Irradiation cross-linking high-performance high flame-resistant electric wire and cable and preparation method thereof

Abstract

The invention provides an irradiation cross-linking high-performance high flame-resistant electric wire and cable which comprises conductors. A shielding layer is arranged outside each conductor, an irradiation cross-linking polyethylene insulation layer is arranged outside each shielding layer, a fire-resistant mica layer is arranged outside each irradiation cross-linking polyethylene insulation layer, the conductors are filled with rock wool ropes, a flame-resistant belt is arranged outside the conductors and the rock wool ropes, a flame-resistant polyethylene inner protection layer is arranged outside the flame-resistant belt, an armor layer is arranged outside the flame-resistant polyethylene inner protection layer, a flame-resistant polyethylene outer protection layer is arranged outside the armor layer, an abrasion-resistant layer is arranged outside the flame-resistant polyethylene outer protection layer, and an ultraviolet-proof layer coats the abrasion-resistant layer. The invention further provides a preparation method of the electric wire and cable. The irradiation cross-linking polyethylene insulation layers, the fire-resistant mica layers, the rock wool ropes, the flame-resistant polyethylene inner protection layer, the flame-resistant polyethylene outer protection layer and the abrasion-resistant layer have flame resistance, multiple layers are set, and the flame resistance of the electric wire and cable is far higher than that of similar products.

Description

technical field [0001] The invention relates to a wire and cable and a preparation method thereof, in particular to a radiation cross-linked high-performance and high-flame-retardant wire and cable and a preparation method thereof. Background technique [0002] Wire and cable is a wire product used to transmit electric (magnetic) energy, information and realize electromagnetic energy conversion. As the main carrier of power transmission, wire and cable are widely used in electrical equipment, lighting circuits, household appliances, etc. The quality of wire and cable directly affects the quality of the project and the safety of consumers' lives and property. Although the wire and cable industry is only a supporting industry, it accounts for 1 / 4 of the output value of China's electrical industry. It has a wide variety of products and a wide range of applications, involving industries such as electric power, construction, communications, and manufacturing, and is closely rela...

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Problems solved by technology

Peroxide chemical cross-linking is mainly suitable for large-scale medium-high voltage and ultra-high voltage polyethylene power cables, with a voltage level of 10-550 kV, but the cleaning and start-up costs of the peroxide chemical cross-linking production process are high

Silane crosslinking and radiation crosslinking are mainly suitable for medium and low voltage power cables below 10 kV and wires and cables for small-sized electrical equipment. The decomposition of silane crosslinking agents requires water as an initiator. Due to the intrusion of water, the dielectric properties of materials deteriorate. Limits the use of silane crosslinked polyethylene to some extent

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