CN106413157A - 一种24伏汽车专用的自限温电伴热带 - Google Patents
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Abstract
本发明公开了一种24伏汽车专用的自限温电伴热带，包括两根平行设置的铜芯母线、通过挤包连接两根所述铜芯母线的发热芯层、以及包裹在所述发热芯层外的绝缘层，所述发热芯层为耐寒抗老化PTC发热材料制成，所述耐寒抗老化PTC发热材料由以下质量百分比的原料制成：茂金属聚乙烯、高密度聚乙烯、乙烯共聚物热塑性弹性体、碳纤维、炭黑、苯并三唑类光稳定剂、受阻酚类抗氧剂、十溴二苯乙烷、邻苯二甲酸乙辛酯、过氧化二异丙苯、成核透明剂zc‑3。本发明有效地避免了寒冷季节汽车油箱凝固采用明火烘烤易发生事故的隐患，结合电伴热带使用的绝缘材料为聚全氟乙炳烯制成，其绝缘性能、耐化学性能优越，产品的安全性能高。
Description
技术领域
本发明涉及一种自限温电伴热带产品技术领域，特别是一种24伏汽车专用的自限温电伴热带。
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。
随着对自限温电伴热带这一新型伴热方式的了解，由于其典型的PTC特性使其具备了自动跟踪补偿功率、节能、不会过热烧毁等显著特点，结合其适合宽幅电压使用，所以针对汽车油箱寒冷季节凝固，车载电源最高电压24伏的特性，因此有必要开发一种24伏汽车专用自限温电伴热带。
发明内容
为了克服现有技术的不足，本发明提供了一种24伏汽车专用的自限温电伴热带，以改善汽车油箱寒冷季节容易发生凝固的问题。
本发明解决其技术问题所采用的技术方案是：
一种24伏汽车专用的自限温电伴热带，包括两根平行设置的铜芯母线、通过挤包连接两根所述铜芯母线的发热芯层、以及包裹在所述发热芯层外的绝缘层，所述发热芯层为耐寒抗老化PTC发热材料制成，所述耐寒抗老化PTC发热材料由以下质量百分比的原料制成：
茂金属聚乙烯 5-9%
高密度聚乙烯 65-70%
乙烯共聚物热塑性弹性体 6-10%
碳纤维 1.5-2.5%
炭黑 15-25%
苯并三唑类光稳定剂 0.25-0.35%
受阻酚类抗氧剂 0.10-0.20%
十溴二苯乙烷 0.10-0.20%
邻苯二甲酸乙辛酯 0.10-0.20%
过氧化二异丙苯 0.10-0.20%
成核透明剂zc-3 0.05-0.15%。
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圆铜导线。
作为上述技术方案的进一步优选，所述绝缘层为聚全氟乙丙烯材料制成。
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24伏汽车专用的自限温电伴热带，有效地避免了寒冷季节汽车油箱凝固采用明火烘烤易发生事故的隐患，结合电伴热带使用的绝缘材料为聚全氟乙炳烯制成，其绝缘性能、耐化学性能优越，产品的安全性能高。
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24伏汽车专用的自限温电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24伏汽车专用的自限温电伴热带，包括两根平行设置的铜芯母线1、通过挤包连接两根所述铜芯母线1的发热芯层2、以及包裹在所述发热芯层2外的绝缘层3，两根所述铜芯母线1均为镀锡圆铜导线，所述绝缘层3为聚全氟乙丙烯材料制成。所述发热芯层2为耐寒抗老化PTC发热材料制成，所述耐寒抗老化PTC发热材料由以下质量百分比的原料制成：
茂金属聚乙烯 5-9%
高密度聚乙烯 65-70%
乙烯共聚物热塑性弹性体 6-10%
碳纤维 1.5-2.5%
炭黑 15-25%
苯并三唑类光稳定剂 0.25-0.35%
受阻酚类抗氧剂 0.10-0.20%
十溴二苯乙烷 0.10-0.20%
邻苯二甲酸乙辛酯 0.10-0.20%
过氧化二异丙苯 0.10-0.20%
成核透明剂zc-3 0.05-0.15%。
与现有的汽车油箱防凝固的解决方式相比，本发明的首创之处在于将自限温电伴热带作为发热体，应用于汽车油箱伴热。经过试验，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85℃。
测PTC发热材料、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PTC发热材料、绝缘层的低温弯曲均-40℃情况下不开裂，高于GB19518.1-2004国家标准中-25℃～-30℃不开裂的要求。
测PTC发热材料、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PTC发热材料、绝缘层的热延伸率均≤30%，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25 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≤±2%，远小于国家标准≤±20%的要求。
测PTC发热材料、绝缘层的人工气候老化试验性能：依据GB12527-2008《额定电压1kV及以下架空绝缘电缆》国家标准，测电伴热带的PTC发热材料、绝缘层的抗拉强度变化率和断裂伸长变化率均≤±13%，远小于国家标准≤±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≤±20%，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。
结合试验数据表明使用24伏自限温电伴热带作为发热体能增加了安全性能，有效的解决了寒冷季节汽车油箱防凝固采用明火烘烤隐患事故的发生，保障了人生及财产的安全。
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 (3)
1.一种24伏汽车专用的自限温电伴热带，其特征在于：包括两根平行设置的铜芯母线（1）、通过挤包连接两根所述铜芯母线（1）的发热芯层（2）、以及包裹在所述发热芯层（2）外的绝缘层（3），所述发热芯层（2）为耐寒抗老化PTC发热材料制成，所述耐寒抗老化PTC发热材料由以下质量百分比的原料制成：
茂金属聚乙烯 5-9%
高密度聚乙烯 65-70%
乙烯共聚物热塑性弹性体 6-10%
碳纤维 1.5-2.5%
炭黑 15-25%
苯并三唑类光稳定剂 0.25-0.35%
受阻酚类抗氧剂 0.10-0.20%
十溴二苯乙烷 0.10-0.20%
邻苯二甲酸乙辛酯 0.10-0.20%
过氧化二异丙苯 0.10-0.20%
成核透明剂zc-3 0.05-0.15%。
2.根据权利要求1所述的一种24伏汽车专用的自限温电伴热带，其特征在于：两根所述铜芯母线（1）均为镀锡圆铜导线。
3.根据权利要求1所述的一种24伏汽车专用的自限温电伴热带，其特征在于：所述绝缘层（3）为聚全氟乙炳烯材料制成。
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