CN104194167A - 一种无卤阻燃导热电线绝缘层及电线 - Google Patents
一种无卤阻燃导热电线绝缘层及电线 Download PDFInfo
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Abstract
本发明涉及一种无卤阻燃导热电线绝缘层,所述绝缘层通过紫外光辐照电线绝缘料进行交联;所述电线绝缘料按质量份数,包括如下组分:EPDM 40~80份;LDPE 10~30份;EVA 10~30份;PS 20~30份;氮化铝 10~30份;氮化硼 10~30份;层状硅铝酸盐 10~30份;硬脂酸 10~25份;偶联剂 1~3份;碳化硅 4~10份。本发明通过对无卤阻燃电线绝缘料中各组分的选择,获得了导热优良的无卤阻燃电线,其可以用于微电子领域,能够迅速将导体的热量传给散热设备,保障微电子器件的正常运行。
Description
技术领域
本发明涉及无卤阻燃导热电线绝缘层及电线,具体地,本发明涉及一种通过紫外光辐照进行交联的无卤阻燃导热电线绝缘层及电线。
背景技术
随着经济的迅速发展,电线电缆在各个领域中都得到广泛的应用。随之电气火灾事故的频繁发生,电线电缆的阻燃问题逐渐引起世界各国的重视。20世纪70年代,国际上开始对电线电缆的阻燃性能进行研究,并生产出具有阻燃性能的电线电缆。但是,以PVC为基材的含卤阻燃电缆燃烧时释放出大量烟雾和有毒的、腐蚀性的气体是火灾中危险因素,在火灾中妨碍了人们的安全撤离和灭火工作,使生命财产遭到严重损失。20世纪70年代末、80年代初,开始研制性能更好的“清洁”的低烟无卤阻燃聚烯烃电线电缆并已得到应用。
阻燃电线电缆通常可分为一般阻燃电线电缆、低烟低卤阻燃电线电缆和低烟无卤阻燃电线电缆。目前我国阻燃电线电缆产品以含卤阻燃为主,这种电线电缆在燃烧时释放出大量的浓烟和腐蚀性卤化物,造成人员伤亡并腐蚀各种设备,即所谓的“二次灾害”。为达到低烟、低毒及阻燃目的,国内外许多厂家都致力于低烟低卤,低烟无卤阻燃材料的开发。这类材料燃烧时发烟量少,释放出有毒气体少,减少对人体及仪器设备的伤害。国外发达国家对低烟低卤、低烟无卤阻燃电线电缆料的研究比较早,技术较成熟,现在已进入实用阶段。我国对低烟低卤、特别是低烟无卤阻燃电线电缆料的研究开发比较晚,目前我国对低烟无卤阻燃电线电缆料的研究还处于初期,有的厂家已生产出低烟无卤阻燃电线电缆料,但大部分存在导热性能较差的问题,无法满足微电子集成技术和组装技术的要求。
工业生产和科学技术发展对导热材料提出了更高要求,除导热性外,希望材料具有优良的综合性能,如质轻、易加工成型、抗冲击、耐化学腐蚀、热疲劳性能优异、优良电绝缘性能及化学稳定性等。传统导热材料如金属和金属氧化物及其它非金属材料已无法满足一些特殊场合的绝缘导热使用要求,如电磁屏蔽、电子信息、热工测量技术领域广泛使用的功率管、集成块、热管、集成电路、覆铜板的绝缘导热,也无法作为武器装备、航空航天电子设备、电机、通讯、电器设备、仪器所需的导热绝缘材料使用。
因此,本领域亟需一种导热性较好的无卤阻燃电线绝缘层及电线。
发明内容
本发明的目的之一在于提供一种无卤阻燃导热电线绝缘层,所述绝缘层通过紫外光辐照电线绝缘料进行交联;
所述电线绝缘料按质量份数,包括如下组分:
EPDM 40~80份
LDPE 10~30份
EVA 10~30份
PS 20~30份
氮化铝 10~30份
氮化硼 10~30份
层状硅铝酸盐 10~30份
硬脂酸 10~25份
偶联剂 1~3份
碳化硅 4~10份。
优选地,所述电线绝缘料按重量份数还包括如下组分:
抗老化剂 3~6份
抗氧剂 1~3份。
优选地,所述EPDM的第三单体为亚乙基降冰片烯。
优选地,所述LDPE熔体指数为2g/10min,密度为0.918g/cm3的LDPE。
优选地,所述EVA中VA的含量为15~20%,优选17%。
