CN103443230A - 填充间隙用溶胀胶带 - Google Patents
填充间隙用溶胀胶带 Download PDFInfo
- Publication number
- CN103443230A CN103443230A CN2012800160334A CN201280016033A CN103443230A CN 103443230 A CN103443230 A CN 103443230A CN 2012800160334 A CN2012800160334 A CN 2012800160334A CN 201280016033 A CN201280016033 A CN 201280016033A CN 103443230 A CN103443230 A CN 103443230A
- Authority
- CN
- China
- Prior art keywords
- stratum basale
- methyl
- adhesive tape
- acrylate
- swelling
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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- 238000011049 filling Methods 0.000 title claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 42
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- 210000000438 stratum basale Anatomy 0.000 claims description 112
- 239000002390 adhesive tape Substances 0.000 claims description 87
- -1 acrylic ester Chemical class 0.000 claims description 75
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 56
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- 125000002496 methyl group Chemical group [H]C([H])([H])* 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
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- UHESRSKEBRADOO-UHFFFAOYSA-N ethyl carbamate;prop-2-enoic acid Chemical compound OC(=O)C=C.CCOC(N)=O UHESRSKEBRADOO-UHFFFAOYSA-N 0.000 claims description 7
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Abstract
本发明提供一种填充间隙用溶胀胶带以及填充间隙的方法。所述溶胀胶带可以应用于有流体的间隙中,实现3D形状从而填充该间隙,并且在必要时可以用于固定形成间隙的对象。
Description
技术领域
本发明涉及一种填充间隙用溶胀胶带以及填充间隙的方法。
背景技术
通常而言,必须对两个间隔对象之间的间隙进行填充。并且,经常需要使两个间隔开来形成间隙的对象通过填充这些间隙而被固定。
例如,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。
发明内容
技术问题
本发明旨在提供一种填充间隙用的溶胀胶带以及填充间隙的方法。
技术方案
本发明的一方面提供一种填充间隙用的溶胀胶带。例如,所述胶带可以包括基底层,和在所述基底层的至少一个表面上形成的压敏粘合层。上述基底层具有在纵向上变形的性质(例如,当该基底层与流体(比如液体)接触时),或者可以包含氨基甲酸酯键、酯键或醚键,或可以包含纤维素酯化合物。根据一个示例性实施方案,该基底层可以是在纵向上溶胀的基底层,例如,当所述基底层与流体(比如液体)接触时。
此处所使用的术语“填充间隙用溶胀胶带”可以是指一种起到对间隔开的两个对象之间的间隙进行填充,并在必要时使这两个对象相互固定的作用的胶带。根据一个示例性实施方案,所述溶胀胶带,例如,以通过所述压敏粘合层为介质粘贴于其间形成有间隙的两个对象中任意一个之上的状态,可以在所述基底层与比如液体的流体接触时实现三维(3D)形状,该形状能够通过压敏粘合层的固定力和经由溶胀基底层所产生的力之间的相互平衡而填充间隙。根据一个示例性实施方案,间隔开来形成间隙的两个对象中的每个都可以是电池的电极组件和收纳该组件的壳体,但本发明并不局限于此。在这种情况下,所述胶带可以是例如用于电极组件的密封胶带,且可以用于防止电极组件的解体以及将该电极组件固定在电池的壳体内。
图1为显示了由溶胀胶带通过在间隙中实现3D形状而填充该间隙的过程的示意图。
如图1中所示,胶带101通过压敏粘合层而粘贴于其间形成有间隙的两个对象103和104中的任意一个对象104之上。例如,将流体引入上述粘贴状态下的间隙中,从而接触溶胀胶带101的基底层并引起该基底层在纵向上的溶胀。在这种情况下,由于所述基底层在胶带101通过压敏粘合层而固定于对象104上的状态下发生溶胀,因此溶胀胶带102可以实现3D形状。通过上述3D形状可以对间隙进行填充,并且可以在必要时使其间形成有间隙的两个对象103和104相互固定。
