High-efficiency flame retardant wood plastics composite and preparation method thereof

Abstract

The invention discloses a high-efficiency flame retardant wood plastics composite. The high-efficiency flame retardant wood plastics composite is prepared from 50 to 75 weight parts of wood powder, 10 to 30 weight parts of plastic resin, 1 to 5 weight parts of interfacial compatibilizer, 0.5 to 2 parts of impact modifier, 1 to 3 weight parts of lubricant, 1 to 5 weight parts of other functional aid, and 10 to 30 weight parts of flame retardant. The preparation method comprises the following steps of: degreasing and drying wood powder, organically modifying bentonite and zinc borate and mechanically grinding, mixing in a high-speed mixing machine to obtain premix, and mixing and plasticizing in a double-roll plasticator and performing compression molding. The bentonite and the zinc borate which are treated organically and aluminum hydroxide are compounded to form a novel fire retardant, the mechanical property of the material is kept, the flame retardant effect of the wood plastics composite is improved and the using amount of the aluminum hydroxide is greatly reduced; and the bentonite and the zinc borate are organically ultrafined, the problem that an inorganic additive is not easily compatible with other components so as to influence the mechanical property of the composite is solved and the flame retardant requirement of the wood plastics composite is met.

Description

technical field [0001] The invention belongs to the technical field of wood-plastic composite materials, and in particular relates to a high-efficiency flame-retardant wood-plastic composite material and a preparation method thereof. Background technique [0002] The main raw materials of wood-plastic composite materials are agricultural and forestry wastes and waste plastics, and their products are mainly used as substitutes for wood. The development of wood-plastic composite materials is of great significance to the comprehensive utilization of waste, environmental protection and relief of the increasing pressure on natural wood. [0003] In recent years, wood-plastic composite materials have attracted more and more attention due to their good processing performance, mechanical properties and price advantages, especially the excellent woody feeling. PVC resin itself is a flame retardant material, but due to the addition of wood fibers, the flammability of the material is ...

AI Technical Summary

Problems solved by technology

However, when aluminum hydroxide is used as a flame retardant, the addition amount is relatively large, usually up to 40%. When the amount is large, it will inevitably lead to poor fluidity of the logistics during resin mixing and molding, affecting the processing performance and mechanical properties of the material, making it Difficulty forming the material

Mg(OH) 2 Although the flame retardant effect is better than that of aluminum hydroxide, it has poor acid resistance and will dissolve quickly in acid

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