The main features of wood-plastic composite materials:
Wood-based composites are based on high-density polyethylene and wood fibers, which determine their own properties of plastics and wood.
1) Good processing properties Wood-plastic composites contain plastics and fibers. Therefore, they have the same processing properties as wood. They can be sawed, nailed, and planed. They can be finished with woodworking tools, and the nail holding power is obviously better. Other synthetic materials. Mechanical properties are superior to wood materials. The nail holding power is generally three times that of wood and five times that of particle board.
2) Good strength properties Wood-plastic composites contain plastic and thus have a good modulus of elasticity. In addition, since it contains fibers and is thoroughly mixed with plastic, it has physical and mechanical properties such as compression resistance and bending resistance comparable to hardwood, and its durability is remarkably superior to ordinary wood materials. The surface hardness is high, generally 2 to 5 times that of wood.
3) It has water resistance, corrosion resistance and long service life. Compared with wood, it can resist strong acid and alkali, water and corrosion, and does not breed bacteria, and is not easy to be infected by insects or fungi. Long service life, up to 50 years.
4) Excellent adjustability Through the additives, plastics can undergo polymerization, foaming, curing, modification and other changes, thereby changing the density, strength and other characteristics of wood-plastic materials, and can also achieve anti-aging, anti-static, flame retardant, etc. special requirements.
5) It has excellent UV light stability and good colorability.
6) Its biggest advantage is to turn waste into treasure and 100% recycling. It can be decomposed, does not cause "white pollution", and is a truly green product.
7) Sources of raw materials The plastic raw materials for the wide-ranging production of wood-plastic composite materials are mainly high-density polyethylene or polypropylene. The wood-based fibers may be wood flour, gluten or wood fiber, and a small amount of additives and other processing aids are required.
8) Can be made into any shape and size as needed.
With the development of wood-plastic composite materials, plastic raw materials for the production of wood-plastic composite materials, in addition to high-density polyethylene or polypropylene, also have polyvinyl chloride and PS. The process has also evolved from the earliest single-screw extruder to the second-generation conical twin-screw extruder, to the preliminary granulation by a parallel twin-screw extruder, and then extrusion molding from a conical screw to make it difficult to plasticize. , poor anti-aging properties, poor creep resistance, color consistency and poor durability and tensile strength, etc. After years of research and development in China, some enterprises represented by Xuzhou Hanyong Plastic New Materials Co., Ltd. have produced WPC materials. It can fully meet the requirements of GB/T 24137 and ASTM D7031; ASTM D7032; BS DD CEN/TS 15534-3. And a large number of exports abroad.
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