CN115274185A - Ultra-long-life halogen-free high-flame-retardant polyolefin wire and cable and preparation method thereof - Google Patents

Ultra-long-life halogen-free high-flame-retardant polyolefin wire and cable and preparation method thereof Download PDF

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CN115274185A
CN115274185A CN202210563916.2A CN202210563916A CN115274185A CN 115274185 A CN115274185 A CN 115274185A CN 202210563916 A CN202210563916 A CN 202210563916A CN 115274185 A CN115274185 A CN 115274185A
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parts
cable
halogen
wire
insulating layer
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张聪
张大伟
张涛
胡敦胜
胡磊绪
张继龙
李俊龙
潘晓
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Qingdao Hanhe Cable Co ltd
Qingdao Tonghe Han Cable Co ltd
Qingdao Zhongke Hanlan High Molecular Material Co ltd
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Qingdao Hanhe Cable Co ltd
Qingdao Tonghe Han Cable Co ltd
Qingdao Zhongke Hanlan High Molecular Material Co ltd
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    • HELECTRICITY
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    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
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    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00Apparatus or processes specially adapted for manufacturing conductors or cables
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    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B3/00Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties
    • H01B3/18Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances
    • H01B3/30Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes
    • H01B3/44Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins
    • H01B3/441Insulators or insulating bodies characterised by the insulating materials; Selection of materials for their insulating or dielectric properties mainly consisting of organic substances plastics; resins; waxes vinyl resins; acrylic resins from alkenes
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01BCABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00Insulated conductors or cables characterised by their form
    • H01B7/17Protection against damage caused by external factors, e.g. sheaths or armouring
    • H01B7/29Protection against damage caused by extremes of temperature or by flame
    • H01B7/295Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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    • C08K3/00Use of inorganic substances as compounding ingredients
    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/20Oxides; Hydroxides
    • C08K3/22Oxides; Hydroxides of metals
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    • C08K2003/2224Magnesium hydroxide
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    • C08K3/18Oxygen-containing compounds, e.g. metal carbonyls
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Abstract

The invention discloses an ultra-long-life halogen-free high-flame-retardant polyolefin wire and cable, wherein each wire consists of a conductor at the innermost layer, an inner insulating layer and an outer insulating layer which are sequentially wrapped outside the conductor, flame retardant is filled among a plurality of wires, all the wires and the filling are wrapped by wrapping bands, a sheath layer is wrapped outside the wrapping bands to form a cable, the inner insulating layer is made of a radiation cross-linked transparent polyethylene material, and the thickness of the inner insulating layer is 0.1-0.2 mm; the outer insulating layer and the sheath layer are made of radiation cross-linking halogen-free flame-retardant polyolefin materials, the thickness of the outer insulating layer is 0.5-1.2 mm, and the thickness of the sheath layer is 0.7-1.5 mm. The wire adopts a double-layer insulation structure, the insulation resistance constant is larger than 3670 MOmega.km, the flame retardance is realized by single vertical combustion, the flame retardance of the cable is realized by B-type bundled combustion, the service life of the wire and the cable can be more than 50 years at 90 ℃, the service life of the wire and the cable can be more than 70 years at 86 ℃, and the service life of the wire and the cable can be more than 100 years at 70 ℃.

Description

一种超长寿命无卤高阻燃聚烯烃电线电缆及制备方法An ultra-long-life halogen-free high flame-retardant polyolefin wire and cable and its preparation method

技术领域technical field

本发明涉及一种超长寿命无卤高阻燃聚烯烃电线电缆及制备方法,属于电线电缆技术领域。The invention relates to an ultra-long-life halogen-free highly flame-retardant polyolefin wire and cable and a preparation method thereof, belonging to the technical field of wires and cables.

背景技术Background technique

随着家用电器数量的快速增加,使得用电量迅速飙升,电线电缆线路满负荷或超负荷已成常态。由于传统电线、电缆的使用温度低、耐热性差、不环保(如PVC电线电缆),电线电缆快速老化,寿命终止。特别是早期建设的大量建筑物中使用的电线(使用寿命低于40年)开始出现老化,无法达到建筑物70年的使用寿命要求,此时,拆除老化布线,更换成本高,给建筑物留下安全隐患,还会降低建筑物的使用寿命。为此开发一种长寿命、环保型阻燃(无卤阻燃)、绝缘性能优异的与建筑物70年使用寿命相当的电线电缆具有巨大意义。With the rapid increase in the number of household appliances, electricity consumption has soared rapidly, and it has become normal for wires and cables to be fully loaded or overloaded. Due to the low operating temperature, poor heat resistance, and non-environmental protection of traditional wires and cables (such as PVC wires and cables), the wires and cables age rapidly and their lifespan ends. In particular, the wires used in a large number of buildings built in the early stage (with a service life of less than 40 years) began to age and could not meet the 70-year service life requirement of the building. It will reduce the safety hazard and reduce the service life of the building. For this reason, it is of great significance to develop a long-life, environmentally friendly flame-retardant (halogen-free flame-retardant), excellent insulation performance, and a wire and cable equivalent to the 70-year service life of buildings.

现有技术中,针对不同的环境会有不同的需求,比如:CN202120621851.3一种核电站和缓环境用长寿命非1E级电力电缆,电缆采用了单层长寿命绝缘材料相对于1E级电缆省去了双层绝缘共挤的工艺,提高了电缆的经济性。同时采用了耐辐照低烟无卤阻燃材料,使电缆具有良好的成束阻燃性能,可满足和缓环境内非1E级电缆的技术条件。采用上述方案后,本电缆的使用寿命达到60年以上,抗辐照性好、加工性能好、加工简便,可以有效提高生产效率,且同时满足电性能和机械性能的基本要求。该技术试图从结构上突破。In the prior art, there are different requirements for different environments, such as: CN202120621851.3 A long-life non-1E-level power cable for a nuclear power plant in a mild environment. The technology of double-layer insulation co-extrusion is improved, which improves the economy of the cable. At the same time, the radiation-resistant low-smoke halogen-free flame-retardant material is used to make the cable have good bundled flame-retardant performance, which can meet the technical conditions of non-1E-grade cables in mild environments. After adopting the above scheme, the cable has a service life of more than 60 years, good radiation resistance, good processing performance, easy processing, can effectively improve production efficiency, and simultaneously meet the basic requirements of electrical and mechanical properties. The technology tries to break through from the structure.

