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Introduction to Wood Plastics

Release Time:

2023-04-20 16:11

Wood Plastic Composites (WPC) is a new type of composite material that has flourished both domestically and internationally in recent years. It refers to the use of polyethylene, polypropylene, and polyvinyl chloride to replace common resin adhesives, and is mixed with more than 50% of waste plant fibers such as wood powder, rice husk, and straw to form new wooden materials. It is then processed through plastic processing processes such as extrusion, molding, and injection molding to produce boards or profiles. Mainly used in industries such as building materials, furniture, logistics and packaging. The board formed by hot extrusion after mixing plastic and wood powder in a specific proportion is called extruded wood plastic composite board.

With the development of wood-plastic composite materials, the plastic raw materials for producing wood-plastic composite materials include not only high-density polyethylene or polypropylene, but also polyvinyl chloride and PS. The process has also evolved from early single screw extruders to second-generation conical twin screw extruders, followed by preliminary granulation by parallel twin screw extruders, followed by conical screw extrusion molding, which can compensate for difficulties in plasticization, poor aging resistance, creep resistance, color consistency and durability, and tensile strength. [1] After years of research and accumulation, WPC materials manufactured by multiple research institutes and Hanyong Plastic New Materials in China can meet the standards of GB/T 24137 and ASTM D7031; ASTM D7032; The requirements of BS DD CEN/TS 15534-3.

Applicable scope

One of the main uses of wood plastic composite materials is to replace solid wood in various fields, with the most widely used being in construction products, accounting for 75% of the total amount of wood plastic composite products.

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