CN111186193A - 一种高透光耐候性复合膜及其制备方法 - Google Patents

一种高透光耐候性复合膜及其制备方法 Download PDF

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CN111186193A
CN111186193A CN201911411572.8A CN201911411572A CN111186193A CN 111186193 A CN111186193 A CN 111186193A CN 201911411572 A CN201911411572 A CN 201911411572A CN 111186193 A CN111186193 A CN 111186193A
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film
parts
composite film
resistant composite
high light
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朱成
李世伟
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Goldman Sachs Electronic Polytron Technologies Inc
Nanjing Junhong New Material Co ltd
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Nanjing Junhong New Material Co ltd
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Abstract

本发明公开了一种高透光耐候性复合膜及其制备方法，从下至上依次包括基膜、胶粘层及外层膜；其中，胶粘层由胶水液涂覆于基膜上制得，该胶水液包括如下甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯；制备时在130‑150℃条件下将胶水液涂覆于基膜表面，随后与外层膜贴合，即制得该复合膜。本发明复合膜的阻水率高达3×10‑3‑10‑4g/m2·day，对紫外200‑365nm具有90％以上的截止能力，透光率达到88‑90％，具有优异的耐老化耐候性及抗污性；同时，其制备方法简单，能够连续化生产，具有柔性特征，可应用于显示、半导体器件及太阳能电池等领域。

