CN113858648B - 一种小型显示器用扩散膜的生产设备 - Google Patents
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Abstract
本发明公开了一种小型显示器用扩散膜的生产设备,包括基材传动机构、软膜传动机构以及UV固化设备;基材传动机构用于在基材的表面上进行UV树脂的涂胶;软膜传动机构包括软膜以及用于带动软膜进行循环转动的若干个软膜辊,软膜围绕若干个软膜锟形成封闭环状;软膜朝向基材的表面具有微结构,软膜通过软膜锟在UV树脂表面滚压,在基材的表面形成具有对应软膜表面微结构的扩散层;UV固化设备用于照射UV树脂使其成型。本发明提供的扩散膜生产设备采用UV固化设备进行成型固化,具有固化快、环保无毒等特点;另外该设备总长度小,提高了空间利用率;制得的扩散膜产品具有抗耐刮伤、抗顶白、高遮蔽性、高辉度等特点。
Description
技术领域
本发明属于光学薄膜技术领域,具体涉及一种小型显示器用扩散膜的生产设备。
背景技术
扩散膜,主要是指应用于LCD模组的背光光源部分,在背光源结构中主要起到修正扩散角度的作用,会使光辐射面积增大,将光线柔和均匀的散播出来,但是降低了单位面积的光强度,即减低辉度。多数扩散膜的基本结构是在透明基材上如PET基材两面通过树脂等粘合剂固定散光颗粒形成光扩散层,光线透过扩散膜时,会不断在两种折射率相异的介质中穿过,故光线就会发生许多折射、反射与散射的现象,如此便造成了光学扩散的效果。
现有扩散膜的生产工艺存在以下缺陷:(1)生产中采用的树脂一般是溶剂型热固化树脂,在干燥过程中溶剂挥发产生异味,同时存在严重的环保问题;(2)生产过程中,整体设备长度需要在20m以上,占用面积大,生产车间空间使用率低;(3)扩散膜产品的正面光扩散层雾度为90%以上,反面光扩散层雾度为15%以下,且光扩散层的结构组成为溶剂型热固化树脂加散光颗粒的形式,散光颗粒在生产过程中工艺较为复杂且会出现颗粒掉落等不良现象。
发明内容
针对现有技术的不足,本发明的目的是提供一种小型显示器用扩散膜生产设备,该生产设备中以软膜为模板,在PET等基材表面形成特定形状的微结构,达到改善扩散膜雾度、辉度等性能的目的。
为实现上述目的,本发明采用的技术方案为:
一种小型显示器用扩散膜的生产设备,包括基材传动机构、软膜传动机构以及UV固化设备;所述基材传动机构用于在基材的表面上进行UV树脂的涂胶,并将其传送至软膜传动机构位置处;所述软膜传动机构包括软膜以及用于带动软膜进行循环转动的若干个软膜辊,所述软膜围绕若干个软膜锟形成封闭的环状;所述软膜朝向基材的表面具有微结构,所述软膜通过软膜锟在UV树脂表面滚压,在基材的表面形成具有对应软膜表面微结构的扩散层;所述UV固化设备在软膜滚压的同时用于照射UV树脂使其成型。
作为优选的技术方案,所述基材传动机构包括用于存在基材的放卷机构、用于涂覆UV树脂的涂布机构以及用于收取扩散膜产品的收卷机构,所述放卷机构、收卷机构、软膜辊同步运动。进一步的,所述扩散膜产品的正面雾度为80-98%,背面雾度为30-70%;所述基材为PET基材。
作为优选的技术方案,所述微结构包括几何图形结构、点状图形结构、无规则结构中的至少一种。
作为优选的技术方案,所述UV树脂由以下组分按质量份制备而成:丙烯酸树脂低聚物50-80份,丙烯酸树脂单体10-40份,光引发剂1-5份。
所述UV树脂由以下组分按质量份制备而成:丙烯酸树脂低聚物50-80份,丙烯酸树脂单体10-40份,光引发剂1-5份,三氧化二铝1-2份、纳米级立方氮化硼0.1-0.5份。
