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%)。 |