CN114316416B - 低烟无卤阻燃低压电缆 - Google Patents
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Abstract
本发明公开了一种低烟无卤阻燃低压电缆,包括若干导体和光单元,包带中嵌有一根撕裂绳,所述包带外侧设有外护套,所述导体外侧设有绝缘护套,所述光单元外侧设有光单元护套,所述光单元护套包括以下重量份的材料:乙烯‑醋酸乙烯酯共聚物,线性低密度聚乙烯,三元乙丙橡胶,乙烯基三乙氧基硅烷,硫代二丙酸双十二烷酯,硅酮母粒,氧化铅粉末,乙氧基化三羟甲基丙烷三丙烯酸酯,N,N,N',N'‑四[4‑(二丁氨基)苯基]‑1,4‑苯二胺六氟锑酸盐,二丁基二硫代氨基甲酸锌,三乙基己基磷酸。本发明低烟无卤阻燃低压电缆中光单元护套护套具有隔热性能,可以保护内部的光单元不受外界温度影响。
Description
技术领域
本发明涉及一种复合电缆,尤其涉及一种低烟无卤阻燃低压电缆。
背景技术
防火电缆是电缆产品中的重要组成部分,现阶段应用较广的防火线缆主要有UL系列阻燃电缆和阻燃低烟无卤电缆两大类,应用防火电缆在火灾产生时能够保持电缆的使用和发生火灾时产生较少的有毒气体。现有防火电缆中导体正常运行时最高温度不超过90摄氏度,但在短路时,导体短时(最长持续5s)温度可达到250度。位于导体一侧的光单元在高温条件下必然受损,影响信号传输。因此,如何提供一种在高温条件下,短时间内隔绝热量的光单元护套成为本领域技术人员努力的方向。
发明内容
本发明目的在于提供一种低烟无卤阻燃低压电缆,该低烟无卤阻燃低压电缆中的光单元护套能够隔绝外界高温,保护光单元内部的通讯材料,避免光单元的损坏,有效保证了信号的传输稳定性。
为达到上述目的,本发明采用的技术方案是:一种低烟无卤阻燃低压电缆,包括若干导体和光单元,所述导体和光单元绞合在一起,所述导体和光单元外侧设有包带,所述包带中嵌有一根撕裂绳,所述包带外侧设有外护套,所述导体外侧设有绝缘护套,所述光单元外侧设有光单元护套,所述光单元护套包括以下重量份的材料;
所述光单元护套包括以下重量份的材料:乙烯-醋酸乙烯酯共聚物60份、线性低密度聚乙烯10份、三元乙丙橡胶20份、乙烯基三乙氧基硅烷1份、硫代二丙酸双十二烷酯1.2份、硅酮母粒0.7份、氧化铅粉末3份、乙氧基化三羟甲基丙烷三丙烯酸酯4份、N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐1.5份、二丁基二硫代氨基甲酸锌0.7份、三乙基己基磷酸1份、分散剂0.6份。
上述技术方案中进一步改进的技术方案如下:
1. 上述方案中,所述乙烯-醋酸乙烯酯共聚物的醋酸乙烯占乙烯-醋酸乙烯酯共聚物总重量的40%。
2. 上述方案中,所述三元乙丙橡胶是乙烯、丙烯和非共轭二烯烃的三元共聚物,其中乙烯、丙烯比为80:20。
由于上述技术方案的运用,本发明与现有技术相比具有下列优点:
1. 本发明低烟无卤阻燃低压电缆,在乙烯-醋酸乙烯酯共聚物、线性低密度聚乙烯、三元乙丙橡胶、乙烯基三乙氧基硅烷、硫代二丙酸双十二烷酯、硅酮母粒和氧化铅粉末中进一步添加了N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐,使护套的导热系数≤0.05W/(m.K),使该护套具有隔热性能,可以保护内部的光单元不受外界温度影响,延长光单元的使用寿命。
2. 本发明低烟无卤阻燃低压电缆,其在配方进一步添加了乙氧基化三羟甲基丙烷三丙烯酸酯和二丁基二硫代氨基甲酸锌,改善护套的韧性,增加其断裂伸长率,使护套在经受外力作用下不会断裂。
具体实施方式
下面结合实施例对本发明作进一步描述:
实施例:一种低烟无卤阻燃低压电缆,包括若干导体和光单元,所述导体和光单元绞合在一起,所述导体和光单元外侧设有包带,所述包带中嵌有一根撕裂绳,所述包带外侧设有外护套,所述导体外侧设有绝缘护套,所述光单元外侧设有光单元护套;
光单元护套由以下组分组成:乙烯-醋酸乙烯酯共聚物60份、线性低密度聚乙烯10份、三元乙丙橡胶20份、乙烯基三乙氧基硅烷1份、硫代二丙酸双十二烷酯1.2份、硅酮母粒0.7份、氧化铅粉末3份、乙氧基化三羟甲基丙烷三丙烯酸酯4份、N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐1.5份、二丁基二硫代氨基甲酸锌0.7份、三乙基己基磷酸1份、分散剂0.6份。
