High-voltage incoming wire sheath material with excellent insulation stability

Abstract

The invention discloses a high-voltage incoming wire sheath material with excellent insulation stability, which comprises the following raw materials in weight proportion: 7-10 parts of modified silicone rubber, 25-30 parts of medium density polyethylene resin, 12-16 parts of polyvinylidene chloride, 2.1-2.3 parts of precipitated white carbon black, 13-16 parts of ceramic powder, 1.2-1.6 part of magnesium oxide, 0.6-0.8 part of vulcanization accelerator, 1.5-1.8 part of antioxidant RD, 3.5-4.5 parts of dicumyl peroxide, 3.2-4.5 parts of rare earth stabilizer, 2.1-3.2 parts of 2,6-di-tert-butyl-4-methylphenol, 5.0-7.0 parts of dibutyl maleate and 14-16 parts of reaction adjuvant. The invention combines the advantages of modified silicone rubber, medium density polyethylene, polyvinylidene chloride and other raw materials and makes it have good processability and mechanical properties. By using the physical properties of modified silicone rubber, LSR adopts platinum catalyst to avoid by-products, and LSR has good hydrophobicity and stable hydrophobic migration properties to improve its insulation performance.

Description

technical field [0001] The invention relates to the technical field of silicone rubber polymer materials, in particular to a high-voltage incoming line sheath material with excellent insulation stability. Background technique [0002] With the development of the economy, the places where cables need to be used have become diversified, and there are more stringent and diverse requirements for the performance indicators of cable sheath materials, such as insulation, tensile strength, service temperature, flame retardant performance and other indicators There are strict requirements, and the continuous improvement of the performance of the sheath material is an urgent need for economic and social development. [0003] Traditional sheath materials are limited by materials. For cables buried below the ground, due to long-term exposure to humid environments, the hydrophobic performance of the cable surface sheath decays quickly, and the hydrophobic performance of the cable sheath ...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the shortcoming of rapid attenuation of the hydrophobicity of the cable sheath in the prior art, and propose a high-voltage incoming line sheath material with excellent insulation stability