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Abstract

A fibre for thermal bonding comprising a propylene polymer composition having an MFR value from 4 to 50 g/10 min. The said composition is selected from (i) a crystalline propylene random copolymer or polymer composition containing at least 0.8% by weight of ethylene and optionally one or more C.sub.4-C.sub.10 .alpha.-olefins and having a melting temperature of 155.degree. C. or higher, a content of fraction soluble in xylene at room temperature lower than 5 wt %, a value of the ratio of the polymer fraction collected at the temperature range from 25.degree. to 95.degree. C. by TREF with xylene to the xylene soluble fraction, higher than 8; and (ii) a crystalline propylene polymer composition having a melting temperature of 153.degree. C. or higher, a content of fraction soluble in xylene at room temperature lower than 10 wt % and containing at least 0.64 wt % of ethylene and/or C.sub.4-C.sub.10 .alpha.-olefin recurring unit and comprising (I) 20-80 wt % of a crystalline propylene homopolymer and/or crystalline propylene random copolymer containing up to 1.5% by weight of ethylene and/or C.sub.4-C.sub.10 .alpha.-olefin and (II) 20-80 wt % of a crystalline random copolymer of propylene with ethylene or a C.sub.4-C.sub.10 .alpha.-olefin. A polymer composition having an MFR value from 4 to 50 g/10 min, an ethylene content of at least 0.64 wt % and comprising (A) 20-80 wt % of a crystalline propylene homopolymer or crystalline propylene random copolymer containing up to 1.5 wt % of ethylene and/or C.sub.4-C.sub.10 .alpha.-olefin and (B) 20-80 wt % of a crystalline random copolymer of propylene with higher than 5 to 9 wt % of ethylene. Non-woven fabrics that are prepared with the said fibres are useful for hygienic applications.

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First Claim