CN101308730B - 铝电解电容器元件卷绕固定用带及铝电解电容器 - Google Patents
铝电解电容器元件卷绕固定用带及铝电解电容器 Download PDFInfo
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- CN101308730B CN101308730B CN2008100945424A CN200810094542A CN101308730B CN 101308730 B CN101308730 B CN 101308730B CN 2008100945424 A CN2008100945424 A CN 2008100945424A CN 200810094542 A CN200810094542 A CN 200810094542A CN 101308730 B CN101308730 B CN 101308730B
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- electrolytic capacitor
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- aluminum electrolytic
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Abstract
本发明提供一种铝电解电容器卷绕固定用粘合带以及使用其的铝电解电容器,该带在用于铝电解电容器的情况下,在缠绕该带时不发生断带,不降低编带操作性,可防止卷完后电容器不必要地变得过大的不良现象。铝电解电容器元件卷绕固定用带,其特征在于,该铝电解电容器元件卷绕固定用带在支撑基材的单面具有粘接剂层,其中,前述支撑基材具有至少一层混抄纸的层,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,前述支撑基材的密度大于0.9g/cm3,前述支撑基材的厚度为15~50μm。
Description
技术领域
本发明涉及由支撑基材和粘接剂层构成的铝电解电容器元件卷绕固定用带及使用前述带的铝电解电容器。
背景技术
一直以来,粘接剂或粘合带被应用于铝电解电容器的元件卷绕固定中,可易于实施机械化等的粘合带方式成为主流。在该铝电解电容器用粘合带中,提出了将马尼拉麻纸、牛皮纸、合成纤维等用于支撑基材的铝电解电容器用末端固定粘合带(专利文献1和2)。
可是,将这些应用于铝电解电容器的元件卷绕固定的情况下,因为支撑基材的基底是纸,所以强度相对不足,例如,将50μm以下的纸用作支撑基材的薄型的粘合带,其在用卷绕机贴附于电容器时会发生断带,为了避免断带,有必要降低操作速度(编带操作性)等,成为操作性降低的原因。另外,元件卷绕固定带的宽度在5mm以下的小型电容器的情况下,操作性的降低尤为显著。
另外,如果将纸的厚度增厚、例如使用超过50μm的情况下,因为带强度相对变强,所以,可以避免编带操作性的降低,但卷完后的电容器直径不必要地变得过大,难以适用于小型电容器中。
专利文献1:日本特公昭62-62454号公报
专利文献2:日本特公昭62-62455号公报
发明内容
发明要解决的问题
因此,本发明鉴于上述事实,其目的在于,提供一种铝电解电容器卷绕固定用粘合带以及使用其的铝电解电容器,该带在用于铝电解电容器的情况下,在缠绕该带时不发生断带,由此,不降低编带操作性,可防止卷完后电容器不必要地变得过大的不良现象。
解决问题的方法
本发明人为了达成前述目的而进行了深入研究,结果发现,通过使用下述铝电解电容器件元件卷绕固定用带,可达成上述目的,并完成了本发明。
即,本发明的铝电解电容器元件卷绕固定用带,其特征在于,该铝电解电容器元件卷绕固定用带在支撑基材的单面具有粘接剂层,其中,前述支撑基材具有至少一层混抄纸的层,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,前述支撑基材的密度大于0.9g/cm3,前述支撑基材的厚度为15~50μm。
