CN114479696A - 一种绝缘体积溶胀胶带及其生产工艺 - Google Patents

一种绝缘体积溶胀胶带及其生产工艺 Download PDF

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CN114479696A
CN114479696A CN202210186308.4A CN202210186308A CN114479696A CN 114479696 A CN114479696 A CN 114479696A CN 202210186308 A CN202210186308 A CN 202210186308A CN 114479696 A CN114479696 A CN 114479696A
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Abstract

本发明公开了一种绝缘体积溶胀胶带及其生产工艺，包括以下步骤；将20‑30重量份的聚异氰酸酯化合物与10‑15重量份的增链剂混合反应成聚酯型热塑性聚氨酯溶液，将模当量为350的硬质聚氨酯利用70重量份的DMF溶液和30重量份的MEK溶液进行物理搅拌制得聚酯型热塑性聚氨酯溶液，将所述的S1和所述S2以重量份1:1的比例进行混合，其中添加混合后固体比例的钛白粉50重量份，再次添加1‑3重量份的聚异氰酸酯固化剂，充分混合后制得聚氨酯溶液。有益效果：在抗撕裂强度方面得到很大提升，在耐温性能方面从原来的80℃提升至120℃，本产品在电池内部经过电解液浸泡两小时后本产品在电池内部呈现体积增大从而填充电池内部。

