CN108623966A - 一种液晶显示屏用偏光膜片 - Google Patents

一种液晶显示屏用偏光膜片 Download PDF

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CN108623966A
CN108623966A CN201810409928.3A CN201810409928A CN108623966A CN 108623966 A CN108623966 A CN 108623966A CN 201810409928 A CN201810409928 A CN 201810409928A CN 108623966 A CN108623966 A CN 108623966A
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polarisation
film layer
liquid crystal
crystal display
coating fluid
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马洋
袁松青
刘苏同
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Jiangsu Emperor Moss Photoelectric Technology Co Ltd
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Abstract

本发明涉及一种液晶显示屏用偏光膜片，它包括偏光膜层、形成在偏光膜层任一表面的第一保护膜层以及形成在偏光膜层另一表面的第二保护膜层，偏光膜层是将涂布液施涂至基材层的表面进行固化后剥离基材层得到，所述涂布液的原料配方包括以下重量份数的组分：水10~20份；聚乙烯醇5~10份，所述聚乙烯醇的聚合度为500~2000；溴化1‑甲基‑3‑乙烯基咪唑鎓盐1~5份；紫外引发剂0.01~0.1份；聚乳酸0.2~0.5份；聚乙二醇0.2~0.5份；辛酸亚锡0.005~0.05份。通过采用含有溴化1‑甲基‑3‑乙烯基咪唑鎓盐、聚乙烯醇进行聚合并配合少量的聚乳酸和聚乙二醇，使得偏光膜片具有高透过率、抗静电、易吸水。

