CN105765022A - 表现出改进的可返工能力的双面带涂层的胶带 - Google Patents

表现出改进的可返工能力的双面带涂层的胶带 Download PDF

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CN105765022A
CN105765022A CN201480064091.3A CN201480064091A CN105765022A CN 105765022 A CN105765022 A CN 105765022A CN 201480064091 A CN201480064091 A CN 201480064091A CN 105765022 A CN105765022 A CN 105765022A
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CN105765022B (zh
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李夏荣
曹道光
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3M Innovative Properties Co
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Abstract

本发明提供具有改进的可返工能力的双面带涂层的胶带，其中第一粘合剂层、膜载体层、泡沫载体层和第二粘合剂层依次层叠，并包括泡沫载体层与第二粘合剂层之间热塑性聚氨酯(TPU)膜。由于双面带涂层的胶带用于将LCD面板粘合到框架，同时提供改进的漏光性能和可返工能力，因此在制造诸如电视、手机和计算机等电子设备时优选地使用双面带涂层的胶带。

Description

表现出改进的可返工能力的双面带涂层的胶带
技术领域
本发明涉及一种双面带涂层的胶带，其在电子产品诸如电视、手机和计算机的制造中表现出改进的可返工性，特别适合用于液晶显示屏(LCD)面板的粘合。
背景技术
双面带涂层的胶带(或双面带涂层的粘合胶带)在诸如电视等电子产品的制造中已有效用于组成部件的粘合，近年来，此类电子产品的性能和质量都已提高，具有更薄面板的产品越来越受到人们的青睐，因此需要用于将液晶显示屏(LCD)面板附接到导向架以具有很强粘合性的双面带涂层的胶带。图1示出了利用双面带涂层的胶带10将LCD面板20附接到导向架30的结构系统的横截面。
另外，当用于附接LCD面板的双面带涂层的胶带变硬时，应力直接传输到LCD并破坏LCD的排列，从而导致漏光(LCD屏幕变得有斑点的情况)。因此，目前使用的双面带涂层的胶带除了包括由膜形成的基材(例如，膜载体)之外，还包括由具有孔隙率的泡沫形成的基材(例如，泡沫载体)。由于泡沫基材由软质材料而不是刚性材料形成，因此包括泡沫基材的双面带涂层的胶带可有效防止LCD面板漏光。图2示出了包括泡沫基材的常规双面带涂层的胶带的剖视图。如图2所示的常规双面带涂层的胶带包括复合基材，该复合基材包括膜载体层1和泡沫载体层2，以及形成于复合基材的两个面上的第一粘合剂层3和第二粘合剂层3’，上述所有层均层叠在一起。
同时，当丢弃在制造此类电子产品的过程期间形成的缺陷产品时，遇到的问题不仅包括资源消耗和环境污染，还包括经济损失增大。因此，缺陷产品应按组成元素分类和再利用(回收)，以降低消费者的成本。
