CN1198889C - 抗局部放电的导线涂料组合物和抗局部放电的磁导线 - Google Patents
抗局部放电的导线涂料组合物和抗局部放电的磁导线 Download PDFInfo
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Abstract
本发明提供了一种抗局部放电的导线搪瓷组合物,其中分散有选自金属氧化物微粒溶胶和氧化硅微粒溶胶的至少一种微粒溶胶,且每100重量份导线搪瓷涂料树脂中,含有3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒。因此可以得到具有优异的无机微粒分散性的抗局部放电的导线搪瓷组合物。
Description
技术领域
本发明涉及抗局部放电的导线涂料组合物和抗局部放电的磁导线。
背景技术
电绝缘材料的局部放电损坏的原理据推测是由局部放电所产生的已充电颗粒与绝缘材料碰撞,碰撞导致绝缘材料的聚合物链断开,并且因溅射和局部升温引起热分解,另外,局部放电产生的臭氧引起化学损坏和绝缘材料损坏,这些损坏的发展最终导致电动机械线圈的绝缘失效。
近来广泛使用的变换控制装置中的局部放电损坏据推测是由这种现象造成的,即一个高压冲击重叠成为一个变换脉冲,导致变换控制装置线圈的损坏。
与此相反,经模压绝缘处理或夹层绝缘处理的常用高压转换器中的局部放电损坏是由绝缘层中产生的细微空腔造成的。
作为不容易被局部放电损坏的绝缘材料,公知的是诸如金属氧化物、金属氮化物、玻璃、云母等的无机绝缘材料。
另外,作为具有优异的抗局部放电损坏的磁导线,公知的是通过涂覆导线涂料组合物制备的磁导线,该组合物通过将诸如二氧化硅、氧化铝、氧化钛等的无机绝缘材料微粉分散来制备。
在这种抗局部放电的的磁导线中,绝缘涂料中无机绝缘材料微粉的含量越高,抗局部放电损坏的能力越强。
然而,在绝缘涂料中含有大量无机绝缘材料微粉的磁导线中,柔韧性、软化性能、卷绕性能、可拉伸性能等都变差。如果电动机械线圈用柔韧性、软化性能、卷绕性能、可拉伸性能等都变差的磁导线制成,在磁导线的涂层中将形成许多裂纹。因此,就不能发挥提高抗局部放电损坏能力的作用。
一种具有多层结构的分散有无机绝缘材料的磁导线可用于同时满足提高抗局部放电的损坏能力和改善柔韧性、软化性能、卷绕性能、可拉伸性能等的要求。
图1和2示出这种具有多层结构的分散有无机绝缘材料的磁导线的剖面图。在图1和2中,1表示导体,2表示聚酰胺-酰亚胺底涂层,3表示分散有无机绝缘材料的导线涂料组合物涂层,4表示聚酰胺-酰亚胺面涂层。
图1中所示的具有多层结构的分散有无机绝缘材料的磁导线包括导体1、涂覆在导体1上的分散有无机绝缘材料的导线涂料组合物涂层3,以及涂覆在分散有无机绝缘材料的导线涂料组合物涂层3上的聚酰胺-酰亚胺面涂层4。
图2中所示的具有多层结构的分散有无机绝缘材料的磁导线包括导体1、涂覆在导体1上的聚酰胺-酰亚胺底涂层2、涂覆在聚酰胺-酰亚胺底涂层2上的分散有无机绝缘材料的导线涂料组合物涂层3,以及涂覆在分散有无机绝缘材料的导线涂料组合物涂层3上的聚酰胺-酰亚胺面涂层4。
然而,在图1和图2中所示的上述磁导线中,大量无机绝缘材料分散在分散有无机绝缘材料的导线涂料组合物涂层3中,因此,柔韧性、软化性能、卷绕性能、可拉伸性能等必然不如那些普通的经涂覆导线。例如,如果将这些磁导线拉伸10%后卷绕,在分散有无机绝缘材料的导线涂料组合物涂层3上就形成裂纹。
另外,在分散了大量无机绝缘材料的导线涂料组合物中,由于无机绝缘材料沉积或泛白的结果,显示出对磁导线表面光滑度变差或电绝缘性和机械性能降低的担忧。
发明内容
基于上述问题提出了本发明,其目的是解决上述现有技术的问题,并提供一种其中的无机绝缘材料具有优异分散性的抗局部放电的导线涂料组合物,和同时具有柔韧性和抗局部放电损坏性的抗局部放电的磁导线。
