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:
Feb. 24, 2026
Filed:
Mar. 17, 2022
Applicant:
Kuraray Co., Ltd., Kurashiki, JP;
Inventors:
Assignee:
KURARAY CO., LTD., Kurashiki, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
D01D 5/10 (2006.01); D01D 1/04 (2006.01); D01F 1/07 (2006.01);
U.S. Cl.
CPC ...
D01D 5/10 (2013.01); D01D 1/04 (2013.01); D01F 1/07 (2013.01); D10B 2331/042 (2013.01); D10B 2401/20 (2013.01);
Abstract
Provided are a polycarbonate fiber having a specific orientation degree and/or a specific birefringence value, a fiber structure as well as a resin composite body. The polycarbonate fiber may have an orientation degree (ft) of lower than 0.70, the orientation degree (ft) being defined by the following formula: ft=1−(1.0/C), C: obtained sonic velocity (km/sec), and may have a birefringence value of 0.04 or lower. The polycarbonate fiber may comprise a polycarbonate resin having a number-average molecular weight (Mn) of from 12000 to 40000 and/or a weight-average molecular weight (Mw) of from 25000 to 80000.