CN104379692A - 干净释放的拉伸可释放带材 - Google Patents

干净释放的拉伸可释放带材 Download PDF

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CN104379692A
CN104379692A CN201380012656.9A CN201380012656A CN104379692A CN 104379692 A CN104379692 A CN 104379692A CN 201380012656 A CN201380012656 A CN 201380012656A CN 104379692 A CN104379692 A CN 104379692A
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base material
adhesive tape
backing
self adhesive
resin
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R·A·格里斯尔
H·T·芒森
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3M Innovative Properties Co
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Abstract

本发明提供了用于粘结的粘合带，当在粘结平面的方向上被拉伸时，所述粘合带可脱离，而不留下残余并且不损伤基材的表面。粘合带包括：弹性背衬，所述弹性背衬具有相对的第一表面和第二表面；丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面中的至少一个上。所述背衬包含选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物，和基于所述背衬的总重量计约20重量％至60重量％的增粘剂。所述背衬具有大于500％的断裂伸长率。

Description

干净释放的拉伸可释放带材
相关申请的交叉引用
本申请要求2012年3月8日提交的美国临时申请No.61/608,287的权益，其公开内容以引用方式全文并入本文。
技术领域
描述了拉伸可释放的粘合带、包括粘合带的制品和使用粘合带去耦接基材叠堆的方法。
背景技术
已使用拉伸可释放的膜和带材以将基材粘结在一起或者将制品粘结到基材。用于将制品粘结到基材的可商购获得的拉伸释放粘合剂以CommandTM品牌购自3M公司并且以品牌购自德莎公司(tesa SE)。这些拉伸释放带材和膜中的许多包括不含粘合剂的突片部分作为产品构造的部分，从而允许使用者抓取和牵拉带材，从而将其从所附接的表面释放。虽然这些拉伸可释放的膜和带材已为可用的，但仍然有需要提供其它拉伸可释放的制品。
发明内容
本公开提供了拉伸可释放的粘合带、组装了这些带材的制品和粘结这些带材的方法。有利地，本公开的粘合带是拉伸可释放的，而不依赖于突片部分。另外，本公开的拉伸可释放粘合带从它们所附接到的基材干净地去除，而不留下残余并且不损伤基材的表面。
在一个方面，本公开涉及一种粘合带，所述粘合带包括以下部分或基本上由以下部分组成：(a)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含(i)选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物，和(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和(b)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面中的至少一个上，其中当所述制品设置在基材上时，所述制品能够沿第一方向拉伸并从所述基材释放。
在另一方面，本公开涉及一种制品，所述制品包括(a)第一基材；(b)粘附到所述第一基材的粘合带，所述粘合带包括(1)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含(i)选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物；和(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和(2)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面中的至少一个上。
在另一方面，本公开涉及一种耦接和去耦接基材叠堆的方法，所述方法包括以下步骤：(a)提供第一基材和第二基材；(b)在所述第一基材和所述第二基材之间粘附所述粘合带，从而将所述第一基材和所述第二基材耦接成所述叠堆，所述粘合带包括：(1)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含(i)选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物；和(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和(2)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面上，(c)将所述叠堆加热至所述粘合带的软化温度；(d)从所述叠堆去除所述第一基材以暴露所述粘合带；以及(e)将所述粘合带沿其长度牵拉，以将所述粘合带从所述第二基材拉伸释放。
