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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 11749844 B1

PDFFull Text
Date of Patent:
Sep. 05, 2023

Filed:

Aug. 11, 2014

Instantaneously wettable polymer fiber sheet

Applicant:

Amtek Research International Llc, Lebanon, OR (US);

Inventors:

Chi Thuong-Le La, Happy Valley, OR (US);

Matthew Alan Warren, Salem, OR (US);

James Emanuel, Corvallis, OR (US);

Richard W. Pekala, Corvallis, OR (US);

Assignee:

Amtek Research International LLC, Lebanon, OR (US);

Attorney:

Dorsey & Whitney LLP

Primary Examiner:

Shawn Mckinnon

Int. Cl.
CPC ...
B29C 48/05 (2019.01); B29C 48/21 (2019.01); H01M 10/42 (2006.01); B29C 48/00 (2019.01); H01M 10/06 (2006.01); D04H 1/4291 (2012.01); D04H 1/435 (2012.01); D04H 1/56 (2006.01); H01M 50/44 (2021.01); H01M 50/449 (2021.01); H01M 50/414 (2021.01); H01M 50/406 (2021.01); H01M 50/491 (2021.01); H01M 50/451 (2021.01); B29C 43/24 (2006.01); C08J 5/18 (2006.01); C08K 5/42 (2006.01); D01D 5/00 (2006.01); D01D 5/08 (2006.01); D01D 5/088 (2006.01); D01F 1/10 (2006.01); D01F 6/16 (2006.01); B29K 67/00 (2006.01); B29L 7/00 (2006.01); B29L 31/34 (2006.01);
U.S. Cl.
CPC ...
H01M 10/4235 (2013.01); B29C 43/24 (2013.01); B29C 48/0021 (2019.02); B29C 48/05 (2019.02); C08J 5/18 (2013.01); C08K 5/42 (2013.01); D01D 5/003 (2013.01); D01D 5/08 (2013.01); D01D 5/088 (2013.01); D01F 1/10 (2013.01); D01F 6/16 (2013.01); D04H 1/4291 (2013.01); D04H 1/435 (2013.01); D04H 1/56 (2013.01); H01M 10/06 (2013.01); H01M 50/406 (2021.01); H01M 50/414 (2021.01); H01M 50/44 (2021.01); H01M 50/449 (2021.01); H01M 50/451 (2021.01); H01M 50/491 (2021.01); B29K 2067/003 (2013.01); B29K 2067/006 (2013.01); B29L 2007/002 (2013.01); B29L 2031/3468 (2013.01); C08J 2367/02 (2013.01); C08J 2471/02 (2013.01); H01M 2220/20 (2013.01);
Abstract

A polymer fiber sheet exhibits high porosity and good tensile properties in both 'wet' and 'dry' states. A fiber modifying agent is incorporated into a polymer extrusion and fiber formation process to produce a highly porous polymer fiber sheet that is instantaneously wettable by an aqueous medium. The fiber modifying agent functions as either one or both (1) a plasticizer that reduces the polymer extrudate melt viscosity and allows the formation of fine fibers during processing and (2) a surface modifying agent that promotes the instantaneous and sustainable wettability of individual polymer fibers and a porous fiber sheet formed from them. The polymer fiber sheet maintains its wettability even after repeated washing and drying cycles. The resultant fiber sheet can be densified and embossed to provide a desired thickness and porosity, while at the same time longitudinal ribs with desired pattern can also be formed on the fiber sheet.

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