本发明的抗局部放电的导线涂料组合物是其中分散有选自金属氧化物微粒溶胶和氧化硅微粒溶胶的至少一种微粒溶胶的导线涂料组合物,所述导线涂料组合物含有100重量份导线涂料树脂和3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒。
另外,本发明的抗局部放电的磁导线是通过直接在导体上或在导体上的其他涂层上涂覆抗局部放电的导线涂料组合物并烘烤而得到的磁导线,所述导线涂料组合物中分散有选自金属氧化物微粒溶胶和氧化硅微粒溶胶的至少一种微粒溶胶,并含有100重量份导线涂料树脂和3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒。
在本发明中,对于每100重量份的导线涂料组合物中导线涂料树脂的含量,选自金属氧化物微粒和氧化硅微粒的微粒的含量为3~100重量份。如果含量小于3重量份,改善抗局部放电损坏的效果就不足,如果超过100重量份,柔韧性和抗拉伸性能将变差。
本发明的前景是,将含有与导线涂料组合物具有优异相容性的分散介质和分散在其中的选自金属氧化物微粒和氧化硅微粒的至少一种微粒的透明或乳白色的胶体(该胶体指溶胶),分散在导线涂料组合物中,使微粒均匀分散。此时,优选的是使用平均粒径为100nm(100×10-9m)或更小的金属氧化物微粒或氧化硅微粒,以实现导线涂料组合物涂层的光滑或柔韧性。
在本发明的磁导线中,由其中分散有选自金属氧化物微粒溶胶和氧化硅微粒溶胶的至少一种微粒溶胶的导线涂料组合物组成的涂层可形成最外层。本发明磁导线的另一部分是给磁导线带来优异的滑动性能的润滑涂层,该涂层可在由本发明导线涂料组合物组成的涂层上形成。
附图简述
图1是面涂了聚酰胺-酰亚胺的分散有无机绝缘材料的普通磁导线的剖面图。
图2是底涂了聚酰胺-酰亚胺、面涂了聚酰胺-酰亚胺的分散有无机绝缘材料的普通磁导线剖面图。
图3是实施例1的抗局部放电的经涂覆导线的剖面图。
图4是实施例3的面涂了润滑的聚酰胺-酰亚胺的抗局部放电的磁导线的剖面图。
优选实施方案描述
以下描述本发明的抗局部放电的导线涂料组合物和抗局部放电的磁导线的
实施例。
在本发明中,铜线、铝线、镍线等可用作导体。
本发明的基本导线涂料可以是所有工业可用的导线涂料组合物,包括例如缩甲醛导线涂料组合物、聚酯导线涂料组合物、聚酯酰亚胺导线涂料组合物、聚酰胺-酰亚胺导线涂料组合物、聚酰亚胺导线涂料组合物等。
本发明优选使用的金属氧化物微粒溶胶在导线涂料组合物中具有优异的可分散性并具有改善抗局部放电性的能力,它包括例如氧化铝微粒溶胶、氧化锆微粒溶胶、氧化钛微粒溶胶、氧化钇微粒溶胶等。本发明中优选使用的氧化硅微粒溶胶例如是二氧化硅微粒溶胶。另外,这些溶胶可以是溶剂可替代的。
本发明中优选使用的用于金属氧化物微粒溶胶或氧化硅微粒溶胶的分散介质与导线涂料组合物有优异的可容性,如水、甲醇、二甲基乙酰胺、甲基乙基异丁基酮、二甲苯/丁醇混合溶剂等。
另外,如果普通金属氧化物或氧化硅以微粒状态分散在导线涂料组合物中,则只有在每100重量份的包含在导线涂料组合物中的导线涂料树脂中,金属氧化物或氧化硅的含量达到50重量份或更多时,经涂覆导线的抗局部放电损坏性才会得到改善。另一方面,在本发明中,即使金属氧化物微粒或氧化硅微粒的用量为3重量份,也能对提高抗局部放电的损坏性能发挥显著作用。其原因是通过将金属氧化物微粒溶胶或氧化硅微粒溶胶分散在导线涂料组合物中,就得到表现出均匀分散性的抗局部放电的导线涂料组合物,而通过将这种抗局部放电的导线涂料组合物涂覆在导体上,就能得到同时具有优异的延伸性和抗局部放电损坏性的抗局部放电的经涂覆导线。
同样,本发明的抗局部放电的磁导线除了具有优异的延伸性和抗局部放电损坏性外,还表现出各种优异的性能,如外观、封闭附着力、柔韧性等。由于这种原因,在本发明的抗局部放电的磁导线中,底涂层或面涂层就可省去。当然,如果需要,在本发明的抗局部放电的导线涂料组合物涂层下或涂层上可提供底涂层或面涂层。
另外,在本发明的抗局部放电的磁导线中,如果需要,也可以提供自润滑涂层作为最外层。
实施例
以下列举本发明的抗局部放电的导线涂料组合物和抗局部放电的磁导线的
