Wood-plastic composite material preparation method

Abstract

The invention discloses a wood-plastic composite material preparation method. The method comprises the following steps that 1, wood flour and nano calcium oxide powder are mixed by mass at the high speed of 1700-2300 rpm for 15-18 minutes; 2, after silane and a titanate coupling agent are added by mass, mixing is conducted at the high speed of 1700-2300 rpm for 6-8 minutes; 3, polyvinyl chloride,light activated calcium carbonate, azodicarbonamide, organic tin, polyethylene wax, chlorinated polyethylene, nano zinc oxide, a silicone processing auxiliary and inorganic nanoparticles are added inparts by mass, and after mixing is conducted at the high speed of 1700-2300 rpm for 15-25 minutes, mixing is conducted at the low speed of 300-500 rpm / min for 7-12 minutes to obtain a premix; 4, the premix is extruded through a conical double-screw extruder for foaming, forming, fast cooling setting through 0-15 DEG C circulating water, drawing and cutting are sequentially carried out. By means ofthe method, the defect of the compatibility of the wood flour and a resin matrix can be overcome, and compounding of the wood flour and the resin matrix is facilitated.

Description

technical field [0001] The invention relates to a method for preparing a polymer composite material, in particular to a method for preparing a wood-plastic composite material. Background technique [0002] Wood-plastic composite board is a kind of composite material composed of wood powder and resin matrix, which can realize the large-scale utilization of wood powder. However, the wood powder and the resin matrix are difficult to be compatible. On the other hand, the large amount of water in the wood powder also makes it difficult to compound the wood powder and the resin matrix, making it difficult to prepare wood-plastic composite boards. Contents of the invention [0003] Aiming at the deficiencies of the prior art, the invention proposes a wood-plastic composite material preparation method capable of overcoming the compatibility defects of wood powder and resin matrix and promoting the compounding of wood powder and resin matrix. [0004] The present invention achieve...

AI Technical Summary

Problems solved by technology

However, wood powder and resin matrix are difficult to be compatible. On the other hand, a large amount of water in wood powder also makes it difficult to compound wood powder and resin matrix, making it difficult to prepare wood-plastic composite boards.