Styrene-based non-halogen flame-retardant injection-grade wood-plastic composite material and preparation method thereof

Abstract

The invention discloses a styrene-based non-halogen flame-retardant injection-grade wood-plastic composite material and a preparation method thereof. The wood-plastic composite material comprises the following components by mass percentage: 25% to 60% of styrene-based resin, 5% to 50% of vegetable fiber, 0.5% to 20% of compatibilizer, 0% to 30% of toughener, 0.5% to 8% of dispersant, 5% to 40% offlame retardant and flame-retardant synergist and 0% to 1% of antioxidant. Compared with the existing wood-plastic composite material, the styrene-based non-halogen flame-retardant injection-grade wood-plastic composite material prepared by the invention has the characteristics of simple production procedure, lower flame-retardant consumption, good non-halogen flame-retardant effect and wide range of forming manners. Therefore, the invention is suitable for various injection-molded parts, such as the housing of electrical products, furnishings, automobile materials, artworks, complex-structured building products and the like.

Description

technical field [0001] The invention relates to the field of wood-plastic composite materials, in particular to a styrene-based halogen-free flame-retardant injection molding-grade wood-plastic composite material and a preparation method thereof. Background technique [0002] Wood-plastic composite material is a new type of environmentally friendly material prepared by using plant fiber and thermoplastic resin as the main raw materials and adding certain processing aids. This material can alleviate the consumption of petroleum, and at the same time, a large amount of waste plant fibers and recycled plastics are used, which can not only alleviate the consumption of petroleum resources in modern society, but also reduce the consumption of wood resources. It is an effective means to protect the environment and reduce energy consumption. [0003] In view of the many advantages of wood-plastic composite materials, its market has grown rapidly in recent years, especially in interi...

AI Technical Summary

Problems solved by technology

Therefore, it is an inevitable trend to research and develop halogen-free flame-retardant wood-plastic composite materials. Chinese patent application 200610039985.4 discloses a flame-retardant wood-plastic composite material and its preparation method, using intumescent flame retardant ammonium polyphosphate and carbon forming agent Flame-retardant modification of polypropylene or polyethylene-based wood-plastic composite materials with foaming agents, etc., but there are disadvantages such as large amount of flame retardants, ammonium polyphosphate is easy to decompose at processing temperature, and the product is easy to absorb moisture; Chinese patent application 200710072794.2 discloses a flame-retardant and smoke-suppressing wood-plastic composite material, which also uses intumescent flame retardant ammonium polyphosphate, starch, etc. to modify polystyrene or polyvinyl chloride, and still exists as an intumescent flame retardant The above shortcomings; in addition, Chinese patent application 200710173607.X discloses a halogen-free flame-retardant wood-plastic composite material and its preparation method. Soak the cellulose material after the agent, and then prepare the halogen-free flame-retardant wood-plastic composite material, because it still uses the intumescent flame retardant, and the step of processing the fiber is added separately, so its practicability is greatly reduced

[0005] In addition, the existing wood-plastic preparation technology is mainly based on extrusion molding, hot pressing molding and extrusion molding technology, which are mainly used for the production of plate products. The injection molding parts with complex molding structures are greatly restricted. The main problem is It is due to the poor fluidity of the wood-plastic composite material with a large amount of wood powder, the low strength of the part, and the poor appearance quality

Although Chinese patent application 200710020012.7 discloses injection molding grade wood-plastic composite material and processing technology, the melt flow rate range of the wood-plastic composite material prepared by it is only 0.3-1.0g / 10min, and can only be used for polypropylene, high Density polyethylene or polyvinyl chloride, its practical application range is very limited

[0006] On the basis of the existing composite material preparation equipment, the flame-retardant treatment of plant fibers is carried out through the fuel injection system of the high-mixer, which makes industrial production consistent and operable, and the organic phosphorus flame There are few reports on flame retardant modification of composite materials