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Analysis of wood plastic composites

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    In the field of wood plastic composite materials, now the research focus is mainly concentrated in polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), polystyrene (PS) thermoplastic plastic and wood powder, straw powder, plant shell and wood powder as raw materials and composite materials by extrusion, injection molding, pressing made of shaping. From the production of raw materials, wood plastic composite materials can be used a variety of waste plastics, waste wood and crop residues. Therefore, the development and wide application of wood plastic composite materials can help to reduce the pollution of plastic waste, and also help to reduce the pollution caused by agricultural waste incineration. The production and use of wood plastic composite material, not to the surrounding environment from harm to human health of volatiles, the material itself Recyclable use, is a kind of new green products, is also a kind of eco clean composite materials.

    Thermoplastic wood plastic composite (WPC) is a kind of modified thermoplastic material, which is filled with wood fiber or plant fiber, and is processed by hot pressing and melt extrusion. In recent years, with the increasing depletion of global resources, social awareness of environmental protection has become increasingly high, put forward higher requirements for the application of wood and petrochemical products. In this context, the wood plastic composite material not only can play the advantages of each component material, overcome the limitations due to the use of wood of low strength, large variability and low modulus of elasticity of organic materials caused, and can make full use of waste wood and plastics, to reduce environmental pollution. At present, more and more attention has been paid to the improvement of the added value of the products.

    At present, foreign countries have been added to the wood plastic composite additives, such as improving the strength of coupling agents, lubricants, light stabilizers, antibacterial agents, water absorbent, chemical blowing agent, etc.. The development of these auxiliary products has attracted the attention of many scientists and has made some progress. The United States has a patent report, in the wood plastic composite materials can be added to the dye with long-lasting anti fading ability, and the existing color wood plastic composite materials. Other studies have shown that alkyl quaternary ammonium salts, such as carboxylic acids, sulfates, and so on, can make wood plastic composites have antibacterial properties. It is a new research hotspot to deal with wood flour by surface radiation. In addition, these researches will further expand the application range of wood plastic composites.

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