尤其是，应在LCD面板在质量低劣时进行分类和回收的另一个原因是，LCD面板非常昂贵。尽管如此，由于双面带涂层的胶带的粘合剂具有很强的粘合强度和较差的泡沫载体特性，因此在去除时，双面带涂层的胶带的粘合剂并没有从LCD面板的表面完全去除干净，造成不能再利用(回收)LCD面板。
因此，为了将附接的双面带涂层的胶带的粘合剂从LCD面板的表面去除干净，人们做了大量尝试，包括改变设置在双面带涂层的胶带两个表面上的第一粘合剂层和第二粘合剂层的剪切强度。然而，迄今为止，尚未出现表现出足够物理特性以提供可返工性并防止漏光的双面带涂层的胶带。
发明内容
本发明涉及一种双面带涂层的胶带，其表现出改进的可返工性并能有效防止漏光，尤其是当双面带涂层的胶带在如电视、计算机和手机等电子产品的制造中用于附接液晶显示屏(LCD)面板时。
根据本公开的一个方面，提供包括依次层叠的第一粘合剂层、膜载体层、泡沫载体层和第二粘合剂层的双面带涂层的胶带，其中双面带涂层的胶带包括形成于泡沫载体层与第二粘合剂层之间的聚氨酯膜。
根据本公开的另一个方面，提供包括双面带涂层的胶带的电子产品。
本发明的效果
根据本公开的双面带涂层的胶带可用于向昂贵的LCD面板提供改进的可返工性并通过将施加到LCD上的应力最小化来有效地防止漏光，因为双面带涂层的胶带可通过在相对于双面带涂层的胶带粘合表面的竖直方向、倾斜方向和水平方向上施加的力而从对象的表面轻松剥离。因此，根据本发明的双面带涂层的胶带在诸如电视、手机和计算机等电子产品的制造中可用于附接LCD面板。
附图说明
本公开的上述和其他目的、特征和优点通过参考附图详细地描述其示例性实施方案对于本领域的技术人员将是更显而易见的，其中：
图1是示出利用双面带涂层的胶带将LCD面板附接到导向架的结构系统的截面的示意图；
图2是包括泡沫基材的常规双面带涂层的胶带的剖视图；并且
图3至5是根据本发明各种实施方案的双面带涂层的胶带的剖视图。
附图中主要部件的简要说明
10：双面带涂层的胶带
20：液晶显示屏(LCD)面板
30：导向架
1：膜载体层
2：泡沫载体层
3：第一粘合剂层
3’：第二粘合剂层
3”：第三粘合剂层
4：聚氨酯膜
具体实施方式
下面将参考附图详细描述本公开的示例性实施方案。虽然本发明结合本发明的示例性实施方案示出并描述，但对于本领域的技术人员而言，显而易见可在不脱离本发明范围的情况下做出多种修改。
除非另外特别说明，在本说明书中使用的所有技术和科学术语具有与由本发明所属相关领域的技术人员一般理解的相同含义。一般来讲，用于本说明书的命名和下面描述的实验方法已广泛知晓，并且一般用于相关领域。
根据本公开的双面带涂层的胶带具有第一粘合剂层、膜载体层、泡沫载体层、聚氨酯膜和第二粘合剂层依次层叠的特征结构。双面带涂层的胶带可还包括位于膜载体层与泡沫载体层之间的第三粘合剂层。双面带涂层的胶带可还包括位于泡沫载体层与聚氨酯膜之间的第三粘合剂层。
当利用双面带涂层的胶带将LCD面板附接到导向架时，第一粘合剂层可以与导向架接触，第二粘合剂层可以与LCD面板接触。
图3至图5中示出了根据本公开各种实施方案的双面带涂层的胶带的剖视图。图3所示的双面带涂层的胶带共由5层构成，即，第一粘合剂层3、膜载体层1、泡沫载体层2、聚氨酯膜4和第二粘合剂层3’，它们依次层叠。图4所示的双面带涂层的胶带共由6层构成，即，第一粘合剂层3、膜载体层1、第三粘合剂层3”、泡沫载体层2、聚氨酯膜4和第二粘合剂层3’，它们依次层叠。图5所示的双面带涂层的胶带共由6层构成，即，第一粘合剂层3、膜载体层1、泡沫载体层2、第三粘合剂层3”、聚氨酯膜4和第二粘合剂层3’，它们依次层叠。
