High-strength wood-plastic composite panel and preparation method thereof

Abstract

The invention relates to a high-strength wood-plastic composite panel and a preparation method thereof. The preparation method comprises the steps of: drying wood flour firstly and using an aluminate coupler to modify; then mixing modified wood flour, plastic particles, dicumyl peroxide and basic magnesium sulfated whisker uniformly and extruding and pelleting to obtain composite particles; then mechanically and uniformly agitating the composite particles, a polyolefin elastomer, terpene resin and an antioxygen; and performing melt blending and extruding by an extruder to obtain the high strength wood-plastic composite panel through a flat mould. The high-strength wood-plastic composite panel is convenient to produce and manufacture. Conventional wood-plastic composite which is not modified can be used for production and manufacturing. The mechanical degree of the production process is high, labor required is less, the production cost is low, and the dosage of plastic is less. The high-strength wood-plastic composite panel provided by the invention is environment-friendly, high in strength, creep deformation resistive, excellent in mechanical performance, long in service life, and can be widely applied to fields of traffic, decoration, municipal gardens, packaging and the like.

Description

technical field [0001] The invention relates to a plastic-wood composite material, in particular to a high-strength plastic-wood composite material board and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a new type of composite material that is made of plant fiber powder such as plastic and wood powder as the main raw material, together with other additives through extrusion, molding, injection and other processes. It has the characteristics of no cracking and no deformation. , corrosion resistance, strong plasticity, can realize personalized modeling very simply, high environmental protection, no pollution, no pollution, the product does not contain benzene, formaldehyde and other substances, and can be recycled. It is a brand new green environmental protection product. An ecologically clean composite material is attracting more and more attention in recent years. Wood-plastic composite materials can be used as packaging...

AI Technical Summary

Problems solved by technology

However, since one of the main raw materials for preparing wood-plastic composite materials, plant fibers, is mainly composed of cellulose, hemicellulose and lignin, which contain a large number of polar groups such as alcoholic hydroxyl groups, oxygen and phenolic hydroxyl groups, and the preparation of wood-plastic composite materials The surface of thermoplastic polyolefin, another main raw material of the material, is non-polar (low) polar, so the polarity of the two is very different, and the hydroxyl groups in the plant fibers can form intermolecular hydrogen bonds and intertwined with each other, making it uneven The above two factors often lead to poor interfacial compatibility between fibers and plastics, coupled with the low reinforcement effect of natural fibers themselves, resulting in some obvious deficiencies in wood-plastic composite products, such as static The bending strength is low, the bearing capacity is poor, and bending may occur after long-term use. Especially when it is used in the air, bending deformation is more likely to occur, which affects its use effect, shortens its service life, and limits its use range.