ratio of drawing

Hollowness of the hollow polyester UDY increased after cool drawing, decreased after heat drawing, and was down a little while increasing drawing ratio.

冷拉伸后，涤纶未拉伸丝的中空度变大，热拉伸则相反；随着拉伸倍数的提高，涤纶未拉伸丝的中空度有所下降。

Influence factors of the Production technology of PBT fiber such as temperature and speed of spinning, condition of quenching, take-uP tension, time of balance, temperature and ratio of drawing, twisting, overfeed ratio and texturing temperature are studied under conventional spinning speeds.

本文研究了在常规纺速下，纺丝速度、纺丝温度、冷却成形、卷绕张力、平衡时间、拉伸温度、拉伸倍数、捻度、超喂率、变形温度等对PBT生产工艺的影响。

The effects of process parameters, such as spinning temperature, filter precision of spin pack, drawing temperature, draw ratio, on fuzz number were discussed for 75 dtex/ 96 f superfine PET FDY.

讨论75dtex/96f涤纶超细FDY纺丝生产中纺丝温度，组件过滤精度，拉伸温度，拉伸倍数等工艺参数对毛羽的影响。

The breaking strength and resilient-elasticity recovery of PTT fabric can be increased under suitable temperature and drawing ratio during heat setting, but its dilatability took worse.

选择适当的温度和拉伸比进行热定形，可提高PTT织物的断裂强力和弹性回复率，但其延伸性变差。

PAN fibers with different drawing ratio and different preoxidation degree were investigated by means of sound velocimeter and X-ray diffraction meter.

采用声速仪及X射线衍射仪对不同牵伸倍数和不同预氧化程度的PAN纤维进行取向度和预氧化程度的测试，并将其结果进行对比。

The result shows that the melt index difference of the two kinds chips will greatly affect the degree of hollowness and spinning stability, and drawing ratio will affect the number of crimps.

结果表明：两种切片的熔融指数差对中空度的影响较大，并影响纺丝的稳定性。

The results showed that the relative molecular weight and its distribution of polypropylene, isotacticity, spinning temperature, quenching speed, draw ratio, drawing godet temperature and oiling amount had evident effect on yarn irregularity.

结果表明，聚丙烯的相对分子质量及其分布、等规度和纺丝温度、冷却吹风速度、拉伸比率、上热盘温度以及上油量等对纤维不匀率产生明显的影响。

The factors affecting the magnetism of magnetic PP fiber were studied, including content of magnetic powder, sheath-core ratio, magnetic powder variety and after-drawing.

研究了磁性聚丙烯（PP）纤维中磁粉含量、纤维的皮芯比、添加的磁粉种类及纤维后拉伸等对纤维的磁性能的影响。

The effects of the jet stretch ratio and draw ratios of three-stage drawing including air drawing, DMF bath drawing, hot water and boiling water drawing and dry-hot drawing on the properties of PAN fiber were studied in dry-jet wet spinning.

研究了干-喷湿纺聚丙烯腈（PAN）初生纤维的喷丝头拉伸比和三级拉伸（空气拉伸、DMF浴拉伸、热水和沸水拉伸、干热拉伸）工艺中各拉伸比对纤维性能的影响。

The dependence of the structure and properties of Cl-PSA fiber on thermal stretching temperature and drawing ratio was observed.

观察芳香含氯聚砜酰胺纤维结构性能对拉伸倍率和温度的依赖性。