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环氧树脂板厂家

作者:扬州华工电气 关键词: 日期:2017-06-23 13:53:51 人气: 标签:环氧树脂板厂家

一、环氧树脂板厂家简介
   环氧树脂是泛指分子中含有两个或两个以上环氧基团的****高分子化合物,除个别外,它们的相对分子质量都不高。环氧树脂的分子结构是以分子链中含有活泼的环氧基团为其特征,环氧基团可以位于分子链的末端、中间或成环状结构。由于分子结构中含有活泼的环氧基团,使它们可与多种类型的固化剂发生交联反应而形成不溶、不熔的具有三向网状结构的高聚物。

二、环氧树脂板厂家应用特性
1、 形式多样。各种树脂、固化剂、改性剂体系几乎可以适应各种应用对形式提出的要求,其范围可以从极低的粘度到高熔点固体。
2、 固化方便。选用各种不同的固化剂,环氧树脂体系几乎可以在0~180℃温度范围内固化。
3、 粘附力强。环氧树脂分子链中固有的极性羟基和醚键的存在,使其对各种物质具有很高的粘附力。环氧树脂固化时的收缩性低,产生的内应力小,这也有助于提高粘附强度。
4、 收缩性低。环氧树脂和所用的固化剂的反应是通过直接加成反应或树脂分子中环氧基的开环聚合反应来进行的,没有水或其它挥发性副产物放出。它们和不饱和聚酯树脂、酚醛树脂相比,在固化过程中显示出很低的收缩性(小于2%)。
5、 力学性能。固化后的环氧树脂体系具有优良的力学性能。
6、 电性能。固化后的环氧树脂体系是一种具有高介电性能、耐表面漏电、耐电弧的优良绝缘材料。
7、 化学稳定性。通常,固化后的环氧树脂体系具有优良的耐碱性、耐酸性和耐溶剂性。像固化环氧体系的其它性能一样,化学稳定性也取决于所选用的树脂和固化剂。适当地选用环氧树脂和固化剂,可以使其具有特殊的化学稳定性能。
8、 尺寸稳定性。上述的许多性能的综合,使环氧树脂体系具有突出的尺寸稳定性和耐久性。
9、 耐霉菌。固化的环氧树脂体系耐大多数霉菌,可以在苛刻的热带条件下使用。

三、环氧树脂板厂家技术参数

1、外观 表面应平滑,无气泡、皱纹和裂纹。
2、标称厚度及允许偏差见表1。
表1  mm 

<**** border="1" cellpadding="0" cellspacing="0" ****="border-spacing:0px;color:#000000;font-family:宋体, helvetica, arial, sans-serif;font-size:12px;line-height:28px;width:715px;"><****><****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:#cccccc;">标称厚度<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:#cccccc;">偏差<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:#cccccc;">标准厚度<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:#cccccc;">偏差<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">0.4<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.10<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">8.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±0.72<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">0.5<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.12<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">10.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±0.82<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">0.6<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.13<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">12.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±0.94<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">0.8<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.16<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">14.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.02<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">1.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.18<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">16.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.12<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">1.2<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.20<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">20.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.30<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">1.6<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.24<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">25.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.50<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">2.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.28<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">30.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.70<****><**** colspan="2" ****="margin:0px;padding:0px;width:90.1pt;background-color:****ansparent;">2.5<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.33<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">35.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±1.95<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:88.95pt;background-color:****ansparent;">3.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.37<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">40.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±2.10<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:88.95pt;background-color:****ansparent;">4.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.45<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">45.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±2.30<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:88.95pt;background-color:****ansparent;">5.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.52<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">50.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±2.45<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:88.95pt;background-color:****ansparent;">6.0<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">±0.60<**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">60.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±2.50<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:88.95pt;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:108.4pt;background-color:****ansparent;">80.0<**** ****="margin:0px;padding:0px;width:101.55pt;background-color:****ansparent;">±2.80<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** colspan="4" ****="margin:0px;padding:0px;width:407.3pt;background-color:****ansparent;">注: 1 其他允许偏差可由供需双方协商。 2 对于标称厚度不在所列的优选厚度之一者,其允许偏差应采用下一个较大的优选厚度的偏差。


