CN102153812A - Polyolefine sheathing compound for coaxial cable and preparation method thereof - Google Patents

Polyolefine sheathing compound for coaxial cable and preparation method thereof Download PDF

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CN102153812A
CN102153812A CN 201010604933 CN201010604933A CN102153812A CN 102153812 A CN102153812 A CN 102153812A CN 201010604933 CN201010604933 CN 201010604933 CN 201010604933 A CN201010604933 A CN 201010604933A CN 102153812 A CN102153812 A CN 102153812A
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coaxial cable
high
parts
polyolefin
sheath material
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CN102153812B (en )
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祁建强
郭涛
程庆
谢明星
史亮
王僧山
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金发科技股份有限公司
上海金发科技发展有限公司
绵阳东方特种工程塑料有限公司
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Abstract

The invention discloses a polyolefine sheathing compound for a coaxial cable and a preparation method thereof. The sheathing compound consists of the following components in parts by weight: 60-90 parts of ethylene-propylene-diene rubber, 5-25 parts of high-density polyethylene, 5-15 parts of functional polyolefin resin, 180-200 parts of flame retardant, 1-3 parts of surface modifier, 0.01-0.05 part of crosslinking agent, 0.5-2 parts of antioxidant and 1.5-9 parts of processing aid. The preparation method comprises the following steps of: putting the flame retardant into a high-speed stirrer for stirring at a high speed at the temperature of not lower than 80 DEG C; adding organosilane and stirring for 3-5 minutes; putting the remaining materials into the high-speed stirrer for continually stirring for 3-5 minutes; adding into a double-screw mixing extruder set by using a feeder for pelletizing; and drying. The sheathing compound has the advantages of flame retardance, low smoke, freeness from halogen, low toxicity, freeness from harmful heavy metals such as lead, cadmium and the like, freeness from phosphorus, difficulty in burning and small smog harm in case of fire, environmental friendliness, high temperature resistance level of 105 DEG C, high extruding performance, excellent electric performance, no need of subsequent crosslinking after stranding, saving in a large amount of manpower and materials and great reduction in the manufacturing period of the cable.

Description

一种同轴电缆用聚烯烃护套料及其制备方法 A coaxial cable with a polyolefin sheath material and its preparation method

技术领域 FIELD

[0001] 本发明涉及一种同轴电缆用聚烯烃塑料,尤其涉及一种热塑性105°C低烟无卤阻燃聚烯烃护套料,本发明还提供一种同轴电缆用聚烯烃护套料的制备方法。 [0001] The present invention relates to a coaxial cable with a polyolefin plastic, in particular, relates to a thermoplastic polyolefin 105 ° C LSZH sheathing material, the present invention also provides a coaxial cable with a polyolefin sheath preparation material.

背景技术 Background technique

[0002] 同轴电缆由于其特殊的结构特性,使其具备辐射损耗小,受外界干扰影响小的特点,广泛应用于数字信号和模拟信号的传输。 [0002] The coaxial cable because of its special structural characteristics, it has little radiation loss, little external interference, are widely used to transmit digital signals and analog signals. 由于其对性能的苛刻要求,因此对塑料护套的要求也较高,如高耐温等级、长久的使用寿命、优异的电气和物理性能,户内使用的电缆还需要具备阻燃等级,目前更有满足无卤低烟的要求趋向。 Because of its stringent performance requirements, thus requiring higher plastic sheath, such as high temperature levels, long life, excellent electrical and physical properties of the cable used indoors also need to have flame-retardant grades, the current more to meet the requirements of low smoke halogen-free trend. 常规的聚氯乙烯护套虽物理性能优异,但电气性能一般,且无法满足无卤低烟阻燃的要求,而低烟无卤阻燃聚烯烃护套又不耐高温,物理性能较差,通常都采用热固性处理以消除以上缺陷,但其成缆后需要将整条电缆在电子加速机中进行电子束辐照交联,因此制造成本大,生产效率低。 Conventional PVC sheathed although excellent physical properties, but in general electrical performance, and can not meet the requirements of halogen-free flame retardant, and LSZH polyolefin sheath without high temperature, poor physical properties, usually a thermosetting treatment to eliminate the above drawbacks, but the cabling necessary for the entire cable electron beam irradiation crosslinking electron acceleration machine, therefore, large manufacturing cost, production efficiency is low.

