Low-smoke halogen-free flame-retardant insulating material for cable

Abstract

The invention discloses a low-smoke halogen-free flame-retardant insulating material for cables, which comprises 60-66 parts of ethylene propylene diene monomer rubber material, 35-40 parts of EVA rubber material, 5-8 parts of a silane coupling agent, 8-12 parts of filler, 1-3 parts of aluminum nitride, 2-4 parts of nano molybdenum disulfide, 20-30 parts of aluminum hydroxide, 15-30 parts of ammonium polyphosphate, 12-18 parts of liquid silica gel, 6-9 parts of ammonium hydrogen oxalate, 5-10 parts of nylon fibers, 4-6 parts of a vulcanizing agent, 7-14 parts of an anti-aging agent, 6-7 parts of a foaming agent and 2-3 parts of a foam stabilizer. The ethylene-propylene-diene monomer rubber material and the EVA rubber material are compounded to serve as a base material and matched with various reinforcing materials and flame-retardant materials, so that the cable material has good flame-retardant insulating property, high heat resistance and wear resistance and the service life is greatly prolonged. The invention also provides a processing technology, by which the overall performance of the flame-retardant insulating material is greatly improved, and the product is easy to popularize and use.

Description

technical field [0001] The invention relates to the field of insulating materials for cables, in particular to a low-smoke, halogen-free, flame-retardant insulating material for cables. Background technique [0002] Insulating materials for cables are generally required to have excellent long-term heat aging resistance, radiation resistance, stable electrical properties, flame retardancy and excellent insulation properties. At present, the base materials of insulation materials commonly used for cables are materials such as polyethylene, polyvinyl chloride, and ethylene-propylene rubber. However, the main disadvantage of these base materials is that they are easy to catch fire and cause fires. The use of halogen-containing flame-retardant polyvinyl chloride, although it has a certain flame-retardant effect, compared with the use of polyolefin and other halogen-free base materials, the use of polyvinyl chloride base materials will produce toxic hydrogen chloride gas and a lar...

AI Technical Summary

Problems solved by technology

[0003] However, only by adding inorganic flame retardants to realize the flame retardancy of insulating materials for cables, its safety is still not guaranteed, and aging and damage will inevitably occur during the use of insulating materials, resulting in the inability of inorganic flame retardants to provide comprehensive There are potential safety hazards, which are easy to cause fires, and are not easy to find, causing large economic losses.

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