实施例和比较例。
(实施例1)
将二氧化硅溶胶(分散介质:二甲苯/丁醇,二氧化硅的平均粒径:12nm)加入三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有20重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有二氧化硅微粒的导线涂料组合物涂层。
图3表示这样得到的实施例1的抗局部放电的磁导线的剖面图。在图3中,1表示导体,10表示分散有微粒溶胶的导线涂料组合物涂层。
(实施例2)
将二氧化硅溶胶(分散介质:二甲苯/丁醇,二氧化硅的平均粒径:12nm)加入三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有60重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有二氧化硅微粒的导线涂料组合物涂层。
(实施例3)
将二氧化硅溶胶(分散介质:二甲苯/丁醇,二氧化硅的平均粒径:12nm)加入三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有30重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到32μm厚的分散有二氧化硅微粒的导线涂料组合物涂层。
另外,将润滑的聚酰胺-酰亚胺导线涂料组合物(HI-406SL,日立化学公式制造)涂覆在抗局部放电的导线涂料组合物涂层上,通过涂覆和烘烤得到3μm厚的自润滑涂层。
图4表示实施例3润滑的抗局部放电的磁导线的剖面图。在图4中,1表示导体,10表示分散有二氧化硅溶胶的导线涂料组合物涂层,11表示润滑的聚酰胺-酰亚胺外涂层。
(实施例4)
将二氧化硅溶胶(分散介质:二甲基乙酰胺,二氧化硅的平均粒径:30nm)加入聚酰胺-酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有40重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有二氧化硅微粒溶胶的导线涂料组合物涂层。
(实施例5)
将二氧化硅溶胶(分散介质:二甲基乙酰胺,二氧化硅的平均粒径:30nm)加入聚酰胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有40重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有二氧化硅微粒溶胶的导线涂料组合物涂层。
(实施例6)
将氧化锆溶胶(分散介质:水,氧化锆的平均粒径:70nm)加入聚酰胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有40重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有金属氧化物微粒溶胶的导线涂料组合物涂层。
(实施例7)
将氧化铝溶胶(分散介质:水,氧化铝的平均粒径:10~20nm)加入聚酰胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有40重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有金属氧化物微粒溶胶的导线涂料组合物涂层。
(实施例8)
将聚酰胺-酰亚胺导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆4次并烘烤,得到20μm厚的聚酰胺-酰亚胺导线涂料组合物涂层。
将二氧化硅溶胶(分散介质:二甲基乙酰胺,氧化铝的平均粒径:12nm)加入聚酰胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有40重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在聚酰胺-酰亚胺导线涂料组合物涂层上,涂覆2次并烘烤,得到10μm厚的分散有二氧化硅微粒溶胶的导线涂料组合物涂层。