第一粘合剂层3、膜载体层1、泡沫载体层2、聚氨酯膜4、第二粘合剂层3’和第三粘合剂层3”的厚度分别为10至150微米(μm)、10至150μm、200至3000μm、15至300μm、10至150μm和10至150μm；优选地分别为40至120μm、20至100μm、1000至2500μm、15至250μm、40至120μm和40至120μm；更优选地分别为50至100μm、30至80μm、1200至2000μm、20至250μm、50至100μm和50至100μm。
在下文中，将进一步详细描述构成根据本公开双面带涂层的胶带的各个层。
聚氨酯膜
本公开的示例性聚氨酯膜4设置在泡沫载体层2与第二粘合剂层3’之间，由具有相对较高伸长率同时表现出高拉伸强度和低模量的软质材料形成。由于存在聚氨酯膜，双面带涂层的胶带可以从附接到双面涂层胶带的对象的表面完全剥离，而不会在对象上残留物质，同时起到保持泡沫载体层对粘合表面的剥离强度的效果，以防止在使用时漏光。聚氨酯膜可以是热塑性聚氨酯(TPU)膜。
聚氨酯膜通过加热熔化粘合，可以经受如挤压、真空成型、热粘合和高频等处理工艺。而且，聚氨酯膜可以通过加热熔化并回收。
膜载体层
形成为膜的片材(例如，形成膜的塑性材料)可以用作膜载体层1。
此类塑性材料的具体示例包括：丙烯酸类树脂，诸如聚甲基丙烯酸甲酯(PMMA)；聚酯，如聚对苯二甲酸乙二醇酯(PET)；聚碳酸酯；降冰片烯基树脂；烯烃聚合物；以及三醋酸纤维素(TAC)。塑性材料可单独使用或组合使用。在本公开的一些实施方案中，膜载体1优选地选自具有高透明性的PET膜、黑色不透明膜载体层或它们的组合的至少一种。
泡沫载体层
泡沫载体层2为通过发泡源树脂而获得的多孔片材，可为双面带涂层的胶带赋予优异的抗冲击性并在使用时防止漏光。泡沫载体层2可选自泡沫，诸如聚苯乙烯、聚氨酯、聚氯乙烯、丙烯酸酯、烯烃、橡胶以及这些材料的共混物中的至少一种。
原材料可单独使用或组合使用。在本公开中，泡沫载体2优选地为聚氨酯泡沫载体层。
第一粘合剂层、第二粘合剂层和第三粘合剂层
第一粘合剂层3、第二粘合剂层3’和第三粘合剂层3”可由压敏粘合剂(PSA)组分形成，并且第一粘合剂层3、第二粘合剂层3’和第三粘合剂层3”的组分可以彼此相同或不同。
此类PSA组分的具体示例可包括丙烯酸、硅基、聚酯基、橡胶基以及聚氨酯基聚合物。PSA组分可单独使用或组合使用。在本公开的一些实施方案中，第一粘合剂层3、第二粘合剂层3’和第三粘合剂层3”中的任意一个、几个或全部可优选地包括具有高透明性的丙烯酸聚合物。
丙烯酸聚合物为通过共聚具有1至18个碳原子的(甲基)丙烯酸烷基酯而制备的聚合物，即采用C1-18丙烯酸酯基化合物作为主要单体组分。优选地，本文中可使用具有1,000,000或更大重均分子量的丙烯酸类聚合物。如本文所用，术语“(甲基)丙烯酸酯”是指丙烯酸酯和(甲基)丙烯酸酯聚合物这两者。
C1-18丙烯酸酯基化合物的具体示例可包括(甲基)丙烯酸甲酯、(甲基)丙烯酸乙酯、(甲基)丙烯酸丙酯、(甲基)丙烯酸正丁酯、(甲基)丙烯酸异丁酯、(甲基)丙烯酸2-乙基己基酯、(甲基)丙烯酸正辛酯、(甲基)丙烯酸异辛酯、(甲基)丙烯酸烷酯，(甲基)丙烯酸十八烷酯、(甲基)丙烯酸异壬酯、(甲基)丙烯酸环己酯、(甲基)丙烯酸苄酯、(甲基)丙烯酸甲氧基乙酯、(甲基)丙烯酸乙氧基乙酯以及(甲基)丙烯酸苯氧酯。上述丙烯酸酯基化合物与另一单体(例如，苯乙烯基单体、烯烃单体、乙烯基酯，含氰基基团的单体、含酰胺基团的单体、含羟基基团的单体、含酸性基团的单体、含环氧基团的单体、含氨基基团的单体、含羧基基团的单体等)的共聚物可用于本文。
