CN113817405A - 一种高透光环保光学扩散膜的制备方法 - Google Patents

一种高透光环保光学扩散膜的制备方法 Download PDF

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CN113817405A
CN113817405A CN202111194847.4A CN202111194847A CN113817405A CN 113817405 A CN113817405 A CN 113817405A CN 202111194847 A CN202111194847 A CN 202111194847A CN 113817405 A CN113817405 A CN 113817405A
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罗培栋
周云姣
卞高科
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Ningbo Dxc New Material Technology Co ltd
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Abstract

一种高透光环保光学扩散膜的制备方法，包括以下步骤：S1：以异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173为原料，混合均匀后制成水性树脂；S2：将步骤S1制备的水性树脂加入到搅拌机中，依次加入发泡剂、稳泡助剂、流平剂、抗静电剂，搅拌至混合均匀；S3：将步骤S2中的混合涂料取出，用高速分散机以3000 r/min的速度搅拌发泡；S4：将步骤S3制备的光扩散层涂料涂布于基材上表面，并通过紫外光固化；S5：将防粘连层的混合涂料涂布于基材下表面。本发明的工艺过程环保、制备的扩散膜提高了光的利用率。

Description

一种高透光环保光学扩散膜的制备方法
技术领域
本发明涉及一种光学扩散膜的制备方法。
背景技术
液晶显示（LCD）产品的背光模组中，LED点光源发出的光线通过光扩散膜的扩散作用，可实现点光源向面光源的转化。扩散膜根据扩散方式的不同可分成两类：一类为表面浮雕型，主要通过在基材表面设计特殊几何形状的微结构，实现对光线的调控以达到扩散的目的；一类为添加粒子型，主要通过在基材表面涂布的树脂中添加的扩散粒子对光线的散射作用，达到扩散光线均匀显示的效果。目前，第二类扩散膜由于加工设备的通用性更好等优势，占据着市场的主流位置。但是，此类扩散膜内部所含的光扩散粒子不可避免地会吸收入射光，意味着其扩散效果越好，透光性能将会越差，光效越低。因此，如何设计一种在降低光损失率的同时，不破坏其扩散效果的扩散膜，成为亟待解决的问题。
此外，此类扩散膜表面涂布的树脂大多需要有机溶剂才可溶解分散，这些有机溶剂在涂布液的配制和涂布过程中易挥发于空气中或残留于成品中，对人体健康和自然环境造成危害。
发明内容
为了克服现有技术扩散膜的上述不足，本发明提供一种高透光环保光学扩散膜的制备方法。
本发明解决其技术问题的技术方案是：一种高透光环保光学扩散膜的制备方法，包括以下步骤：
S1：以异佛尔酮二异氰酸酯（IPDI）、聚醚多元醇（NJ-210）、二羟甲基丙酸（DMPA）、丙烯酸羟乙酯甲基丙烯酸酯（HEMA）、三乙胺（TEA）、丙烯酸丁酯（BA）、三丙烯酸二丙二醇酯（TPGDA）和光引发剂Darocur 1173为原料，混合均匀后制成水性树脂；
其中异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173的质量比为25：32：3：16：8：5：6：3；
S2：将步骤S1制备的水性树脂加入到搅拌机中，依次加入发泡剂、稳泡助剂、流平剂、抗静电剂，搅拌至混合均匀；
S3：将步骤S2中的混合涂料取出，用高速分散机以3000 r/min的速度搅拌发泡；
S4：将步骤S3制备的光扩散层涂料涂布于基材上表面，并通过紫外光固化；
S5：将防粘连层的混合涂料涂布于基材下表面。
优选的，在步骤S2中，水性树脂、发泡剂、稳泡助剂、流平剂、抗静电剂的质量份数为：
水性树脂：100 份
发泡剂：3 ~ 6 份
稳泡助剂：1 ~ 2 份
流平剂：1.5 份
抗静电剂：1份。
优选的，所述发泡剂为偶氮二甲酰胺；
所述稳泡助剂为硬脂酸铵；
所述的流平剂为丙烯酸酯；
所述抗静电剂为乙氧基化脂肪族烷基胺抗静电剂。
本发明的有益效果在于：1.本发明的光扩散膜，扩散涂层选用可紫外光固化的水性树脂，代替有机溶剂分散介质，因此，对环境无污染，对操作人员无健康危害，加工过程安全可靠。且紫外光固化技术亦具有节能环保、污染小等特点。2.并通过机械发泡的工艺，形成发泡涂层，泡孔结构可替代扩散粒子实现对光的散射，且泡孔结构对光的吸收微乎其微，从而在降低成本的同时，提高了光的利用率。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明。
一种高透光环保光学扩散膜的制备方法，包括以下步骤：
S1：以异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173为原料，混合均匀后制成水性树脂；
其中异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173的质量比为25：32：3：16：8：5：6：3。
S2：将步骤S1制备的水性树脂加入到搅拌机中，依次加入发泡剂、稳泡助剂、流平剂、抗静电剂，搅拌至混合均匀。
其中水性树脂、发泡剂、稳泡助剂、流平剂、抗静电剂的质量份数为：
水性树脂：100 份
发泡剂偶氮二甲酰胺：3 ~ 6 份
稳泡助剂硬脂酸铵：1 ~ 2 份
流平剂丙烯酸酯：1.5 份
乙氧基化脂肪族烷基胺抗静电剂：1份。
S3：将步骤S2中的混合涂料取出，用高速分散机以3000 r/min的速度搅拌发泡；
S4：将步骤S3制备的光扩散层涂料涂布于基材上表面，并通过紫外光固化；
S5：将防粘连层的混合涂料涂布于基材下表面。

