This paper introduces the key step of fully shrinking for suitable elasticity in cheese dyeing of PTT filament core-spun elastic yarn and staple blended yarn.

通过分析，认为PTT弹性长丝包芯纱线及短纤维混纺纱线的筒子染色关键，是使其充分收缩，以达到适宜弹性；

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This paper introduces the PID control over the dyeing process. A step wise control method of improving PID parameters is also stated.

分析了染色工艺过程的PID控制算法，提出一种分段改进PID参数的控制方法。

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