US Patent Issued to BAOSHAN IRON & STEEL on March 18 for "Polyester film for coating iron and film-coated metal plate" (Chinese Inventors)

ALEXANDRIA, Va., March 19 -- United States Patent no. 12,252,610, issued on March 18, was assigned to BAOSHAN IRON & STEEL Co. LTD. (Shanghai).

"Polyester film for coating iron and film-coated metal plate" was invented by Long Xie (Shanghai), Hongxing Chen (Shanghai) and Jingge Dai (Shanghai).

According to the abstract* released by the U.S. Patent & Trademark Office: "Disclosed is a blended polyester thin film, comprising a copolyester and a homopolyester. The thin film is composed of upper, middle, and lower layers. Each of the three layers is a homogeneous mixture of the copolyester and the homopolyester. The copolyester comprises 800-2000 ppm by mass of SiO2 added by means of in-situ polymerization. A dihydric alcohol component in the ...