在本公开的一些实施方案中，本文中使用的第一粘合剂层3和第二粘合剂层3’均具有-20至20℃的玻璃化转变温度。在一些实施方案中，第三粘合剂层3”自身或与第一粘合剂层3和第二粘合剂层3’的组合可具有-20至20℃的玻璃化转变温度。
在一些实施方案中，如有必要，构成根据本公开双面带涂层的胶带的每一层可还包括各种添加剂。可添加如染料、颜料和填料等不会对目前公开的双面带涂层的胶带造成不良影响的添加剂。特别地，可在构成目前公开双面带涂层的胶带的层中包括炭黑或黑色颜料，以便表现出光吸收效率。
目前公开的双面涂层胶带可使用常规方法制造。例如，双面涂层胶带可通过以下步骤制备：(a)(a-1)分别形成膜载体层、泡沫载体层和聚氨酯膜，然后依次将它们层叠；(a-2)通过共挤出同时形成三层层叠的膜载体层、泡沫载体层和聚氨酯膜；或(a-3)通过涂布来在膜载体层上形成泡沫载体层，然后通过涂布来在泡沫载体层上形成聚氨酯膜；以及(b)之后分别在膜载体层和聚合物膜上形成第一粘合剂层和第二粘合剂层。这样得到的双面带涂层的胶带具有如图3所示的结构。
在另一种方法中，双面带涂层的胶带可通过以下步骤制备：(i)在衬件上形成聚氨酯膜，然后在聚氨酯膜上形成泡沫载体层，以制备叠层；(ii)在膜载体层的两面上分别形成第一粘合剂层和第三粘合剂层，形成双面带涂层的胶带；(iii)结合在步骤(i)中制备的叠层与在步骤(ii)中制备的双面带涂层的胶带，使层叠的泡沫载体层粘合到双面带涂层的胶带的第三粘合剂层，以形成层压材料；以及(iv)从在步骤(iii)中形成层压材料中移除衬件，然后在所得层压材料的聚氨酯膜上形成第二粘合剂层。这样得到的双面带涂层的胶带具有如图4所示的结构。
另选地，双面带涂层的胶带可通过以下步骤制备：(1)在膜载体层上形成泡沫载体层，并在膜载体层和泡沫载体层上分别形成第一粘合剂层和第三粘合剂层，形成双面带涂层的胶带；(2)在衬件上形成聚氨酯膜，并在聚氨酯膜上形成第二粘合剂层，以形成叠层；以及(3)从在步骤(2)中形成的叠层中移除衬件，并所得衬件与在步骤(1)中制备的双面带涂层的胶带结合，使所得层叠的聚氨酯膜粘合到双面带涂层的胶带的第三粘合剂层。这样得到的双面带涂层的胶带具有如图5所示的结构。
第一粘合剂层3、第二粘合剂层3’和第三粘合剂层3”中的每个的形成方式可为：分别通过直接在相关层上涂布粘合剂组合物并固化该组合物；或通过在衬件上涂布粘合剂组合物并固化该组合物，然后将固化层层压到相关层上。
在根据本公开的一些实施方案中，双面带涂层的胶带可还包括不会对目前公开双面带涂层的胶带的效果造成不良影响的附加层。
在根据本公开的双面带涂层的胶带中，聚氨酯膜可具有100至1500％的伸长率、0.1至10MPa的模量和0.3至3kgf的断裂负荷；优选地具有200至1000％的伸长率、0.2至7MPa的模量和0.4至2.5kgf的断裂负荷；更优选地具有300至900％的伸长率、0.3至5MPa的模量和0.5至2.0kgf的断裂负荷。
当利用这样制造的双面带涂层的胶带将LCD面板附接到导向架时，则第一粘合剂层可以与导向架接触，第二粘合剂层可以与LCD面板接触。双面带涂层的胶带具有优异的可返工性，因为第二粘合剂层可通过在相对于双面带涂层的胶带的粘合表面的竖直方向、倾斜方向和水平方向上施加的力而轻松剥离。
如上所述，根据本公开的双面带涂层的胶带可向昂贵的LCD面板提供改进的可返工性，并通过将施加到LCD面板上的应力降至最小有效地防止漏光，因为双面带涂层的胶带可从其附接对象的表面轻松剥离。因此，根据本公开的双面带涂层的胶带在诸如电视、手机和计算机等电子产品的制造期间可用于附接LCD面板。
在下文中，将参考以下示例进一步继续详述本发明。然而，应当理解，这里所提议的描述仅仅是为了说明而优选的实施例，并不是为了限制本发明的范围。