就此而言,通过所述溶胀胶带实现的3D形状的尺寸,即间隙宽度,可以在例如0.001mm至2.0mm、0.001mm至1.0mm或0.01mm至0.5mm的范围内。然而,上述3D形状的尺寸可以根据应用溶胀胶带的间隙的具体种类而变化,但本发明并不局限于此。如以下所将要公开的,根据应用溶胀胶带的间隙的尺寸,3D形状的尺寸可以例如通过调节压敏粘合层的剥离强度或基底层的应变而进行控制。
在所述胶带中包括的基底层可以是,例如,当该基底层与流体比如液体接触时具有在纵向上变形的性质的基底层。例如,所述基底层可以是当该基底层与上述流体接触时具有在纵向上溶胀的性质的基底层。
在全说明书中,此处所使用的术语“纵向”可以是指当基底层保持在平坦的水平面上时,与该基底层的厚度方向(例如,图2中所示的箭头所指示的方向)垂直的方向。另外,术语“垂直”或“水平”可以是指在对所需效果不造成损害的范围内基本上垂直或水平,并且例如可以包含±10°、±5°或±3°的误差。
可以使用可在包括宽度、长度或对角线方向的任意方向上发生变形(例如溶胀)的基底层而没有限制,只要该基底层具有在纵向上变形(例如溶胀)的性质即可。
根据一个示例性实施方案,根据下面的等式1,所述基底层在纵向上的应变可以为10%或大于10%。
[等式1]
基底层纵向应变=(L2-L1)/L1×100
在等式1中,L1表示在所述基底层与流体接触前该基底层的初始长度;L2表示在室温或60℃下所述基底层与所述流体接触24小时后测得的该基底层的长度。
对于根据等式1的计算,基底层所接触的流体的具体种类,是根据待填充间隙的具体状态而进行选择的,但本发明并不局限于此。根据一个示例性实施方案,当待填充的间隙由电极组件和收纳该电极组件的壳体形成时,所述流体可以是待注入壳体内部的液态的电解质。就此而言,术语“电解质”可以是指将用于例如电池等中的离子传导介质。
另外,在本说明书中,术语“室温”可以是指不被加热或冷却的自然发生的温度,例如可以是指约10℃至约30℃、约20℃至约30℃或约25℃。
基底层在纵向上的应变可以根据所要实现的3D形状的尺寸而变形,例如可以为30%或大于30%、40%或大于40%、50%或大于50%、60%或大于60%、70%或大于70%、80%或大于80%、或者90%或大于90%。对于基底层在纵向上的应变的上限没有特殊限制。换句话说,应变值越高,可实现的3D形状越大,因此可以例如根据所需3D形状的尺寸而对应变进行控制。例如,基底层的应变上限可以为约500%。
在等式1中,L1和L2表示基底层与流体接触前、后的基底层长度。相对于基底层,在预定方向上测量该长度。只要在测量L1和L2时应用相同的方向,则对于长度测量的具体方向没有特殊限制。
例如,当基底层为矩形片状形状时,该基底层的长度可以是在宽度、长度或对角线方向上的长度,或者可以是在平面上的任意方向上的长度。然而,由于在测量L1和L2时可以应用相同的长度测量方向,因此,例如,当基底层的宽度长度用作L1时,则该基底层的宽度长度也用作L2。
对于基底层的形状没有特殊限制,但是例如可以为膜或片的形状。另外,所述具有膜或片形状的基底层可以为例如矩形、圆形、三角形或无规则的形状。
用于基底层的材料可以包括能够具有上述应变的任意材料。根据一个示例性实施方案,所述基底层可以是聚合物膜或片,且可以是通过在制造过程中的拉伸或收缩条件而制得当该基底层与流体接触时具有上述变形性质的膜或片。
根据一个示例性实施方案,可以使用包含氨基甲酸酯键、酯键或醚键,或纤维素酯化合物的基底层作为所述基底层。
上述基底层可以包含,例如,基于丙烯酸酯的基底层、基于聚氨酯的基底层、基于环氧的基底层或基于纤维素的基底层。
根据一个示例性实施方案,可以使用活性能量射线可固化组合物的浇铸层(cast layer)作为所述基于丙烯酸酯、所述基于聚氨酯或所述基于环氧的基底层。
此处所使用的术语“浇铸层”可以是指采用浇铸法对可固化组合物进行涂布后通过固化涂层而形成的基底层。
另外,如上所述的术语“活性能量射线可固化组合物”可以是指一种用活性能量射线照射而固化的组合物。如上所述的活性能量射线的范围也可以包括例如α-粒子束、质子束、中子束和电子束的粒子束,以及微波、红外线(IR)、紫外线(UV)、X射线和γ射线。
所述组合物可以包含,例如,活性能量射线可固化丙烯酸酯化合物和自由基可聚合稀释剂。
如上所述的活性能量射线可固化丙烯酸酯化合物可以包括,例如,在本领域中已知作为光固化低聚物的聚氨酯丙烯酸酯。
所述聚氨酯丙烯酸酯可以包括,例如,包含含有羟基的(甲基)丙烯酸酯和多异氰酸酯化合物的混合物的反应物。就此而言,所述多异氰酸酯化合物可以是含有至少两个异氰酸酯基的化合物,例如脂族、脂环族或芳族多异氰酸酯,且具体可以包括例如2,4-甲苯二异氰酸酯、2,6-甲苯二异氰酸酯、1,3-苯二亚甲基二异氰酸酯、1,4-苯二亚甲基二异氰酸酯、二苯基甲烷-4,4′-二异氰酸酯、异佛尔酮二异氰酸酯等。另外,所述含有羟基的(甲基)丙烯酸酯可以包括(甲基)丙烯酸羟基烷基酯,例如(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、(甲基)丙烯酸6-羟己酯或(甲基)丙烯酸8-羟辛酯,但本发明并不局限于此。
所述聚氨酯丙烯酸酯可以包括,例如,包含含有羟基的(甲基)丙烯酸酯和在其末端含有异氰酸酯基的聚氨酯预聚物的反应物,例如包含多异氰酸酯和多元醇酯的混合物的反应物。所述多元醇酯可以包括,例如,多元醇和/或多元醇醚,以及用酸组分如二元酸或其酐酯化的反应物。所述多元醇可以包括例如乙二醇、丙二醇、环己烷二甲醇、3-甲基-1,5-戊二醇等;所述多元醇醚可以包括例如,聚亚烷基二醇如聚乙二醇、聚丙二醇或聚丁二醇,嵌段或无规聚合物二醇如聚乙烯聚丙氧基嵌段聚合物二醇;所述酸组分可以包括例如二元酸或其酐,如己二酸、丁二酸、邻苯二甲酸、四氢化邻苯二甲酸、六氢化邻苯二甲酸和对苯二甲酸,但本发明并不局限于此。并且,所述含有羟基的(甲基)丙烯酸酯和所述多异氰酸酯可以包括上述化合物。
