CN108034378B - 复合泡棉胶带、其制备方法及应用 - Google Patents

复合泡棉胶带、其制备方法及应用 Download PDF

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CN108034378B
CN108034378B CN201711459556.7A CN201711459556A CN108034378B CN 108034378 B CN108034378 B CN 108034378B CN 201711459556 A CN201711459556 A CN 201711459556A CN 108034378 B CN108034378 B CN 108034378B
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李长顺
王富成
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Zhangjiagang Kangdexin Optronics Material Co Ltd
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Abstract

一种泡棉技术领域的复合泡棉胶带、其制备方法及应用，包括层叠设置的改性泡棉和黑色基底薄膜；所述改性泡棉主要由发泡母粒、助剂母粒和PE共混制得母片后，将母片经辐照交联制备得到；其中，所述发泡母粒主要由热塑性弹性体和PE制备得到；所述助剂母粒主要由PE、阻抗增强助剂和发泡剂制备得到；所述阻抗增强助剂包括碳基阻抗增强助剂。本发明通过设置高阻抗的改性泡棉，并与黑色基底薄膜复合制成胶带，集阻抗、遮光和抗震功能于一体。

Description

复合泡棉胶带、其制备方法及应用
技术领域
本发明涉及的是一种泡棉领域的技术，具体是一种复合泡棉胶带、其制备方法及应用。
背景技术
OLED技术目前已经广泛应用于显示设备中。由于显示设备发展的趋势是薄型化，OLED屏幕也做的越来越薄。但是轻薄的OLED屏幕存在易破碎等风险，因此常常采用泡棉贴在OLED屏幕背面，起到保护作用。另一方面，OLED显示设备的基底一般采用玻璃或者PI，因此需要进行遮光处理以免漏光。
在有些OLED屏幕中采用遮光胶带和泡棉胶带复合使用，以解决上述问题。目前的工艺方案都是将泡棉胶带以及遮光胶带分步贴在OLED手机屏幕后面。该工艺消耗的工时较多，且泡棉胶带以及遮光胶带贴合完毕后，重工性较差。
另外泡棉胶带在显示设备组装过程中，容易吸附灰尘，因此对泡棉胶带也有阻抗的要求，这也是目前的泡棉胶带需要改善的地方。
发明内容
本发明针对现有技术存在的上述不足，提出了一种复合泡棉胶带、其制备方法及应用，通过设置高阻抗的改性泡棉，并与黑色基底薄膜复合制成胶带，集阻抗、遮光和抗震功能于一体通过设置改性泡棉。
本发明是通过以下技术方案实现的：
本发明涉及一种复合泡棉胶带，包括层叠设置的改性泡棉和黑色基底薄膜；
所述改性泡棉主要由发泡母粒、助剂母粒和PE共混制得母片后，将母片经辐照交联制备得到；
其中，所述发泡母粒主要由热塑性弹性体和PE制备得到；
所述助剂母粒主要由PE(polyethylene，PE)、阻抗增强助剂和发泡剂制备得到；
所述阻抗增强助剂包括碳基阻抗增强助剂，优选包括活性炭、石墨、石墨烯和碳纳米管中的一种或多种，进一步优选包括碳纳米管。
所述复合泡棉胶带的密度为0.3～0.7g/cm3，雾度不小于99.5％，透光率不大于0.2％，180°剥离力为600～1200gf，25％压缩比为0.02～0.07MPa，阻抗为1012～1012.5Ω。
优选地，所述黑色基底薄膜为黑色PET薄膜。
优选地，所述的发泡剂为偶氮二甲酰胺。
所述的母片中发泡母粒、助剂母粒和PE粒子的重量份数比例是1:(0.1～0.5):(0.8～3.3)，优选地，所述的母片中发泡母粒、助剂母粒和PE粒子的重量份数比例是1:0.2:2。
所述的发泡母粒通过PE粒子、热塑性弹性体按重量份数1:(0.4～1.8)的比例共混混炼后造粒得到；
优选地，所述PE粒子与热塑性弹性体的重量份数比例为1:1；
优选地，所述的热塑性弹性体为TPU(Thermoplastic polyurethanes，TPU)粒子。
所述的助剂母粒通过PE粒子、阻抗增强助剂、发泡剂共混混炼后造粒得到，其中，PE粒子、阻抗增强助剂和发泡剂的重量份数比例为(85～147):1:(0.6～2.2)；优选地，PE粒子、阻抗增强助剂和发泡剂的重量份数比例为100:1:1。
所述改性泡棉的至少一侧表面经电晕处理，以提高与其他材料或结构的粘结力；所述的改性泡棉的一侧通过压敏胶粘结有黑色基底薄膜，所述的黑色基底薄膜在远离改性泡棉一侧通过压敏胶粘结有离型膜。
本发明涉及一种OLED显示设备，在OLED屏幕背面贴合有如上所述的复合泡棉胶带。
本发明涉及上述复合泡棉胶带的制备方法，其特征在于，包括以下步骤：
