| 摘要 |
A manufacturing method of a para-aramid fiber is provided to spin the PPTA(Poly-Phenylene Terephthalamid) spinning dope by an air gap and thereafter to use the PVP(PolyVinyl Pyrrolidone) solution as a solidification bath. Poly para vinyl terephthalate polymer is dissolved into the sulfuric acid so that a spinning dope is manufactured. Thereafter, the spinning dope is spun by means of the air gap wet spinning method and solidified in the polyvinyl pyrrolidone aqueous solution so that the poly vinyl pyrrolidone is adsorbed to the para aramid fiber. The molecular weight of the polyvinyl pyrrolidone is 10,000 to 200,000. The concentration in the polyvinyl pyrrolidone aqueous solution is 5 to 10 wt%. In the manufactured fiber, the PTTA with concentration of 19.5% is dissolved into the sulfuric acid of above 101.1% at the temperature of 85 degrees centigrade. The proper molecular weight of the polyvinyl pyrrolidone is 55,000.
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