并且,所述聚氨酯丙烯酸酯可以是包含含有羟基的(甲基)丙烯酸酯和在其末端含有异氰酸酯的聚氨酯预聚物的混合物的反应物,例如包含多异氰酸酯和多元醇醚的混合物的反应物。
并且,所述活性能量射线可固化丙烯酸酯化合物可以包括环氧丙烯酸酯、聚酯丙烯酸酯、聚醚丙烯酸酯等。
所述聚酯丙烯酸酯可以包括,例如,包含(甲基)丙烯酸和多元醇酯的混合物的脱水缩合反应物。在这种情况下,上述化合物可以作为可用的多元醇酯来使用。
另外,所述聚醚丙烯酸酯可以包括,例如,聚亚烷基二醇二(甲基)丙烯酸酯如聚乙二醇二(甲基)丙烯酸酯、聚丙二醇二(甲基)丙烯酸酯或聚丁二醇二(甲基)丙烯酸酯,并且所述环氧丙烯酸酯可以是包含(甲基)丙烯酸和环氧树脂的混合物的加成反应物。在这种情况下,所述环氧树脂的种类可以包括本领域中已知的普通芳族或脂族环氧树脂,但本发明并不局限于此。
在所述组合物中包含的自由基可聚合稀释剂可以包括,例如,含有通过用活性能量射线照射能够参与自由基聚合反应的官能团的单体。
所述单体可以是(甲基)丙烯酸酯单体,且可以是例如选自(甲基)丙烯酸烷基酯、含烷氧基的(甲基)丙烯酸酯、含脂环基的(甲基)丙烯酸酯、含芳基的(甲基)丙烯酸酯、含杂环的(甲基)丙烯酸酯和多官能丙烯酸酯中的至少一种。
所述(甲基)丙烯酸烷基酯可以包括,例如,包含具有1至20个碳原子的烷基的(甲基)丙烯酸烷基酯,如(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸正丙酯、(甲基)丙烯酸异丙酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸叔丁酯、(甲基)丙烯酸仲丁酯、(甲基)丙烯酸戊酯、(甲基)丙烯酸2-乙基己酯、(甲基)丙烯酸2-乙基丁酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸异辛酯、(甲基)丙烯酸异壬酯、(甲基)丙烯酸十二烷基酯和(甲基)丙烯酸十四烷基酯;所述含烷氧基的(甲基)丙烯酸酯可以包括,例如,2-(2-乙氧基乙氧基)乙基(甲基)丙烯酸酯、乙二醇苯醚(甲基)丙烯酸酯、聚乙二醇(聚合度为2至8)苯醚(甲基)丙烯酸酯、乙二醇壬基苯基醚(甲基)丙烯酸酯、聚乙二醇(聚合度为2至8)壬基苯基醚(甲基)丙烯酸酯等;所述含脂环基的(甲基)丙烯酸酯可以包括,例如,异冰片基(甲基)丙烯酸酯、二环戊烯基(甲基)丙烯酸酯、二环氧戊烯基(甲基)丙烯酸酯等;所述含芳基的(甲基)丙烯酸酯可以包括,例如,苯基羟基丙基(甲基)丙烯酸酯、(甲基)丙烯酸苄酯等;所述含杂环的(甲基)丙烯酸酯可以包括,例如,(甲基)丙烯酸四氢糠酯、吗啉基(甲基)丙烯酸酯等;所述多官能丙烯酸酯可以包括,例如,双官能丙烯酸酯,如1,4-丁二醇二(甲基)丙烯酸酯、1,6-己二醇二(甲基)丙烯酸酯、新戊二醇二(甲基)丙烯酸酯、聚乙二醇二(甲基)丙烯酸酯、新戊二醇己二酸二(甲基)丙烯酸酯、羟基新戊酸新戊二醇二(甲基)丙烯酸酯、二环戊基二(甲基)丙烯酸酯、己内酯改性的二环戊烯基二(甲基)丙烯酸酯、环氧乙烷改性的二(甲基)丙烯酸酯、二(甲基)丙烯酰氧基乙基异氰脲酸酯、烯丙基化环己基二(甲基)丙烯酸酯、三环癸烷二甲醇(甲基)丙烯酸酯、二羟甲基二环戊烷二(甲基)丙烯酸酯、环氧乙烷改性的六氢邻苯二甲酸二(甲基)丙烯酸酯、三环癸烷二甲醇(甲基)丙烯酸酯、新戊二醇改性的三甲基丙烷二(甲基)丙烯酸酯、金刚烷二(甲基)丙烯酸酯或9,9-双[4-(2-丙烯酰氧基乙氧基)苯基]芴;三官能丙烯酸酯,如三羟甲基丙烷三(甲基)丙烯酸酯、二季戊四醇三(甲基)丙烯酸酯、丙酸改性的二季戊四醇三(甲基)丙烯酸酯、季戊四醇三(甲基)丙烯酸酯、环氧丙烷改性的三羟甲基丙烷三(甲基)丙烯酸酯、三官能聚氨酯(甲基)丙烯酸酯或三(甲基)丙烯酰氧基乙基异氰脲酸酯;四官能丙烯酸酯,如双甘油四(甲基)丙烯酸酯或季戊四醇四(甲基)丙烯酸酯;五官能丙烯酸酯,如丙酸改性的二季戊四醇五(甲基)丙烯酸酯;和六官能丙烯酸酯,如二季戊四醇六(甲基)丙烯酸酯、己内酯改性的二季戊四醇六(甲基)丙烯酸酯或聚氨酯(甲基)丙烯酸酯(例如,三羟甲基丙烷三(甲基)丙烯酸酯与异氰酸酯单体的反应物);但本发明并不局限于此。
并且,所述稀释剂可以包括含有极性官能团的单体,具体而言,含有羟基、羧基、含氮基团或缩水甘油基的单体。所述含有羟基的单体可以包括(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、(甲基)丙烯酸6-羟己酯、(甲基)丙烯酸8-羟辛酯、(甲基)丙烯酸2-羟基乙二醇酯或(甲基)丙烯酸2-羟基丙二醇酯等;所述含有羧基的单体可以包括(甲基)丙烯酸、2-(甲基)丙烯酰氧基乙酸、3-(甲基)丙烯酰氧基丙酸、4-(甲基)丙烯酰氧基丁酸、丙烯酸二聚体、衣康酸、马来酸或马来酸酐等;所述含有含氮基团的单体可以包括(甲基)丙烯酰胺、N-乙烯基吡咯烷酮、N-乙烯基己内酰胺等;所述含有缩水甘油基的单体可以包括(甲基)丙烯酸缩水甘油酯等;但本发明并不局限于此。
上述丙烯酸组合物可以包含,例如,30重量份至99重量份的所述活性能量射线可固化丙烯酸酯化合物和1重量份至70重量份的所述自由基可聚合稀释剂。然而,所述丙烯酸酯化合物与自由基可聚合稀释剂的重量百分比和种类可以例如鉴于所需的应变而改变。
除非另外指出,此处所使用的单元“重量份”是指重量比。
并且,所述组合物可以还包含光引发剂。所述光引发剂可以通过用活性能量射线照射而引发该组合物的聚合反应。