Description

一种高透光耐候性复合膜及其制备方法
技术领域
本发明属于保护膜领域，尤其涉及一种高透光耐候性复合膜及其制备方法。
背景技术
随着社会发展，智能化、柔性化产品越来越受到人们的青睐，同时柔性薄膜产品在高精尖领域发挥出不可替代的作用，例如折叠太阳能伞、柔性显示器、可穿戴电子皮肤等等。为了保护易氧化易功率衰减的敏感半导体部件，对上层柔性保护膜提出了越来越高的要求:不仅对阻水阻气效果要求高，同时由于产品长期暴露在空气中，对耐候耐老化性能至少有着25年的可正常使用标准，此外针对抗污耐腐蚀与高透光等皆是使用之重要要求。迄今，由于国内技术短缺；厂商们还是以进口美国3M产品为主，发展自身的超高阻水率户外使用的复合膜产品迫在眉睫。
发明内容
发明目的：本发明的第一目的是提供一种阻水率高、耐候耐老化性能优、抗污且透光率高的复合膜；
本发明的第二目的是提供该复合膜的制备方法。
技术方案：本发明的高透光耐候性复合膜，该保护膜从下至上依次包括基膜、胶粘层及外层膜；其中，胶粘层由胶水液涂覆于基膜上制得，该胶水液按重量份数计包括如下原料：甲基苯基硅树脂40-50份、聚硅氧烷10-20份、二氧化钛0.1-0.5份及二甲苯30-40份。
本发明通过以甲基苯基硅树脂及聚硅氧烷为主剂，二氧化钛为助剂，二甲苯为溶剂复配制备复合膜，在搅拌分散均匀条件下，硅树脂发生水解反应形成硅氧键直链结构，如下结构所示，经过烘箱固化后，链状结构互相交叉，胶粘层最终为网状结构，进而使得该胶粘层耐老化、耐黄变特性强，为半导体、显示、太阳能电池等产品提供了稳定保障；同时将该胶粘层、基膜及外层莫进行复合，进而制备的复合膜阻水率可达3×10-3-10-4g/m2·day，耐48h PCT高强度老化。
Figure BDA0002350091740000021
其中，R1＝CH3；R2＝C2H5CH3C6H5。
进一步说，本发明基膜的厚度为100-125μm。胶粘层的厚度为20-40μm。外层膜的厚度为25-35μm。胶粘液由如下步骤制得：按重量份数将甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯混合后，在400-600rpm搅拌20-30min，制得胶粘层的胶粘液。外层膜按重量份数计包括如下原料：聚偏氟乙烯70-90份、聚甲基丙烯酸甲酯10-30份、二氧化钛0.05-1份、UV329粉料0.1-1份及UV-P粉料0.1-1份。外层膜由如下步骤制得：将聚偏氟乙烯70-90份、聚甲基丙烯酸甲酯10-30份、二氧化钛0.05-1份、UV329粉料0.1-1份及UV-P粉料0.1-1份混合，在160-200℃条件下造粒、挤出后，在130-150℃条件下拉伸制得。
本发明制备高透光耐候性复合膜的方法，包括如下步骤：在130-150℃条件下将胶粘液涂覆于基膜表面，随后与外层膜贴合，即制得该保护膜。
更进一步说，制备时涂覆的线速度为30-60m/min。
有益效果：与现有技术相比，本发明的显著优点为：该复合膜的阻水率高达3×10-3-10-4g/m2·day，对紫外200-365nm具有90％以上的截止能力，透光率达到88-90％，具有优异的耐老化耐候性及抗污性，其PCT老化试验48小时后黄变值小于3，接触角测试大于120度；同时，其制备方法简单，能够连续化生产，具有柔性特征，可应用于显示、半导体器件及太阳能电池等领域。
具体实施方式
下面结合实施例对本发明的技术方案做进一步详细说明。
实施例1
该实施例的复合膜从上至下依次包括外层膜、胶粘层及阻水基膜。其中，基膜为现有的型号为TBF1008阻水阻气基膜，其专利号为KR10-1329218。外层偏氟乙烯薄膜的原料如下表1所示，胶粘层如下表2所示。
表1实施例1的聚偏氟乙烯薄膜的原料成分
Figure BDA0002350091740000022
Figure BDA0002350091740000031
该外层膜的制备方法包括如下步骤：将聚偏氟乙烯、聚甲基丙烯酸甲酯、二氧化钛及UV粉料在60r/min条件下混合、160℃条件下造粒、挤出后，经过140℃烘箱拉伸制备出该聚偏氟乙烯外层膜。
表2实施例1的胶粘层的原料成分
组分 甲基苯基硅树脂 聚硅氧烷 二氧化钛 二甲苯
含量/份 40 20 0.1 40
该胶粘层的胶水液的制备方法包括如下步骤：将甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯混合于搅拌桶内，在400rpm搅拌30min，制得该有机硅胶水液。
本发明复合膜的制备方法包括如下步骤：利用微凹涂布工艺，在烘箱温度为130℃、车速为60m/min的条件下，将有机硅胶水液均匀涂在阻水基膜的表层，然后经涂布线二放与聚偏氟乙烯薄膜贴合，即可。
性能检测
将该实施例制备的复合膜进行性能检测，获得的结果如下表3所示。
表3实施例1制备的复合膜的性能
Figure BDA0002350091740000032
Figure BDA0002350091740000041
实施例2
该实施例的阻水复合膜，从上至下依次包括外层膜、胶粘层及阻水基膜。其中，外层偏氟乙烯薄膜的原料如下表4所示，胶粘层如下表4所示。
表4实施例2的聚偏氟乙烯薄膜的原料成分
Figure BDA0002350091740000042
该外层膜的制备方法包括如下步骤：将聚偏氟乙烯、聚甲基丙烯酸甲酯、二氧化钛及UV粉料在100r/min条件下混合、180℃条件下造粒、挤出，经过160℃烘箱拉伸制备出聚偏氟乙烯薄膜。
表5实施例2的胶粘层的原料成分
组分 甲基苯基硅树脂、 聚硅氧烷 二氧化钛 二甲苯
含量/份 50 10 0.5 30
胶粘层的胶水液制备方法包括如下步骤：将甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯混合于搅拌桶内，在600rpm搅拌30min，制得有机硅胶水液。
本发明复合膜的制备方法包括如下步骤：利用网纹涂布工艺，在烘箱温度为150℃、车速为60m/min的条件下，将有机硅胶水液均匀涂在阻水基膜的表层，然后经涂布线二放与聚偏氟乙烯薄膜贴合，即可。
性能检测
将该实施例制备的复合膜进行性能检测，获得的结果如下表6所示。
表6实施例2制备的复合膜的性能
Figure BDA0002350091740000043
Figure BDA0002350091740000051
实施例3
该实施例的复合膜从上至下依次包括外层膜、胶粘层及阻水基膜。其中，外层偏氟乙烯薄膜的原料如下表7所示，胶粘层如下表8所示。
表7实施例3的聚偏氟乙烯薄膜的原料成分
Figure BDA0002350091740000052
该外层膜的制备方法包括如下步骤：将聚偏氟乙烯、聚甲基丙烯酸甲酯、二氧化钛及UV粉料在60r/min条件下混合、160℃条件下造粒、挤出，经过140℃烘箱拉伸制备出聚偏氟乙烯薄膜。
表8实施例3的胶粘层的原料成分
组分 甲基苯基硅树脂 聚硅氧烷 二氧化钛 二甲苯
含量/份 45 15 0.3 35
该胶粘层的胶水液制备方法包括如下步骤：将取甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯混合于搅拌桶内，在500rpm搅拌30min，制得有机硅胶水液。
本发明复合膜的制备方法包括如下步骤：利用网纹涂布工艺，在烘箱温度为145℃、车速为60m/min的条件下，将有机硅胶水均匀涂在阻水基膜的表层，然后经涂布线二放与聚偏氟乙烯薄膜贴合，即可。
性能检测
将该实施例制备的复合膜进行性能检测，获得的结果如下表9所示。
表9实施例3制备的复合膜的性能
项目 性能
厚度(μm)(外层膜+胶粘层+阻水PET) 30+30+100
紫外吸收(％) 99
拉伸强度(MPa)(TD/MD) 95.5/88.3
断裂伸长率(％)(TD/MD) 72.6/78.7
PCT(48hΔb) 1.5
透光率(％) 89
阻水率(g/m<sup>2</sup>·day) 1×10<sup>-3</sup>
98％H<sub>2</sub>SO<sub>4</sub> 无渗透
30％HCl 无渗透
60％HNO3 无渗透
40％NaOH 无渗透
通过上述实施例可知，本发明的高透光耐候性保护膜不仅力学性能强，且具有优异的耐老化性能，抗污性能；同时，具有优越的光学性能，能够有效提高太阳能电池对光的利用率，并通过耐酸碱性结果可知，其具有优异的耐腐蚀。此外，本发明采用的原料均可从市场上购买得到。
除上述实施例之外，本发明在制备胶水液时的搅拌时间还可在500rpm条件下搅拌20min；制备外层膜时还可将原料混合后，在200℃条件下造粒、挤出后，在130℃条件下拉伸制得；制备复合膜时涂覆的线速度可为30m/min。

