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CN106543535A - 一种耐压抗老化的金属化薄膜电容器及其制备方法 - Google Patents

一种耐压抗老化的金属化薄膜电容器及其制备方法 Download PDF

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CN106543535A
CN106543535A CN201610944231.7A CN201610944231A CN106543535A CN 106543535 A CN106543535 A CN 106543535A CN 201610944231 A CN201610944231 A CN 201610944231A CN 106543535 A CN106543535 A CN 106543535A
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胡忠胜
华玲萍
吴良军
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Anhui Feida Electrical Technology Co Ltd
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Abstract

本发明属于电容器技术领域,具体涉及一种耐压抗老化的金属化薄膜电容器及其制备方法,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯,硅烷交联聚乙烯,丁腈橡胶,聚对苯二甲酸丁二醇酯,液态聚硫橡胶,亚甲基双丙烯酰胺,丙烯酸丁酯,玄武岩纤维粉,四氢噻吩,四氯化铱,对苯二酚,四甲基氢氧化铵,石脑油,硼酸三异丙酯,失水山梨醇脂肪酸酯。本发明相比现有技术具有以下优点:本发明塑料薄膜的拉伸性能较好,方阻较小,膜厚增加,增加了耐压,使金属层接触面积增大,损耗值稳定,提高到电流能力;提高其阻燃性能和抗氧化性能,使其在持续高温环境中使用具有较强的耐老化性,不产生污染物,长时间存储其性能保持良好。

