阅读说明：本技术 一种长寿命双层共挤绝缘辐照交联无卤低烟阻燃电力电缆 (A kind of coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer ) 是由 徐晓丽 夏候东 周俊 宰学龙 韩俊宝 朱元忠 陈安鹏 陶恒莹 于 2019-07-29 设计创作，主要内容包括：本发明公开了一种长寿命双层共挤绝缘辐照交联无卤低烟阻燃电力电缆,包括导体、包裹在导体外部的耐火层、包裹在耐火层外部的双层共挤绝缘层和包裹在双层共挤绝缘层外部的外护层；所述外护层由三元乙丙橡胶复合材料制备而成；所述三元乙丙橡胶复合材料的原料包括：三元乙丙橡胶、硅橡胶、白炭黑、膨润土、滑石粉、氧化锌、硬脂酸、硫化剂、聚磷酸铵、氢氧化铝、微胶囊化红磷、密胺焦磷酸盐、季戊四醇、促进剂、防老剂。本发明提出的长寿命双层共挤绝缘辐照交联无卤低烟阻燃电力电缆,其阻燃和抑烟性好,耐热耐老化性能优异,使用寿命长。(The invention discloses a kind of coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cables of long life double layer, including conductor, the flame retardant coating being wrapped in outside conductor, the double-layer coextrusion insulated layer being wrapped in outside flame retardant coating and the outer jacket being wrapped in outside double-layer coextrusion insulated layer；The outer jacket is prepared by ternary ethlene propyene rubbercompound material；The raw material of the ternary ethlene propyene rubbercompound material includes: ethylene propylene diene rubber, silicon rubber, white carbon black, bentonite, talcum powder, zinc oxide, stearic acid, vulcanizing agent, ammonium polyphosphate, aluminium hydroxide, microencapsulated powder oil, melamine pyrophosphate, pentaerythrite, promotor, anti-aging agent.The coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer proposed by the present invention, fire-retardant and smoke-suppressing is good, and heat-resisting ageing-resisting is had excellent performance, long service life.)

1. a kind of coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer, which is characterized in that including conductor, It is wrapped in the flame retardant coating outside conductor, the double-layer coextrusion insulated layer that is wrapped in outside flame retardant coating and is wrapped in double-layer coextrusion insulated layer External outer jacket；Wherein, the outer jacket is prepared by ternary ethlene propyene rubbercompound material；The ethylene propylene diene rubber is multiple The raw material of condensation material includes: 65-80 parts of ethylene propylene diene rubber, 20-35 parts of silicon rubber, 10-18 parts of white carbon black, swelling by weight 8-15 parts native, 8-15 parts of talcum powder, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of vulcanizing agent, 8-20 parts of ammonium polyphosphate, hydrogen-oxygen Change aluminium 7-15 parts, 6-15 parts of microencapsulated powder oil, 8-14 parts of melamine pyrophosphate, 2-5 parts of pentaerythrite, 0.5-2 parts of promotor, 2.5-3.5 parts of anti-aging agent.

2. the coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer according to claim 1, feature It is, the bentonite is modified alta-mud；The modified alta-mud is prepared according to following technique: lanthanum base bentonite is added Enter in dimethyl sulfoxide and be uniformly mixed, the ethanol solution stirring that the ethanol solution and isonicotinic acid of tert-butyl hydroquinone is then added is equal It is even, it is then stirred to react 5-12h at 65-75 DEG C, cools down, be filtered, washed after reaction, being dried to obtain the bentone Soil.

3. the coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer according to claim 2, feature It is, in the preparation process of modified alta-mud, lanthanum base bentonite, tert-butyl hydroquinone, the weight ratio of isonicotinic acid are 12- 20:0.5-0.8:0.4-0.7.

4. the coextrusion insulated irradiation crosslinking halogen-free low-smoke and flame retardant electric power electricity of long life double layer described in any one of -3 according to claim 1 Cable, which is characterized in that the vulcanizing agent is the mixture of cumyl peroxide and sulphur, and cumyl peroxide and sulphur Weight ratio be 2-6:1-2.

5. the coextrusion insulated irradiation crosslinking halogen-free low-smoke and flame retardant electric power electricity of long life double layer described in any one of -4 according to claim 1 Cable, which is characterized in that the average grain diameter of the aluminium hydroxide is 0.9-1.4 μm.