优选地,所述氮化铝、氮化硼的粒径选自1~2μm之间,优选1.4~1.6μm之间。
优选地,所述层状硅铝酸盐的粒径为50~150nm,优选80~110nm。
优选地,所述抗氧剂为受阻酚类抗氧剂和硫醚类抗氧剂按质量比1:3~4配比而得;
优选地,所述的受阻酚类抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯;所述的硫醚类抗氧剂为硫代二丙酸双十八醇酯。
优选地,所述抗老化剂选自防老剂NAPM2和/或防老剂RD3。
本发明的目的之二是提供一种电线,所述电线的绝缘层为目的之一所述的绝缘层,所述电线通过如下方法制备得到:
(1)将配方量的EPDM、LDPE、EVA、PS密炼均匀;
(2)接着加入配方量的氮化铝、氮化硼、层状硅铝酸盐、硬脂酸、碳化硅、偶联剂、抗老化剂和抗氧剂密炼均匀,出料,得到混合料;
(3)将混合料于120~160℃挤出、水冷、抽风干燥、切粒,得到粒料;
(4)将粒料与金属芯线在线缆挤出机上成型,并风冷、收卷,得到电线;
(5)将电线进行紫外光辐照,制成无卤阻燃电线;
优选地,步骤(1)中所述的密炼的条件为120~140℃密炼3~5min;
步骤(2)中所述的密炼的条件为130~150℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为8~14Mrad。
与现有技术相比,本发明具有如下有益效果:
本发明通过对无卤阻燃导热电线绝缘料中各组分的选择,获得了导热优良的无卤阻燃电线,其可以用于微电子领域,能够迅速将导体的热量传给散热设备,保障微电子器件的正常运行。
具体实施方式
为更好地说明本发明,便于理解本发明的技术方案,本发明的典型但非限制性的实施例如下:
所述无卤阻燃电线通过如下方法制备得到:
(1)将配方量的EPDM、LDPE、EVA、PS密炼均匀;
(2)接着加入配方量的氮化铝、氮化硼、层状硅铝酸盐、硬脂酸、碳化硅、偶联剂、抗老化剂和抗氧剂密炼均匀,出料,得到混合料;
(3)将混合料于120~160℃挤出、水冷、抽风干燥、切粒,得到粒料;
(4)将粒料与金属芯线在线缆挤出机上成型,并风冷、收卷,得到电线;
(5)将电线进行紫外光辐照,制成无卤阻燃电线。
实施例1
一种无卤阻燃电线绝缘层绝缘料按质量分数包括如下组分:
所述电线绝缘料按质量份数,包括如下组分:
EPDM 43份
LDPE 11份
EVA 28份
PS 25份
氮化铝 20份
氮化硼 20份
层状硅铝酸盐 20份
硬脂酸 15份
偶联剂 2份
碳化硅 7份;
其制备方法中,步骤(1)中所述的密炼的条件为130℃密炼3~5min;
步骤(2)中所述的密炼的条件为140℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为12Mrad。
实施例2
一种无卤阻燃电线绝缘层绝缘料按质量分数包括如下组分:
所述电线绝缘料按质量份数,包括如下组分:
EPDM 80份
LDPE 30份
EVA 10份
PS 30份
氮化铝 10份
氮化硼 30份
层状硅铝酸盐 10份
硬脂酸 25份
偶联剂 1份
碳化硅 10份;
其制备方法中,步骤(1)中所述的密炼的条件为140℃密炼3~5min;
步骤(2)中所述的密炼的条件为130℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为14Mrad。
实施例3
一种无卤阻燃电线绝缘层绝缘料按质量分数包括如下组分:
所述电线绝缘料按质量份数,包括如下组分:
EPDM 50份
LDPE 20份
EVA 20份
PS 25份
氮化铝 30份
氮化硼 10份
层状硅铝酸盐 30份
硬脂酸 10份
偶联剂 3份
碳化硅 4份
抗老化剂 6份
抗氧剂 1份;
其制备方法中,步骤(1)中所述的密炼的条件为120℃密炼3~5min;
