The introduced machine china is a needed line to the knitting clothing product, According to raw materials, there are three main categories to the natural fiber introduced to machine china, the synthetic fiber introduced to machine china and the hybrid machine china. With the development of the polyester industry, the introduced machine china made an increasing number of pure polyester fiber as its raw material. Polyester fiber is a kind of high quality synthetic fiber, used to make high strength suture, in all kinds of suture, second only to nylon, and will not reduce the strength when wet. Its shrinkage rate is very small, after appropriate shaping shrinkage is less than 1%, so sewing stitches can always keep flat pretty, no shrinkage. Wear resistance is second only to nylon. Low moisture regain, good high temperature resistance, low temperature resistance, light resistance and water resistance. Therefore, the polyester line was used extremely extensively to the variety and on many occasions, replaced the cotton to machine china. The polyester line is made a broad use, this could be used to make clothing sewing to a cotton fabric, a chemical fiber fabric and a blended fabric, as well as to sew a knitted coat. Special polyester line or shoe hat leather industry with excellent line. Polyester wrapping wire can be used for fertilizer bags, cement bags, flour bags, feed bags, all kinds of woven bags, thread for sole, inner wrapping wire for water pipe, etc.

Strength The strength of cotton material mainly depends on the length and twisting number of cotton fiber. The longer the fiber length, the greater the twisting number and the greater the strength, the better the fastness and wear resistance of woven products. The strength of cotton material is better than that of man-made fiber, but worse than that of other fibers. The elasticity of elastic cotton fiber is poor, so the cotton lining crumples easily. Hygroscopic cotton fiber is porous material, the molecule contains a large hydrophilic structure, so the hygroscopic property is good, the air permeability is also good, and the material made of it is soft and comfortable. Warm cotton fiber is a bad conductor of tears, the inner cavity of cotton fiber is full of air not flowing, therefore, cotton material in the heat preservation is good, good performance. The dyeing cotton lining material has good dyeing performance, bright color and complete chromatography, which can match with various kinds of fabrics. Other properties Cotton lining material alkali resistance, acid resistance is poor, heat resistance and light resistance are good.

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