另外,通过涂覆和烘烤将聚酰胺-酰亚胺导线涂料组合物涂覆在分散有二氧化硅微粒溶胶的导线涂料组合物涂层上,得到5μm厚的聚酰胺-酰亚胺导线涂料组合物涂层。
该实施例8的抗局部放电的磁导线是具有聚酰胺-酰亚胺底涂层、抗局部放电的中间涂层和聚酰胺-酰亚胺面涂层的三层结构的磁导线。
(比较例1)
将二氧化硅溶胶(分散介质:二甲苯/丁醇,二氧化硅的平均粒径:12nm)加入三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有2重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有二氧化硅微粒的导线涂料组合物涂层。
(比较例2)
将二氧化硅溶胶加入三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到每100重量份导线涂料树脂中含有120重量份二氧化硅微粒的抗局部放电的导线涂料组合物。
然后,将所得抗局部放电的导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的分散有金属氧化物微粒溶胶的导线涂料组合物涂层。
(比较例3)
将三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆4次并烘烤,得到20μm厚的聚酯酰亚胺导线涂料组合物涂层。
将65重量份二氧化硅微粒(不以溶胶形式,平均粒径:50nm)加入100重量份三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物中,搅拌混合得到抗局部放电的导线涂料组合物。
通过2次涂覆和烘烤,将所得抗局部放电的导线涂料组合物涂覆在聚酯酰亚胺导线涂料组合物涂层上,得到10μm厚的分散有二氧化硅微粒的导线涂料组合物涂层。
另外,将聚酰胺-酰亚胺导线涂料组合物涂覆在分散有二氧化硅微粒的导线涂料组合物涂层上,得到5μm厚的聚酰胺-酰亚胺导线涂料组合物涂层。
该比较例3的抗局部放电的磁导线是具有聚酯酰亚胺底涂层、抗局部放电的的中间涂层和聚酰胺-酰亚胺面涂层的三层结构的磁导线。
(比较例4)
将三-(羟乙基异氰尿酸酯)改性的聚酯酰亚胺导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的聚酯酰亚胺导线涂料组合物涂层。
(比较例5)
将聚酰胺-酰亚胺导线涂料组合物涂覆在直径1.0mm的铜导体上,涂覆7次并烘烤,得到35μm厚的聚酰胺-酰亚胺导线涂料组合物涂层。
实施例和比较例的磁导线的结构和性能示于表1到表5中。磁导线通用性能的测试根据JIS-C3003进行。抗局部放电的性能的评价通过以下方法进行:将磁导线试样在正常条件下进行V-t性能测试(电压-局部放电寿命时间性能测试)、拉伸10%后的V-t性能测试(电压-局部放电寿命时间性能测试),和拉伸20%后的V-t性能测试(电压-局部放电寿命时间性能测试)。在表1到5中,三-(羟乙基异氰尿酸酯)缩写为THEIC。
表1
实施例1 | 实施例2 | 实施例3 | |||
导线涂料组合物 | THEIC改性的聚酯酰亚胺树脂 | 100 | 100 | 100 | |
聚酰胺-酰亚胺树脂 | - | - | - | ||
聚酰亚胺树脂 | - | - | - | ||
二氧化硅溶胶(二氧化硅含量) | 20 | 60 | 30 | ||
氧化锆溶胶(氧化锆含量) | - | - | - | ||
氧化铝溶胶(氧化铝含量) | - | - | - | ||
二氧化硅微粒 | - | - | - | ||
磁导线的结构 | 底涂层 | 含二氧化硅的THEIC改性的聚酯酰亚胺 | 含二氧化硅的THEIC改性的聚酯酰亚胺 | 含二氧化硅的THEIC改性的聚酯酰亚胺 | |