Description

一种绝缘体积溶胀胶带及其生产工艺
技术领域
本发明涉及溶胀胶带技术领域，具体来说，涉及一种绝缘体积溶胀胶带及其生产工艺。
背景技术
在将电极组件收纳于圆柱形壳体中以制造电池时，电极组件的尺寸通常比圆柱形壳体的尺寸要小。因此，在电极组件和壳体内壁之间会形成间隙。在这种情况下，收纳于壳体中的电极组件可能由于外部振动或外部冲击而在壳体内部移动。电极组件的这种移动可能导致电池内部电阻的增大或者电极片的损坏，从而极大地劣化电池的性能。因此，有必要对间隙进行填充并固定电极组件，现有的锂电池专用的溶胀胶带一般耐高温性能较差，产品抗撕裂强度不够，影响其使用寿命。
针对相关技术中的问题，目前尚未提出有效的解决方案。
发明内容
针对相关技术中的问题，本发明提出一种绝缘体积溶胀胶带及其生产工艺，以克服现有相关技术所存在的上述技术问题。
为此，本发明采用的具体技术方案如下：
一种绝缘体积溶胀胶带及其生产工艺，包括以下步骤；
S1、将20-30重量份的聚异氰酸酯化合物与10-15重量份的增链剂混合反应成聚酯型热塑性聚氨酯溶液(软区)；
S2、将模当量为350的硬质聚氨酯利用70重量份的DMF溶液和30重量份的MEK溶液进行物理搅拌制得聚酯型热塑性聚氨酯溶液(硬区)；
S3、将所述的S1和所述S2以重量份1:1的比例进行混合，其中添加混合后固体比例的钛白粉50重量份，再次添加1-3重量份的聚异氰酸酯固化剂，充分混合后制得聚氨酯溶液；
S4、将高粘性可移胶水使用100重量份在其中添加0.8-2重量份的胺基类固化剂、再次添加0.1-0.3重量份的金属盐类固化剂，其中金属盐类固化剂需要使用5-10重量份的无水乙醇进行溶解，充分混合后制得耐电解液丙烯酸胶水。
根据本发明的另一个方面，提供了一种绝缘体积溶胀胶带的生产工艺，用于所述的绝缘体积溶胀胶带，包括以下步骤；
S5、将充分混合后的TPU溶液使用桥式涂覆机的狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面，经过桥式烤箱使用温度递增、递减的方式将涂覆好的产品使用温度40℃-160℃进行烘干从而制得绝缘体积溶胀胶带基膜；
S6、将涂覆好的聚氨酯基膜连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得聚异氰酸酯固化剂在TPU中发生链式反应从而提高绝缘体积溶胀胶带的抗撕裂强度；
S7、为了使得聚氨酯基膜附有粘性需要将固化好的聚氨酯基膜再次使用桥式涂覆机在聚氨酯基膜的另一面涂覆丙烯酸胶水；
S8、为了使得所述S7涂覆的丙烯酸胶水能够不被电解液腐蚀，将涂覆好的聚氨酯基膜加胶水连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得丙烯酸胶水内的胺基类固化剂和金属盐类固化剂在胶水内发生链式反应使得丙烯酸胶水本身耐电解液；
作为优选的，所述聚氨酯基膜的另一面涂覆丙烯酸胶水、橡胶胶水、硅胶胶水、胺基类胶水中的其中的一种。
作为优选的，所述狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面、聚酯离型膜也可以是CPP、PE、PET或离型膜中的其中一种。
本发明的有益效果为：在抗撕裂强度方面得到很大提升，在耐温性能方面从原来的80℃提升至120℃，本产品在电池内部经过电解液浸泡两小时后本产品在电池内部呈现体积增大从而填充电池内部空隙，现有产品在抗撕裂方面表现偏弱，终端使用电池时如果遇到高振动容易使电芯移位造成充电不良从而使得电池寿命大幅降低甚至电池报废。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是根据本发明实施例的一种绝缘体积溶胀胶带的流程图；
图2是根据本发明实施例的一种绝缘体积溶胀胶带及其生产工艺的流程图。
具体实施方式
为进一步说明各实施例，本发明提供有附图，这些附图为本发明揭露内容的一部分，其主要用以说明实施例，并可配合说明书的相关描述来解释实施例的运作原理，配合参考这些内容，本领域普通技术人员应能理解其他可能的实施方式以及本发明的优点，图中的组件并未按比例绘制，而类似的组件符号通常用来表示类似的组件。
根据本发明的实施例，提供了一种绝缘体积溶胀胶带及其生产工艺。
实施例一；
如图1-2所示，根据本发明实施例的绝缘体积溶胀胶带及其生产工艺，包括以下步骤；
S1、将20-30重量份的聚异氰酸酯化合物与10-15重量份的增链剂混合反应成聚酯型热塑性聚氨酯溶液(软区)；
S2、将模当量为350的硬质聚氨酯利用70重量份的DMF溶液和30重量份的MEK溶液进行物理搅拌制得聚酯型热塑性聚氨酯溶液(硬区)；
S3、将所述的S1和所述S2以重量份1:1的比例进行混合，其中添加混合后固体比例的钛白粉50重量份，再次添加1-3重量份的聚异氰酸酯固化剂，充分混合后制得聚氨酯溶液；
S4、将高粘性可移胶水使用100重量份在其中添加0.8-2重量份的胺基类固化剂、再次添加0.1-0.3重量份的金属盐类固化剂，其中金属盐类固化剂需要使用5-10重量份的无水乙醇进行溶解，充分混合后制得耐电解液丙烯酸胶水。
实施例二；
如图1-2所示，提供了一种绝缘体积溶胀胶带的生产工艺，用于所述的绝缘体积溶胀胶带，包括以下步骤；
S5、将充分混合后的TPU溶液使用桥式涂覆机的狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面，经过桥式烤箱使用温度递增、递减的方式将涂覆好的产品使用温度40℃-160℃进行烘干从而制得绝缘体积溶胀胶带基膜；
S6、将涂覆好的聚氨酯基膜连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得聚异氰酸酯固化剂在TPU中发生链式反应从而提高绝缘体积溶胀胶带的抗撕裂强度；
S7、为了使得聚氨酯基膜附有粘性需要将固化好的聚氨酯基膜再次使用桥式涂覆机在聚氨酯基膜的另一面涂覆丙烯酸胶水；
S8、为了使得所述S7涂覆的丙烯酸胶水能够不被电解液腐蚀，将涂覆好的聚氨酯基膜加胶水连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得丙烯酸胶水内的胺基类固化剂和金属盐类固化剂在胶水内发生链式反应使得丙烯酸胶水本身耐电解液；
实施例三；
如图1-2所示，所述聚氨酯基膜的另一面涂覆丙烯酸胶水、橡胶胶水、硅胶胶水、胺基类胶水中的其中的一种。
实施例四；
如图1-2所示，所述狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面、聚酯离型膜也可以是CPP、PE、PET或离型膜中的其中一种。
综上所述，借助于本发明的上述技术方案，在抗撕裂强度方面得到很大提升，在耐温性能方面从原来的80℃提升至120℃，本产品在电池内部经过电解液浸泡后小时后本产品在电池内部呈现体积增大从而填充电池内部空隙，现有产品在抗撕裂方面表现偏弱，终端使用电池时如果遇到高振动容易使电芯移位造成充电不良从而使得电池寿命大幅降低甚至电池报废。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。