又如:CN201911194353.9一种机车电缆用高耐油高寿命辐照交联无卤低烟阻燃弹性体电缆料及其制备方法,该材料解决了阻燃、低烟、耐矿物油、耐燃料油、耐低温、耐刮磨、生产效率低等缺陷,同时在90℃环境下,材料使用寿命不低于32年。从材料上进行设计,但是使用寿命无法满足民用建筑的70年要求。Another example: CN201911194353.9 A high-oil-resistant, high-life irradiation cross-linked halogen-free, low-smoke, flame-retardant elastomer cable material for locomotive cables and its preparation method. , low temperature resistance, scratch resistance, low production efficiency and other defects, and at the same time in the environment of 90 ℃, the service life of the material is not less than 32 years. It is designed from the material, but the service life cannot meet the 70-year requirement of civil buildings.

发明内容Contents of the invention

本公司为了克服上述困难,组织了研发团队进行讨论,最终确定设计一种超长寿命无卤高阻燃聚烯烃电线电缆,其内绝缘层、外绝缘层与护套层电缆料根据IEC60216-1:2001规定的试验方法和Arrhenius公式推导出材料在90℃环境下使用50年以上,在86℃下使用70年以上,在70℃下使用100年以上,完全能够满足建筑物的同寿命要求,同时,提供该超长寿命无卤高阻燃聚烯烃电线电缆的制备方法。In order to overcome the above difficulties, the company organized a research and development team to discuss, and finally decided to design an ultra-long-life halogen-free high flame-retardant polyolefin wire and cable. : The test method specified in 2001 and the Arrhenius formula deduce that the material can be used for more than 50 years at 90°C, more than 70 years at 86°C, and more than 100 years at 70°C, which can fully meet the same life requirements of buildings. At the same time, a preparation method of the ultra-long-life halogen-free high flame-retardant polyolefin wire and cable is provided.

为达到上述目的,本发明所采用的技术手段是:一种超长寿命无卤高阻燃聚烯烃电线电缆,每根电线由最内层的导体,和依次包裹在导体外的内绝缘层、外绝缘层组成,在若干根电线之间填充阻燃并在所有电线和填充外以包带包裹,在包带外包裹护套层形成电缆,所述内绝缘层为辐射交联透明聚乙烯材料制成,内绝缘层厚度0.1~0.2mm;所述外绝缘层、护套层为辐射交联无卤阻燃聚烯烃材料制成,外绝缘层厚度0.5~1.2mm,护套层厚度0.7~1.5mm。In order to achieve the above purpose, the technical means adopted in the present invention are: an ultra-long-life halogen-free high flame-retardant polyolefin wire and cable, each wire is composed of the innermost conductor, and the inner insulation layer wrapped around the conductor in turn, The outer insulation layer is composed of several wires filled with flame retardant and all wires and fillers are wrapped with tape, and the sheath layer is wrapped outside the tape to form a cable. The inner insulation layer is made of radiation cross-linked transparent polyethylene material The thickness of the inner insulation layer is 0.1-0.2mm; the outer insulation layer and the sheath layer are made of radiation cross-linked halogen-free flame-retardant polyolefin material, the thickness of the outer insulation layer is 0.5-1.2mm, and the thickness of the sheath layer is 0.7- 1.5mm.

进一步的,所述导体材料为镀锡铜、镀银铜、镀镍铜、铜、铜包钢中任意一种。Further, the conductor material is any one of tin-plated copper, silver-plated copper, nickel-plated copper, copper, and copper-clad steel.

进一步的,所述辐照交联透明聚烯烃材料,由以下重量份的原料组成:聚乙烯基材100份;主抗氧剂和辅助抗氧剂构成的复合抗氧剂1.5~4.5份;交联敏化剂0.5~2.5份。Further, the radiation cross-linked transparent polyolefin material is composed of the following raw materials in parts by weight: 100 parts of polyethylene substrate; 1.5-4.5 parts of composite antioxidant composed of main antioxidant and auxiliary antioxidant; Joint sensitizer 0.5-2.5 parts.

更进一步的,所述辐照交联透明聚乙烯材料的制备步骤:将聚乙烯基材、复合抗氧剂、交联敏化剂按重量份,倒入高混机低速速搅拌2~5分钟后,把混合均匀的材料导入双螺杆挤出机中,在140~200℃温度范围内挤出、水冷拉条鼓风造粒,粒子再通过离心干燥即得。Further, the preparation step of the radiation cross-linked transparent polyethylene material: pour the polyethylene base material, composite antioxidant, and cross-linking sensitizer into a high-speed mixer in parts by weight and stir for 2 to 5 minutes at a low speed Finally, the homogeneously mixed material is introduced into a twin-screw extruder, extruded at a temperature range of 140-200°C, water-cooled, stretched and blown into granules, and the granules are then dried by centrifugation.

更进一步的,所述聚乙烯基材包括高密度聚乙烯(HDPE)、低密度聚乙烯(LDPE)、线性低密度聚乙烯(LLDPE)、茂金属聚乙烯(mLLDPE)中的一种,四者的熔融指数MI为0.1~5。Further, the polyethylene substrate includes one of high-density polyethylene (HDPE), low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), metallocene polyethylene (mLLDPE), four The melt index MI is 0.1-5.