所述光引发剂可以包括,例如,已知的光引发剂如基于安息香、基于羟基酮、基于氨基酮、基于过氧化物或基于氧化膦的光引发剂。
基于全部100重量份的所述丙烯酸酯化合物和稀释剂,所述组合物可以包含0.01重量份至10重量份或0.1重量份至5重量份的所述光引发剂。可以将光引发剂的含量控制在上述范围内,以引发有效的固化反应并防止由固化过程后剩余的组分所造成的物理性质的退化等。
必要时,所述组合物可以还包含选自颜料和染料、环氧树脂、交联剂、紫外线稳定剂、抗氧化剂、调色剂、增强剂、填充剂、消泡剂、表面活性剂、光敏增稠剂和增塑剂中的至少一种添加剂。
所述浇铸层可以通过如下过程制造:采用浇铸法将上述组合物涂布至适当的厚度,和通过用活性能量射线照射而引发聚合反应,固化该组合物。
浇铸组合物的具体方法可以例如鉴于所需的厚度而以例如棒式涂布法、刮涂法、辊式涂布法、喷涂法、凹版涂布法、幕涂法、缺角轮涂布法或唇涂法(lip coating)的方法来进行,但本发明并不局限于此。
另外,可以利用金属卤化物灯、高压汞灯、黑光灯、感应灯、氙灯等来进行用活性能量射线例如紫外线(UV射线)的照射。照射活性能量射线的条件例如波长、辐射光强度等可以鉴于组合物的组成等来进行选择,但本发明并不具体局限于此。
并且,所述聚氨酯基底层例如可以包含聚氨酯树脂如热塑性聚氨酯(TPU),或者例如可以包含可固化聚氨酯组合物的浇铸层。
所述可固化聚氨酯组合物可以是例如一种通过加热而固化的组合物,且可以包括包含多元醇和异氰酸酯化合物的组合物。
所述多元醇可以包括,例如,亚烷基二醇、二亚烷基二醇、苯二酚(例如邻苯二酚、间苯二酚或对苯二酚)、苯三酚(例如1,2,3-苯三酚)、二醇胺、三醇胺、阿糖醇、甘露糖醇、异麦芽酮糖醇、甘油、木糖醇、山梨糖醇、麦芽糖醇、赤藓糖醇、核糖醇、卫矛醇、乳糖醇、苏糖醇、艾杜糖醇或多糖醇等。另外,所述异氰酸酯化合物可以包括,例如,如上述聚氨酯丙烯酸酯的列表中所述的多异氰酸酯。在亚烷基或二亚烷基二醇中包含的亚烷基可以包括,例如,含有1至20个碳原子、1至16个碳原子、1至12个碳原子、1至8个碳原子或1至4个碳原子的亚烷基。
所述可固化聚氨酯组合物可以包含,例如,多元醇和多异氰酸酯,从而使所述多元醇的羟基(OH)与所述多异氰酸酯的异氰酸酯基(NCO)的当量比可以基本上等于约1:1。然而,该当量比可以例如鉴于所需的应变等而改变。
所述浇铸层可以通过如下过程制造:以与浇铸所述活性能量射线可固化组合物的相似方法浇铸所述聚氨酯组合物,然后通过对该浇铸的涂层进行适当加热而固化该聚氨酯组合物。
当使用基于纤维素的基底层作为所述基底层时,该基底层可以包含乙酸纤维素树脂或纤维素烷基化物树脂(cellulose alkylate resin)。在这种情况下,可以使用通过使包含以上树脂的混合物进行挤出或浇铸过程而制得的基底层。所述纤维素烷基化物可以包括,例如,乙酸丙酸纤维素、乙酸丁酸纤维素等。
使用上述树脂制造基底层的方法可以包括,例如,将包含上述树脂和已知添加剂(必要时)的原料应用于常规的膜或片材的模制过程例如挤出或浇铸中,但是为了使基底层表现出例如溶胀性质的变形性质,在模制过程中还应用适当的处理,但本发明并不具体局限于此。
当所述基底层为片或膜型时,该基底层的厚度可以例如鉴于待填充间隙的尺寸或实现所需3D形状的概率等进行选择,但本发明并不局限于此。
所述胶带可以包括在所述基底层的至少一个表面上形成的压敏粘合层。例如,所述压敏粘合层可以以平行于上述基底层的纵向的方向在该基底层的至少一个表面上形成。图2为所述胶带的横截面示意图,该示意图显示了包括压敏粘合层202的胶带2,其中压敏粘合层202以平行于基底层201的纵向的方向在基底层201的一个表面上形成。
在利用如上所述在平行于基底层的纵向的方向上形成的压敏粘合层而将胶带固定住的状态下,通过使所述胶带与流体接触而发生变形(例如溶胀),该胶带可以经由上述变形而实现在垂直于基底层纵向的方向上突出的3D形状。
为了实现上述3D形状,所述压敏粘合层可以设计为具有适当的剥离强度。例如,当剥离强度小于实现所需3D形状的范围时,压敏粘合层可能无法适当地支持由基底层变形(例如溶胀)所产生的应力,从而使得胶带可能剥离或者可能难以实现上述3D形状。另一方面,当剥离强度在所述剥离强度范围以上时,压敏粘合层可能过度地抑制基底层的变形,从而可能难以实现上述3D形状。剥离强度可以为,例如,100gf/25mm或大于100gf/25mm、150gf/25mm或大于150gf/25mm、200gf/25mm或大于200gf/25mm、300gf/25mm或大于300gf/25mm、400gf/25mm或大于400gf/25mm、500gf/25mm或大于500gf/25mm、600gf/25mm或大于600gf/25mm、700gf/25mm或大于700gf/25mm、800gf/25mm或大于800gf/25mm、900gf/25mm或大于900gf/25mm、1,000gf/25mm或大于1,000gf/25mm、1,100gf/25mm或大于1,100gf/25mm、1,200gf/25mm或大于1,200gf/25mm、1,300gf/25mm或大于1,300gf/25mm、1,400gf/25mm或大于1,400gf/25mm、1,500gf/25mm或大于1,500gf/25mm、1,600gf/25mm或大于1,600gf/25mm、1,700gf/25mm或大于1,700gf/25mm或者1,800gf/25mm或大于1,800gf/25mm。然而,上述剥离强度可以例如根据待填充的间隙或所要实现的3D形状的尺寸改变,但本发明并不特别局限于此。所述剥离强度可以是,例如,对于玻璃板或任意一种形成待填充间隙的对象的剥离强度。另外,该剥离强度可以在室温下测量,且可以在5mm/sec的剥离速度和180°的剥离角下测量。
