发明名称 |
Process for producing acrylic fibers with excellent surface smoothness |
摘要 |
The present invention provides a process for producing acrylic fibers having excellent surface smoothness and a color development ratio not less than 105%, without generating numerous wrinkles peculiar to wet spinning. The process comprises wet-spinning an acrylonitrile polymer spinning solution of from 50 DEG to 70 DEG C. having a viscosity of from 40 to 200 poises at 30 DEG C., (a) with a spinning draft of from 0.05 to 0.2 in the case wherein the spinnerette orifice capillary length is 0.5 mm or less, and (b) with a spinning draft of from 0.13 to 2.0 in the case where the spinnerette orifice capillary length exceeds 0.5 mm; coagulating and water-washing the resulting fibers substantially without stretching; and thereafter wet-heat-stretching the fibers not less than 4 times in length at a temperature not lower than 80 DEG C.
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申请公布号 |
US4448740(A) |
申请公布日期 |
1984.05.15 |
申请号 |
US19830456292 |
申请日期 |
1983.01.06 |
申请人 |
JAPAN EXLAN COMPANY LIMITED |
发明人 |
SAWANISHI, SHIGERU;SHIOMI, YOZO;YAMANE, AKIRA |
分类号 |
D01D5/06;D01D5/253;D01F6/18;D01F6/38;(IPC1-7):D01F6/18 |
主分类号 |
D01D5/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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