Claims (3)

1.一种高透光环保光学扩散膜的制备方法，其特征在于包括以下步骤：
S1：以异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173为原料，混合均匀后制成水性树脂；
其中异佛尔酮二异氰酸酯、聚醚多元醇、二羟甲基丙酸、丙烯酸羟乙酯甲基丙烯酸酯、三乙胺、丙烯酸丁酯、三丙烯酸二丙二醇酯和光引发剂Darocur 1173的质量比为25：32：3：16：8：5：6：3；
S2：将步骤S1制备的水性树脂加入到搅拌机中，依次加入发泡剂、稳泡助剂、流平剂、抗静电剂，搅拌至混合均匀；
S3：将步骤S2中的混合涂料取出，用高速分散机以3000 r/min的速度搅拌发泡；
S4：将步骤S3制备的光扩散层涂料涂布于基材上表面，并通过紫外光固化；
S5：将防粘连层的混合涂料涂布于基材下表面。
2.如权利要求1所述的高透光环保光学扩散膜的制备方法，其特征在于：在步骤S2中，水性树脂、发泡剂、稳泡助剂、流平剂、抗静电剂的质量份数为：
水性树脂：100 份
发泡剂：3 ~ 6 份
稳泡助剂：1 ~ 2 份
流平剂：1.5 份
抗静电剂：1份。
3.如权利要求1所述的高透光环保光学扩散膜的制备方法，其特征在于：所述发泡剂为偶氮二甲酰胺；
所述稳泡助剂为硬脂酸铵；
所述的流平剂为丙烯酸酯；
所述抗静电剂为乙氧基化脂肪族烷基胺抗静电剂。
CN202111194847.4A 2021-10-14 2021-10-14 一种高透光环保光学扩散膜的制备方法 Pending CN113817405A (zh)

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CN102749666A (zh) * 2011-04-20 2012-10-24 国家纳米科学中心 一种减反射涂层的制备方法
CN102336875A (zh) * 2011-06-29 2012-02-01 江苏大学 一种水性聚氨酯丙烯酸酯光固化涂料的制备方法
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CN110133774A (zh) * 2018-07-25 2019-08-16 湖北费米拉曼光电科技有限公司 一种多孔扩散膜及其制备方法与应用
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CN109471212A (zh) * 2018-12-24 2019-03-15 宁波激智科技股份有限公司 一种高亮度光学扩散膜
CN112724883A (zh) * 2020-12-30 2021-04-30 常州亚玛顿股份有限公司 一种具有提高光伏组件功率效果的封装材料

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Application publication date: 20211221