Modified wood-plastic composite material

Abstract

The invention discloses a modified wood-plastic composite material which is prepared by using polyphenylene sulfide, wood flour, compound glass fiber powder and polyethylene plastic powder as main raw materials, and the polyphenylene sulfide is subjected to heat treatment before being added, so that the effect of improving the crystallinity of the polyphenylene sulfide is achieved, and the glass transition of the composite material during extrusion is reduced; the formed composite material fiber is large in density, higher in strength and not prone to breakage, the compatibilizer is added, the cross section bonding of the compound glass fiber and the polyphenylene sulfide can be improved, the produced wood-plastic composite material obtains higher strength, crystalline PE chain links in the POE elastomer added in the preparation process can be cross-linked with the cross-linking agent added in the auxiliaries, the amorphous ethylene long chain can provide elasticity, so that the aims of improving the toughness of the wood-plastic composite material while improving the mechanical property of the wood-plastic composite material are fulfilled, and the quality of the modified wood-plastic composite material is better.

Description

technical field [0001] The invention relates to the technical field of wood-plastic composite material preparation, in particular to a modified wood-plastic composite material. Background technique [0002] Wood-plastic composites are made of thermoplastics, such as polyethylene, polypropylene, polyvinyl chloride, and polystyrene, and their recycled materials, combined with wood fibers or plant fibers. The material has both wood and plastic properties. Features, thermal expansion and water absorption are smaller than wood, good dimensional stability, high wear resistance and impact resistance, the product can be recycled, but due to poor compatibility between thermoplastics and highly polar wood materials, the interface mutual The force is weak, the plastic / wood interface is prone to damage, creep deformation is prone to occur under the action of internal stress or external load, and the mechanical properties of the composite material are poor. If reinforcing materials are b...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a modified wood-plastic composite material that can increase the toughness of the wood-plastic composite material while improving the mechanical properties of the wood-plastic composite material. The modified wood-plastic composite material is not easy to break and has better quality. To solve the problem of poor compatibility between thermoplastics and high-polarity wood materials proposed in the above background technology, the interface interaction force is weak, the plastic / wood interface is prone to damage, and creep deformation is prone to occur under the action of internal stress or external load. Composite materials The mechanical properties are poor. If reinforcing materials are blindly added to the interior of the composite material during the preparation process, the brittleness of the composite material will increase, making it easier to break, and the problem of poor practicability