Polyurethane closed-cell foam product and manufacturing technology thereof

Abstract

The invention discloses a polyurethane closed-cell foam product which comprises a leather layer and a PU foam material layer, wherein the foam material layer is arranged on the leather layer, glass fiber gridding cloth is arranged in the foam material layer, and a polyester toughened breathable layer is arranged on the foam material layer. A foam product manufacturing technology comprises the steps: 1, preparing a mould and heating the mould; 2, rolling a gridding glass fiber cloth layer and a toughened breathable composite material according to stipulated area, size and layer number for standby application; 3, flatly laying leather into a lower mould body; 4, laying the glass fiber gridding cloth on the leather and injecting a PU material into the mould; 5, covering the PU material by the toughened breathable composite material; 6, closing the mould, maintaining pressure and foaming. Before being laid, glass fibers are woven into nets and cloth; thus, use amounts of the glass fibers and the PU foam material are reduced, a product density is reduced to 395 to 392 kg / m<3> from 500kg / m<3>, a weight is reduced by about 20%, mechanical property of the product is improved, composite cost is reduced by about 25%, and good economical benefits are achieved.

Description

technical field [0001] The invention relates to the field of manufacturing automotive interior parts, in particular to a closed-cell polyurethane foam product and a manufacturing process thereof. Background technique [0002] In recent years, new energy buses have developed rapidly in this environment, and the industry has higher and higher requirements for lightweight bus interiors. At present, polyurethane foamed passenger car and bus air duct and luggage rack floor have certain advantages in light weight in the industry with a density of about 500kg / m3. At present, the short glass fiber used in the industry is reinforced. It is disordered when mixed, and its mechanical properties are isotropic. It cannot maximize its longitudinal mechanical properties and strength, and cannot meet market demand. With the advancement of technology, the country's requirements for environmental protection are getting higher and higher. The passenger car interior industry is in urgent need of...

AI Technical Summary

Problems solved by technology

At present, polyurethane foamed passenger car and bus air duct and luggage rack floor have certain advantages in light weight in the industry with a density of about 500kg / m3. At present, the short glass fiber used in the industry is reinforced. It is disordered when mixed, and its mechanical properties are isotropic. It cannot maximize its longitudinal mechanical properties and strength, and cannot meet market demand. With the advancement of technology, the country's requirements for environmental protection are getting higher and higher. The passenger car interior industry is in urgent need of a A light-weight, high-performance polyurethane closed-cell foam product to meet various needs

[0003] In the passenger car interior industry, polyurethane closed-cell foaming technology is widely used in air ducts, luggage rack floor and other products. The common practice is to use PVC leather as the decorative bottom layer and foam on PVC leather. Because PVC leather is not breathable , The gas generated by polyurethane closed-cell foaming is very easy to produce cavitation on the surface of the product, which needs to be repaired, resulting in a decrease in production efficiency and product quality. At present, there is no way to solve these problems

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