Description

一种液晶显示屏用偏光膜片
技术领域
本发明涉及一种偏光膜片，具体涉及一种液晶显示屏用偏光膜片。
背景技术
随着电子产品科技的快速发展，更多的人拥有了电子产品。作为电子产品液晶显示屏的保护增透作用的保护膜片，市场要求越来越严格。目前产品尚存在如下不足：1)保护膜片的反射率很高，环境光对观看显示内容有很大干扰，甚至会使得屏幕显示内容看不清；2)现有显示器面板表面的保护膜静电较大，易吸尘；3)偏光片厚度过高。
发明内容
本发明目的是为了克服现有技术的不足而提供一种液晶显示屏用偏光膜片。
为达到上述目的，本发明采用的技术方案是：一种液晶显示屏用偏光膜片，它包括偏光膜层1、形成在偏光膜层1任一表面的第一保护膜层2以及形成在偏光膜层1另一表面的第二保护膜层3，偏光膜层1是将涂布液施涂至基材层的表面进行固化后剥离基材层得到，所述涂布液的原料配方包括以下重量份数的组分：
优化地，所述涂布液的原料配方包括以下重量份数的组分：
由于上述技术方案运用，本发明与现有技术相比具有下列优点：本发明液晶显示屏用偏光膜片，通过采用含有溴化1-甲基-3-乙烯基咪唑鎓盐、聚乙烯醇进行聚合并配合少量的聚乳酸和聚乙二醇，使得偏光膜片具有高透过率、抗静电、易吸水。
附图说明
附图1为本发明液晶显示屏用偏光膜片的结构示意图。
具体实施方式
本发明液晶显示屏用偏光膜片，它包括偏光膜层1、形成在偏光膜层1任一表面的第一保护膜层2以及形成在偏光膜层1另一表面的第二保护膜层3，偏光膜层1是将涂布液施涂至基材层的表面进行固化后剥离基材层得到，所述涂布液的原料配方包括以下重量份数的组分：水10～20份；聚乙烯醇5～10份，所述聚乙烯醇的聚合度为500～2000；溴化1-甲基-3-乙烯基咪唑鎓盐1～5份；紫外引发剂0.01～0.1份；聚乳酸0.2～0.5份；聚乙二醇0.2～0.5份；辛酸亚锡0.005～0.05份。通过采用含有溴化1-甲基-3-乙烯基咪唑鎓盐、聚乙烯醇进行聚合并配合少量的聚乳酸和聚乙二醇，有利于提高偏光膜层1的高分子链的缠绕程度，从而使得偏光膜片具有高透过率、抗静电、易吸水。上述涂布液的原料配方包括以下重量份数的组分：水15份；聚乙烯醇10份，所述聚乙烯醇的聚合度为1000；溴化1-甲基-3-乙烯基咪唑鎓盐3份；紫外引发剂0.05份；聚乳酸0.3份；聚乙二醇0.25份；辛酸亚锡0.01份，此时偏光膜层1的透过率最高。
下面将结合对本发明优选实施方案进行详细说明：
实施例1
本实施例提供一种液晶显示屏用偏光膜片，如图1所示，它包括偏光膜层1、形成在偏光膜层1任一表面的第一保护膜层2以及形成在偏光膜层1另一表面的第二保护膜层3，偏光膜层1是将涂布液施涂至基材层的表面进行固化后剥离基材层得到；具体制备方法为：
(a)用模压涂布机将涂布液施涂至热塑性基体表面(200μm、Tg＝123℃)，随后至于100℃、UV紫外照射(60W/cm)的条件下5～10分钟固化形成约15μm的复合膜层；涂布液包括以下重量份数的组分：水10份、聚乙烯醇10份(聚合度为2000)、溴化1-甲基-3-乙烯基咪唑鎓盐1份、紫外引发剂0.01份(1173)、聚乳酸0.2份、聚乙二醇400 0.5份、辛酸亚锡0.005份；
(b)将步骤(a)中的双层结构在同步双轴拉伸机的作用下(140℃)其在宽度方向上收缩40％、在长度方向上伸长400％进行拉伸；
(c)将拉伸得到的双层结构浸入含碘水溶液(碘含量为0.5wt％、KI含量为10wt％)中处理1分钟；随后再浸入碘化钾水溶液中(KI含量为5wt％)处理30秒(这样在热塑性基体表面形成偏光膜层1，约为10μm)；
(d)将三醋酸纤维薄膜(TAC，50μm)粘覆在上述双层结构的表面(偏光膜侧)，使得偏光膜从热塑性基体上剥离，再在偏光膜的另一表面(剥离表面)粘覆三醋酸纤维薄膜即得偏光膜片。
实施例2
本实施例提供一种液晶显示屏用偏光膜片，它与实施例1中的液晶显示屏用偏光膜片基本一致，不同的是：涂布液的原料配方包括以下重量份数的组分：水20份；聚乙烯醇5份，(聚乙烯醇的聚合度为500)；溴化1-甲基-3-乙烯基咪唑鎓盐5份；紫外引发剂0.1份；聚乳酸0.5份；聚乙二醇0.2份；辛酸亚锡0.05份。
实施例3
本实施例提供一种液晶显示屏用偏光膜片，它与实施例1中的液晶显示屏用偏光膜片基本一致，不同的是：涂布液的原料配方包括以下重量份数的组分：水15份；聚乙烯醇10份，(聚乙烯醇的聚合度为1000)；溴化1-甲基-3-乙烯基咪唑鎓盐3份；紫外引发剂0.05份；聚乳酸0.3份；聚乙二醇0.25份；辛酸亚锡0.01份。
对比例1
本实施例提供一种液晶显示屏用偏光膜片，它与实施例1中的液晶显示屏用偏光膜片基本一致，不同的是：涂布液的原料配方仅包括以下重量份数的组分：水15份；聚乙烯醇10份，(聚乙烯醇的聚合度为1000)。
对实施例1-3、对比例1中的偏光膜层进行性能测试，具体如下：1、Nz系数测试：在各波长下测量通过将膜倾斜成与其吸收轴30°作为倾斜轴的正面相位差(Re)和相位差(R30)，然后用三维折射率计算由所得相位差的值测定其Nz系数；2、偏光度：用分光光度计测量偏光膜的单片透射率、平行透过率和交叉透过率，以测定偏光度(P)；3、耐久性：使得偏光膜片(各10个样品)静置在环境温度急剧变化的炉中，检查其发生裂纹的比例；其数据见表1。从表1中可以看出，添加聚乳酸、溴化1-甲基-3-乙烯基咪唑鎓盐等组分后对偏光膜片的耐久度产生了负面的影响，但是其Nz系数和偏光度产生了积极的效果。
实施例1 实施例2 实施例3 对比例1
Nz系数 1.35 1.38 1.30 1.40
偏光度 99.96％ 99.96％ 99.98％ 99.94％
耐久度 30％ 32％ 28％ 25％
上述实施例只为说明本发明的技术构思及特点，其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施，并不能以此限制本发明的保护范围，凡根据本发明精神实质所作的等效变化或修饰，都应涵盖在本发明的保护范围之内。

Claims (2)

1.一种液晶显示屏用偏光膜片，它包括偏光膜层(1)、形成在所述偏光膜层(1)任一表面的第一保护膜层(2)以及形成在所述偏光膜层(1)另一表面的第二保护膜层(3)，所述偏光膜层(1)是将涂布液施涂至基材层的表面进行固化后剥离基材层得到，其特征在于：所述涂布液的原料配方包括以下重量份数的组分：
2.根据权利要求1所述的液晶显示屏用偏光膜片，其特征在于：所述涂布液的原料配方包括以下重量份数的组分：
CN201810409928.3A 2018-05-02 2018-05-02 一种液晶显示屏用偏光膜片 Pending CN108623966A (zh)

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