另外,所述压敏粘合层的剥离强度可以鉴于实现所需3D形状的概率而进行控制,且对于剥离强度的上限没有特别限定。
可以使用多种压敏粘合层作为所述压敏粘合层,只要它们能够表现出上述剥离强度即可。例如,可以将丙烯酸压敏粘合剂、聚氨酯压敏粘合剂、环氧压敏粘合剂、硅压敏粘合剂或基于橡胶的压敏粘合剂等用于所述压敏粘合层。
根据一个示例性实施方案,所述压敏粘合层可以是丙烯酸压敏粘合层,并且例如可以包含由多官能交联剂交联的丙烯酸类聚合物。
所述丙烯酸类聚合物可以包括,例如,重均分子量(Mw)为400,000或大于400,000的丙烯酸类聚合物。重均分子量是通过凝胶渗透色谱法(GPC)测得的相对于标准聚苯乙烯的转换值。除非另外指出,此处使用的术语“分子量”是指重均分子量。所述丙烯酸类聚合物的分子量上限可以控制在例如2,500,000或小于2,500,000,但本发明并不特别局限于此。
所述丙烯酸类聚合物可以包含,例如,含有可交联官能团的可共聚单体和聚合型的(甲基)丙烯酸酯单体。在这种情况下,各单体的重量比可以例如鉴于所需的剥离强度而进行设计,但本发明并不特别局限于此。
在所述聚合物中包含的(甲基)丙烯酸酯单体可以包括,例如,(甲基)丙烯酸烷基酯,并且鉴于压敏粘合剂的粘结性、玻璃化转变温度或粘合性而可以包括含有1至14个碳原子的烷基的(甲基)丙烯酸烷基酯。所述单体可以包括,例如,(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸正丙酯、(甲基)丙烯酸异丙酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸叔丁酯、(甲基)丙烯酸仲丁酯、(甲基)丙烯酸戊酯、(甲基)丙烯酸2-乙基己酯、(甲基)丙烯酸2-乙基丁酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸异辛酯、(甲基)丙烯酸异壬酯、(甲基)丙烯酸十二烷基酯、(甲基)丙烯酸十四烷基酯等中的一种、两种或更多种,但本发明并不局限于此。
所述含有可交联官能团的可共聚单体可以与所述(甲基)丙烯酸酯单体或聚合物中包含的另一种单体进行共聚,并且可以在共聚反应后向聚合物主链提供能够与多官能交联剂反应的交联点。所述可交联官能团可以为羟基、羧基、异氰酸酯基、缩水甘油基、酰胺基等。在某些情况下,所述可交联官能团可以是可光致交联官能团,例如丙烯酰基或2-甲基丙烯酰基。所述可光致交联官能团可以通过使由所述可共聚单体提供的可交联官能团与含有可光致交联官能团的化合物反应而引入。在制备压敏粘合剂的领域中已知多种可根据所需官能团而进行使用的可共聚单体。所述单体的实例可以是含有羟基的单体如(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、(甲基)丙烯酸6-羟己酯、(甲基)丙烯酸8-羟辛酯、(甲基)丙烯酸2-羟基乙二醇酯或(甲基)丙烯酸2-羟基丙二醇酯;含有羧基的单体如(甲基)丙烯酸、2-(甲基)丙烯酰氧基乙酸、3-(甲基)丙烯酰氧基丙酸、4-(甲基)丙烯酰氧基丁酸、丙烯酸二聚体、衣康酸、马来酸和马来酸酐;(甲基)丙烯酸缩水甘油酯、(甲基)丙烯酰胺、N-乙烯基吡咯烷酮、N-乙烯基己内酰胺等;但本发明并不局限于此。在所述聚合物中可以包含一种、两种或更多种上述单体。
必要时,所述丙烯酸类聚合物还可以包含另一种聚合型的功能性共聚单体,并且例如可以是下面的通式1表示的单体。
[通式1]
在通式1中,R1至R3各自独立地为氢或烷基;R4为氰基、经烷基取代或未取代的苯基、乙酰氧基或COR5,其中R5为经烷基或烷氧基烷基取代或未取代的氨基或缩水甘油氧基。
在通式1的R1至R5的定义中,所述烷基或烷氧基是指C1至C8的烷基或烷氧基,优选为甲基、乙基、甲氧基、乙氧基、丙氧基或丁氧基。
通式1的单体的具体实例可以是羧酸的乙烯基酯,例如(甲基)丙烯腈、N-甲基(甲基)丙烯酰胺、N-丁氧基甲基(甲基)丙烯酰胺、苯乙烯、甲基苯乙烯或乙烯乙酸酯,但本发明并不局限于此。
所述丙烯酸类聚合物可以例如通过溶液聚合法、光聚合法、本体聚合法、悬浮聚合法、乳液聚合法等来制备。
对于在压敏粘合层中起到交联丙烯酸类聚合物作用的所述多官能交联剂的种类没有特别限制,但是可以根据聚合物中所含可交联官能团的种类,从已知的交联剂如异氰酸酯交联剂、环氧交联剂、氮丙啶交联剂、金属螯合交联剂或光致交联剂中选择合适的交联剂。所述异氰酸酯交联剂的实例可以是二异氰酸酯,例如甲苯二异氰酸酯、二异氰酸二甲苯酯、二苯甲烷二异氰酸酯、六亚甲基二异氰酸酯、异佛尔酮二异氰酸酯、四甲基二甲苯二异氰酸酯或萘二异氰酸酯,或二异氰酸酯和多元醇的反应物等。在此,可以使用三羟甲基丙烷作为所述多元醇。所述环氧交联剂可以包括乙二醇二缩水甘油醚、三缩水甘油基醚、三羟甲基丙烷三缩水甘油基醚、N,N,N′,N′-四缩水甘油基乙二胺、甘油二缩水甘油基醚等;所述氮丙啶交联剂可以包括N,N′-甲苯-2,4-双(1-氮丙啶甲酰胺)、N,N′-二苯甲烷-4,4′-双(1-氮丙啶甲酰胺)、三亚乙基三聚氰胺、二间苯二酰-1-(2-甲基氮丙啶)、三(1-氮丙啶基)氧化膦等;所述金属螯合交联剂可以包括在例如乙酰丙酮或乙酰乙酸乙酯的化合物上配位有多价金属的化合物。在这种情况下,所述多价金属可以包括铝、铁、锌、锡、钛、锑、镁或钒等;所述光致交联剂可以包括多官能丙烯酸酯等。可以鉴于聚合物中包含的可交联官能团的种类,使用一种、两种或更多种上述交联剂。
可以例如鉴于所需的剥离强度,对所述压敏粘合层中多官能交联剂的重量比进行控制。
上述压敏粘合层可以例如通过如下方法形成:涂布通过混合如上所述的丙烯酸类聚合物和多官能交联剂而得到的涂层溶液,然后在适当条件下引发所述聚合物和多官能交联剂的交联反应。