本公开的粘合带可被设置为单侧带，其中粘合剂设置在背衬的一侧上，或者被设置为双侧带，其中粘合剂设置在背衬的两侧上。粘合带可用于各式各样的应用中，范围从消费者电子装置(诸如，移动手持装置，例如，各种类型的电话、平板等)中的组件的组装到
将任何两种基材粘结在一起并随后将一个基材与另一个去耦接。
具体实施方式
除非另外指明，否则本说明书和权利要求书中所使用的表达特征尺寸、量和物理特性的所有数均应理解为在所有情况下均由术语“约”修饰。因此，除非有相反的说明，否则在前述说明书和所附权利要求书中列出的数值参数均为近似值，其可根据本领域中技术人员使用本文所公开的教导内容要寻求获得的所需特性而改变。
由端点表述的数值范围包括该范围内的所有数(如，1至5包括1、1.5、2、2.75、3、3.80、4和5)以及该范围内的任何范围。
在一个方面，本公开提供了表现出拉伸释放特性的粘合带。粘合带包括弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，和设置在第一表面和第二表面中的至少一个上的丙烯酸酯压敏粘合剂。
弹性背衬
合适的弹性背衬包含聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物。可商购获得的聚醚-聚酯共聚物树脂包括购自特拉华州杜邦公司(DuPont，Delaware)的品牌的那些，并且尤其可用的是4056树脂。可商购获得的聚醚-聚酰胺共聚物树脂包括购自宾夕法尼亚州阿克玛公司(Arkema Inc.，Pennsylvania)的PebaxTM品牌的那些，并且尤其可用的是PebaxTM3533树脂。美国专利No.5,672,400(Hansen等人)在第7列第40行至第65行中公开PebaxTM树脂的使用，其整个公开内容以引用方式全文并入。
增粘剂树脂也为弹性树脂的部分。合适的增粘剂树脂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、氧茚树脂、天然树脂松香、改性的松香、甘油酯松香、季戊四醇酯松香、烯丙基酚醛树脂、二甲苯甲醛树脂、苯乙烯树脂、二环戊二烯树脂、以及它们的混合物。基于背衬的总重量计，增粘剂的存在量为20重量％至60重量％。
选择弹性背衬，使其具有用于拉伸释放粘合带中的合适机械特性。例如，选择弹性背衬，使得当在第一方向上(例如，纵向)牵拉时，其可被拉伸(伸长)至少50％而不断裂。即，通过拉伸，至少一个维度(如长度)可增加至少50％而不使背衬层断裂。在一些实施例中，弹性背衬可被拉伸至少100％、至少150％、至少200％、至少300％、至少400％、或至少500％而不断裂。弹性背衬可常常拉伸至多800％。
粘合剂
丙烯酸压敏粘合剂适用于本公开中。当本公开的粘合带以卷筒形式(诸如转移带)供应时，丙烯酸粘合剂通常受衬片保护。
添加剂
其它添加剂可被包括在背衬、粘合剂或二者中，以赋予特定特性。此类添加剂包括有机填料、无机填料、化学或物理发泡剂、抗微生物剂、玻璃或聚合物气泡或球珠(其可膨胀或不膨胀)、纤维、增强剂、疏水性或亲水性二氧化硅、增韧剂、纳米粒子、阻燃剂、抗氧化剂、细磨的聚合物颗粒(诸如聚酯)、尼龙和聚丙烯、以及稳定剂(诸如，热或UV稳定剂)。另外，可添加颜料和/或染料以改变背衬、粘合剂或二者的颜色。有时优选的是产生黑色或白色带材的颜料或染料。
粘合带
粘合带的粘合剂层以及弹性背衬通常为可高度可延展的。牵拉突片导致粘合带伸长或拉伸。拉伸减小了第一基材和第二基材之间的区域中的粘合带的体积，并且促进粘合带从一个基材或两个基材的释放。如果粘合剂层具有足够的结合强度，如果粘合剂层与背衬层的粘附比与基材的粘附更强力，并且如果粘合带可充分伸长以减小其在基材之间的体积而不断裂或绷断回其原始位置或尺寸，则牵拉突片可从两个基材释放粘合剂层。拉伸的粘合带可从两个基材之间去除，两个基材可分离，或上述两者。在拉伸释放条件下，粘合带通常可在第一方向上拉伸至少50％(第一方向常常为纵向的，并且长度可增加至少50％)而不断裂或绷断。
不同于现有技术的拉伸可释放带材，在本发明的粘合带上不需要突片来促进或引发拉伸释放。使用者只是将本公开的粘合带在沿粘结平面的方向上牵拉，以拉伸释放。
当本公开的粘合带被沿主轴拉伸并从基材释放时，先前与粘合剂接触的基材表面的大于90％不含粘合剂残余。优选地，在粘合带沿主轴拉伸并从基材释放之后，基本上无粘合剂残余保留在基材上。
基材