Description

一种耐压抗老化的金属化薄膜电容器及其制备方法
技术领域
本发明属于电容器技术领域,具体涉及一种耐压抗老化的金属化薄膜电容器及其制备方法。
背景技术
电容器用双向拉伸聚丙烯薄膜具有较高的机械性能和电气性能,与普通型薄膜制得的电容器相比,用聚丙烯薄膜制得的电容器以其热收缩率低、性能稳定、耐高温、耐高压,防止击穿等显著优点。薄膜电容器是以金属箔当电极,将其和聚乙酯、聚丙烯、聚苯乙烯或聚碳酸酯等塑料薄膜,从两端重叠后,卷绕成圆筒状的构造成电容器,在所有的塑料薄膜电容器当中,聚丙烯电容和聚苯乙烯电容的特性最为显著,同时,这两种电容器的价格也相对较高,电容器的薄膜质量直接影响电容器的使用寿命和产品性能,电容器薄膜的需求量大,种类多,采用单一原料生产的薄膜难以适应市场需求,薄膜电容根据用途可分为:高比能储能电容器、抗电磁干扰电容器、抗辐射电容器、安全膜电容器、长寿命电容器、高可靠电容器、高压全膜电容器等,随着电子整列级向数字化、高频化、多功能化以及向薄、轻、小、便携等方向发展,电容器不可避免的要向体积小、性能优、价格更低的方向发展,随着电容器工作环境的多样化,对其抗压性和耐老化性能都提出了更高的要求。
发明内容
本发明的目的是针对现有的问题,提供了一种耐压抗老化的金属化薄膜电容器及其制备方法。
本发明是通过以下技术方案实现的:一种耐压抗老化的金属化薄膜电容器,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯100-110,硅烷交联聚乙烯15-20,丁腈橡胶8-12,聚对苯二甲酸丁二醇酯3-7,液态聚硫橡胶6-10,亚甲基双丙烯酰胺3-4,丙烯酸丁酯1-3,玄武岩纤维粉7-12,四氢噻吩1-2,四氯化铱2-4,对苯二酚2-3,四甲基氢氧化铵0.02-0.04,石脑油1-2,硼酸三异丙酯3-5,失水山梨醇脂肪酸酯2-4。
一种耐压抗老化的金属化薄膜电容器的制备方法,包括以下步骤:
(1)将茂金属聚乙烯、硅烷交联聚乙烯、丁腈橡胶、四氢噻吩、四甲基氢氧化铵、硼酸三异丙酯送入捏合机中,在温度为100-120℃的环境下热处理2-3小时,得到混合物料;
(2)在上述混合物料中加入聚对苯二甲酸丁二醇酯、液态聚硫橡胶、亚甲基双丙烯酰胺、丙烯酸丁酯、玄武岩纤维粉,在温度为160-180℃的环境下热处理5-6小时,然后加入剩余原料,充分搅拌均匀后送入挤出机熔融、过滤,得片状熔体;
(3)将上述所得片状熔体冷却定型后,依次通过纵向拉伸,横向拉伸,粗化面电晕处理,收卷后,两次时效处理;
(4)真空蒸镀金属化膜,粗化面形成金属化层,在其两端喷锌铝合金层,在其表面再喷涂锌层,然后对其进行热处理,对其进行焊接再浸渍或插入外壳,形成金属化薄膜电容器成品。
作为对上述方案的进一步改进,步骤(2)中所述挤出机的挤出温度为270-285℃,过滤为1600-1800目。
作为对上述方案的进一步改进,步骤(3)中所述粗化面电晕处理的工艺条件为25-40J/cm²。
作为对上述方案的进一步改进,步骤(4)中锌铝合金层的厚度为0.08-0.12mm,锌层的厚度为0.35-0.42mm。
作为对上述方案的进一步改进,所述金属化薄膜的厚度为5-12μm。
本发明相比现有技术具有以下优点:本发明中茂金属聚乙烯、硅烷交联聚乙烯、四氢噻吩、硼酸三异丙酯在高温条件下发生交联反应,提高塑料薄膜的拉伸性能,方阻较小,膜厚增加,增加了耐压,使金属层接触面积增大,损耗值稳定,提高到电流能力;液态聚硫橡胶、玄武岩纤维粉与其他原料相配合作用,改善塑料薄膜的界面状态,提高其阻燃性能和抗氧化性能,使其在持续高温环境中使用具有较强的耐老化性,不产生污染物,长时间存储其性能保持良好。
具体实施方式
实施例1
一种耐压抗老化的金属化薄膜电容器,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯100,硅烷交联聚乙烯20,丁腈橡胶10,聚对苯二甲酸丁二醇酯6,液态聚硫橡胶8,亚甲基双丙烯酰胺3,丙烯酸丁酯2,玄武岩纤维粉10,四氢噻吩1,四氯化铱4,对苯二酚3,四甲基氢氧化铵0.03,石脑油2,硼酸三异丙酯3,失水山梨醇脂肪酸酯3。
一种耐压抗老化的金属化薄膜电容器的制备方法,包括以下步骤:
(1)将茂金属聚乙烯、硅烷交联聚乙烯、丁腈橡胶、四氢噻吩、四甲基氢氧化铵、硼酸三异丙酯送入捏合机中,在温度为100-120℃的环境下热处理2-3小时,得到混合物料;
(2)在上述混合物料中加入聚对苯二甲酸丁二醇酯、液态聚硫橡胶、亚甲基双丙烯酰胺、丙烯酸丁酯、玄武岩纤维粉,在温度为160-180℃的环境下热处理5-6小时,然后加入剩余原料,充分搅拌均匀后送入挤出机熔融、过滤,得片状熔体;
(3)将上述所得片状熔体冷却定型后,依次通过纵向拉伸,横向拉伸,粗化面电晕处理,收卷后,两次时效处理;
(4)真空蒸镀金属化膜,粗化面形成金属化层,在其两端喷锌铝合金层,在其表面再喷涂锌层,然后对其进行热处理,对其进行焊接再浸渍或插入外壳,形成金属化薄膜电容器成品。
其中,步骤(2)中所述挤出机的挤出温度为270-285℃,过滤为1600-1800目;步骤(3)中所述粗化面电晕处理的工艺条件为25-40J/cm²;步骤(4)中锌铝合金层的厚度为0.08-0.12mm,锌层的厚度为0.35-0.42mm。
其中,所述金属化薄膜的厚度为5-12μm。
所得金属化薄膜电容器耐压范围可达900-1200Vdc,无畸形,介质损耗小,介质损耗角正切≤0.002,横向收缩率≤0.28%,纵向收缩率≤2.5%,横向拉伸强度≥16.5Mpa,纵向拉伸强度≥118Mpa,在120℃下长期工作,使用寿命可达220000h以上。
实施例2
一种耐压抗老化的金属化薄膜电容器,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯105,硅烷交联聚乙烯18,丁腈橡胶8,聚对苯二甲酸丁二醇酯7,液态聚硫橡胶6,亚甲基双丙烯酰胺4,丙烯酸丁酯3,玄武岩纤维粉12,四氢噻吩2,四氯化铱4,对苯二酚3,四甲基氢氧化铵0.02,石脑油2,硼酸三异丙酯5,失水山梨醇脂肪酸酯3。
除以上原料成分外与实施例1相同。
所得金属化薄膜电容器耐压范围可达900-1200Vdc,无畸形,介质损耗小,介质损耗角正切≤0.002,横向收缩率≤0.25%,纵向收缩率≤2.3%,横向拉伸强度≥16.8Mpa,纵向拉伸强度≥116Mpa,在120℃下长期工作,使用寿命可达220000h以上。
实施例3
一种耐压抗老化的金属化薄膜电容器,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯110,硅烷交联聚乙烯20,丁腈橡胶12,聚对苯二甲酸丁二醇酯3,液态聚硫橡胶8,亚甲基双丙烯酰胺4,丙烯酸丁酯2,玄武岩纤维粉7,四氢噻吩2,四氯化铱4,对苯二酚3,四甲基氢氧化铵0.04,石脑油2,硼酸三异丙酯5,失水山梨醇脂肪酸酯3。
除以上原料成分外与实施例1相同。
所得金属化薄膜电容器耐压范围可达900-1200Vdc,无畸形,介质损耗小,介质损耗角正切≤0.002,横向收缩率≤0.29%,纵向收缩率≤2.2%,横向拉伸强度≥16.7Mpa,纵向拉伸强度≥115Mpa,在120℃下长期工作,使用寿命可达220000h以上。

