High-voltage transformer substation cable insulating sheath material and preparation method thereof

Abstract

The invention discloses a high-voltage transformer substation cable insulating sheath material and a preparation method thereof. The sheath material is prepared from the following raw materials in parts by weight: 60-80 parts of metallocene linear low density polyethylene, 25-35 parts of isotactic polypropylene, 10-15 parts of EVA, 8-12 parts of aluminum hydroxide, 5-10 parts of magnesium hydroxide, 4-8 parts of zinc stannate, 12-18 parts of siliceous rock powder, 4-6 parts of polyethylene wax, 2-3 parts of terephthalic acid zinc, 1-2 parts of magnesium oxide, 3-5 parts of dimethyl silicone oil, 2-3 parts of basic lead silicate, 5-10 parts of triallyl trimellitate, 1-2 parts of gamma-methacryloxy propyl trimethoxyl silane, 15-25 parts of fumed silica, 10-15 parts of active calcium carbonate, 1-2 parts of an antioxidant 168, and 3-5 parts of a composite filler. The sheath material has excellent mechanical strength and abrasion resistance, can effectively improve the wear resistant ability and the impact resistant ability of a cable sheath, moreover, has good flame retardancy, is low in smoke and is halogen-free, effectively solves contradictions among the flame retardancy, the mechanical strength and the abrasion resistance of the sheath material, prolongs the service life of the sheath, and guarantees normal working of a high-voltage transformer substation cable.

Description

technical field [0001] The invention relates to a cable sheath material and a preparation method thereof, in particular to an insulating sheath material for high-voltage substation cables and a preparation method thereof. Background technique [0002] The cable sheath is an indispensable intermediate structural part of the cable, which plays the role of protecting the cable, ensuring the safety of the cable, and isolating the copper wire from water, air and other media to avoid leakage. At present, the sheath material of high-voltage cables is made of polyethylene material. In order to ensure the low-smoke and halogen-free flame-retardant function of the sheath, a large amount of inorganic aluminum hydroxide and magnesium hydroxide flame-retardant systems are usually added to the polyethylene system, resulting in the loss of the sheath material. Low mechanical strength and poor wear resistance make the sheath easily damaged during installation and laying, thus affecting the ...

AI Technical Summary

Problems solved by technology

At present, the sheath material of high-voltage cables is made of polyethylene material. In order to ensure the low-smoke and halogen-free flame-retardant function of the sheath, a large amount of inorganic aluminum hydroxide and magnesium hydroxide flame-retardant systems are usually added to the polyethylene system, resulting in the loss of the sheath material. Low mechanical strength and poor wear resistance cause the sheath to be easily damaged during installation and laying, thus affecting the normal operation of the cable

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