CN103524866B - 一种高压变电站电缆用绝缘护套料及其制备方法 - Google Patents

一种高压变电站电缆用绝缘护套料及其制备方法 Download PDF

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CN103524866B
CN103524866B CN201310460345.0A CN201310460345A CN103524866B CN 103524866 B CN103524866 B CN 103524866B CN 201310460345 A CN201310460345 A CN 201310460345A CN 103524866 B CN103524866 B CN 103524866B
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何成龙
何源
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Abstract

本发明公开了一种高压变电站电缆用绝缘护套料及其制备方法，其由以下重量份的原料制成：茂金属线性低密度聚乙烯60-80、等规聚丙烯25-35、EVA？10-15、氢氧化铝8-12、氢氧化镁5-10、锡酸锌4-8、硅质岩石粉12-18、聚乙烯蜡4-6、对苯二甲酸锌2-3、氧化镁1-2、二甲基硅油3-5、碱式硅酸铅2-3、偏苯三酸三烯丙酯5-10、γ-甲基丙烯酰氧基丙基三甲氧基硅烷1-2、气相白炭黑15-25、活性碳酸钙10-15、抗氧剂168？1-2、复合填料3-5。本发明护套料具有优异的机械强度和耐磨性，能有效提高电缆护套的抗磨损能力和抗冲击能力，且阻燃效果好，低烟无卤，有效解决了护套料阻燃性、机械强度、耐磨性三者之间的矛盾，延长了护套的使用寿命，保证高压变电站电缆的正常工作。

Description

一种高压变电站电缆用绝缘护套料及其制备方法
技术领域
本发明涉及一种电缆护套料及其制备方法，具体涉及一种高压变电站电缆用绝缘护套料及其制备方法。
背景技术
电缆护套是电缆不可缺少的中间结构部分，起着保护电缆的作用，保证电缆的通电安全，让铜丝和水、空气等介质隔绝，避免出现漏电现象。目前高压电缆的护套材料采用聚乙烯材料，为了保证护套的低烟无卤阻燃功能，通常采用聚乙烯体系中添加大量无机氢氧化铝、氢氧化镁阻燃体系，导致护套材料的机械强度低，耐磨性差，造成在安装敷设过程中护套容易破损，从而影响电缆的正常运行。
发明内容
本发明的目的在于针对现有技术的不足，提供一种机械强度高、耐磨性好、阻燃效果好的高压变电站电缆用绝缘护套料及其制备方法，延长护套的使用寿命。
本发明采用的技术方案如下：
一种高压变电站电缆用绝缘护套料，由以下重量份的原料制成：茂金属线性低密度聚乙烯60-80、等规聚丙烯25-35、EVA10-15、氢氧化铝8-12、氢氧化镁5-10、锡酸锌4-8、硅质岩石粉12-18、聚乙烯蜡4-6、对苯二甲酸锌2-3、氧化镁1-2、二甲基硅油3-5、碱式硅酸铅2-3、偏苯三酸三烯丙酯5-10、γ-甲基丙烯酰氧基丙基三甲氧基硅烷1-2、气相白炭黑15-25、活性碳酸钙10-15、抗氧剂1681-2、复合填料3-5；
所述复合填料的制备方法如下：a、按重量比4-6:3-5:2-3称取膨润土、重晶石、独居石，再加入膨润土重量2-3%的煤粉、1-2%的活性炭，混合均匀后540-560℃煅烧3-5h，冷却至常温后粉碎粒径至15μm以下，然后加水打浆制成浓度为40-50%的浆液，加入浓度为10-15%的盐酸溶液调节浆液PH至4.5-5.5，70-80℃水浴加热2-3h，再用浓度为10-15%的氢氧化钠溶液调节PH至中性，然后加入浆液重量2-3%的壬基酚聚氧乙烯醚、3-4%的十二烷基硫酸钠、2-3%的N,N-二(羟基乙基)椰油酰胺、1-2%的粉煤灰、2-3%的聚乙二醇和3-5%的硅酸钠，高速研磨浆料粒径至10μm以下，喷雾干燥成粉末；b、向上述制得的粉末中加入2-3%的玉石粉、1-2%的锆英粉、3-4%的聚丙烯酸钠、1-2%的壳聚糖和0.5-1%的四异丙基二(二辛基亚磷酸酰氧基)钛酸酯，高速剪切分散10-15min即可。
一种高压变电站电缆用绝缘护套料的制备方法，包括以下步骤：将高速捏合机加热至55-65℃，加入等规聚丙烯、EVA、对苯二甲酸锌、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、锡酸锌、复合填料，捏合4-6min；然后升温至80-85℃，加入茂金属线性低密度聚乙烯、偏苯三酸三烯丙酯、氢氧化铝、氢氧化镁、硅质岩石粉、聚乙烯蜡、二甲基硅油、气相白炭黑，捏合5-8min，再加入其余原料，继续捏合3-4min，降温至45℃以下即可出料；然后将混合料投入双螺杆挤出机进行挤出造粒，双螺杆挤出机的工作温度为150-170℃，最后经风冷、筛选磁选、计量、包装，即得所需的护套料。
本发明的有益效果：
本发明护套料具有优异的机械强度和耐磨性，能有效提高电缆护套的抗磨损能力和抗冲击能力，且阻燃效果好，低烟无卤，有效解决了护套料阻燃性、机械强度、耐磨性三者之间的矛盾，延长了护套的使用寿命，保证高压变电站电缆的正常工作。
具体实施方式
一种高压变电站电缆用绝缘护套料，由以下重量（kg）的原料制成：茂金属线性低密度聚乙烯70、等规聚丙烯30、EVA10、氢氧化铝10、氢氧化镁8、锡酸锌6、硅质岩石粉16、聚乙烯蜡5、对苯二甲酸锌2.5、氧化镁1.5、二甲基硅油4、碱式硅酸铅2、偏苯三酸三烯丙酯8、γ-甲基丙烯酰氧基丙基三甲氧基硅烷1、气相白炭黑20、活性碳酸钙12、抗氧剂1681、复合填料4；
所述复合填料的制备方法如下：a、按重量比6:4:3称取膨润土、重晶石、独居石，再加入膨润土重量2%的煤粉、1.5%的活性炭，混合均匀后560℃煅烧3h，冷却至常温后粉碎粒径至15μm以下，然后加水打浆制成浓度为45%的浆液，加入浓度为10%的盐酸溶液调节浆液PH至4.5，75℃水浴加热2h，再用浓度为12%的氢氧化钠溶液调节PH至中性，然后加入浆液重量2%的壬基酚聚氧乙烯醚、3%的十二烷基硫酸钠、2%的N,N-二(羟基乙基)椰油酰胺、1.5%的粉煤灰、2%的聚乙二醇和4%的硅酸钠，高速研磨浆料粒径至10μm以下，喷雾干燥成粉末；b、向上述制得的粉末中加入2%的玉石粉、1.5%的锆英粉、3%的聚丙烯酸钠、1%的壳聚糖和0.5%的四异丙基二(二辛基亚磷酸酰氧基)钛酸酯，高速剪切分散10min即可。
一种高压变电站电缆用绝缘护套料的制备方法，包括以下步骤：将高速捏合机加热至55-65℃，加入等规聚丙烯、EVA、对苯二甲酸锌、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、锡酸锌、复合填料，捏合5min；然后升温至80-85℃，加入茂金属线性低密度聚乙烯、偏苯三酸三烯丙酯、氢氧化铝、氢氧化镁、硅质岩石粉、聚乙烯蜡、二甲基硅油、气相白炭黑，捏合7min，再加入其余原料，继续捏合3min，降温至45℃以下即可出料；然后将混合料投入双螺杆挤出机进行挤出造粒，双螺杆挤出机的工作温度为150-170℃，最后经风冷、筛选磁选、计量、包装，即得所需的护套料。
制得的护套料的性能测试结果如下：

