Formula and method for preparing polyvinyl chloride based wood-plastic composite material

Abstract

The invention relates to a formula and a method for preparing a polyvinyl chloride based wood-plastic composite material. The method comprises the following steps of: adding raw materials prepared according to the formula such as waste polyvinyl chloride granules, wood flour, carboxylated nitrile rubber, powdered nitrile rubber, a compound stabilizer, a lubricant and a flow modifier into a high-speed mixer, and stirring the raw materials for 15 to 20 minutes, wherein the mixing temperature is between 100 and 150 DEG C; adding the mixed raw materials into an extruding machine to perform extrusion, wherein the rotating speed of a main engine of the extruding machine is 40 to 60 revolutions per minute, and the rotating speed of a feeding machine is 4 to 6 revolutions per minute; and performing shaping after the extrusion. The polyvinyl chloride raw material adopted by the formula and the method is waste polyvinyl chloride, and the wood flour is worthless poplar wood flour, miscellaneous tree powder or crop straw powder, and is low in price, saves energy sources and protects the environment.

Description

technical field [0001] The invention relates to a preparation formula and method of a polyvinyl chloride (PVC)-based wood-plastic composite material. The prepared composite material can be used for flooring, guardrails, decorative materials and the like. The invention belongs to the technical field of polymer processing. Background technique [0002] Wood-plastic composite material is a new type of composite material prepared by mixing and processing thermoplastics as the main raw material, adding wood powder, bamboo powder, fruit shell powder, straw powder, rice bran powder or peanut shell powder. The successful development of this material has alleviated the shortage of resources and energy caused by the increasing demand for petroleum resources and wood and forest products. It is an effective means of protecting the environment and saving energy. Good dimensional stability, easy molding, low water absorption, corrosion resistance and recyclability, so it has become a hot...

AI Technical Summary

Problems solved by technology

[0003] At present, some wood-plastic composite materials are produced based on polyvinyl chloride thermoplastics, such as: CN200810077149.0 patent, this kind of wood-plastic materials, due to the inherent poor cold resistance and low impact strength of polyvinyl chloride The characteristics of poor performance, coupled with the use of recycled polyvinyl chloride, the performance has dropped a lot, and a large amount of wood powder fibrous substances are filled, which further deteriorates the performance of wood-plastic materials.