更进一步的,所述复合抗氧剂包括1~3份主抗氧剂和0.5~2份辅助抗氧剂;所述的主抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯(1010)、β-(3,5-二特丁基-4-羟基苯基)丙酸十八酯(1076)和N,N’-双[β-(3,5-二叔丁基-4-羟基苯基)丙酰]肼(1024)、二(2-甲基-5-叔丁基-4-羟基苯基)硫醚;4,4'-硫代双(6-叔丁基-3-甲基苯酚)(300)中的组合物,所述辅助抗氧剂为硫代二丙酸双十二烷酯和/或硫代二丙酸二(十八)酯;所述交联敏化剂包括三羟甲基丙烷三甲基丙烯酸酯和/或三烯丙基异三聚氰酸酯。Further, the composite antioxidant includes 1 to 3 parts of main antioxidant and 0.5 to 2 parts of auxiliary antioxidant; the main antioxidant is tetrakis[β-(3,5-di-tert-butyl -4-hydroxyphenyl) propionate] pentaerythritol ester (1010), β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate (1076) and N, N'-bis[ β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine (1024), bis(2-methyl-5-tert-butyl-4-hydroxyphenyl)sulfide; 4, Composition in 4'-thiobis(6-tert-butyl-3-methylphenol) (300), the auxiliary antioxidant is didodecyl thiodipropionate and/or dithiodipropionate Di(octadecyl)propionate; the cross-linking sensitizer includes trimethylolpropane trimethacrylate and/or triallyl isocyanurate.

进一步的,所述辐射交联无卤阻燃聚烯烃材料,由以下重量份的原料组成:聚合物基材100份,无机阻燃剂80~120份,六苯氧基环三磷腈5~10份,二乙基次磷酸铝15~30份,三聚氰胺氰尿酸盐15~30份,纳米蒙脱土1~3份,复合抗氧剂3~6份,加工助剂4~7份和环保型色母粒4~6份。Further, the radiation-crosslinked halogen-free flame-retardant polyolefin material is composed of the following raw materials in parts by weight: 100 parts of polymer substrate, 80-120 parts of inorganic flame retardant, 5-5 parts of hexaphenoxycyclotriphosphazene 10 parts, 15-30 parts of aluminum diethyl hypophosphite, 15-30 parts of melamine cyanurate, 1-3 parts of nano-montmorillonite, 3-6 parts of composite antioxidant, 4-7 parts of processing aid and 4 to 6 parts of environmentally friendly masterbatch.

更进一步的,所述聚合物基材由5~15份接枝马来酸酐的辐射接枝相容剂、15~30份聚乙烯,50~65份VA含量18~28%的乙烯-乙酸乙烯酯共聚物,5~15份乙烯-辛烯共聚物及0~10份MA含量18~28%的乙烯-甲基丙烯酸甲酯共聚物组成;其中相容剂为LDPE-g-MAH、LLDPE-g-MAH、EVA-g-MAH中的一种或组合物;其中聚乙烯为低密度聚乙烯、线性低密度聚乙烯、茂金属聚乙烯中的一种。Furthermore, the polymer substrate is composed of 5-15 parts of radiation grafting compatibilizer grafted with maleic anhydride, 15-30 parts of polyethylene, 50-65 parts of ethylene-vinyl acetate with VA content of 18-28%. Ester copolymer, composed of 5-15 parts of ethylene-octene copolymer and 0-10 parts of ethylene-methyl methacrylate copolymer with MA content of 18-28%; the compatibilizer is LDPE-g-MAH, LLDPE- One or a combination of g-MAH and EVA-g-MAH; wherein polyethylene is one of low-density polyethylene, linear low-density polyethylene, and metallocene polyethylene.

更进一步的,所述无机阻燃剂包括50~70份氢氧化铝和40~60份氢氧化镁及5~10份硼酸锌;复合抗氧剂包括2~4份主抗氧剂和1~3份辅助抗氧剂,其中,主抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯(1010)、β-(3,5-二特丁基-4-羟基苯基)丙酸十八酯(1076)和N,N’-双[β-(3,5-二叔丁基-4-羟基苯基)丙酰]肼(1024)、二(2-甲基-5-叔丁基-4-羟基苯基)硫醚;4,4'-硫代双(6-叔丁基-3-甲基苯酚)(300)中的组合物,辅助抗氧剂为硫代二丙酸双十二烷酯和/或硫代二丙酸二(十八)酯;所述加工助剂由交联敏化剂和润滑剂组成,交联敏化剂的重量份数为1~2份,润滑剂的重量份数为4~6份,其中,交联敏化剂包括三羟甲基丙烷三甲基丙烯酸酯和/或三烯丙基异三聚氰酸酯,润滑剂包括聚乙烯蜡、硬脂酸锌和硬脂酸钙、硅酮母粒及乙撑双硬脂酰胺中的一种或几种组合。Furthermore, the inorganic flame retardant includes 50-70 parts of aluminum hydroxide, 40-60 parts of magnesium hydroxide and 5-10 parts of zinc borate; the composite antioxidant includes 2-4 parts of main antioxidant and 1- 3 parts of secondary antioxidants, wherein the main antioxidant is tetrakis [β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionic acid] pentaerythritol ester (1010), β-(3,5- Di-tert-butyl-4-hydroxyphenyl) octadecyl propionate (1076) and N, N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl) propionyl]hydrazine ( 1024), bis(2-methyl-5-tert-butyl-4-hydroxyphenyl) sulfide; 4,4'-thiobis(6-tert-butyl-3-methylphenol) (300) The composition, auxiliary antioxidant is didodecyl thiodipropionate and/or di(octadecyl) thiodipropionate; The processing aid is made up of cross-linking sensitizer and lubricant, The parts by weight of the cross-linking sensitizer is 1-2 parts, and the parts by weight of the lubricant are 4-6 parts, wherein the cross-linking sensitizer includes trimethylolpropane trimethacrylate and/or triene Propyl isocyanurate, the lubricant includes one or more combinations of polyethylene wax, zinc stearate and calcium stearate, silicone masterbatch and ethylene bis-stearamide.

更进一步的,所述辐射交联无卤阻燃聚烯烃材料制备步骤:将聚合物基材、无机阻燃剂、六苯氧基环三磷腈、二乙基次磷酸铝、三聚氰胺氰尿酸盐、纳米蒙脱土、复合抗氧剂、加工助剂和环保型色母粒按份称取,先倒入高混机高速搅拌3~5分钟后,通过管道放入密炼机中密炼,熔融至110℃左右密炼翻转一次,然后密炼至130~140℃温度范围内混炼,密炼结束后提升至双阶双螺杆挤出机,在120~140℃温度范围内风冷挤出造粒即得。Furthermore, the preparation step of the radiation-crosslinked halogen-free flame-retardant polyolefin material: polymer substrate, inorganic flame retardant, hexaphenoxycyclotriphosphazene, diethyl aluminum hypophosphite, melamine cyanuric acid Salt, nano-montmorillonite, compound antioxidant, processing aids and environmentally friendly masterbatch are weighed in portions, first poured into the high-speed mixer and stirred at high speed for 3 to 5 minutes, then put into the internal mixer through the pipeline for internal mixing , melted to about 110°C and turned over once, then banburyed to a temperature range of 130-140°C for mixing, after the banburying was completed, it was lifted to a double-stage twin-screw extruder, and air-cooled extruded at a temperature range of 120-140°C It can be obtained after granulation.

