Special material for wood plastic extrusion foaming and preparation method thereof

Abstract

The invention relates to a special material for wood plastic extrusion foaming in the technical field of high polymer materials. The composite material is mainly compounded by polypropylene, a foaming agent, a blowing promotor, a cross-linking agent, an assistant crosslinker, a compatilizer, a coupling reagent, a nucleating agent and wood powder. The preparation method of the composite material comprises the following steps of carrying out activating treatment on the wood powder, blending the wood powder and polypropylene as well as various addition agents uniformly through a high mixing machine, extruding by a twin screw and foaming once to prepare the material. The special material for polypropylene or wood powder extrusion foaming has the characteristics of light weight, specific strength, waterproofing, anticorrosion and heat preservation, and the prepared product has the processing characteristic that the timber can be nailed, sawed and planed; the special material not only has good mechanical property and thermal property, but also has excellent environmental protection properties such as being recyclable and degradable and the like; the special material can be widely used in fields of construction, transportation and packaging as well as household decoration and daily necessities markets; the special material can be recycled directly, does not damage the surface of the packed objects due to the soft texture of the material, can be used as a packaging material for electrical equipment, computers, cameras and the like, can be used for skin packaging of glass ware, precise workpieces and quick-wear parts, and can substitute for a PS (polystyrene) foam material.

Description

technical field [0001] The invention relates to the technical field of polymer materials, in particular to a special material for wood-plastic extrusion foaming and a preparation method thereof. Background technique [0002] In today's world, environmental protection and rational development and utilization of limited resources have become topics of common concern throughout the world. The concept of circular economy, which takes "reduction, reuse, and recycling" as its operating principle (3R for short), is gradually being valued by the Chinese government. The invention reduces the product density through foaming, thereby achieving the purposes of reducing cost and improving the surface performance of composite materials. [0003] The common problem in PP foaming research is that PP has a high degree of crystallinity. After the temperature reaches the crystal melting temperature, its melt viscosity drops rapidly, making it difficult to maintain the gas generated during the...

AI Technical Summary

Problems solved by technology

[0003] The common problem in PP foaming research is that PP has a high degree of crystallinity. After the temperature reaches the crystal melting temperature, its melt viscosity drops rapidly, making it difficult to maintain the gas generated during the foaming process.