发明授权
US3995420A Highly elastic synthetic crimp yarn with low residual latent crimp and process for producing said yarn 失效
具有低残留潜伏性的高弹性合成卷曲纱和用于生产所述纱线的方法

Highly elastic synthetic crimp yarn with low residual latent crimp and
process for producing said yarn
摘要:
The invention relates to a process for the production of a false-twist textured, highly elastic, synthetic crimp yarn with low residual shrinkage and latently bound crimp by stretching, false-twisting, heat-fixing and thermal after-treatment of the synthetic yarn at yarn draw-off rates of from 400 to 900 m/min, in which the thread tension during thermal after-treatment is 6-25% of the thread tension during heat-fixing, the time of thermal after-treatment is 2-5% of the time spent in heat-fixing and the temperature of the yarn during the thermal after-treatment is 30.degree.-100.degree. C.
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