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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 11421086 B1

PDFFull Text
Date of Patent:
Aug. 23, 2022

Filed:

Jun. 28, 2019

Processes for forming fluoropolymer articles

Applicants:

W.l. Gore & Associates Gmbh, Putzbrunn, DE;

W.l. Gore & Associates, Inc., Newark, DE (US);

Inventors:

Michael Wendlandt, Ottobrunn, DE;

Wolfgang Bürger, Burgrain, DE;

John William Dolan, Greenville, DE (US);

Assignees:

W.L. Gore & Associates GmbH, Putzbrunn, DE;

W.L. Gore & Associates, Inc., Newark, DE (US);

Attorney:

Greenberg Traurig, LLP

Primary Examiner:

Leo B Tentoni

Int. Cl.
CPC ...
B29C 43/24 (2006.01); B29C 55/06 (2006.01); B29C 55/12 (2006.01); B29C 55/18 (2006.01); D01D 5/12 (2006.01); D01D 5/42 (2006.01); D01D 10/02 (2006.01); D02J 3/08 (2006.01); D02J 13/00 (2006.01); C08J 5/00 (2006.01); C08K 5/01 (2006.01); D01F 6/12 (2006.01); D01D 5/16 (2006.01); B01D 67/00 (2006.01); B01D 69/02 (2006.01); B01D 71/32 (2006.01); A61C 15/04 (2006.01); B29C 48/00 (2019.01); B29C 55/00 (2006.01); B29K 27/12 (2006.01); B29K 105/00 (2006.01); B29K 27/18 (2006.01);
U.S. Cl.
CPC ...
C08J 5/00 (2013.01); A61C 15/041 (2013.01); B01D 67/0009 (2013.01); B01D 67/0027 (2013.01); B01D 69/02 (2013.01); B01D 71/32 (2013.01); B29C 48/022 (2019.02); B29C 55/005 (2013.01); B29C 55/065 (2013.01); C08K 5/01 (2013.01); D01D 5/16 (2013.01); D01D 5/423 (2013.01); D01D 5/426 (2013.01); D01F 6/12 (2013.01); B01D 2325/06 (2013.01); B29K 2027/12 (2013.01); B29K 2027/18 (2013.01); B29K 2105/007 (2013.01); Y10T 428/139 (2015.01); Y10T 428/24355 (2015.01); Y10T 428/2978 (2015.01);
Abstract

The present invention relates to a process for producing a fluoropolymer article having a high surface roughness and high coarseness which comprises the following steps: The present invention further relates to a fluoropolymer article obtainable by a process according to the invention. The present invention furthermore relates to a fiber comprising, or consisting of, a fluoropolymer having a surface roughness expressed as a peak to valley distance (Rt) greater than 10 micrometer and/or an average surface roughness (Ra) greater than 1.5 micrometer. The present invention furthermore relates to a membrane comprising, or consisting of, a fluoropolymer having a coarseness index ρ/EBP of at least 0.3, an air permeability of 15 ft/ft/min or higher and a node aspect ratio of below 25.

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