High-strength PE (polyethylene) wood-plastic composite material and preparation method thereof

The invention discloses a high-strength PE (polyethylene) wood-plastic composite material which is prepared from the following raw materials in parts by mass: 20-50 parts of waste PE plastic, 40-70 parts of plant fiber powder, 0-15 parts of thermoplastic elastomer, 2-6 parts of interfacial compatilizer, 0-20 parts of reinforcing filler, 1-6 parts of lubricant, 0.4-0.6 part of anti-aging assistant and 0.1-0.5 part of initiator. The invention also discloses a preparation method of the PE wood-plastic composite material, which comprises the following steps: 1) uniformly mixing the raw materials, and carrying out extrusion and granulation in an extruder; and 2) carrying out extrusion forming on the granules to obtain a plate. The wood-plastic composite material has excellent properties, such as favorable tensile strength, bending strength, bending modulus and the like. The interfacial compatilizer can effectively promote the interfacial properties of the substrate with other components, thereby enhancing the related properties of the composite material. The composite material has excellent workability, and can be sawed, nailed or shaven.