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;">MΩ <**** ****="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;">MΩ <**** ****="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%）。