实施例1
将用于形成泡沫载体层2的聚氨酯组合物(得自韩国华城市的Gminnotek有限公司(GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GMC-150SSRB))涂布在聚酯膜载体层1(聚对苯二甲酸乙二醇酯膜，得自韩国天安寺的SKC有限公司(SKCCo.,Ltd.(Cheonan-si,Korea)))上，聚酯膜载体层1的厚度为50μm，用刮刀涂布机在其上形成厚度为1500μm的聚氨酯泡沫载体层2。当存在由碳粉、催化剂和表面活性剂组成的添加剂(10重量％)的情况下，将亚甲基二异氰酸酯(30重量％)与乙二醇和二甘醇的混合物(60重量％)进行聚合，制成用于泡沫载体层2的聚氨酯组合物。用刮刀涂布机将用于形成热塑性聚氨酯(TPU)膜4的聚氨酯组合物(得自GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GM-20)涂布在泡沫载体层2上，然后在130℃的温度下以4m/分钟的固化速度固化该聚氨酯组合物，以在其上形成厚度为20μm的TPU膜4。当存在由碳粉、催化剂和表面活性剂组成的添加剂(10重量％)的情况下，将聚合亚甲基二异氰酸酯(30重量％)与聚酯多元醇、聚丙二醇以及聚乙烯乙二醇的混合物(60重量％)进行聚合，制成用于TPU膜的聚氨酯组合物。
将粘合剂(单体(丙烯酸异辛酯:丙烯酸:丙烯酸甲酯＝57.5:35:7.5(重量％))、引发剂(1,1'-(1,3-苯二甲酰)双(2-甲基-氮丙啶)的苯和甲苯溶液)，含25重量％固形物的乙酸乙酯(具有约813000的重均分子量(Mw)和约8200的数均分子量))涂布在工艺衬件(聚对苯二甲酸乙二醇酯膜，得自日本东京的藤森Sangyo有限公司(FujimoriSangyoCo.,Ltd.(Tokyo,Japan)))的FILMBYNA75E-8811DG3/BD)上，以在其上形成厚度为80μm的绕成大卷的粘合剂层。烘箱温度为90℃，并且涂布速度为6m/分钟。
从大卷中分离出粘合剂层，并作为第一粘合剂层3和第二粘合剂层3’在室温、6kgf的压力以及12m/分钟的速度的层压条件下，分别层压到膜载体层1和TPU膜4上，从而得到如图3所示的双面带涂层的胶带。
实施例2
以与实施例1相同的方式制备双面带涂层的胶带，不同的是形成具有的厚度为250μm的TPU膜4。
实施例3
步骤(3-1)
用刮刀涂布机将用于形成TPU膜4的聚氨酯组合物(得自GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GM-20)涂布在厚度为50μm的工艺衬件(聚对苯二甲酸乙二醇酯膜，得自SKCCo.,Ltd.(Cheonan-si,Korea)的SB00)上，在130℃的温度下以4m/分钟的固化速度固化该聚氨酯组合物，以在其上形成厚度为20μm的TPU膜4。用刮刀涂布机将用于形成泡沫载体层2的聚氨酯组合物(得自GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GMC-150SSRB)涂布在TPU膜4上，以形成厚度为1500μm的聚氨酯泡沫载体层2，从而形成叠层。
步骤(3-2)
将粘合剂(单体(丙烯酸异辛酯:丙烯酸:丙烯酸甲酯＝57.5:35:7.5(重量％))、引发剂(1,1'-(1,3-苯二甲酰)双(2-甲基-氮丙啶)的苯和甲苯溶液)，含25重量％固形物的乙酸乙酯(具有约813000的重均分子量(Mw)和约8200的数均分子量))涂布在工艺衬件(聚对苯二甲酸乙二醇酯膜，得自FujimoriSangyoCo.,Ltd.(Tokyo,Japan))的FILMBYNA75E-8811DG3/BD)上，以在其上形成厚度为80μm的绕成大卷的粘合剂层。烘箱温度为90℃，并且涂布速度为6m/分钟。
