包覆纱的断裂强力在一定范围内是随包覆度增加而增加的，但当包覆度达到一定程度时成纱强力就明显开始下降。
Breaking strength of wrapped yarn is increasing by covering degree in some range, while the covering degree is over the limit, yarn strength is reduced evidently.
并通过与包缠纱织物和并捻纱织物的性能对比，得出差捻包缠纱织物的优势所在，指出差捻包缠纱织物在精纺领域应用是完全可行的。
By comparing with wrapped yarn fabric and doubling twist yarn fabric, the conclusion that the application of differential twist wrapped yarn fabric to worsted spinning is practicable was acquired.
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。
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.
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