WPC (wood-plastic composites) is a new type of composite materials that have flourished at home and abroad in recent years, referring to the use of polyethylene, polypropylene and polyvinyl chloride, etc., instead of the usual resin adhesives. With more than 35%-70% of wood flour, rice husk, straw and other waste plant fibers mixed into new wood materials, and then through extrusion, molding, injection molding and other plastic processing technology, the production of plates or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. The sheet formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called extruded wood-plastic composite sheet.