LONG-FIBER NONWOVEN FABRIC AND FILTER REINFORCING MATERIAL USING SAME

WIPO Patent Application WO/2020/116569

A1

This long-fiber nonwoven fabric has an average fiber diameter of 30-60 µm and a per-area weight of 50-120 g/m2, and has: a 10%-elongation stress of not more than 60 N/5 cm at 80°C in the MD direction, and a folding angle of 15° or less after being pressed for 10 seconds under a pressure of 5.2 kPa at 80°C; or a surface roughness of 2.0 or more on one surface and a surface roughness of 3.5 or less on the other surface. By having this configuration, it is possible to provide a long-fiber nonwoven fabric having pleat-processability suited for a filter reinforcing material, and having: a satisfactory rigidity for having a pleat-shape retaining ability; or suitability for sticking to a filter medium.

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ODA SYOJI (JP)
YOSHIDA HIDEO (JP)
URATANI YUSUKE (JP)
FUJITA TAKUYA (JP)

PCT/JP2019/047650

June 11, 2020

December 05, 2019

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TOYO BOSEKI (JP)

D04H3/14; B01D39/16; D04H3/011

WO2016031693A1	2016-03-03
WO2019181827A1	2019-09-26

JP2017222950A	2017-12-21
JPH08276111A	1996-10-22
JP2018153758A	2018-10-04
JP2020006294A	2020-01-16

FUKAMI PATENT OFFICE, P.C. (JP)

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