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    • 4. 发明申请
    • POLYPROPYLENE SPUNBOND FIBERS
    • 聚丙烯弹性纤维
    • WO2009058477A1
    • 2009-05-07
    • PCT/US2008/075368
    • 2008-09-05
    • EXXONMOBIL CHEMICAL PATENTS INC.FERRY, William, M.RICHESON, Galen, C.
    • FERRY, William, M.RICHESON, Galen, C.
    • D01F6/06D04H3/16
    • D01D5/0023D01D1/065D01D5/08D01F6/06D04H3/16D10B2321/022Y10T442/681
    • Disclosed herein is a spunbond fiber of visbroken polypropylene having an Mw/Mn of from 3.5 to 7.0, an Mz/Mw of from greater than 2.0 and a melt flow rate (230/2.16) of from 50 to 100 dg/min. Also disclosed is a process for producing spunbond fibers comprising melt blending a polypropylene having a melt flow rate (230/2.16) of from 10 to 30 dg/min with a peroxide visbreaker such that the resulting melt flow rate of the visbroken polypropylene is from 50 to 100 dg/min; melt extruding the visbroken polypropylene through a die block such that filaments of the visbroken polypropylene being produced are exposed to a cabin pressure of from 4500 to 7000 Pa; and forming fibers of from less than 6.0 denier. Nonwoven fabrics and multiple-layer structures can be made from the fibers described herein that are useful for filtering and absorption related articles.
    • 本文公开了具有3.5至7.0的Mw / Mn,大于2.0的Mz / Mw和50至100dg / min的熔体流动速率(230 / 2.16)的脱模聚丙烯的纺粘纤维。 还公开了一种生产纺粘纤维的方法,其包括将熔体流动速率(230 / 2.16)为10至30dg / min的聚丙烯与过氧化物破乳剂熔融共混,使得所得的抗坏裂聚丙烯的熔体流动速率为50 至100 dg / min; 通过模块将熔融挤出减枝裂纹的聚丙烯,使得生产的抗坏裂聚丙烯的长丝暴露于4500至7000Pa的客舱压力; 并形成小于6.0旦尼尔的纤维。 无纺织物和多层结构可以由本文所述的纤维制成,其可用于过滤和吸收相关物品。