3、平直度见表2。表2 层压板表面距直尺的允许偏差mm

<**** border="1" cellpadding="0" cellspacing="0" ****="border-spacing:0px;color:#000000;font-family:宋体, helvetica, arial, sans-serif;font-size:12px;line-height:28px;width:715px;"><****><****><**** rowspan="2" ****="margin:0px;padding:0px;width:124.5pt;background-color:#cccccc;">厚度 (d)<**** colspan="2" ****="margin:0px;padding:0px;width:277.5pt;background-color:#cccccc;">直尺长度<****><**** ****="margin:0px;padding:0px;width:5cm;background-color:#cccccc;">1000<**** ****="margin:0px;padding:0px;width:135pt;background-color:#cccccc;">500<****><**** ****="margin:0px;padding:0px;width:124.5pt;background-color:****ansparent;">1.6≤d≤3 3<> 6<> 8< d<**** ****="margin:0px;padding:0px;width:5cm;background-color:****ansparent;">见注 10 8 6<**** ****="margin:0px;padding:0px;width:135pt;background-color:****ansparent;">见注 2.5 2.0 1.5<****><**** colspan="3" ****="margin:0px;padding:0px;width:401.25pt;background-color:****ansparent;">>注:对标称厚度在1.6 mm≤d≤3 mm的允许偏差正在考虑之中


4、性能要求见表4。表4性能要求

<**** border="1" cellpadding="0" cellspacing="0" ****="border-spacing:0px;color:#000000;font-family:宋体, helvetica, arial, sans-serif;font-size:12px;line-height:28px;width:715px;"><****><****><**** colspan="2" ****="margin:0px;padding:0px;width:37.6pt;background-color:#cccccc;">序 号<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:#cccccc;">指 标 名 称<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:#cccccc;">单 位<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:#cccccc;">指 标 值<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:#cccccc;">说明<****><**** colspan="2" ****="margin:0px;padding:0px;width:37.6pt;background-color:****ansparent;">1<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">垂直层向弯曲强度<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">MPa<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥340<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-<****><**** colspan="2" ****="margin:0px;padding:0px;width:37.6pt;background-color:****ansparent;">2<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">平行层向冲击强度 (简支梁法)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">KJ/<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥33<**** rowspan="2" ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">两者之一满足本标准要求即可<****><**** colspan="2" ****="margin:0px;padding:0px;width:37.6pt;background-color:****ansparent;">3<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">平行层向冲击强度 (悬臂梁法)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">kJ/<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥34<****><**** colspan="2" ****="margin:0px;padding:0px;width:37.6pt;background-color:****ansparent;">4<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">垂直层向电气强度 (90℃±2℃油中)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">MV/m<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">见表5<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">5<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">平行层向击穿电压 (90℃±2℃油中)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">kV<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥35<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">6a<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">介电常数 (48Hz-62Hz以下)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">-<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≤5.5<**** rowspan="2" ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">两者之一满足本标准要求即可<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">6b<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">介电常数 (1MHz以下)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">-<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≤5.5<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">7<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">马丁温度纵向<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;"><**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥200<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">8<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">热稳定性<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;"><**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">200<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">9<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">耐油性变压器油中4h<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;"><**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">130<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">10<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">拉伸强度纵向 横向<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">MPa<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥314 ≥216<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">11<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">粘合强度<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">N<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥5600<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">12<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">表面电阻率常态时 浸水后<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;"><**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥1× ≥1×<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">13<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">体积电阻率常态时 浸水后<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">MΩ·m<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥1× ≥1×<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">14<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">平行层向绝缘电阻常态时 浸水后<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;"><**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥1× ≥1×<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;"> <****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">15a<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">介质损耗因数 (48Hz-62Hz以下)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">-<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≤0.04<**** rowspan="2" ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">两者之一满足本标准要求即可<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">15b<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">介质损耗因数 (1MHz以下)<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">-<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≤0.04<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">16<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">浸水后绝缘电阻<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">Ω<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">≥5.0×<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">17<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">密度<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">g/<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">(1.7-1.9)<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-<****><**** ****="margin:0px;padding:0px;background-color:****ansparent;"> <**** ****="margin:0px;padding:0px;width:36.45pt;background-color:****ansparent;">18<**** ****="margin:0px;padding:0px;width:149.7pt;background-color:****ansparent;">吸水性<**** ****="margin:0px;padding:0px;width:63.2pt;background-color:****ansparent;">mg<**** ****="margin:0px;padding:0px;width:73.7pt;background-color:****ansparent;">见表6<**** ****="margin:0px;padding:0px;width:84.25pt;background-color:****ansparent;">-