本发明的铝电解电容器元件卷绕固定用带,其特征在于,该铝电解电容器元件卷绕固定用带在支撑基材的单面具有粘接剂层,其中,前述支撑基材具有层压混抄纸而成的2层以上的多重层,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,前述多重层中至少一层的密度大于0.9g/cm3、前述基材的厚度为15~50μm。
本发明的铝电解电容器元件卷绕固定用带,其特征在于,至少前述多重层的与粘接剂层相反的一侧的最外层的密度大于0.9g/cm3。
本发明的铝电解电容器,其特征在于,使用本发明的铝电解电容器元件卷绕固定用带制成。
发明的效果
本发明的铝电解电容器元件卷绕固定用带,作为支撑基材,具有至少一层混抄纸的层,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,支撑基材的密度大于0.9g/cm3,支撑基材的厚度为15~50μm,从而可提供一种铝电解电容器,其中,该带在缠绕时不发生断带,由此不降低编带操作性,可防止卷完后电容器不必要地变大的不良现象,是有效的。
附图说明
图1是表示本发明的粘合带的一例的示意图。
图2是表示本发明的粘合带的一例的示意图。
符号说明
1 支撑基材
1-1 支撑基材
1-2 支撑基材(最外层)
2 粘接剂层
3 铝电解电容器元件卷绕固定用带
具体实施方式
本发明的铝电解电容器卷绕固定用粘合带由支撑基材和粘接剂层构成。以下具体说明。
作为本发明所使用的支撑基材,其由至少一层混抄纸的层构成,其中,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,通过使用前述纸,可确保电解电容器的耐热性、电解液保持性。
另外,作为本发明所使用的支撑基材,其由层压混抄纸而成的2层以上的多重层构成,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,通过制成层压前述纸而成的2层以上的多重层来使用,与上述同样,可确保电解电容器的耐热性、电解液保持性。
关于支撑基材的密度,在支撑基材具有至少一层由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成的混抄纸的层的情况下,支撑基材的密度大于0.9g/cm3。前述纸的密度在0.9g/cm3以下时,有可能不能确保作为铝电解电容器元件卷绕固定用的强度。
另外,关于支撑基材的密度,在将由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成的混抄纸层压而成的2层以上的多重层的情况下,多重层的至少一层的密度大于0.9g/cm3、优选多重层的与粘接剂层相反的一侧的最外层的密度大于0.9g/cm3,前述纸的密度在0.9g/cm3以下时,有可能不能确保作为铝电解电容器元件卷绕固定用的强度。
在此,说明上述密度(g/cm3)的测定方法。首先,在支撑基材上,取出大小约1m×1m、或者额定尺寸的试验片,测定前述试验片的长宽及厚度后,测量重量。由该重量和水分(%)依据下式计算出密度。另外,前述水分是指:将刚用抄纸机抄过之后的卷立即用电阻式水分计测定;或者,用干燥法测定的情况下,取约2g试验片放入称量瓶,测定其重量,105±3℃×1小时以上干燥,然后,在干燥器内约冷却至大致常温、成为恒量后,求出其减少量,将相对原来的重量的百分率作为水分。
密度(g/cm3)=[测定重量(g)×(1-水分(%))/100]/[长尺寸(m)×宽尺寸(m)×厚度(m)]
支撑基材的厚度为15~50μm,优选20~40μm。支撑基材的厚度超过50μm时,卷完后的电容器直径变大,不能适用于小型电容器。另一方面,不足15μm时,支撑基材的强度过低,损害实用性。另外,支撑基材形成多重层的情况下,多重层的与粘接剂层相反的一侧的最外层的厚度优选10μm以上,更优选15~30μm。不足10μm时,不能确保作为铝电解电容器元件卷绕固定用带所期望的支撑基材的强度。
本发明的粘合带的粘接剂层只要具有粘合性则其材质、构成等没有特别的限定,可以是通常使用的粘接剂,例如,可使用丙烯酸系粘接剂、橡胶系粘接剂、硅酮树脂系粘接剂等常用的压敏粘接剂。在这些当中,优选使用丙烯酸系粘接剂。
