Aqueous PU (Poly Urethane) synthetic leather and manufacture method thereof

Abstract

The invention relates to an aqueous PU (Poly Urethane) synthetic leather and a manufacture method thereof. The aqueous PU synthetic leather comprises a base cloth layer, wherein the base cloth layer is coated with an aqueous PU foaming layer. The manufacture method for the aqueous PU synthetic leather comprises the following steps: preparing slurry, and putting the slurry into a foaming machine; regulating the ratio of the slurry and air inflow to determine the size of a required bubble hole; adding the base cloth; and finishing processing the aqueous PU synthetic leather by the working procedures of heating, ironing, loading, sending into an oven. The synthetic leather manufactured with the manufacture method has the advantages of good air permeability, excellent extraction resistance, yellowing resistance, ultraviolet radiation resistance, ageing resistance, mildewing resistance, hydrolysis resistance, cold and bending resistance, high abrasive resistance, simple and clear manufacture technology and obvious energy-saving and consumption reduction effect, and the fire resistance reaches the international advanced standard.

Description

technical field [0001] The invention relates to a synthetic leather and a manufacturing method thereof, in particular to a water-based PU synthetic leather and a manufacturing method thereof. Background technique [0002] At present, synthetic leather products have gradually become a popular trend in the future. Synthetic leather has been widely used in the production of luggage, clothing, footwear, car interiors and other products. In the manufacturing process of known artificial synthetic leather, no matter base material or the manufacture of face skin all used a large amount of solvents, and it can cause serious environmental pollution, contains dimethylformamide (being called for short DMF) as in the solvent used in wet synthetic leather, can Absorption through the skin or inhalation through the lungs can cause poisoning. It is a listed toxic chemical. According to regulations, the factory must be equipped with equipment for gas collection, water washing and waste gas tr...

AI Technical Summary

Problems solved by technology

In the manufacturing process of known artificial synthetic leather, no matter base material or the manufacture of face skin all used a large amount of solvents, and it can cause serious environmental pollution, contains dimethylformamide (being called for short DMF) as in the solvent used in wet synthetic leather, can Absorption through the skin or inhalation through the lungs can cause poisoning. It is a listed toxic chemical. According to regulations, the factory must be equipped with equipment for gas collection, water washing and waste gas treatment. The factory and the government must also monitor and record the treatment process at any time. Therefore, the treatment of waste water and waste gas is time-consuming and laborious, and a little carelessness will cause serious pollution consequences

[0003] Another dry synthetic leather manufacturing process is the use of resin coating method, which uses methyl ethyl ketone (referred to as MEK) can cause acute toxic hepatitis in the human body, and xylene is highly flammable and can be easily burned by heat, sparks, etc. , the flame is ignited, it is easy to cause a fire, and it will pollute the air and water.