6. the coextrusion insulated irradiation crosslinking halogen-free low-smoke and flame retardant electric power electricity of long life double layer described in any one of -5 according to claim 1 Cable, which is characterized in that the promotor is the mixture of promotor EZ, promotor PPD, and the weight of promotor EZ, promotor PPD Amount is than being 1-3:5-9.

7. the coextrusion insulated irradiation crosslinking halogen-free low-smoke and flame retardant electric power electricity of long life double layer described in any one of -6 according to claim 1 Cable, which is characterized in that the anti-aging agent is the mixture of anti-aging agent 445 and antioxidant D DA, and anti-aging agent 445 and antioxidant D DA Weight ratio be 5-10:2-3.

8. the coextrusion insulated irradiation crosslinking halogen-free low-smoke and flame retardant electric power electricity of long life double layer described in any one of -7 according to claim 1 Cable, which is characterized in that the raw material of the ternary ethlene propyene rubbercompound material further includes the silane coupling agent of 1.5-3 parts by weight；Institute State the mixture that silane coupling agent is vinyltriethoxysilane and dodecyl triethoxysilane.

9. the coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer according to claim 8, feature It is, the weight ratio of vinyltriethoxysilane and dodecyl triethoxysilane is 1:5-9.

Technical field

The present invention relates to field of cable technology more particularly to a kind of low cigarettes of the coextrusion insulated irradiation crosslinking halogen-free of long life double layer Flame-proof power cable.

Background technique

Power cable is the cable for being used for transmission and distributing electric energy, is had been widely used in building field at present.It builds at present The wire laying mode for building wire and cable in field is changed to concealed wire by open-wire line, and replacement is got up highly difficult after weathering, and this requires institutes There is long service life with cable, but existing domestic electric wire actually uses the longevity due to factors such as material, technique, technologies Life only 20 years or so, 70 years requirements of building are not able to satisfy, while existing cable-flame retardant smoke-suppressing is not In very well It is easy to appear short circuit and fire hazard accident in use process, while discharging a large amount of toxic corrosive gas and dense smoke, causes " secondary Disaster "；With the quickening of urbanization process, the fast development of electric power transmission, so that requirement of the people to wire and cable is increasingly Height, its service life of existing cable and anti-flammability have been unable to meet requirement, need to be modified.

Summary of the invention

Technical problems based on background technology, the invention proposes a kind of coextrusion insulated cross-linking radiations of long life double layer Zero-halogen low-smoke flame-retardant electrical cable, fire-retardant and smoke-suppressing is good, and heat-resisting ageing-resisting is had excellent performance, long service life.

The coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of a kind of long life double layer proposed by the present invention, including lead Body, the flame retardant coating being wrapped in outside conductor, the double-layer coextrusion insulated layer being wrapped in outside flame retardant coating and to be wrapped in double-layer coextrusion exhausted Outer jacket outside edge layer；Wherein, the outer jacket is prepared by ternary ethlene propyene rubbercompound material；The ethylene-propylene-diene monomer The raw material of glue composite material include: by weight 65-80 parts of ethylene propylene diene rubber, 20-35 parts of silicon rubber, 10-18 parts of white carbon black, 8-15 parts of bentonite, 8-15 parts of talcum powder, 3-5 parts of zinc oxide, 1-2 parts of stearic acid, 1-2 parts of vulcanizing agent, 8-20 parts of ammonium polyphosphate, 7-15 parts of aluminium hydroxide, 6-15 parts of microencapsulated powder oil, 8-14 parts of melamine pyrophosphate, 2-5 parts of pentaerythrite, promotor 0.5- 2 parts, 2.5-3.5 parts of anti-aging agent.

Preferably, the bentonite is modified alta-mud；The modified alta-mud is prepared according to following technique: by lanthanum Base bentonite is added in dimethyl sulfoxide and is uniformly mixed, and the ethanol solution of tert-butyl hydroquinone and the ethyl alcohol of isonicotinic acid is then added Solution stirs evenly, and 5-12h is then stirred to react at 65-75 DEG C, cools down, is filtered, washed after reaction, being dried to obtain institute State modified alta-mud.

Preferably, in the preparation process of modified alta-mud, lanthanum base bentonite, tert-butyl hydroquinone, isonicotinic acid weight Amount is than being 12-20:0.5-0.8:0.4-0.7.

