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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 11732097 B1

PDFFull Text
Date of Patent:
Aug. 22, 2023

Filed:

Sep. 28, 2020

Low shrinkage low oligomer polyester film and method for manufacturing the same

Applicant:

Nan Ya Plastics Corporation, Taipei, TW;

Inventors:

Te-Chao Liao, Taipei, TW;

Wen-Cheng Yang, Taipei, TW;

Wen-Jui Cheng, Taipei, TW;

Chia-Yen Hsiao, Taipei, TW;

Assignee:

NAN YA PLASTICS CORPORATION, Taipei, TW;

Attorney:

Li & Cai Intellectual Property (USA) Office

Primary Examiner:

Nathan L Van Sell

Int. Cl.
CPC ...
C08J 5/18 (2006.01); C08K 13/08 (2006.01); B29C 55/00 (2006.01); B29C 55/16 (2006.01); B29C 48/00 (2019.01); B32B 27/08 (2006.01); B32B 27/36 (2006.01); B29C 48/08 (2019.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01);
U.S. Cl.
CPC ...
C08J 5/18 (2013.01); B29C 48/0018 (2019.02); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 55/005 (2013.01); B29C 55/16 (2013.01); B32B 27/08 (2013.01); B32B 27/36 (2013.01); C08K 13/08 (2013.01); B29K 2067/00 (2013.01); B29L 2007/008 (2013.01); B32B 2307/518 (2013.01); C08J 2367/00 (2013.01);
Abstract

A low shrinkage low oligomer polyester film and a method for manufacturing the same are provided. The method includes forming at least one polyester composition into an unstretched polyester thick film and stretching the unstretched polyester thick film in a machine direction (MD) and a transverse direction (TD) at a stretch ratio of two to six times. The polyester composition includes 94% to 99.974% by weight of a polyester resin, 0.01% to 1% by weight of a primary antioxidant, 0.01% to 1% by weight of a secondary antioxidant, 0.003% to 2% by weight of a nucleating agent, and 0.003% to 2% by weight of a flow aid. The polyester resin has an intrinsic viscosity between 0.60 dl/g and 0.80 dl/g.

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