# US 9,434,863 B2 · PET-C based security laminates and documents > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,434,863 B2 - Document ID: US9434863B2 - Status: Granted - Kind: B2 - Application number: 14/238,810 - Filed: 2012-09-03 - Published: 2014-07-10 - Granted: 2016-09-06 - Earliest claimed: 2011-09-12 - Assignees: Agfa-Gevaert - Applicants: Vera Drieghe; Peter Cantraine; Bart Waumans; Walther Wouters; Ingrid Geuens - Inventors: Vera Drieghe; Peter Cantraine; Bart Waumans; Walther Wouters; Ingrid Geuens - Web page: https://patentgrep.com/patent/US9434863B2 ## CPC - C09J 7/29: Laminated material (metallised plastics C09J7/22) - B42D 25/00: Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof (printing processes to produce identification or security features B41M3/14) - B42D 25/47: using adhesives - C08J 7/042: {with two or more layers, where at least one layer of a composition contains a polymer binder} - C08J 7/043: Improving the adhesiveness of the coatings per se, e.g. forming primers (adhesives in the form of films or foils characterised by the primer layers between the polymer carriers and the adhesives C09J7/50) - C08J 7/046: Forming abrasion-resistant coatings; Forming surface-hardening coatings - B29C 55/10: multiaxial - B42D 2033/04 - B42D 2033/20 - B42D 2033/30 - B42D 2033/46 - C08J 2367/02: Polyesters derived from dicarboxylic acids and dihydroxy compounds; (C08J2367/06 takes precedence) - Y10T 428/264: Up to 3 mils - Y10T 428/265: 1 mil or less - Y10T 428/2848: Three or more layers - C09J: ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES (preparation of glue or gelatine C09H) - B42D: BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS - 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) - 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00) - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A security laminate (1) including in order a transparent oriented polyester support (2), a subbing layer (3) and an adhesive layer (4) which is coated on top of the subbing layer, wherein the binder of the adhesive layer is based on a mixture of a first and a second polymer in a weight ratio from 50/50 to 90/10, wherein the first polymer is a copolymer comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the first polymer; wherein the second polymer is a copolymer of styrene, butadiene and methylmethacrylate or a copolymer of vinyl butyral, vinyl acetate and vinyl alcohol; and wherein the binder of the subbing layer is based on a polyester-urethane copolymer. ## Claims ### Claim 1 A security laminate including in order an oriented polyester support, a subbing layer, and an adhesive layer which is coated on top of the subbing layer, wherein the binder of the adhesive layer is based on a mixture of a first and a second polymer in a weight ratio from 50/50 to 90/10, wherein the first polymer is a copolymer comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the first polymer; wherein the second polymer is a copolymer of styrene, butadiene and methylmethacrylate or a copolymer of vinyl butyral, vinyl acetate and vinyl alcohol. ### Claim 2 (depends on 1) The security laminate according to claim 1, wherein the binder of the subbing layer is based on a polyester-urethane copolymer. ### Claim 3 (depends on 1) The security laminate according to claim 1, wherein the oriented polyester support is a biaxially stretched polyethylene terephthalate support. ### Claim 4 (depends on 2) The security laminate according to claim 2, wherein the oriented polyester support is a biaxially stretched polyethylene terephthalate support. ### Claim 5 (depends on 1) The security laminate according to claim 1, wherein the first polymer is a hydroxyl-functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer. ### Claim 6 (depends on 2) The security laminate according to claim 2, wherein the first polymer is a hydroxyl-functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer. ### Claim 7 (depends on 4) The security laminate according to claim 4, wherein the first polymer is a hydroxyl-functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer. ### Claim 8 (depends on 1) The security laminate according to claim 1, wherein the thickness of the adhesive layer is between 1 μm and 12 μm. ### Claim 9 (depends on 4) The security laminate according to claim 4, wherein the thickness of the adhesive layer is between 1 μm and 12 μm. ### Claim 10 (depends on 7) The security laminate according to claim 7, wherein the thickness of the adhesive layer is between 1 μm and 12 μm. ### Claim 11 (depends on 1) The security laminate according to claim 1, having a thickness between 23 μm and 80 μm. ### Claim 12 (depends on 1) A security document containing the security laminate as defined in claim 1. ### Claim 13 (depends on 12) The security document according to claim 12, wherein the security laminate is laminated onto an ink layer covering more than 80% of the surface of a security document precursor. ### Claim 14 (depends on 12) The security document according to claim 12 containing the security laminate on both sides of its security document core. ### Claim 15 (depends on 14) The security document according to claim 14, wherein the security document core includes one or more lamellae selected from the group consisting of an amorphous polyester lamella, a crystalline polyester lamella, a polycarbonate lamella, a polyolefin lamella and a polyvinyl chloride lamella. ### Claim 16 (depends on 12) The security document according to claim 12, wherein the security document includes an electronic chip and optionally an antenna. ### Claim 17 A method of preparing a security laminate including the steps of: a) stretching a polyester substrate in either a longitudinal or a transversal direction; b) coating and drying a subbing layer on the stretched polyester substrate; c) stretching the coated polyester substrate in the longitudinal or transversal direction not selected in step a) in order to obtain a coated biaxially stretched polyester substrate having a subbing layer; and d) coating and drying an adhesive layer on top of the dry subbing layer, wherein the adhesive layer contains a mixture of a first and a second polymer in a weight ratio from 50/50 to 90/10, wherein the first polymer is a copolymer comprising vinyl acetate and at least 85 wt % of vinyl chloride based on the total weight of the first polymer; wherein the second polymer is a copolymer of styrene, butadiene and methylmethacrylate or a copolymer of vinyl butyral, vinyl acetate and vinyl alcohol. ### Claim 18 (depends on 17) The method according to claim 17, wherein the subbing layer contains a binder selected from the group consisting of a hydroxyl-functional, partially-hydrolyzed vinyl chloride/vinyl acetate copolymer and a polyester-urethane copolymer. ### Claim 19 (depends on 17) The method according to claim 17, wherein the polyester substrate is a polyethylene terephthalate substrate. ### Claim 20 (depends on 18) The method according to claim 18, wherein the polyester substrate is a polyethylene terephthalate substrate. ### Claim 21 (depends on 1) A method of impeding the falsification of a security document comprising attaching a security laminate as defined in claim 1 to a security document.