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Title:
SPUNBOND NONWOVEN FABRIC FOR FILTERS, FILTER MEDIUM FOR POWDER-COATED FILTERS, AND POWDER-COATED FILTER
Document Type and Number:
WIPO Patent Application WO/2021/132409
Kind Code:
A1
Abstract:
The spunbond nonwoven fabric for filters according to the present invention is formed of thermoplastic continuous filaments comprising a high-melting-point component and a low-melting-point component, is partially fused, and has a non-fused protrusion portion and a fused recess portion. The thickness tA from one surface to the other surface of the protrusion portion in a cross-sectional surface of the nonwoven fabric, and the thickness tB from one surface to the other surface of the recess portion, and the respective distances tC, tD (tC

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Inventors:
IKEJIRI YUKI (JP)
YOSHIDA JUN (JP)
KITAMURA KOJI (JP)
Application Number:
PCT/JP2020/048312
Publication Date:
July 01, 2021
Filing Date:
December 23, 2020
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
D04H3/147; B01D39/16
Domestic Patent References:
WO2017110365A12017-06-29
WO2018221122A12018-12-06
WO2017038977A12017-03-09
WO1997037071A11997-10-09
Foreign References:
JPH09192426A1997-07-29
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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