Wood plastic composite material technology

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 developed from the earliest single screw extruder to the second generation conical twin screw extruder, and then to the parallel twin screw extruder for preliminary granulation, and then to the conical screw extrusion molding, which can make up for difficult plasticization, poor aging resistance, poor creep resistance, poor color consistency and durability, and poor tensile strength. [1] After years of research and accumulation, WPC materials manufactured by multiple research institutes and Hanyong Plastics in China can fully meet the standards of GB/T 24137 and ASTM D7031; ASTM D7032; The requirements of BS DD CEN/TS 15534-3.