Claims (6)

1.一种耐压抗老化的金属化薄膜电容器,其特征在于,其塑料薄膜由以下重量份的原料制成:茂金属聚乙烯100-110,硅烷交联聚乙烯15-20,丁腈橡胶8-12,聚对苯二甲酸丁二醇酯3-7,液态聚硫橡胶6-10,亚甲基双丙烯酰胺3-4,丙烯酸丁酯1-3,玄武岩纤维粉7-12,四氢噻吩1-2,四氯化铱2-4,对苯二酚2-3,四甲基氢氧化铵0.02-0.04,石脑油1-2,硼酸三异丙酯3-5,失水山梨醇脂肪酸酯2-4。
2.一种如权利要求1所述耐压抗老化的金属化薄膜电容器的制备方法,其特征在于,包括以下步骤:
(1)将茂金属聚乙烯、硅烷交联聚乙烯、丁腈橡胶、四氢噻吩、四甲基氢氧化铵、硼酸三异丙酯送入捏合机中,在温度为100-120℃的环境下热处理2-3小时,得到混合物料;
(2)在上述混合物料中加入聚对苯二甲酸丁二醇酯、液态聚硫橡胶、亚甲基双丙烯酰胺、丙烯酸丁酯、玄武岩纤维粉,在温度为160-180℃的环境下热处理5-6小时,然后加入剩余原料,充分搅拌均匀后送入挤出机熔融、过滤,得片状熔体;
(3)将上述所得片状熔体冷却定型后,依次通过纵向拉伸,横向拉伸,粗化面电晕处理,收卷后,两次时效处理;
(4)真空蒸镀金属化膜,粗化面形成金属化层,在其两端喷锌铝合金层,在其表面再喷涂锌层,然后对其进行热处理,对其进行焊接再浸渍或插入外壳,形成金属化薄膜电容器成品。
3.如权利要求2所述一种耐压抗老化的金属化薄膜电容器的制备方法,其特征在于,步骤(2)中所述挤出机的挤出温度为270-285℃,过滤为1600-1800目。
4.如权利要求3所述一种耐压抗老化的金属化薄膜电容器的制备方法,其特征在于,步骤(3)中所述粗化面电晕处理的工艺条件为25-40J/cm²。
5.如权利要求4所述一种耐压抗老化的金属化薄膜电容器的制备方法,其特征在于,步骤(4)中锌铝合金层的厚度为0.08-0.12mm,锌层的厚度为0.35-0.42mm。
6.如权利要求2-5中任意一项所述一种耐压抗老化的金属化薄膜电容器的制备方法,其特征在于,所述金属化薄膜的厚度为5-12μm。
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