[0003] 中国专利02111063. 8公开了一种低烟无卤阻燃聚烯烃电缆线,其成分包括:(1) 乙烯-醋酸乙烯酯聚合物,(2)高密度聚乙烯,(3)阻燃剂A,(4)阻燃剂B,(5)相容剂,(6) 抗氧剂A,(7)抗氧剂B,(8)润滑剂,(9)交联剂。 [0003] Chinese Patent No. 02111063.8 discloses a cable LSZH polyolefin having a composition comprising: (1) an ethylene - vinyl acetate polymers, (2) high density polyethylene, (3) resistance retardants A, (4) a flame retardant B, (5) a compatibilizer, (6) antioxidant A, (7) an antioxidant B, (8) a lubricant, (9) a crosslinking agent. 其优点在于,产生烟雾少,腐蚀性和毒性较低,但其阻燃剂含磷,且其电气性能不佳。 This has the advantage that the low generation of smoke, less corrosive and toxic, the phosphorus-containing flame retardant but its poor, and its electrical properties.

[0004] 中国专利200910051916. 9公开了一种太阳能电缆用辐照交联无卤阻燃绝缘料, 包括如下组分:(1)基础树脂,(2)功能化聚烯烃树脂,(3)阻燃剂,(4)表面改性剂,(5) 一级硬酯酸,(6)抗氧剂,(7)紫外线吸收剂,(8)抗铜剂,(9)润滑剂(10)交联敏化剂。 [0004] Chinese patent 200910051916.9 discloses a solar irradiation crosslinked cable halogen free flame retardant insulation material, comprising the following components: (1) a base resin, (2) a functionalized polyolefin resin, (3) resistance flame retardant, (4) surface modifier, (5) a stearate, (6) an antioxidant, (7) an ultraviolet absorber, (8) anti-copper agent, (9) the lubricant (10) cross United sensitizer. 其优点在于,挤出加工性能好、电气性能优良,但其抗老化性能不佳,使用过程中容易脆化变形, 从而影响使用。 The advantage that good extrusion processability, excellent electrical properties, but its poor anti-aging properties, embrittlement during use easily deformed, thus affecting the.

发明内容 SUMMARY

[0005] 本发明的目的在于克服现有热固性低烟无卤阻燃聚烯烃护套存在的不足,提供一种免辐照交联,即用热塑性塑料护套满足在105°C下长期工作、使用寿命长、无卤低烟阻燃、 优良的电气性能和物理性能的同轴电缆用热塑性105°C低烟无卤阻燃聚烯烃护套料。 [0005] The object of the present invention is to overcome the disadvantages of the prior thermosetting polyolefin sheath LSZH present, there is provided a radiation crosslinking Free, i.e. with a thermoplastic sheath to meet long-term work at 105 ° C, long life, halogen-free flame retardant, excellent electrical and physical properties of the coaxial cable 105 ° C LSZH thermoplastic polyolefin sheath material.

[0006] 本发明的另一目的在于提供一种流程简单、连续、生产效率高、产品质量稳定的同轴电缆用热塑性低烟无卤阻燃聚烯烃护套料的制备方法。 [0006] Another object of the present invention is to provide a simple process, the continuous, high production efficiency, product quality and stability of the prepared coaxial cable LSZH thermoplastic polyolefin sheath material.

[0007] 为了实现上述目的,本发明采用如下技术方案: [0007] To achieve the above object, the present invention adopts the following technical solution:

同轴电缆用热塑性聚烯烃护套料,按重量份由如下组份组成: Thermoplastic polyolefin coaxial cable sheathing materials, in parts by weight of components consisting of the following:

