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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.:

US 12264418 B1

PDFFull Text
Date of Patent:
Apr. 01, 2025

Filed:

Sep. 02, 2022

Method for producing drawn conjugated fiber, and drawn conjugated fiber

Applicant:

Ube Exsymo Co., Ltd., Tokyo, JP;

Inventors:

Hirohumi Yashiro, Tokyo, JP;

Kouki Endou, Tokyo, JP;

Tatsunori Tsukahara, Tokyo, JP;

Assignee:

UBE EXSYMO CO., LTD., Tokyo, JP;

Attorney:

Birch, Stewart, Kolasch & Birch, LLP

Primary Examiner:

Leo B Tentoni

Int. Cl.
CPC ...
C08K 5/1575 (2006.01); B29C 48/05 (2019.01); C08K 5/00 (2006.01); C08K 5/52 (2006.01); C08K 5/521 (2006.01); D01D 5/08 (2006.01); D01D 5/098 (2006.01); D01D 5/12 (2006.01); D01D 5/34 (2006.01); D01F 1/10 (2006.01); D01F 8/06 (2006.01); D02J 1/22 (2006.01); D04H 1/4291 (2012.01); D04H 1/4382 (2012.01); D04H 1/541 (2012.01); B29K 23/00 (2006.01); D01F 6/46 (2006.01);
U.S. Cl.
CPC ...
D01F 8/06 (2013.01); B29C 48/05 (2019.02); C08K 5/0083 (2013.01); C08K 5/0091 (2013.01); D01D 5/12 (2013.01); D01D 5/34 (2013.01); D01F 1/10 (2013.01); D02J 1/222 (2013.01); D04H 1/4291 (2013.01); D04H 1/43828 (2020.05); D04H 1/5412 (2020.05); B29K 2023/10 (2013.01); D01F 6/46 (2013.01); D10B 2321/021 (2013.01); D10B 2321/022 (2013.01);
Abstract

Provided are a method for producing a drawn conjugated fiber, capable of producing a conjugated fiber having a high strength and a thin fineness, and a drawn conjugated fiber. A drawn conjugated fiber is produced by performing a spinning step of obtaining an undrawn fiber having a core-sheath structure in which a core material is a resin containing, as a main component, a crystalline propylene polymer and a sheath material is a resin containing, as a main component, an olefin polymer having a melting point lower than that of the core material, by means of melt-spinning (step S); and a drawing step of drawing the undrawn fiber (step S).

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Yashiro, Hirohumi. (2025). Method for producing drawn conjugated fiber, and drawn conjugated fiber (U.S. Patent No. 12264418). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12264418

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