本公开的粘合带可用于将多种基材粘附到它们自身或粘附到其它基材。示例性基材包括金属和金属合金，诸如不锈钢、锌；陶瓷，诸如玻璃；和聚合物，诸如，聚醚砜、聚碳酸酯(例如，以“LEXAN”品牌出售的那些)、聚酰胺(常常被称为尼龙)、芳族聚酰胺(例如，以“KEVLAR”品牌出售的那些)、聚己内酰胺、聚对苯二甲酸乙二醇酯(例如，以“MYLAR”品牌出售的那些)、聚醚醚酮、丙烯腈丁二烯苯乙烯、聚甲基丙烯酸甲酯、聚酰亚胺(例如，以“KAPTON”品牌出售的那些)、聚亚苯基、聚氨酯(例如，以“ESTANE”品牌出售的那些)、聚甲醛、乙缩醛(例如，以“DELRIN”品牌出售的那些)、聚苯乙烯、聚异丁烯、聚丙烯和聚乙烯。
实例
测试方法
PSA粘附性测量
遵循ASTM D3330，使用1英寸(2.5cm)宽的带材片层合到2密耳(0.051mm)厚铝片材来进行180剥离测试。将该构造层合到2英寸(5.1cm)×5英寸(12.7cm)×1/8英寸(0.32cm)不锈钢基材。将样本安装在张力测试机中，使得底部夹具固定不锈钢基材的一端并且顶部夹具固定180°环状层合铝带材端。制备两组三个带材样本。在层合之后，在15分钟的保压时间之后，对一组样本进行剥离测试。在层合72小时之后，测试另一组。使用得自明尼苏达州伊登普雷里的MTS系统公司(MTS Systems Corporation，Eden Prairie，Minnesota)的MTS-Insight电机30kN延伸长度张力测试设备用于剥离测试。粘附力值的单位为盎司/英寸(oz/in)。
背衬伸长测量
使用ASTM D638-10的修改版本对背衬进行伸长测量。哑铃状物的样本尺寸如下，总体长度(LO)为4.5英寸(11.4cm)，总体宽度为0.75英寸(1.9cm)，窄部分的宽度(W)为0.25英寸(0.64cm)，并且窄部分的长度(L)为1.25英寸(3.18cm)。使用用于PSA粘附性测量的相同张力测试设备进行伸长测试。将张力测试设备的夹具安装至哑铃状物，使得夹具之间的距离为2英寸(5.1cm)。延伸速率为2英寸/分钟(5.1cm/min)。报告的伸长值为％断裂伸长率。
拉伸释放测量
使用4.5磅(2.0kg)橡胶辊通过用手将0.5英寸(1.3cm)宽乘以约5英寸(12.7cm)长度的带材样本层合到2英寸(5.1cm)×5英寸(12.7cm)×1/8英寸(0.32cm)的不锈钢基材。通过用手将带材的一个边缘抬离基材并且然后以相对于基材平面30°的角度牵拉带材直到经由拉伸释放机构从基材去除带材，进行带材从基材的去除。然后，观察先前与粘合剂接触的基材表面的残余粘合剂。如果先前与粘合剂接触的基材表面的大于90％不含粘合剂残余，则样本通过测试。
背衬1制备
使用购自荷兰赫伦(Geleen，The Netherlands)的DSM Xplore公司的DSM 15cc微混配机(Micro-Compounder)制备背衬1。称取15g的Pebax 3533树脂，并且然后倾注到混配机的料斗中。混配机的六个区全都被设定至190℃。混配机的rmp被设定为50rpm并且混配机被构造成以共旋转模式运行。将挤出物收集到盘中，在盘中，将挤出物冷却并固化。使用具有10密耳(0.25mm)间隙的受热的9英寸(22.9cm)宽切口棒涂布机来制备膜样本。将收集的挤出物置于两个硅氧烷隔离衬片之间，隔离衬片各自为3密耳(0.076mm)厚，两个隔离衬片被置于涂布机的基座上。在涂布机上将材料加热至至少200℃。一旦挤出物已熔融，就牵拉树脂和衬片穿过切口棒间隙，从而产生具有4密耳(0.10mm)厚度的16英寸(40.6cm)×9英寸(22.9cm)的膜样本。
背衬2制备
与背衬1相似地制备背衬2，不同的是，在倾注到混配器的料斗中之前，将7.65g的Pebax 3533和7.35g的SP-560在容器中预共混。
背衬3制备
与背衬2相似地制备背衬3，不同的是，将7.95g的Pebax 3533和7.05g的SP-560在容器中预共混。
背衬4制备
与背衬2相似地制备背衬4，不同的是，将10.8g的Pebax 3533和4.2g的Hytrel 4056在容器中预共混。
背衬5制备
与背衬2相似地制备背衬5，不同的是，将6.35g的Pebax 3533、2.52g的Hytrel 4056和6.14g的SP-560在容器中预共混。
背衬6制备
与背衬2相似地制备背衬6，不同的是，将6.62g的Pebax 3533、2.61g的Hytrel 4056和5.78g的SP-560在容器中预共混。
背衬7制备
与背衬2相似地制备背衬7，不同的是，将6.14g的Pebax 3533、2.43g的Hytrel 4056、5.93g的SP-560、0.51g的SMA-3000P在容器中预共混。
背衬8制备
与背衬2相似地制备背衬6，不同的是，将6.38g的Pebax 3533、2.52g的Hytrel 4056、5.58g的SP-560、0.53g的SMA-3000P在容器中预共混。
背衬9制备
背衬9为可以商品名“3M热粘结膜668(3M Thermal Bonding Film668)”从3M公司商购获得的4密耳(0.10mm)膜。
通过用手将一片PSA层合到背衬来制备实例。将一片粘合剂转移带切割成与背衬的尺寸相似的尺寸。使用4.5磅(2.0kg)橡胶辊，将暴露的PSA转移带表面层合到背衬。表1指示检验的具体背衬-PSA组合。使用上述的测试方法，测量实例的与背衬的PSA粘合、背衬的断裂伸长率和拉伸释放行为。结果示于表1中。
表1

