CN106496754A - 光伏电缆用辐照交联无卤低烟护套料 - Google Patents
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Abstract
本发明涉及一种不仅具有耐高温、耐臭氧、耐候和耐紫外线的特性,而且具有阻燃性能好、对环境和人体无危害的光伏电缆用辐照交联无卤低烟护套料,乙烯‑醋酸乙烯酯共聚物20%‑40%、低密度聚乙烯0%‑20%、氢氧化铝30%‑60%、碳酸钙镁0%‑10%、偶联剂与交联剂1%‑10%、相容剂1%‑10%、抗氧剂0.1%‑1%、润滑剂0.1%‑1%和稳定剂0.1%‑1%。优点:一是光伏电缆用辐照交联无卤低烟护套料克服了传统PVC护套料对环境和人体的危害,无毒绿色环保;二是耐高温、耐臭氧、耐候和耐紫外线,阻燃性能好。
Description
技术领域
本发明涉及一种不仅具有耐高温、耐臭氧、耐候和耐紫外线的特性,而且具有阻燃性能好、对环境和人体无危害的光伏电缆用辐照交联无卤低烟护套料,属无卤护套制造领域。
背景技术
目前,太阳能光伏电缆大都采用普通PVC护套,而普通PVC护套料含有卤素等有毒物质,燃烧时会放出氯化氢气体,易污染环境,并且不耐臭氧及水蒸气,寿命短。其次,由于光伏电缆所处的环境非常恶劣,不仅温度高、紫外线照射强、臭氧含量大等,而现有的光伏电缆护套的阻燃性能、耐高温性、耐臭氧性、耐候性和耐紫外线性能不能达到所需要求,因此极容易造成线缆的燃烧,进而导致整个光伏系统的瘫痪。
发明内容
设计目的:避免背景技术中的不足之处,设计一种不含卤素,且具有高阻燃性、耐高温、耐臭氧、耐候和紫外线耐受性强的光伏电缆专用的护套料。
设计方案:为了实现上述设计目的。本发明采用乙烯-醋酸乙烯酯共聚物和低密度聚乙烯粒料、氢氧化铝阻燃剂以及其他助剂按照一定配比混炼设计的目的在于:1、所制得的光伏电缆用辐照交联无卤低烟绝缘层在经过180℃/168h热老化后断裂伸长率保留率仍可达到80%。温度升高,高分子链的运动加剧,一旦超过化学键的离解能,就会引起高分子链的热降解或基团脱落,为了控制降解速率,本发明引入了高效的抗氧剂,能有效地防止聚合物材料在长期老化过程中的热氧化降解,同时也是一种高效的加工稳定剂,能改善聚合物材料在高温加工条件下的耐变色性。通过阿累尼乌斯公式推算,该无卤阻燃绝缘料挤出制成的光伏电缆绝缘层在125℃使用寿命可达25年以上。基料通过与高效抗氧剂共同作用对绝缘材料进行有效防护,提高了材料的耐臭氧、耐候和耐直流电压性能。2、在上述的光伏电缆用辐照交联无卤低烟绝缘料中,该绝缘料中还包括重量份为0.1%-1%的润滑剂,所述的润滑剂为硬脂酸铝和微晶石蜡的混合物,两者配合比例硬脂酸铝:微晶石蜡=1:1两种润滑剂兼具内外润滑作用,少量可以进入高分子化合物的分子链之间,削弱高分子链间的相互作用力,引起滑动和旋转,同时又不过分降低高分子化合物的玻璃化温度,其余则附着在熔体或加工机械、模具的表面,形成润滑界面,降低熔体与加工机械之间的摩擦力。且该微晶石蜡的纯度较高,所以应用到本光伏电缆用辐照交联无卤低烟绝缘料中会使其绝缘性能较好。3、精选了氢氧化铝和碳酸钙镁两种阻燃剂协同阻燃,在燃烧的初期阶段,氢氧化铝吸热并释放气体,燃烧后期,碳酸钙镁通过释放二氧化碳对燃烧火焰起到稀释作用有效降低了传递到聚合物的热量,最后形成有强度的增强型灰烬,使本发明材料具有很高的阻燃效果,材料阻燃等级达到V-0级。4、在上述的光伏电缆用辐照交联无卤低烟绝缘料中,所述的稳定剂由以下成分组成:2,4-二羟基二苯甲酮的衍生物和2-羟基-4-正辛氧基二苯甲酮,两者配合比例2,4-二羟基二苯甲酮的衍生物:2-羟基-4-正辛氧基二苯甲酮=1:1。两种稳定剂协同作用时,能强烈地选择性吸收高能量的紫外线,并进行能量转换,以热能形式或无害的低能辐射将能量释放或消耗,从而极大地减缓了材料的光降解作用。
技术方案:一种光伏电缆用辐照交联无卤低烟护套料,质量百分数:乙烯-醋酸乙烯酯共聚物20%-40%、低密度聚乙烯0%-20%、氢氧化铝30%-60%、碳酸钙镁0%-10%、偶联剂与交联剂1%-10%、相容剂1%-10%、抗氧剂0.1%-1%、润滑剂0.1%-1%和稳定剂0.1%-1%。
所述的乙烯-醋酸乙烯酯共聚物中的醋酸乙烯含量为5%-50%;偶联剂和交联剂为聚醚改性有机硅烷;相容剂为乙烯-醋酸乙烯酯共聚物接枝马来酸酐;抗氧剂为多酚类抗氧剂1010;润滑剂为硬脂酸铝和微晶石蜡的混合物;稳定剂为2,4-二羟基二苯甲酮的衍生物和2-羟基-4-正辛氧基二苯甲酮的复配物;辐照源为高能电子束,辐照剂量为50-200kGy。
本发明与背景技术相比,一是光伏电缆用辐照交联无卤低烟护套料克服了传统PVC护套料对环境和人体的危害,无毒绿色环保;二是耐高温、耐臭氧、耐候和耐紫外线,阻燃性能好。
具体实施方式
实施例1:一种光伏电缆用辐照交联无卤低烟护套料,质量百分数组成:乙烯-醋酸乙烯酯共聚物20%-40%、低密度聚乙烯0%-20%、氢氧化铝30%-60%、碳酸钙镁0%-10%、偶联剂与交联剂1%-10%、相容剂1%-10%、抗氧剂0.1%-1%、润滑剂0.1%-1%和稳定剂0.1%-1%。
