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US 5,514,751 AGranted
Polymeric composition for soft polypropylene fibers, fibers obtained from this composition and manufactured articles derived from these fibers
AssigneeMoplefan S.p.A.
InventorGiampiero Barsotti
Life of this patent
Estimating the term…
Abstract
A polymeric composition particularly suitable for obtaining heat sealable soft polypropylene fibers comprises a propylene homopolymer modified with a propylene homopolymer having an isotacticity index higher than 80, an ethylene-propylene copolymer insoluble in xylene at 23.degree. C. and a propylene copolymer soluble in xylene at 23.degree. C.
Claims7
Heat sealable polypropylene fibers for non-woven fabrics made from a composition comprising a propylene homopolymer and a modifying heterophasic polymeric composition, said modifying heterophasic composition comprising:
- (a) from 10 to 60% by weight of a propylene polymer having an isotacticity index, expressed as the percentage by weight that is insoluble in boiling n-heptane, higher than 80,
- (b) from 3 to 25% by weight of an ethylenepropylene copolymer having a propylene content between 0.5 and 5% by weight, said ethylene-propylene copolymer being insoluble in xylene at 23.degree. C., and
- (c) from 15 to 87% by weight of a propylene copolymer, said propylene copolymer being soluble in xylene at 23.degree. C., said modifying heterophasic polymeric composition constituting less than 20% by weight of the total weight of said polymeric composition.
Dependencies are inferred from the claim text.