Fireproof flame-retardant cable and preparation method thereof

Abstract

The invention relates to the technical field of wires and cables, in particular to a fireproof flame-retardant cable and a preparation method thereof. The fireproof flame-retardant cable comprises thefollowing components: polyvinyl chloride resin, a compatilizer, an antioxidant, a lubricant, aluminum hydroxide powder, modified nano silicon dioxide and resorcinol bis (diphenyl phosphate). The preparation method of the modified nano silicon dioxide comprises the following steps: adding the nano silicon dioxide into absolute ethyl alcohol, stirring, and adding the silane coupling agent for modification to obtain the modified nano silicon dioxide. The preparation method of the fireproof flame-retardant cable comprises the following steps: mixing polyvinyl chloride resin, resorcinol bis (diphenyl phosphate), modified nano silicon dioxide and aluminum hydroxide powder, adding the antioxidant, the compatilizer and the lubricant, mixing, and carrying out extrusion granulation to obtain a cable material; melting and extruding the cable material, coating the surface of the wire with the cable material, cooling and curing. According to the invention, the addition amount of the inorganic flame retardant in the cable material is reduced while the heat resistance and flame retardance of the cable material are not influenced, and the mechanical properties of the prepared cable are not influenced.

Description

technical field [0001] The present application relates to the technical field of wires and cables, in particular to a fire-resistant and flame-retardant cable and a preparation method thereof. Background technique [0002] With the development of my country's petrochemical, communication, transportation, construction, electric power and other industries, the demand for cables in power plants, substations, smelting and petrochemical industries has been extremely high in recent years, and at the same time higher requirements have been put forward for the performance and quantity of cables. Therefore, the materials used to make cables are gradually high-grade, specialized and specialized. Cables are not only required to have excellent physical properties, such as tensile strength, elongation at break, etc., but also need to have good flame retardancy and impact resistance. [0003] In the related technology, the addition amount of magnesium hydroxide and aluminum hydroxide in t...

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Problems solved by technology

[0003] In the related technology, the addition amount of magnesium hydroxide and aluminum hydroxide in the cable material reaches more than 50%, so that the cable material can achieve a better flame retardant effect. When the addition amount of the inorganic flame retardant is too high, the inorganic flame retardant The dispersion in the matrix is ​​unstable. If the addition of magnesium hydroxide and aluminum hydroxide in the cable material is reduced, the flame retardancy of the cable will be reduced

[0004] In view of the related technologies mentioned above, the inventor believes that although a large amount of addition of inorganic flame retardants can increase the flame retardant performance of the cable, it has a great impact on the mechanical properties of the cable and affects its service life.

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