length draft ratio 长度吃水比
spinneret draft ratio 喷丝头拉伸比
fore-and-aft draft ratio 首尾吃水比
draft-length ratio 吃水船长比
draft-depth ratio 吃水型深比
draft depth ratio 吃水型深比
This study puts forward a new kind of technology to produce such high performance PTFE yarns. Influences of draft ratio,twist factor,film thickness on the PTFE yarn quality were investigated in this work first of all.
本课题提出一种新型的PTFE膜裂成纱工艺,首先研究了PTFE裂膜成纱时的牵伸倍数、捻系数、薄膜厚度等工艺参数的单一因素的变化对纱线质量的影响。
参考来源 - 聚四氟乙烯膜裂成纱工艺及其性能研究·2,447,543篇论文数据，部分数据来源于NoteExpress
The results show that the apparent density of hard elastic polypropylene increases with a lower melt temperature, or a higher draft ratio, or a higher air blasting speed.
结果表明，熔体温度下降、所受拉伸比增加或冷却风速度升高均可使表观密度增加。
The results show that the maximum porosity of the membrane with distributing uniformly pore diameter are increased with the lowering spinning temperature, and increasing melt draft ratio.
结果表明，聚丙烯熔体的温度较低、所受拉伸比较大，所形成的微孔膜孔径分布均匀、孔隙率较高。
The effects of rotor speed, draft ratio and twist factor on the properties of elastic rotor-spun yarns were investigated, and the technology optimizing was done through the orthogonal test.
分析了转杯速度、牵伸倍数、捻系数对弹性转杯纱性能的影响，并通过正交试验对工艺参数进行了优化。
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