Bright and injection-molding wood plastic composite and method for preparing the same

Abstract

The invention discloses a bright and injection-molding wood plastic composite and method for preparing the same and belongs to a wood plastic composite and a method for preparing the same. The wood plastic composite comprises the following components in percentage by mass: 50 to 70 percent of renewable PP or HDPE, 30 to 50 percent of wood powder, 5.0 to 10.0 percent of nanometer absorbent, 5.0 to 10.0 percent of surfactant, 1.0 to 2.0 percent of super lubricant, 1.0 to 2.0 percent of titanate coupling agent, 0.5 to 5.0 percent of polyethylene wax, 2.0 to 5.0 percent of stearic acid or stearate, and 5.0 to 15 percent of maleic anhydride-grafted PE or PP grafted with a molecular weight of between 5,000 and 30,000. The wood powder and the nanometer absorbent are mixed at a high rotation speed of 1,500 to 2,500 r / m for 10 to 15 minutes, then the titanate coupling agent is added and mixed at a high rotation speed of 1,500 to 2,500 r / m for 5 to 6 minutes, and finally other components are added to be mixed at a rotation speed of 1,500 to 2,500 r / m for 20 to 30 minutes and then mixed at a rotation speed of 300 to 600 r / m for 5 to 10 minutes so as to obtain the premix. The premix is extruded and pelletized by an extruder to obtain the bright and plastic injection wood plastic composite. The wood plastic composite has the advantages of high surface glossiness, excellent high-temperature flow performance, high strength and toughness, low cost and the like, can widely substitute plastics and is used for production of products with complex shapes.

Description

technical field [0001] The invention relates to a bright type injectable wood-plastic composite material and a preparation method, specifically an injection-grade wood-plastic composite material and a preparation method. Background technique [0002] At present, the molding process of wood-plastic composite materials at home and abroad mainly has the following two methods. [0003] 1. Extrusion molding [0004] The plastic particles, wood flour and additives are mixed and sent to the extruder for melt blending and extrusion molding. This process can only form profile products with a certain cross-sectional shape. [0005] 2. Molding [0006] The plastic particles are first mixed with wood powder and additives, and then sent to an extrusion granulator for granulation to prepare wood-plastic particles. Then the wood-plastic particles are filled into the closed mold, heated and pressurized to shape. The main problem is that it can only form plate products with simple shape...

AI Technical Summary

Problems solved by technology

[0010] What the present invention is to solve is how to reduce or eliminate the moisture in wood powder, so that it can be used in the production of injection-molded wood-plastic composite materials, and improve the existing wood-plastic composite materials with poor surface finish, low strength, high brittleness, and incapability of injection molding. And other issues