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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 12139819 B1

PDFFull Text
Date of Patent:
Nov. 12, 2024

Filed:

Sep. 30, 2019

Wet spun fibers, wet formed film, and production method therefor

Applicant:

National University Corporation Okayama University, Okayama, JP;

Inventors:

Tsutomu Ono, Okayama, JP;

Takaichi Watanabe, Okayama, JP;

Assignee:

NATIONAL UNIVERSITY CORPORATION OKAYAMA UNIVERSITY, Okayama, JP;

Attorney:

Wenderoth, Lind & Ponack, L.L.P.

Primary Examiner:

Leo B Tentoni

Int. Cl.
CPC ...
D01F 2/02 (2006.01); D01D 4/02 (2006.01); D01D 5/06 (2006.01); D01F 2/00 (2006.01); D01F 2/24 (2006.01); D01F 2/28 (2006.01); D01F 6/04 (2006.01); D01F 6/10 (2006.01); D01F 6/14 (2006.01); D01F 6/22 (2006.01); D01F 6/60 (2006.01); D01F 6/62 (2006.01); D01F 9/12 (2006.01); D01F 9/22 (2006.01); D04H 1/724 (2012.01); D04H 3/033 (2012.01);
U.S. Cl.
CPC ...
D01D 4/02 (2013.01); D01D 5/06 (2013.01); D01F 2/00 (2013.01); D01F 6/60 (2013.01); D01F 6/62 (2013.01); D01F 9/12 (2013.01); D04H 1/724 (2013.01); D04H 3/033 (2013.01); D10B 2101/12 (2013.01); D10B 2201/22 (2013.01); D10B 2201/28 (2013.01); D10B 2321/02 (2013.01); D10B 2321/041 (2013.01); D10B 2321/06 (2013.01); D10B 2321/08 (2013.01); D10B 2321/121 (2013.01); D10B 2331/02 (2013.01); D10B 2331/04 (2013.01);
Abstract

The method for producing wet spun fibers/a wet formed film using a double-walled pipe type micronozzle apparatus according to the present invention is a production method, wherein, in a step of extruding an internal phase comprising a fiber/film material and a good solvent for the fiber/film material in a linear form from the circular/rectangular end of the internal pipe of the apparatus into an external phase comprising a poor solvent for the fiber/film material, the external phase flowing in the external pipe of the apparatus, the ratio of the external phase flow rate to the internal phase flow rate is set to 1 or more, and further for the wet spun fibers, the external phase line speed at the orifice portion at which the internal phase and the external phase merge is set to 0.1 msor more.

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