作为丙烯酸系粘接剂,可使用赋予粘合性的低玻璃化转变温度(Tg)的丙烯酸系单体作为主单体。另外,还可使用:赋予粘合性、凝聚力的高Tg的共聚单体;用于改善交联性和粘合性的含官能团单体、即单烯属不饱和单体等。
作为前述主单体,可列举将如下1种或2种以上(甲基)丙烯酸烷基酯作为单体成分使用的丙烯酸系聚合物等,该(甲基)丙烯酸烷基酯例如为(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丁酯、(甲基)丙烯酸异戊酯、(甲基)丙烯酸正己酯、(甲基)丙烯酸2-乙基己酯、(甲基)丙烯酸异辛酯、(甲基)丙烯酸异壬酯、(甲基)丙烯酸癸酯、(甲基)丙烯酸十二酯等。前述丙烯酸系粘接剂的耐热性比较高,是本发明最适合的粘接剂。
作为前述共聚单体,可列举例如,醋酸乙烯、丙酸乙烯、乙烯基醚、苯乙烯、丙烯腈、甲基丙烯腈等含有乙烯基的化合物。
作为前述含官能团单体,可列举例如,丙烯酸、甲基丙烯酸、衣康酸、马来酸、富马酸、巴豆酸等含羧基单体;(甲基)丙烯酸2-羟乙酯、(甲基)丙烯酸2-羟丙酯、(甲基)丙烯酸4-羟丁酯、N-羟甲基丙烯酰胺、烯丙醇等含羟基单体;二甲基氨基乙基(甲基)丙烯酸酯、二乙基氨基乙基(甲基)丙烯酸酯、二甲基氨基丙基(甲基)丙烯酸酯等含叔氨基单体;丙烯酰胺、甲基丙烯酰胺等含酰胺基单体;N-甲基(甲基)丙烯酰胺、N-乙基(甲基)丙烯酰胺、N-甲氧基甲基(甲基)丙烯酰胺、N-乙氧基甲基(甲基)丙烯酰胺、N-叔丁基(甲基)丙烯酰胺、N-辛基(甲基)丙烯酰胺等含N-取代酰胺基单体;甲基丙烯酸缩水甘油酯等含环氧基单体等。这些可共聚合的单体成分可使用1种或2种以上。这些可共聚合单体的使用量为全部单体成分的70重量%以下、更优选为40重量%以下。
前述丙烯酸系聚合物是将单一单体或者2种以上单体的混合物加以聚合而得到。聚合可采用溶液聚合、乳液聚合、本体聚合、悬浮聚合等任一方式。丙烯酸系聚合物的重均分子量(Mw)优选为50万~150万、更优选为80万~120万。重均分子量(Mw)和数均分子量(Mn)的分散度(Mw/Mn)优选为6~10。
重均分子量是用GPC法通过标准聚苯乙烯换算的值。作为GPC本体,使用Tosoh公司制的HLC-8120GPC、柱温40℃、泵流量0.5ml/min、使用检测器RI的数据处理是使用分子量事先已知的标准聚苯乙烯的标准曲线(在分子量500~2060万的检测)、通过分子量换算求得分子量。
使用柱:TSKgel GMH-H(S)×2根(Tosoh公司制)
流动相:四氢呋喃
注入量:100μl
样品浓度:1.0g/l(四氢呋喃溶液)
分散度由重均分子量与数均分子量之比算出。用相同方法实施数均分子量的测定和重均分子量的测定。
前述丙烯酸系粘接剂可适宜含有交联剂。可列举例如,异氰酸酯系交联剂、环氧交联剂、氮丙啶系交联剂、螯合剂系交联剂等。
交联剂的使用量没有特别的限制,例如相对于前述丙烯酸系聚合物100重量份,优选0.1~15重量份,更优选1~10重量份。不足0.1重量份时,粘接剂的凝聚力不足,超过15重量份时,成为粘接剂的交联过多导致粘合力不足等的原因。
前述粘接剂除前述成分外,可根据需要使用目前已知的各种引发剂、赋粘剂、防老剂、填充剂、着色剂、链转移剂、增塑剂等添加剂。
用于调制前述粘接剂层的溶剂没有特别的限制,通常使用有机溶剂。在成膜时涂膜稳定性的方面,可均匀溶解粘接剂组合物的有机溶剂是好的。作为有机溶剂,可列举例如,丁烷、己烷、庚烷、甲苯、邻二甲苯、间二甲苯、对二甲苯、环己烷、甲醇、乙醇、异丙醇、1-戊醇、环己醇、2-甲基环己醇、二乙基醚、异丙基醚、二丁基醚、二苄基醚、四氢呋喃、丙酮、甲乙酮、甲基异丁基酮、2-庚酮(甲基戊基酮)、二异丁基酮、环己酮、甲基环己酮、环戊酮、醋酸戊酯、醋酸甲酯、醋酸乙酯、醋酸丙酯、醋酸丁酯、N,N-二甲基甲酰胺(DMF)、N,N-二甲基乙酰胺(DMAc)、N-甲基吡咯烷酮、2-甲氧基乙醇、2-乙氧基乙醇、2-丁氧基乙醇等。作为前述有机溶剂,优选醋酸乙酯、甲苯、二甲苯等。根据溶剂,粘接剂组合物通常被调制成固体成分浓度为5~50重量%、优选为5~30重量%、更优选为10~25重量%的溶液。
