Polyethylene material with high flame resistance

Abstract

The invention belongs to the technical field of polyethylene materials and particularly relates to a flame-resistant polyethylene material with a good tensile strength and a high breaking elongation rate and a preparation method thereof. The polyethylene material comprises the following components in parts by mass: 20-40 parts of high density polyethylene (HDPE), 50-100 parts of ethylene-vinyl acetate copolymer (EVA), 40-70 parts of magnesium hydroxide, 5-15 parts of surfactant, 8-20 parts of red phosphorus, 5-20 parts of silicane cross-linking agent, 1-5 parts of lubricant and 1-3 parts of antioxidant. The preparation method provided by the invention comprises the specific steps of: mixing the high density polyethylene and the ethylene-vinyl acetate copolymer with the Mg(OH)2, the red phosphorus and the surfactant and simultaneously adding the silicane cross-linking agent, and fully mixing the mixture; adding the lubricant, the antioxidant, dispersant and the like into the blended materials, and pelleting the blended materials by extruding from an extruder at a temperature of 120-250 DEG C; and drying to obtain the finished product. The polyethylene material prepared by the invention not only has a good flame resistance, but also has good tensile strength and high breaking elongation rate.

Description

technical field [0001] The invention belongs to the technical field of polyethylene materials, and in particular relates to a flame-retardant polyethylene material with excellent tensile strength and elongation at break and a preparation method thereof. Background technique [0002] Polyethylene is an important general-purpose resin with a wide range of uses. Its products can be seen everywhere from wires and cables, sheathing materials, films, pipes, daily necessities, etc., but polyethylene is a flammable material, especially in high-pressure, heat sources, etc. Under certain conditions, its oxygen index is 17.3. When burning, it has a large release rate, high calorific value, fast flame propagation speed, and decomposes to produce carbon monoxide. [0003] Halogenated flame retardants have excellent flame retardant properties and have been widely used. However, when a fire occurs, such halogen-containing flame-retardant materials will produce a large amount of smoke and ...

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Problems solved by technology

[0005] The object of the present invention is to solve the problem of conflicting flame-retardant properties and mechanical properties of existing polyethylene materials, and to provide a flame-retardant polyethylene material with high barrier properties and its The preparation method, the prepared polyethylene material has good flame retardancy, and at the same time has a high system tensile strength and elongation at break

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