CN104086865A - 一种耐热电容器薄膜专用填料及其制备方法 - Google Patents

一种耐热电容器薄膜专用填料及其制备方法 Download PDF

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CN104086865A
CN104086865A CN201410308288.9A CN201410308288A CN104086865A CN 104086865 A CN104086865 A CN 104086865A CN 201410308288 A CN201410308288 A CN 201410308288A CN 104086865 A CN104086865 A CN 104086865A
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鲍启兵
褚诗泉
骆方旭
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Anhui Jiangwei Precision Manufacturing Co Ltd
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Abstract

一种耐热电容器薄膜专用填料,由下列重量份的原料制成：聚四氟乙烯微粉2-4、甲基丙烯酸锌4-6、甲基丙烯酸镁4-6、木质磺酸钙0.3-0.6、维纶纤维0.5-0.7、二茂铁2-3、氢氧化钠0.4-0.7、乙酰柠檬酸三丁酯0.2-0.3、重质碳酸钙3-4、钙-锌稳定剂2-3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20；本发明填料使用了聚四氟乙烯微粉、甲基丙烯酸锌、甲基丙烯酸镁，能够提高薄膜的耐热性、耐酸碱、绝缘性能；通过使用粘土，降低了成本；通过使用本发明助剂，能提高填料的分散性、补强性能，能提高薄膜的强度和耐冲击韧性。

Description

一种耐热电容器薄膜专用填料及其制备方法
技术领域
本发明属于电容器薄膜领域，特别涉及一种耐热电容器薄膜专用填料及其制备方法。
背景技术
薄膜电容器由于具有很多优良的特性，因此是一种性能优秀的电容器。它的主要等性如下：无极性，绝缘阻抗很高，频率特性优异(频率响应宽广)，而且介质损失很小。基于以上的优点，所以薄膜电容器被大量使用在模拟电路上。尤其是在信号交连的部份，必须使用频率特性良好，介质损失极低的电容器，方能确保信号在传送时，不致有太大的失真情形发生。
在所有的塑料薄膜电容当中，聚丙烯(PP)电容和聚苯乙烯(PS)电容的特性最为显著，所以近年来PP电容和PS电容被使用在音响器材的频率与数量也愈来愈高。单纯的聚丙烯(PP)薄膜虽然具有耐热、耐腐蚀，制品可用蒸汽消毒的突出优点，而且密度小，是最轻的通用塑料；但是其存在耐低温冲击性差，较易老化的缺点。聚苯乙烯(PS)薄膜具有极高的透明度，电绝缘性能好，易着色，加工流动性好，刚性好及耐化学腐蚀性好，但是比较脆，冲击强度低，易出现应力开裂，耐热性差及不耐沸水；因此需要对薄膜进行改性。而且随着电容器的应用范围逐渐增多，薄膜的性能也需要改善，比如耐热、耐低温、耐酸碱、耐腐蚀、强度、耐老化、耐紫外线、阻燃、耐磨、韧性、耐冲击等性能需要改善，可以通过添加填料改性来改善性能。
发明内容
本发明的目的在于提供一种耐热电容器薄膜专用填料及其制备方法，该填料能够提高薄膜的耐热性、耐酸碱、绝缘性能。
本发明的技术方案如下：
一种耐热电容器薄膜专用填料,其特征在于由下列重量份的原料制成：聚四氟乙烯微粉2-4、甲基丙烯酸锌4-6、甲基丙烯酸镁4-6、木质磺酸钙0.3-0.6、维纶纤维0.5-0.7、二茂铁2-3、氢氧化钠0.4-0.7、乙酰柠檬酸三丁酯0.2-0.3、重质碳酸钙3-4、钙-锌稳定剂2-3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20；
所述助剂由下述重量份的原料制成：膨润土2-3、2-2.5% 氢氧化钠溶液10-15、乙炔炭黑2-3、甲基丙烯酸酯1-2、丙烯酸乙酯0.4-0.7、碳酸钙粉10-15、十二烷基苯磺酸钠0.1-0.2、硼酸镁晶须1-1.3、纳米锌粉2-4、聚四氟乙烯微粉0.4-0.6、柴胡油0.5-0.8、过硫酸钾0.1-0.2、水适量；制备方法为：膨润土与2-2.5% 氢氧化钠溶液混合，加热至70-80℃，搅拌反应20-30分钟，过滤，得滤渣，水洗至pH为7-8，烘干粉碎成2-50μm的颗粒；再将十二烷基苯磺酸钠加入适量水中，再加入所述膨润土颗粒、碳酸钙粉，搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯，搅拌均匀后升温至70-80℃，加入过硫酸钾，搅拌反应20-30分钟，再加入乙炔炭黑、纳米锌粉，继续搅拌反应30-40分钟，烘干，与其他剩余成分混合，分散研磨成2-50μm的颗粒，即得。
所述的耐热电容器薄膜专用填料的制备方法，其特征在于包括以下步骤：
（1）将粘土送入煅烧炉中，在700-800℃下煅烧2-3个小时，取出粉碎，过100目筛，再加入2-3倍的4-6%盐酸，加热至50-70℃，搅拌10-20分钟，过滤，得滤渣，按上述方法再酸洗一次，再水洗至中性，过滤，得颗粒；
（2）将重质碳酸钙粉碎，过100目筛，与甲基丙烯酸锌、甲基丙烯酸镁、木质磺酸钙、氢氧化钠、乙酰柠檬酸三丁酯、钙-锌稳定剂混合，研磨20-30分钟，得混合物料；
（3）将第（1）步和第（2）步得到的物料与聚四氟乙烯微粉、维纶纤维、二茂铁、混合，加入适量水搅拌成泥状，研磨成2-50μm的浆料，喷雾干燥，再与其他剩余成分混合均匀，即得。
本发明的有益效果
本发明填料使用了聚四氟乙烯微粉、甲基丙烯酸锌、甲基丙烯酸镁，能够提高薄膜的耐热性、耐酸碱、绝缘性能；通过使用粘土，降低了成本；通过使用本发明助剂，能提高填料的分散性、补强性能，能提高薄膜的强度和耐冲击韧性。
具体实施方式
一种耐热电容器薄膜专用填料,由下列重量份(公斤)的原料制成：聚四氟乙烯微粉3、甲基丙烯酸锌5、甲基丙烯酸镁5、木质磺酸钙0.5、维纶纤维0.6、二茂铁2.5、氢氧化钠0.5、乙酰柠檬酸三丁酯0.3、重质碳酸钙3.5、钙-锌稳定剂2.5、粘土63、5%盐酸适量、水适量、助剂18；
所述助剂由下述重量份（公斤）的原料制成：膨润土2.5、2.3% 氢氧化钠溶液13、乙炔炭黑2.5、甲基丙烯酸酯1.5、丙烯酸乙酯0.6、碳酸钙粉13、十二烷基苯磺酸钠0.1、硼酸镁晶须1.2、纳米锌粉3、聚四氟乙烯微粉0.5、柴胡油0.6、过硫酸钾0.1、水适量；制备方法为：膨润土与2.3% 氢氧化钠溶液混合，加热至75℃，搅拌反应25分钟，过滤，得滤渣，水洗至pH为8，烘干粉碎成2-50μm的颗粒；再将十二烷基苯磺酸钠加入适量水中，再加入所述膨润土颗粒、碳酸钙粉，搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯，搅拌均匀后升温至75℃，加入过硫酸钾，搅拌反应25分钟，再加入乙炔炭黑、纳米锌粉，继续搅拌反应35分钟，烘干，与其他剩余成分混合，分散研磨成2-50μm的颗粒，即得。
所述的耐热电容器薄膜专用填料的制备方法，包括以下步骤：
（1）将粘土送入煅烧炉中，在750℃下煅烧2.5个小时，取出粉碎，过100目筛，再加入2.5倍的5%盐酸，加热至60℃，搅拌18分钟，过滤，得滤渣，按上述方法再酸洗一次，再水洗至中性，过滤，得颗粒；
（2）将重质碳酸钙粉碎，过100目筛，与甲基丙烯酸锌、甲基丙烯酸镁、木质磺酸钙、氢氧化钠、乙酰柠檬酸三丁酯、钙-锌稳定剂混合，研磨25分钟，得混合物料；
（3）将第（1）步和第（2）步得到的物料与聚四氟乙烯微粉、维纶纤维、二茂铁、混合，加入适量水搅拌成泥状，研磨成2-50μm的浆料，喷雾干燥，再与其他剩余成分混合均匀，即得。
实验数据：将本实施例的填料添加到聚丙烯电容器薄膜中，添加量为10-15%，薄膜厚度为2-50μm，薄膜击穿电压值≥ 0.60kV/μm（100℃）。

