CN111276645A - 一种锂电池铝塑膜胶粘剂的填料增强体系设计方法 - Google Patents
一种锂电池铝塑膜胶粘剂的填料增强体系设计方法 Download PDFInfo
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Abstract
本发明提供一种锂电池铝塑膜胶粘剂的填料增强体系设计方法，所述的胶粘剂为烯烃类聚合物，加入碳酸钙、硫酸钡、玻纤等填料，增强胶粘剂的强度和韧性。配套固化剂可以采用异氰酸酯固化剂、环氧树脂、催化剂一种或多种共混。
Description
技术领域
本发明涉及锂电池软包装技术领域，特别是锂电池胶粘剂的填料增强体系设计方法。更具体说，设计烯烃聚合物为主剂，加入不同粒径的填料进行搭配，增加复合膜的强度和韧性。
背景技术
锂离子电池软包装已经在锂电领域应用越来越广泛，其通过复合而成，从外到内依次为尼龙、外层胶、铝箔、内层胶、cpp；其中内层胶对铝塑膜的耐腐蚀起到决定性的作用，一旦内层胶出现腐蚀，会造成cpp与铝箔层分离，造成锂电池胀气、漏液等问题。
目前粘结cpp和铝箔的胶水主要采用树脂加入固化剂进行使用。普遍认为加入填充料会影响剥离强度，同时加大了胶粘剂树脂中的缝隙，进而使性能下降。
本发明人通过填料的设计，利用填料之间的粒径大小，充分填充，通过实验得出填料的设计会增大强度和韧性；可对铝塑膜的性能有进一步提升。
发明内容
发明所解决的问题
目前锂电池铝塑膜粘结cpp和金属的胶水在粘结效果和效率上存在一定的不足，粘结性和耐腐蚀性有待提高，尤其在要求更高的动力电池铝塑膜领域。
本发明人进行深入研究，设计出本填料增强体系，可以进一步提升铝塑膜性能。
用于解决问题的方法
为解决上述问题，本发明人进行以下的填料增强体系设计。
本发明人通过填料的设计，利用填料之间的粒径大小，充分填充，通过实验得出填料的设计会增大强度和韧性；可对铝塑膜的性能有进一步提升。
胶粘剂主剂的特征在于所述主体聚合物由改性氯化聚丙烯、改性氯化聚乙烯、改性聚丙烯、改性聚乙烯、改性乙烯丙烯酸共聚物、改性苯乙烯、改性POE、改性EVA、改性环烯烃、改性聚丁烯、改性聚戊烯中的一种或多种。同时添加部分部分填料，增大强度和韧性。
配套固化剂可以采用异氰酸酯固化剂、环氧树脂、催化剂一种或多种共混。
粘合剂用于锂电池铝塑膜中金属与cpp之间的粘结。本填料增强体系设计方法可以有更高的粘结强度。
具体实施方法
下文中，对于本发明的实施方式进行详细说明。
主剂
本发明中使用的主剂的特征在于所述主体聚合物由改性氯化聚丙烯、改性氯化聚乙烯、改性聚丙烯、改性聚乙烯、改性乙烯丙烯酸共聚物、改性苯乙烯、改性POE、改性EVA、改性环烯烃、改性聚丁烯、改性聚戊烯中的一种或多种。
没有特别限制，可以采用公知的熔融法、溶液法、辐射法中的任何一种方法制得。主剂可以选择日本东洋纺、日本制纸、三井化学、成都科成精化科技有限公司的市售产品，但亦不限于此。
填料
在主剂中加入填充料，增加复合膜的强度和韧性。
填料在胶粘剂中起到骨架、填充作用，增加强度和韧性。
填料包括碳酸钙、硫酸钡、玻纤、滑石粉、高岭土、二氧化硅、云母粉、硅灰石、二氧化钛中的一种或几种，但不仅限于此。
填料的尺寸大小从1纳米-10000纳米之间，同时进行大小尺寸的协同补充，起到骨架填充作用。
填料加量针对主剂固含的量，在0.1%-100%。
固化剂
配套固化剂可以采用异氰酸酯固化剂、环氧树脂、催化剂一种或多种共混。
制造例1
东洋纺的PMA-KE100份作为主剂，填料为碳酸钙粉末，加量为10份，粒径选择1纳米到10000纳米之间进行搭配使用，E-51作为固化剂。使用前将主剂、固化剂混合均匀，进行涂布复合，而后继续进行测试剥离强度。
制造例2
