High-performance cable sheath material and preparation method thereof

Abstract

The invention discloses a high-performance cable sheath material and a preparation method thereof. The material is characterized by being prepared from the following raw materials by weight: 3 to 6 parts of EVA resin, 2 to 4 parts of anhydrous lithium chloride, 90 to 100 parts of polyvinyl chloride, 10 to 15 parts of magnesium hydroxide, 5 to 10 parts of antimony trioxide, 10 to 14 parts of nanometer clay, 0.3 to 0.7 part of a silane coupling agent kh550, 0.5 to 1 part of polyvinyl alcohol, 0.1 to 0.3 part of sodium dodecyl benzene sulfonate, 0.5 to 2 parts of sodium bicarbonate, 2 to 5 parts of styrene, 0.02 to 0.05 part of potassium persulfate, 10 to 15 parts of dioctyl terephthalate, 3 to 5 parts of polychloroprene, 2 to 4 parts of aluminum powder, 3 to 5 parts of stearic acid, 3 to 4 parts of epoxy linseed oil and a proper amount of water. The sheath material prepared by using the method in the invention has the advantages of excellent performances in all aspects, good mechanical property, low cost, long service life and extensive application prospects.

Description

technical field [0001] The invention relates to the field of cable materials, in particular to a high-performance cable sheath material and a preparation method thereof. Background technique [0002] Digital communication transmission cables are the fastest growing among all kinds of cables, but the cables also bring the risk of fire while providing convenience to the society. If the cables are ignited due to their own and external reasons, it is possible to burn along the cables. The direction of laying spreads from inside to outside of the building, and then ignites other combustibles, causing a bigger fire. At the same time, the cable will produce toxic smoke when burning, causing loss of life and property. Therefore, with the improvement of safety awareness, people That is to say, the flame retardant requirements of cables are getting higher and higher. The flame retardant performance of cables mainly depends on the coating materials used. Commonly used cable materials a...

AI Technical Summary

Problems solved by technology

[0003] The combustion of polyvinyl chloride can be divided into several stages of heating, decomposition, ignition, combustion and propagation. During the combustion of polyvinyl chloride, there is a lot of smoke and it will produce HCl toxic gas, so it is necessary to add flame retardants to reduce the risk of polyvinyl chloride. The flammable products produced by the decomposition of ethylene can prevent or dilute the escape of flammable gas products produced by the decomposition. The decomposition temperature of magnesium hydroxide is high, and a dehydration reaction occurs after decomposition, which can absorb a large amount of heat on the surface of polymer materials and reduce the surface of burning materials. temperature, dehydration at the same time produces a large amount of water vapor, dilutes combustible gas and oxygen concentration, but the compatibility of magnesium hydroxide with polymer materials is not very good