CN103103993A - 一种导电土工膜及其制备方法 - Google Patents

一种导电土工膜及其制备方法 Download PDF

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CN103103993A
CN103103993A CN2013100326514A CN201310032651A CN103103993A CN 103103993 A CN103103993 A CN 103103993A CN 2013100326514 A CN2013100326514 A CN 2013100326514A CN 201310032651 A CN201310032651 A CN 201310032651A CN 103103993 A CN103103993 A CN 103103993A
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CN103103993B (zh
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徐鼎
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Qingdao Beimei Oil And Gas Field Environmental Protection Technology Co ltd
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Abstract

本发明公开了一种导电土工膜,其特征是由依次排布的至少一层防渗层和一层导电层组成,防渗层和导电层结合在一起,导电层位于最下层,导电层的厚度为0.01~0.05mm,上述导电层的电阻值为103~105欧姆,上述防渗层为绝缘层,绝缘层的外绝缘面电阻值>108欧姆。本发明中的导电土工膜,最下层具有良好的导电性能,而上层则具有良好的绝缘性能,同时其物理性能在具有可导电性能外都没有受到影响,保持了高密度聚乙烯土工膜的物化性能;能够结合电渗漏检测更方便快捷的检出已完成铺设的土工膜的破洞及缺陷,以便能及时地进行焊补,保障整个防渗、防水工程的质量。

Description

一种导电土工膜及其制备方法
技术领域
本发明涉及一种导电土工膜,以及一种导电土工膜的制备方法。
背景技术
土工膜的应用较为广泛,诸如垃圾填埋场、隧道、水渠、水库、污水处理池、污水池等防渗防水工程。上述土工膜,由于在结构方面存在局限性,目前在土工膜铺设完成后进行大面积检测以供选择的检测方法很有限,只能在光纤植入土工膜检测方法、真空检测方法和普通电火花检测方法中进行选择。上述所例举的检测方法检测效率低下,准确性不高。如其中的真空检测方法以及电火花检测方法,只能用于检测焊缝,而不能用于土工膜施工完成后对整个施工现场进行大面积检测;在进行大面积检测过程中需要耗费大量的人力和物力,同时还存在着由于接地体不良而导致检测不出破洞和渗漏点的现象,进而给整个防渗、防水工程的防渗、防水效果带来负面影响,特别是垃圾填埋场或堤坝如果存在这种漏检现象将会带来很严重的后果,如垃圾填埋场因此出现渗漏,污水会污染整个地下土壤及地下水,如堤坝因此出现渗漏,有可能造成溃坝。
由上述可见,有必要对现有的土工膜进行改进。
发明内容
本发明的目的在于提供一种导电土工膜,以及导电土工膜的制备方法。该导电土工膜能够结合电渗漏检测更方便快捷地检出已完成铺设的土工膜的破洞及缺陷,以便能及时地进行焊补,保障整个防渗、防水工程的质量。
其技术解决方案是:
一种导电土工膜,由依次排布的至少一层防渗层和一层导电层组成,防渗层和导电层结合在一起,导电层位于最下层,导电层的厚度为0.01~0.05mm,上述导电层的电阻值为103~105欧姆,上述防渗层为绝缘层,绝缘层的外绝缘面电阻值>108欧姆。
上述防渗层由第一防渗层与第二防渗层组成;其中,第一防渗层的厚度为0.1~0.5mm,第二防渗层的厚度为0.4~2.0mm。
上述第一防渗层的厚度为0.5mm,第二防渗层的厚度为0.5mm,导电层的厚度为0.02mm。
一种上述导电土工膜的制备方法,其防渗层和导电层采取共挤加工工艺的方式结合在一起;上述的导电层是采用以下重量配比的原料制成的:97.5%的高密度聚乙烯、2.5%的导电色母;其中的导电色母是由重量配比为6%的导电炭黑和94%的色母制成的。
本发明具有以下有益技术效果:
本发明中的导电土工膜,由于其最下层(下表层)是具有导电功能的导电层,而其它防渗层则是普通的HDPE层,不具有导电功能,在铺设导电土工膜工程时,土工膜的导电层朝下,这样在大面积电火花检测的过程中,下表层带有高电压,由于上面两层是普通的HDPE层,是绝缘材料,这样足以保护电火花检测者不会受到电伤害;且由于导电层位于最下层,不存在接地不良的问题;再者由于电火花检测的电压是很高的,可达到35KV,由于在检测的过程中不需要注水,因此能够保障电火花检测人员的人身安全,防止发生触电事故;此外,还能够节省检测费用和时间,这就为快速高效检测提供了有力的支持。
本发明中的导电土工膜,最下层具有良好的导电性能,而上层则具有良好的绝缘性能,同时其物理性能在具有可导电性能外都没有受到影响,保持了高密度聚乙烯土工膜的物化性能。
附图说明
下面结合附图与具体实施方式对本发明作更进一步的说明:
图1为本发明中导电土工膜一种实施方式的结构原理示意图,为其剖面结构。
具体实施方式
结合图1,一种导电土工膜,由依次排布的第一防渗层1、第二防渗层2和导电层3组成,第一防渗层、第二防渗层和导电层结合在一起;在使用状态下,第一防渗层、第二防渗层和导电层分别作为该土工膜的最上层(上表层)、中间层和最下层(下表层)。上述第一防渗层的厚度为0.1~0.5mm,第二防渗层的厚度为0.4~2.0mm,导电层的厚度为0.01~0.05mm。上述第一防渗层和第二防渗层均是采用高密度聚乙烯制成的,导电层是采用含有导电炭黑的高密度聚乙烯制成的。上述导电层的电阻值为103~105欧姆,上述防渗层为绝缘层,绝缘层的外绝缘面电阻值>108欧姆。
优选地,上述第一防渗层的厚度可为0.5mm,第二防渗层的厚度为0.5mm,导电层的厚度为0.02mm。
一种上述导电土工膜的制备方法:
上述第一防渗层、第二防渗层和导电层是采取共挤加工工艺的方式结合在一起的。具体生产过程为第一防渗层和第二防渗层均采用普通HDPE(高密度聚乙烯)原料和普通色母经过混料及加热后各由一台挤出机挤出,而导电层则采用含有导电炭黑色母的HDPE(高密度聚乙烯)原料在经过混料及加热则由另一台挤出机共挤出;第一防渗层、第二防渗层与导电层共挤后结合在一起。
上述的导电层是由高密度聚乙烯和导电色母制成的,其中高密度聚乙烯的重量配比为97.5%,导电色母的重量配比为2.5%。上述的导电色母是由导电炭黑和普通色母制成的,其中导电炭黑的重量配比为6%,普通色母的重量配比为94%。上述导电炭黑选用高导电性纯炭黑。
上述各方式中未述及的技术内容采取或借鉴已有技术即可实现。
需要说明的是,在本说明书的教导下本领域技术人员还可以作出这样或那样的容易变化方式,诸如等同方式,或明显变形方式。上述的变化方式均应在本发明的保护范围之内。