从大卷中分离出粘合剂层，并作为第一粘合剂层3和第三粘合剂层3’在室温、6kgf的压力以及12m/分钟的速度的层压条件下，分别层压到具有的厚度为50μm的聚酯膜载体层1(聚对苯二甲酸乙二醇酯膜，得自SKCCo.,Ltd.(Cheonan-si,Korea)的SB00)的两个面上，从而制成双面带涂层的胶带。
步骤(3-3)
将在步骤(3-2)中制备的双面带涂层的胶带层压到在步骤(3-1)中制备的叠层上，使得层叠的泡沫载体层2在室温、6kgf的压力和12m/分钟的速度的层合条件下粘合到双面带涂层的胶带的第三粘合剂层3”上，从而形成层合体。
步骤(3-4)
将衬件从步骤(3-3)中形成的层合体的TPU膜4上剥离。从在步骤(3-2)中制备的大卷中分离出粘合剂层，并作为第二粘合剂层3’在室温、6kgf的压力以及12m/分钟的速度的层压条件下，层压到获得的层压材料的TPU膜4上，从而形成如图4所示的双面带涂层的胶带。
实施例4
步骤(4-1)
将用于形成泡沫载体层2的聚氨酯组合物(得自GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GMC-150SSRB)涂布在聚酯膜载体层1(聚对苯二甲酸乙二醇酯膜，得自SKCCo.,Ltd.(Cheonan-si,Korea))上，聚酯膜载体层1的厚度为50μm，用刮刀涂布机形成厚度为1500μm的聚氨酯泡沫载体层2。
将粘合剂(单体(丙烯酸异辛酯:丙烯酸:丙烯酸甲酯＝57.5:35:7.5(重量％))、引发剂(1,1'-(1,3-苯二甲酰)双(2-甲基-氮丙啶)的苯和甲苯溶液)，含25重量％固形物的乙酸乙酯(具有约813000的重均分子量(Mw)和约8200的数均分子量))涂布在工艺衬件(聚对苯二甲酸乙二醇酯膜，得自FujimoriSangyoCo.,Ltd.(Tokyo,Japan))的FILMBYNA75E-8811DG3/BD)上，以形成厚度为80μm的绕成大卷的粘合剂层。烘箱温度为90℃，并且涂布速度为6m/分钟。
从大卷中分离出粘合剂层，并作为第一粘合剂层3和第三粘合剂层3”分别层压到膜载体层1和泡沫载体层2上，从而制成双面带涂层的胶带。
步骤(4-2)
用刮刀涂布机将用于形成TPU膜4的聚氨酯组合物(得自GminnotekCo.,Ltd.(Hwaseong-si,Korea)的GM-20)涂布在厚度为50μm的工艺衬件(聚对苯二甲酸乙二醇酯膜，得自SKCCo.,Ltd.的SB00)上，然后在130℃的温度下以4m/分钟的固化速度在烘箱中固化，以在其上形成具有20μm的厚度的TPU膜4。
从在步骤(4-1)中制备的大卷中分离出粘合剂层，并作为第二粘合剂层3’在室温、6kgf的压力以及12m/分钟的速度的层压条件下，层压到TPU膜4上，从而形成叠层。
步骤(4-3)
将衬件从步骤(4-2)中形成的层叠的TPU膜4上剥离。然后，将所得的叠层层压到在步骤(4-1)中制备的双面带涂层的胶带上，使得叠层的TPU膜4在室温、6kgf的压力和12m/分钟的速度的层合条件下，粘合到双面带涂层的胶带的第三粘合剂层3”上，从而形成如图5所示的双面带涂层的胶带。
比较例1
以与实施例1相同的方式制备双面带涂层的胶带，不同的是使用具有25μm的厚度的聚对苯二甲酸乙二醇酯(PET)膜(得自SKCCo.,Ltd.(Cheonan-si,Korea)的SB00)代替具有20μm的厚度的聚氨酯(TPU)膜。