所述丙烯酸树脂低聚物是由聚α,α'-[(1-甲基亚乙基)双-4,1-亚苯基]双[ω-[(2-丙烯酰基)氧基]-聚环氧乙烷和聚乙二醇邻苯基苯醚丙烯酸酯按质量比为5-7:10组成的混合物;
所述光引发剂为(2,4,6-三甲基苯甲酰基)二苯基氧化膦。
纳米级立方氮化硼,由立方氮化硼单晶磨粒制备而成,其粒径小,比表面积大,高表面活性,晶体结构具有类似石墨层状结构。纳米级立方氮化硼热稳定性能好,高温下具有极好的高导热绝缘性质,此外,立方氮化硼还能提高材料的机械性能和耐磨性。
本发明使用三氧化二铝与纳米级立方氮化硼进行复配,可以在保证材料硬度的同时,提高复合材料的导热系数。受热环境中,复合材料能够使热量得以传递而不至材料软化变形。
本发明中特殊的UV树脂可以形成具有优异可成型性的硬化光扩散层,具有良好的耐刮擦性,使制得的扩散膜具有高耐刮性。
本发明具有以下有益效果:
(1)本发明提供的扩散膜生产设备中的软膜传动机构由于软膜围绕若干个软膜锟形成封闭的环状,并配合UV固化设备替代传统热固化形式,可有效缩短设备的总长度,生产车间空间利用率大;
(2)本发明提供的扩散膜生产设备通过UV固化设备使UV树脂成型固化,具有固化快、环保无毒、耐刮伤等特点,可有效解决现有技术中由于溶剂型热固化树脂在使用中带来的问题。
(3)本发明提供的扩散膜生产设备生产速度为10~20m/min,生产制得的扩散膜产品的正面雾度为80-98%,背面雾度为30-70%,具有抗顶白、高遮蔽性、高辉度等特点。
(4)本发明将表面具有微结构的软膜在UV树脂层的表面滚压,形成具有微结构的扩散层。即提高了扩散膜表面粗糙度,进而提高扩散膜的扩散性能。
附图说明
图1为本发明提供的小型显示器用扩散膜生产设备的结构示意图;
附图标记:1-基材,2-放卷机构,3-收卷机构,4-软膜,5-软膜辊,6-UV固化设备,7-扩散膜。
具体实施方式
下面结合附图和实施例对本发明作更进一步的说明。显然,所描述的实施例是本发明一部分实施例,而不是全部的实施例。基于本发明中的实施例,本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例,都属于本发明保护的范围。
实施例1:
需要说明的是,在本发明中涉及的放卷机构、收卷机构、软膜、软膜辊、UV固化设备等均为市购产品,其具体的工作原理在此不作累述。本领域技术人员,根据实际生产需要,可选择具有相应功能的设备。
参考图1,一种小型显示器用扩散膜生产设备,包括基材传动机构、软膜传动机构以及UV固化设备6;所述基材传动机构用于在基材1的表面上进行UV树脂的涂胶,并将其传送至软膜传动机构位置处;具体的,基材1为PET基材,所述基材传动机构包括用于存在基材的放卷机构2、用于涂覆UV树脂的涂布机构(图未示)以及用于收取扩散膜7产品的收卷机构3,所述放卷机构2、收卷机构3、软膜辊5同步运动。所述软膜传动机构包括软膜4以及用于带动软膜进行循环转动的若干个软膜辊5,所述软膜4围绕若干个软膜锟5形成封闭的环状;所述软膜4朝向基材的表面具有微结构,所述软膜4通过软膜锟在UV树脂表面滚压,在基材的表面形成具有对应软膜表面微结构的扩散层;所述微结构包括几何图形结构、点状图形结构、无规则结构中的至少一种,在实际生产中,可根据最终产品性能的需要,选择具有相应特点微结构的软膜;所述UV固化设备6在软膜滚压的同时用于照射UV树脂使其成型。
实施例2:
本方案中使用的UV树脂是由以下组分按质量份制备而成的树脂:丙烯酸树脂低聚物60份,丙烯酸树脂单体30份,光引发剂4份,三氧化二铝1份、纳米级立方氮化硼0.5份;
其中:丙烯酸树脂低聚物是由57份聚α,α'-[(1-甲基亚乙基)双-4,1-亚苯基]双[ω-[(2-丙烯酰基)氧基]-聚环氧乙烷和10份聚乙二醇邻苯基苯醚丙烯酸酯组成的混合物;丙烯酸树脂单体选用2-苯氧基乙基丙烯酸酯;光引发剂选用(2,4,6-三甲基苯甲酰基)二苯基氧化膦。
