# US 9,040,132 B2 · Medical multilayer film and use thereof > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,040,132 B2 - Document ID: US9040132B2 - Status: Granted - Kind: B2 - Application number: 13/263,008 - Filed: 2010-03-24 - Published: 2012-02-09 - Granted: 2015-05-26 - Earliest claimed: 2009-04-06 - Assignees: Jw Life Science Corporation - Applicants: Yeon-Seok Choi; Hye-Kyung Kim; Eun-O Kim - Inventors: Yeon-Seok Choi; Hye-Kyung Kim; Eun-O Kim - Web page: https://patentgrep.com/patent/US9040132B2 ## CPC - B32B 27/32: comprising polyolefins {(comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30)} - B32B 27/302: {comprising aromatic vinyl (co)polymers, e.g. styrenic (co)polymers} - B32B 25/08: of synthetic resin - B32B 27/08: of synthetic resin - B32B 2307/40: having particular optical properties - B32B 2307/412: Transparent - B32B 2439/00: Containers; Receptacles - B32B 2439/80: Medical packaging - B32B 2535/00: Medical equipment, e.g. bandage, prostheses or catheter - Y10T 428/13: Hollow or container type article [e.g., tube, vase, etc.] - Y10T 428/1303: Paper containing [e.g., paperboard, cardboard, fiberboard, etc.] - Y10T 428/1334: Nonself-supporting tubular film or bag [e.g., pouch, envelope, packet, etc.] - Y10T 428/1352: Polymer or resin containing [i.e., natural or synthetic] - Y10T 428/1359: Three or more layers [continuous layer] - Y10T 428/139: Open-ended, self-supporting conduit, cylinder, or tube-type article - Y10T 428/2495: Thickness [relative or absolute] - Y10T 428/31909: Next to second addition polymer from unsaturated monomers - Y10T 428/31913: Monoolefin polymer - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract Disclosed are a medical multilayer film and use thereof. More specifically, disclosed are a medical multilayer film including: an outer layer comprising a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, an intermediate layer comprising 10 to 60% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof and 40 to 90% by weight of a thermoplastic elastomer, and an inner layer comprising 60 to 80% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer and a combination thereof, 10 to 30% by weight of polyethylene, and 1 to 10% by weight of a thermoplastic elastomer, and use thereof. The multilayer film exhibits superior transparency, heat resistance and sealability as well as cold resistance, heat resistance, drop impact resistance and low-temperature impact resistance, thus being applicable to infusion solution containers, medical pouches, contrast medium containers and blood containers for packaging and administering medical solutions such as infusion solutions and blood. ## Claims ### Claim 1 A medical multilayer film for packaging and administering medical solutions comprising: an outer layer comprising a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer, and a combination thereof; an intermediate layer comprising 10 to 60% by weight of a propylene polymer selected from the group consisting of a polypropylene, a propylene copolymer in which propylene is a main component of the copolymer, and a combination thereof, and 50 to 90% by weight of a styrene-based thermoplastic elastomer; and an inner layer consisting essentially of a blend of 60 to 80% by weight of a copolymer of propylene, ethylene and 1-butene, 10 to 30% by weight of a copolymer of ethylene and alpha-olefin, and 1 to 10% by weight of a styrene-based thermoplastic elastomer. ### Claim 2 (depends on 1) The medical multilayer film according to claim 1, wherein the alpha-olefin is selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, and combinations thereof. ### Claim 3 (depends on 1) The medical multilayer film according to claim 1, wherein the thermoplastic elastomer is selected from the group consisting of hydrogenated SIBS (styrene-isoprene-butadiene block copolymers), hydrogenated SBS (styrene-butadiene-styrene copolymers), hydrogenated SIS (styrene-isoprene-styrene copolymers), hydrogenated SEBS (styrene-ethylene-butadiene block copolymers), hydrogenated SEPS (styrene-ethylene-propylene block copolymers), hydrogenated SEEPS (styrene-ethylene-ethylene-propylene block copolymers), hydrogenated SBC (styrene-butadiene block copolymers), hydrogenated SBPS (styrene-ethylene-propylene-styrene copolymers), and combinations thereof. ### Claim 4 (depends on 1) The medical multilayer film according to claim 1, wherein, based on the total thickness of the multilayer film, the thickness of the outer layer is 3 to 20%, the thickness of the intermediate layer is 60 to 94%, and the thickness of the inner layer is 3 to 20%. ### Claim 5 (depends on 1) The medical multilayer film according to claim 1, wherein, in the multilayer film, the outer layer has a melting point of 145 to 165° C., the intermediate layer has a melting point of 140 to 155° C., and the inner layer has a melting point of 125 to 140° C. ### Claim 6 (depends on 1) An infusion solution container comprising the medical multilayer film of claim 1. ### Claim 7 (depends on 1) A medical pouch comprising the medical multilayer film of claim 1. ### Claim 8 (depends on 1) A contrast medium container comprising the medical multilayer film of claim 1. ### Claim 9 (depends on 1) A blood container comprising the medical multilayer film of claim 1. ### Claim 10 (depends on 1) The medical multilayer film according to claim 1, wherein the alpha-olefin is selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 4-methyl-1-pentene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-undecene, 1-dodecene, and combinations thereof. ### Claim 11 (depends on 1) The medical multilayer film according to claim 1, wherein the propylene polymer of the intermediate layer is a polypropylene homopolymer.