Claims (2)

1.一种高压变电站电缆用绝缘护套料，其特征在于，由以下重量份的原料制成：茂金属线性低密度聚乙烯60-80、等规聚丙烯25-35、EVA10-15、氢氧化铝8-12、氢氧化镁5-10、锡酸锌4-8、硅质岩石粉12-18、聚乙烯蜡4-6、对苯二甲酸锌2-3、氧化镁1-2、二甲基硅油3-5、碱式硅酸铅2-3、偏苯三酸三烯丙酯5-10、γ-甲基丙烯酰氧基丙基三甲氧基硅烷1-2、气相白炭黑15-25、活性碳酸钙10-15、抗氧剂1681-2、复合填料3-5；
所述复合填料的制备方法如下：
a、按重量比4-6:3-5:2-3称取膨润土、重晶石、独居石，再加入膨润土重量2-3%的煤粉、1-2%的活性炭，混合均匀后540-560℃煅烧3-5h，冷却至常温后粉碎粒径至15μm以下，然后加水打浆制成浓度为40-50%的浆液，加入浓度为10-15%的盐酸溶液调节浆液pH至4.5-5.5，70-80℃水浴加热2-3h，再用浓度为10-15%的氢氧化钠溶液调节pH至中性，然后加入浆液重量2-3%的壬基酚聚氧乙烯醚、3-4%的十二烷基硫酸钠、2-3%的N,N-二(羟基乙基)椰油酰胺、1-2%的粉煤灰、2-3%的聚乙二醇和3-5%的硅酸钠，高速研磨浆料粒径至10μm以下，喷雾干燥成粉末；
b、向上述制得的粉末中加入2-3%的玉石粉、1-2%的锆英粉、3-4%的聚丙烯酸钠、1-2%的壳聚糖和0.5-1%的四异丙基二(二辛基亚磷酸酰氧基)钛酸酯，高速剪切分散10-15min即可。
2.如权利要求1所述的高压变电站电缆用绝缘护套料的制备方法，其特征在于包括以下步骤：将高速捏合机加热至55-65℃，加入等规聚丙烯、EVA、对苯二甲酸锌、γ-甲基丙烯酰氧基丙基三甲氧基硅烷、锡酸锌、复合填料，捏合4-6min；然后升温至80-85℃，加入茂金属线性低密度聚乙烯、偏苯三酸三烯丙酯、氢氧化铝、氢氧化镁、硅质岩石粉、聚乙烯蜡、二甲基硅油、气相白炭黑，捏合5-8min，再加入其余原料，继续捏合3-4min，降温至45℃以下即可出料；然后将混合料投入双螺杆挤出机进行挤出造粒，双螺杆挤出机的工作温度为150-170℃，最后经风冷、筛选磁选、计量、包装，即得所需的护套料。
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