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    • 4. 发明授权
    • Melt blown fiber
    • 熔喷纤维
    • US08999867B2
    • 2015-04-07
    • US13575469
    • 2011-01-19
    • Henk Van ParidonBert BroedersWilhelmus henricus Adolf SarsJoachim FiebigNina Ackermans
    • Henk Van ParidonBert BroedersWilhelmus henricus Adolf SarsJoachim FiebigNina Ackermans
    • D04H1/56D04H3/00D02G3/00D01D5/08D01F6/30D01D5/098D04H3/007D04H3/16C08F210/06
    • D01F6/30C08F210/06D01D5/0985D04H1/56D04H3/007D04H3/16Y10T428/298Y10T442/626Y10T442/68C08F210/16C08F2500/12
    • Melt-blown fiber having an average diameter of not more than 5.0 μm, said fiber comprises at least 85 wt.-% of a propylene copolymer, wherein •said melt blown fiber and/or said propylene copolymer has/have a melt flow rate MFR2 (230° C.) measured according to ISO 1133 of at least 200 g/10 min, •said propylene copolymer has a comonomer content of 0.5 to 5.5 wt.-%, the comonmers are ethylene and/or at least one C4 to C20 α-olefin selected from the group consisting of 1-butene, 1-pentene, 1-hexene, 1-heptene, and 1-octene, •the propylene copolymer has regiodefects of not more than 0.4 mol.-% determined by 13C-spectroscopy, and •said melt blown fiber and/or said propylene copolymer fulfill(s) the equation (1). wherein Tm [° C.] is the melting temperature [given in ° C.] of melt blown fiber said and/or of said propylene copolymer measured according to ISO 11357-3, C2 [wt %] is the amount [given in weight percentage] of comonomers within said melt blown fiber and/or within said propylene copolymer determined with Fourier transform infrared spectroscopy (FTIR). Tm ⁡ [ ° ⁢ ⁢ C . ] [ ° ⁢ ⁢ C . ] ≥ 160 - C ⁢ ⁢ 2 ⁡ [ wt ⁢ ⁢ % ] × 5.25 [ wt ⁢ ⁢ % ] ( 1 )
    • 平均直径不超过5.0μm的熔喷纤维,所述纤维包括至少85重量%的丙烯共聚物,其中所述熔喷纤维和/或所述丙烯共聚物具有/具有熔体流动速率MFR 2 (230℃)根据ISO 1133测量为至少200g / 10min,•所述丙烯共聚物的共聚单体含量为0.5-5.5wt%,共聚单体为乙烯和/或至少一个C 4至C 20 选自1-丁烯,1-戊烯,1-己烯,1-庚烯和1-辛烯的α-烯烃,•丙烯共聚物具有不超过0.4摩尔%的<2,1>区域, 通过13 C-光谱测定,和·所述熔喷纤维和/或所述丙烯共聚物满足等式(1)。 其中Tm [℃]是根据ISO 11357-3测量的熔喷纤维的所述和/或所述丙烯共聚物的熔融温度[以℃表示],[重量%]是[以重量计 所述熔喷纤维中的共聚单体和/或在用傅立叶变换红外光谱法(FTIR)测定的所述丙烯共聚物内)的共聚单体。 Tm⁡[°УC。 ] ]≥160-C⁢2⁡[wt⁢%]×5.25 [wt⁢%](1)