CN106455167B - 一种低温阻燃地热采暖用自限温伴热带 - Google Patents
一种低温阻燃地热采暖用自限温伴热带 Download PDFInfo
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Abstract
本发明公开了一种低温阻燃地热采暖用自限温伴热带,包括两根平行设置的铜芯母线、包覆连接两根所述铜芯母线的发热芯层、包裹在所述发热芯层外的绝缘层、包裹在所述绝缘层外的屏蔽层以及包裹在所述屏蔽层外的护套层;所述发热芯层为挤塑成型的PTC高分子材料,所述PTC高分子材料由以下组分构成:乙烯三氟氯乙烯共聚物(ECTFE)、氟乙烯丙烯共聚物(FEP)、炭黑(CB)、氧化锌、碳酸钙、邻苯二甲酸二异癸酯(DIDP)、过氧化二碳酸二异龙脑酯(IBCP)、4‑肉桂苯酚(CP)、受阻酚类抗氧剂。本发明所提供的一种低温阻燃地热采暖用自限温伴热带,最高表面温度为70℃,且具有较好的稳定限温效果。
Description
技术领域
本发明涉及一种电伴热带产品技术领域,特别是一种低温阻燃地热采暖用自限温伴热带。
背景技术
电伴热带是一种新型高科技产品,其上个世纪70年代进入应用领域以来,自限式电伴热带已经成为当今世界上最通用的电伴热带类型。它们可以广泛地应用于液态物体在管道中输送和罐体的防冻保温、维持工艺温度、加热公路、坡道、人行横道、屋檐及地板等。基本型自限式电伴热带内部,两根导电芯之间分布着起加热作用的PTC高分子材料,其外部由高分子绝缘层构成。当电源接通时,内部PTC高分子材料受热膨胀,电阻变大,减小发热功率,使温度降低;当温度降低时,内部PTC高分子材料遇冷收缩,电阻变小,增大发热功率,使温度上升,从而达到自动调节温度的作用。
在电伴热带工作时,伴热某一体系,若单位时间内电伴热带向体系传递的热量等于体系向外环境传递的热量,则体系的温度保持不变。能使体系达到的最高温度,称为最高维持温度。
中国专利文献CN 101885872 B公开了一种专用于95摄氏度自限温电伴热带的PTC高分子发热材料,其具有高稳定的发热温度,然而对于家用环境而言,95℃的加热温度偏高,会给使用者造成不适感,因此有必要开发一种温度较低的、使用舒适的低温阻燃地热采暖用自限温伴热带。
发明内容
为了克服现有技术的不足,本发明提供了一种低温阻燃地热采暖用自限温伴热带,具有稳定的发热温度,使用舒适,满足实际使用要求。
本发明解决其技术问题所采用的技术方案是:
一种低温阻燃地热采暖用自限温伴热带,包括两根平行设置的铜芯母线、包覆连接两根所述铜芯母线的发热芯层、包裹在所述发热芯层外的绝缘层、包裹在所述绝缘层外的屏蔽层以及包裹在所述屏蔽层外的护套层;所述发热芯层为挤塑成型的PTC高分子材料,所述PTC高分子材料由以下质量份数的组分构成:
乙烯三氟氯乙烯共聚物(ECTFE) 80份
氟乙烯丙烯共聚物(FEP) 20份
炭黑(CB) 14份
氧化锌 1.1~1.2份
碳酸钙 1.3~1.4份
邻苯二甲酸二异癸酯(DIDP) 0.7~0.8份
过氧化二碳酸二异龙脑酯(IBCP) 0.3~0.4份
4-肉桂苯酚(CP) 0.1份
受阻酚类抗氧剂 0.15份。
作为上述技术方案的进一步优选,两根所述铜芯母线均为镀锡铜绞线或镀镍铜绞线。
作为上述技术方案的进一步优选,所述绝缘层为低烟无卤阻燃热塑性聚烯烃,所述低烟无卤阻燃热塑性聚烯烃由第一组分和第二组分按照3︰7的质量比混合挤出而成,所述第一组分是乙烯和辛烯在茂金属催化剂的催化下通过原位聚合而获得的热塑性弹性体,所述第二组分为乙烯-醋酸乙烯共聚物。
作为上述技术方案的进一步优选,所述屏蔽层为半导电带绕包、半导电料挤包和金属纤维混合编织中的一种或多种复合。
作为上述技术方案的进一步优选,所述护套层为乙丙橡胶材料制成。
与现有技术相比较,本发明的有益效果是:
本发明所提供的一种低温阻燃地热采暖用自限温伴热带,表面发热温度为70℃,适合于家用环境中的地热采暖,使用舒适,能够满足实际使用要求;且绝缘层采用特定配方组成的低烟无卤阻燃热塑性聚烯烃材料制成,具有较好的导热阻燃效果。
附图说明
下面结合附图和实施例对本发明进一步说明。
图1是本发明所述的一种低温阻燃地热采暖用自限温伴热带的结构示意图。
具体实施方式
参照图1,图1是本发明一个具体实施例的结构示意图。
如图1所示,一种低温阻燃地热采暖用自限温伴热带,包括两根平行设置的铜芯母线1、包覆连接两根所述铜芯母线1的发热芯层2、包裹在所述发热芯层2外的绝缘层3、包裹在所述绝缘层3外的屏蔽层4以及包裹在所述屏蔽层4外的护套层5;所述发热芯层2为挤塑成型的PTC高分子材料,两根所述铜芯母线1均为镀锡铜绞线或镀镍铜绞线,所述绝缘层3为低烟无卤阻燃热塑性聚烯烃,所述低烟无卤阻燃热塑性聚烯烃由第一组分和第二组分按照3︰7的质量比混合挤出而成,所述第一组分是乙烯和辛烯在茂金属催化剂的催化下通过原位聚合而获得的热塑性弹性体,所述第二组分为乙烯-醋酸乙烯共聚物;所述屏蔽层4为半导电带绕包加半导电料挤包再外加金属纤维混合编织复合而成,所述护套层5为乙丙橡胶材料制成。
