Low-smoke low-halogen flame-retardant insulation-grade PVC (polyvinyl chloride) sheath material for ultrahigh-voltage cable, and preparation of low-smoke low-halogen flame-retardant insulation-grade PVC sheath material

Abstract

The invention discloses a low-smoke low-halogen flame-retardant insulation-grade PVC (polyvinyl chloride) sheath material for an ultrahigh-voltage cable, and preparation of the low-smoke low-halogen flame-retardant insulation-grade PVC sheath material. The low-smoke low-halogen flame-retardant insulation-grade PVC sheath material for the ultrahigh-voltage cable comprises the following components in parts by weight: 100 parts of PVC resin, 10-20 parts of plasticizer a, 10-15 parts of calcined clay, 1-3 parts of flame retardant a, 1-2 parts of pigment carbon black, 2-8 parts of flame retardant b, 2-5 parts of heat stabilizer, 5-10 parts of plasticizer b, 0.1-0.2 part of antioxidant, 1-2 parts of flame retardant synergist, 0.2-0.4 part of polyethylene wax, 0.5-1 part of lubricant, 10-20 parts of plasticizer c, 1-2 parts of metal naphthenate, 0.5-5 parts of capsaicine and 5-10 parts of antismoke agent. The low-smoke low-halogen flame-retardant insulation-grade PVC sheath material for the ultrahigh-voltage cable can be widely applied to an outer ultrahigh-voltage cable sheath which needs to be flame-retardant, is low in smoke density and halogen acid gas content during combustion, and is rat-proof and termite-proof.

Description

technical field [0001] The invention relates to a cable sheath material and a preparation method thereof, in particular to a low-smoke, low-halogen flame-retardant insulating grade PVC sheath material for ultra-high voltage cables and a preparation method thereof. Background technique [0002] In recent years, plastics, rubber, synthetic fibers and other polymer materials and their products have been vigorously developed. They are rapidly replacing steel, metal, cement, wood, cotton and other natural polymers, and are widely used in industries, agriculture, military and other national economy. each department. However, most synthetic materials are flammable and combustible materials, while flame-retardant materials often contain high halogens, which can produce a large amount of toxic gases during combustion, causing harm to the environment and posing a huge threat to people's life safety. Therefore, , How to improve the flame retardancy of synthetic materials and reduce th...

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Problems solved by technology

[0005] The purpose of the present invention is to solve the defects of the existing 90°C temperature-resistant grade PVC sheathing material in the prior art with low volume resistance, no rodent resistance and no termite resistance, and provide an insulation grade with higher electrical properties, and low smoke, Low-smoke, low-halogen, flame-retardant insulating grade PVC sheath material for ultra-high voltage cables with low-halogen, flame-retardant, rodent-proof, termite-proof, and temperature resistance of 90°C and its preparation method

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