将上述组合混合均后形成UV树脂涂液,将其涂覆在基材PET表面,形成具有优异可成型性的硬化光扩散层,具有良好的耐刮擦性和导热性,使制得的扩散膜具有高耐刮性。并且生产制得的扩散膜产品的正面雾度为80-98%,背面雾度为30-70%,具有抗顶白、高遮蔽性、高辉度等特点,满足用户的需求。
实施例3:
UV树脂是由以下组分按质量份制备而成的树脂:丙烯酸树脂低聚物80份,丙烯酸树脂单体10份,光引发剂1份,三氧化二铝2份、纳米级立方氮化硼0.1份;
其中:丙烯酸树脂低聚物是由57份聚α,α'-[(1-甲基亚乙基)双-4,1-亚苯基]双[ω-[(2-丙烯酰基)氧基]-聚环氧乙烷和10份聚乙二醇邻苯基苯醚丙烯酸酯组成的混合物;丙烯酸树脂单体选用2-苯氧基乙基丙烯酸酯;光引发剂选用(2,4,6-三甲基苯甲酰基)二苯基氧化膦。
丙烯酸类UV树脂可以形成具有优异可成型性的硬化光扩散层,具有良好的耐刮擦性,使制得的扩散膜具有高耐刮性。
实施例4:
UV树脂是由以下组分按质量份制备而成的树脂:丙烯酸树脂低聚物50份,丙烯酸树脂单体40份,光引发剂5份,三氧化二铝2份、纳米级立方氮化硼0.5份;
其中:丙烯酸树脂低聚物是由57份聚α,α'-[(1-甲基亚乙基)双-4,1-亚苯基]双[ω-[(2-丙烯酰基)氧基]-聚环氧乙烷和10份聚乙二醇邻苯基苯醚丙烯酸酯组成的混合物;丙烯酸树脂单体选用2-苯氧基乙基丙烯酸酯;光引发剂选用(2,4,6-三甲基苯甲酰基)二苯基氧化膦。
上述实施例为本发明较佳的实现方案,除此之外,本发明还可以其它方式实现,在不脱离本发明构思的前提下任何显而易见的替换均在本发明的保护范围之内。
Claims (5)
1.一种小型显示器用扩散膜的生产设备,其特征在于:包括基材传动机构、软膜传动机构以及UV固化设备;所述基材传动机构用于在基材的表面上进行UV树脂的涂胶,并将其传送至软膜传动机构位置处;所述软膜传动机构包括软膜以及用于带动软膜进行循环转动的若干个软膜辊,所述软膜围绕若干个软膜锟形成封闭的环状;所述软膜朝向基材的表面具有微结构,所述软膜通过软膜锟在UV树脂表面滚压,在基材的表面形成具有对应软膜表面微结构的扩散层;所述UV固化设备在软膜滚压的同时用于照射UV树脂使其成型;
所述UV树脂由以下组分按质量份制备而成:丙烯酸树脂低聚物50-80份,丙烯酸树脂单体10-40份,光引发剂1-5份,三氧化二铝1-2份、纳米级立方氮化硼0.1-0.5份;
所述丙烯酸树脂低聚物是由聚α,α'-[(1-甲基亚乙基)双-4,1-亚苯基]双[ω-[(2-丙烯酰基)氧基]-聚环氧乙烷 和聚乙二醇邻苯基苯醚丙烯酸酯按质量比为5-7:10组成的混合物;
所述光引发剂为(2,4,6-三甲基苯甲酰基)二苯基氧化膦。
2.根据权利要求1所述的小型显示器用扩散膜的生产设备,其特征在于:所述基材传动机构包括用于存在基材的放卷机构、用于涂覆UV树脂的涂布机构以及用于收取扩散膜产品的收卷机构,所述放卷机构、收卷机构、软膜辊同步运动。
3.根据权利要求1所述的小型显示器用扩散膜的生产设备,其特征在于:所述扩散膜产品的正面雾度为80-98%,背面雾度为30-70%。
4.根据权利要求1所述的小型显示器用扩散膜的生产设备,其特征在于:所述基材为PET基材。
5.根据权利要求1所述的小型显示器用扩散膜的生产设备,其特征在于:所述微结构包括几何图形结构、点状图形结构、无规则结构中的至少一种。
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