A kind of wood-plastic foam composite material and preparation method thereof

Abstract

The invention discloses a wood-plastic foamed composite material and a preparation method thereof. The invention is characterized in that the composite material is prepared from the following raw materials in parts by weight: 40-50 parts of PVC (polyvinyl chloride) resin, 30-35 parts of light calcium carbonate, 10-20 parts of wood meal, 3.5-4.5 parts of ACM impact resistance agent, 3-4 parts of HL-100 processing assistant, 3-4 parts of liquid barium-zinc composite stabilizer, 1.5-2.5 parts of PE (polyethylene) wax, 0.5-0.7 part of calcium stearate, 0.8-1.2 parts of foaming agent, 1.5-2 parts of epoxy soybean oil, 0.5-1.0 part of sodium bicarbonate and 15-25 parts of recovered PVC waste. The preparation method comprises the following steps: proportionally preparing materials, heating, mixing, cooling, carrying out extrusion forming, and carrying out random inspection. Compared with the existing wood-plastic foamed composite material, the wood-plastic foamed composite material disclosed by the invention has the advantages of high shock strength, low production cost, favorable heat stability, high processibility and high and balanced foaming capacity.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a wood-plastic foamed composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a new type of composite material with high performance and high added value, which uses wood and plastic as the main raw materials and is produced by different composite methods. In recent years, with the development of science and technology, the modern society has higher requirements for plastic materials, which require not only good performance and low price, but also high temperature resistance and easy processing; Has good toughness. However, traditional plastic materials are difficult to meet the needs of society, but people soon realized that the modification of plastic filling can not only reduce production costs, but also improve the performance of products. Therefore, in the late 1980s, Japan, the United Sta...

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Problems solved by technology

Patent CN102746594A discloses a wood-plastic board and its preparation method, which is processed from PVC resin, wood powder, light calcium, composite stabilizer, lubricant, foam regulator, foaming agent, three salts, and plasticizer. The wood-plastic board has the advantages of waterproof, moisture-proof, anti-fog, and high environmental protection. However, the wood-plastic board uses new PVC resin as raw material, and the price and cost are relatively high compared with the new waste PVC resin mixture; in the formula Composite stabilizers are used to achieve impact resistance and stability, but the improvement of various performances is limited

Patent CN103059474A discloses a wood-plastic composite foam board and its preparation method, using PVC resin, chlorinated polyethylene elastomer, powdered nitrile rubber, POE, HL-90 or LP90, AC foaming agent, NC foaming agent , composite lead salt stabilizer, oleyl sebacate, light calcium, wood flour, PE wax, OPE wax and recycled materials. The composite foam board has the characteristics of high static bending strength and high elastic modulus. However, In this scheme, composite lead salt stabilizer and nitrile rubber are used, which have certain toxicity and its application is limited

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