所述超长寿命无卤高阻燃聚烯烃电线电缆制备方法,包括以下步骤:The preparation method of the ultra-long-life halogen-free and highly flame-retardant polyolefin wire and cable includes the following steps:

步骤一、首先制备电线,将所述辐照交联透明聚烯烃材料及所述辐照交联无卤阻燃聚烯烃材料在二台单螺杆挤出机中双层共挤出,其中内绝缘层挤出温度140~200℃,绝缘层厚度0.1~0.2mm,其中外绝缘层挤出温度120~160℃,绝缘层厚度0.5~1.2mm,制备的电线在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电线;Step 1. First, wires are prepared, and the radiation cross-linked transparent polyolefin material and the radiation cross-linked halogen-free flame-retardant polyolefin material are double-layer co-extruded in two single-screw extruders, wherein the inner insulation The layer extrusion temperature is 140-200°C, the thickness of the insulating layer is 0.1-0.2mm, the extrusion temperature of the outer insulating layer is 120-160°C, the thickness of the insulating layer is 0.5-1.2mm, and the prepared wire is irradiated at a radiation dose of 80-150kGy Cross-linking, that is, ultra-long-life halogen-free and highly flame-retardant polyolefin wires;

步骤二、将步骤一制备的电线多根搅合后进行包裹填充、阻燃包带,然后在单螺杆挤出机中,在120~160℃温度下进行护套层挤出,护套层厚度0.7~1.5mm,挤出的电缆在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电缆。Step 2. Mix multiple wires prepared in Step 1, wrap and fill, flame-retardant taping, and then extrude the sheath layer at a temperature of 120-160°C in a single-screw extruder. The thickness of the sheath layer is 0.7-1.5mm, the extruded cable is subjected to radiation cross-linking at an irradiation dose of 80-150kGy to obtain an ultra-long-life halogen-free and highly flame-retardant polyolefin cable.

本发明的有益效果在于:电线采用双层绝缘结构,绝缘电阻常数大于3670MΩ·km,阻燃通过单根垂直燃烧,电缆阻燃通过B类成束燃烧,电线和电缆使用寿命在90℃下可使用50年以上,在86℃下可使用70年以上,在70℃下可使用100年以上。The beneficial effects of the present invention are: the electric wire adopts a double-layer insulation structure, the insulation resistance constant is greater than 3670MΩ·km, the flame retardant passes through a single vertical combustion, and the cable flame retardancy passes through a B-type bundled combustion, and the service life of the electric wire and cable can be extended at 90°C. It can be used for more than 50 years, can be used for more than 70 years at 86°C, and can be used for more than 100 years at 70°C.

附图说明Description of drawings

下面结合附图和实施例对本发明做进一步的阐述。The present invention will be further elaborated below in conjunction with the accompanying drawings and embodiments.

图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.

图中:1、导体,2、内绝缘层,3、外绝缘层,4、填充阻燃,5、包带,6、护套层。In the figure: 1. Conductor, 2. Inner insulation layer, 3. Outer insulation layer, 4. Filling and flame retardant, 5. Taping, 6. Sheath layer.

具体实施方式Detailed ways

实施例1Example 1

如图1所示的一种超长寿命无卤高阻燃聚烯烃电线电缆,每根电线由最内层的导体1,和依次包裹在导体外的内绝缘层2、外绝缘层3组成,在若干根电线之间填充阻燃4并在所有电线和填充外以包带5包裹,在包带5外包裹护套层6形成电缆,所述内绝缘层为辐射交联透明聚乙烯材料制成,内绝缘层厚度0.1~0.2mm;所述外绝缘层、护套层为辐射交联无卤阻燃聚烯烃材料制成,外绝缘层厚度0.5~1.2mm,护套层厚度0.7~1.5mm。As shown in Figure 1, an ultra-long-life halogen-free and highly flame-retardant polyolefin wire and cable, each wire is composed of the innermost conductor 1, and the inner insulating layer 2 and the outer insulating layer 3 that are wrapped around the conductor in turn. Fill flame retardant 4 between several wires and wrap all the wires and filling with tape 5, wrap sheath layer 6 outside tape 5 to form a cable, and the inner insulating layer is made of radiation cross-linked transparent polyethylene material The thickness of the inner insulating layer is 0.1-0.2mm; the outer insulating layer and sheath layer are made of radiation cross-linked halogen-free flame-retardant polyolefin material, the thickness of the outer insulating layer is 0.5-1.2mm, and the thickness of the sheath layer is 0.7-1.5mm mm.

导体1材料为镀锡铜、镀银铜、镀镍铜、铜、铜包钢中任意一种。The material of the conductor 1 is any one of tin-plated copper, silver-plated copper, nickel-plated copper, copper, and copper-clad steel.

辐照交联透明聚烯烃材料由以下重量份的原料组成:聚乙烯基材100份;主抗氧剂和辅助抗氧剂构成的复合抗氧剂1.5~4.5份;交联敏化剂0.5~2.5份。The radiation cross-linked transparent polyolefin material is composed of the following raw materials in parts by weight: 100 parts of polyethylene substrate; 1.5-4.5 parts of composite antioxidant composed of main antioxidant and auxiliary antioxidant; 0.5-4.5 parts of cross-linking sensitizer 2.5 servings.

