Method for producing macromolecule composite wood-plastic material by utilizing crop straw

Abstract

The invention provides a process for producing high molecular composite wood-plastic materials by using straws of agricultural plants, belonging to a process for utilizing the straws of agricultural plants. The process is that the straws of agricultural plants are crushed and dried, then the achieved straw powder is processed soakage treatment, and then modified straw powder is achieved after being dried, further dry powder is achieved by processing high-speed mixing and cooling mixing to the modified straw powder and other raw materials of which the plastic is the main material, and then the dry powder is squeezed out to produce grains, the materials after producing grains are squeezed out and shaped, consequently high molecular composite wood-plastic materials are manufactured. Owing to the process of the high molecular composite wood-plastic materials, the sound adhesion between the plant fibers existed in the straw powder after being processed superficial treatment by a plurality of modifiers, and plastics can be truly realized and the perfect property of materials can be achieved.

Description

technical field [0001] The invention provides a method for utilizing agricultural plant stalks, in particular a method for producing a polymer composite wood-plastic material by combining agricultural plant stalks with a polymer material such as plastic. Background technique [0002] my country is a country with poor timber resources, the forest coverage rate is only 12.7%, and the per capita forest stock volume is 10 cubic meters. A large amount of timber needs to be imported every year. With the advancement of environmental protection policies, my country's timber resources have shifted from natural forests to artificial forests, and the original large-diameter timber resources have declined sharply. Therefore, wood-recombined products have become an important supplement to the current timber resources and an important development direction for the utilization of timber resources in my country. However, there are four major defects in wood recombined products such as fibe...

AI Technical Summary

Problems solved by technology

However, there are four major defects in wood recombined products such as fiberboard, high-density board, woodworking board, and particle board widely used in the market at present: First, the compatibility between untreated wood fiber and plastic is poor, and the combination of plastic and plant fiber is not tight. This leads to a decline in material quality; second, the wood effect is not ideal; third, a large amount of phenolic resin is used as an adhesive, which causes the product to release a large amount of formaldehyde, which is harmful to human health; fourth, it still consumes a large amount of wood resources, restricting the development space of the product

The current production process of polymer composite wood-plastic materials only pays attention to the mixing or reuse of several materials, and the improvement of basic mechanical properties, without fully considering the compatibility and interface bonding of various materials, interface bonding ability and various The diffusion and penetration of materials at the interface cannot ensure that the plant fibers can be fully dispersed in the polymer resin. The wood / plastic interface interaction is poor, the affinity between the two is low, and the bonding strength is low. Therefore, the mechanical properties of polymer composite wood-plastic materials Low performance and other usability