Silane cross-linking semi-conductive inner shielding material and production process thereof

Abstract

The invention discloses a silane cross-linking semi-conductive inner shielding material and a production process thereof. The production process comprises the following steps: preparing a high-conductivity material A; preparing a catalytic material B; mixing and extruding the high-conductivity material A and the catalytic material B into a mixture; performing warm water crosslinking on the mixture to obtain a finished product. In a manufacturing process of the high-conductivety material A, an ethylene- vinyl silane copolymer is subjected to warm water cross-linking, so silane grafting reaction in a traditional process is avoided, the reaction temperature is within 140 DEG C, no coke is produced, the production continuity is good, the stability is high, the energy consumption is low, continuous production can be realized without stopping, periodically shutting down equipment to clear the coke in the equipment is not needed, a prepared cable material is excellent in mechanical and insulating properties and semi-conductivity, which is conducive to improving the transmission capacity of a power grid, improving the wind resistance of a line, and improving and enhancing the safety and reliability of a distribution system.

Description

technical field [0001] The invention relates to a cable material, in particular to a silane cross-linked semi-conductive inner shielding material and a production process thereof. Background technique [0002] With the rapid development of the national economy, the development of the power grid is advancing by leaps and bounds, and higher requirements are put forward for the reliability of power supply. The use of overhead insulated cables is becoming more and more common, and the proportion of lines is increasing. The use of overhead insulated cables is conducive to improving the power transmission capacity of the power grid, improving the wind resistance of the line, improving and enhancing the safety and reliability of the power distribution system, and improving the power supply utilization rate of the line; it is conducive to urban construction and greening work, and reduces the pruning of trees along the line Reduce the amount of trees touching the wires, causing short...

AI Technical Summary

Problems solved by technology

At present, most silane cross-linking shielding materials are prepared by mixing graft A material and catalytic B material to prepare silane cross-linking semi-conductive shielding materials. The preparation of A material is the reaction of grafted silane triggered by peroxide, and the reaction temperature is relatively high. If it is higher than 200°C, high temperature control of the equipment is required. In addition, the introduction of peroxide will cause some resins to cross-link and produce coke, which requires regular shutdown to clean the coke in the equipment and other problems.

Images