CN110128738B - 一种耐漏电起痕聚乙烯护套料 - Google Patents
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Abstract
本发明公开了一种耐漏电起痕聚乙烯护套料,由95‑105份聚乙烯、1.2‑1.8份硅烷偶联剂、0.05‑0.1份DCP、0.1‑0.5份抗氧剂、0.1‑0.3份有机锡、0.5‑2.5份氯化钪、1‑3份炭黑和1‑2份润滑剂按重量份组成。本发明耐漏电起痕聚乙烯护套料不仅具有较好的耐漏电起痕性能,还具有较好的机械性能。
Description
技术领域
本发明涉及绝缘材料领域,具体涉及一种耐漏电起痕绝缘材料。
背景技术
电缆在使用时,若表面存在水分与污秽,且电场足够大时,电缆的表面会产生漏电流,电流的热量将水分蒸干,形成干燥带,并导致飞弧现象,从而产生强大的热量,使电缆表面局部碳化,长此以往,会使电缆料漏电起痕,导致电缆安全性降低,甚至导致短路。目前主要依靠添加氧化锆、氢氧化铝、氢氧化镁、氧化铝、云母等耐漏电起痕剂的方式来改善绝缘材料的耐漏电起痕性(CN102070907B),但由于所需的添加量较大,易导致材料的机械性能下降。
因此,需要一种机械性能较好的耐漏电起痕的护套料。
发明内容
本发明的目的在于提供一种机械性能较好的耐漏电起痕的护套料。为实现上述目的,本发明提供了一种耐漏电起痕聚乙烯护套料,所述护套料的重量份组成为:
所述护套料的制备步骤包括:
(1)将
按重量份放入搅拌机中搅拌后倒入挤出机料斗,经双螺杆挤出后经过冷却水槽冷却,再经过风机吹干后进行切粒,烘干,制得催化剂母料,将所述催化剂母料进行真空包装备用;
(2)将
硅烷偶联剂 1.2-1.8份
DCP 0.05-0.1份
抗氧剂 0.05-0.3份
按重量份混合均匀,制得硅烷助剂备用;
(3)将
按重量份加入搅拌机混合均匀后干燥,称量后在第一加料口加入双螺杆挤出机,在第二加料口将称量好的所述硅烷助剂加入所述双螺杆挤出机,进行接枝后通过单螺杆挤出,并进行偏心水雾切粒,充分干燥;
(4)计量、包装,得到成品。
本发明还提供了氯化钪在制备耐漏电起痕聚乙烯护套料中的应用,即氯化钪用于提高聚乙烯护套料的耐漏电起痕性能。
所述耐漏电起痕聚乙烯护套料的重量份组成为:
其中,聚乙烯包括低密度聚乙烯(LDPE)、中密度聚乙烯(MDPE)、高密度聚乙烯(HDPE)、线性低密度聚乙烯(LLDPE)、线性中密度聚乙烯(LMDPE)和线性高密度聚乙烯(LHDPE)中的一种或多种。
硅烷偶联剂包括硅烷偶联剂KH550、硅烷偶联剂KH560、硅烷偶联剂KH570和硅烷偶联剂KH460中的一种或多种。
抗氧剂包括抗氧剂1010、抗氧剂1024、抗氧剂DLTP、抗氧剂168、抗氧剂264和抗氧剂330中的一种或多种。
润滑剂包括硬脂酸、硬脂酸钙、硬脂酸镁、石蜡中的一种或多种。
氯化钪为钪元素的氯化物,常温常压下为灰白色固体,具有较高的熔点,常用作提钪原料。钪常用来制特种玻璃、轻质耐高温合金,氧化钪可用作半导体镀层的蒸镀材料,制作可变波长的固体激光器和高清晰度的电视电子枪、金属卤化物灯等。
本发明具有如下优点:本发明耐漏电起痕聚乙烯护套料不仅具有较好的耐漏电起痕性能,还具有较好的机械性能。
具体实施方式
下面结合具体实施例对本发明作进一步的详细说明。实施例中用到的设备均为本领域的常用设备。实施例中所述的DNDA-8320的生产厂商为中石化镇海炼化,LD165的生产厂商为燕山石化,HE3366的生产厂商为北欧化工,硅烷偶联剂KH560的生产厂商为杜瓦化工(上海)有限公司,DCP为阿克苏PERKADOX 14S-FL,抗氧剂1024、抗氧剂DLTP的生产厂商均为常州市博洋新材料科技有限公司,有机锡为南通濠泰化工产品有限公司生产的二月桂酸二丁基锡,氯化钪、氧化钪的生产厂商均为南京细诺化工科技有限公司,炭黑N330的生产厂商为张家港五彩化工有限公司,硬脂酸钙的生产厂商为江西宏远化工有限公司,氢氧化铝为江阴市广源超微粉有限公司生产的型号为GY902的氢氧化铝。
实施例1
一种耐漏电起痕聚乙烯护套料,由以下工艺制得:
(1)将40份LLDPE(DNDA-8320),30份LDPE(LD165)与30份HDPE(HE3366)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得聚乙烯原料;
(2)将60份抗氧剂1024与40份抗氧剂DLTP按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得抗氧剂原料;
(3)将5份所述聚乙烯原料,0.1份有机锡,0.05份所述抗氧剂原料及0.2份润滑剂(硬脂酸钙)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌3分钟,再倒入挤出机料斗,挤出机温度为160℃,经双螺杆挤出后经过冷却水槽冷却,再经过风机吹干后进行切粒,再在干燥塔中80℃烘干2小时,制得催化剂母料,将所述催化剂母料进行真空包装备用;
