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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 12760167 B1

PDFFull Text
Date of Patent:
Oct. 13, 2026

Filed:

May. 27, 2022

Biaxially oriented polyester film and production method therefor

Applicant:

Toyobo Co., Ltd., Osaka, JP;

Inventors:

Nobuyuki Manabe, Inuyama, JP;

Takamichi Goto, Inuyama, JP;

Masayuki Haruta, Inuyama, JP;

Assignee:

TOYOBO CO., LTD., Osaka, JP;

Attorney:

Leydig, Voit & Mayer, Ltd.

Primary Examiner:

Christina H W. Rosebach

Int. Cl.
CPC ...
C08J 11/12 (2006.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B29C 48/305 (2019.01); B29C 48/88 (2019.01); B29C 55/12 (2006.01); B29C 55/14 (2006.01); B29C 71/02 (2006.01); B29D 7/01 (2006.01); C08J 5/18 (2006.01); C08L 67/02 (2006.01); B29C 48/49 (2019.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01);
U.S. Cl.
CPC ...
C08J 11/12 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/305 (2019.02); B29C 48/914 (2019.02); B29C 55/12 (2013.01); B29C 55/14 (2013.01); B29C 71/02 (2013.01); B29D 7/01 (2013.01); C08J 5/18 (2013.01); C08L 67/02 (2013.01); B29C 48/49 (2019.02); B29C 2071/022 (2013.01); B29C 2071/025 (2013.01); B29K 2067/00 (2013.01); B29L 2007/00 (2013.01); C08J 2333/04 (2013.01); C08J 2367/02 (2013.01); C08J 2467/02 (2013.01); Y02W 30/62 (2015.05);
Abstract

The invention provides a biaxially oriented polyester film that is formed of a polyester resin composition containing polyester resin employing recycled PET bottles and particles, and meets all of requirements (1) to (4): (1) crystallization temperature is 120-139° C., (2) amount of change in orientation angle with respect to the film transverse direction is 0-10° per 0.5 m, (3) heat shrinkage rate at 150° C. for 30 minutes is 0.5-2.0% in the machine direction and −1.0-1.0% in the transverse direction, and (4) content rate of an isophthalic acid component with respect to 100 mol % of total dicarboxylic acid components in the polyester resin composition is 0.01-3.0 mol %. Maximum and minimum values of data for each measurement position are within the range in the requirement (3), and a maximum value of each amount of change between two adjacent sample collection positions is within the range in the requirement (2).

Find Patent Forward Citations

Manabe, Nobuyuki. (2026). Biaxially oriented polyester film and production method therefor (U.S. Patent No. 12760167). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12760167

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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