Claims (9)

1.一种高透光耐候性复合膜，其特征在于：该保护膜从下至上依次包括基膜、胶粘层及外层膜；其中，胶粘层由胶水液涂覆于基膜上制得，该胶粘液按重量份数计包括如下原料：甲基苯基硅树脂40-50份、聚硅氧烷10-20份、二氧化钛0.1-0.5份及二甲苯30-40份。
2.根据权利要求1所述的高透光耐候性复合膜，其特征在于：所述外层膜按重量份数计包括如下原料：聚偏氟乙烯70-90份、聚甲基丙烯酸甲酯10-30份、二氧化钛0.05-1份、UV329粉料0.1-1份及UV-P粉料0.1-1份。
3.根据权利要求1所述的高透光耐候性复合膜，其特征在于：所述基膜的厚度为100-125μm。
4.根据权利要求1所述的高透光耐候性复合膜，其特征在于：所述胶粘层的厚度为20-40μm。
5.根据权利要求1所述的高透光耐候性复合膜，其特征在于：所述外层膜的厚度为25-35μm。
6.根据权利要求1所述的高透光耐候性复合膜，其特征在于：所述胶水液由如下步骤制得：按重量份数将甲基苯基硅树脂、聚硅氧烷、二氧化钛及二甲苯混合后，在400-600rpm搅拌20-30min，制得胶粘层的胶粘液。
7.一种制备权利要求1所述高透光耐候性复合膜的方法，其特征在于包括如下步骤：在130-150℃条件下将胶水液涂覆于基膜表面，随后与外层膜贴合，即制得该复合膜。
8.根据权利要求7所述制备高透光耐候性复合膜的方法，其特征在于包括如下步骤：所述涂覆时的线速度为30-60m/min。
9.根据权利要求7所述制备高透光耐候性复合膜的方法，其特征在于：所述外层膜由如下步骤制得：将聚偏氟乙烯70-90份、聚甲基丙烯酸甲酯10-30份、二氧化钛0.05-1份、UV329粉料0.1-1份及UV-P粉料0.1-1份混合，在160-200℃条件下造粒、挤出后，在130-160℃条件下拉伸制得。
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