表5垂直层向电气强度

<**** border="1" cellpadding="0" cellspacing="0" ****="border-spacing:0px;color:#000000;font-family:宋体, helvetica, arial, sans-serif;font-size:12px;line-height:28px;width:715px;"><****><****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">平均厚度 mm<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">电气强度 MV/m<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">厚度 mm<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">电气强度 MV/m<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.4<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥16.9<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">1.6<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥12.7<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.5<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥16.1<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">1.8<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥12.2<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.6<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥15.6<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.0<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥11.8<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.7<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥15.2<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.2<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥11.4<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.8<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥14.8<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.4<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥11.1<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">0.9<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥14.5<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.5<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥10.9<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">1.0<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥14.2<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.6<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥10.8<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">1.2<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥13.7<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">2.8<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥10.5<****><**** ****="margin:0px;padding:0px;width:64.05pt;background-color:#cccccc;">1.4<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥13.2<**** ****="margin:0px;padding:0px;width:64pt;background-color:#cccccc;">3.0<**** ****="margin:0px;padding:0px;width:140.2pt;background-color:#cccccc;">≥10.2


注:1 对90℃±2℃油中垂直层向电气强度,可任选20s逐级升压和1min耐压试验要求中的一种。对符合二者之一要求的材料,应视其90℃±2℃油中垂直层向电气强度是符合本标准要求的。 2 如果测得的试样厚度算术平均值是介于表中两厚度之间,则其指标值应从内插法求取。如果测得的厚度算术平均值小于0.4mm,则其电气强度指标值取≥16.9MV/m。如果标称厚度为3mm,并且测得的厚度算术平均值大于3mm时,则其电气强度的指标值取≥10.2MV/m表6吸水性

<**** border="1" cellpadding="0" cellspacing="0" ****="border-spacing:0px;color:#000000;font-family:宋体, helvetica, arial, sans-serif;font-size:12px;line-height:28px;margin:auto auto auto 1.15pt;width:656px;"><****><****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:#cccccc;">试样厚度平均值 mm<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:#cccccc;">吸水性 mg<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:#cccccc;">试样厚度平均值 mm<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:#cccccc;">吸水性 mg<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">0.4<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤17<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">5<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤25<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">0.5<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤17<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">6<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤27<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">0.6<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤17<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">8<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤31<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">0.8<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤18<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">10<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤34<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">1.0<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤18<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">12<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤38<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">1.2<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤18<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">14<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤41<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">1.6<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤19<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">16<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤46<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">2.0<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤20<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">20<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤52<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">2.5<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤21<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">25<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤61<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">3<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤22<**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">单面加工至22.5<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤73<****><**** ****="margin:0px;padding:0px;width:161.85pt;background-color:****ansparent;">4<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;">≤23<**** ****="margin:0px;padding:0px;width:73.9pt;background-color:****ansparent;"> 

注:1如果测得的试样厚度算术平均值是介于表中两厚度之间,则其指标值应从内插法求得。2如果测得的厚度算术平均值小于0.4mm,则其指标值取≤17mg。如果标称厚度为25mm并测得的厚度算术平均值大于25mm时,则其指标值取≤61mg。标称厚度大于25mm的板材,则应从单面加工至22.5mm且加工面应是比较光滑的。
  环氧树脂板是由电工用无碱玻璃纤维布浸以环氧酚醛树脂,经烘焙、热压而成。
  环氧树脂板具有较高的机械和介电性能,较好的耐热性和耐潮性,并有良好的机械加工性,耐热等级为B级。
  环氧树脂板适用于电机、电器设备中作为绝缘结构零部件,并可在潮温环境和变压器油中使用。
  环氧树脂板以较高的机械性能和电气性能,广泛应用在发电机、马达、电子器具上作为绝缘材料和构件。在变压器油压环境和湿度环境中也非常适用。

7、环氧树脂和所用的固化剂的反应是通过直接加成反应或树脂分子中环氧基的开环聚合反应来进行的,没有水或其它挥发性副产物放出。它们和不饱和聚酯树脂、酚醛树脂相比,在固化过程中显示出很低的收缩性(小于2%)。

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