A long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable

Abstract

The invention discloses a long-life double-layer co-extruded insulating radiation cross-linked halogen-free low-smoke flame-retardant power cable, which comprises a conductor, a refractory layer wrapped outside the conductor, a double-layer co-extruded insulating layer wrapped outside the refractory layer and The outer sheath wrapped on the outside of the double-layer co-extruded insulation layer; the outer sheath is prepared from EPDM composite materials; the raw materials of the EPDM composite materials include: EPDM rubber, Silicone rubber, silica, bentonite, talc, zinc oxide, stearic acid, vulcanizing agent, ammonium polyphosphate, aluminum hydroxide, microencapsulated red phosphorus, melamine pyrophosphate, pentaerythritol, accelerator, anti-aging agent. The long-life double-layer co-extruded insulation irradiation cross-linked halogen-free low-smoke flame-retardant power cable proposed by the invention has good flame retardancy and smoke suppression, excellent heat resistance and aging resistance, and long service life.

Description

technical field [0001] The invention relates to the technical field of cables, in particular to a long-life double-layer co-extrusion insulation irradiation cross-linked halogen-free low-smoke flame-retardant power cable. Background technique [0002] Power cables are cables used to transmit and distribute electrical energy and have been widely used in the construction field. At present, the wiring method of wires and cables in the construction field has changed from open wires to hidden wires. It is difficult to replace them after aging. This requires the cables used to have a long service life. However, the existing domestic wires are due to factors such as materials, processes, and technologies. The actual service life is only about 20 years, which cannot meet the requirements of the building for 70 years. At the same time, the existing cables are not very good in flame retardancy and smoke suppression. During use, short-circuit fire accidents are prone to occur, and a la...

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Problems solved by technology

At present, the wiring method of wires and cables in the construction field has changed from open wires to hidden wires. It is difficult to replace them after aging. This requires the cables used to have a long service life. However, the existing domestic wires are due to factors such as materials, processes, and technologies. The actual service life is only about 20 years, which cannot meet the requirements of the building for 70 years. At the same time, the existing cables are not very good in flame retardancy and smoke suppression. During use, short-circuit fire accidents are prone to occur, and a large amount of toxic and corrosive gases are released at the same time. and thick smoke, causing "secondary disasters"; with the acceleration of urbanization and the rapid development of power transmission, people's requirements for wires and cables are getting higher and higher, and the service life and flame retardancy of existing cables can no longer be Meet the requirements, need to be modified

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