辐照交联透明聚乙烯材料的制备步骤:将聚乙烯基材、复合抗氧剂、交联敏化剂按重量份,倒入高混机低速速搅拌2~5分钟后,把混合均匀的材料导入双螺杆挤出机中,在140~200℃温度范围内挤出、水冷拉条鼓风造粒,粒子再通过离心干燥即得。Preparation steps of radiation cross-linked transparent polyethylene material: pour the polyethylene base material, composite antioxidant, and cross-linking sensitizer into a high-mixer in low-speed stirring for 2 to 5 minutes in parts by weight, and then mix the The material is introduced into a twin-screw extruder, extruded at a temperature range of 140-200°C, water-cooled, stretched and blown into granules, and the granules are then dried by centrifugation.

辐射交联无卤阻燃聚烯烃材料,由以下重量份的原料组成:聚合物基材100份,无机阻燃剂80~120份,六苯氧基环三磷腈5~10份,二乙基次磷酸铝15~30份,三聚氰胺氰尿酸盐15~30份,纳米蒙脱土1~3份,复合抗氧剂3~6份,加工助剂4~7份和环保型色母粒4~6份。The radiation cross-linked halogen-free flame-retardant polyolefin material is composed of the following raw materials in parts by weight: 100 parts of polymer substrate, 80-120 parts of inorganic flame retardant, 5-10 parts of hexaphenoxycyclotriphosphazene, diethyl 15-30 parts of aluminum hypophosphite, 15-30 parts of melamine cyanurate, 1-3 parts of nano-montmorillonite, 3-6 parts of composite antioxidant, 4-7 parts of processing aids and environmentally friendly masterbatch 4 to 6 servings.

辐射交联无卤阻燃聚烯烃材料制备步骤:将聚合物基材、无机阻燃剂、六苯氧基环三磷腈、二乙基次磷酸铝、三聚氰胺氰尿酸盐、纳米蒙脱土、复合抗氧剂、加工助剂和环保型色母粒按份称取,先倒入高混机高速搅拌3~5分钟后,通过管道放入密炼机中密炼,熔融至110℃左右密炼翻转一次,然后密炼至130~140℃温度范围内混炼,密炼结束后提升至双阶双螺杆挤出机,在120~140℃温度范围内风冷挤出造粒即得。Preparation steps of radiation crosslinked halogen-free flame-retardant polyolefin material: polymer substrate, inorganic flame retardant, hexaphenoxycyclotriphosphazene, diethyl aluminum hypophosphite, melamine cyanurate, nano-montmorillonite , compound antioxidant, processing aid and environmentally friendly masterbatch are weighed in portions, first poured into a high-speed mixer and stirred at high speed for 3 to 5 minutes, then put into an internal mixer through a pipeline for internal mixing, and melted to about 110°C The banburying is turned over once, and then the banburying is carried out to the temperature range of 130-140°C for mixing. After the banburying is completed, it is promoted to the double-stage twin-screw extruder, and the air-cooled extrusion granulation is obtained within the temperature range of 120-140°C.

超长寿命无卤高阻燃聚烯烃电线电缆制备方法,包括以下步骤:A method for preparing an ultra-long-life halogen-free and highly flame-retardant polyolefin wire and cable, comprising the following steps:

步骤一、首先制备电线,将所述辐照交联透明聚烯烃材料及所述辐照交联无卤阻燃聚烯烃材料在二台单螺杆挤出机中双层共挤出,其中内绝缘层挤出温度140~200℃,绝缘层厚度0.1~0.2mm,其中外绝缘层挤出温度120~160℃,绝缘层厚度0.5~1.2mm,制备的电线在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电线;Step 1. First, wires are prepared, and the radiation cross-linked transparent polyolefin material and the radiation cross-linked halogen-free flame-retardant polyolefin material are double-layer co-extruded in two single-screw extruders, wherein the inner insulation The layer extrusion temperature is 140-200°C, the thickness of the insulating layer is 0.1-0.2mm, the extrusion temperature of the outer insulating layer is 120-160°C, the thickness of the insulating layer is 0.5-1.2mm, and the prepared wire is irradiated at a radiation dose of 80-150kGy Cross-linking, that is, ultra-long-life halogen-free and highly flame-retardant polyolefin wires;

步骤二、将步骤一制备的电线多根搅合后进行包裹填充、阻燃包带,然后在单螺杆挤出机中,在120~160℃温度下进行护套层挤出,护套层厚度0.7~1.5mm,挤出的电缆在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电缆。Step 2. Mix multiple wires prepared in Step 1, wrap and fill, flame-retardant taping, and then extrude the sheath layer at a temperature of 120-160°C in a single-screw extruder. The thickness of the sheath layer is 0.7-1.5mm, the extruded cable is subjected to radiation cross-linking at an irradiation dose of 80-150kGy to obtain an ultra-long-life halogen-free and highly flame-retardant polyolefin cable.

实施例2Example 2

作为实施例1的进一步设计,所述聚乙烯基材包括高密度聚乙烯、低密度聚乙烯、线性低密度聚乙烯、茂金属聚乙烯中的一种,四者的熔融指数MI为0.1~5。As a further design of Example 1, the polyethylene substrate includes one of high-density polyethylene, low-density polyethylene, linear low-density polyethylene, and metallocene polyethylene, and the melt index MI of the four is 0.1-5 .

复合抗氧剂包括1~3份主抗氧剂和0.5~2份辅助抗氧剂;所述的主抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯(1010)、β-(3,5-二特丁基-4-羟基苯基)丙酸十八酯(1076)和N,N’-双[β-(3,5-二叔丁基-4-羟基苯基)丙酰]肼(1024)、二(2-甲基-5-叔丁基-4-羟基苯基)硫醚;4,4'-硫代双(6-叔丁基-3-甲基苯酚)(300)中的组合物,所述辅助抗氧剂为硫代二丙酸双十二烷酯和/或硫代二丙酸二(十八)酯;所述交联敏化剂包括三羟甲基丙烷三甲基丙烯酸酯和/或三烯丙基异三聚氰酸酯。The composite antioxidant includes 1 to 3 parts of main antioxidant and 0.5 to 2 parts of auxiliary antioxidant; the main antioxidant is tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl ) propionate] pentaerythritol ester (1010), β-(3,5-di-tert-butyl-4-hydroxyphenyl) octadecyl propionate (1076) and N, N'-bis[β-(3,5 -Di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine (1024), bis(2-methyl-5-tert-butyl-4-hydroxyphenyl)sulfide; 4,4'-thiobis The composition in (6-tert-butyl-3-methylphenol) (300), the auxiliary antioxidant is didodecyl thiodipropionate and/or dioctadecyl thiodipropionate ) ester; the crosslinking sensitizer includes trimethylolpropane trimethacrylate and/or triallyl isocyanurate.

