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)
NAKANO YOHEI (JP)
SHIMADA DAIKI (JP)
Application Number:
PCT/JP2018/017617
Publication Date:
December 06, 2018
Filing Date:
May 07, 2018
Export Citation:
Assignee:
TORAY INDUSTRIES (JP)
International Classes:
B01D39/16; D04H3/011; D04H3/147
Foreign References:
JP2004019061A | 2004-01-22 | |||
JP2008151980A | 2008-07-03 | |||
JP2006150222A | 2006-06-15 | |||
JPH1190135A | 1999-04-06 | |||
JPS558858A | 1980-01-22 | |||
JPS5353076A | 1978-05-15 | |||
US6090731A | 2000-07-18 | |||
JPS534043B2 | 1978-02-14 | |||
JPH07157960A | 1995-06-20 | |||
JP2009006318A | 2009-01-15 | |||
JPH01192406A | 1989-08-02 | |||
JPS6490135A | 1989-04-06 |
Other References:
See also references of EP 3632524A4
Download PDF: