捻度是一个汉语词语，读音是niǎn dù，是指绳线强度的每英寸线所绕的圈数。在单位长度的纱中，纤维所捻成的回旋数，纱的强度主要由捻度决定，一般捻度大强度也大。
vt. twist
misc. twist of yarn ; degree of twist
Due to the twisting force moment that existing in two fibre strands of SIRO spinning. So small amount of twist was produced that the st ructure of strands likes ply yarn was formed.
指出 赛络纺两股须条上产生少量捻度是由于其上有扭矩存在，形成了纱条类似股线的结构。
参考来源 - SIRO纺纱的机理及其产品开发 The Spinning Principle and the Product Development of SIRO Spinning·2,447,543篇论文数据，部分数据来源于NoteExpress
高强度的纱线要求有相当大的捻度，但是超过最佳捻度后，附加的捻度会使纱线扭结，最终降低纱线的强力。
Strong yarns require considerable twist. However, beyond an optimum point additional twist will cause yarns to kink and finally to lose strength.
长丝比短纤维需要的捻度少。
Filament yarns generally require less twist than do staple yarns.
纱线毛羽与捻度不匀严重影响织物质量。
Yarn hairiness and twist unevenness affect fabric quality seriously.
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