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...

Examples

Embodiment 1

[0016] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 80 parts of ethylene propylene rubber, 20 parts of silicone rubber, 18 parts of white carbon black, 8 parts of bentonite, 15 parts of talcum powder, 3 parts of zinc oxide, 2 parts of stearic acid, 1 part of vulcanizing agent, 20 parts of ammonium polyphosphate, hydrogen 7 parts of alumina, 15 parts of microencapsulated red phosphorus, 8 parts of melamine pyrophosphate, 5 parts of pentaerythritol, 0.9 parts of accelerator, and 3 part...

Embodiment 2

[0018] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 70 parts of ethylene propylene rubber, 30 parts of silicone rubber, 10 parts of white carbon black, 15 parts of bentonite, 8 parts of talcum powder, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of vulcanizing agent, 8 parts of ammonium polyphosphate, hydrogen 15 parts of alumina, 6 parts of microencapsulated red phosphorus, 9 parts of melamine pyrophosphate, 4 parts of pentaerythritol, 0.5 parts of accelerator, and 3.5 par...

Embodiment 3

[0020] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 65 parts of ethylene propylene rubber, 35 parts of silicone rubber, 17 parts of white carbon black, 9 parts of bentonite, 13 parts of talcum powder, 3.7 parts of zinc oxide, 1.8 parts of stearic acid, 0.7 parts of dicumyl peroxide, and 0.7 parts of sulfur , 18 parts of ammonium polyphosphate, 9 parts of aluminum hydroxide, 13 parts of microencapsulated red phosphorus, 14 parts of melamine pyrophosphate, 2 parts of pentaerythritol, 0...

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...

Examples

Embodiment 1

[0016] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 80 parts of ethylene propylene rubber, 20 parts of silicone rubber, 18 parts of white carbon black, 8 parts of bentonite, 15 parts of talcum powder, 3 parts of zinc oxide, 2 parts of stearic acid, 1 part of vulcanizing agent, 20 parts of ammonium polyphosphate, hydrogen 7 parts of alumina, 15 parts of microencapsulated red phosphorus, 8 parts of melamine pyrophosphate, 5 parts of pentaerythritol, 0.9 parts of accelerator, and 3 part...

Embodiment 2

[0018] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 70 parts of ethylene propylene rubber, 30 parts of silicone rubber, 10 parts of white carbon black, 15 parts of bentonite, 8 parts of talcum powder, 5 parts of zinc oxide, 1 part of stearic acid, 2 parts of vulcanizing agent, 8 parts of ammonium polyphosphate, hydrogen 15 parts of alumina, 6 parts of microencapsulated red phosphorus, 9 parts of melamine pyrophosphate, 4 parts of pentaerythritol, 0.5 parts of accelerator, and 3.5 par...

Embodiment 3

[0020] The present invention proposes a long-life double-layer co-extruded insulation radiation cross-linked halogen-free low-smoke flame-retardant power cable, which includes 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; wherein, the outer sheath is prepared from EPDM composite material; the raw materials of the EPDM composite material include by weight: three 65 parts of ethylene propylene rubber, 35 parts of silicone rubber, 17 parts of white carbon black, 9 parts of bentonite, 13 parts of talcum powder, 3.7 parts of zinc oxide, 1.8 parts of stearic acid, 0.7 parts of dicumyl peroxide, and 0.7 parts of sulfur , 18 parts of ammonium polyphosphate, 9 parts of aluminum hydroxide, 13 parts of microencapsulated red phosphorus, 14 parts of melamine pyrophosphate, 2 parts of pentaerythritol, 0...

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