Environment-friendly PVC (polyvinyl chloride) coextruded colored paint-free plate and preparation method thereof

Abstract

The invention discloses an environment-friendly PVC (polyvinyl chloride) coextruded colored paint-free plate and a preparation method thereof. The PVC layer is prepared from 45-55 parts of PVC resin, 1.5-3 parts of composite calcium zinc stabilizer, 0.3-0.5 part of G60, 0.1-0.2 part of polyethylene wax, 20-27 parts of calcium carbonate, 2.5-3.5 parts of ACR, 1.2-1.8 parts of titanium dioxide and 2-3 parts of PVC color master batch. The PVC foamed layer is prepared from 70-80 parts of PVC, 2.5-4.5 parts of composite calcium zinc stabilizer, 0.4-0.8 part of G60, 0.3-0.6 part of polyethylene wax, 45-53 parts of calcium carbonate, 5.5-6.5 parts of ACR, 0.3-0.5 part of oxidized polyethylene wax, 0.8-1.2 parts of sodium bicarbonate and 1.8-2.2 parts of titanium dioxide. The coextruded colored paint-free plate has the advantages of high stability, favorable hardness and favorable heat stability.

Description

technical field [0001] The invention relates to the technical field of plastic processing, in particular to a preparation method of an environment-friendly PVC co-extrusion color paint-free board. Background technique [0002] PVC decorative board has the characteristics of light weight, heat insulation, heat preservation, moisture resistance, flame retardant, and easy construction. Due to its various specifications, colors, and patterns, it is very decorative, so it is widely used in the decoration of living room walls and ceilings. It is one of the most widely used decorative materials in plastic materials. [0003] In order to reduce production costs, the most commonly used filler in the production and processing of PVC products is calcium carbonate. Calcium carbonate can improve the dimensional stability, rigidity, heat resistance, etc. of PVC products. However, calcium carbonate is an inorganic filler with a high melting point. It is still solid at the processing melti...

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Problems solved by technology

[0003] In order to reduce production costs, the most commonly used filler in the production and processing of PVC products is calcium carbonate. Calcium carbonate can improve the dimensional stability, rigidity, heat resistance, etc. of PVC products. However, calcium carbonate is an inorganic filler with a high melting point. It is still solid at the processing melting temperature, and it is not easy to disperse during processing, and it is dispersed in the PVC system, which will hinder the fusion of PVC particles. The phenomenon that the plasticization is not in place, when the filling amount is high, the adsorption amount of the liquid additive increases, and there will be a large frictional heat between the calcium carbonate particles and the processing equipment, resulting in an accelerated plasticization speed, which is easy to produce Surface defects such as hair spots, wrinkles, weld marks, etc., in addition, it will also have some negative effects on the hardness and thermal stability of PVC decorative panels

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