Claims (4)

1.一种绝缘体积溶胀胶带，其特征在于，包括以下步骤；
S1、将20-30重量份的聚异氰酸酯化合物与10-15重量份的增链剂混合反应成聚酯型热塑性聚氨酯溶液；
S2、将模当量为350的硬质聚氨酯利用70重量份的DMF溶液和30重量份的MEK溶液进行物理搅拌制得聚酯型热塑性聚氨酯溶液；
S3、将所述的S1和所述S2以重量份1:1的比例进行混合，其中添加混合后固体比例的钛白粉50重量份，再次添加1-3重量份的聚异氰酸酯固化剂，充分混合后制得聚氨酯溶液；
S4、将高粘性可移胶水使用100重量份在其中添加0.8-2重量份的胺基类固化剂、再次添加0.1-0.3重量份的金属盐类固化剂，其中金属盐类固化剂需要使用5-10重量份的无水乙醇进行溶解，充分混合后制得耐电解液丙烯酸胶水。
2.一种绝缘体积溶胀胶带的生产工艺，其特征在于，用于权利要求1所述的绝缘体积溶胀胶带，包括以下步骤；
S5、将充分混合后的TPU溶液使用桥式涂覆机的狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面，经过桥式烤箱使用温度递增、递减的方式将涂覆好的产品使用温度40℃-160℃进行烘干从而制得绝缘体积溶胀胶带基膜；
S6、将涂覆好的聚氨酯基膜连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得聚异氰酸酯固化剂在TPU中发生链式反应从而提高绝缘体积溶胀胶带的抗撕裂强度；
S7、为了使得聚氨酯基膜附有粘性需要将固化好的聚氨酯基膜再次使用桥式涂覆机在聚氨酯基膜的另一面涂覆丙烯酸胶水；
S8、为了使得所述S7涂覆的丙烯酸胶水能够不被电解液腐蚀，将涂覆好的聚氨酯基膜加胶水连带聚酯离型膜放入40-70℃的恒温间进行24-48小时的固化使得丙烯酸胶水内的胺基类固化剂和金属盐类固化剂在胶水内发生链式反应使得丙烯酸胶水本身耐电解液。
3.根据权利要求2所述的一种绝缘体积溶胀胶带及其生产工艺，其特征在于，所述聚氨酯基膜的另一面涂覆丙烯酸胶水、橡胶胶水、硅胶胶水、胺基类胶水中的其中的一种。
4.根据权利要求3所述的一种绝缘体积溶胀胶带及其生产工艺，其特征在于，所述狭缝涂覆头均匀涂覆在残余结着力在30-70％的聚酯离型膜离型面、聚酯离型膜也可以是CPP、PE、PET或离型膜中的其中一种。
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CN111518481A (zh) * 2020-04-09 2020-08-11 芜湖徽氏新材料科技有限公司 一种锂电池专用溶胀胶带及其制造工艺

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