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:
Oct. 28, 2019
Toyobo Co., Ltd., Osaka, JP;
Satoru Nakagawa, Tsuruga, JP;
Hideto Ohashi, Tsuruga, JP;
Nobuyuki Hironaka, Tsuruga, JP;
Hironao Sasaki, Osaka, JP;
Kosuke Uotani, Tsuruga, JP;
Keiichiro Togawa, Otsu, JP;
TOYOBO CO., LTD., Osaka, JP;
Abstract
The invention provides a copolymerized polyester resin which contains terephthalic acid as a main component of a dicarboxylic acid component; and contains ethylene glycol as a main component of a diol component, wherein a content of neopentyl glycol is more than 15% by mole and not more than 40% by mole and a content of diethylene glycol is from 6 to 20% by mole when a total amount of the whole diol component is taken as 100% by mole, wherein a content of a cyclic dimer consisting of terephthalic acid, neopentyl glycol and diethylene glycol is 5000 ppm or less, and wherein a content of a cyclic trimer consisting of terephthalic acid and ethylene glycol is 5000 ppm or less.