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    • 8. 发明授权
    • Chip-free staple fiber process
    • 无芯片短纤维工艺
    • US4362682A
    • 1982-12-07
    • US179583
    • 1980-08-21
    • Gerald A. BergHermann BuchertSteve R. DuffyRichard E. HarderE. R. HiggsLouis D. HoblitJames R. RyffelWalter P. SmithEdwin L. Stenzel
    • Gerald A. BergHermann BuchertSteve R. DuffyRichard E. HarderE. R. HiggsLouis D. HoblitJames R. RyffelWalter P. SmithEdwin L. Stenzel
    • D01C1/04D01D4/02D01D5/092D01F6/60D01G1/00D01D9/10
    • D01D5/092D01F6/60
    • An equilibrium melt from a standard hydrolytic or anionic polymerization of caprolactam is spun at a temperature between about 230.degree. and 270.degree. C. through a spinnerette, preferably one having a multiplicity of holes spaced from each other in an asymmetric arrangement, the spinning take-away speed being less than about 250 meters/minute. The molten strands of polycaprolactam are quenched in two phases: (1) gas at a temperature of less than 20.degree. C. is directed from a first entrance in a crosscurrent flow upon the face of the spinnerette and upon the molten polycaprolactam strands immediately adjacent thereto, and is exhausted adjacent to the back of the spinnerette; and (2) gas at a temperature of less than 20.degree. C. is directed in a countercurrent flow from a second entrance downstream from the first entrance with respect to the direction of movement of the polycaprolactam strands; whereby the surface temperature of the polycaprolactam strands is reduced to 30.degree.-70.degree. C. A drawing and crimping lubricant and antistatic agent is then applied to the surface of the polycaprolactam strands, which are then drawn at a total draw ratio between 3 and 5. The polycaprolactam strands are then crimped and cut into staple lengths, which are subsequently washed in multiple stages, dried, and packaged for subsequent use or sale.
    • 来自己内酰胺的标准水解或阴离子聚合的平衡熔体在约230℃至270℃的温度下通过纺丝板纺丝,优选为具有以不对称布置彼此间隔开的多个孔的纺丝纱, 远离速度小于约250米/分钟。 聚己内酰胺的熔融线股分两个阶段骤冷:(1)温度低于20℃的气体以旋流流动的第一入口从喷丝板的表面和直接相邻的熔融聚己内酰胺链 并且在喷丝板的背面附近被耗尽; 和(2)温度低于20℃的气体相对于聚己内酰胺束的运动方向以来自第一入口下游的第二入口的逆流流动; 从而将聚己内酰胺股线的表面温度降低至30°-70℃。然后将拉伸和卷曲润滑剂和抗静电剂施加到聚己内酰胺股线的表面上,然后以总拉伸比3至5 然后将聚己内酰胺股线卷曲并切割成短纤维,随后将其洗涤多个阶段,干燥并包装以备后续使用或销售。