Manufacturing process of ceramic silicone rubber composite material for fire-resistant power cable

Abstract

The invention discloses a manufacturing process of a ceramic silicone rubber composite material for a fire-resistant power cable, which comprises the following steps: respectively adding 1-5 parts ofisopropyl titanate into 12-15 parts of glass powder, 6-10 parts of boron nitride, 10-15 parts of magnesium oxide and 8-15 parts of fumed silica, and stirring the raw materials in a kneading machine for 10 minutes for later use; performing roll-wrapping mixing on 100 parts of methyl vinyl silicone rubber and 15-25 parts of ethylene-methacrylic acid copolymer, wherein the mixing temperature is below50 DEG C, and the mixing time is 10 minutes; then adding 12-15 parts of glass powder subjected to surface treatment, 6-10 parts of boron nitride, 10-15 parts of magnesium oxide and 8-15 parts of fumed silica into the raw rubber for roll wrapping, wherein the mixing temperature is 50 DEG C or below, and the mixing time is 20 min. The ceramic shell is good in tensile resistance and impact resistance, uniform and compact in structure and not prone to cracking, the firing time is shortened, and energy consumption is reduced.

Description

technical field [0001] The invention relates to the technical field of silicone rubber composite materials, in particular to a manufacturing process of ceramic silicone rubber composite materials for fire-resistant power cables. Background technique [0002] Silicone rubber has low density, high insulation properties, excellent mechanical properties and ablation resistance. With silicone rubber as the matrix, ceramic fillers and sintering aids can be used to prepare ceramic silicone rubber composites for molding or extrusion. The material can be sintered into a ceramic body under a high-temperature furnace or a flame, and has various excellent properties of a silicone rubber composite material at room temperature. When encountering high temperature or flame ablation, a hard ceramic layer can be formed on the surface of the composite material, effectively isolating the inside of the material from the outside world. The ceramizable silicone rubber fire-resistant cable prepare...

AI Technical Summary

Problems solved by technology

However, there are many defects in the use of ceramic cables at present. Higher temperature is required to form a ceramic structure, and the structure is unstable, with poor tensile and impact resistance, and cannot perform a good insulation function.

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