Preferably, the vulcanizing agent is the mixture of cumyl peroxide and sulphur, and cumyl peroxide and sulphur The weight ratio of sulphur is 2-6:1-2.

Preferably, the average grain diameter of the aluminium hydroxide is 0.9-1.4 μm.

Preferably, the promotor is the mixture of promotor EZ, promotor PPD, and promotor EZ, promotor PPD Weight ratio is 1-3:5-9.

Preferably, the anti-aging agent is the mixture of anti-aging agent 445 and antioxidant D DA, and anti-aging agent 445 and anti-aging agent The weight ratio of DDA is 5-10:2-3.

Preferably, the raw material of the ternary ethlene propyene rubbercompound material further includes the silane coupling agent of 1.5-3 parts by weight；Institute State the mixture that silane coupling agent is vinyltriethoxysilane and dodecyl triethoxysilane.

Preferably, vinyltriethoxysilane and the weight ratio of dodecyl triethoxysilane are 1:5-9.

The coextrusion insulated irradiation crosslinking halogen-free low-smoke flame-retardant electrical cable of long life double layer of the present invention, outer jacket is by spy Fixed ternary ethlene propyene rubbercompound material is prepared, and gained cable service life is not less than 70 years, and the feature of environmental protection is good, security performance It is excellent；In the raw material of ternary ethlene propyene rubbercompound material, specifically using ethylene propylene diene rubber as major ingredient, while joined silicon rubber with It cooperates, and the weight ratio for controlling the two is specially 65-80:20-35, so that the two is played synergistic effect, makes resulting materials Heat-resisting quantity and ageing-resistant performance it is good；In the preparation process of modified alta-mud, with lanthanum base bentonite, tert-butyl hydroquinone It is raw material with isonicotinic acid, makes tert-butyl hydroquinone and isonicotinic acid and lanthanum that coordination have occurred, be inserted into bentonite lamella Between, it increases bentonitic interlamellar spacing, in addition system, disperses in system more uniform, improve the mechanics of composite material Performance, while there is synergistic effect with anti-aging agent, the thermal stability and resistance to ag(e)ing of composite material are improved, in material combustion In the process, the isonicotinic acid for decomposing generation can promote the decomposition of the fire retardants such as ammonium polyphosphate, play the role of inhibiting burning, improve The anti-flammability of system；It has been specifically chosen ammonium polyphosphate, aluminium hydroxide, microencapsulated powder oil, melamine pyrophosphate, pentaerythrite As fire retardant, there is synergistic effect after five weight ratio mixing according to the invention, improve the oxygen index (OI) of composite material, drop Low maximum heat release rate always discharges hot and always gives birth to smoke, maintains the mechanical property such as its tensile strength, elongation at break Energy；It has selected the mixture of anti-aging agent 445 and antioxidant D DA as anti-aging agent, so that the two is played synergistic effect, in the mistake used Cheng Zhong, the anti-aging agent 445 of high activity first release H atom and go to terminate free radical, and the antioxidant free radical of generation then can be old from preventing A H atom is obtained on agent DDA and is regenerated, to extend protection effect, the two plays synergistic effect, significantly improves composite wood The heat-resistant air aging property of material；Specifically using vinyltriethoxysilane and dodecyl triethoxysilane cooperate as Coupling agent, dodecyl triethoxysilane can use its chain alkyl and be wound with rubber molecule interchain, guarantee to fill out Expect the stability of dispersion, and vinyltriethoxysilane is during high temperature vulcanized, vulcanization reaction or itself it can be participated in Between reaction, reinforcing filler and rubber effect chemical activity reflecting point, avoid excessively being crosslinked between filler, by the two according to this After weight ratio in application is blended, both make to play optimal synergistic effect, while enhancing between filler, between filler and major ingredient Interaction, while being conducive to the dispersion stabilization of filler, make resulting materials mechanical property with higher and good high temperature resistant Ageing properties；The average grain diameter for specifically controlling aluminium hydroxide, makes it have higher large specific surface area, and heating surface area is big, heat Decomposition rate is fast, with ammonium polyphosphate, microencapsulated powder oil, melamine pyrophosphate, pentaerythrite cooperation after be conducive to it is heat-insulated, every Oxygen further improves anti-flammability.

Specific embodiment

In the following, technical solution of the present invention is described in detail by specific embodiment.