CN103122138B - 电力电缆用tpu/sebs热塑性弹性体绝缘料及其制备方法 - Google Patents
电力电缆用tpu/sebs热塑性弹性体绝缘料及其制备方法 Download PDFInfo
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- B29C2948/00—Indexing scheme relating to extrusion moulding
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Abstract
本发明公开了一种电力电缆用TPU/SEBS热塑性弹性体绝缘料及其制备方法。其中各成分及其重量份为:TPU100-120、SEBS40-50、有机累托石5-8、沉淀白炭黑20-30、氢氧化铝8-12、氧化锌2-3、硬脂酸1-2、DCP5-8、硬脂酸钡1-2、二盐基亚磷酸铅0.5-1、双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.2-0.4、DOP4-6、轻质碳酸钙30-40、抗氧剂1035?1-2、紫外线吸收剂UV-531?1-2。本发明生产出来的绝缘料不仅具有优良的机械物理性能、绝缘性能,而且同时还具有良好的耐高低温性、耐油、耐溶剂、耐磨性、耐臭氧、耐老化等优点,经久耐用,环保无污染,完全能够满足现代电线电缆的要求。
Description
技术领域
本发明涉及一种电缆用绝缘料,具体涉及一种电力电缆用TPU/SEBS热塑性弹性体绝缘料及其制备方法。
背景技术
随着现代行业的不断发展,各种现代电器设施(如通讯设施、电梯、音响电话、机车引接线等)用电线电缆对各方面的要求也越来越高。其中绝缘料性能的优劣直接影响电线电缆的质量、加工效率、应用范围。普通PVC电缆料由于含有大量氯元素,燃烧时会散发出大量浓烟会让人窒息,影响能见度,并产生一些致癌物质和HCl气体,对环境造成严重危害。普通PVC绝缘料还存在着耐酸碱,耐热油,耐有机溶剂性能较差等缺点,在所述特定环境中容易出现破损和开裂。热塑性聚氨脂(TPU)是一种新型的各项性能优异的有机高分子合成材料,具有优异的物理性能,例如耐磨性,回弹力都好过普通PVC,耐老化性好过橡胶橡胶,可以说是替代PVC的最理想的材料。
发明内容
本发明的目的在于针对现有技术的不足,提供一种电力电缆用TPU/SEBS热塑性弹性体绝缘料及其制备方法,达到耐油、耐热、柔软、回弹力好、耐溶剂、耐寒及低烟等综合性能。
本发明采用的技术方案如下:
电力电缆用TPU/SEBS热塑性弹性体绝缘料,其中各成分及其重量份为:
TPU100-120
SEBS40-50
有机累托石5-8
沉淀白炭黑20-30
氢氧化铝8-12
氧化锌2-3
硬脂酸1-2
DCP5-8
硬脂酸钡1-2
二盐基亚磷酸铅0.5-1
双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.2-0.4
DOP4-6
轻质碳酸钙30-40
抗氧剂10351-2
紫外线吸收剂UV-5311-2。
优选地,电力电缆用TPU/SEBS热塑性弹性体绝缘料,其中各成分及其重量份为:
TPU100
SEBS40
有机累托石6
沉淀白炭黑25
氢氧化铝10
氧化锌2
硬脂酸2
DCP6
硬脂酸钡1.5
二盐基亚磷酸铅0.6
双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.25
DOP5
轻质碳酸钙30
抗氧剂10351
紫外线吸收剂UV-5311.5。
