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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 9732453 B1

PDFFull Text
Date of Patent:
Aug. 15, 2017

Filed:

Mar. 25, 2015

Nonwoven fabric sheet, and extraction filter and extraction bag using the same

Applicant:

Ohki Co., Ltd., Osaka-shi, Osaka, JP;

Inventors:

Mitsunori Saitoh, Osaka, JP;

Masahiro Nakamuro, Osaka, JP;

Naoko Yamaguchi, Osaka, JP;

Assignee:

OHKI CO., LTD., Osaka-shi, JP;

Attorney:

Oliff PLC

Primary Examiner:

Michael C Miggins

Int. Cl.
CPC ...
D04H 1/435 (2012.01); D04H 1/4374 (2012.01); D04H 3/011 (2012.01); D04H 3/16 (2006.01); B65D 85/808 (2006.01); D04H 1/54 (2012.01); D04H 1/56 (2006.01); D04H 3/14 (2012.01); B01D 11/02 (2006.01); B01D 29/11 (2006.01); B01D 29/27 (2006.01); B01D 39/16 (2006.01); B32B 1/02 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 7/02 (2006.01); B32B 7/04 (2006.01);
U.S. Cl.
CPC ...
D04H 1/435 (2013.01); B01D 11/02 (2013.01); B01D 29/111 (2013.01); B01D 29/27 (2013.01); B01D 39/163 (2013.01); B32B 1/02 (2013.01); B32B 5/022 (2013.01); B32B 5/26 (2013.01); B32B 7/02 (2013.01); B32B 7/045 (2013.01); B65D 85/808 (2013.01); D04H 1/4374 (2013.01); D04H 1/54 (2013.01); D04H 1/56 (2013.01); D04H 3/011 (2013.01); D04H 3/14 (2013.01); D04H 3/16 (2013.01); B01D 2239/0622 (2013.01); B01D 2239/0627 (2013.01); B01D 2239/0672 (2013.01); B01D 2239/1233 (2013.01); B32B 2250/20 (2013.01); B32B 2262/0276 (2013.01); B32B 2307/726 (2013.01); B32B 2439/46 (2013.01); D10B 2505/04 (2013.01);
Abstract

The present invention provides a nonwoven fabric sheet for use in extraction filters having high sealing strength and extraction filters manufactured using the nonwoven fabric sheet. The nonwoven fabric sheet includes a first layer including a spunbonded nonwoven fabric formed from a polyester-based resin having an IV value of 0.60 to 1.00, a crystallinity of 30% to 80%, a crystalline orientation of 60% to 95%, and a birefringence (Δn) of 0.040 to 0.100 and provided with a partial thermocompression bonding section whose thermocompression bonding area rate is in the range of 5% to 30%, and a second layer including a meltblown nonwoven fabric formed from a polyester-based resin blown onto a surface of the first layer and solidified to have a crystallinity of 0% to 14%. The extraction filters are formed by sealing by welding the nonwoven fabric sheet with the second layer of the sheet placed inside.

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