在不影响预期目的的范围内,所述压敏粘合层还可以包含选自偶联剂、增粘剂、环氧树脂、紫外线稳定剂、抗氧化剂、调色剂、增强剂、填充剂、消泡剂、表面活性剂和增塑剂中的至少一种添加剂。
可以根据所应用的用途,例如所需的剥离强度、实现3D形状的概率、待填充间隙的尺寸等,适当地选择所述压敏粘合层的厚度,但本发明并不特别局限于此。
为了在使用所述胶带之前保护所述压敏粘合层,该胶带还可以包括粘贴在压敏粘合层上的剥离片(release sheet)。
本发明的另一方面旨在提供一种填充间隙的方法。一种示例性的方法可以是对第一基板和与所述第一基板间隔开来的第二基板之间所形成的间隙进行填充的方法。例如,所述方法可以包括:将溶胀胶带的压敏粘合层粘贴在第一基板或第二基板上,和通过使该溶胀胶带的基底层与流体接触而使该基底层在纵向上变形(例如溶胀)。
对于在上述方法中形成间隙的第一基板和第二基板的具体种类和形状没有特殊限制。换句话说,所述第一基板和第二基板的种类可以包括各种可以形成待填充间隙且可以将流体引入该间隙中的基板。
另外,对于基板的形状没有特殊限制,但所述基板可以例如包括具有弯曲或不规则形状以及如图1中所示的平面形状的基板。根据一个示例性实施方案,在所述第一基板和第二基板之间所形成间隙的宽度可以为约0.001mm至2.0mm、0.001mm至1.00mm或0.01mm至0.5mm,但本发明并不局限于此。
如图1中所示,所述方法可以通过如下步骤进行:在胶带101通过压敏粘合层而粘贴在形成间隙的第一基板103和第二基板104中一个之上的状态下,使基底层与流体接触,通过溶胀而形成具有3D形状的胶带102。
根据一个示例性实施方案,上述方法中所使用的第一基板和第二基板中的任何一个都可以是用于电池的电极组件,另一个可以是收纳该组件的壳体;且与胶带接触的流体可以是电池中含有的电解液。
在这种情况下,例如,所述方法可以以如下方法进行:将胶带粘贴在电极组件上,将该电极组件收纳于壳体内,然后将电解液注入该壳体中。
所述电极组件的具体种类可以包括任何用于本领域中的普通组件,但本发明并不特别局限于此。根据一个示例性实施方案,所述电极组件可以是用于二次电池,例如锂二次电池的电极组件。
所述电极组件可以包括正极板、负极板、以及在所述正极板和负极板之间形成的隔板,并且在上述方法中可以使用压敏粘合层作为介体,将溶胀胶带粘贴在电极组件的外围表面上。在某些情况下,电极组件可以盘绕成卷状(jellyroll shape)。
所述正极板可以包括由具有优异传导性的金属片等所组成的正极集电器;以及涂布在该正极集电器表面上的正极活性材料层。另外,可以在正极板的两个末端处形成没有用正极活性材料涂布的区域,并可以将由电极组件上部或底部以预定长度突出的正极片粘贴至上述区域。所述正极片可以起到将电极组件与电池的其它部件电子地电子连接的作用。
另外,所述负极板可以包括由导电金属片等所组成的负极集电器;以及涂布在该负极集电器表面上的负极活性材料层。另外,像正极板一样,可以在负极板的两个末端处形成没有用负极活性材料涂布的区域,并可以将由电极组件上部或底部以预定长度突出且能够使电极组件和电池的其它部件进行电子连接的负极片粘贴至上述区域。
另外,为了防止与盖组件或圆柱形壳体的接触,所述电极组件还可以包括在上部和/或底部形成的绝缘板。
由于所述溶胀胶带包括一个封闭部分,电极组件外围表面的隔板的最外端位于该封闭部分中,因此该溶胀胶带可以粘贴在电极组件上以包围该电极组件的外围表面。另外,可以粘贴所述溶胀胶带至覆盖电极组件外围表面的总面积的至少30%。在这种情况下,可以对电极组件外围表面的上端部分和底端部分进行粘贴,使得该电极组件可以暴露于外部环境中。
收纳所述电极组件的壳体的种类可以包括,例如,本领域中已知的圆柱形壳体等,但本发明并不特别局限于此。
另外,根据电池的种类,所述电解液——能够使所述胶带变形(例如溶胀)的流体——的种类可以包括本领域中已知的电解液,但本发明并不特别局限于此。例如,当所述电池为锂二次电池时,电解液可以包括例如水不溶性有机溶剂和锂盐。可以将上述锂盐溶解在有机溶剂中以用作电池中的锂离子源,且可以加速锂离子在正极和负极之间的移动。作为支持电解质盐,所述锂盐的实例可以是包括LiPF6、LiBF4、LiSbF6、LiAsF6、LiCF3SO3、LiN(CF3SO2)3、Li(CF3SO2)2N、LiC4F9SO3、LiClO4、LiAlO4、LiAlCl4、LiN(CxF2x+1SO2)(CyF2y+1SO2)(在此,x和y为自然数)、LiCl、LiI、二草酸硼酸锂等中的一种、两种或更多种的锂盐。所述锂盐在电解液中的浓度可以根据其应用而改变,且通常可以在0.1M至2.0M的范围内。另外,所述有机溶剂可以用作能够使参与电池的电化学反应的离子进行移动的介质,上述有机溶剂的实例可以包括以下中的一种、两种或多种:苯、甲苯、氟苯、1,2-二氟苯、1,3-二氟苯、1,4-二氟苯、1,2,3-三氟苯、1,2,4-三氟苯、氯苯、1,2-二氯苯、1,3-二氯苯、1,4-二氯苯、1,2,3-三氯苯、1,2,4-三氯苯、碘苯、1,2-二碘苯、1,3-二碘苯、1,4-二碘苯、1,2,3-三碘苯、1,2,4-三碘苯、氟甲苯、1,2-二氟甲苯、1,3-二氟甲苯、1,4-二氟甲苯、1,2,3-三氟甲苯、1,2,4-三氟甲苯、氯甲苯、1,2-二氯甲苯、1,3-二氯甲苯、1,4-二氯甲苯、1,2,3-三氯甲苯、1,2,4-三氯甲苯、碘甲苯、1,2-二碘甲苯、1,3-二碘甲苯、1,4-二碘甲苯、1,2,3-三碘甲苯、1,2,4-三碘甲苯、R-CN(其中,R为含有2至50个碳原子的直链、支链或环状结构的烃自由基,其中所述烃自由基可以包含双键、芳环或醚键等)、二甲基甲酰胺、乙酸二甲酯、二甲苯、环己烷、四氢呋喃、2-甲基四氢呋喃、环己酮、乙醇、异丙醇、碳酸二甲酯、碳酸甲乙酯、碳酸二乙酯、碳酸甲丙酯、碳酸丙烯酯、丙酸甲酯、丙酸乙酯、乙酸甲酯、乙酸乙酯、乙酸丙酯、二甲氧基乙烷、1,3-二氧戊环、二甘醇二甲醚、四甘醇二甲醚、碳酸乙烯酯、碳酸丙烯酯、γ-丁内酯、环丁砜、戊内酯、癸内酯(decanolide)或甲瓦龙酸内酯,但本发明并不局限于此。