比较例2
以与实施例1相同的方式制备双面带涂层的胶带，不同的是使用具有50μm的厚度的PET膜。
根据实施例1至4和比较例1和2制备的双面带涂层的胶带的测量物理特性和评估性能如下。结果列于下表1中。
(1)伸长率(％)
根据ASTMD882方法测量所例举双面带涂层的胶带的膜的伸长率(％)。
(2)模量(MPa)
根据ASTMD882方法测量所例举双面带涂层的胶带的膜的模量(MPa)。
(3)断裂负荷(kgf)
根据ASTMD882方法测量所例举双面带涂层的胶带的膜的断裂负荷(kgf)。
(4)防漏光性能
如图1所示，在制造电视的传统工艺中，通过使用双面带涂层的胶带进行粘合工艺制造所需的电视机，使得双面带涂层的胶带的第一粘合剂层与导向架接触，并且第二粘合剂层与LCD面板接触。在这种情况下，由于电视的框非常薄，双面带涂层的胶带没有壳体顶部，因此被应用于LCD面板与导向架之间，以连接LCD面板和导向架。然后，用肉眼在所制造电视的显示屏上观察并评估防漏光性能：○:好，Δ：平均，×：差。
(5)可返工性
双面带涂层的胶带的第一粘合剂层和第二粘合剂层以与(4)防漏光性能测量相同的方式进行附接，使得第一粘合剂层与导向架接触，第二粘合剂层与LCD面板接触，然后再次分离。
分离之后，用肉眼观察并评估LCD面板表面上残留的残余粘合剂量：○:好，Δ：平均，以及×：差。
[表1]
如表1所列，可以看出，根据本公开的实施例1至4制备且在层之间形成有TPU膜的双面带涂层的胶带，与根据用PET膜代替TPU膜的比较例1和2制备的双面带涂层的胶带相比，表现出更柔软的物理特性，如高伸长率、低模量和低断裂负荷。因此，可以确认，根据本公开制备的双面带涂层的胶带能够通过将施加到LCD上的应力最小化来有效地防止漏光，同时向昂贵的LCD面板提供改进的可返工性。

Claims (11)

1.一种双面带涂层的胶带，包括依次层叠的第一粘合剂层、膜载体层、泡沫载体层和第二粘合剂层，其中所述双面带涂层的胶带包括设置在所述泡沫载体层与所述第二粘合剂层之间的聚氨酯膜。
2.根据权利要求1所述的双面带涂层的胶带，其中所述第一粘合剂层、所述膜载体层、所述泡沫载体层、所述聚氨酯膜和所述第二粘合剂层具有的厚度分别为10μm至150μm、10μm至150μm、200μm至3,000μm、15μm至300μm和10μm至150μm。
3.根据权利要求1所述的双面带涂层的胶带，其中所述聚氨酯膜为热塑性聚氨酯(TPU)膜。
4.根据权利要求1所述的双面带涂层的胶带，其中所述膜载体层为聚对苯二甲酸乙二醇酯(PET)载体层。
5.根据权利要求1所述的双面带涂层的胶带，其中所述泡沫载体层为聚氨酯泡沫载体层。
6.根据权利要求1所述的双面带涂层的胶带，还包括位于所述膜载体层与所述泡沫载体层之间的第三粘合剂层。
7.根据权利要求1所述的双面带涂层的胶带，还包括位于所述泡沫载体层与所述聚氨酯膜之间的第三粘合剂层。
8.根据权利要求6所述的双面带涂层的胶带，其中所述第一粘合剂层、所述第二粘合剂层和所述第三粘合剂层为由丙烯酸类聚合物构成的粘合剂层。
9.根据权利要求1所述的双面带涂层的胶带，其中所述聚氨酯膜具有100％至1500％的伸长率、0.1Mpa至10Mpa的模量和0.3kgf至3kgf的断裂负荷。
10.一种电子产品，包括根据权利要求1所述的双面带涂层的胶带。
11.根据权利要求10所述的电子产品，其中所述电子产品为电视、手机或计算机。
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