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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 9057148 B1

PDFFull Text
Date of Patent:
Jun. 16, 2015

Filed:

May. 30, 2011

High-strength polypropylene fiber and method for producing the same

Applicants:

Tatsuya Kitagawa, Toyota, JP;

Tadahisa Iwata, Tokyo, JP;

Chizuru Hongo, Tokyo, JP;

Inventors:

Tatsuya Kitagawa, Toyota, JP;

Tadahisa Iwata, Tokyo, JP;

Chizuru Hongo, Tokyo, JP;

Assignees:

TOYOTA JIDOSHA KABUSHIKI KAISHA, Aichi-ken, JP;

THE UNIVERSITY OF TOKYO, Tokyo, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Rip A Lee

Int. Cl.
CPC ...
C08L 23/12 (2006.01); C08L 23/00 (2006.01); D01D 5/00 (2006.01); D02G 3/02 (2006.01); D01F 6/06 (2006.01); D01D 5/098 (2006.01); D02J 1/22 (2006.01);
U.S. Cl.
CPC ...
D02G 3/02 (2013.01); D01F 6/06 (2013.01); C08L 23/12 (2013.01); D01D 5/098 (2013.01); D02J 1/22 (2013.01);
Abstract

A method for producing a polypropylene fiber, which can produce a high strength polypropylene fiber without using a special raw material and/or means is provided. The method for producing a polypropylene fiber includes the step of spinning a melt extruded fiber, the step of keeping cold, and the step of drawing, in which a ratio of a take-off speed with respect to an extrusion speed in the step of spinning the melt-extruded fiber is 50 to 750.

Find Patent Forward Citations

Kitagawa, Tatsuya. (2015). High-strength polypropylene fiber and method for producing the same (U.S. Patent No. 9057148). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9057148

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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