a)将PE粒子和热塑性弹性体共混混炼后造粒得到发泡母粒；
b)将PE粒子、碳基阻抗增强助剂和发泡剂共混混炼后造粒得到助剂母粒；
c)将制得的发泡母粒、助剂母粒与PE粒子共混制得母片，再将母片经γ射线辐照交联制得改性泡棉；优选地，γ射线的辐照量为40～60kGy；
d)对制得的改性泡棉进行电晕处理，并将改性泡棉的一侧与设有压敏胶的黑色基底薄膜进行粘结，制得泡棉胶带。
技术效果
与现有技术相比，本发明通过设置高阻抗的改性泡棉，并与黑色基底薄膜复合制成胶带，集阻抗、遮光和抗震功能于一体通过设置改性泡棉。
具体实施方式
下面结合具体实施方式对本发明进行详细描述。密度采用天平测得，依据标准ASTM D3574；雾度和透光率测试采用型号NDH2000的雾度计，测试依据标准JIS7136；180°剥离力测试采用万能拉力机，测试依据标准为GB/T-2792-2014；阻抗性能采用阻抗仪测得，测试依据标准ASTM D257；25％压缩比采用万能拉力机测得，测试依据标准JIS K6254。
实施例1
本实施例涉及一种复合泡棉胶带，包括依次层叠设置的改性泡棉、黑色基底薄膜和离型膜；
所述的改性泡棉通过将发泡母粒、助剂母粒和PE粒子按重量份数1:0.2:2的比例共混制成母片，将制成的母片通过辐照量为50kGy的γ射线进行辐照后制得。
优选地，所述的发泡母粒通过将PE粒子、TPU粒子按重量份数1:1的比例共混，在双螺杆挤出机中混炼后造粒得到。
优选地，所述的助剂母粒通过将PE粒子、碳纳米管、偶氮二甲酰胺按重量份数100:1:1的比例共混，在双螺杆挤出机中混炼后造粒得到。
所述的改性泡棉和黑色基底薄膜通过压敏胶粘结，所述的黑色基底薄膜和离型膜之间通过压敏胶粘结；
所述改性泡棉粘结压敏胶的一侧表面经电晕处理，以增强与黑色基底薄膜的粘结力。
本实施例在厚度为12μm的黑色基底薄膜两侧涂布厚度为10μm的压敏胶，再贴合离型膜，收卷得到半成品；将半成品一侧的离型膜剥离，采用贴合机将其与改性泡棉进行贴合，再收卷，得到复合泡棉胶带。
本实施例中所述复合泡棉胶带的密度为0.55g/cm3，雾度为99.9％，透光率为0.1％，180°剥离力为800gf，25％压缩比为0.02MPa，阻抗为1012Ω。
实施例2
本实施例涉及一种复合泡棉胶带，包括依次层叠设置的改性泡棉、黑色基底薄膜和离型膜；
所述的改性泡棉通过将发泡母粒、助剂母粒和PE粒子按重量份数1:0.15:3.1的比例共混制成母片，将制成的母片通过辐照量为60kGy的γ射线进行辐照后制得。
优选地，所述的发泡母粒通过将PE粒子、TPU粒子按重量份数1:0.5的比例共混，在双螺杆挤出机中混炼后造粒得到。
优选地，所述的助剂母粒通过将PE粒子、石墨烯、偶氮二甲酰胺按重量份数90:1:2的比例共混，在双螺杆挤出机中混炼后造粒得到。
所述的改性泡棉和黑色基底薄膜通过压敏胶粘结，所述的黑色基底薄膜和离型膜之间通过压敏胶粘结；
所述改性泡棉粘结压敏胶的一侧表面经电晕处理，以增强与黑色基底薄膜的粘结力。
本实施例在厚度为20μm的黑色基底薄膜两侧涂布厚度为6μm的压敏胶，再贴合离型膜，收卷得到半成品；将半成品一侧的离型膜剥离，采用贴合机将其与改性泡棉进行贴合，再收卷，得到复合泡棉胶带。
本实施例中所述复合泡棉胶带的密度为0.42g/cm3，雾度为99.8％，透光率为0.15％，180°剥离力为750gf，25％压缩比为0.025MPa，阻抗为1012.5Ω。
实施例3
本实施例涉及一种复合泡棉胶带，包括依次层叠设置的改性泡棉、黑色基底薄膜和离型膜；
所述的改性泡棉通过将发泡母粒、助剂母粒和PE粒子按重量份数1:0.4:1.2的比例共混制成母片，将制成的母片通过辐照量为40kGy的γ射线进行辐照后制得。
优选地，所述的发泡母粒通过将PE粒子、TPU粒子按重量份数1:1.6的比例共混，在双螺杆挤出机中混炼后造粒得到。
优选地，所述的助剂母粒通过将PE粒子、活性炭、偶氮二甲酰胺按重量份数140:1:0.75的比例共混，在双螺杆挤出机中混炼后造粒得到。
所述的改性泡棉和黑色基底薄膜通过压敏胶粘结，所述的黑色基底薄膜和离型膜之间通过压敏胶粘结；
所述改性泡棉粘结压敏胶的一侧表面经电晕处理，以增强与黑色基底薄膜的粘结力。
本实施例在厚度为25μm的黑色基底薄膜两侧涂布厚度为10μm的压敏胶，再贴合离型膜，收卷得到半成品；将半成品一侧的离型膜剥离，采用贴合机将其与改性泡棉进行贴合，再收卷，得到复合泡棉胶带。
本实施例中所述复合泡棉胶带的密度为0.68g/cm3，雾度为99.9％，透光率为0.1％，180°剥离力为1200gf，25％压缩比为0.03MPa，阻抗为1012.5Ω。
需要强调的是：以上仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，凡是依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (9)

