Invention Grant
- Patent Title: Multi-layer card and film assembly
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Application No.: US16609411Application Date: 2018-05-08
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Publication No.: US11052641B2Publication Date: 2021-07-06
- Inventor: William J. Brennan , Felicity Child
- Applicant: DuPont Teijin Films U.S. Limited Partnership
- Applicant Address: US DE Wilmington
- Assignee: DuPont Teijin Films U.S. Limited Partnership
- Current Assignee: DuPont Teijin Films U.S. Limited Partnership
- Current Assignee Address: US DE Wilmington
- Agency: Wolf, Greenfield & Sacks, P.C.
- Priority: GB1707355 20170508
- International Application: PCT/GB2018/051223 WO 20180508
- International Announcement: WO2018/206928 WO 20181115
- Main IPC: B32B27/08
- IPC: B32B27/08 ; B32B27/20 ; B32B27/30 ; B32B27/36

Abstract:
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).
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