三元乙丙橡胶 60-90 EPDM 60-90

高密度聚乙烯 5-25 High density polyethylene 5-25

功能化聚烯烃树脂 5-15 Functionalized polyolefin resin 5-15

阻燃剂 180-200 Flame retardants 180-200

表面改性剂 1-3 Surface modifier 1-3

交联剂 0. 01-0. 05抗氧剂 0. 5-2 01-0 crosslinking agent 0. 05 0. antioxidants 5-2

加工助剂 1. 5-9 Processing aids 1. 5-9

所述三元乙丙橡胶是乙烯-丙烯-乙叉降冰片烯的共聚物。 The EPDM is an ethylene - propylene - copolymer ethylidene norbornene. 该乙烯-丙烯-乙叉降冰片烯的共聚物的125°C门尼粘度为20-50,由50-80%重量的乙烯、15-45%重量的丙烯、0. 5-5% 重量的乙叉降冰片烯共聚物组成。 The ethylene - propylene - 125 ° C Mooney viscosity ethylidene norbornene copolymer of 20-50, 50-80% by weight of a propylene ethylene, 15-45% by weight, and 05-5% by weight. ethylidene norbornene copolymer.

[0008] 所述高密度聚乙烯的熔指为6-lOg/lOmin。 [0008] The high-density polyethylene melt index of 6-lOg / lOmin.

[0009] 所述功能化聚烯烃树脂为马来酸酐接枝线性低密度聚乙烯、马来酸酐接枝高密度聚乙烯或马来酸钙接枝聚烯烃弹性体的一种。 [0009] The functionalized polyolefin resin is a maleic anhydride grafted linear low density polyethylene, a maleic anhydride grafted high density polyethylene or maleic grafted polyolefins calcium is an elastomer.

[0010] 优选的,所述助燃剂为氢氧化铝。 [0010] Preferably, the oxidant is aluminum hydroxide.

[0011] 优选的,所述表面改性剂为有机硅烷。 [0011] Preferably, the surface modifying agent is an organosilane.

[0012] 所述交联剂为过氧化二异丙苯或2,5-二甲基-2,5-双(叔丁基过氧基)己烷。 [0012] The crosslinking agent is dicumyl peroxide or 2,5-dimethyl-2,5-bis (tert-butylperoxy) hexane.

[0013] 所述抗氧剂为四[甲基-β_(3,5-二叔丁基-4-羟基苯基)丙酸酯]季戊四醇酯和亚磷酸酯抗氧剂的混合物,或四[甲基-β- (3,5-二叔丁基-4-羟基苯基)丙酸酯]季戊四醇酯和硫酯抗氧剂的混合物。 [0013] The antioxidant is [methyl -β_ (3,5- di-tert-butyl-4-hydroxyphenyl) propionate] and a mixture of four pentaerythritol phosphite antioxidants, or tetrakis [ methyl -β- (3,5- di-tert-butyl-4-hydroxyphenyl) propionate] pentaerythritol thioester antioxidants, and mixtures thereof.

[0014] 优选的,所述抗氧剂为瑞士汽巴公司制造的IrganoxlOlO和IrganOX168的混合物。 [0014] Preferably, the antioxidant mixture is IrganOX168 IrganoxlOlO and Ciba Corporation.

[0015] 所述加工助剂为高分子量硅酮和聚乙烯蜡的混合物。 The [0015] processing aid is a mixture of high molecular weight silicone and polyethylene wax.

[0016] 本发明中,同轴电缆用热塑性聚烯烃护套料的制备方法,包括如下步骤:将阻燃剂放在高速搅拌机中高速搅拌至温度不低于80°C,加入有机硅烷后搅拌3-5分钟,将剩余物料投入高速搅拌机中继续搅拌3-5分钟,用喂料器加入双螺杆混炼挤出机组造粒,后干燥。 [0016] In the present invention, method for preparing the coaxial cable sheath of thermoplastic polyolefin material, comprising the steps of: a flame retardant in the high speed mixer at high speed stirring to a temperature of not lower than 80 ° C, the organosilane stirred 3-5 minutes, and the remaining material was stirred into a high speed mixer continued for 3-5 minutes, is added with a twin-screw kneading extruder feeder unit pelletized, and dried.

[0017] 优选的,上述高速混合机使用水平式浆叶,混合机工作电流60-130A。 [0017] Preferably, in the high-speed mixer using horizontal blades, a mixer operating current of 60-130A.

[0018] 优选的,所使用的双螺杆混炼挤出机四个温度区域为:加料段130°C,混炼段140°C,造粒段145°C,机头150°C。 [0018] Preferably, the use of twin-screw kneading extruder is four temperature zones: feed zone 130 ° C, kneading sections 140 ° C, granulated section 145 ° C, handpiece 150 ° C.

