Formula of PE (Poly Ethylene) wood plastic composite material of imitation wood grain surface and manufacture process thereof

Abstract

The invention discloses a formula of a PE (Poly Ethylene) wood plastic composite material for an imitating wood grain surface, which comprises a master batch I and a master batch II, wherein the master batch I is a primary color material and comprises an HDPE (High-Density Polyethylene) returned material I, recycled leftover plant fiber powder and an auxiliary material I; and the master batch II is a dispersed color material and comprises an HDPE returned material II, recycled leftover plant fiber powder and an auxiliary material II. The melt index of the master batch I is less than that of the master batch II. The invention also provides a manufacture process of the PE wood plastic composite material for the imitating wood grain surface. The natural imitating wood grain surface is directly formed by adopting the formula and the process during the production without carrying out surface machining; and the manufactured wood plastic material is not subjected to the removal of the surface skinning layer, thus the surface protection effect of a skinning layer is remained.

Description

technical field [0001] The invention relates to a formula of PE wood-plastic composite material and a manufacturing process thereof. Background technique [0002] As energy saving and emission reduction, environmental protection, green and circular economy are paid more and more attention by the society, various new materials are gradually coming out. Among them, wood plastic is responsible for "reducing white pollution" and "reducing CO2 emissions". The mission of replacing natural wood products came into being and gradually emerged in the market and application fields. However, most of the PE wood-plastic composite materials on the market now have a single appearance and texture. In order to achieve the woody feeling on the surface, most of them use emery or steel wire brushes to polish the bright layer of the surface crust, or use heated metal rollers (the surface of the rollers is engraved). There are imitation wood grains) rolling the surface of wood-plastic materials,...

AI Technical Summary

Problems solved by technology

However, most of the PE wood-plastic composite materials on the market now have a single appearance and texture. In order to achieve the woody feeling on the surface, most of them use emery or steel wire brushes to polish the bright layer of the surface crust, or use heated metal rollers (the surface of the rollers is engraved). There are imitation wood grains) rolling the surface of wood-plastic materials, etc., to achieve the wood-like effect on the surface of wood-plastic materials. The invention patent of wood-plastic composite material and its preparation method, the publication number is 1935492, which is to obtain the woody surface effect by mechanically "graining" the surface

However, these methods often have great defects. For example, some anti-aging, anti-mildew and other small molecule additives added in the formula are often distributed on the surface of wood-plastic materials during the entire wood-plastic processing process. Removing the bright layer of the crust will cause the loss of these functional additives and affect the expected use effect; and the bright layer of the crust itself is a hydrophobic dense layer. Once removed, the hydrophilic fibers inside the material will directly contact with the environment. Long-term outdoor environment can easily cause water swelling, cracking, water stains, mildew and other phenomena; secondly, surface grinding and rolling wood grain have high requirements on the surface flatness of the material. The surface of this type of wood-plastic material It must be horizontal, and it cannot be designed into a beautiful shape with increased radians, and it is not conducive to the design of functional grooves; moreover, it is difficult to achieve uniformity when using rolled wood grains, and it lacks the layering of natural wood grains. And not wear-resistant, any friction in the process of packaging, transportation, installation, etc., may damage it

In a word, these surface treatment methods all have very big deficiencies.