US 11,052,641 B2
Multi-layer card and film assembly
William J. Brennan, Middlesbrough (GB); and Felicity Child, Middlesbrough (GB)
Assigned to DuPont Teijin Films U.S. Limited Partnership, Wilmington, DE (US)
Appl. No. 16/609,411
Filed by DuPont Teijin Films U.S. Limited Partnership, Wilmington, DE (US)
PCT Filed May 8, 2018, PCT No. PCT/GB2018/051223
§ 371(c)(1), (2) Date Oct. 29, 2019,
PCT Pub. No. WO2018/206928, PCT Pub. Date Nov. 15, 2018.
Claims priority of application No. 1707355 (GB), filed on May 8, 2017.
Prior Publication US 2020/0189244 A1, Jun. 18, 2020
Int. Cl. B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/30 (2006.01); B32B 27/36 (2006.01)
CPC B32B 27/08 (2013.01) [B32B 27/20 (2013.01); B32B 27/304 (2013.01); B32B 27/36 (2013.01); B32B 2250/05 (2013.01); B32B 2250/24 (2013.01); B32B 2264/102 (2013.01); B32B 2270/00 (2013.01); B32B 2307/31 (2013.01); B32B 2307/402 (2013.01); B32B 2307/41 (2013.01); B32B 2307/412 (2013.01); B32B 2307/518 (2013.01); B32B 2307/702 (2013.01); B32B 2307/704 (2013.01); B32B 2307/75 (2013.01); B32B 2425/00 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A multi-layer card comprising a polymeric inlay layer having a first surface and a second surface, further comprising a first multi-layer film which is disposed on the first surface of the polymeric inlay layer, and further comprising a first polymeric overlay layer which is disposed on said first multi-layer film, such that the layer order is polymeric inlay layer, first multi-layer film and first polymeric overlay layer, wherein said first multi-layer film comprises:
(i) a polyester base layer (B) comprising a crystallisable polyester (PB), and further comprising titanium dioxide in an amount of from about 1 to about 30 wt % by total weight of the base layer;
(ii) a first heat-sealable copolyester layer (A1) disposed on a first surface of said polyester base layer; and
(iii) optionally a second heat-sealable copolyester layer (A2) disposed on a second surface of said polyester base layer,
wherein the copolyester (CPA) of each of the first and optional second heat-sealable copolyester layers is independently selected from amorphous copolyesters (ACPA) derived from an aliphatic diol and a cycloaliphatic diol and at least one aromatic dicarboxylic acid, and/or
the polyester base layer (B) further comprises a copolyester (CPB) in an amount of at least about 10% by weight based on the total weight of the base layer (B),
wherein the copolyester (CPB) does not contain polyether segments.