中间涂层 | - | - | - | ||
面涂层 | - | - | 润滑的聚酰胺-酰亚胺 | ||
磁导线的性能 | 尺寸(mm) | 导体直径 | 1.000 | 0.999 | 1.000 |
底涂层厚度 | 0.035 | 0.036 | 0.032 | ||
中间涂层厚度 | - | - | - | ||
面涂层厚度 | - | - | 0.003 | ||
总体直径 | 1.070 | 1.069 | 1.070 | ||
外观 | 透明EIW色 | 透明EIW色 | 透明AIW色 | ||
柔韧性(20%拉伸缠绕) | 1d | 1d | 1d | ||
滑动性能(静摩擦系数) | 0.11 | 0.09 | 0.05 | ||
涂层硬度(铅笔法) | 7H | 8H | 7H | ||
绝缘击穿电压(kV) | 正常条件 | 16.0 | 15.6 | 15.8 | |
10%拉伸 | 15.6 | 15.0 | 15.5 | ||
20%拉伸 | 15.0 | 15.0 | 14.6 | ||
V-t性能(h)10kHz-1.5kV正弦波 | 正常条件 | 42.7 | 65.2 | 41.0 | |
10%拉伸 | 38.6 | 28.2 | 39.0 | ||
20%拉伸 | 11.3 | 5.8 | 9.1 |
表2
实施例4 | 实施例5 | 实施例6 | |||
导线涂料组合物 | THEIC改性的聚酯酰亚胺树脂 | - | - | - | |
聚酰胺-酰亚胺树脂 | 100 | - | - | ||
聚酰亚胺树脂 | - | 100 | 100 | ||
二氧化硅溶胶(二氧化硅含量) | 40 | 40 | - | ||
氧化锆溶胶(氧化锆含量) | - | - | 40 | ||
氧化铝溶胶(氧化铝含量) | - | - | - | ||
二氧化硅微粒 | - | - | - | ||
磁导线的结构 | 底涂层 | 含二氧化硅的聚酰胺-酰亚胺 | 含二氧化硅的聚酰亚胺 | 含氧化锆的聚酰亚胺 | |
中间涂层 | - | - | - | ||
面涂层 | - | - | - | ||
磁导线的性能 | 尺寸(mm) | 导体直径 | 1.000 | 1.000 | 0.999 |
底涂层厚度 | 0.035 | 0.035 | 0.035 | ||
中间涂层厚度 | - | - | - | ||
面涂层厚度 | - | - | - | ||
总体直径 | 1.070 | 1.069 | 1.069 | ||
外观 | 透明EIW色 | 透明PIW色 | 半透明乳白PIW色 | ||
柔韧性(20%拉伸缠绕) | 1d | 1d | 1d | ||
滑动性能(静摩擦系数) | 0.10 | 0.10 | 0.11 | ||
涂层硬度(铅笔法) | 8H | 7H | 7H | ||
绝缘击穿电压(kV) | 正常条件 | 16.8 | 16.0 | 14.8 | |
10%拉伸 | 16.5 | 15.5 | 13.8 | ||
20%拉伸 | 15.6 | 15.5 | 13.6 | ||
V-t性能(h)10kHz-1.5kV正弦波 | 正常条件 | 42.0 | 52.1 | 48.0 | |
10%拉伸 | 40.0 | 36.9 | 40.5 | ||
20%拉伸 | 10.1 | 12.6 | 6.9 |
表3
实施例7 | 实施例8 | |||
导线涂料组合物 | THEIC改性的聚酯酰亚胺树脂 | - | - | |
聚酰胺-酰亚胺树脂 | - | 100 | ||
聚酰亚胺树脂 | 100 | - | ||
二氧化硅溶胶(二氧化硅含量) | - | - | ||
氧化锆溶胶(氧化锆含量) | 40 | - | ||
氧化铝溶胶(氧化铝含量) | - | 40 | ||
二氧化硅微粒 | - | - | ||
磁导线的结构 | 底涂层 | 含氧化铝的聚酰亚胺 | 聚酰胺-酰亚胺 | |
