A kind of method directly preparing ultra high molecular weight polyethylene fiber

A kind of method directly preparing ultra high molecular weight polyethylene fiber

  • CN 104,846,451 B
  • Filed: 06/09/2015
  • Issued: 03/22/2019
  • Est. Priority Date: 06/09/2015
  • Status: Active Grant
First Claim
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1. a kind of method for directly preparing ultra high molecular weight polyethylene fiber, which is characterized in that do not add any change superelevation pointThe auxiliary agent of the melt fluidity of sub- weight polyethylene fiber, sequentially includes the following steps:

  • It (1) is that raw material is added to melting extrusion in double screw extruder and comes into being by the polyethylene that number-average molecular weight is 230-350 ten thousandFiber;

    The draw ratio of double screw extruder is 1;

    40, and screw zones temperature is 150-250 DEG C, and the extruded velocity of screw rod is 200-250r/min, spinneret are the hole 120-150, and diameter 0.4-0.9mm, the temperature of spinneret melt is 160-320 DEG C, spouting velocityFor 2-5m/s;

    (2) as-spun fibre for squeezing out step (1) is cooling by cooling trough;

    (3) step (2) cooling fiber is subjected to super drawing twice by hot water bath cabinet;

    The bath temperature of hot water bath cabinet is80-95 DEG C, draw ratio is 25-40 times;

    (4) after stretching the fiber of step (3) super drawing using hot wind low power twice, finished fiber is obtained;

    The temperature of hot windDegree is 120-145 DEG C, and draw ratio is 2-5 times.

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