[0019] 本发明所述的同轴电缆用热塑性聚烯烃护套料及其制备方法,其优点在于,阻燃、 低烟、无卤、低毒、不含铅、镉等有害重金属、无磷、发生火灾时不易燃烧且烟雾危害小,不会对环境造成危害,同时其具备105°C高耐温等级,挤出性能优良,电气性能优异,成缆后不需后期交联,节省大量人力、物力,极大缩短电缆的制造周期。 [0019] The thermoplastic polyolefin sheath coaxial feed and preparation method of the present invention has the advantage that fire-retardant, low smoke, low toxicity, lead, cadmium and other harmful heavy metals, phosphorus, when fire nonflammable and less hazardous smoke, will not cause harm to the environment, while 105 ° C comprising a high temperature rating, excellent extrusion properties, excellent electrical properties, post-crosslinking after cabling does not need to save a lot of manpower, material, greatly shorten the manufacturing cycle of the cable.

[0020] [0020]

具体实施方式 detailed description

[0021] 实施例中的各组分含量按表1所述。 [0021] The content of each component in Table 1, in the embodiment.

[0022] 实施例1 [0022] Example 1

组份按表1所示,制备方法包括如下步骤:将阻燃剂放在高速搅拌机中高速搅拌至温度不低于80°c,加入有机硅烷后搅拌3-5分钟,将剩余物料投入高速搅拌机中继续搅拌3-5 分钟,用喂料器加入双螺杆混炼挤出机组造粒,后干燥。 Table components, as shown in Preparation 1 comprising the steps of: a flame retardant on a high-speed high-speed stirring mixer and stirred to a temperature of not lower than 80 ° c, the organosilane 3-5 minutes, and the remaining material into a high speed mixer the stirring was continued for 3-5 min, using a twin-screw kneading extruder feeder unit granulated, and dried.

[0023] 实施例2 [0023] Example 2

组份按表1,制备方法同实施例一。 Components in Table 1, prepared in Example a.

[0024] 实施例3 [0024] Example 3

组份按表1,制备方法同实施例一。 Components in Table 1, prepared in Example a. [0025] 实施例4 [0025] Example 4

组份按表1,制备方法同实施例一。 Components in Table 1, prepared in Example a.

[0026] 对比例均采用现有技术,其组分如表1所述。 [0026] Comparative prior art are used, which components as described in Table 1.

[0027] 对比例1 [0027] Comparative Example 1

EVA75份、HDPE25份、氢氧化铝50份、氢氧化镁65份、接枝EVAlO份、ZnBl. 5份、抗氧剂1. 5份、润滑剂3. 5份、交联剂7. 5份。 EVA75 parts, HDPE25 parts, 50 parts of aluminum hydroxide, magnesium hydroxide, 65 parts of the graft parts EVAlO, ZnBl. 5 parts, 1.5 parts antioxidant, 3.5 parts of a lubricant, 7.5 parts of a crosslinking agent .

[0028] 对比例2 [0028] Comparative Example 2

挤出树脂50份、功能化聚烯烃树脂10份、阻燃剂80份、表面改性剂1份、抗氧剂1份、 紫外线吸收剂0. 1份、润滑剂1份、交联敏化剂2份。 50 parts of the extruded resin, 10 parts of functionalized polyolefin resin, a flame retardant 80 parts, 1 part of a surface modifying agent, 1 part of an antioxidant, 0.1 parts of an ultraviolet absorber, a lubricant, 1 part of a crosslinking sensitizing agent 2 parts.

[0029] 对比例3 [0029] Comparative Example 3

挤出树脂80份、高密度聚乙烯10份、阻燃剂40份、表面改性剂3份、抗氧剂5份、加工助剂5份。 80 parts of the extruded resin, 10 parts high-density polyethylene, a flame retardant 40 parts, 3 parts of surface modifier, 5 parts of antioxidant, 5 parts of processing aids.