Claims (20)

1.一种粘合带，包括：
(a)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含(i)选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物，和(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和
(b)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面中的至少一个上，
其中，当所述制品设置在基材上时，所述制品能够沿第一方向拉伸并从所述基材释放。
2.根据权利要求1所述的粘合带，其中所述粘合带不包括用于引发拉伸的突片。
3.根据权利要求1所述的粘合带，其中在所述粘合带沿主轴拉伸并从所述基材释放之后，先前与所述粘合剂接触的基材表面的大于90％不含粘合剂残余。
4.根据权利要求1所述的粘合带，其中在所述粘合带沿主轴拉伸并从所述基材释放之后，基本上无粘合剂残余保留在所述基材上。
5.根据权利要求1所述的粘合带，其中所述背衬具有大于800％的断裂伸长率。
6.根据权利要求1所述的粘合带，其中所述增粘剂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、氧茚树脂、天然树脂松香、改性的松香、甘油酯松香、季戊四醇酯松香、烯丙基酚醛树脂、二甲苯甲醛树脂、苯乙烯树脂、二环戊二烯树脂、以及它们的混合物。
7.根据权利要求6所述的粘合带，其中所述增粘剂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、以及它们的混合物。
8.一种制品，包括：
(a)第一基材；
(b)粘附到所述第一基材的粘合带，所述粘合带包括
(1)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含：
(i)共聚物，所述共聚物选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合；和
(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和
(2)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面中的至少一个上。
9.根据权利要求8所述的制品，其中所述基材选自金属、玻璃和聚合物。
10.根据权利要求8所述的制品，还包括第二基材，并且其中所述粘合带包括所述弹性背衬的第一表面和第二表面上的丙烯酸酯粘合剂，并且其中所述粘合带被夹在所述第一基材和所述第二基材之间并且粘附到所述第一基材和所述第二基材。
11.根据权利要求8所述的制品，其中所述粘合带不包括用于引发拉伸的突片。
12.根据权利要求8所述的制品，其中在所述粘合带沿主轴拉伸并从所述基材释放之后，先前与所述粘合剂接触的基材表面的大于90％不含粘合剂残余。
13.根据权利要求8所述的制品，其中在所述粘合带沿主轴拉伸并从所述第一基材释放之后，基本上无粘合剂残余保留在所述第一基材上。
14.根据权利要求8所述的制品，其中所述背衬具有大于800％的断裂伸长率。
15.根据权利要求8所述的制品，其中所述增粘剂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、氧茚树脂、天然树脂松香、改性的松香、甘油酯松香、季戊四醇酯松香、烯丙基酚醛树脂、二甲苯甲醛树脂、苯乙烯树脂、二环戊二烯树脂、以及它们的混合物。
16.根据权利要求15所述的粘合带，其中所述增粘剂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、以及它们的混合物。
17.一种耦接和去耦接基材叠堆的方法，所述方法包括以下步骤：
(a)提供第一基材和第二基材；
(b)在所述第一基材和所述第二基材之间粘附所述粘合带，从而将所述第一基材和所述第二基材耦接成所述叠堆，所述粘合带包括：(1)弹性背衬，所述弹性背衬具有相对的第一表面和第二表面，所述背衬包含(i)选自聚醚-聚酯、聚醚-聚酰胺、以及它们的组合的共聚物；和(ii)基于所述背衬的总重量计约20重量％至60重量％的增粘剂，并且其中所述背衬具有大于500％的断裂伸长率；和(2)丙烯酸酯压敏粘合剂，所述丙烯酸酯压敏粘合剂设置在所述背衬的第一表面和第二表面上，
(c)将所述叠堆加热至所述粘合带的软化温度；
(d)从所述叠堆去除所述第一基材以暴露所述粘合带；以及
(e)将所述粘合带沿其长度牵拉，以将所述粘合带从所述第二基材拉伸释放。
18.根据权利要求17所述的耦接和去耦接基材叠堆的方法，其中在所述粘合带沿其长度被牵拉并从所述第二基材释放之后，先前与所述粘合剂接触的基材表面的大于90％不含粘合剂残余。
19.根据权利要求17所述的耦接和去耦接基材叠堆的方法，其中在所述粘合带沿其长度被牵拉并从所述第二基材释放之后，基本上无粘合剂残余保留在所述基材上。
20.根据权利要求17所述的耦接和去耦接基材叠堆的方法，其中所述增粘剂选自萜烯树脂、萜烯酚树脂、芳族改性的萜烯树脂、氧茚树脂、天然树脂松香、改性的松香、甘油酯松香、季戊四醇酯松香、烯丙基酚醛树脂、二甲苯甲醛树脂、苯乙烯树脂、二环戊二烯树脂、以及它们的混合物。
CN201380012656.9A 2012-03-08 2013-02-25 干净释放的拉伸可释放带材 Pending CN104379692A (zh)

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