Anti-cracking type high-flame-retardance low-smoke halogen-free material for optical cable as well as preparation method and application thereof

Abstract

The invention discloses an anti-cracking type high-flame-retardance low-smoke halogen-free material for an optical cable. The high-flame-retardance low-smoke halogen-free material is prepared from thefollowing ingredients in parts by weight: 18 to 20 parts of EVA resin, 3 to 5 parts of POE resin, 12 to 15 parts of metallocene catalysis linear low-density polyethylene, 5 to 7 parts of maleic anhydride grafted polyethylene, 0.3 to 0.5 part of antioxidants, 30 to 50 parts of magnesium calcium carbonate, 5 to 8 parts of char-forming agents and 0.5 to 1 part of organosilicone flame retardants. Theanti-cracking type high-flame-retardance low-smoke halogen-free material for the optical cable as well as a preparation method and application thereof have the advantages that the optical cable can be used in outdoor environment; the external package is thick; some mechanical characteristics and environment characteristics such as pressure resistance, corrosion resistance and tensile performanceare realized; the mechanical performance and the flame retardant performance of the product can be simultaneously improved.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a crack-resistant, highly flame-retardant, low-smoke, halogen-free material for optical cables, a preparation method and application thereof. Background technique [0002] Wires, cables and optical cables are responsible for the transmission of energy and information, and are an indispensable part of the national economy and daily life. In my country, the output value of the cable industry exceeds one trillion yuan. It is one of the largest supporting industries in the national economy and the second largest industry after the automobile industry. With the application of optical cables more and more widely, the laying becomes more and more intensive, and more and more fires are caused due to the aging and damage of the sheath. In order to reduce the incidence of fire and the death rate of fire, lower Smoke, halogen-free, flame retardant, and environmental protection have become t...

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Problems solved by technology

[0003] At present, low-smoke, halogen-free retardant fuels are developing rapidly, but there are still some problems. For example, the traditional low-smoke, halogen-free retardant fuels have unsatisfactory flame-retardant effects, and the mechanical properties of the sheath cannot meet the laying conditions of optical cables. question

This is because the traditional flame retardant system mainly uses inorganic alkali metal hydroxides. This type of flame retardant has a large content and low flame retardant effect. At the same time, it has a negative impact on the mechanical properties of the product, and it is difficult to meet customer requirements Requirements for mechanical properties and flame retardant properties of products

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