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The Yarn Twist


Twisting is spinning one twist is an important indicator for measuring yarn properties, generally with a twist. Twist is the yarn twist number per unit length (that is, spin turn). Vary with the type of yarn and value per unit length is different, its units of measurement can be expressed as "twisted/10cm" or "twist/m", the first for cotton and cotton fiber yarns, worsted yarns and filament yarn which is used to twist measurement. Twist of yarn strength, softness, elasticity, shrinkage, and so on. With the increase of twist in yarns, its strength was increased, but the twist not exceeding a certain value, or its strong decrease, this value is called a critical twist of the yarn. Different raw yarn, its critical twist is not the same. The yarn softness, elasticity, shrinkage of size is also closely related to twist. Generally, to meet the strength requirements of the premise, twist the smaller the better, because the increase will make the texture of the yarn twist harden, elasticity, shrinkage rate increases, this is the filament yarns generally try not to twist or twisted because of less. In addition, the twist of the yarn weight and diameter also affects the increased tightness of yarn twisting action. In a certain range, volumetric weight increases with the twist of the yarn, yarn diameter decreases with increasing twist, so that the fabric cover and comfort to change.

All in all, twist should be selected according to the different uses of fabric. Warp need to have high strength, twist should be larger; weft and Knitting yarn to be soft, twist should be smaller; woven and knitted pile fabrics, yarn, twist should be smaller in order to fleece; thin crisp crepe fabric, requires a smooth, quite, cool features, twist of the yarn should be larger.