PU (polyurethane) coated skin and preparation method thereof

Abstract

A PU (polyurethane) coated skin comprises surface skin and inner skin, wherein the surface skin is prepared from an aliphatic diisocyanate component a1 and a polyalcohol composite material b1 through a reaction, and the inner skin is prepared from an aromatic isocyanate a2 and a polyalcohol composite material b2 through a reaction. A preparation method of the PU coated skin comprises following steps: A), the aliphatic diisocyanate component a1 and the polyalcohol composite material b1 are sprayed to a heated mold and subjected to the reaction, and the surface skin is formed; B), the aromatic isocyanate a2 and the polyalcohol composite material b2 are sprayed to the surface skin and subjected to a reaction, and the inner skin is formed. The skin prepared with the method has the advantages of having clear texture, touching comfortable, being resistant to light aging and scraping, containing low VOC (volatile organic compounds) and containing no forbidden heavy metal ions, has good physical properties and economic performance, and is particularly suitable for being used as the material for surface coatings of interior dashboards and auxiliary dashboards of automobiles and motorcycles, surface coatings of armrests and glove boxes, seat covers and the like.

Description

technical field [0001] The invention relates to chemical products, in particular to a polyurethane spray-coated skin and a manufacturing method thereof. Background technique [0002] China is one of the largest automobile production and sales countries in the world. In recent years, my country's automobile industry has maintained steady and rapid growth. Taking 2014 as an example, the production and sales of automobiles reached 23.7229 million and 23.4919 million respectively, a year-on-year increase of 7.26% and 6.86%, and the supporting automotive interior industry has also been booming. [0003] With the improvement of living standards, people have higher and higher requirements for the environmental protection and comfort of automobile interiors. As one of the important materials of automotive interiors, skin cladding materials such as instrument panels, glove boxes, and armrests are also highly valued by people. Traditional hard plastic and semi-hard plastic skin inte...

AI Technical Summary

Problems solved by technology

The above two patents are prepared based on aliphatic isocyanate system, but as we all know, the high price of aliphatic isocyanate greatly increases the production cost of PU skin, limiting its large-scale industrial application

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