| 摘要 |
The whole aromatic polyamide fiber is produced by dissolving a whole aromatic polyamide in a N,N'-dimethyl acetamide (A) solvent to obtain a spinning soln. having 15-25 wt.% polymer content and 1.4-2.5 intrinsic viscosity delivering the soln. into the spinning box to form a fiber and then to remove the solvent, removing the residual solvent by spraying a soln. mixed with 10-50 wt.% (A), drawing the fiber at 60-120 deg.C, water-cleaning it at 30-70 deg.C, drying it at 100-200 deg.C, heat-treating it at 250-400 deg.C, and crimping it. The polyamide fiber has a good heat-resistance and fire-retardancy.
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