Fibers suitable for the production of nonwoven fabrics...

Details Fibers suitable for the production of nonwoven fabrics... Fibers suitable for the production of nonwoven fabrics...

D - Textiles, Paper

01

F

D01F 1/10 (2006.01) D01D 5/08 (2006.01) D01F 6/06 (2006.01) D01F 6/30 (2006.01) D01F 6/46 (2006.01) D04H 1/54 (2006.01) D04H 3/14 (2006.01)

Patent

CA 2126014

ABSTRACT 1) Disclosed is a fiber for nonwoven fabrics having thermowelding strength equal to or higher than 5 N and/or flexibility index greater than 800, comprising a polymer material additivated with organic phosphites and/or phosphonites, HALS, and optionally phenolic antioxidants, said polymer material being selected from: 1) isotactic propylene homopolymers having an isotactic index greater than 90; 2) random copolymers of propylene with ethylene and/or a C4-C8 .alpha.-olefin; and 3) blends of polymers (1) with copolymers (2) or blends of at least one of said homopolymers and copolymers with heterophasic propylene polymers; said fiber being obtained by a spinning process operating with a real or equivalent output hole diameter of less than 0.5 mm and with a hole flow-rate ranging from 0.1 to 0.6 g/minute, at a spinning temperature ranging from 260°C to 320°C, using polymers (1), or (2), or polymer blends (3), having MFR from 5 to 40 g/10 min, and in the absence of a drawing step.

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