步骤(2)中所述的密炼的条件为150℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为8Mrad。
实施例4
一种无卤阻燃电线绝缘层绝缘料按质量分数包括如下组分:
所述电线绝缘料按质量份数,包括如下组分:
EPDM 70份
LDPE 16份
EVA 16份
PS 23份
氮化铝 27份
氮化硼 14份
层状硅铝酸盐 19份
硬脂酸 15份
偶联剂1.7份
碳化硅 8份
抗老化剂 3份
抗氧剂 3份;
其制备方法中,步骤(1)中所述的密炼的条件为128℃密炼3~5min;
步骤(2)中所述的密炼的条件为145℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为11Mrad。
应该注意到并理解,在不脱离后附的权利要求所要求的本发明的精神和范围的情况下,能够对上述详细描述的本发明做出各种修改和改进。因此,要求保护的技术方案的范围不受所给出的任何特定示范教导的限制。
申请人声明,本发明通过上述实施例来说明本发明的详细方法,但本发明并不局限于上述详细方法,即不意味着本发明必须依赖上述详细方法才能实施。所属技术领域的技术人员应该明了,对本发明的任何改进,对本发明产品各原料的等效替换及辅助成分的添加、具体方式的选择等,均落在本发明的保护范围和公开范围之内。
Claims (10)
1.一种无卤阻燃导热电线绝缘层,其特征在于,所述绝缘层通过紫外光辐照电线绝缘料进行交联;
所述电线绝缘料按质量份数,包括如下组分:
EPDM 40~80份
LDPE 10~30份
EVA 10~30份
PS 20~30份
氮化铝 10~30份
氮化硼 10~30份
层状硅铝酸盐 10~30份
硬脂酸 10~25份
偶联剂 1~3份
碳化硅 4~10份。
2.如权利要求1所述的绝缘层,其特征在于,所述电线绝缘料按重量份数还包括如下组分:
抗老化剂 3~6份
抗氧剂 1~3份。
3.如权利要求1或2所述的绝缘层,其特征在于,所述EPDM的第三单体为亚乙基降冰片烯。
4.如权利要求1~3之一所述的绝缘层,其特征在于,所述LDPE熔体指数为2g/10min,密度为0.918g/cm3。
5.如权利要求1~4之一所述的绝缘层,其特征在于,所述EVA中VA的含量为15~20%,优选17%。
6.如权利要求1~5之一所述的绝缘层,其特征在于,所述氮化铝、氮化硼的粒径选自1~2μm之间,优选1.4~1.6μm之间。
7.如权利要求1~6之一所述的绝缘层,其特征在于,所述层状硅铝酸盐的粒径为50~150nm,优选80~110nm。
8.如权利要求1~7之一所述的绝缘层,其特征在于,所述抗氧剂为受阻酚类抗氧剂和硫醚类抗氧剂按质量比1:3~4配比而得;
优选地,所述的受阻酚类抗氧剂为四[β-(3,5-二叔丁基-4-羟基苯基)丙酸]季戊四醇酯;所述的硫醚类抗氧剂为硫代二丙酸双十八醇酯。
9.如权利要求1~8之一所述的绝缘层,其特征在于,所述抗老化剂选自防老剂NAPM2和/或防老剂RD3。
10.一种电线,其绝缘层为权利要求1~9之一所述的绝缘层,其特征在于,所述电线通过如下方法制备得到:
(1)将配方量的EPDM、LDPE、EVA、PS密炼均匀;
(2)接着加入配方量的氮化铝、氮化硼、层状硅铝酸盐、硬脂酸、碳化硅、偶联剂、抗老化剂和抗氧剂密炼均匀,出料,得到混合料;
(3)将混合料于120~160℃挤出、水冷、抽风干燥、切粒,得到粒料;
(4)将粒料与金属芯线在线缆挤出机上成型,并风冷、收卷,得到电线;
(5)将电线进行紫外光辐照,制成无卤阻燃电线;
优选地,步骤(1)中所述的密炼的条件为120~140℃密炼3~5min;
步骤(2)中所述的密炼的条件为130~150℃密炼3~5min。
步骤(5)中所述的紫外光辐照的剂量为8~14Mrad。
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