Method for improving the impact resistance of thin-wall flame-retardant wire cable material

Abstract

The invention belongs to the technical field of flame-retardant wire and cable processing, in particular to a method for improving the impact resistance of a thin-wall flame-retardant wire cable material. The preparation method comprises the following steps: preparing a nano calcium carbonate composite material, preparing materials, mixing the raw materials, granulating and aging. Compared with the prior art, the preparation method has the following advantages that the preparation of the nano calcium carbonate composite material reduces the agglomeration tendency, the middle material is compounded with acrylonitrile-butadiene-styrene copolymer and then is compounded with high-polymerization-degree ammonium polyphosphate at the same time, so that the tensile strength and the flame retardancy of the obtained composite material are obviously improved, the resin raw materials with different performances are cooperated, and then aging is carried out after the electric wire and the cable material are prepared, and a sample strip with the thickness of 0.6 mm is produced, detection is carried out, and the surface of the wire rod after mechanical scraping is not white, the acid and alkali resistance is good, the flexibility and impact resistance are relatively good, the environment-friendly and flame-retardant effects are achieved, and poisonous black smoke cannot be generated during combustion, and the flexibility and processability are good.

Description

technical field [0001] The invention belongs to the technical field of processing flame-retardant wires and cables, and in particular relates to a method for improving the impact resistance of thin-walled flame-retardant wires and cables. Background technique [0002] In recent years, the demand for the cable industry will continue to grow. The wires and cables widely used in energy transmission and information transmission are made of polymer composite materials, which are extremely flammable, and the wires and cables are heated during energy transmission or caused by external fires. However, it is very easy to cause combustion, thus causing a fire. With the increasingly strict requirements on the environmental safety and use safety of flame-retardant products, the development and use of low-smoke halogen-free flame-retardant materials has become one of the research and development directions of domestic and foreign wire and cable. 1. However, the existing low-smoke, haloge...

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Problems solved by technology

[0002] In recent years, the demand for the cable industry will continue to grow. The wires and cables widely used in energy transmission and information transmission are made of polymer composite materials, which are extremely flammable, and the wires and cables are heated during energy transmission or caused by external fires. However, it is very easy to cause combustion, thus causing a fire. With the increasingly strict requirements on the environmental safety and use safety of flame-retardant products, the development and use of low-smoke halogen-free flame-retardant materials has become one of the research and development directions of domestic and foreign wire and cable. 1. However, the existing low-smoke, halogen-free flame-retardant treatment technologies in China are limited to reduce the surface temperature of the material through the vaporization of aluminum hydroxide and magnesium hydroxide under high temperature conditions, so as to meet the requirements of flame retardancy, which requires comparison. A large amount of filling can achieve a certain flame retardant effect, and the flame retardant of this method cannot achieve the flame retardant effect on materials that maintain long-term external heat source heating; PVC materials have good rigidity, high strength, and flame retardant , corrosion resistance, good electrical insulation, good processing performance, and low price, so it is widely used in the cable material industry. Usually, automotive wires and cables are different from ordinary wires and cables. They are specially used for automobiles. Because the interior of the automobile is a very complicated There are various complex conditions such as vibration, friction, oil pollution, high heat, cold and electromagnetic radiation, etc., so the automotive wires are required to have functions such as heat resistance, cold resistance, wear resistance, odorlessness and anti-interference. The main indicators of wire and cable materials, with the gradual increase of technical requirements, the wall thickness of automotive cables gradually decreases, so how to improve the impact resistance of flame retardant and insulating wire and cable materials needs further research