聚合物基材由5~15份接枝马来酸酐的辐射接枝相容剂、15~30份聚乙烯,50~65份VA含量18~28%的乙烯-乙酸乙烯酯共聚物,5~15份乙烯-辛烯共聚物及0~10份MA含量18~28%的乙烯-甲基丙烯酸甲酯共聚物组成;其中相容剂为LDPE-g-MAH、LLDPE-g-MAH、EVA-g-MAH中的一种或组合物;其中聚乙烯为低密度聚乙烯、线性低密度聚乙烯、茂金属聚乙烯中的一种。The polymer substrate consists of 5-15 parts of radiation grafting compatibilizer grafted with maleic anhydride, 15-30 parts of polyethylene, 50-65 parts of ethylene-vinyl acetate copolymer with VA content of 18-28%, 5- 15 parts of ethylene-octene copolymer and 0-10 parts of ethylene-methyl methacrylate copolymer with MA content of 18-28%; the compatibilizer is LDPE-g-MAH, LLDPE-g-MAH, EVA- One or a combination of g-MAH; wherein polyethylene is one of low-density polyethylene, linear low-density polyethylene, and metallocene polyethylene.

无机阻燃剂包括50~70份氢氧化铝和40~60份氢氧化镁及5~10份硼酸锌;复合抗氧剂包括2~4份主抗氧剂和1~3份辅助抗氧剂,其中,主抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯(1010)、β-(3,5-二特丁基-4-羟基苯基)丙酸十八酯(1076)和N,N’-双[β-(3,5-二叔丁基-4-羟基苯基)丙酰]肼(1024)、二(2-甲基-5-叔丁基-4-羟基苯基)硫醚;4,4'-硫代双(6-叔丁基-3-甲基苯酚)(300)中的组合物,辅助抗氧剂为硫代二丙酸双十二烷酯和/或硫代二丙酸二(十八)酯;所述加工助剂由交联敏化剂和润滑剂组成,交联敏化剂的重量份数为1~2份,润滑剂的重量份数为4~6份,其中,交联敏化剂包括三羟甲基丙烷三甲基丙烯酸酯和/或三烯丙基异三聚氰酸酯,润滑剂包括聚乙烯蜡、硬脂酸锌和硬脂酸钙、硅酮母粒及乙撑双硬脂酰胺中的一种或几种组合。Inorganic flame retardants include 50-70 parts of aluminum hydroxide, 40-60 parts of magnesium hydroxide and 5-10 parts of zinc borate; composite antioxidants include 2-4 parts of main antioxidant and 1-3 parts of auxiliary antioxidant , wherein the primary antioxidant is tetrakis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionic acid]pentaerythritol ester (1010), β-(3,5-di-tert-butyl-4 -Hydroxyphenyl) propionate octadecyl (1076) and N, N'-bis[β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl]hydrazine (1024), two (2 -Methyl-5-tert-butyl-4-hydroxyphenyl) sulfide; 4,4'-Thiobis(6-tert-butyl-3-methylphenol) (300), auxiliary anti- Oxygen agent is didodecyl thiodipropionate and/or di(octadecyl) thiodipropionate; Described processing aid is made up of crosslinking sensitizer and lubricant, and the content of crosslinking sensitizer The parts by weight are 1 to 2 parts, and the parts by weight of the lubricant are 4 to 6 parts, wherein the crosslinking sensitizer includes trimethylolpropane trimethacrylate and/or triallyl isocyanuric acid Esters, lubricants include one or more combinations of polyethylene wax, zinc stearate and calcium stearate, silicone masterbatch and ethylene bis-stearamide.

实施例3Example 3

根据实施例1、2,制作具体辐射交联透明聚乙烯绝缘料,下表中为具体材料组合形成从四种样品。According to Examples 1 and 2, specific radiation crosslinked transparent polyethylene insulating materials were produced, and the following table shows the combination of specific materials to form four samples.

材料名称material name 样品1sample 1 样品2sample 2 样品3sample 3 样品4Sample 4 1、PE1. PE HDPE3364:100HDPE3364:100 LDPE180:100LDPE180:100 LLDPE2230:100LLDPE2230:100 mLLDPE3518:100mLLDPE3518:100 2、10102. 1010 11 11 3、10763.1076 11 11 4、10244.1024 1.51.5 1.51.5 5、3005,300 1.51.5 1.51.5 6、DLTP6. DLTP 1.51.5 22 7、DSTP7. DSTP 22 1.51.5 8、TMPTMA8. TMPTMA 1.51.5 1.51.5 9、TAIC9. TAIC 1.51.5 1.51.5

对上述四个样品所获得的辐射交联透明聚乙烯绝缘材料辐照交联后性能进行测试,测试结果如下表所示:The properties of the radiation-crosslinked transparent polyethylene insulating material obtained by the above four samples were tested after radiation crosslinking, and the test results are shown in the following table:

Figure BDA0003657050140000061
Figure BDA0003657050140000061

对样品2的热寿命进行试验,得到具体数据如下表:The heat life of sample 2 is tested, and the specific data are as follows:

Figure BDA0003657050140000062
Figure BDA0003657050140000062

Figure BDA0003657050140000071
Figure BDA0003657050140000071

按实施例1、2的配方和制备步骤,将聚合物基材,无机阻燃剂,六苯氧基环三磷腈,二乙基次磷酸铝,三聚氰胺氰尿酸盐(MCA),纳米蒙脱土,复合抗氧剂,加工助剂和环保型色母粒按不同的失重秤按配方要求,先倒入高混机高速搅拌3~5分钟后,通过管道放入密炼机中密炼,熔融至110℃左右密炼翻转一次,然后密炼至130~140℃温度范围内混炼,密炼结束后提升至双阶双螺杆挤出机,在120~140℃温度范围内风冷挤出造粒,即得辐射交联无卤阻燃聚烯烃材料辐射交联无卤阻燃聚烯烃材料实施例配方According to the formula and preparation steps of Examples 1 and 2, polymer substrates, inorganic flame retardants, hexaphenoxycyclotriphosphazene, diethyl aluminum hypophosphite, melamine cyanurate (MCA), nanometer Desoiling, compound antioxidant, processing aids and environmentally friendly masterbatches are first poured into the high-speed mixer according to the formula requirements according to different weight loss scales, and then put into the internal mixer through the pipeline for internal mixing , melted to about 110°C and turned over once, then banburyed to a temperature range of 130-140°C for mixing, after the banburying was completed, it was lifted to a double-stage twin-screw extruder, and air-cooled extruded at a temperature range of 120-140°C After granulation, the radiation cross-linked halogen-free flame-retardant polyolefin material radiation cross-linked halogen-free flame-retardant polyolefin material embodiment formula

