A kind of 10kv level irradiation crosslinkable polyolefin insulation material and its preparation method

Abstract

The invention relates to a 10kV level radiation crosslinkable polyolefin insulating material and a preparation method thereof. The insulating layer is prepared by adding low-density polyethylene and ethylene-vinyl acetate copolymer as base materials, adding cross-linking sensitizers, antioxidants, antistatic agents, lubricants and fillers. The preparation method is to Add the base material to the internal mixer and then add the crosslinking agent to mix, then add the rest of the materials to mix, then send the blend into a twin-screw plus single-screw granulator for extrusion and granulation, and then put the granules into the extruder After being extruded into a cable, electron irradiation can be carried out. The insulation layer of the present invention has excellent high temperature resistance, oxidation resistance, aging performance, good insulation performance, electrical performance and mechanical performance, and can effectively inhibit discharge damage. Its preparation process is simple, reliable.

Description

technical field [0001] The invention relates to a 10kV level radiation crosslinkable polyolefin insulating material and a preparation method thereof. The insulating material can be used for 10kV level irradiation cross-linked polyolefin insulated power cables in general occasions; it can also be used in special occasions, such as 10kV level irradiation crosslinked polyolefin insulated airport lighting cables, etc. technical background [0002] As we all know, in my country's traditional power supply system and power supply system under high temperature and other specific environments, chemical cross-linked polyethylene power cables are used, that is, the polyethylene insulation wrapped on the surface of the conductor is cross-linked by chemical cross-linking method, such as Steam method, salt bath method, nitrogen method, etc., the process control is difficult, the working hours and materials are wasted, and the production efficiency is low. It is easy to cause impurities to ...

AI Technical Summary

Problems solved by technology

[0002] As we all know, in my country's traditional power supply system and power supply system under high temperature and other specific environments, chemical cross-linked polyethylene power cables are used, that is, the polyethylene insulation wrapped on the surface of the conductor is cross-linked by chemical cross-linking method, such as Steam method, salt bath method, nitrogen method, etc., the process control is difficult, the working hours and materials are wasted, and the production efficiency is low. It is easy to cause impurities to remain due to incomplete reaction of additives, which affects the insulation performance, and is also prone to water trees, Phenomena such as eccentricity and melt flow affect the electrical and mechanical properties, and the temperature resistance level is only 90°C. At the same time, it is restricted by environmental protection because the combustion of the boiler is easy to cause air pollution.

At present, chemical cross-linking production can only maintain the status quo

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