EP 3853401 A4 20230419 - BI-COMPONENT FIBERS AND NONWOVEN MATERIALS PRODUCED THEREFROM
Title (en)
BI-COMPONENT FIBERS AND NONWOVEN MATERIALS PRODUCED THEREFROM
Title (de)
ZWEIKOMPONENTENFASERN UND DARAUS HERGESTELLTE VLIESSTOFFE
Title (fr)
FIBRES À DEUX COMPOSANTS ET MATÉRIAUX NON TISSÉS PRODUITS A PARTIR DESDITES FIBRES
Publication
Application
Priority
- US 201862732599 P 20180918
- EP 18199603 A 20181010
- US 2019048978 W 20190830
Abstract (en)
[origin: WO2020060747A1] A method can include (a) extruding a bi-component fiber comprising: a first component comprising a first polypropylene homopolymer; and a second component comprising a blend that comprises a propylene-based elastomer and a second polypropylene homopolymer, wherein the blend has a melt flow rate that is at least 20% greater than or at least 20% less than a melt flow rate of the first polypropylene homopolymer; (b) cooling the bi-component fiber; and (c) thermally and/or mechanically activating the bi-component fiber to cause the bi-component fiber to curl.
IPC 8 full level
D01D 5/098 (2006.01); D01D 5/22 (2006.01); D01F 6/06 (2006.01); D01F 8/06 (2006.01); D04H 1/4291 (2012.01); D04H 1/4382 (2012.01); D04H 1/4391 (2012.01); D04H 3/007 (2012.01); D04H 3/018 (2012.01); D04H 3/147 (2012.01)
CPC (source: EP)
D01D 5/0985 (2013.01); D01D 5/22 (2013.01); D01F 6/06 (2013.01); D04H 1/4291 (2013.01); D04H 1/4382 (2013.01); D04H 1/4391 (2013.01); D04H 3/007 (2013.01); D04H 3/018 (2013.01); D04H 3/147 (2013.01)
Citation (search report)
- [IAY] EP 1129247 A1 20010905 - KIMBERLY CLARK CO [US]
- [YA] JP H11323715 A 19991126 - MITSUI CHEMICALS INC
- [A] US 6723669 B1 20040420 - CLARK DARRYL FRANKLIN [US], et al
- [A] JP 2011021300 A 20110203 - DAIWABO HOLDINGS CO LTD, et al
- [A] EP 2559793 A1 20130220 - MITSUI CHEMICALS INC [JP]
- See references of WO 2020060747A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
WO 2020060747 A1 20200326; CN 113039315 A 20210625; EP 3853401 A1 20210728; EP 3853401 A4 20230419
DOCDB simple family (application)
US 2019048978 W 20190830; CN 201980075237 A 20190830; EP 19862229 A 20190830