[0030] [0030]

表1聚烯烃护套料的组分配比 Table 1 sets polyolefin sheath material distribution ratio

Figure CN102153812AD00051

表2聚烯烃护套料的物理性能 Table 2 Physical properties of polyolefin sheath material

Figure CN102153812AD00052

用实施例和对比例中制备的产品进行检测,性能指标表2所示。 Detection, performance shown in Table 2 was prepared using the product of Example and Comparative Examples. 热空气老化为(136士2)°CX 168小时,高温压力试验为105°C X4小时,指标项为国家规定应当达到的标准值,典型值项为实施例样品测试的性能。 As hot air aging (136 persons 2) ° CX ​​168 hours, high temperature pressure test of 105 ° C X4 hours, the standard value for the index entries should reach the state, typical values ​​of Performance embodiment term samples tested embodiment.

[0031] 根据测定结果显示,本发明所述的聚烯烃护套料具有良好的拉伸强度和断裂伸长率,其抗老化性能优良且具有良好的电气性能,相对于中国专利02111063. 8,中国专利200910051916. 9的绝缘料或护套料,其在力学、电学等性能上均有明显改善。 [0031] The measurement results showed that the polyolefin sheath material of the present invention have good tensile strength and elongation at break, excellent in its anti-aging properties and good electrical properties, with respect to the Chinese patent 02111063.8, Chinese Patent insulating material or sheath material 200910051916.9, which showed significant improvement in the mechanical, electrical and other properties.

[0032] 以上实施例仅用于对本发明进行说明,并不构成对权力要求范围的限制,本领域技术人员可以想到的其他替代手段,均在本发明权力要求范围内。 Other alternatives [0032] The foregoing embodiments are merely used to illustrate the present invention, not to limit the scope of the claims, one skilled in the art can think of power in the present invention are within the scope of the claims.

Claims (11)