所述乙烯-醋酸乙烯酯共聚物的醋酸乙烯占乙烯-醋酸乙烯酯共聚物总重量的40%;所述三元乙丙橡胶是乙烯、丙烯和非共轭二烯烃的三元共聚物,其中乙烯、丙烯比为80:20;所述线性低密度聚乙烯的密度为0.910~0.915g/cm3。
该低烟无卤阻燃低压电缆通过以下步骤制得:
S1. 将乙烯-醋酸乙烯酯共聚物、线性低密度聚乙烯和三元乙丙橡胶加入到密炼机中,在60-80℃混炼5-10min,得到物料A;
S2. 将乙烯基三乙氧基硅烷、硫代二丙酸双十二烷酯,硅酮母粒、氧化铅粉末、乙氧基化三羟甲基丙烷三丙烯酸酯、N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐、二丁基二硫代氨基甲酸锌、三乙基己基磷酸、分散剂加入到密炼机,在70~90℃混炼1~5min,得到物料B;
S3. 将物料A、B进行混炼后卸料到开炼机;
S4. 将物料A、B于开炼机上打三角包3~4次,开炼机辊温控制在60℃,最后在压延机上出片,得到光单元护套料。
对比例1~2:一种护套,包括以下重量份的材料:
表2
制备方法为常用方法。
各实施例和对比例制备的薄膜性能检测数据如下:
表3
如表3所示,对比例1与实施例相比缺少组分N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐,对比例1制得的护套的导热系数远大于实施例制得的光单元护套的导热系数,即对比例制得的护套的隔热性能差;
对比例2与实施例相比缺少组分乙氧基化三羟甲基丙烷三丙烯酸酯和二丁基二硫代氨基甲酸锌,对比例2制得的护套的断裂伸长率小于实施例制得的光单元护套的断裂伸长率,即对比例制得的护套的韧性差。
本发明各实施例中制备的光单元护套无论是拉伸强度、断裂伸长率,还是导热系数均优于对比例的光单元护套,本发明制得的光单元护套用于光单元保护上,能够隔绝外界高温,保护光单元内部的通讯材料,避免光单元的损坏。
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。
Claims (3)
1.一种低烟无卤阻燃低压电缆,其特征在于:包括若干导体和光单元,所述导体和光单元绞合在一起,所述导体和光单元外侧设有包带,所述包带中嵌有一根撕裂绳,所述包带外侧设有外护套,所述导体外侧设有绝缘护套,所述光单元外侧设有光单元护套;
所述光单元护套包括以下重量份的材料:乙烯-醋酸乙烯酯共聚物60份、线性低密度聚乙烯10份、三元乙丙橡胶20份、乙烯基三乙氧基硅烷1份、硫代二丙酸双十二烷酯1.2份、硅酮母粒0.7份、氧化铅粉末3份、乙氧基化三羟甲基丙烷三丙烯酸酯4份、N,N,N',N'-四[4-(二丁氨基)苯基]-1,4-苯二胺六氟锑酸盐1.5份、二丁基二硫代氨基甲酸锌0.7份、三乙基己基磷酸1份、分散剂0.6份。
2.根据权利要求1所述的低烟无卤阻燃低压电缆,其特征在于:所述乙烯-醋酸乙烯酯共聚物的醋酸乙烯占乙烯-醋酸乙烯酯共聚物总重量的40%。
3.根据权利要求1所述的低烟无卤阻燃低压电缆,其特征在于:所述三元乙丙橡胶是乙烯、丙烯和非共轭二烯烃的三元共聚物,其中乙烯、丙烯比为80:20。
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CN102977451A (zh) * | 2012-12-04 | 2013-03-20 | 苏州亨利通信材料有限公司 | 用于光缆的低烟无卤阻燃护套层 |
CN203134460U (zh) * | 2013-06-26 | 2013-08-14 | 烟台市电缆厂 | 一种光纤复合低压电缆 |
CN104910504A (zh) * | 2015-06-17 | 2015-09-16 | 宝胜科技创新股份有限公司 | 一种无卤低烟阻燃耐低温橡胶护套料及其制备方法 |
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CN112117050A (zh) | 2020-12-22 |
CN114420385A (zh) | 2022-04-29 |
CN114316416A (zh) | 2022-04-12 |
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CN112117050B (zh) | 2021-10-29 |
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