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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 11563256 B1

PDFFull Text
Date of Patent:
Jan. 24, 2023

Filed:

Oct. 03, 2017

Method of making a microporous material

Applicant:

Daramic, Llc, Charlotte, NC (US);

Inventors:

Eric H. Miller, Philpot, KY (US);

Joseph G. Yaritz, Utica, KY (US);

Mark T. Demeuse, Charlotte, NC (US);

J. Kevin Whear, Utica, KY (US);

Assignee:

Celgard, LLC, Charlotte, NC (US);

Attorney:

Hammer & Associates, P.C.

Primary Examiner:

Nahida Sultana

Int. Cl.
CPC ...
H01M 50/446 (2021.01); B29C 48/00 (2019.01); B29C 48/08 (2019.01); B01D 67/00 (2006.01); B01D 71/26 (2006.01); C08J 5/18 (2006.01); C08L 23/06 (2006.01); H01M 50/403 (2021.01); H01M 50/431 (2021.01); H01M 50/463 (2021.01); B29C 67/20 (2006.01); B29B 7/90 (2006.01); B29C 70/58 (2006.01); C08K 3/36 (2006.01); H01M 8/1051 (2016.01); H01M 10/0525 (2010.01); H01M 10/06 (2006.01); H01M 8/0289 (2016.01); B29K 23/00 (2006.01); B29K 105/04 (2006.01); B29K 105/16 (2006.01); B29K 507/04 (2006.01); B29K 509/00 (2006.01); B29L 31/34 (2006.01); B29L 31/00 (2006.01); H01M 8/10 (2016.01);
U.S. Cl.
CPC ...
H01M 50/446 (2021.01); B01D 67/003 (2013.01); B01D 67/0027 (2013.01); B01D 71/26 (2013.01); B29B 7/90 (2013.01); B29C 48/0011 (2019.02); B29C 48/0018 (2019.02); B29C 48/022 (2019.02); B29C 48/08 (2019.02); B29C 67/202 (2013.01); B29C 70/58 (2013.01); C08J 5/18 (2013.01); C08K 3/36 (2013.01); C08L 23/06 (2013.01); H01M 8/1051 (2013.01); H01M 10/0525 (2013.01); H01M 10/06 (2013.01); H01M 50/403 (2021.01); H01M 50/431 (2021.01); H01M 50/463 (2021.01); B01D 2323/00 (2013.01); B01D 2323/20 (2013.01); B01D 2325/34 (2013.01); B29K 2023/0683 (2013.01); B29K 2105/04 (2013.01); B29K 2105/16 (2013.01); B29K 2507/04 (2013.01); B29K 2509/00 (2013.01); B29L 2031/3468 (2013.01); B29L 2031/755 (2013.01); C08J 2323/06 (2013.01); C08L 2203/20 (2013.01); C08L 2205/02 (2013.01); C08L 2205/025 (2013.01); C08L 2207/062 (2013.01); C08L 2207/068 (2013.01); H01M 8/0289 (2013.01); H01M 2008/1095 (2013.01); Y02P 70/50 (2015.11); Y10T 428/249978 (2015.04); Y10T 428/249979 (2015.04); Y10T 428/249986 (2015.04);
Abstract

A method for producing a microporous material comprising the steps of: providing an ultrahigh molecular weight polyethylene (UHMWPE); providing a filler; providing a processing plasticizer; adding the filler to the UHMWPE in a mixture being in the range of from about 1:9 to about 15:1 filler to UHMWPE by weight; adding the processing plasticizer to the mixture; extruding the mixture to form a sheet from the mixture; calendering the sheet; extracting the processing plasticizer from the sheet to produce a matrix comprising UHMWPE and the filler distributed throughout the matrix; stretching the microporous material in at least one direction to a stretch ratio of at least about 1.5 to produce a stretched microporous matrix; and subsequently calendering the stretched microporous matrix to produce a microporous material which exhibits improved physical and dimensional stability properties over the stretched microporous matrix.

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