Wood plastic composite and preparation method thereof

Abstract

The invention discloses a wood plastic composite and a preparation method thereof. The composite is characterized by being prepared by the method comprising the following steps: taking 20-80g / m<2> of needle fabric as a reinforcing material and 100 parts of thermoplastic high polymer and 10-60 parts by weight of wood flour in parts as matrixes, and then compounding the three compounds, wherein thethermoplastic high polymer is polyethylene, polypropylene, polrvinyl chloride (PVC) or polystyrene; and the grain size of the wood flour is 20-300 meshes. The preparation method comprises the following steps: evenly mixing the thermoplastic high polymer with the wood flour in a screw extruder; melting the mixture; extruding the melted mixture in a die on which the needle fabric is laid in advance; and carrying out compression moulding forming to obtain the wood plastic composite.

Description

technical field [0001] The invention relates to composite material technology, in particular to a wood-plastic composite material using non-woven fabric as a reinforcing material and a preparation method thereof. Background technique [0002] Wood-plastic composites (WPC) are a new type of material that is compounded with lignocellulose as a reinforcement and thermoplastics as a matrix. It combines the dual advantages of the matrix and the reinforcement, and has relatively good mechanical properties, high impact strength, water resistance, moisture resistance, wear resistance, chemical corrosion resistance, and good dimensional stability. Wood-plastic composite materials are in great demand in construction and decoration materials, transportation, garden landscape, furniture, etc. However, existing wood-plastic composite materials have the defects of high density and poor impact resistance. [0003] Chinese patent CN101486267 reports a kind of surface flame-retardant wood-...

AI Technical Summary

Problems solved by technology

Chinese patent CN101629022 utilizes the carbon-carbon double bonds and silyl groups on the surface of the modified aramid fiber to form chemical bonds with polyolefin and wood flour, which makes the aramid fiber and polyolefin have good compatibility and effectively enhances the composite material. The interface bonding force makes the aramid fiber reinforced wood-plastic composite material have high strength and high toughness at the same time, and the comprehensive mechanical properties are good, but the price of modified aramid fiber is relatively high, which increases the production cost accordingly, which is not conducive to popularization and use

Although these methods have a certain reinforcement effect, the actual reinforcement effect does not reach the ideal value because the reinforcement material used is short fibers, and the fibers are distributed randomly and unevenly in the matrix plastic.