Method for producing wood-plastic composite material

Abstract

The invention relates to a method for preparing wood-plastic composite materials. The method comprises the following steps: 1) thoroughly mixing 50-100 weight parts of wood powder with 40-200 weight parts of fillers with a high-speed mixer, adding 1-20 weight parts of finishing agents into the high-speed mixer, and stirring at 80-120 DEG C for 10-20 min; 2) adding 10-20 weight parts of addition agents in the resulting powder mixture, stirring for 3-6 min to allow uniform dispersion; 3) delivering the resulting mixture produced in the step 2) to a fluidized bed dryer for drying until the water content is below 3%, granulating by using a ring mould pellet mill to obtain pressed pellets; and 4) mixing resin granules with pellets at a weight ratio of 1:(1-2) and extrusion-molding to obtain the final product. The preparation method is implemented by pressing and pelletizing wood powder, mixing wood pellets with plastic granules and conducting extrusion processing, overcomes material feeding difficulties, and can double the yield and increase production capacity.

Description

A kind of preparation method of wood-plastic composite material technical field The invention relates to a wood-plastic composite material, in particular to a preparation process for producing the wood-plastic composite material by adopting a two-step method. Background technique Wood-plastic composite materials can be widely used in packaging, construction and other industries. Compared with wood, they also have the advantages of easy processing, high strength, anti-corrosion, insect-proof, moisture-proof, long service life, and reusable. In recent years, the research on wood-plastic composite materials has become a hot spot in the same industry at home and abroad. However, the performance of the existing wood-plastic products is low, and the product quality is unstable. In the traditional process of extrusion, because the wood powder is in the form of very fine fibers and the density is very small, it is easy to bridge during the process of blanking, resulting in The ma...

AI Technical Summary

Problems solved by technology

The main purpose of the present invention is to overcome the defects existing in the existing wood-plastic composite material preparation process, and provide a new type of wood-plastic composite material preparation method. The bulk density is low, and it is difficult to cut the material during the extrusion process, resulting in low output and uneven dispersion.