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Patent Searching and Data


Title:
SPUNBONDED NONWOVEN FABRIC FOR FILTER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2018/221122
Kind Code:
A1
Abstract:
Provided is a spunbonded nonwoven fabric for a filter, the spunbonded nonwoven fabric comprising a composite polyester fiber in which a low melting point polyester having a melting point 10-40°C lower than the melting point of a high melting point polyester is disposed around the high melting point polyester, wherein the spunbonded nonwoven fabric has a surface layer portion and a back layer portion, the single fiber fineness of the composite polyester fiber in the surface layer portion is at least 1 dtex and less than 3 dtex, the single fiber fineness in the back layer portion is 3-5 dtex, and the basis weight of the spunbonded nonwoven fabric is 130-300 g/m2. The spunbonded nonwoven fabric for a filter has high stiffness and air permeability in a thick fineness layer as well as excellent dust resistance in a thin fineness layer.

Inventors:
MIZOGAMI SHINOBU (JP)
NAKANO YOHEI (JP)
SHIMADA DAIKI (JP)
Application Number:
PCT/JP2018/017617
Publication Date:
December 06, 2018
Filing Date:
May 07, 2018
Export Citation:
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Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D39/16; D04H3/011; D04H3/147
Foreign References:
JP2004019061A2004-01-22
JP2008151980A2008-07-03
JP2006150222A2006-06-15
JPH1190135A1999-04-06
JPS558858A1980-01-22
JPS5353076A1978-05-15
US6090731A2000-07-18
JPS534043B21978-02-14
JPH07157960A1995-06-20
JP2009006318A2009-01-15
JPH01192406A1989-08-02
JPS6490135A1989-04-06
Other References:
See also references of EP 3632524A4
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