	US 12,252,610 B2
	Polyester film for coating iron and film-coated metal plate
Long Xie, Shanghai (CN); Hongxing Chen, Shanghai (CN); and Jingge Dai, Shanghai (CN)
Assigned to BAOSHAN IRON & STEEL CO., LTD., Shanghai (CN)
Appl. No. 17/277,170
Filed by BAOSHAN IRON & STEEL CO., LTD., Shanghai (CN)
PCT Filed Sep. 18, 2019, PCT No. PCT/CN2019/106467 § 371(c)(1), (2) Date Mar. 17, 2021, PCT Pub. No. WO2020/057553, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 201811090656.1 (CN), filed on Sep. 19, 2018.
Prior Publication US 2021/0371644 A1, Dec. 2, 2021
Int. Cl. C08L 67/02 (2006.01); B29C 55/02 (2006.01); B29C 55/12 (2006.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01); B29L 31/00 (2006.01); B32B 15/09 (2006.01); B32B 15/18 (2006.01); B32B 37/06 (2006.01)

CPC C08L 67/02 (2013.01) [B29C 55/023 (2013.01); B29C 55/12 (2013.01); B32B 15/09 (2013.01); B32B 15/18 (2013.01); B32B 37/06 (2013.01); B29K 2067/003 (2013.01); B29L 2007/008 (2013.01); B29L 2031/712 (2013.01); B32B 2307/518 (2013.01); B32B 2439/70 (2013.01); C08L 2203/16 (2013.01); C08L 2205/025 (2013.01)]

20 Claims

1. A blended polyester film, wherein the blended polyester film comprises a copolyester and a homopolyester, wherein the blended polyester film comprises three layers including an upper layer, an intermediate layer, and a lower layer, wherein each of the three layers is a mixture of the copolyester and the homopolyester that are mixed homogeneously, and wherein the copolyester comprises, based on parts by mass, 800-2000 ppm of SiO₂added by in-situ polymerization.