The tensile strength of hand-knitted yarn is strong when it is used. And it is mainly indicated by the tension fracture load of the yarn. The elongation of the wool yarn and knitting wool of the hand-knitted yarn elongated after being snapped is called as extension. The strength of the yarn is closely related to the fastness and production efficiency of the fabric.
The strength is the base of the strength and elongation of the hand-knitted yarn. The strength and elongation of the full wool yarn or knitting wool is the important index of quality. The strength and elongation directly affects its quality, so the appropriate strength and elongation is required. If it is too larger, it will make the wool yarn and knitting wool slack and the strength is reduced. And if the strength and elongation is too small, the strength will increase while the wool yarn and knitting wool will be stiff.
The strength and elongation of the wool yarn and knitting wool of the hand-knitted yarn is different according to the raw materials, processing stage and fibre alignment condition. The quality of raw materials is good, and the fibre will be arrayed in good order. The appropriate twisting can make the strength of the wool yarn and knitting wool higher and the magnetostriction better.
The performance index of single yarn tensile strength of hand-knitted yarn is one of the main basis for evaluation of yarn grade. In the operation process of, it has important significance for yarn production, technology development and process adjustment, weaving technology and production efficiency. The indexes of yarn tensile properties mainly include average fracture strength, average break elongation, fracture strength variation coefficient, fracture elongation variation coefficient, average fracture time and so on.
In some special occasions, the hand-knitted yarn also needs the fracture work, breaking off strength, initial modulus and other indicators. The minimum strength, minimum elongation and other weak ring indexes in tensile properties can be used as the reference index of the back-end production ( weaving ).
Wuxi tiantianrun textile&technology co.,ltd
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