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    • 2. 发明申请
    • POLYPROPYLENE FIBRES SUITABLE FOR SPUNBONDED NON-WOVEN FABRICS
    • 适用于纺织非织造布的聚丙烯纤维
    • WO2004029342A1
    • 2004-04-08
    • PCT/EP2003/010707
    • 2003-09-23
    • BASELL POLIOLEFINE ITALIA S.P.A.SARTORI, FrancoLONARDO, AngeloHERBEN, Pierre
    • SARTORI, FrancoLONARDO, AngeloHERBEN, Pierre
    • D01F6/46
    • 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 C 4 -C 10 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 C 4 -C 10 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.
    • 一种用于纺粘织物的纤维,其包含MFR(1)值为6至150g / 10min的丙烯聚合物组合物(A),并且选自(i)结晶丙烯无规共聚物或结晶丙烯聚合物组合物,其含有至少0.8% 的乙烯,其熔融温度为153℃以上,室温下可溶于二甲苯的馏分的含量低于10重量%,在25℃以下的聚合物馏分的比例值 在95℃以上的二甲苯可溶级分在室温高于4℃; 和(ii)熔融温度为153℃以上的结晶丙烯聚合物组合物,室温下可溶于二甲苯的馏分的含量低于10重量% 所述组合物含有至少0.64重量%的乙烯或C 4 -C 10α-烯烃重复单元,并包含:(1)20-80重量%的结晶丙烯聚合物,其含有至多1.5重量%的乙烯和/或C4- C10α-烯烃; 和(II)20-80重量%的结晶丙烯无规共聚物,其选自(IIa)丙烯与0.8至10重量%乙烯的共聚物和/或(IIb)丙烯与1.5至18重量%的共聚物 C 4 -C 10α-烯烃。 所述聚合物组合物(A)可以通过MFR(MFR(2))为0.5-50g / 10min的前体聚合物组合物(A)的化学降解获得,条件是MFR(1)与 MFR(2)为1.5至60.如上所述的丙烯聚合物组合物(ii)和用所述纤维制备的无纺织物。 所述织物可用于覆盖物和尿布。