Mildew-proof plastic-wood composite sheet and preparation method thereof

Abstract

The invention relates to a mildew-proof plastic-wood composite sheet and a preparation method thereof. The preparation method comprises the following steps of: firstly mixing 8-hydroxyquinoline copper with running water evenly, atomizing and spraying the solution on the surface of the wood powder to obtain modified wood flour; and then mixing the wood flour with the methylene diphenyl diisocyanate at high speed, thereby obtaining the wood flour subjected to surface treatment; mixing with other components together after drying the wood flour subjected to surface treatment, squeezing out the mixture, cooling and crushing the mixture to obtain plastic-wood composite sheet granules; and finally melting and blending the plastic-wood composite sheet granules by adopting an extruder, squeezing out and molding to obtain the mildew-proof plastic-wood composite sheet. The mildew-proof plastic-wood composite sheet has the advantages of convenience in manufacturing, low cost, environmental friendliness, high modulus, high stiffness, creep resistance, and no buckling deformation; and mildew-proof treatment is not needed, and mildewing does not occur in the use process. The mildew-proof plastic-wood composite sheet can be widely applied to occasions such as parks, playgrounds, municipal administration and the like, and even can be used in damp environments such as dockyard piers, water trestles, beach guardrails.

Description

technical field [0001] The invention relates to a plastic-wood composite material, in particular to a mildew-resistant plastic-wood composite material board and a preparation method thereof. Background technique [0002] Wood-plastic composite materials are based on primary biomass materials such as wood powder, bamboo chips, wheat straw, rice bran, peanut shells, and cotton straw. Plastic base material, a basic material with reversible recycling and various morphological structures, which is processed and formed after special processing. Common wood-plastic composite products include structural, decorative, packaging, and special types, including wires, profiles, plates, sheets, and profiled materials. Its scope of application can cover almost all logs, Plastic, plastic steel, aluminum alloy and other similar composite materials are now used in fields such as construction, home improvement, furniture, logistics, packaging, gardening, municipal administration, environment...

AI Technical Summary

Problems solved by technology

[0003] But even so, there are some obvious deficiencies in the use of wood-plastic composite materials. For example, wood powder, bamboo powder, bran powder, etc. are generally used in large quantities in the production process of wood-plastic composite materials. These plant fiber powders can be used for various The growth and growth of mold provide nutrients. If it is used for a long time, especially in a dark and humid environment, plastic wood products are prone to mildew, which will affect its appearance and shorten its service life, which seriously limits its scope of use.