Polypropylene fiber spinning project has more than 10 independently-developed patents, and the invention of rotor-spun roving has supply a gap in China.
丙纶纺纱项目拥有自主研发的10多项专利，转杯纺高粗纱填补国内空白。
This article relates how to select fixed-quantity and twist in the technology parameters of roving, and back draft in the technology parameters of spun yarn.
阐述了粗纱工艺参数中定量、粗纱捻系数以及细纱后牵伸的选择。
Relation among feeding roving gauge, twist factor and yarn property were researched, property of polyacrylonitrile preliminary heat treatment in oxidizing polyester filament core-spun yarn was tested.
研究了喂入粗纱间距、捻系数与成纱性能的关系，测试分析了聚丙烯腈预氧化纤维涤纶长丝包芯纱的性能。
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