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.:
Date of Patent:
Jul. 01, 2025
Filed:
Mar. 02, 2021
Applicant:
Toyobo Co., Ltd., Osaka, JP;
Inventors:
Assignee:
TOYOBO CO., LTD., Osaka, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09J 7/29 (2018.01); C09J 7/25 (2018.01); C09J 7/38 (2018.01); G02B 1/14 (2015.01); H04M 1/02 (2006.01);
U.S. Cl.
CPC ...
C09J 7/255 (2018.01); C09J 7/29 (2018.01); C09J 7/38 (2018.01); G02B 1/14 (2015.01); H04M 1/0268 (2013.01); C09J 2203/326 (2013.01); C09J 2467/006 (2013.01); C09J 2475/00 (2013.01); H04M 1/0216 (2013.01);
Abstract
Problem: An object of the present invention is to provide a polyester film for a foldable display, the film having a hold angle in a bending direction of 155° or more and a maximum heat shrinkage at 150° C. of 1.5% or less (wherein the hold angle refers to an angle of a crease after fixing the film at room temperature for 72 hours in such a manner that a strain of 1.7% is applied to both surfaces of a bent portion of the film, and the bending direction refers to a direction that is orthogonal to a folding portion of a foldable display produced using the film.