- Patent Title: Biaxially drawn colored polyester film for laminating metal sheet
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Application No.: US15736848Application Date: 2016-07-22
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Publication No.: US10661537B2Publication Date: 2020-05-26
- Inventor: Takatoshi Sato , Shinichiro Okada
- Applicant: TEIJIN FILM SOLUTIONS LIMITED
- Applicant Address: JP Tokyo
- Assignee: TEIJIN FILM SOLUTIONS LIMITED
- Current Assignee: TEIJIN FILM SOLUTIONS LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Sughrue Mion, PLLC
- Priority: com.zzzhc.datahub.patent.etl.us.BibliographicData$PriorityClaim@38cd3651
- International Application: PCT/JP2016/071573 WO 20160722
- International Announcement: WO2017/022526 WO 20170209
- Main IPC: B32B7/02
- IPC: B32B7/02 ; B32B27/08 ; B32B27/36 ; B32B27/20 ; B32B15/09

Abstract:
[Problem] To provide a biaxially drawn colored polyester film for laminating and forming metal sheet that: exhibits excellent formability such that even under severe processing or high-temperature heat treatments, the film is prevented from chipping or cracks during forming into a can etc.; and yields formed articles such as cans that have excellent concealability, appearance, and printability.[Solution] The invention is arrived at using a biaxially drawn colored polyester film for laminating and forming metal sheet. Said film comprising at least two layers of: a surface layer (layer A) mainly composed of a polyester having a melting point TmA of 230 to 260° C., layer A having a coloring pigment with an amount of 10 wt % or less, a polymer component with intrinsic viscosity of 0.46 or more, and a water contact angle of 70 to 120° on an outer surface; and a substrate layer (layer B) mainly composed of a polyester having a melting point TmB of 230 to 260° C. and a coloring pigment, layer B having a polymer component with intrinsic viscosity of 0.46 or more and the coloring pigment with an amount of more than 10 wt % and 50 wt % or less; wherein |TmB−TmA| is 4° C. or less.
Public/Granted literature
- US20180361715A1 BIAXIALLY DRAWN COLORED POLYESTER FILM FOR LAMINATING METAL SHEET Public/Granted day:2018-12-20
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