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    • 2. 发明公开
    • POLYPROPYLENE FIBRES SUITABLE FOR SPUNBONDED NON-WOVEN FABRICS
    • 聚丙烯纤维热凝spunbondeds生产
    • EP1543185A1
    • 2005-06-22
    • EP03753461.7
    • 2003-09-23
    • Basell Poliolefine Italia S.P.A.
    • SARTORI, FrancoLONARDO, AngeloHERBEN, Pierre
    • D01F6/46D04H3/14C08L23/10
    • D04H3/16C08L23/142C08L2203/12C08L2205/02D01F6/46Y10T428/2913C08L2666/06
    • A fibre for spunbonded fabrics comprising a propylene polymer composition (A) having an MFR (1) value from 6 to 150 g/10 min and being selected from (i) a crystalline propylene random copolymer or crystalline propylene polymer composition containing at least 0.8% by weight of ethylene and having a melting temperature of 153° C or higher, a content of fraction soluble in xylene at room temperature lower than 10% by weight, and a value of the ratio of the polymer fraction collected at the temperature range from 25° to 95° C to the xylene soluble fraction at room temperature higher than 4; and (ii) a crystalline propylene polymer composition having a melting temperature of 153° C or higher, a content of fraction soluble in xylene at room temperature lower than 10% by weight; the said composition containing at least 0.64 wt% of ethylene or a C4-C10 a-olefin recurring unit and comprising: (1) 20-80 wt% of a crystalline propylene polymer containing up to 1.5 wt% of ethylene and/or C4-C10 a-olefin; and (II) 20-80 wt% of a crystalline propylene random copolymer selected from (IIa) a copolymer of propylene with 0.8 to 10 wt% of ethylene and/or (IIb) a copolymer of propylene with 1.5 to 18 wt% of a C4-CIO a-olefin. Said polymer composition (A) is obtainable by way of chemical degradation of a precursor polymer composition (A) having MFR values (MFR (2)) of from 0.5 to 50 g/10 min, provided that the ratio of MFR (1) to MFR (2) be from 1.5 to 60. Propylene polymer composition (ii) as described above and non-woven fabrics that are prepared with the said fibres. The said fabric is useful for coverstock and diapers.
    • 3. 发明公开
    • POLYPROPYLENE FIBRES SUITABLE FOR THERMALLY BONDED NON-WOVEN FABRICS
    • 聚丙烯纤维热粘合的非织造的制造
    • EP1543186A1
    • 2005-06-22
    • EP03769326.4
    • 2003-09-23
    • Basell Poliolefine Italia S.P.A.
    • SARTORI, FrancoSARTORI, Gabriella
    • D01F6/46D04H1/54C08L23/10
    • D04H3/14C08L23/14C08L23/142C08L2203/12C08L2205/02C08L2205/03D01F6/46D04H1/54D04H1/60Y10T428/2931C08L2666/06
    • 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 C4-C10 α-olefins and having a melting temperature of 155° 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° to 95° 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° 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 C4-C10 α-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 C4-C10 α-olefin and (II) 20-80 wt% of a crystalline random copolymer of propylene with ethylene or a C4-C10 α-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 C4-C10 α-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.