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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 9180392 B1

PDFFull Text
Expired
Date of Patent:
Nov. 10, 2015

Filed:

Nov. 27, 2012

Mixed-fiber nonwoven fabric and filter medium using the same

Applicant:

Toray Industries, Inc., Tokyo, JP;

Inventors:

Yuji Iyama, Otsu, JP;

Akito Kuroda, Otsu, JP;

Yoshikazu Yakake, Otsu, JP;

Assignee:

Toray Industries, Inc., Tokyo, JP;

Attorney:

RatnerPrestia

Primary Examiner:

Robert Clemente

Assistant Examiner:

Karla Hawkins

Int. Cl.
CPC ...
B01D 39/00 (2006.01); B01D 39/14 (2006.01); B01D 39/16 (2006.01); B03C 3/28 (2006.01); D04H 3/016 (2012.01); D04H 3/153 (2012.01); D04H 3/16 (2006.01); D04H 1/4382 (2012.01); D04H 1/56 (2006.01); B03C 3/66 (2006.01);
U.S. Cl.
CPC ...
B01D 39/14 (2013.01); B01D 39/16 (2013.01); B03C 3/28 (2013.01); B03C 3/66 (2013.01); D04H 1/4382 (2013.01); D04H 1/56 (2013.01); D04H 3/016 (2013.01); D04H 3/153 (2013.01); D04H 3/16 (2013.01);
Abstract

A nonwoven fabric includes mixed fibers having different fiber diameters. A group of fibers having a fiber diameter of 5.0 μm or less (fiber group A) is present at a volume fraction of 20 to 80 vol %, a group of fibers having a fiber diameter of 50.0 μm or more (fiber group B) is present at a volume fraction of 1 to 40 vol %, and a group of fibers having a fiber diameter of more than 5.0 μm and less than 50.0 μm (fiber group C) is present at a volume fraction of 0 to 79 vol %. The ratio of the median fiber diameter (B') of fiber group B to the median fiber diameter (A′) of fiber group A (B′/A′) is 35 or more.

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Iyama, Yuji. (2015). Mixed-fiber nonwoven fabric and filter medium using the same (U.S. Patent No. 9180392). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/9180392

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