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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 10874964 B1

PDFFull Text
Date of Patent:
Dec. 29, 2020

Filed:

Feb. 20, 2017

Filter medium for liquid filter and liquid filter

Applicant:

Teijin Frontier Co., Ltd., Osaka, JP;

Inventors:

Kazuyoshi Sakita, Osaka, JP;

Mie Kamiyama, Osaka, JP;

Assignee:

TEIJIN FRONTIER CO.. LTD., Osaka, JP;

Attorney:

Sughrue Mion, PLLC

Primary Examiner:

Ana M Fortuna

Int. Cl.
CPC ...
B01D 39/16 (2006.01); D21H 13/24 (2006.01); D21H 13/26 (2006.01); D21H 27/08 (2006.01); D04H 1/541 (2012.01); D21H 13/14 (2006.01); D21H 15/10 (2006.01); D01D 5/26 (2006.01); D01F 8/12 (2006.01); D01F 8/14 (2006.01); D01F 8/16 (2006.01);
U.S. Cl.
CPC ...
B01D 39/163 (2013.01); B01D 39/16 (2013.01); D01D 5/26 (2013.01); D01F 8/12 (2013.01); D01F 8/14 (2013.01); D01F 8/16 (2013.01); D04H 1/541 (2013.01); D21H 13/14 (2013.01); D21H 13/24 (2013.01); D21H 13/26 (2013.01); D21H 15/10 (2013.01); D21H 27/08 (2013.01); B01D 2239/0233 (2013.01); B01D 2239/0618 (2013.01); B01D 2239/086 (2013.01); B01D 2239/1208 (2013.01); B01D 2239/1216 (2013.01); B01D 2239/1225 (2013.01); B01D 2239/1233 (2013.01); B01D 2239/1291 (2013.01); D10B 2331/02 (2013.01); D10B 2331/04 (2013.01); D10B 2331/301 (2013.01); D10B 2401/063 (2013.01); D10B 2505/04 (2013.01);
Abstract

The invention addresses the problem of providing a filter medium for a liquid filter, which has a low weight per unit and yet has high strength, high collectability, and a long life, and also a liquid filter. As a means for resolution, using a main fiber having a fiber diameter of 4.0 μm or less and an aspect ratio of 100 to 2,500 and a binder fiber having a fiber diameter of 3.0 μm or less and an aspect ratio of 100 to 2,500, a filter medium for a liquid filter in which the weight proportion of the binder fiber relative to the weight of the filter medium is 10 to 50 wt %, and the weight per unit is within a range of 5 to 80 g/m, and also a liquid filter are obtained.

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