CN104837943A - 粘结带 - Google Patents

粘结带 Download PDF

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CN104837943A
CN104837943A CN201380064335.3A CN201380064335A CN104837943A CN 104837943 A CN104837943 A CN 104837943A CN 201380064335 A CN201380064335 A CN 201380064335A CN 104837943 A CN104837943 A CN 104837943A
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CN104837943B (zh
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李在晃
金章淳
张爱定
金志惠
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LG Chem Ltd
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Abstract

提供一种粘结带，其依次包括第一粘结层、密度为约0.1g/cm3至约0.5g/cm3的聚氨基甲酸乙酯发泡层、第二粘结层。

Description

粘结带
技术领域
本发明涉及一种粘结带。
背景技术
在电气产业或电子产业，粘合或固定部件是重要的问题，特别是将两个以上刚性原材料或部件相互接合存在很多困难。
作为刚性原材料或部件的粘合方案，例如有在显示器的触控面板的玻璃等刚性材料上附着聚碳酸酯边缘的情况。
像这样，在粘合刚性原材料或部件之间时，可以在粘结带的两面层叠各原材料或部件，并借助粘结带进行接合。
发明内容
本发明要解决的技术问题
本发明的一实例提供一种用于粘合电视机(TV)边缘来提高耐久性的粘结带。
技术方案
本发明的一实例提供粘结带，其特征在于，依次包括第一粘结层、密度为约0.1g/cm3至约0.5g/cm3的聚氨基甲酸乙酯发泡层、第二粘结层。
上述聚氨基甲酸乙酯发泡层的压缩强度可以为约100gf/in2至约2000gf/in2。
上述聚氨基甲酸乙酯发泡层的拉伸强度可以为约2kgf/in2至约20kgf/in2。
上述粘结带在约80℃温度下的剪切强度可以为约0.3kg/cm2至约1.0kg/cm2。
上述聚氨基甲酸乙酯发泡层的厚度可以为约0.2mm至约5.0mm。
上述粘结层可以包含选自由丙烯酸类粘结剂、橡胶类粘结剂、硅酮类粘结剂及它们的组合组成的组中的至少一种。
上述粘结带可以用于附着电视机边缘。
上述粘结带的宽度可以为约1mm至约7mm。
有益效果
上述粘结带用于粘合电视机边缘，防止弯曲现象及脱离，从而抑制漏光现象，并提高耐久性。
具体实施方式
以下，详细说明本发明的实施例。这些例子只不过是作为例示而提出的，本发明不局限于此，本发明只根据发明保护范围而定义。
本发明的一实施例提供粘结带，其依次包括第一粘结层、密度为约0.1g/cm3至约0.5g/cm3的聚氨基甲酸乙酯发泡层及第二粘结层。
上述粘结带包括具有上述范围的密度的软性聚氨基甲酸乙酯发泡层，赋予应力缓冲特性。
具体地，上述聚氨基甲酸乙酯发泡层的压缩强度可以为约100gf/in2至约2000gf/in2，并且，上述聚氨基甲酸乙酯发泡层的拉伸强度可以为约2kgf/in2至约20kgf/in2。
上述聚氨基甲酸乙酯发泡层可以包括平均直径为50微米至200微米的气孔。
上述粘结带适用为用于附着电子部件的介质，如上所述，具有应力缓冲特性，因此用于附着嵌槽(bezel)宽度窄的电视机边缘时有益。
作为粘合对象的两个物质之间在高温条件下的膨胀率不同的情况下，发生弯曲现象、脱离等问题，如上所述，上述粘结带由于应力缓冲特性优秀，因而能够抑制这种问题。例如，将聚碳酸酯材料的电视机边缘粘合到玻璃板的情况下，向玻璃板的反方向弯曲，进而发生脱离，结果引起漏光现象。将上述粘结带用于附着电视机边缘，能够抑制弯曲现象、脱离等，存在能够提高耐久性并抑制漏光现象的优点。
如上所述，上述粘结带的应力缓冲特性优秀，因而用于附着电视机边缘时，无需防止脱离所需的高水平的高温剪切强度。具体地，上述粘结带在约80℃温度下的剪切强度可以是约0.3kg/cm2以上水平，具体为约0.4kg/cm2至越1.0kg/cm2。
上述聚氨基甲酸乙酯发泡层可通过公知的方法制备，如，在聚氨基甲酸乙酯树脂包含热膨胀性微粒子，并进行发泡，来制备出发泡体。
上述聚氨基甲酸乙酯发泡层的厚度可以为约0.2mm至约5.0mm。聚氨基甲酸乙酯发泡层的厚度在上述范围的情况下，可以赋予预定的应力缓冲特性，例如适合用于附着电视机边缘。
