Wood-plastic decorative sheet for building

Abstract

The invention relates to a wood-plastic decorative sheet for a building. The wood-plastic decorative sheet is prepared from the following raw materials in percentage by weight: 15 to 20 percent of thermoplastic high-density polyethylene, 15 to 20 percent of wood meal, 15 to 20 percent of rice hull powder, 15 to 20 percent of straw powder, 3 to 6 percent of talcum powder, 1 to 3 percent of grafted compatilizer, 1 to 3 percent of compound stabilizer, 1 to 3.5 percent of lubricant, 3 to 6 percent of foaming regulator, 1 to 3 percent of AC (Azodicarbonamide) foamer, 0.2 to 0.8 percent of tribasic lead sulfate, 0.8 to 1.5 percent of plasticizer, 1 to 2.5 percent of silicon flame retardant, 2 to 5 percent of macromolecular polymer flame retardant, 1 to 3 percent of bactericide, 1 to 3 percent of antioxidant, 0.5 to 1.2 percent of ultraviolet absorbent and 0.5 to 1.2 percent of mildew preventive. According to the wood-plastic decorative sheet, waste materials from agricultural production are used as base materials; the mixing proportion of used plastic is improved; a novel material is adopted for compatibleness; the production is simple; the obtained wood-plastic decorative sheet is good in mechanical performance and high in strength, has favorable fireproofing, mildew-proofing and germ-proofing performance and is further green and environment-friendly.

Description

technical field [0001] The invention relates to the field of building decoration, in particular to a building wood-plastic decorative board. Background technique [0002] Architectural wood-plastic decorative panels are a new type of composite panels that have been booming at home and abroad in recent years. Usually, polyvinyl chloride is used instead of the usual resin adhesive, and more than 30% of wood powder is used to synthesize new wood materials, and then extruded, Sheets or profiles produced by molding, injection molding and other plastic processing techniques. Natural wood boards have defects such as easy shrinkage and cracking, mutability when exposed to water, and flammability when exposed to fire. Physically harmless. Compounding wood flour and plastic is one of the main contents of follow-up research, but the compatibility of wood flour and plastic is poor. At present, wood-plastic panels have gradually entered people's lives. Chinese patent "Production of w...

AI Technical Summary

Problems solved by technology

Chinese patent "Production of wood-plastic decorative panels for construction and its preparation method" (application publication number CN 103804817 A; application publication date 2014.05.21) improves the interfacial compatibility of materials through material proportioning, and improves the compatibility of material components. compatibility, but the compatibility is still not high, and cracking still occurs after a long time of use; it relies on wood powder, and the use of wood powder consumes a large amount of wood, and the proportion of polyvinyl chloride is large, and the processing performance and mechanical properties are not good. The wood-plastic decorative board is flammable

And aiming at the flammability problem of wood-plastic decorative boards, existing wood-plastic decorative boards have added magnesium oxide to the wood-plastic decorative board materials to be fire-resistant and flame-retardant. Publication number CN 105777055 A; application publication date 2016.07.20) Since the magnesium oxide material itself is unstable, it is easy to absorb moisture and carbon dioxide in the air and become basic magnesium carbonate, and when the proportion of magnesium chloride in the fireproof material is too high, it will cause The performance of the product is poor, even bursting. When the proportion of magnesium chloride is too low, it will make the strength of the product insufficient. Therefore, the wood-plastic decorative board with magnesium oxide as the fireproof material is difficult to produce on a large scale.

In addition, the anti-mildew and anti-bacteria of building wood-plastic decorative panels is also a problem.