中间涂层 | - | 含二氧化硅的聚酰胺-酰亚胺 | ||
面涂层 | - | 聚酰胺-酰亚胺 | ||
磁导线的性能 | 尺寸(mm) | 导体直径 | 0.999 | 1.000 |
底涂层厚度 | 0.035 | 0.020 | ||
中间涂层厚度 | - | 0.010 | ||
面涂层厚度 | - | 0.005 | ||
总体直径 | 1.069 | 1.070 | ||
外观 | 半透明乳白PIW色 | 透明AIW色 | ||
柔韧性(20%拉伸缠绕) | 1d | 1d | ||
滑动性能(静摩擦系数) | 0.11 | 0.14 | ||
涂层硬度(铅笔法) | 7H | 7H | ||
绝缘击穿电压(kV) | 正常条件 | 14.6 | 16.2 | |
10%拉伸 | 14.4 | 15.9 | ||
20%拉伸 | 14.2 | 15.5 | ||
V-t性能(h)10kHz-1.5kV正弦波 | 正常条件 | 44.5 | 16.7 | |
10%拉伸 | 38.0 | 14.2 | ||
20%拉伸 | 15.0 | 9.5 |
表4
比较例1 | 比较例2 | |||
导线涂料组合物 | THEIC改性的聚酯酰亚胺树脂 | 100 | 100 | |
聚酰胺-酰亚胺树脂 | - | - | ||
聚酰亚胺树脂 | - | - | ||
二氧化硅溶胶(二氧化硅含量) | 2 | 120 | ||
氧化锆溶胶(氧化锆含量) | - | - | ||
氧化铝溶胶(氧化铝含量) | - | - | ||
二氧化硅微粒 | - | - | ||
磁导线的结构 | 底涂层 | 含二氧化硅的THEIC改性的聚酯酰亚胺 | 含二氧化硅的THEIC改性的聚酯酰亚胺 | |
中间涂层 | - | - | ||
面涂层 | - | - | ||
磁导线的性能 | 尺寸(mm) | 导体直径 | 1.000 | 1.000 |
底涂层厚度 | 0.035 | 0.035 | ||
中间涂层厚度 | - | - | ||
面涂层厚度 | - | - | ||
总体直径 | 1.070 | 1.070 | ||
外观 | 透明EIW色 | 透明EIW色 | ||
柔韧性(20%拉伸缠绕) | 1d | 3d | ||
滑动性能(静摩擦系数) | 0.13 | 0.09 | ||
涂层硬度(铅笔法) | 6H | 9H | ||
绝缘击穿电压(kV) | 正常条件 | 16.3 | 15.4 | |
10%拉伸 | 16.1 | 15.0 | ||
20%拉伸 | 15.6 | 14.9 | ||
V-t性能(h)10kHz-1.5kV正弦波 | 正常条件 | 1.5 | 63.5 | |
10%拉伸 | 1.3 | 2.9 | ||
20%拉伸 | 1.0 | 0.13 |
表5
比较例3 | 比较例4 | 比较例5 | |||
导线涂料组合物 | THEIC改性的聚酯酰亚胺树脂 | 100 | 100 | - | |
聚酰胺-酰亚胺树脂 | - | - | 100 | ||
聚酰亚胺树脂 | - | - | - | ||
二氧化硅溶胶(二氧化硅含量) | - | - | - | ||
氧化锆溶胶(氧化锆含量) | - | - | - | ||
氧化铝溶胶(氧化铝含量) | - | - | - | ||
二氧化硅微粒 | 65 | - | - | ||
磁导线的结构 | 底涂层 | THEIC改性的聚酯酰亚胺 | THEIC改性的聚酯酰亚胺 | 聚酰胺-酰亚胺 | |
中间涂层 | 含二氧化硅微粉的聚酯酰亚胺 | - | - | ||
面涂层 | - | - | - | ||
磁导线的性能 | 尺寸(mm) | 导体直径 | 1.000 | 1.000 | 0.999 |
底涂层厚度 | 0.020 | 0.035 | 0.035 | ||
中间涂层厚度 | 0.010 | - | - | ||