将东洋纺的PMA-KE换成成都科成精化科技有限公司的LN-1212，其他与制造例1相同。
制造例3
将填料换成硫酸钡，其他与制造例2相同。
制造例4
将填料换成玻纤，其他与制造例2相同。
制造例5
将填料换成滑石粉，其他与制造例2相同。
制造例6
将填料换成高岭土，其他与制造例2相同。
制造例7
将填料换成二氧化硅，其他与制造例2相同。
制造例8
将填料换成云母粉，其他与制造例2相同。
制造例9
将填料换成硅灰石，其他与制造例2相同。
制造例10
将填料换成二氧化钛，其他与制造例2相同。
对比例1
采用东洋纺市售主剂和市售环氧固化剂，进行涂布复合，而后继续进行测试剥离强度。
对比例2
采用东洋纺市售主剂和市售环氧固化剂，同时添加酸酐单体（新日本理化制的RIKACID）和1，2-二甲基咪唑进行涂布复合，而后继续进行测试剥离强度。
对比例3
采用三井化学市售主剂和市售异氰酸酯固化剂，进行涂布复合，而后继续进行测试剥离强度。
| 4小时剥离强度 | 24小时剥离强度 | 120小时剥离强度 | 7天耐电解液 | |
| 制造例1 | 11.3 | 12.4 | 12.9 | 8.4 |
| 制造例2 | 12.4 | 12.8 | 13.1 | 10.2 |
| 制造例3 | 12.3 | 13.6 | 15.8 | 11.5 |
| 制造例4 | 12.4 | 14.5 | 16.3 | 11.9 |
| 制造例5 | 13.5 | 14.2 | 16.4 | 11.7 |
| 制造例6 | 11.8 | 13.7 | 15.9 | 10.4 |
| 制造例7 | 11.9 | 11.9 | 15.8 | 9.3 |
| 制造例8 | 11.5 | 14.2 | 14.5 | 10 |
| 制造例9 | 10.4 | 13.9 | 15.3 | 12.8 |
| 制造例10 | 9.5 | 11.3 | 13.1 | 9.8 |
| 对比例1 | 8.6 | 12.5 | 13.4 | 8.9 |
| 对比例2 | 9.2 | 12.4 | 13.6 | 9.6 |
| 对比例3 | 10.2 | 13.6 | 14.3 | 10.4 |
说明
剥离强度是指15mm，180度剥离强度数据，5支样条重复数据平均值。
耐电解液是指在85℃，加水0.1%，将样条放入电解液中测试。取出后用水冲干净，然后将水擦干进行测试。
以上制造例无法全部列举出所有种类，不限于以上一种填料进行增加，亦可多种填料进行混合使用；尺寸亦不限于此。
以上制造例按照锂电池铝塑膜干法工艺进行使用，结果满足锂电池铝塑膜的使用要求，同时部分填料效果优于目前市售主流粘结体系。
Claims (4)
1.一种锂电池铝塑膜胶粘剂的填料增强体系设计方法，其特征主剂中引入填料增强，提高复合膜的强度和韧性；填料包括碳酸钙、硫酸钡、玻纤、滑石粉、高岭土、二氧化硅、云母粉、硅灰石、二氧化钛中的一种或几种，但不仅限于此；填料的尺寸大小从1微米-1000微米之间，同时进行大小尺寸的协同补充。
2.根据权力要求1所述的填料增强体系设计方法，胶粘剂主剂的特征在于所述主体聚合物由改性氯化聚丙烯、改性氯化聚乙烯、改性聚丙烯、改性聚乙烯、改性乙烯丙烯酸共聚物、改性苯乙烯、改性POE、改性EVA、改性环烯烃、改性聚丁烯、改性聚戊烯中的一种或多种；同时添加部分部分填料，增大强度和韧性。
3.根据权力要求1所述的填料增强体系设计方法，固化剂可采用因氰酸酯、环氧树脂、催化剂的一种或多种共混。
4.根据权力要求1-3中的粘合剂为填料增强设计的胶粘剂，用于锂电池铝塑膜中金属与cpp之间的粘结。
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