Foamed wood plastic composite material and its preparation method

Abstract

The invention relates to a foamed wood plastic composite material and its preparation method, the foamed wood plastic composite material comprises the following raw materials by weight proportion: 50-60 parts of wood powder, 20-30 parts of polypropylene, 20-25 parts of polyethylene, 5-8 parts of ethane-acrylate, 2-6 parts of sodium bicarbonate and 3-5 parts of petroleum resin. The foamed wood plastic composite material has the advantages that wood powder enables good combination with a polymer, no bubbles and no pitting are generated after heating, the shock resistance is good and the number of the low temperature drop hammer impact fracture is zero.

Description

technical field

[0001] The invention relates to a foamed wood-plastic composite material. Background technique

[0002] Wood-plastic composites (Wood-Plastic Composites, WPC) is a new type of composite material that has been booming at home and abroad in recent years. It refers to the use of polyethylene, polypropylene and polyvinyl chloride, etc. Wood flour, rice husk, straw and other waste plant fibers are mixed into new wood materials, and then processed by extrusion, molding, injection molding and other plastic processing techniques to produce boards or profiles. Mainly used in building materials, furniture, logistics packaging and other industries. The board formed by hot extrusion after mixing plastic and wood powder in a certain proportion is called extruded wood-plastic composite board.

[0003] However, the main problems of wood-plastic composite materials are: first, poor toughness and poor impact resistance, and second, insufficient contact between wood powder a...