在溶胀胶带上形成了相对于具有如上所述变形性质(例如溶胀性质)的基底层具有预定剥离强度的压敏粘合层。因此,例如,在将所述胶带粘贴于电极组件上的状态下,该胶带在经过上述方法之后可以实现3D形状。结果是,所述胶带可以有效填充电极组件与壳体的内壁之间的间隙并固定电极组件,从而防止移动或震动。
换句话说,所述溶胀胶带的“3D形状”可以通过与电解液接触的溶胀胶带的基底层的变形能力与压敏粘合层的剥离强度之间的相互作用而形成,并且其概念可以包括能够将电极组件稳固地固定于壳体内部的任意结构。
图3为由上述方法制造的示例性电池的示意图,其显示了溶胀胶带51a和51b通过电解液形成3D形状,从而可以将电极组件53固定在壳体52内。
例如,如示例性的图3左示意图中所示,在将溶胀胶带51a与组件53粘贴后插入壳体52中时,该胶带可以保持平面形状。然而,在与注入壳体52中的电解液进行相当长时间的接触后,如图3右示意图中所示例性地显示的,溶胀胶带53b可以形成3D形状,从而可以填充电极组件53与壳体52之间的间隙,并固定电极组件53。
有益效果
本发明的溶胀胶带可以例如应用于含有流体的间隙中,以实现3D形状从而填充间隙,并且在必要时可以用于对形成间隙的对象进行固定。
附图说明
图1为显示了溶胀胶带形成3D形状的过程的示意图;
图2为显示了溶胀胶带的示意图;
图3为显示了在制造电池的过程中,溶胀胶带形成3D形状的过程的示意图。
具体实施方式
在下文中,将参照实施例和比较例更详细地描述本发明的溶胀胶带,但所述溶胀胶带的范围并不局限于下面的实施例。
如下所述,通过下面的方法对实施例和比较例中的物理性质进行评估。
1.基底层纵向应变的测量
将基底层切割成10mm宽、50mm长以制备样品。将所制样品浸渍在基于碳酸盐的电解液中,然后以密封状态于室温下保持1天。然后,将样品从电解液中移出;测量该样品的高度;然后基于下面的等式A测量所述基底层在纵向上的应变:
[等式A]
纵向应变=(L2-L1)/L1×100
在等式A中,L1为基底层在浸渍于电解液中之前,该基底层在纵向上的初始长度,即50mm;L2为基底层在浸渍于电解液中之后,该基底层在纵向上的长度。
2.溶胀胶带剥离强度的测量
将溶胀胶带切割成25mm宽、200mm长以制备样品。使用2kg的橡胶辊将样品通过压敏粘合层粘贴在玻璃板上,然后在室温下保存2小时。然后,使用拉伸试验机,在以5mm/sec的剥离速度和180°的剥离角剥离溶胀胶带的同时测量剥离强度。
3.通过溶胀胶带实现3D形状的概率评价
将实施例和比较例中制造的电池在室温下保存1天,然后拆解以取出电极组件。按照下面的标准,通过评估粘贴于电极组件上的溶胀胶带的状况来评价实现3D形状的概率:
<实现3D形状的概率的评价标准>
○:观察到溶胀胶带的3D形状。
△:未观察到溶胀胶带的3D形状。
×:未观察到溶胀胶带的3D形状且胶带自电极组件上剥落。
4.溶胀胶带填充间隙的能力(防止电极组件移动的能力)评价
溶胀胶带填充间隙的能力,可以采用评估防止电极组件移动的性能的方法来进行测量。例如,上述方法包括评估残余振动的方法和评估残余冲击的方法。评估残余振动的方法按照UN38.3标准的振动试验进行,并且当在评估后检测不到电池的电源时,判定终端通过移动而断开连接。对于评估残余冲击的方法,当将电池加入八角形柱体中并旋转后,在固定时间内检测不到电池的电源时,判定终端通过移动而断开连接。按照下面的标准,对如上所述进行评估的溶胀胶带填充间隙的能力进行评价:
<填充间隙的能力评价标准>
○:在残余振动和残余冲击的评价后测量到电池电源。
△:在残余振动和残余冲击的评价后测量到电池电源,但电阻率增加10%或大于10%。
×:在残余振动和残余冲击的评价后未测量到电池电源。
制备例1.基于聚氨酯的基底层的制备
使用T型模头,用包含丁二醇多元醇和二苯基甲烷-4,4′-二异氰酸酯的组合物形成厚度为约40μm的膜,所述组合物中多元醇的羟基与二异氰酸酯的异氰酸酯基的当量比为约1:1,然后固化该膜制造出基底。所制得的基底在纵向上的应变为约100%。
制备例2.基于聚氨酯丙烯酸的基底层的制备
将40重量份的聚氨酯丙烯酸酯和70重量份的作为稀释剂的丙烯酸异冰片酯(IBOA)进行混合后,再加入0.5重量份的光引发剂(Irgacure-184,1-羟基环己基苯甲酮),混合并消泡,制得组合物。使用棒式涂布机将所制得的组合物涂布在聚酯剥离膜上至厚度为约40μm。为了防止与氧接触,将所述聚酯剥离膜覆盖在涂层上,然后使用金属卤化物灯,通过用UV-A区光以800mJ/cm2的辐射强度照射而固化上述组合物,制造出基底层。所制得的基底层在纵向上的应变为约43%。
制备例3.基于环氧丙烯酸的基底层的制备
将60重量份的环氧丙烯酸酯、38重量份的IBOA和2重量份的丙烯酸进行混合后,再加入1.2重量份的光引发剂(Irgacure-184,1-羟基环己基苯甲酮),混合并消泡,制得组合物。使用棒式涂布机将所制得的组合物涂布在聚酯剥离膜上至厚度为约40μm。为了防止与氧接触,将所述聚酯剥离膜覆盖在涂层上,然后使用金属卤化物灯,通过用UV-A区光以800mJ/cm2的辐射强度照射而固化上述组合物,制造出基底层。所制得的基底层在纵向上的应变为约11%。
制备例4.基于纤维素的基底层的制备
使用T型模头,将包含由GPC测得数均分子量(Mn)为70,000的乙酸丙酸纤维素化合物的原料模制成厚度为约40μm的基底层。所制得的基底层在纵向上的应变为约20%。
实施例1.