1.一种复合泡棉胶带的制备方法，其特征在于，包括以下步骤：
a)将PE粒子和热塑性弹性体共混混炼后造粒得到发泡母粒；
b)将PE粒子、碳基阻抗增强助剂和发泡剂共混混炼后造粒得到助剂母粒；
c)将制得的发泡母粒、助剂母粒与PE粒子共混制得母片，再将母片经γ射线辐照交联制得改性泡棉
d)对制得的改性泡棉进行电晕处理，并通过贴合机将改性泡棉的一侧与设有压敏胶的黑色基底薄膜进行粘结，制得泡棉胶带；
所述的母片中发泡母粒、助剂母粒和PE粒子的重量份数比例是1:(0.1～0.5):(0.8～3.3)；
所述的发泡母粒通过PE粒子和热塑性弹性体共混混炼后造粒得到，其中，PE粒子与热塑性弹性体的重量份数比例为1:(0.4～1.8)；
所述的助剂母粒通过PE粒子、阻抗增强助剂、发泡剂共混混炼后造粒得到，其中，PE粒子、阻抗增强助剂和发泡剂的重量份数比例为(85～147):1:(0.6～2.2)。
2.根据权利要求1所述复合泡棉胶带的制备方法，其特征是，所述的母片中发泡母粒、助剂母粒和PE粒子的重量份数比例是1:0.2:2。
3.根据权利要求1所述复合泡棉胶带的制备方法，其特征是，所述PE粒子与热塑性弹性体的重量份数比例为1:1。
4.根据权利要求1所述复合泡棉胶带的制备方法，其特征是，所述的热塑性弹性体为TPU粒子。
5.根据权利要求1所述复合泡棉胶带的制备方法，其特征是，所述PE粒子、阻抗增强助剂和发泡剂的重量份数比例为100:1:1。
6.根据权利要求1所述复合泡棉胶带的制备方法，其特征是，所述的黑色基底薄膜在远离改性泡棉一侧通过压敏胶粘结有离型膜。
7.一种复合泡棉胶带，其特征在于，采用权利要求1-6任一项所述方法制成，包括层叠设置的改性泡棉和黑色基底薄膜。
8.根据权利要求7所述的复合泡棉胶带，其特征是，所述复合泡棉胶带的密度为0.3～0.7g/cm3，雾度不小于99.5％，透光率不大于0.2％，180°剥离力为600～1200gf，25％压缩比为0.02～0.07MPa。
9.一种OLED显示设备，其特征在于，在OLED屏幕背面贴合有权利要求7或8所述的复合泡棉胶带。
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