Discussion on the hottest wood plastic composites

2022-10-19
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Discussion on wood plastic composites

wood plastic composites are modified thermoplastic materials filled and reinforced with wood fibers or plant fibers. They have the advantages of cost and performance of wood and plastics. They are extruded or pressed into profiles, plates or other products to replace wood and plastics. Wood fiber plastic mixtures have been studied for more than 80 years, but they have not been industrialized. About 15 years ago, a small amount of them were used in low value sound-absorbing products

due to the strengthening of the concept of environmental protection, the U.S. construction industry began to look for alternative materials like wood (non corrosive, non warping, convenient maintenance, appearance similar to wood), while the paper and wood processing plants in South Korea and Japan sought the application of sawdust, sawdust, etc. All these have promoted and accelerated the research and application development of wood plastic composites. Processing wood flour filling and blending materials into building and structural profiles is one of the most active fields in the extrusion industry at present, and new application development is also emerging in endlessly. Many countries have invested in accelerating the pace of development and application, especially the production of profiles, which is known as a "hot" market

manufacturers of plastic mixing machines in the United States believe that the development of wood plastic composites is the result of increasing attention to environmental issues. Industry consultants believe that the driving force for the development of wood plastic composites comes from the requirements of rational utilization of the earth's limited resources, reducing the consumption of raw wood, protecting forests, and recycling old wood flour and plastics

wood fibers include waste wood powder, shavings, sawn wood, and plant fibers are crushed rice stalks, peanut shells, coconut shells, sugarcane, flax, zema, jute, hemp, etc. Wood fiber and plant fiber have rich sources, low price, light weight, little wear on equipment, good dimensional stability, excellent electrical insulation, non-toxic, can be processed repeatedly, and can be biodegradable. Thermoplastics are mainly polyolefins such as PE, PP, PS and PVC, including new materials, recycled materials and their mixtures. Wood fiber and plant fiber were originally used as low-cost modified filling materials to improve the rigidity of plastics. Wood plastic composite plastics can make full use of resources and can be recycled. Whether the materials can be recycled has become an important consideration in material selection in industry, so the prospect of wood plastic composites is promising

as for wood plastic composites, experts in materials science have different opinions on this. In the early days, people thought it was the filling and modification of plastics. However, with the continuous development of research and application, knowledge is also developing. At present, the filling amount of wood fiber and plant fiber generally accounts for about 50 ~ 60% in wood plastic composites, and it has also been reported that it has reached 85% in recent years. Therefore, it is rather far fetched to say that it is a filling. When it comes to modification, generally speaking, it means that the material has added new characteristics or what is the market prospect of the original industrial chain in 2017? What is the price trend of wrapping paper? How does the industrial pattern change? Some features of are enhanced to some extent. Compared with plastics, wood plastic composites have a considerable degree of improvement in both hardness, stiffness and other mechanical properties, as well as in preventing aging and deformation. At the international wood plastic technology seminar held by us not long ago, experts commented that the recycled plastic raw material particles are full, and its compact structure may be more accurate, that is, wood plastic composites can not be simply considered as a product derived from plastic filling and modification, it is a new composite material

North America is currently the largest market for wood plastic composites in the world. An authoritative consulting company in the United States pointed out that in 2001, the consumption in the North American market alone reached 320000 tons. It is expected that the demand will increase at a double-digit rate before 2005, and the consumption in 2005 will double that in 2001. Among them, the consumption of planking (including platform, pavement slab, platform and pad) accounts for more than 60% of the total consumption. In addition to planking, there are also wall panels, ceilings, decorative panels, toe boards, wall panels, highway noise barriers, seaside flooring, building templates, moisture-proof boards, and wood plastic composite boards can be used. In addition, it can also be used for decorative frames, fences and garden handrails, packing box plates, base plates and combined trays, as well as furniture (including outdoor open-air tables and chairs), ship cabin partitions, office partitions, storage boxes, flower boxes, movable shelves, drapery boards, louvers, etc

as wood plastic composites are environmentally friendly materials, although the current consumption is small, but because the processing plants are worried that the European community will effectively limit the use of PVC in the form of regulations, it is a huge market and opportunity for wood plastic window frames to replace PVC window frames. Therefore, some people believe that the substitution of wood plastic products for PVC and other plastic products will grow as fast as the substitution of plastic products for wood products in the past

in a word, wood plastic composite is a promising environmental protection material, and its processing technology has become increasingly mature and diversified

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