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:
Jan. 23, 2018
Filed:
Oct. 01, 2014
Akron Polymer Systems, Inc., Akron, OH (US);
Sumitomo Bakelite Co., Ltd., Shinagawa-ku, JP;
Limin Sun, Copley, OH (US);
Dong Zhang, Uniontown, OH (US);
Jiaokai Jing, Uniontown, OH (US);
Frank W. Harris, Boca Raton, FL (US);
Hideo Umeda, Kobe, JP;
Ritsuya Kawasaki, Kobe, JP;
Toshihiko Katayama, Kobe, JP;
Yusuke Inoue, Kobe, JP;
Jun Okada, Kobe, JP;
Mizuho Inoue, Kobe, JP;
Manabu Naito, Kobe, JP;
AKRON POLYMER SYSTEMS, INC., Akron, OH (US);
SUMITOMO BAKELITE CO., LTD., Shinagawa-ku, JP;
Abstract
The present disclosure, in one aspect, relates to a polyamide solution including an aromatic polyamide and a solvent, wherein the aromatic polyamide includes at least two types of constitutional units, and a change rate of coefficient of thermal expansion (CTE) of a cast film produced by casting the polyamide solution on a glass plate and CTE of the same cast film after being subjected to a heat treatment at temperature of 200° C. to 450° C. (=CTE after heat treatment/CTE before heat treatment) is 1.3 or less.