logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 12179978 B1

PDFFull Text
Date of Patent:
Dec. 31, 2024

Filed:

Sep. 19, 2019

Laminating film resistant to discoloration caused by cooking, and film-laminated metal sheet

Applicant:

Baoshan Iron & Steel Co., Ltd., Shanghai, CN;

Inventors:

Long Xie, Shanghai, CN;

Zhangwei Wang, Shanghai, CN;

Hua Ni, Shanghai, CN;

Xiujun Li, Shanghai, CN;

Hongxing Chen, Shanghai, CN;

Assignee:

BAOSHAN IRON & STEEL CO., LTD., Shanghai, CN;

Attorneys:

Lei Fang, Esq.

Smith Tempel Blaha LLC

Primary Examiner:

Travis M Figg

Int. Cl.
CPC ...
B65D 65/40 (2006.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); B29K 67/00 (2006.01); B29K 509/08 (2006.01); B32B 15/09 (2006.01); B32B 15/18 (2006.01); B32B 15/20 (2006.01); B32B 27/08 (2006.01); B32B 27/20 (2006.01); B32B 27/36 (2006.01); B65D 6/00 (2006.01); C08J 5/18 (2006.01); C08L 67/02 (2006.01);
U.S. Cl.
CPC ...
B65D 65/40 (2013.01); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B32B 15/09 (2013.01); B32B 15/18 (2013.01); B32B 15/20 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/36 (2013.01); B65D 7/42 (2013.01); C08J 5/18 (2013.01); C08L 67/02 (2013.01); B29K 2067/003 (2013.01); B29K 2509/08 (2013.01); B32B 2250/04 (2013.01); B32B 2264/101 (2013.01); B32B 2270/00 (2013.01); B32B 2307/732 (2013.01); B32B 2439/66 (2013.01); B32B 2439/70 (2013.01); C08J 2367/02 (2013.01); C08J 2467/02 (2013.01); C08L 2203/16 (2013.01); C08L 2205/025 (2013.01);
Abstract

A blended polyester laminating film resistant to discoloration caused by cooking, comprising polyethylene terephthalate and polybutylene terephthalate. The blended polyester laminating film comprises three layers, i.e., upper, middle, and lower layers. One surface layer contains SiOin a mass fraction of 1200-2000 ppm added by in-situ polymerization. The blended polyester laminating film is manufactured by a three-layer coextrusion biaxial stretching method, and the manufacturing method is 240-275° C. A film-laminated metal sheet manufactured from the blended polyester laminating film has excellent resistance to discoloration caused by cooking, and is applied to metal containers for food and beverage packaging that require high-temperature sterilization.

Find Patent Forward Citations

Loading…