  1. 1. 一种同轴电缆用聚烯烃护套料,其特征在于,组分按重量份包括: 三元乙丙橡胶 60-90高密度聚乙烯 5-25功能化聚烯烃树脂 5-15阻燃剂 180-200表面改性剂 1-3交联剂 0. 01-0. 05抗氧剂 0. 5-2加工助剂 1.5-9。 1. A coaxial cable with a polyolefin sheath material, wherein the components in parts by weight comprises: high density polyethylene EPDM 60-90 5-25 5-15 retardant polyolefin resin functionalized 180-200 agent surface modifier crosslinker 1-3 0.05 01-0. 05 5-2 0. antioxidant processing aids 1.5-9.
  2. 2.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述三元乙丙橡胶的125°C门尼粘度为20-50,由50-80%重量的乙烯、15-45%重量的丙烯、0. 5_5%重量的乙叉降冰片烯共聚物组成。 The coaxial cable with a polyolefin sheath material according to claim 1, wherein the EPDM rubber is 125 ° C Mooney viscosity of 20-50, 50-80% by weight of ethylene , 15-45% by weight of propylene, 0. 5_5% by weight of ethylidene norbornene copolymer.
  3. 3.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述的高密度聚乙烯的熔指为6-lOg/lOmin。 A coaxial cable according to claim polyolefin sheath material of claim 1, wherein said high-density polyethylene melt index of 6-lOg / lOmin.
  4. 4.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述功能化聚烯烃树脂为马来酸酐接枝线性低密度聚乙烯、马来酸酐接枝高密度聚乙烯或马来酸钙接枝聚烯烃弹性体的一种。 The coaxial cable according to a polyolefin sheath material as claimed in claim 1, wherein said functionalized polyolefin resin is a maleic anhydride grafted linear low density polyethylene, maleic anhydride-grafted high-density polyethylene An ethylene or maleate grafted polyolefin elastomer.
  5. 5.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述的助燃剂为氢氧化铝。 The coaxial cable according to a polyolefin sheath material according to claim 1, wherein said oxidant is aluminum hydroxide.
  6. 6.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述的表面改性剂为有机硅烷。 6. The coaxial cable according to a polyolefin sheath material according to claim 1, wherein said surface modifying agent is an organosilane.
  7. 7.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述交联剂为过氧化二异丙苯或2,5-二甲基-2,5-双(叔丁基过氧基)己烷。 The coaxial cable according to a polyolefin sheath material as claimed in claim 1, wherein the crosslinking agent is dicumyl peroxide or peroxodisulfate 2,5-dimethyl-2,5-bis ( tert-butylperoxy) hexane.
  8. 8.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述抗氧剂为四[甲基-β- (3,5-二叔丁基-4-羟基苯基)丙酸酯]季戊四醇酯和亚磷酸酯抗氧剂的混合物, 或四[甲基(3,5_ 二叔丁基-4-羟基苯基)丙酸酯]季戊四醇酯和硫酯抗氧剂的混合物。 8. The coaxial cable polyolefin sheath material of claim 1, wherein the antioxidant is tetrakis [methyl -β- (3,5- di-tert-butyl-4-hydroxyphenyl ) propionate] pentaerythritol and a mixture of phosphite antioxidants, or tetrakis [methylene (3,5_ di-t-butyl-4-hydroxyphenyl) propionate] and pentaerythritol thioester antioxidants mixture.
  9. 9.根据权利要求1所述的同轴电缆用聚烯烃护套料,其特征在于,所述加工助剂为高分子量硅酮和聚乙烯蜡的混合物。 9. The coaxial cable of a polyolefin sheath material of claim 1, wherein said processing aid is a mixture of high molecular weight silicone and polyethylene wax.
  10. 10. 一种同轴电缆用聚烯烃护套料的制备方法,其特征在于包括如下步骤:将阻燃剂放在高速搅拌机中高速搅拌至温度不低于80°c,加入有机硅烷后搅拌3-5分钟,将剩余物料投入高速搅拌机中继续搅拌3-5分钟,用喂料器加入双螺杆混炼挤出机组造粒,后干燥。 10. A method for preparing a coaxial cable with a polyolefin sheath material, comprising the steps of: a flame retardant on a high-speed high-speed stirring mixer and stirred to a temperature of not lower than 80 ° c, the organosilane 3 5 minutes, the remaining material into the high speed mixer continued stirring for 3-5 minutes, is added with a twin-screw kneading extruder feeder unit pelletized, and dried.
  11. 11.根据权利要求10所述同轴电缆用聚烯烃护套料的制备方法,其特征在于,所述的双螺杆挤出机四个温度区域为:加料段130°C,混炼段140°C,造粒段145°C,机头150°C。 11. A method of preparing the sheath 10 of the coaxial cable with a polyolefin material according to claim, wherein said twin-screw extruder to four temperature zones: feed zone 130 ° C, 140 ° kneading segment C, granulated section 145 ° C, handpiece 150 ° C.
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CN103012940B (en) * 2012-09-29 2015-04-15 深圳市沃尔核材股份有限公司 High temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material and method for preparing high temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material
CN103012940A (en) * 2012-09-29 2013-04-03 深圳市沃尔核材股份有限公司 High temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material and method for preparing high temperature self-crosslinking halogen-free flame retardant cable insulation material or sheath material
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CN103524844B (en) * 2013-09-30 2016-05-04 芜湖航天特种电缆厂 A cable sheath of high temperature resistant materials and preparation method
CN103524896A (en) * 2013-09-30 2014-01-22 江苏达胜高聚物有限公司 Halogen-free insulated cable material for irradiation crosslinking EPCV photovoltaics at temperature of 125 DEG C and preparation method
CN103524844A (en) * 2013-09-30 2014-01-22 芜湖航天特种电缆厂 High-temperature-resistant cable sheath material and preparation method thereof
CN104112516A (en) * 2014-07-01 2014-10-22 江苏天诚智能集团有限公司 Low temperature difference triggering type temperature sensing cable
CN104517678A (en) * 2015-01-20 2015-04-15 中利科技集团股份有限公司 Cable for high-voltage connection inside electric automobile
CN104961965A (en) * 2015-07-14 2015-10-07 中广核三角洲(中山)高聚物有限公司 Halogen-free polyolefin cable material with high temperature resistance and antiblocking function for outdoor optical cable and preparation method thereof
CN105542322A (en) * 2015-12-16 2016-05-04 江苏亨通线缆科技有限公司 Temperature-resistant oil-resistant flame-retardant locomotive cable
CN105504535A (en) * 2015-12-16 2016-04-20 江苏亨通线缆科技有限公司 Distribution cable for rail transit vehicle
CN105885248A (en) * 2016-06-14 2016-08-24 芜湖航飞科技股份有限公司 Silane crosslinked rubber cable sheath material

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