所述的有机累托石制备方法如下:取20-40份累托石,向其加入400-650份去离子水,超声分散作用下配制成累托石悬浮液,于80-90℃恒温水浴中,边搅拌边滴加10-20份浓度为20%的十二烷基季铵盐水溶液,搅拌5-6h后,静置8-12h,抽滤,用去离子水洗涤沉淀无Cl-,真空干燥至恒重,研碎并过200-300目筛。
电力电缆用TPU/SEBS热塑性弹性体绝缘料的制备方法,包括以下步骤:
(1)将有机累托石与双(二辛氧基焦磷酸酯基)乙撑钛酸酯加入高速混合机中,在90-110℃下以500-800rpm的速度搅拌混合20-30min,然后将经钛酸酯偶联剂处理过有机累托石投入螺杆双挤出机中,再加入TPU,挤出机熔融段温度控制在120-140℃,在400-600r/min的转速下熔融共混10-20min,然后挤出造粒,即得TPU/有机累托石纳米复合材料;
(2)将SEBS烘干后与上述制得的TPU/有机累托石纳米复合材料加入到混炼机上混炼10-20min,温度为100-110℃,得到混炼胶;
(3)将上述制得的混炼胶与硬脂酸、氧化锌、DOP投入密炼机中,混炼2-3min后加入沉淀白炭黑、轻质碳酸钙、氢氧化铝继续混炼4-5min,最后加入余下各种助剂混炼1-2min,密炼机转速150-200r/min,温度控制在90-105℃;
(4)将密炼后得到的混和料经双锥剪切输送入螺杆挤出机挤出加工,挤出时的机身温度为140±10℃,机头温度为110±10℃,挤出后在平板硫化机上进行硫化,在155-165℃下热压8-10min,常温冷压4-6min,硫化压力6-10MPa,出线速度为12-15m/min。
本发明的有益效果:
本发明通过对累托石有机改性后与TPU熔融共混后制得TPU/有机累托石纳米复合材料,可以明显提高改善绝缘料的刚性和抗变形能力,同时也可以提高绝缘料的耐热空气老化性能以及耐油性能。本发明生产出来的绝缘料不仅具有优良的机械物理性能、绝缘性能,而且同时还具有良好的耐高低温性、耐油、耐溶剂、耐磨性、耐臭氧、耐老化等优点,经久耐用,环保无污染,完全能够满足现代电线电缆的要求。
具体实施方式
电力电缆用TPU/SEBS热塑性弹性体绝缘料,其中各成分及其重量份为:
TPU100份
SEBS40份
有机累托石6份
沉淀白炭黑25份
氢氧化铝10份
氧化锌2份
硬脂酸2份
DCP6份
硬脂酸钡1.5份
二盐基亚磷酸铅0.6份
双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.25份
DOP5份
轻质碳酸钙30份
抗氧剂10351份
紫外线吸收剂UV-5311.5。
其中,所述的有机累托石制备方法如下:取30份累托石,向其加入600份去离子水,超声分散作用下配制成累托石悬浮液,于80℃恒温水浴中,边搅拌边滴加15份浓度为20%的十二烷基季铵盐水溶液,搅拌6h后,静置10h,抽滤,用去离子水洗涤沉淀无Cl-,真空干燥至恒重,研碎并过200目筛。
电力电缆用TPU/SEBS热塑性弹性体绝缘料的制备方法,包括以下步骤:
(1)将有机累托石与双(二辛氧基焦磷酸酯基)乙撑钛酸酯加入高速混合机中,在105℃下以800rpm的速度搅拌混合20min,然后将经钛酸酯偶联剂处理过有机累托石投入螺杆双挤出机中,再加入TPU,挤出机熔融段温度控制在130℃,在600r/min的转速下熔融共混10min,然后挤出造粒,即得TPU/有机累托石纳米复合材料;
(2)将SEBS烘干后与上述制得的TPU/有机累托石纳米复合材料加入到混炼机上混炼15min,温度为105℃,得到混炼胶;
(3)将上述制得的混炼胶与硬脂酸、氧化锌、DOP投入密炼机中,混炼3min后加入沉淀白炭黑、轻质碳酸钙、氢氧化铝继续混炼5min,最后加入余下各种助剂混炼2min,密炼机转速150r/min,温度控制在95℃;
