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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One of our customers has been using UPE (Unsaturated Polyester Resin) to make tent pole with glass roving (mainly E-glass) amount 2000mt in a year.