Screen material for 35kV grade high/medium voltage crosslinked cable conductor layer and preparation method thereof

Abstract

The invention discloses a screen material for a 35kV grade high / medium voltage crosslinked cable conductor layer, which is characterized by comprising the following components in parts by weight: 40-65 parts of EVA (ethylene-vinlacetate copolyme), 5-15 parts of PE (polyethylene), 30-50 parts of conductive black, 1-5 parts of dispersing agent, 0.3-1.5 parts of antioxygen, 4-8 parts of white oil, 0.3-5 parts of lubricant and 0.7-2.5 parts of cross-linking agent. The dispersing agent is added to the screen material, which enables the distribution of the conductive black to be extremely even; the torque of an extruder is very balanced when being used, the fluctuation of the wire diameter of the cable is very small, and the pre-crosslinking phenomenon is not easy to happen. The screen material can be unremittingly extruded for a long time, which is extremely beneficial to manufacturing big-length fixed-length cables and can improve the yield. The cross-linking agent in the crosslinked screen material is a tasteless peroxide, which is more beneficial to environmental protection.

Description

technical field [0001] The invention relates to a shielding material for a conductor layer of a 35KV medium and high voltage cross-linked cable, a preparation method and an application thereof. Background technique [0002] Cross-linked cable is a power cable that has developed rapidly in the past ten years. With the continuous innovation and improvement of cross-linked cable insulation materials, the manufacturing capacity of cross-linked cables in major domestic cable factories has grown from 10,000 volts to 110,000 volts. The voltage level is still increasing, and the production volume of medium and high voltage cables has also been greatly improved. From less than 1,000 kilometers in 2000 to over 100,000 kilometers in 2009, the number has grown rapidly. [0003] In 2008, the Chinese government invested 4 trillion yuan to stimulate domestic demand, of which more than 40% was used for urban and rural power grid construction and power grid transformation. XLPE cables are ...

AI Technical Summary

Problems solved by technology

[0004] Shielding materials in the prior art are prone to pre-crosslinking when extruded for a long time

The pre-crosslinked shielding material cannot be extruded smoothly, resulting in the failure of continuous production for a long time, affecting the production of cables, resulting in a low yield of cable production, only 80%-85%

Therefore, the shielding material in the prior art can only be divided into multiple proportions, and then produced separately

Images