上述第一粘结层及上述第二粘结层例如可以适用丙烯酸类粘结剂、橡胶类粘结剂、硅酮类粘结剂或者它们的组合来制备，可以任意使用公知的粘结剂。
具体地，上述第一粘结层及上述第二粘结层可以具有上述范围的高温剪切强度。可通过调节粘结剂的固化程度来实现高温剪切强度。
如上所述，上述粘结带的应力缓冲特性优秀，因而在用于粘合嵌槽宽度窄的电视机边缘时也能够实现优秀的耐久性，并抑制漏光现象。具体地，上述粘结带用于嵌槽宽度窄的电视机边缘时，宽度可以是约1mm至约7mm。
以下，记载本发明的实施例及比较例。但是以下实施例只是本发明的一个实施例，本发明不局限于以下实施例。
实施例
<实施例1>
在利用上述丙烯酸类粘结剂形成了第一粘结层的离型纸上涂敷用于形成聚氨基甲酸乙酯发泡层的组合物，并进行固化，形成厚度为1.5mm的软性聚氨基甲酸乙酯发泡层。上述软性聚氨基甲酸乙酯发泡层的密度为0.2g/cm3、压缩强度(Textureanalysis,stable micro systems)为980gf/in2、拉伸强度(Texture analysis,stable microsystems)为9.1kgf/in2。接着，在上述聚氨基甲酸乙酯发泡层的上部将丙烯酸类粘结剂组合物涂敷50μm厚度后干燥并固定化，来形成第二粘结层，之后层叠经离型处理的聚对苯二甲酸乙二醇酯(PET)来制备粘结带。
<实施例2>
利用橡胶类粘结剂组合物来替代实施例1中使用的粘合剂丙烯酸类组合物，来形成粘结剂。上述橡胶类粘结剂组合物是对苯乙烯-异戊二烯-苯乙烯(styrene-isoprene-styrene，SIS)类线性嵌段共聚物利用甲苯溶剂来制备的固体成分为20重量份％的浆(syrup)。在此，相对于100重量份的橡胶，添加80重量份的用于提高粘结物性的粘合增进剂，并搅拌一个小时后，在常温下脱泡。涂敷于硅酮离型聚对苯二甲酸乙二醇酯(PET)后，在80度烘箱里干燥一分钟，在110度烘箱里干燥两分钟，来形成第一粘结层。
接着，利用与上述实施例1相同的方法形成聚氨基甲酸乙酯发泡层，并利用上述橡胶类粘结剂组合物来形成第二粘结层，由此制备出粘结带。
<比较例1>
除了制备出聚氨基甲酸乙酯发泡层的密度为0.6g/cm3、压缩强度为2890gf/in2、拉伸强度为28.28kgf/in2的硬性聚氨基甲酸乙酯发泡层之外，按照与上述实施例1相同的方法制备出粘结剂组合物，来形成第一粘结层及第二粘结层，由此制备出粘结带。
<比较例2>
除了形成聚乙烯(PE)发泡层来替代聚氨基甲酸乙酯发泡层之外，按照与实施例1相同的方法制备出粘结带。
<比较例3>
除了形成聚丙烯酸发泡层来替代聚氨基甲酸乙酯发泡层之外，按照与上述实施例2相同的方法制备出橡胶类粘结剂组合物，来形成第一粘结层及第二粘结层，由此制备出粘结带。
评价
实验例1：高温剪切强度
以1cm×1cm的大小准备实施例1至实施例2及比较例1至比较例3的粘结带，将各个粘结带的两面分别附着在玻璃面及聚碳酸酯面后，放进高温腔室，并在80℃温度下保持30分钟后测定出剪切强度。
实验例2：漏光及脱离评价
将实施例1至实施例2及比较例1至比较例3的粘结带裁剪成5mm，将宽度为5mm的聚碳酸酯边缘附着于55英寸的电视机的玻璃板的上部并固定。接着，将附着了上述边缘的电视机放进60℃的烘箱并放置240小时后，根据以下基准观察是否发生漏光及脱离，并将该评价结果记载到表1。
<漏光评价基准>
○：不发生漏光现象
×：发生漏光现象
<脱离评价基准>
○：不发生脱离
×：发生脱离
表1
如表1所示，实施例1至实施例2的光学用粘结膜的漏光评价及脱离评价都优秀，能够确认耐久性优秀。

Claims (8)

1.一种粘结带，其特征在于，依次包括第一粘结层、密度为0.1g/cm3至0.5g/cm3的聚氨基甲酸乙酯发泡层以及第二粘结层。
2.根据权利要求1所述的粘结带，其特征在于，所述聚氨基甲酸乙酯发泡层的压缩强度为100gf/in2至2000gf/in2。
3.根据权利要求1所述的粘结带，其特征在于，所述聚氨基甲酸乙酯发泡层的拉伸强度为2kgf/in2至20kgf/in2。
4.根据权利要求1所述的粘结带，其特征在于，所述粘结带在80℃温度下的剪切强度为0.3kg/cm2至1.0kg/cm2。
5.根据权利要求1所述的粘结带，其特征在于，所述聚氨基甲酸乙酯发泡层的厚度为0.2mm至5.0mm。
6.根据权利要求5所述的粘结带，其特征在于，所述粘结层至少包含选自由丙烯酸类粘结剂、橡胶类粘结剂、硅酮类粘结剂及它们的组合组成的组中的一种。
7.根据权利要求1所述的粘结带，其特征在于，所述粘结带用于附着电视机边缘。
8.根据权利要求1所述的粘结带，其特征在于，所述粘结带的宽度为1mm至7mm。
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