Wood-plastic composite material prepared from waste and old plastic mixer and preparation method thereof

Abstract

The invention relates to a wood-plastic composite material which is prepared by waste-old plastic mixture and a process for preparation, which relates to a wood-plastic composite material and a process for preparation. The invention solves the problems that the mechanical properties of the wood-plastic composite material which is prepared by the existing waste-old plastic mixture are bad and the like. The wood-plastic composite material is prepared by wooden fiber material, modified waste-old plastic blend and lubricating agent. the process for preparing comprises preparing modified waste-oldplastic blend, and then mixing the wooden fiber material, the modified waste-old plastic blend and the lubricating agent, and further adopting a continuous extrusion modeling technique, at last, getting wood-plastic composite material. Compared with the prior art, the bending strength of the wood-plastic composite material of the invention is improved by 30%-60%, and the impact strength is improved by 58%-140%. The process for preparing the wood-plastic composite material of the invention not only has simple technique and high production efficiency, but also reinforces the interface combination of the modified waste-old plastic blend and wooden fiber material, and the invention improves the mechanical properties of wood-plastic composite material.

Description

technical field [0001] The invention relates to a wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a new type of material formed by combining plastic with wood, bamboo, straw and other lignocellulosic materials. It has the dual performance advantages of plastic and wood materials. When waste plastics and wood processing residues or straw are used as the main production raw materials, wood-plastic composite materials have outstanding advantages in resource utilization and environmental protection, so they have developed rapidly in developed countries. [0003] In order to ensure the stability of the production process and the necessary product performance, the current international actual production usually uses a single sorted waste plastic (such as polyethylene or polypropylene) as processing raw materials. However, in developing countries, especially China, recycled waste plastics are usuall...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the poor mechanical properties of wood-plastic composites prepared from waste plastic mixtures. The preparation method causes the modified plastic blends to lose active anhydride groups, which reduces the interfacial bonding with wood powder, and a large amount of The free radical initiator is consumed or adsorbed by the pores of the lignocellulosic material, which hinders the effective progress of the plastic grafting reaction, the modification effect is poor, and the graft monomer maleic anhydride cannot fully react, causing pollution and other problems. Wood-plastic composite material prepared from waste plastic mixture and preparation method thereof