Manufacturing method for wood-plastic composite floor

Abstract

The invention relates to a manufacturing method for a wood-plastic composite floor, in particular to the manufacturing method for the wood-plastic composite floor. The manufacturing method comprises the following steps: wood flour is carbonized in the temperature of 200 to 240 DEG C for 5 to 15 min to obtain modified wood flour; 50 to 70 parts by weight of modified wood flour and 30 to 50 parts by weight of plastic powder are mixed and plasticized in advance to obtain wood-plastic blended powder; the obtained wood-plastic blended powder is put into an extruder and extruded to take on a plate shape by a die head to obtain the wood-plastic composite board; and the wood-plastic composite board is cooled, shaped, and professionally processed in later period to obtain the wood-plastic composite board. The wood flour is processed in the wood flour processing step so that polar groups on the surface of wood fiber are destroyed; the water absorption rate of the processed modified wood flour is reduced by more than 50%; and then powder blending step is carried out so as to reduce the water absorption rebound resilience of the wood-plastic composite material, thus achieving the purpose of reducing plastic proportion and increasing the quality of products.

Description

technical field [0001] The invention relates to a production method of wood floor, in particular to a production method of wood-plastic composite floor. Background technique [0002] Wood-plastic composite material is made of plastic and wood fiber, which is an ideal wood substitute and an ideal material to replace the wooden floor of the home. It is predicted that the demand for wood in my country this year will be 100 million tons, while the supply is only 64 million tons, which is a big gap. As an alternative product, wood-plastic composite flooring has an extremely wide sales market. The production principle of wood-plastic composite flooring is to combine processed plastics with crushed wood powder (such as: plant fiber straw, passenger points, sawdust, shavings, etc.), stabilizers, coupling agents, lubricants, colorants, etc. It is made by melting and kneading together, and then extruded and cooled by an extruder. [0003] As we all know, there are a large number of ...

AI Technical Summary

Problems solved by technology

[0003] As we all know, there are a large number of polar groups on the surface of wood fibers. During the preparation of wood-plastic composites, there is a relatively large interfacial energy difference between hydrophilic wood fibers and hydrophobic polymers. It is difficult to fully integrate the two interfaces. Therefore, the wood fiber cannot be dispersed evenly in the polymer

The aggregates of these wood fibers easily lead to stress concentration under the action of external force, so that the wood powder in the wood-plastic composite material will rebound after absorbing the moisture in the air, which will affect the use quality of the wood-plastic composite material.

In order to solve the problem of water absorption and rebound of wood-plastic composite materials, when producing wood-plastic composite materials, it is generally improved by increasing the proportion of plastics, but this increases the cost of wood-plastic composite materials, making it difficult to be widely used in some occasions

Moreover, increasing the proportion of plastic in wood-plastic composite materials is even more inappropriate as a floor material. The greater the proportion of plastic, the less elastic the material, the greater the plasticity, and the floor feels bad.