Low-smoke halogen-free flame-retardant cable material

Abstract

The invention provides a low-smoke halogen-free flame-retardant cable material, which is prepared from the following raw materials in parts by weight: 15 to 35 parts of an ethylene-vinyl acetate copolymer, 8 to 25 parts of linear low-density polyethylene, 8 to 25 parts of ethylene-olefin copolymer, 10 to 35 parts of maleic anhydride grafted linear polyethylene, 0.6 to 5 parts of a lubricant, 0.1 to 3 parts of an antioxidant, and 8 to 25 parts of modified porous flake-like nanometer magnesium hydroxide. According to the low-smoke halogen-free flame-retardant cable material of the invention, thetraditional nano magnesium hydroxide is replaced with the porous flake-like nano magnesium hydroxide as an inorganic flame retardant, so that the heating area of nano magnesium hydroxide particles iseffectively increased, the rate of thermal decomposition is accelerated, and the flame retardant efficiency of the nano magnesium hydroxide is improved; in addition, nano polyacrylate is adopted to modify the surface of porous nano magnesium hydroxide, so as to weaken the hydrophilicity of the surface of the nano magnesium hydroxide, reduce the surface energy thereof, and enable the nano magnesium hydroxide to be evenly distributed in matrix resin, thereby effectively improving the mechanical properties and flame retardant properties of the material.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a low-smoke, halogen-free, flame-retardant cable material. Background technique [0002] Flame retardants, also known as flame retardants, fire retardants or fire retardants, are additives that impart flame retardancy to flammable polymers, and can improve the flame retardancy, self-extinguishing or smoke suppression of flammable or combustible materials. Some highly efficient organic halogen-containing flame retardants in traditional flame retardants are incomparable to other flame retardants, but their harm to the environment and human beings cannot be ignored. Therefore, with people's increasing awareness of environmental protection, safety and health, countries around the world have begun to focus on research, development and application of environmentally friendly flame retardants to replace flame retardants that threaten the environment and humans, thus making non-toxic, The...

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Problems solved by technology

However, due to the small particle size and large specific surface of nano-magnesium hydroxide, its surface contains a large number of hydrophilic groups, which has strong water absorption and is prone to agglomeration, so that its compatibility with the body resin is poor, resulting in high molecular weight. The mechanical properties of the material are affected, which limits its application in polymer materials; in addition, the flame retardant efficiency of magnesium hydroxide is poor, and its addition needs to be particularly high to give the flame retardant material the ideal flame retardant performance, but Excessive addition will inevitably lead to a decrease in the mechanical properties and processing properties of the material, affecting the performance of the material

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