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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 11148347 B1

PDFFull Text
Date of Patent:
Oct. 19, 2021

Filed:

Nov. 17, 2015

Biaxially stretched porous film

Applicant:

Kimberly-clark Worldwide, Inc., Neenah, WI (US);

Inventors:

Vasily A. Topolkaraev, Appleton, WI (US);

Ryan J. McEneany, Appleton, WI (US);

Steven R. Stopper, Suwanee, GA (US);

Assignee:

Kimberly Clark Worldwide, Inc., Neenah, WI (US);

Attorney:

Dority & Manning, P.A.

Primary Examiner:

Hai Vo

Int. Cl.
CPC ...
B29C 55/14 (2006.01); B29C 48/08 (2019.01); B29C 48/00 (2019.01); B29C 48/285 (2019.01); B29C 48/40 (2019.01); B29C 48/88 (2019.01); B29D 7/01 (2006.01); B29C 48/565 (2019.01); B29C 48/92 (2019.01); B29C 48/465 (2019.01); B32B 27/20 (2006.01); B32B 27/32 (2006.01); B29K 23/00 (2006.01); B29K 463/00 (2006.01);
U.S. Cl.
CPC ...
B29C 55/143 (2013.01); B29C 48/0018 (2019.02); B29C 48/08 (2019.02); B29C 48/297 (2019.02); B29C 48/402 (2019.02); B29C 48/468 (2019.02); B29C 48/565 (2019.02); B29C 48/914 (2019.02); B29C 48/92 (2019.02); B29D 7/01 (2013.01); B32B 27/205 (2013.01); B32B 27/327 (2013.01); B29C 2948/92514 (2019.02); B29C 2948/92704 (2019.02); B29K 2023/12 (2013.01); B29K 2463/00 (2013.01);
Abstract

A film that comprises a thermoplastic composition that contains a continuous phase that includes a polyolefin matrix polymer and a nanoinclusion additive dispersed within the continuous phase in the form of discrete domains is provided. The film is biaxially stretched in a machine direction and cross-machine direction to form a porous network in the composition. The porous network contains nanopores having a maximum cross-sectional dimension of about 800 nanometers or less. At least a portion of the nanopores are oriented in the cross-machine direction so that the axial dimension generally extends in the cross-machine direction and the cross-sectional dimension generally extends in the machine direction.

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