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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 11623434 B1

PDFFull Text
Date of Patent:
Apr. 11, 2023

Filed:

Sep. 04, 2020

Biaxially stretched polyester film and method for producing the same

Applicant:

Nan Ya Plastics Corporation, Taipei, TW;

Inventors:

Te-Chao Liao, Taipei, TW;

Wen-Cheng Yang, Taipei, TW;

Hao-Sheng Chen, Taipei, TW;

Chia-Yen Hsiao, Taipei, TW;

Assignee:

NAN YA PLASTICS CORPORATION, Taipei, TW;

Attorney:

Li & Cai Intellectual Property (USA) Office

Primary Examiner:

Monique R Jackson

Int. Cl.
CPC ...
B32B 27/20 (2006.01); C08K 3/013 (2018.01); B32B 27/08 (2006.01); B32B 27/36 (2006.01); B29C 48/08 (2019.01); B29C 48/21 (2019.01); C08J 5/18 (2006.01); B29K 67/00 (2006.01); B29C 55/14 (2006.01); B29C 48/00 (2019.01); B29K 509/02 (2006.01);
U.S. Cl.
CPC ...
B32B 27/20 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/21 (2019.02); B29C 55/146 (2013.01); B32B 27/08 (2013.01); B32B 27/36 (2013.01); C08J 5/18 (2013.01); C08K 3/013 (2018.01); B29K 2067/00 (2013.01); B29K 2509/02 (2013.01); B29K 2995/0024 (2013.01); B32B 2250/02 (2013.01); B32B 2250/244 (2013.01); B32B 2264/102 (2013.01); B32B 2264/12 (2013.01); B32B 2307/408 (2013.01); B32B 2307/412 (2013.01); B32B 2307/518 (2013.01); B32B 2307/538 (2013.01); C08J 2367/00 (2013.01); C08K 2201/005 (2013.01);
Abstract

A biaxially stretched polyester film and a method for producing the same are provided. The biaxially stretched polyester film includes a polyester resin base layer and a matte layer. The polyester resin base layer includes: (1) 50 to 95 wt % of a polyester resin base material, and an intrinsic viscosity of the polyester resin base material being between 0.5 and 0.8 dL/g; and (2) 0.01 to 5 wt % of a high viscosity polyester resin material, and an intrinsic viscosity of the high viscosity polyester resin material being between 0.9 and 1.1 dL/g. The matte layer includes: (1) 50 to 95 wt % of a polyester resin matrix material, and an intrinsic viscosity of the polyester resin matrix material being between 0.5 and 0.8 dL/g; and (2) 0.3 to 40 wt % of a plurality of filler particles, and the filler particles having an average particle size of between 0.15 μm and 10 μm.

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