Method for producing emulational leather

Abstract

The invention provides a method for producing emulational leather by cold pressing treatment to prepare high emulational synthetic leather, which comprises the following steps that: firstly, preparation of basic fabric: non-woven fabric passes through an impregnation groove containing PU resin, dimethylfomamide and a colorant, is subjected to pre-solidification treatment and coated with a layer of a coating material on the surface of the non-woven fabric; the nonwoven fabric passes through a coagulating tank and a rinsing bath to be subjected to solidification and water washing treatment and dried and shaped to manufacture the basic fabric; the surface of release paper is coated with a layer of a surface material containing the PU resin, dimethylfomamide and the colorant through a No.1 coating head; then a layer of a bottom material is coated on the surface material; the surface material and the bottom material are preheated and compounded with the basic fabric; the mixture is subjected to drying treatment to manufacture a semifinished product; the semifinished product is heated to the temperature of between 160 and 190 DEG C and subjected to embossing treatment through a pair of cold pressing rollers; and after the cold pressing treatment, the semifinished product is cooled and furled to manufacture a finished product.

Description

technical field [0001] The invention relates to a method for producing imitation leather, and the produced leather is used in the fields of leather shoes, leather garments, sofa products and the like. Background technique [0002] The application of imitation leather in clothing, sports shoes, sofas, luggage and other fields is more and more extensive, which largely compensates for the impact of the scarcity of animal skins on related manufacturing industries, but the existing ones are mainly used for sports shoes PU synthetic leather still has deficiencies, mainly in that the semi-finished PU synthetic leather will rebound after cold pressing, so that when the PU synthetic leather roll is left for a period of time, the surface texture gradually fades and becomes blurred. However, when the semi-finished PU synthetic leather is subjected to hot-pressing treatment, since the resin on the surface of the semi-finished PU synthetic leather is not resistant to high temperature, th...

AI Technical Summary

Problems solved by technology

[0002] The application of imitation leather in clothing, sports shoes, sofas, luggage and other fields is more and more extensive, which largely compensates for the impact of the scarcity of animal skins on related manufacturing industries, but the existing ones are mainly used for sports shoes PU synthetic leather still has deficiencies, mainly in that the semi-finished PU synthetic leather will rebound after cold pressing, so that when the PU synthetic leather roll is left for a period of time, the surface texture gradually fades and becomes blurred. However, when the semi-finished PU synthetic leather is subjected to hot-pressing treatment, since the resin on the surface of the semi-finished PU synthetic leather is not resistant to high temperature, the hot-pressing treatment will accelerate the cracking and aging of the resin. This is a dilemma, and thus restricts the simulation. The gap between PU synthetic leather and animal skin in simulation