A kind of waterproof and breathable synthetic leather and its clean production method

Abstract

The invention belongs to the technical field of synthetic leather, and relates to a waterproof exsiccative breathable synthetic leather and a cleaner production method thereof. The method includes the following steps: (1) immersing a base cloth using a mixed liquid of citric acid and tartaric acid, rolling and drying to obtain a pretreated base cloth; (2) adding a certain amount of fluorine resin emulsion, tea saponin and water-based color paste to the aqueous polyurethane, and preparing a micro foaming slurry by a physical mechanical method; (3) producing the waterproof exsiccative breathable synthetic leather by using a micro foam slurry as a coating agent through a release paper transfer coating method. The method all employs environmentally friendly materials and cleaner production processes to obtain synthetic leather with good waterproof exsiccative and breathable performances, greatly improves the health properties and applications of the synthetic leather, and has good prospects.

Description

technical field [0001] The invention relates to the technical field of synthetic leather, in particular to a waterproof, moisture-discharging and breathable synthetic leather and a clean production method thereof. Background technique [0002] Synthetic leather is a composite material that simulates the structure and performance of natural leather and can be used as a substitute for natural leather. Usually, the non-woven fabric impregnated with high molecular polymer is used as the simulated mesh layer, and the microporous polyurethane layer is used to simulate the grain layer. The front and back of the obtained synthetic leather are very similar to leather, and have certain air permeability Artificial leather is closer to natural leather. Widely used in making shoes, boots, bags and ball games. [0003] At present, as far as the development of synthetic leather technology is concerned, there are two main technical bottlenecks hindering the rapid development of the synthe...

AI Technical Summary

Problems solved by technology

First, the problem of environmental pollution caused by the solvent-based production system. According to rough calculations, the annual demand for solvent-based resins in my country's traditional synthetic leather industry is more than 2 million tons, which means that about 1.5 million tons of toxic substances volatilize every year. Discharged into the air, such a huge amount of exhaust gas will seriously pollute the environment during the manufacturing process and pose a threat to the health of on-site operators, especially the surrounding areas of the synthetic leather factory are seriously affected

Secondly, because organic solvents are generally flammable and explosive, the use of a large number of organic solvents increases the risk factor of synthetic leather enterprises.

Second, the hygienic performance of the product is poor, and there is a big gap compared with natural leather, so it is difficult to meet the actual application requirements