(4)将密炼后得到的混和料经双锥剪切输送入螺杆挤出机挤出加工,挤出时的机身温度为130℃,机头温度为105℃,挤出后在平板硫化机上进行硫化,在160℃下热压10min,常温冷压5min,硫化压力8MPa,出线速度为12m/min。
本发明生产出来的绝缘料的主要性能指标如下:
1、20℃时绝缘电阻不小于150MΩ/km。
2、成品电缆经受交流50HZ3.5KV/5min电压试验不击穿。
3、物理机械性能如下表:
序号 | 性能项目 | 单位 | 技术指标 |
1 | 抗张强度 | N/mm2 | ≥15..0 |
2 | 断裂伸长率 | % | ≥200 |
3 | 135℃×168h老化后抗张强度最大变化率 | % | ±25 |
4 | 135℃×168h老化后断裂伸长率最大变化率 | % | ±25 |
5 | 85℃×336h吸水试验 | mg/cm2 | ≤1 |
6 | 130℃×1h收缩试验 | % | ≤4 |
Claims (2)
1.电力电缆用TPU/SEBS热塑性弹性体绝缘料,其特征在于,其中各成分及其重量份为:TPU100-120SEBS40-50有机累托石5-8沉淀白炭黑20-30氢氧化铝8-12氧化锌2-3硬脂酸1-2DCP5-8硬脂酸钡1-2二盐基亚磷酸铅0.5-1双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.2-0.4DOP4-6轻质碳酸钙30-40抗氧剂10351-2紫外线吸收剂UV-5311-2;所述的有机累托石制备方法如下:取20-40份累托石,向其加入400-650份去离子水,超声分散作用下配制成累托石悬浮液,于80-90℃恒温水浴中,边搅拌边滴加10-20份浓度为20%的十二烷基季铵盐水溶液,搅拌5-6h后,静置8-12h,抽滤,用去离子水洗涤沉淀无Cl-,真空干燥至恒重,研碎并过200-300目筛;
所述的电力电缆用TPU/SEBS热塑性弹性体绝缘料的制备方法,包括以下步骤:
(1)将有机累托石与双(二辛氧基焦磷酸酯基)乙撑钛酸酯加入高速混合机中,在90-110℃下以500-800rpm的速度搅拌混合20-30min,然后将经钛酸酯偶联剂处理过有机累托石投入螺杆双挤出机中,再加入TPU,挤出机熔融段温度控制在120-140℃,在400-600r/min的转速下熔融共混10-20min,然后挤出造粒,即得TPU/有机累托石纳米复合材料;
(2)将SEBS烘干后与上述制得的TPU/有机累托石纳米复合材料加入到混炼机上混炼10-20min,温度为100-110℃,得到混炼胶;
(3)将上述制得的混炼胶与硬脂酸、氧化锌、DOP投入密炼机中,混炼2-3min后加入沉淀白炭黑、轻质碳酸钙、氢氧化铝继续混炼4-5min,最后加入余下各种助剂混炼1-2min,密炼机转速150-200r/min,温度控制在90-105℃;
(4)将密炼后得到的混和料经双锥剪切输送入螺杆挤出机挤出加工,挤出时的机身温度为140±10℃,机头温度为110±10℃,挤出后在平板硫化机上进行硫化,在155-165℃下热压8-10min,常温冷压4-6min,硫化压力6-10MPa,出线速度为12-15m/min。
2.电力电缆用TPU/SEBS热塑性弹性体绝缘料,其特征在于,其中各成分及其重量份为:TPU100SEBS40有机累托石6沉淀白炭黑25氢氧化铝10氧化锌2硬脂酸2DCP6硬脂酸钡1.5二盐基亚磷酸铅0.6双(二辛氧基焦磷酸酯基)乙撑钛酸酯0.25DOP5轻质碳酸钙30抗氧剂10351紫外线吸收剂UV-5311.5。
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