Claims (2)

1.一种耐热电容器薄膜专用填料,其特征在于由下列重量份的原料制成：聚四氟乙烯微粉2-4、甲基丙烯酸锌4-6、甲基丙烯酸镁4-6、木质磺酸钙0.3-0.6、维纶纤维0.5-0.7、二茂铁2-3、氢氧化钠0.4-0.7、乙酰柠檬酸三丁酯0.2-0.3、重质碳酸钙3-4、钙-锌稳定剂2-3、粘土60-65、4-6%盐酸适量、水适量、助剂15-20；
所述助剂由下述重量份的原料制成：膨润土2-3、2-2.5% 氢氧化钠溶液10-15、乙炔炭黑2-3、甲基丙烯酸酯1-2、丙烯酸乙酯0.4-0.7、碳酸钙粉10-15、十二烷基苯磺酸钠0.1-0.2、硼酸镁晶须1-1.3、纳米锌粉2-4、聚四氟乙烯微粉0.4-0.6、柴胡油0.5-0.8、过硫酸钾0.1-0.2、水适量；制备方法为：膨润土与2-2.5% 氢氧化钠溶液混合，加热至70-80℃，搅拌反应20-30分钟，过滤，得滤渣，水洗至pH为7-8，烘干粉碎成2-50μm的颗粒；再将十二烷基苯磺酸钠加入适量水中，再加入所述膨润土颗粒、碳酸钙粉，搅拌均匀后加入甲基丙烯酸酯、丙烯酸乙酯，搅拌均匀后升温至70-80℃，加入过硫酸钾，搅拌反应20-30分钟，再加入乙炔炭黑、纳米锌粉，继续搅拌反应30-40分钟，烘干，与其他剩余成分混合，分散研磨成2-50μm的颗粒，即得。
2.根据权利要求1所述的耐热电容器薄膜专用填料的制备方法，其特征在于包括以下步骤：
（1）将粘土送入煅烧炉中，在700-800℃下煅烧2-3个小时，取出粉碎，过100目筛，再加入2-3倍的4-6%盐酸，加热至50-70℃，搅拌10-20分钟，过滤，得滤渣，按上述方法再酸洗一次，再水洗至中性，过滤，得颗粒；
（2）将重质碳酸钙粉碎，过100目筛，与甲基丙烯酸锌、甲基丙烯酸镁、木质磺酸钙、氢氧化钠、乙酰柠檬酸三丁酯、钙-锌稳定剂混合，研磨20-30分钟，得混合物料；
（3）将第（1）步和第（2）步得到的物料与聚四氟乙烯微粉、维纶纤维、二茂铁、混合，加入适量水搅拌成泥状，研磨成2-50μm的浆料，喷雾干燥，再与其他剩余成分混合均匀，即得。
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