溶胀胶带的制造
通过以下方法制得溶胀胶带:在制备例1中制备的基于聚氨酯的基底层(厚度为40μm)的一个表面上,形成与异氰酸酯交联剂交联的、厚度为15μm且对于玻璃板的剥离强度为1,900gf/25mm的压敏粘合层,作为包含丙烯酸粘合树脂的基于丙烯酸的压敏粘合层。
电极组件和电池的制造
粘贴溶胀胶带,以覆盖卷状电极组件(横截面直径为17.2mm)外围表面的约50%,其中所述电极组件包括负极、正极和隔板,然后将该电极组件插入圆柱形壳体(横截面直径为17.5mm)中。接下来,将基于碳酸盐的电解液注入所述壳体内,然后密封该壳体,完成电池的制造。
实施例2至4以及比较例1和2
除了如下表1中所示地改变基底层,并使用基于与实施例1中相同组合物的压敏粘合层;但在制造溶胀胶带时如下表1中所示地改变压敏粘合层对于玻璃的剥离强度以外,以与实施例1中的相同方式制造溶胀胶带和电池。
[表1]
对以上实施例和比较例测得的物理性质归纳并列于下表2中。
[表2]
<符号说明>
103,104:形成间隙的对象
101:实现3D形状之前的溶胀胶带
102:实现3D形状的溶胀胶带
2:溶胀胶带
201:基底层
202:粘合层
51a、51b:溶胀胶带
52:壳体
53:电极组件
Claims (14)
1.一种填充间隙用溶胀胶带,包括:
基底层,所述基底层在与流体接触时在纵向上变形,且包含氨基甲酸酯键、酯键或醚键,或者包含纤维素酯化合物;以及
压敏粘合层,所述压敏粘合层以平行于所述基底层的纵向的方向在该基底层的一个表面上形成。
2.根据权利要求1所述的溶胀胶带,其中,当所述基底层与流体接触时,以垂直于纵向的方向形成高度为0.001mm至2.0mm的三维(3D)结构。
3.根据权利要求1所述的溶胀胶带,其中,根据下面的等式1,所述基底层在纵向上的应变为至少10%:
[等式1]
纵向应变=(L2-L1)/L1×100
其中,L1为在所述基底层与所述流体接触前该基底层的初始长度;
L2为在室温或60℃下所述基底层与所述流体接触24小时后测得的该基底层的长度。
4.根据权利要求1所述的溶胀胶带,其中,所述基底层为包含能量射线可聚合丙烯酸酯化合物和自由基可聚合稀释剂的组合物的浇铸层。
5.根据权利要求4所述的溶胀胶带,其中,所述能量射线可聚合丙烯酸酯化合物为聚氨酯丙烯酸酯、环氧丙烯酸酯、聚酯丙烯酸酯或聚醚丙烯酸酯。
6.根据权利要求4所述的溶胀胶带,其中,所述自由基可聚合稀释剂包括选自(甲基)丙烯酸烷基酯、含烷氧基的(甲基)丙烯酸酯、含脂环基的(甲基)丙烯酸酯、含芳基的(甲基)丙烯酸酯、含杂环的(甲基)丙烯酸酯和多官能丙烯酸酯中的至少一种。
7.根据权利要求4所述的溶胀胶带,其中,所述组合物包含30重量份至99重量份的所述活性能量射线可聚合丙烯酸酯化合物和1重量份至70重量份的所述自由基可聚合稀释剂。
8.根据权利要求1所述的溶胀胶带,其中,所述基底层包含热塑性聚氨酯。
9.根据权利要求1所述的溶胀胶带,其中,所述基底层为包含多元醇和异氰酸酯化合物的组合物的浇铸层。
10.根据权利要求1所述的溶胀胶带,其中,所述基底层包含乙酸纤维素树脂或纤维素烷基化物树脂。
11.根据权利要求1所述的溶胀胶带,其中,所述压敏粘合层在室温下对于玻璃板或任意一种形成间隙的对象的剥离强度为100gf/25mm或大于100gf/25mm,所述剥离强度在5mm/sec的剥离速度和180°的剥离角下测得。
12.根据权利要求1所述的溶胀胶带,其中,所述压敏粘合层包含丙烯酸压敏粘合剂、聚氨酯压敏粘合剂、环氧压敏粘合剂、硅压敏粘合剂或橡胶压敏粘合剂。
13.一种填充间隙的方法,所述间隙由第一基板和与该第一基板间隔开来的第二基板形成,包括:
将根据权利要求1所述的溶胀胶带的压敏粘合层粘贴在所述第一基板或所述第二基板上;和
通过使所述溶胀胶带的基底层与流体接触而使该基底层在纵向上变形。
14.根据权利要求13所述的方法,其中,所述第一基板和所述第二基板中的一个为电极组件,另一个为收纳该组件的壳体。
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CN201280006873.2A Active CN103339781B (zh) | 2011-01-27 | 2012-01-27 | 电极组件 |
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