A kind of manufacturing method of regenerated leather

Abstract

The invention relates to preparation methods of non-woven materials and particularly relates to a preparation method of regenerated leather. The preparation method comprises the following steps: sequentially extracting leather fibers, blending materials, distributing the materials, maintaining slurry, automatically draining water, dynamically pressing and dehydrating, flatly pressing and moulding at high pressure, drying, cutting edges, coiling, carrying out surface-treating, coating or moving a film to prepare a continuous broad product, wherein the fiber extraction step comprises the following steps: smashing leather and extracting fibers and putting the fibers in water and soaking; the material blending step comprises the following step: putting the soaked leather fibers and a chemical assistant in a stirring barrel to be uniformly stirred; the slurry maintaining step comprises the following step that the blended slurry is distributed on a conveyer belt to be fed above a slurry maintaining device to accomplish the polymerization reaction to form a basic form of leather blank slurry; the dynamically pressing and dehydrating step comprises the following step: pressing on the leather blank slurry through a flat pressing disc of a dynamic flat pressing device and squeezing water by means of weight of the flat pressing disc; the step of flat pressing and moulding at high pressure comprises the following step: pressing the leather blank to be moulded by an upper pressure plate of a hydraulic press which descends. The preparation method provided by the invention adopts a simple process flow, is low in cost, high in production efficiency, good in product quality, and wide in application range and has energy-saving and environment-friendly effects.

Description

technical field [0001] The invention relates to a manufacturing method of a non-woven material, which uses leather waste to manufacture continuous wide-width regenerated leather, in particular to a manufacturing method of regenerated leather. Background technique [0002] At present, most of the manufacturing methods of regenerated leather are to use waste scraps from tanneries and leather product factories, adopt wet manufacturing process, and use fourdrinier machines for continuous or semi-continuous production. The dehydration method in production mostly adopts rolling dehydration or vacuum pump water absorption dehydration. Whether it is rolling dehydration or vacuum water absorption, the fibers in the leather blank will be displaced, destroying the initial bonding structure of the fibers, making the leather blank loose, serious affect the physical properties of the finished product. Vacuum water absorption absorbs the moisture in the leather blank, and also inevitably ...

AI Technical Summary

Problems solved by technology

The dehydration method in production mostly adopts roller press dehydration or vacuum pump water absorption dehydration. Whether it is roller press dehydration or vacuum water absorption, the fibers in the leather blank will be displaced, destroying the initial bonding structure of the fibers, making the leather blank loose, serious Affects the physical properties of the finished product

Vacuum water absorption will inevitably absorb part of the fibers and active ingredients while absorbing the moisture in the leather blank. The water cannot be recycled, and the discharged sewage will cause serious pollution to the environment; roll forming or cutting is often used in pressing forming. Concentrated flat pressing after forming, roll forming is easy to cause the fibers in the leather blank to shift, which cannot guarantee the quality of the finished product, and centralized flat pressing after cutting can not realize continuous production on the leather blank manufacturing line, which is labor-intensive and time-consuming. low efficiency