# US 11,028,243 B2 · Oriented polyester film > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,028,243 B2 - Document ID: US11028243B2 - Status: Granted - Kind: B2 - Application number: 16/799,546 - Filed: 2020-02-24 - Published: 2020-08-27 - Granted: 2021-06-08 - Earliest claimed: 2019-02-25 - Assignees: Toyobo Co., Ltd. - Applicants: Toyobo Film Solutions Limited - Inventors: Naoki Iyo; Shinji Yano - Web page: https://patentgrep.com/patent/US11028243B2 ## CPC - C08J 5/18: Manufacture of films or sheets - B32B 27/08: of synthetic resin - B32B 27/18: characterised by the use of special additives - B32B 27/20: using fillers, pigments, thixotroping agents - B32B 27/36: comprising polyesters - B32B 2250/02: 2 layers - B32B 2250/03: 3 layers - B32B 2250/244: All polymers belonging to those covered by group B32B27/36 - B32B 2250/40: Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA - B32B 2255/10: on synthetic resin layer or on natural or synthetic rubber layer - B32B 2264/0235: Aromatic vinyl resin, e.g. styrenic (co)polymers - B32B 2264/025: Acrylic resin particles, e.g. polymethyl methacrylate or ethylene-acrylate copolymers - B32B 2264/0257: Polyolefin particles, e.g. polyethylene or polypropylene homopolymers or ethylene-propylene copolymers - B32B 2264/0278: Polyester particles - B32B 2264/102: Oxide or hydroxide - B32B 2264/108: Carbon, e.g. graphite particles - B32B 2307/4026: within the layer by addition of a colorant, e.g. pigments, dyes - B32B 2307/514: Oriented - B32B 2307/732: Dimensional properties - B32B 2307/748: Releasability - B32B 2451/00: Decorative or ornamental articles - B32B 2605/08: Cars - C08J 2367/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) - C08J 2423/30: by oxidation - C08J 2491/06: Waxes - C08J: WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H (working, e.g. shaping, of plastics B29) - B32B: LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM ## Abstract An oriented polyester film containing antioxidant and modified polyolefin wax in a surface layer on at least one side thereof, wherein the oriented polyester film is such that the modified polyolefin wax contained in said layer is present in an amount that, as measured based on weight of a composition at said layer, is not less than 0.1 wt % but less than 3.0 wt %, and wherein the modified polyolefin wax is such that acid value thereof is not less than 1 mg KOH/g but less than 50 mg KOH/g, 3 wt % weight loss onset temperature thereof is not less than 300° C., weight-average molecular weight thereof is within a range that is 3,500 to 65,000, and the antioxidant is present in an amount that, as measured based on the weight of the composition, is not less than 0.02 wt % but less than 0.35 wt %. ## Claims ### Claim 1 An oriented polyester film containing antioxidant and modified polyolefin wax in a surface layer on at least one side thereof, wherein the oriented polyester film is such that the modified polyolefin wax contained in said layer is present in an amount that, as measured based on weight of a composition at said layer, is not less than 0.1 wt % but less than 3.0 wt %, and wherein the modified polyolefin wax is such that acid value thereof is not less than 1 mg KOH/g but less than 50 mg KOH/g, 3 wt % weight loss onset temperature thereof is not less than 300° C., weight-average molecular weight thereof is within a range that is 3,500 to 65,000, and the antioxidant is present in an amount that, as measured based on the weight of the composition, is not less than 0.02 wt % but less than 0.35 wt %. ### Claim 2 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax contains at least one species selected from among the group consisting of acid-modified polypropylene wax, acid-modified polyethylene wax, polypropylene oxidate wax, and polyethylene oxidate wax. ### Claim 3 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax is laminarly dispersed within said layer. ### Claim 4 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax possesses at least one species selected from among the group consisting of carboxyl group, ketone group, and hydroxyl group. ### Claim 5 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax contains acid-modified polypropylene wax. ### Claim 6 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax contains acid-modified polyethylene wax. ### Claim 7 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax contains polypropylene oxidate wax. ### Claim 8 (depends on 1) The oriented polyester film according to claim 1 wherein the modified polyolefin wax contains polyethylene oxidate wax. ### Claim 9 (depends on 1) The oriented polyester film according to claim 1 wherein thickness of the oriented polyester film is within a range that is 10 pin to 200 μm. ### Claim 10 (depends on 1) The oriented polyester film according to claim 1 wherein thickness of the oriented polyester film is within a range that is 15 μm to 100 μm. ### Claim 11 (depends on 1) The oriented polyester film according to claim 1 wherein polyester is present therein in an amount that is not less than 80 wt % per 100 wt % of the oriented polyester film. ### Claim 12 (depends on 11) The oriented polyester film according to claim 11 wherein the polyester is polyethylene terephthalate. ### Claim 13 (depends on 1) The oriented polyester film according to claim 1 having a multilayer structure that includes said layer. ### Claim 14 (depends on 13) The oriented polyester film according to claim 13 wherein the multilayer structure further possesses a layer that contains colorant pigment. ### Claim 15 (depends on 13) The oriented polyester film according to claim 13 wherein the multilayer structure farther possesses a core layer that is laminated to said layer and the core layer contains colorant pigment. ### Claim 16 (depends on 1) The oriented polyester film according to claim 1 wherein said layer contains colorant pigment. ### Claim 17 (depends on 1) The oriented polyester film according to claim 1 having a single-layer structure that includes said layer. ### Claim 18 (depends on 17) The oriented polyester film according to claim 17 wherein said layer contains colorant pigment. ### Claim 19 (depends on 1) A decorative laminated body having the oriented polyester film according to claim 1, and having at least one functional layer selected from among the group consisting of printing layer, hard coat layer, adhesion layer, and mold release layer provided on at least one face thereof.