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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 10772984 B1

PDFFull Text
Date of Patent:
Sep. 15, 2020

Filed:

Apr. 12, 2016

Elastic porous film and article

Applicant:

Nitto Denko Corporation, Osaka, JP;

Inventors:

Yasuhiro Takeda, Matsuyama, JP;

Yoshitake Shigematsu, Matsuyama, JP;

Kohei Takeda, Ibaraki, JP;

Shou Uchida, Ibaraki, JP;

Muneshige Nakagawa, Ibaraki, JP;

Shinsuke Ikishima, Ibaraki, JP;

Assignee:

NITTO DENKO CORPORATION, Osaka, JP;

Attorney:

Greenblum & Bernstein, P.L.C.

Primary Examiner:

Michael Zhang

Int. Cl.
CPC ...
B29D 7/01 (2006.01); C08K 13/04 (2006.01); B29C 55/10 (2006.01); A61F 13/15 (2006.01); A61F 13/49 (2006.01); A61L 15/22 (2006.01); C08L 23/12 (2006.01); B29K 23/00 (2006.01); B29L 31/48 (2006.01); B29K 105/16 (2006.01); A61L 15/24 (2006.01); A61L 15/18 (2006.01); C08J 9/00 (2006.01); C08K 3/26 (2006.01); C08L 23/04 (2006.01); B32B 27/32 (2006.01); A61F 13/00 (2006.01); B29C 55/00 (2006.01); A61F 13/514 (2006.01); B29C 55/04 (2006.01); A61F 13/511 (2006.01); C08J 5/18 (2006.01); A61L 15/20 (2006.01); A61L 15/42 (2006.01); C08L 23/14 (2006.01); B32B 27/08 (2006.01); B32B 27/30 (2006.01); B32B 27/20 (2006.01); B32B 27/36 (2006.01); B32B 3/26 (2006.01);
U.S. Cl.
CPC ...
A61L 15/24 (2013.01); A61F 13/00012 (2013.01); A61F 13/15203 (2013.01); A61F 13/49009 (2013.01); A61F 13/51121 (2013.01); A61F 13/51401 (2013.01); A61L 15/18 (2013.01); A61L 15/20 (2013.01); A61L 15/225 (2013.01); A61L 15/42 (2013.01); B29C 55/005 (2013.01); B29C 55/04 (2013.01); B29C 55/10 (2013.01); B29D 7/01 (2013.01); B32B 3/266 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/205 (2013.01); B32B 27/306 (2013.01); B32B 27/308 (2013.01); B32B 27/32 (2013.01); B32B 27/327 (2013.01); B32B 27/36 (2013.01); C08J 5/18 (2013.01); C08J 9/00 (2013.01); C08K 3/26 (2013.01); C08K 13/04 (2013.01); C08L 23/04 (2013.01); C08L 23/12 (2013.01); C08L 23/14 (2013.01); A61F 2013/15552 (2013.01); B29K 2023/00 (2013.01); B29K 2105/16 (2013.01); B29K 2995/0065 (2013.01); B29L 2031/4835 (2013.01); B29L 2031/4878 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2264/025 (2013.01); B32B 2264/0235 (2013.01); B32B 2264/102 (2013.01); B32B 2264/104 (2013.01); B32B 2270/00 (2013.01); B32B 2307/50 (2013.01); B32B 2307/724 (2013.01); B32B 2555/02 (2013.01); C08J 2323/12 (2013.01); C08J 2423/16 (2013.01); C08K 2003/265 (2013.01); C08K 2201/003 (2013.01); C08K 2201/005 (2013.01); C08L 2203/02 (2013.01); C08L 2203/16 (2013.01); C08L 2205/025 (2013.01);
Abstract

The stretchable porous film of the present invention includes voids in a surface thereof, in which: the stretchable porous film has an air permeability measured with an Oken-type air permeability meter of less than 99,999 sec/100 cc; the stretchable porous film has such an extending direction that an air permeability measured with the Oken-type air permeability meter in a state in which the stretchable porous film is extended by 100% becomes less than 60,000 sec/100 cc; and the stretchable porous film has such a pulling direction that when, in a hysteresis test, the stretchable porous film is pulled from a width of 20 mm and an inter-chuck distance of 30 mm to an inter-chuck distance of 60 mm at a pulling speed of 50 mm/min and held for 1 minute, and then the pulling of the inter-chuck distance is released, a residual strain becomes 10 mm or less.

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