer composed of polypropylene. ### Claim 6 (depends on 1) The barrier laminate according to claim 1, wherein when the first substrate is a barrier substrate, the first substrate is disposed such that the evaporated film faces the sealant layer and the polypropylene resin layer faces the side opposite the sealant layer, and when the second substrate is a barrier substrate, the second substrate is disposed such that the evaporated film faces the first substrate and the polypropylene resin layer faces the sealant layer. ### Claim 7 (depends on 1) The barrier laminate according to claim 1, wherein the first substrate is a polypropylene resin substrate, and the second substrate is a barrier substrate. ### Claim 8 (depends on 1) The barrier laminate according to claim 1, wherein the barrier substrate further includes a surface coating layer between the polypropylene resin layer and the evaporated film, and the surface coating layer contains a resin material with a polar group. ### Claim 9 (depends on 1) The barrier laminate according to claim 1, wherein the barrier substrate further includes a surface resin layer between the polypropylene resin layer and the evaporated film, and the surface resin layer contains a resin material with a melting point of 180° C. or more. ### Claim 10 (depends on 9) The barrier laminate according to claim 9, wherein the polypropylene resin layer and the surface resin layer in the barrier substrate are a coextruded stretched resin film. ### Claim 11 (depends on 1) The barrier laminate according to claim 1, further including a barrier coating layer on the evaporated film. ### Claim 12 (depends on 1) The barrier laminate according to claim 1, including a first adhesive layer between the first substrate and the second substrate, and a second adhesive layer between the second substrate and the sealant layer. ### Claim 13 A packaging container comprising a barrier laminate, wherein the barrier laminate comprises: a first substrate; a second substrate; and a sealant layer in this order in a thickness direction, one of the first substrate and the second substrate is a barrier substrate including a polypropylene resin layer and an evaporated film, and the other of the first substrate and the second substrate is a polypropylene resin substrate, the barrier substrate includes a surface resin layer between the polypropylene resin layer and the evaporated film, the barrier substrate includes an adhesive resin layer between the polypropylene resin layer and the surface resin layer, the polypropylene resin layer is a layer subjected to a stretching process, the evaporated film is composed of an inorganic oxide, the polypropylene resin substrate is a substrate subjected to a stretching process, and the barrier laminate after heat treatment at 120° C. for 15 minutes has a thermal shrinkage ratio (MD1) of 2.00% or less in an MD direction and a thermal shrinkage ratio (TD1) of 2.00% or less in a TD direction. ### Claim 14 (depends on 13) The packaging container according to claim 13, which is a boiled or retort pouch. ### Claim 15 A lid material comprising a barrier laminate, wherein the barrier laminate comprises: a first substrate; a second substrate; and a sealant layer in this order in a thickness direction, one of the first substrate and the second substrate is a barrier substrate including a polypropylene resin layer and an evaporated film, and the other of the first substrate and the second substrate is a polypropylene resin substrate, the barrier substrate includes a surface resin layer between the polypropylene resin layer and the evaporated film, the barrier substrate includes an adhesive resin layer between the polypropylene resin layer and the surface resin layer, the polypropylene resin layer is a layer subjected to a stretching process, the evaporated film is composed of an inorganic oxide, the polypropylene resin substrate is a substrate subjected to a stretching process, and the barrier laminate after heat treatment at 120° C. for 15 minutes has a thermal shrinkage ratio (MD1) of 2.00% or less in an MD direction and a thermal shrinkage ratio (TD1) of 2.00% or less in a TD direction. ### Claim 16 A packaging container comprising: a container main body with a storage portion; and the lid material bonded to the container main body to seal the storage portion, wherein the lid material comprises a barrier laminate, the barrier laminate comprises: a first substrate; a second substrate; and a sealant layer in this order in a thickness direction, one of the first substrate and the second substrate is a barrier substrate including a polypropylene resin layer and an evaporated film, and the other of the first substrate and the second substrate is a polypropylene resin substrate, the barrier substrate includes a surface resin layer between the polypropylene resin layer and the evaporated film, the barrier substrate includes an adhesive resin layer between the polypropylene resin layer and the surface resin layer, the polypropylene resin layer is a layer subjected to a stretching process, the evaporated film is composed of an inorganic oxide, the polypropylene resin substrate is a substrate subjected to a stretching process, and the barrier laminate after heat treatment at 120° C. for 15 minutes has a thermal shrinkage ratio (MD1) of 2.00% or less in an MD direction and a thermal shrinkage ratio (TD1) of 2.00% or less in a TD direction.