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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 9138690 B1

PDFFull Text
Date of Patent:
Sep. 22, 2015

Filed:

Oct. 16, 2009

Method for producing air-permeable composite sheet

Applicant:

Hiroshi Manabe, Tokyo, JP;

Inventor:

Hiroshi Manabe, Tokyo, JP;

Assignee:

W. L. Gore & Associates, Co., Ltd., Tokyo, JP;

Attorney:

Amy L. Miller

Primary Examiner:

Larry Thrower

Assistant Examiner:

Xue Liu

Int. Cl.
CPC ...
B29C 55/02 (2006.01); B01D 69/12 (2006.01); B01D 39/16 (2006.01); C08J 5/18 (2006.01); C08J 9/40 (2006.01); B01D 67/00 (2006.01); B01D 71/36 (2006.01); B29C 55/04 (2006.01); B29C 55/12 (2006.01); B29K 27/18 (2006.01); B29K 105/00 (2006.01); B29K 105/04 (2006.01); B29L 31/14 (2006.01);
U.S. Cl.
CPC ...
B01D 69/12 (2013.01); B01D 39/1692 (2013.01); B01D 67/0081 (2013.01); B01D 71/36 (2013.01); B29C 55/04 (2013.01); B29C 55/12 (2013.01); C08J 5/18 (2013.01); C08J 9/40 (2013.01); B01D 2239/10 (2013.01); B01D 2323/00 (2013.01); B29K 2027/18 (2013.01); B29K 2105/0061 (2013.01); B29K 2105/04 (2013.01); B29L 2031/14 (2013.01); C08J 2327/18 (2013.01); C08J 2483/00 (2013.01); Y10T 428/249991 (2015.04);
Abstract

It is an objective of the present invention to provide a method for producing an air-permeable composite sheet which has excellent mechanical strength and compression resistance as well as PTFE's innate property such as air-permeability, water repellency, heat resistance and chemical resistance; and a filter and a fabrics material containing the air-permeable composite sheet produced by the method as a constituent material. The method for producing an air-permeable composite sheet according to the present invention is characterized in comprising steps of filling pores of a porous PTFE sheet with a hardenable material solution; hardening or semi-hardening the porous PTFE sheet filled with the hardenable material solution; and expanding the hardened or semi-hardened porous PTFE sheet.

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