所述偶联剂与交联剂为聚醚改性有机硅烷,所述相容剂为乙烯-醋酸乙烯酯共聚物接枝马来酸酐,所述抗氧剂为多酚类抗氧剂1010,所述润滑剂为硬脂酸铝和微晶石蜡的混合物,所述稳定剂为2,4-二羟基二苯甲酮的衍生物和2-羟基-4-正辛氧基二苯甲酮的复配物。
实施例2:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物20%、低密度氢氧化铝60%、碳酸钙镁10%、偶联剂与交联剂10%、相容剂9%、抗氧剂0.1%、润滑剂0.4%%和稳定剂0.5%。
实施例3:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物40%、低密度聚乙烯20%、氢氧化铝30%、偶联剂与交联剂6%、相容剂1%、抗氧剂1%、润滑剂1%和稳定剂1%。
实施例4:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物30%、低密度聚乙烯15%、氢氧化铝38.5%、碳酸钙镁5%、偶联剂与交联剂5%、相容剂5%、抗氧剂0.5%、润滑剂0.5%和稳定剂0.5%。
实施例5:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物40%、低密度聚乙烯20%、氢氧化铝30%、偶联剂与交联剂5%、相容剂4%、抗氧剂0.6%、润滑剂0.6%和稳定剂0.8%。
实施例6:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物40%、氢氧化铝40%、碳酸钙镁8.5%、偶联剂与交联剂5%、相容剂5%、抗氧剂0.5%、润滑剂0.5和稳定剂0.5%。
实施例7:在实施例1的基础上,乙烯-醋酸乙烯酯共聚物35%、低氢氧化铝42%、偶联剂与交联剂10%、相容剂10%、抗氧剂1%、润滑剂1%和稳定剂1%。
实施例8:在实施例1的基础上,取乙烯-醋酸乙烯酯共聚物80g,低密度聚乙烯25g,氢氧化铝阻燃剂125g,碳酸钙镁阻燃剂15g,偶联剂与交联剂聚醚改性有机硅烷0.65g,相容剂乙烯-醋酸乙烯酯共聚物接枝马来酸酐10g,抗氧剂1010为0.5g,润滑剂硬脂酸铝/微晶石蜡=0.5/0.5g,稳定剂2,4-二羟基二苯甲酮的衍生物/2-羟基-4-正辛氧基二苯甲酮=0.5/0.5g,辐照剂量为150kGy,混炼机混炼,混炼时间为10-30分钟,混炼机的加热温度为150-200℃,螺杆转速为50-80rpm;样品压片后再进行高能电子束辐照,辐照剂量为50-200kGy;最终制得本发明所述的光伏电缆用辐照交联无卤低烟护套料,其光伏电缆用辐照交联无卤低烟护套料的拉伸强度=9.0MPa,断裂伸长率=175%。
需要理解到的是:上述实施例虽然对本发明的设计思路作了比较详细的文字描述,但是这些文字描述,只是对本发明设计思路的简单文字描述,而不是对本发明设计思路的限制,任何不超出本发明设计思路的组合、增加或修改,均落入本发明的保护范围内。
Claims (6)
1.一种光伏电缆用辐照交联无卤低烟护套料,其特征是质量百分数:乙烯-醋酸乙烯酯共聚物20%-40%、低密度聚乙烯0%-20%、氢氧化铝30%-60%、碳酸钙镁0%-10%、偶联剂与交联剂1%-10%、相容剂1%-10%、抗氧剂0.1%-1%、润滑剂0.1%-1%和稳定剂0.1%-1%。
2.根据权利要求1所述的光伏电缆用辐照交联无卤低烟护套料,其特征是:所述偶联剂与交联剂为聚醚改性有机硅烷。
3.根据权利要求1所述的光伏电缆用辐照交联无卤低烟护套料,其特征是:所述相容剂为乙烯-醋酸乙烯酯共聚物接枝马来酸酐。
4.根据权利要求1所述的光伏电缆用辐照交联无卤低烟护套料,其特征是:所述抗氧剂为多酚类抗氧剂1010。
5.根据权利要求1所述的光伏电缆用辐照交联无卤低烟护套料,其特征是:所述润滑剂为硬脂酸铝和微晶石蜡的混合物。
6.根据权利要求1所述的光伏电缆用辐照交联无卤低烟护套料,其特征是:所述稳定剂为2,4-二羟基二苯甲酮的衍生物和2-羟基-4-正辛氧基二苯甲酮的复配物。
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Cited By (2)
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CN108059761A (zh) * | 2017-12-11 | 2018-05-22 | 上海至正道化高分子材料股份有限公司 | 一种125℃辐照交联光伏线缆用阻燃护套料及其制备方法 |
CN108976573A (zh) * | 2018-05-18 | 2018-12-11 | 杭州高新橡塑材料股份有限公司 | 光伏电缆用辐照交联无卤低烟护套料 |
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