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    • 1. 发明授权
    • Metallocene catalyzed propylene-&agr;-olefin random copolymer melt spun fibers
    • 茂金属催化的丙烯-α-烯烃无规共聚物熔纺纤维
    • US06476172B1
    • 2002-11-05
    • US09916476
    • 2001-07-27
    • Darek WachowiczCyril ChevillardLisa K. Albe
    • Darek WachowiczCyril ChevillardLisa K. Albe
    • C08F21006
    • D01F6/30C08F210/06C08F210/16Y10T428/2913C08F2500/20C08F2500/03
    • A fiber product drawn from an isotactic propylene copolymer of a C2, C4, C5, C6, C7 or C8 &agr;-olefin monomer produced in the presence of a metallocene catalyst characterized by a bridged chiral and stereorigid cyclopentadienyl or substituted cyclopentadienyl ligand structure of a transitional metal selected from group 4b, 5b, or 6b metals of the Periodic Table of Elements, the copolymer having a MFR less than 35, suitably about 30 or less. The copolymer is heated to a molten state and extruded to form a fiber preform. The preform is subjected to spinning at a spinning speed of at least 300 meters per minutes and subsequent drawing at a speed of up to about 1500 meters per minute to provide a draw ratio of at least 1.5 up to 5:1 to produce a continuous fiber having high tenacity of about 3.5 grams per denier and greater and good hand.
    • 在由金属茂催化剂存在下产生的C2,C4,C5,C6,C7或C8-α-烯烃单体的全同立构丙烯共聚物拉伸的纤维产物,其特征在于桥联的手性和立体刚性环戊二烯基或取代的环戊二烯基配体结构的过渡 选自元素周期表第4b,5b或6b族金属的金属,该共聚物的MFR小于35,合适地为约30或更小。 将共聚物加热至熔融状态并挤出以形成纤维预制件。 以每分钟至少300米的纺丝速度进行纺丝,随后以高达约1500米/分钟的速度拉伸,以提供至少1.5至5:1的拉伸比,以产生连续纤维 具有约3.5克/旦的高韧性和较好的手。