Preparation process of high-physical-property extra-flat cowhide fiber leather base fabric

Abstract

The invention relates to the technical field of leather manufacturing, and discloses a preparation process of a high-physical-property extra-flat cowhide fiber leather base fabric. The preparation process comprises a blending process, a chemical fiber net forming process, a cowhide fiber net forming process and a chemical fiber net and cowhide fiber net laminating and net-forming process; according to the blending process, chemical fibers and cowhide fibers are blended according to the weight ratio of 1:0.8-1:1.2; the chemical fiber net forming process sequentially comprises the steps of opening, carding, lapping, pre-wetting and pre-needling: in the cowhide fiber net forming process, a cowhide fiber raw material is prepared into a cowhide fiber net through air-laying or water-laying; thechemical fibers are mixed fibers of polyester fibers and chinlon fibers, and the chinlon fibers account for 80% or above of the total weight of the mixed fibers; the laminating and net-forming processsequentially comprises the steps of net laminating, spunlace, vacuum drying, drying, trimming, calendering and buffing. According to the preparation process, the physical property of the cowhide fiber leather base fabric is improved, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of leather manufacturing, in particular to a preparation process of a high-physical-property flat bovine leather base cloth. Background technique [0002] Leather is an indispensable category of production and daily necessities in human life, and is widely used in many fields such as clothing, home furnishing, automobiles, and public services. A large number of scraps of natural leather are produced in the production process of leather products, and the amount of scraps of natural leather is large. If it can be used twice, especially processed into cow fiber leather, it will produce Considerable wealth, and at the same time have positive significance for green energy conservation and environmental protection. [0003] The traditional regenerated leather is to crush all kinds of leather and animal skin scraps into powder, and then bond and press the powder into a whole piece of regenerated leather through ad...

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned imitation cow leather bonded with the cow fiber leather base cloth and the polyurethane coating layer generally has disadvantages such as poor physical properties. There is a large difference in strength in each direction; the second is that normal pressure (3-15MPa) is usually used for spunlace reinforcement, and it is not easy to pierce through spunlace, thereby reducing the mechanical properties of the cow fiber leather base cloth; The interlayer bonding strength between fiber leather base cloth and PU film is low; the fourth is that the flatness of the made bovine fiber leather base cloth is not high, and cannot meet the special requirements of the high flatness requirements of the bovine fiber leather base cloth products; the fifth is water Drying after stabbing requires a lot of energy, which consumes a lot of energy and has high production costs

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