Composite board with high gloss liner, high gloss liner and refrigerator

Abstract

The invention provides a composite board with a high gloss liner, the high gloss liner and a refrigerator. The composite board comprises a surface layer and a middle layer, wherein the surface layer is formed by a high gloss styrene material prepared from polystyrene and a styrene-butadiene block copolymer; and the middle layer is arranged on the surface of one side of the surface layer. The composite board provided by the invention comprises the surface layer and the middle layer, wherein the surface layer is formed by the high gloss styrene material prepared from the polystyrene and the styrene-butadiene block copolymer, and thus, the styrene-butadiene block copolymer is selected as a toughening agent for the polystyrene, so that not only is the toughness of the surface layer improved, but also the high glossiness of the composite board is kept after the composite board is processed into the liner of the refrigerator through plastic molding.

Description

technical field [0001] The invention relates to the technical field of refrigerator liner materials. Specifically, the invention relates to a composite plate of a high-gloss liner, a high-gloss liner and a refrigerator. Background technique [0002] The industry has been committed to improving the gloss of the refrigerator liner. The higher the gloss, the better the appearance and texture of the refrigerator, which can improve the grade of the refrigerator. At present, there are generally two types of refrigerator liner materials, acrylonitrile-butadiene-styrene copolymer (ABS) and impact-resistant polystyrene (HIPS). Among them, the ABS liner has high gloss and high comprehensive performance, but the price is high, and the corrosion resistance of the multi-component foam agent in the refrigerator is poor. Therefore, the ABS liner is only used in a very small number of high-end refrigerators. Most of the refrigerators use HIPS liners, which are moderately priced and have go...

AI Technical Summary

Problems solved by technology

However, due to the characteristics of high-gloss HIPS, when the co-extruded high-gloss HIPS composite sheet (gloss <80) undergoes blister molding, the gloss of the inner tank will be greatly reduced (the gloss of the inner tank will drop to 25-60)

Moreover, the higher the stretching ratio of the blister, the thinner the thickness of the high-gloss layer, so that the lower the gloss of the inner tank, so the problem that the entire gloss distribution is very uneven, and even some areas are almost dull, and , the gloss of the parts with high gloss is far less than that of ABS

[0004] In the development of high-gloss PS liners, some companies also try to use general-purpose styrene (GPPS) as the high-gloss layer of the liner. However, GPPS has poor impact resistance and is prone to cracks and other defects during the sheet material blister molding process. In the reliability test of the whole refrigerator, it is easy to have the failure of inner liner cracking, so the feasibility of this scheme is poor

If the toughness of GPPS is improved by adding conventional tougheners such as styrene-butadiene-styrene block copolymer (SBS), hydrogenated styrene-butadiene block copolymer (SEBS), and styrene-butadiene rubber, On the contrary, the gloss of the board will be sacrificed, and the gloss of the liner will also drop sharply after the blister is stretched, so that the effect of the high-gloss liner cannot be achieved

Images