Method for preparing polyethylene-based wood-plastic composite material by using straws

Abstract

The invention discloses a method for preparing a polyethylene-based wood-plastic composite material by using straws. The method comprises the steps of weighing raw materials, namely straw powder, linear low-density polyethylene, isopropyl benzene hydroperoxide, dibutyl tin diacetate, organosilane, dibutyl maleate and dibasic lead stearate, according to the following mass ratio of (10-50): (30-60): (0.05-2): (0.02-2): (10-15): (2-8): (0.3-4.5), uniformly mixing the raw materials in a high-speed stirrer so as to prepare a mixed material, then, reacting and extruding in a twin-screw extruder so as to prepare an extruded material, and pressing a die containing the extruded material on a plate vulcanizing machine, thereby preparing the polyethylene-based wood-plastic composite material. According to the method disclosed by the invention, the operation is simple, the waste is utilized, and large-scale popularization and application are facilitated; the prepared polyethylene-based wood-plastic composite material is non-toxic and environment-friendly, is excellent in comprehensive performance and easy in processing and can replace the traditional timber, thereby having a broad application prospect.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic composite material preparation, and in particular relates to a method for preparing polyethylene-based wood-plastic composite material from straw. Background technique [0002] Wood-plastic composite materials contain wood powder and hot-melt plastic raw materials. The hot-melt plastic raw materials can be industrial or domestic waste materials. Straw is an important agricultural waste with a huge amount. It can be used for wood-plastic composite after crushing. The material is wood flour. From the perspective of production raw materials, wood-plastic products slow down and avoid the pollution of plastic waste, and also avoid the environmental pollution caused by straw stacking and incineration. At the same time, composite materials have both the advantages of wood and plastic: ①Good processing performance. Wood-plastic composites contain plastics and fibers, so they have processing propert...

AI Technical Summary

Problems solved by technology

At present, there are about 1Mt of recyclable waste in society every year in our country, about 0.2Mt is actually used, and 0.8Mt is not recycled. Most of the waste is disposed of in landfill, which not only causes secondary pollution. Secondary pollution, also caused extreme waste of materials