Wood plastic composite material

Abstract

The invention relates to a wood plastic composite material comprising the following materials in parts by weight: 100 parts of wood meals, 20-80 parts of waste plastics, 5-50 parts of waste rubbers, 10-60 parts of high-melt index thermoplastic resins, 1-12 parts of surface active agents, 2-8 parts of lubricating agents, 0.1-4 parts of cross-linking agents, 0.1-4 parts of antioxygens and 0.05-1.5 parts of processing agents, wherein the grain diameter of the wood meals ranges from 10 meshes to 325 meshes; the flow velocity of the high-melt index thermoplastic resins is higher than 20 g / 10 minutes; the cross-linking agents are peroxides, thus the invention improves the dispersibility and the flowability of the wood meals contained in the composite and the compatibility of plastics by adding the high-melt index thermoplastic resins, can not only better utilize the resources, but also enhances the mechanical strength (such as tensile strength, bending strength, impact strength, and the like) of the composite material by adding the waste rubbers, has the advantages of good processing property, low water absorption rate, good stability of products, and the like and is suitable for injection moulding and beneficial to market promotion.

Description

technical field [0001] The invention relates to a wood-plastic composite material formed from waste plastics, waste rubber, thermoplastic resin and wood powder, which can be widely used in making shoe soles, mobile phone protective cases, set-top boxes, handicrafts and toys, anti-slip mats, floors and other fields. Background technique [0002] Wood-plastic composite material refers to a composite material filled with wood fiber or other plant fibers and thermoplastics. The main components are plastic and wood fiber; today, wood-plastic composite material is a new type of material between wood and plastic. , which has a series of special properties superior to wood and plastic, especially recyclable waste plastic or wood as raw materials, so it is widely used in many fields; traditional wood-plastic composite materials can be found in Chinese Patent Application No. 89107412.0 The disclosed technology mainly mixes waste rubber, waste plastics and wood powder in a certain prop...

AI Technical Summary

Problems solved by technology

[0002] Wood-plastic composite material refers to a composite material filled with wood fiber or other plant fibers and thermoplastics. The main components are plastic and wood fiber; today, wood-plastic composite material is a new type of material between wood and plastic. , which has a series of special properties superior to wood and plastic, especially recyclable waste plastic or wood as raw materials, so it is widely used in many fields; traditional wood-plastic composite materials can be found in Chinese Patent Application No. 89107412.0 The disclosed technology mainly mixes waste rubber, waste plastics and wood powder in a certain proportion. Obviously, the strength of the finished product is limited, which is not conducive to processing and production; with the continuous expansion of the application field of wood-plastic composite materials and processing With the continuous advancement of technology, in order to overcome the difficulties in the wood-plastic processing process and produce wood-plastic composite materials with good performance, the key is how to modify the surface of wood powder and plastic, the content of wood powder and different additives. Improve the compatibility of the wood-plastic interface to improve the tensile strength, flexural strength, impact strength, expansion rate and other properties of the product; for example, the composition for plastic composite materials disclosed in Chinese patent 98122121.1, which includes organic matter such as wood powder Fillers, polyolefin thermoplastics, and hot-melt adhesives composed of peroxide initiators and polar monomers, but the fluidity of the system has certain limitations, and the expansion rate is high, and the mechanical properties added are limited. Therefore, how to improve the interfacial compatibility between wood fibers and plastics in composite materials has gradually become an urgent issue in the industry.

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