(4)将1.2份硅烷偶联剂KH560,0.05份DCP与0.05份所述抗氧剂原料按重量份混合均匀,制得硅烷助剂备用;
(5)将90份所述聚乙烯原料,0.5份氯化钪,1份炭黑N330,0.8份润滑剂(硬脂酸钙)及5.35份所述催化剂母料按重量份加入搅拌机中低速搅拌1分钟后高速搅拌8分钟,混合均匀后在干燥塔中60℃烘干0.5小时,经称量后加入双螺杆挤出机的第一加料口,将称量好的所述硅烷助剂加入所述双螺杆挤出机的第二加料口,经双螺杆进行接枝后通过单螺杆挤出,挤出机温度为160℃,挤出后进行偏心水雾切粒;
(6)依次进行干燥,计量,包装后,得到A1号成品。
实施例2
一种耐漏电起痕聚乙烯护套料,由以下工艺制得:
(1)将60份LLDPE(DNDA-8320),20份LDPE(LD165)与20份HDPE(HE3366)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得聚乙烯原料;
(2)将80份抗氧剂1024与20份抗氧剂DLTP按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得抗氧剂原料;
(3)将10份所述聚乙烯原料,0.3份有机锡,0.2份所述抗氧剂原料及0.5份润滑剂(硬脂酸钙)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌3分钟,再倒入挤出机料斗,挤出机温度为160℃,经双螺杆挤出后经过冷却水槽冷却,再经过风机吹干后进行切粒,再在干燥塔中80℃烘干2小时,制得催化剂母料,将所述催化剂母料进行真空包装备用;
(4)将1.8份硅烷偶联剂KH560,0.1份DCP与0.3份所述抗氧剂原料按重量份混合均匀,制得硅烷助剂备用;
(5)将95份所述聚乙烯原料,2.5份氯化钪,3份炭黑N330,1.5份润滑剂(硬脂酸钙)及11份所述催化剂母料按重量份加入搅拌机中低速搅拌1分钟后高速搅拌8分钟,混合均匀后在干燥塔中60℃烘干0.5小时,经称量后加入双螺杆挤出机的第一加料口,将称量好的所述硅烷助剂加入所述双螺杆挤出机的第二加料口,经双螺杆进行接枝后通过单螺杆挤出,挤出机温度为160℃,挤出后进行偏心水雾切粒;
(6)依次进行干燥,计量,包装后,得到A2号成品。
实施例3
一种耐漏电起痕聚乙烯护套料,由以下工艺制得:
(1)将50份LLDPE(DNDA-8320),25份LDPE(LD165)与25份HDPE(HE3366)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得聚乙烯原料;
(2)将70份抗氧剂1024与30份抗氧剂DLTP按重量份放入搅拌机中低速搅拌1分钟后高速搅拌6分钟,制得抗氧剂原料;
(3)将8份所述聚乙烯原料,0.2份有机锡,0.1份所述抗氧剂原料及0.3份润滑剂(硬脂酸钙)按重量份放入搅拌机中低速搅拌1分钟后高速搅拌3分钟,再倒入挤出机料斗,挤出机温度为160℃,经双螺杆挤出后经过冷却水槽冷却,再经过风机吹干后进行切粒,再在干燥塔中80℃烘干2小时,制得催化剂母料,将所述催化剂母料进行真空包装备用;
(4)将1.5份硅烷偶联剂KH560,0.08份DCP与0.2份所述抗氧剂原料按重量份混合均匀,制得硅烷助剂备用;
(5)将92份所述聚乙烯原料,1.5份氯化钪,2份炭黑N330,1份润滑剂(硬脂酸钙)及8.6份催化剂母料按重量份加入搅拌机中低速搅拌1分钟后高速搅拌8分钟,混合均匀后在干燥塔中60℃烘干0.5小时,经称量后加入双螺杆挤出机的第一加料口,将称量好的所述硅烷助剂加入所述双螺杆挤出机的第二加料口,经双螺杆进行接枝后通过单螺杆挤出,挤出机温度为160℃,挤出后进行偏心水雾切粒;
(6)依次进行干燥,计量,包装后,得到A3号成品。
对比实施例1
一种耐漏电起痕聚乙烯护套料,按照实施例3的制备方法进行制备,不同的是,不添加氯化钪,得到D1号成品。
对比实施例2
一种耐漏电起痕聚乙烯护套料,按照实施例3的制备方法进行制备,不同的是,将氯化钪替换成氢氧化铝,得到D2号成品。
对比实施例3
一种耐漏电起痕聚乙烯护套料,按照实施例3的制备方法进行制备,不同的是,将氯化钪替换成氧化钪,得到D3号成品。
测试
对上述A1-A3号成品和D1-D3号成品分别测试其性能,测试结果如表1所示。
表1
从表1的数据可以看出,本发明产品的耐漏电起痕性能明显优于对比例产品,且机械强度下降不明显。由于氢氧化铝的添加量较少,故对产品耐漏电起痕性能的提升不明显。这说明本发明产品具有更好的耐漏电起痕性能,同时说明氯化钪能够在保证聚乙烯护套料的机械性能的情况下,明显的改善聚乙烯护套料的耐漏电起痕性能。
需要理解到的是:虽然本发明已经通过具体实施方式对其进行了较为详细的描述,但这些描述仅是对本发明设计思路的描述,并不是对本发明设计思路的限制,在此基础上所做出的未超出权利要求保护范围的任何形式和细节的变动,均属于本发明所要保护的范围。
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