LDPE (Low-Density Polyethylene)/EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material and preparation method thereof

Abstract

The invention relates to an LDPE (Low-Density Polyethylene) / EVA (Ethylene Vinyl Acetate Copolymer) anti-flaming material. The LDPE / EVA anti-flaming material comprises the following raw material compositions by weight parts: A is base resin and includes 100 parts of LDPE and EVA; B is bromine containing flame retardant and includes 10-20 parts of decabromodiphenyl ethane or decabromodiphenyl ether, C is inorganic flame retardant and includes 3-6 parts of modified antimonous oxide M-Sb2O3, 3-6 parts of talcum powder TP, 2-8 parts of zinc borate (ZB) and 2-8 parts of hydrotalcite (LDHs). The preparation method of the LDPE / EVA anti-flaming material is as follows: drying raw materials, mixing the raw materials uniformly, processing, extruding, and conducting injection molding on the raw materials to obtain the extruded anti-flaming composite material. According to the anti-flaming material and the preparation method, the advantages of the organic flame retardant, the bromine containing flame retardant and the inorganic flame retardant are combined, the using amount of the inorganic flame retardant is decreased, the limit oxygen index of the anti-flaming composite material is increased, the materials are burned into carbon directly when being burned, the dropping phenomenon can not occur, and the toxic and harmful gas can not be generated.

Description

technical field [0001] The invention belongs to the technical field of composite materials, and in particular relates to an LDPE / EVA flame-retardant composite material and a preparation method thereof. Background technique [0002] LDPE has a wide range of uses due to its excellent physical and mechanical properties, electrical properties and chemical corrosion resistance, especially good processing properties. Due to the poor flame retardancy of LDPE (OI=17), it is difficult to greatly increase its antioxidant index (OI), and LDPE is a non-polar material, which is soluble in flame retardants with strong polarity. The polar parameters are very different, so it must be modified. The modification method is mainly to introduce polar groups, such as ethylene-vinyl acetate copolymer (EVA), ethylene-ethyl acrylate copolymer (EEA), etc., The purpose is to increase the filling amount of flame retardant. [0003] Ethylene-vinyl acetate copolymer EVA has good flexibility, toughness,...

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to overcome the problems of high toxicity and dripping caused by burning in the existing flame retardants, and to provide a flame-retardant composite material containing LDPE / EVA and its preparation method, using LDPE / EVA as the base resin, adding bromine It is a flame retardant and an inorganic flame retardant. While combining the advantages of these three types of flame retardants, it does not produce dripping when the material is burned.

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