Medium-voltage low-smoke halogen-free flame-retardant silicone rubber insulating material and its manufacturing process

Abstract

The invention discloses an intermediate pressure level low-smoke zero-halogen flame-retardant silicon rubber insulating material and a manufacturing process thereof. The material is characterized by being prepared from the following raw materials in parts by weight: 35-45 parts of methyl vinyl organic silicon rubber, 15-25 parts of white carbon black, 1.5-3 parts of nano-montmorillonite, 10-25 parts of aluminum hydroxide, 10-18 parts of magnesium hydroxide, 0.4-0.8 part of an across-linking agent, 2-5.8 parts of a structure control agent, 2-4 parts of iron oxide red and 0.80-1.5 parts of a coupling agent. The insulating material disclosed by the invention not only can satisfy the requirements on heat resistance, high electrical insulating performance and the like of an intermediate pressure level cable insulating material, a cable accessory and the like, but also has high mechanical strength, so that the novel application field of the silicon rubber material is opened up.

Description

technical field [0001] The invention belongs to the technical field of silicone rubber insulating materials, and in particular relates to a silicone rubber insulating material used in high-voltage, high-low temperature, flame-retardant, environmental-friendly, flexible wires and cables and a manufacturing process thereof. Background technique [0002] Silicone rubber has excellent electrical insulation properties and good physical and mechanical properties. It is resistant to atmospheric aging, odor aging, light aging, flame retardant, radiation resistance, and oil resistance. It is one of the elastomer materials with the highest service temperature. As an insulating material, It can be widely used in the insulation and sheathing of various cables such as marine cables, aviation conductors, motor leads, heating cables, etc. [0003] Due to the excellent characteristics of silicone rubber materials, the demand for silicone rubber insulated wires and cables is increasing, but ...

AI Technical Summary

Problems solved by technology

However, the mechanical properties of ordinary silicone rubber are relatively poor compared to other rubber materials, and do not meet the requirements under special conditions. Improving the electrical and mechanical properties of silicone rubber materials operating at the 6-35kV level has become the first choice for many silicone rubber materials. focus one

[0004] The requirements of the above performance indicators have contradictions in the formulation design of materials, which has become a difficulty in the research and development of this type of materials

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