Claims (4)

1.一种导电土工膜,其特征在于由依次排布的至少一层防渗层和一层导电层组成,防渗层和导电层结合在一起,导电层位于最下层,导电层的厚度为0.01~0.05mm,上述导电层的电阻值为103~105欧姆,上述防渗层为绝缘层,绝缘层的外绝缘面电阻值>108欧姆。
2.根据权利要求1所述的一种导电土工膜,其特征在于:上述防渗层由第一防渗层与第二防渗层组成;其中,第一防渗层的厚度为0.1~0.5mm,第二防渗层的厚度为0.4~2.0mm。
3.根据权利要求2所述的一种导电土工膜,其特征在于:上述第一防渗层的厚度为0.5mm,第二防渗层的厚度为0.5mm,导电层的厚度为0.02mm。
4.一种如权利要求1所述导电土工膜的制备方法,其防渗层和导电层采取共挤加工工艺的方式结合在一起;其特征在于:上述的导电层是采用以下重量配比的原料制成的:97.5%的高密度聚乙烯、2.5%的导电色母;其中的导电色母是由重量配比为6%的导电炭黑和94%的色母制成的。
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CN104846711A (zh) * 2015-05-11 2015-08-19 河海大学 用于土质边坡加固的电渗方法
CN107791642A (zh) * 2017-09-21 2018-03-13 北京东方雨虹防水技术股份有限公司 导电土工膜及制备方法
CN108384136A (zh) * 2018-01-26 2018-08-10 新疆磐基实业有限公司 石墨烯土工膜及其制备方法和应用
CN109337163A (zh) * 2018-09-21 2019-02-15 山东天海新材料工程有限公司 一种具有热惰性的导电土工膜及其制备方法
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CN110397090A (zh) * 2019-08-23 2019-11-01 武汉市园林建筑工程公司 一种防渗薄膜以及防渗预警系统
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CN104110044A (zh) * 2014-06-27 2014-10-22 中国环境科学研究院 防渗层铺设方法
CN104110044B (zh) * 2014-06-27 2017-09-01 中国环境科学研究院 防渗层结构铺设方法
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CN104846711A (zh) * 2015-05-11 2015-08-19 河海大学 用于土质边坡加固的电渗方法
CN109856192A (zh) * 2017-08-18 2019-06-07 上海甚致环保科技有限公司 用于土工膜的监测传感系统
CN109856192B (zh) * 2017-08-18 2022-03-25 上海甚致环保科技有限公司 用于土工膜的监测传感系统
CN107791642A (zh) * 2017-09-21 2018-03-13 北京东方雨虹防水技术股份有限公司 导电土工膜及制备方法
CN108384136A (zh) * 2018-01-26 2018-08-10 新疆磐基实业有限公司 石墨烯土工膜及其制备方法和应用
CN109337163B (zh) * 2018-09-21 2021-04-02 山东天海新材料工程有限公司 一种具有热惰性的导电土工膜及其制备方法
CN109337163A (zh) * 2018-09-21 2019-02-15 山东天海新材料工程有限公司 一种具有热惰性的导电土工膜及其制备方法
CN110397090A (zh) * 2019-08-23 2019-11-01 武汉市园林建筑工程公司 一种防渗薄膜以及防渗预警系统
CN110397090B (zh) * 2019-08-23 2022-12-20 武汉市园林建筑工程公司 一种防渗薄膜以及防渗预警系统
CN114801405A (zh) * 2022-05-16 2022-07-29 西北工业大学 一种多层数字化土工膜及制备方法
CN114801405B (zh) * 2022-05-16 2023-07-25 西北工业大学 一种多层数字化土工膜及制备方法

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