Blended core-spun yarn of ultra-short kraft fiber, leather base cloth and production method thereof

Abstract

The invention relates to blended core-spun yarn made of ultra-short cowhide fibers, leather base cloth and production methods of the blended core-spun yarn and the leather base cloth. The production method of yarn includes: performing pure physical grinding, rubbing and stripping on cowhide leftovers to obtain the ultra-short cowhide fibers of 2-10mm, reasonably pre-conditioning the cowhide fibers, mixing the cowhide fibers with hot-melt fibers to form a mixed fiber layer, laying a polyester short fiber layer on each of the upper surface and the lower surface of the mixed fiber layer in a non-woven manner, cutting and opening to allow three kinds of fibers to be evenly mixed, carding, cutting and rubbing to obtain roving, combining the roving, and forming the core-spun yarn by using the roving, serving as the covering yarn, and low-flexibility and high-strength polyester filaments through carding friction twisting spinning, wherein the mass percentages of the ultra-short cowhide fibers, the hot-melt fibers and the polyester short fibers accounting for the mixed fibers in the covering yarn are 80-95%, 2-10% and 1-10%. The leather base cloth woven by the core-spun yarn is good in tensile strength and tear strength after hot pressing, and the longitudinal and transverse strength of the leather base cloth is even and stable.

Description

technical field [0001] The invention relates to the technical field of leather spinning, in particular to a blended core-spun yarn of ultra-short kraft fiber, a leather base cloth and a production method thereof. Background technique [0002] With the improvement of modern people's living standards, leather products are deeply loved by consumers for their beauty and durability. Clothes, shoes and hats, furniture, bags, and car decoration materials made of leather all occupy a large share in the market. , the demand for real leather materials at home and abroad is increasing day by day. Real leather materials have good air permeability, water absorption, elasticity, and good hand feeling, but the cost is relatively high, and a large number of scraps are generated in the production process of leather products. The raw materials are not fully recycled. Cowhide scraps are inevitable wastes in the production process of cowhide products, and cowhide is mainly composed of bundle-ty...

AI Technical Summary

Problems solved by technology

[0008] Known according to above-mentioned prior art: adopt chemical method to obtain kraft fiber, although longer fiber can be obtained, because processing method is difficult to meet environmental protection requirement and be strictly limited in actual production; Obtain kraft fiber base cloth by non-woven way, although To a certain extent, the requirements for fiber length are reduced, but the longitudinal and transverse strength of the fabric often cannot meet the requirements of the finished product; the preparation of kraft fiber blended yarn by blending technology can improve the mechanical properties of kraft fiber yarn, but Relevant documents only generally talk about the mixing ratio of bulk fibers, and the description of the technical content of the practice is relatively vague, and the leather raw materials must be soaked in solution, washed with water, etc. before defibrating to produce waste liquid, which is not conducive to environmental protection; through air spinning Yarn technology processes kraft fiber blended yarn, although a kraft fiber blended yarn yarn forming method is provided, but this method has a clear requirement for the length of the kraft fiber length to be between 25-30mm, for 2-10mm Ultra-short kraft fiber is not applicable; most of the kraft fiber obtained by using the existing physical fiber opening and grinding methods is within 2-10mm, the ultra-short kraft fiber cannot meet the requirements of spinning, and the modified fiber is often used in papermaking, web forming and spunlace Composite non-woven kraft fiber paper or leather cloth

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