Figure BDA0003657050140000072
Figure BDA0003657050140000072

Figure BDA0003657050140000081
Figure BDA0003657050140000081

对样品的辐射交联无卤阻燃聚烯烃材料辐照交联后性能进行测试,具体如下表:The performance of the radiation crosslinked halogen-free flame retardant polyolefin material of the sample was tested after radiation crosslinking, as shown in the following table:

Figure BDA0003657050140000082
Figure BDA0003657050140000082

对样品7的热寿命进行测试,具体数据如下表:The thermal life of sample 7 is tested, and the specific data are as follows:

Figure BDA0003657050140000083
Figure BDA0003657050140000083

Figure BDA0003657050140000091
Figure BDA0003657050140000091

将样品2制备的辐射交联透明聚乙烯内绝缘料与样品7制备的辐射交联无卤阻燃聚烯烃外绝缘料在二台单螺杆挤出机中双层共挤出,其中内绝缘层挤出温度140~180℃,绝缘层厚度0.1~0.15mm,其中外绝缘层挤出温度120~160℃,绝缘层厚度0.5~0.7mm,制备的电线规格为1.0mm2,然后制备的电线在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电线。The radiation-crosslinked transparent polyethylene inner insulating material prepared by sample 2 and the radiation-crosslinked halogen-free flame-retardant polyolefin outer insulating material prepared by sample 7 were double-layered co-extruded in two single-screw extruders, and the inner insulating layer The extrusion temperature is 140-180°C, the thickness of the insulating layer is 0.1-0.15mm , and the extrusion temperature of the outer insulating layer is 120-160°C, and the thickness of the insulating layer is 0.5-0.7mm. The irradiation dose is 80-150kGy for radiation cross-linking to obtain ultra-long-life halogen-free and highly flame-retardant polyolefin wires.

超长寿命无卤高阻燃聚烯烃电线(1mm2)性能Ultra-long life halogen-free high flame-retardant polyolefin wire (1mm 2 ) performance

Figure BDA0003657050140000092
Figure BDA0003657050140000092

将制备的超长寿命无卤高阻燃聚烯烃电线(1mm2)4根,搅合后进行包裹填充、阻燃包带,然后在单螺杆挤出机中,在120~160℃温度下进行护套层挤出,护套厚度0.8~1.0mm,挤出的电缆在辐照剂量为80~150kGy进行辐射交联,即得超长寿命无卤高阻燃聚烯烃电缆(4×1mm2)。4 ultra-long-life halogen-free and highly flame-retardant polyolefin wires (1mm 2 ) prepared were mixed together, wrapped, filled, and flame-retardant taped, and then processed in a single-screw extruder at a temperature of 120-160°C. The sheath layer is extruded, the thickness of the sheath is 0.8-1.0mm, and the extruded cable is subjected to radiation cross-linking at an irradiation dose of 80-150kGy to obtain a super-long-life halogen-free and highly flame-retardant polyolefin cable (4×1mm 2 ) .

超长寿命无卤高阻燃聚烯烃电缆(4×1mm2)性能Properties of Super Long Life Halogen Free High Flame Retardant Polyolefin Cable (4×1mm 2 )

Figure BDA0003657050140000093
Figure BDA0003657050140000093

Figure BDA0003657050140000101
Figure BDA0003657050140000101

本发明电线采用双层绝缘结构,绝缘电阻常数大于3670MΩ·km,阻燃通过单根垂直燃烧,电缆阻燃通过B类成束燃烧,电线和电缆使用寿命在90℃下可使用50年以上,在86℃下可使用70年以上,在70℃下可使用100年以上。The electric wire of the present invention adopts a double-layer insulation structure, and the insulation resistance constant is greater than 3670MΩ·km. The flame retardant passes through a single vertical combustion, and the cable flame retardancy passes through a B-type bundled combustion. The service life of the wire and cable can be used for more than 50 years at 90°C. It can be used for more than 70 years at 86°C and more than 100 years at 70°C.

尽管上文对本发明的具体实施方式给予了详细描述和说明,但是应该指明的是,我们可以依据本发明的构想对上述实施方式进行各种等效改变和修改,其所产生的功能作用仍未超出说明书所涵盖的精神时,均应在本发明的保护范围之内。Although the specific embodiments of the present invention have been described and illustrated in detail above, it should be pointed out that we can make various equivalent changes and modifications to the above-mentioned embodiments according to the concept of the present invention, and the functional effects produced by it are still the same. Anything beyond the spirit covered by the description shall be within the protection scope of the present invention.