所形成的粘接剂层的厚度没有特别的限定,可是通常优选2~100μm左右、更优选5~40μm左右、最优选为10~30μm。不足2μm时,会产生作为元件卷绕固定用带的卷绕固定性降低的情况。另一方面,超过100μm时,变得过厚、产生难以操作的情况。
本发明的粘接剂层的形成方法是将粘接剂组合物涂布在支撑基材上而形成粘接剂组合物层。作为该形成方法,可采用各种方法。例如,在粘接剂组合物层的形成中使用连续涂布装置的情况下,可列举例如如下方法:连续供给粘接剂组合物(溶液),通过安装于装置前端的模等喷出单元在薄板基材上连续挤出成薄层的方法。另外,作为形成粘接剂组合物层的方法,采用间歇方式的情况下,可列举如下方法:在支撑基材上,将粘接剂组合物(溶液)流延到基材上,用敷料器、丝棒、刮刀涂布机成形的方法。像这样,将薄层化的粘接剂组合物层压到支撑基材上后,加热,除去溶剂。
本发明的粘接剂层优选在贴附到不锈钢板(JIS Z0237)上的状态下,在剥离角度90°、拉伸速度50mm/min下的粘合力为3.0N/20mm以上,更优选3.5N/20mm以上。这种情况下,本发明的粘合带可维持作为元件卷绕固定用带所必需的粘合力。
下面是关于本发明的铝电解电容器的说明,该铝电解电容器如下构成:电容器元件,其将阳极箔和阴极箔夹着隔板缠绕而成;端子,其分别从阳极、阴极箔引出;密封这些的封口材料;和外壳。在此,作为电容器元件的卷绕固定用带,使用前述铝电解电容器元件卷绕固定用带。通过使用这种带,可得到如下的铝电解电容器,其中,在缠绕该带时不发生断带,由此其不降低编带操作性,不发生卷完后电容器不必要地变得过大的不良现象。
实施例
以下基于实施例说明本发明,可是本发明并不限定于这些。另外,以下,份是指重量份。
实施例1
作为支撑基材,使用密度为0.9g/cm3、厚20μm的单层牛皮纸(日本高度纸工业制)。
粘接剂层用以下的方法调制。首先,调制作为基础聚合物的丙烯酸系聚合物,其由100份丙烯酸正丁酯和5份丙烯酸构成的单体混合液得到。相对于100份该丙烯酸系聚合物,添加2份异氰酸酯系交联剂(商品名:CORONATE L、日本聚氨酯制)、500份作为溶剂的甲苯,调制丙烯酸系粘接剂溶液。将该丙烯酸系粘接剂溶液涂布到支撑基材上,使其干燥,制作粘接剂层,使得粘接剂层,厚度为20μm。
实施例2
作为支撑基材,使用由密度为0.95g/cm3、厚15μm的单层牛皮纸(日本高度纸工业制)和密度为0.75g/cm3、厚15μm的单层牛皮纸(日本高度纸工业制)构成的二层牛皮纸(日本高度纸工业制)。
粘接剂层用以下的方法调制。首先,调制作为基础聚合物的丙烯酸系聚合物,其由70份丙烯酸正丁酯、25份丙烯酸2-乙基己酯和5份丙烯酸构成的单体混合液得到。相对于100份该丙烯酸系聚合物,添加2份异氰酸酯系交联剂(商品名:CORONATE L、日本聚氨酯制)、500份作为溶剂的甲苯,调制丙烯酸系粘接剂溶液。将该丙烯酸系粘接剂溶液涂布到支撑基材上,使其干燥,调制粘接剂层,使得粘接剂层厚度为20μm。
比较例1
在实施例1中,使用密度为0.75g/cm3、厚20μm的单层牛皮纸(日本高度纸工业制)作为支撑基材,除此以外,与实施例1同样,制作出粘合带。
比较例2
在实施例2中,使用由密度为0.85g/cm3、厚度为15μm的单层牛皮纸(日本高度纸工业制)和密度为0.75g/cm3、厚度为15μm的单层牛皮纸(日本高度纸工业制)构成的二层牛皮纸(日本高度纸工业制)作为支撑基材,除此以外,与实施例1同样,制作出粘合带。
以下示出实施例和比较例中得到的粘合带的评价方法和评价结果。
编带操作性的评价
将粘合带切断加工成宽2.5mm的磁带状,在假想为电容器卷绕机的带重绕机中,确认以50m/分钟的速度运行的情况下的粘合带的运行情况。
表1
评价结果 | 实施例1 | 实施例2 | 比较例1 | 比较例2 |
编带操作性 | 良好 | 良好 | 发生断带 | 发生断带 |
即便在将本发明的粘合带用于铝电解电容器元件卷绕固定用途的情况下,也可确认该带在缠绕时不发生断带,不降低编带操作性,可防止卷完后的电容器不必要地变得过大的不良现象。另一方面,可确认比较例在带缠绕时发生断带、编带操作性降低。
Claims (3)
