Irradiation crosslinking halogen-free high flame-retardant cable material and preparation method thereof

Abstract

The invention relates to an irradiation crosslinking halogen-free high flame-retardant cable material and a preparation method thereof. The cable materials comprise the following compositions: 45-90 parts of basic resin, 10-55 parts of functional polyolefine resin, 45-125 parts of carbonate hydroxide flame retardant, 30-50 parts of charing agent, 30-50 parts of flame-retardant lubricant, 0.3-3 parts of methyl silicone rubber shell forming agent, 0.5-2 parts of silane surface modifier, 2-5 parts of crosslinking sensitizing agent, 0.2-2 parts of antioxidant, 1-4 parts of lubricant and 0.1-1.0 parts of initiator. The preparation method of the cable material comprises the following steps of: stirring the carbonate hydroxide flame retardant, the charing agent and the flame-retardant lubricant at a high speed for 2 min; and then adding the shell forming agent and continuously stirring at a high speed until the temperature rises to above 100 DEG C, coating the surface of the mixture with the shell forming agent; adding silane coupling agent and stirring for 5-8 min, and carrying out secondary surface treatment; adding initiator-alcohol solution, and discharging after mixing; extruding and pelletizing; finally drying and cooling to obtain the finished cable material product. The flame retardant performance of the product is obviously enhanced, and the product has good shell forming performance in conbustion without droplets.

Description

technical field [0001] The invention relates to wire and cable materials, in particular to a formulation and preparation method of a radiation crosslinked halogen-free high flame-retardant cable material, which can be widely used in the fields of automobiles, electronics, construction engineering and the like. Background technique [0002] Common flame-retardant wire and cable materials mostly contain halogen flame retardants, which will release a large amount of harmful gas and black smoke when burned, which brings harm to the environment and human health. At present, many countries in the world have introduced laws and regulations to restrict the use of halogen-containing flame retardants in wire and cable materials, and low-smoke halogen-free cable materials will gradually replace halogen-containing cable materials. Low-smoke halogen-free flame-retardant cable materials can be divided into thermoplastic type and cross-linked type. Thermoplastic low-smoke halogen-free cabl...

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Problems solved by technology

[0003] Low-smoke halogen-free cable materials currently mainly use a composite system of polyolefin substrates added with inorganic flame-retardant fillers. The inorganic flame-retardant materials are mainly aluminum hydroxide or magnesium hydroxide, but due to the low flame-retardant efficiency of aluminum hydroxide or magnesium hydroxide , the self-extinguishing effect of the material is poor, it is difficult to pass the VW-1 flame retardant test requirements

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