Low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and preparation method thereof

Abstract

The invention discloses a low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material and a preparation method thereof.The low-temperature shell-forming high-hardness ceramic flame-retardant polyethylene cable material is prepared from 30-50 parts of high-density polyethylene, 20-40 parts of linear low-density polyethylene, 10-20 parts of an ethylene-vinyl acetate copolymer, 5-16 parts of an ethylene-octene copolymer elastomer, 8 to 12 parts of a maleic anhydride grafted copolymer elastomer, 1 to 2 parts of a color master batch, 50 to 80 parts of a nano ceramic shell forming agent, 15 to 30 parts of kaolin, 15 to 30 parts of aluminum hydroxide, 10 to 35 parts of magnesium hydroxide, 20 to 30 parts of zinc borate, 3 to 8 parts of nano montmorillonite, 1 to 2 parts of an antioxidant and 0.5 to 1 part of stearic acid. The cable material disclosed by the invention has excellent mechanical property and environmental stress cracking resistance, the processing thickness of a cable outer sheath is greatly reduced, and the material is ensured to form a high-hardness ceramic shell in a combustion process; the material is free of any halogen and heavy metal salt compounds, so that the environment-friendly characteristic of the insulating material is ensured; and the preparation method is simple and easy to operate.

Description

technical field [0001] The invention relates to a low-temperature shell-formed high-hardness ceramic flame-retardant polyethylene cable material and a preparation method thereof, belonging to the technical field of cable materials. Background technique [0002] Polyethylene (PE) has excellent processability, mechanical properties and electrical insulation properties, and is widely used in the cable industry. However, the flame retardancy of PE is poor, and the cables made are easy to burn and cause fire under external conditions such as high pressure, high temperature, and discharge, so PE plastics need to be flame retardant treated. Although there are many related reports on the flame retardancy of PE plastics, there are still problems such as large amount of flame retardants added and serious loss of mechanical properties. Contents of the invention [0003] The invention provides a low-temperature shell-forming high-hardness ceramicized flame-retardant polyethylene cabl...

AI Technical Summary

Problems solved by technology

However, the flame retardancy of PE is poor, and the cables made are easy to burn and cause fires under high pressure, high temperature, discharge and other external conditions, so PE plastics need to be treated with flame retardancy

Although there are many related reports on the flame retardancy of PE plastics, there are still problems such as large amount of flame retardants added and serious loss of mechanical properties.

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