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. 25, 2017
Filed:
Aug. 17, 2011
Keiichiro Togawa, Otsu, JP;
Hideto Ohashi, Tsuruga, JP;
Toshifumi Unrinin, Otsu, JP;
Hiroshi Shibano, Osaka, JP;
Keiichiro Togawa, Otsu, JP;
Hideto Ohashi, Tsuruga, JP;
Toshifumi Unrinin, Otsu, JP;
Hiroshi Shibano, Osaka, JP;
Toyobo Co., Ltd., Osaka, JP;
Abstract
Provided is a hydrolysis-resistant polyester film having a low acid value due to suppression of acid value-increase during film formation. The hydrolysis-resistant polyester film of the present invention is a polyester film comprising a polyester resin composition, wherein the polyester resin composition that forms the films comprises 0.03 to 6.7 eq/ton of hindered phenol structural units, an acid value of a polyester that forms the film is less than 25 eq/ton, and an intrinsic viscosity of a polyester that forms the film is more than 0.64 dL/g and not less than 0.90 dL/g.