Stock material or miscellaneous articles – Coated or structually defined flake – particle – cell – strand,... – Staple length fiber
Patent
1996-02-07
1998-02-17
Dixon, Merrick
Stock material or miscellaneous articles
Coated or structually defined flake, particle, cell, strand,...
Staple length fiber
428292, 428224, 428296, 428362, 428374, 428370, 156167, 1563082, D02G 300
Patent
active
057189722
ABSTRACT:
The present invention provides a nonwoven fabric made of fine denier filaments of superior bulkiness, heat insulation property and tensile strength, and a production method thereof. This nonwoven fabric is made of fine denier filaments produced by first preparing. First a thermoplastic polymer component "A", then another thermoplastic polymer component "B" which is insoluble in the component "A" and of which the melting point is higher than that of the component "A" by 30.degree. to 180.degree. C. Adopting a bicomponent melt spinning method employing the component "A" and the component "B", the bicomponent conjugate filaments, on which surface at least component "A" is exposed, are obtained. By accumulating these bicomponent conjugate filaments, a web is formed. Then heat is applied to the predetermined areas on the web throughout its entire thickness, whereby only the component A is softened or molten, and the bicomponent conjugate filaments are heat bonded to one another, thus a fleece is obtained. The predetermined areas are shaped like dots or lattices and distributed with a certain space between them. After obtaining the fleece, a wrinkling action is applied to the fleece.
REFERENCES:
patent: 4189338 (1980-02-01), Ejima et al.
patent: 4269888 (1981-05-01), Ejima et al.
patent: 4737404 (1988-04-01), Jackson
patent: 5009951 (1991-04-01), Ohmae et al.
Kubo Eiichi
Miyahara Yoshiki
Murase Shigemitsu
Nagaoka Koichi
Dixon Merrick
Unitika Ltd.
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