1.铝电解电容器元件卷绕固定用带,其特征在于,该铝电解电容器元件卷绕固定用带在支撑基材的单面具有粘接剂层,其中,
前述支撑基材具有层压混抄纸而成的2层以上的多重层,该混抄纸由马尼拉麻纸、牛皮纸、合成纤维纸或者两种以上这些纸构成,
前述多重层中至少一层的密度大于0.9g/cm3,
前述支撑基材的厚度为15~50μm。
2.根据权利要求1所述的铝电解电容器元件卷绕固定用带,其特征在于,至少前述多重层的与粘接剂层相反的一侧的最外层的密度大于0.9g/cm3。
3.铝电解电容器,其使用权利要求1或2所述的铝电解电容器元件卷绕固定用带制成。
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JP2007127980A JP5179779B2 (ja) | 2007-05-14 | 2007-05-14 | アルミ電解コンデンサ素子巻き止め用テープ及びアルミ電解コンデンサ |
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CN102634291A (zh) * | 2011-02-15 | 2012-08-15 | 日东电工株式会社 | 粘合带 |
CN102226978B (zh) * | 2011-03-31 | 2012-12-19 | 肇庆绿宝石电子有限公司 | 抗雷击导针型安规铝电解电容器及其生产方法 |
KR102624764B1 (ko) * | 2015-12-10 | 2024-01-15 | 주식회사 테이팩스 | 권취형 알루미늄 전해 콘덴서용 아크릴 점착 테이프 |
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FR1359596A (fr) * | 1963-06-20 | 1964-04-24 | Thomson Houston Comp Francaise | Condensateurs électriques et leur méthode de fabrication |
JPS5410962A (en) * | 1977-06-27 | 1979-01-26 | Tokyo Shibaura Electric Co | Power filter capacitor |
JPS5922316A (ja) * | 1982-07-29 | 1984-02-04 | エルナ−株式会社 | 電解コンデンサ |
JPS5922317A (ja) * | 1982-07-29 | 1984-02-04 | エルナ−株式会社 | 電解コンデンサ |
JPH0379417U (zh) * | 1989-11-30 | 1991-08-13 | ||
JPH04130426U (ja) * | 1991-05-16 | 1992-11-30 | 日東電工株式会社 | 電子部品用粘着テ−プ又はシ−ト |
JP3693299B2 (ja) * | 1992-11-27 | 2005-09-07 | ニッポン高度紙工業株式会社 | 電解コンデンサ |
JPH07150120A (ja) * | 1993-12-01 | 1995-06-13 | Nitto Denko Corp | 複合粘着テープ又はシート |
JPH10121011A (ja) * | 1996-10-16 | 1998-05-12 | Oji Paper Co Ltd | 粘着テープ |
JPH10168410A (ja) * | 1996-12-17 | 1998-06-23 | Nitto Denko Corp | 電解コンデンサ素子巻止め用粘着テープ |
JP2000186258A (ja) * | 1998-12-22 | 2000-07-04 | Sekisui Chem Co Ltd | クラフト紙粘着テープの製造方法 |
JP3675683B2 (ja) * | 1999-10-08 | 2005-07-27 | エルナー株式会社 | 電気二重層コンデンサ |
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