面涂层厚度 | 0.005 | - | 0.003 | ||
总体直径 | 1.070 | 1.070 | 1.069 | ||
外观 | 已变白 | 透明EIW色 | 透明AIW色 | ||
柔韧性(20%拉伸缠绕) | 2d(中间涂层有裂纹) | 1d | 1d | ||
滑动性能(静摩擦系数) | 0.14 | 0.14 | 0.13 | ||
涂层硬度(铅笔法) | 6H | 5H | 6H | ||
绝缘击穿电压(kV) | 正常条件 | 12.5 | 16.0 | 16.7 | |
10%拉伸 | 10.0 | 15.8 | 16.7 | ||
20%拉伸 | 7.1 | 15.7 | 16.5 | ||
V-t性能(h)10kHz-1.5kV正弦波 | 正常条件 | 5.8 | 0.33 | 0.18 | |
10%拉伸 | 0.20 | 0.30 | 0.17 | ||
20%拉伸 | 0.10 | 0.28 | 0.17 |
从表1到5可知,在比较例1的抗局部放电的磁导线中,其中分散的二氧化硅溶胶用量仅为2重量份二氧化硅含量,正常条件下和拉伸后的V-t性能(抗局部放电的性能)相当差,达1.0~1.5小时。
在比较例2的抗局部放电的磁导线中,其中分散的二氧化硅溶胶用量为120重量份二氧化硅含量,正常条件下的抗局部放电的性能优异,然而,拉伸后的抗局部放电的性能相当差,达1.03~2.9小时。
在比较例3的普通型抗局部放电的磁导线中,拉伸后的抗局部放电的性能相当差,达0.1~0.2小时。在比较例4的聚酯酰亚胺磁导线中,拉伸后的抗局部放电的性能相当差,达0.28~0.3小时。在比较例5的聚酰胺-酰亚胺磁导线中,正常条件下和拉伸后的抗局部放电的性能相当差,达0.17~0.18小时。
然而,在实施例1到8的抗局部放电的经涂覆导线中,各种常规性能如外观、柔韧性、涂层硬度、绝缘击穿电压等都很优异,而优异的抗拉伸性能和优异的抗局部放电的损坏性能也同时得到满足。
本发明的抗局部放电的导线涂料组合物具有优异的均匀分散性和透明性,因而,如果将本发明的抗局部放电的导线涂料组合物涂覆并烘烤附着在导线上,就能得到同时具有优异的抗拉伸性能和优异的抗局部放电损坏性的抗局部放电的磁导线。这样得到的本发明抗局部放电的经涂覆导线在各种常规性能如外观、柔韧性、涂层硬度、绝缘击穿电压等上也是优异的,这在工业上是很有用的。
Claims (5)
1、一种抗局部放电的导线涂料组合物,所述导线涂料组合物含有100重量份导线涂料树脂和3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒,其中所述微粒分散在与导线涂料组合物具有优异相容性的分散介质中,并呈溶胶状态,其平均粒径为100nm或更小。
2、权利要求1的抗局部放电的导线涂料组合物,其中金属氧化物微粒溶胶和氧化硅微粒溶胶是透明或乳白色的胶质液体。
3、一种通过将导线涂料组合物直接涂覆在导体上或涂覆在导体上的其它涂层上并烘烤而得到的抗局部放电的磁导线,所述导线涂料组合物含有100重量份导线涂料树脂和3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒,其中所述微粒分散在与导线涂料组合物具有优异相容性的分散介质中,并呈溶胶状态,其平均粒径为100nm或更小。
4、权利要求3的抗局部放电的磁导线,其中金属氧化物微粒溶胶和氧化硅微粒溶胶是透明或乳白色的胶质液体。
5、一种由如下方法得到的抗局部放电的经涂覆导线,给通过将导线涂料组合物直接涂覆在导体上或涂覆在导体上的其它涂层上并烘烤而制成的涂层的外围提供润滑涂层,所述导线涂料组合物中,相对于100重量份导线涂料树脂,含有3~100重量份选自金属氧化物微粒和氧化硅微粒的至少一种微粒,其中所述微粒分散在与导线涂料组合物具有优异相容性的分散介质中,并呈溶胶状态,其平均粒径为100nm或更小。
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