Claims (10)

1. The utility model provides a high fire-retardant polyolefin wire and cable of nothing halogen of overlength life which characterized in that: each wire consists of an innermost conductor, an inner insulating layer and an outer insulating layer, wherein the inner insulating layer and the outer insulating layer are sequentially wrapped outside the conductor, flame retardant is filled among the wires, all the wires and the filling are wrapped by wrapping bands, a sheath layer is wrapped outside the wrapping bands to form a cable, the inner insulating layer is made of radiation cross-linked transparent polyethylene materials, and the thickness of the inner insulating layer is 0.1-0.2 mm; the outer insulating layer and the sheath layer are made of radiation cross-linking halogen-free flame-retardant polyolefin materials, the thickness of the outer insulating layer is 0.5-1.2 mm, and the thickness of the sheath layer is 0.7-1.5 mm.
2. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 1, characterized in that: the irradiation crosslinking transparent polyolefin material is prepared from the following raw materials in parts by weight: 100 parts of a polyethylene base material; 1.5-4.5 parts of composite antioxidant consisting of a main antioxidant and an auxiliary antioxidant; 0.5 to 2.5 portions of crosslinking sensitizer.
3. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 2, characterized in that: the preparation method of the irradiation crosslinking transparent polyethylene material comprises the following steps: pouring the polyethylene base material, the composite antioxidant and the crosslinking sensitizer in parts by weight into a high-speed mixer, stirring at a low speed for 2-5 minutes, introducing the uniformly mixed material into a double-screw extruder, extruding at the temperature of 140-200 ℃, carrying out water-cooling bracing and air-blast granulation, and carrying out centrifugal drying on the particles to obtain the composite antioxidant.
4. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 3, wherein: the polyethylene base material comprises one of high-density polyethylene, low-density polyethylene, linear low-density polyethylene and metallocene polyethylene, and the melt index MI of the four is 0.1-5.
5. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 3, wherein: the composite antioxidant comprises 1-3 parts of main antioxidant and 0.5-2 parts of auxiliary antioxidant; the main antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (1010), beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester (1076), N' -bis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hydrazine (1024) and bis (2-methyl-5-tert-butyl-4-hydroxyphenyl) thioether; 4,4' -thiobis (6-tert-butyl-3-methylphenol) (300), the secondary antioxidant being didodecyl thiodipropionate and/or dioctadecyl thiodipropionate; the crosslinking sensitizer includes trimethylolpropane trimethacrylate and/or triallyl isocyanurate.
6. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 1, characterized in that: the radiation crosslinking halogen-free flame retardant polyolefin material is prepared from the following raw materials in parts by weight: 100 parts of polymer base material, 80-120 parts of inorganic flame retardant, 5-10 parts of hexaphenoxycyclotriphosphazene, 15-30 parts of diethyl aluminum hypophosphite, 15-30 parts of melamine cyanurate, 1-3 parts of nano montmorillonite, 3-6 parts of composite antioxidant, 4-7 parts of processing aid and 4-6 parts of environment-friendly color master batch.
7. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 6, wherein: the polymer base material consists of 5 to 15 parts of radiation grafting compatilizer for grafting maleic anhydride, 15 to 30 parts of polyethylene, 50 to 65 parts of ethylene-vinyl acetate copolymer with 18 to 28 percent of VA content, 5 to 15 parts of ethylene-octene copolymer and 0 to 10 parts of ethylene-methyl methacrylate copolymer with 18 to 28 percent of MA content; wherein the compatilizer is one or a composition of LDPE-g-MAH, LLDPE-g-MAH and EVA-g-MAH; wherein the polyethylene is one of low density polyethylene, linear low density polyethylene and metallocene polyethylene.
8. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 6, wherein: the inorganic flame retardant comprises 50-70 parts of aluminum hydroxide, 40-60 parts of magnesium hydroxide and 5-10 parts of zinc borate; the composite antioxidant comprises 2-4 parts of main antioxidant and 1-3 parts of auxiliary antioxidant, wherein the main antioxidant is tetra [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid ] pentaerythritol ester (1010), beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionic acid octadecyl ester (1076), N' -bis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionyl ] hydrazine (1024) and bis (2-methyl-5-tert-butyl-4-hydroxyphenyl) thioether; 4,4' -thiobis (6-tert-butyl-3-methylphenol) (300), the auxiliary antioxidant being didodecyl thiodipropionate and/or dioctadecyl thiodipropionate; the processing aid comprises a crosslinking sensitizer and a lubricant, wherein the weight part of the crosslinking sensitizer is 1-2 parts, the weight part of the lubricant is 4-6 parts, the crosslinking sensitizer comprises trimethylolpropane trimethacrylate and/or triallyl isocyanurate, and the lubricant comprises one or a combination of polyethylene wax, zinc stearate, calcium stearate, silicone master batch and ethylene bis stearamide.
9. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 6, wherein: the preparation method of the radiation crosslinking halogen-free flame-retardant polyolefin material comprises the following steps: weighing the polymer base material, the inorganic flame retardant, hexaphenoxycyclotriphosphazene, diethyl aluminum hypophosphite, melamine cyanurate, nano montmorillonite, the composite antioxidant, the processing aid and the environment-friendly color master batch in parts, pouring the mixture into a high-speed mixer, stirring the mixture at a high speed for 3 to 5 minutes, putting the mixture into an internal mixer through a pipeline for internal mixing, melting the mixture to about 110 ℃, performing internal mixing and turning once, then performing internal mixing to the temperature of between 130 and 140 ℃, mixing the mixture, lifting the mixture to a double-stage double-screw extruder after the internal mixing is finished, and performing air-cooled extrusion granulation at the temperature of between 120 and 140 ℃ to obtain the composite flame retardant.
10. The ultra-long life halogen-free high flame retardant polyolefin wire and cable of claim 1, wherein: the preparation method of the halogen-free high-flame-retardant polyolefin wire and cable with the ultra-long service life comprises the following steps:
firstly, preparing a wire, and performing double-layer co-extrusion on the irradiation crosslinking transparent polyolefin material and the irradiation crosslinking halogen-free flame-retardant polyolefin material in two single-screw extruders, wherein the extrusion temperature of an inner insulating layer is 140-200 ℃, the thickness of the insulating layer is 0.1-0.2 mm, the extrusion temperature of an outer insulating layer is 120-160 ℃, the thickness of the insulating layer is 0.5-1.2 mm, and the prepared wire is subjected to radiation crosslinking at the irradiation dose of 80-150 kGy to obtain the ultra-long-service-life halogen-free high-flame-retardant polyolefin wire;
step two, mixing a plurality of wires prepared in the step one, then wrapping, filling and carrying out flame-retardant wrapping, and then extruding a sheath layer in a single-screw extruder at the temperature of 120-160 ℃, wherein the thickness of the sheath layer is 0.7-1.5 mm, and the extruded cable is subjected to radiation crosslinking at the irradiation dose of 80-150 kGy, so that the ultra-long-life halogen-free high-flame-retardant polyolefin cable is obtained.
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