所述PTC高分子材料由以下质量份数的组分构成:
乙烯三氟氯乙烯共聚物(ECTFE) 80份
氟乙烯丙烯共聚物(FEP) 20份
炭黑(CB) 14份
氧化锌 1.1~1.2份
碳酸钙 1.3~1.4份
邻苯二甲酸二异癸酯(DIDP) 0.7~0.8份
过氧化二碳酸二异龙脑酯(IBCP) 0.3~0.4份
4-肉桂苯酚(CP) 0.1份
受阻酚类抗氧剂 0.15份。
本实施例所提供的一种低温阻燃地热采暖用自限温伴热带性能测试结果如下:
发热温度:依据GB/T19835-2005《自限温伴热带》国家标准,测电伴热带其中最高维持温度为72℃。
测发热芯层、绝缘层的低温弯曲性能:依据GB/T2951.14-2008《电缆和光缆绝缘和护套材料通用试验方法第14部分:通用试验方法——低温试验》国家标准,测电伴热带的发热芯层、绝缘层的低温弯曲均-30℃情况下不开裂,符合GB19518.1-2004国家标准中-25℃~-30℃不开裂的要求。
测发热芯层、绝缘层的热延伸性能:依据GB/T2951.21-2008《电缆和光缆绝缘和护套材料通用试验方法第21部分:弹性体混合料专用试验方法——耐臭氧试验——热延伸试验——浸矿物油试验》国家标准,测电伴热带的发热芯层、绝缘层的热延伸率均≤90%,符合国家标准≤150%要求。
测绝缘层的抗拉强度:依据GB/T2951《电缆和光缆绝缘和护套材料通用试验方法》,测电伴热带的绝缘层的抗拉强度均达到22 MPa,远高于12.5 Mpa国家标准要求。
测绝缘层的热老化性能:GB/T2951《电缆和光缆绝缘和护套材料通用试验方法》,测电伴热带的绝缘层的抗拉强度变化率≤±10%,远小于国家标准≤±20%的要求。
测发热芯层、绝缘层的人工气候老化试验性能:依据GB12527-2008《额定电压1 kV及以下架空绝缘电缆》国家标准,测电伴热带的发热芯层、绝缘层的抗拉强度变化率和断裂伸长变化率均≤±23%,小于国家标准≤±15%的要求。
测绝缘层的耐矿物油性能:依据GB/T2951.21-2008《电缆和光缆绝缘和护套材料通用试验方法第21部分:弹性体混合料专用试验方法——耐臭氧试验——热延伸试验——浸矿物油试验》国家标准,测绝缘层浸矿物油后的抗拉强度变化率和断裂伸长变化率均≤±28%,远小于GB/T12706.1-2008≤±40%的要求。
测绝缘层热稳定性性能:依据GB/T19518.1-2004国家标准,测电伴热带140℃条件下存放4周后,承受1500 V/1min无击穿。
测绝缘层的防水试验性能:依据GB/T19835-2005《自限温伴热带》国家标准,测电伴热带浸水48 h后承受3.5 KV/1min无击穿。
以上对本发明的较佳实施进行了具体说明,当然,本发明还可以采用与上述实施方式不同的形式,熟悉本领域的技术人员在不违背本发明精神的前提下所作的等同的变换或相应的改动,都应该属于本发明的保护范围内。
Claims (5)
1. 一种低温阻燃地热采暖用自限温伴热带,其特征在于:包括两根平行设置的铜芯母线(1)、包覆连接两根所述铜芯母线(1)的发热芯层(2)、包裹在所述发热芯层(2)外的绝缘层(3)、包裹在所述绝缘层(3)外的屏蔽层(4)以及包裹在所述屏蔽层(4)外的护套层(5);所述发热芯层(2)为挤塑成型的PTC高分子材料,所述PTC高分子材料由以下质量份数的组分构成:
乙烯三氟氯乙烯共聚物 80份
氟乙烯丙烯共聚物 20份
炭黑 14份
氧化锌 1.1~1.2份
碳酸钙 1.3~1.4份
邻苯二甲酸二异癸酯 0.7~0.8份
过氧化二碳酸二异龙脑酯 0.3~0.4份
4-肉桂苯酚 0.1份
受阻酚类抗氧剂 0.15份。
2.根据权利要求1所述的一种低温阻燃地热采暖用自限温伴热带,其特征在于:两根所述铜芯母线(1)均为镀锡铜绞线或镀镍铜绞线。
3.根据权利要求1所述的一种低温阻燃地热采暖用自限温伴热带,其特征在于:所述绝缘层(3)为低烟无卤阻燃热塑性聚烯烃,所述低烟无卤阻燃热塑性聚烯烃由第一组分和第二组分按照3︰7的质量比混合挤出而成,所述第一组分是乙烯和辛烯在茂金属催化剂的催化下通过原位聚合而获得的热塑性弹性体,所述第二组分为乙烯-醋酸乙烯共聚物。
4.根据权利要求1所述的一种低温阻燃地热采暖用自限温伴热带,其特征在于:所述屏蔽层(4)为半导电带绕包、半导电料挤包和金属纤维混合编织中的一种或多种复合。
5.根据权利要求1所述的一种低温阻燃地热采暖用自限温伴热带,其特征在于:所述护套层(5)为乙丙橡胶材料制成。
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