CN111730944A - 一种抗褶皱银反射膜及其加工工艺 - Google Patents
一种抗褶皱银反射膜及其加工工艺 Download PDFInfo
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Abstract
本发明公开了一种抗褶皱银反射膜及其加工工艺,首先将导热粉A与导热粉B相混合,倒入溶剂制成导热粉浆料,再将抗老氧化助剂、聚氨酯树脂和溶剂搅拌混合并加入导热粉浆料制成导热涂层;将导热涂层分别以1.3‑1.5g/m2和0.6‑0.9g/m2的涂覆速度分别涂覆在PET膜的上、下表面,制备得到导热预涂膜;利用聚酯‑聚氨酯胶水将导热预涂膜和镀银膜贴合起来,得到抗褶皱银反射膜;本发明提供了一种抗褶皱银反射膜及其加工工艺,制得的银反射膜具有很好的抗褶皱性能,长时间在高温环境下工作也不会发生老化和分层现象,膜层间粘附性较好,具有较高的实用性。
Description
技术领域
本发明涉及功能膜领域,具体是一种抗褶皱银反射膜及其加工工艺。
背景技术
LCD本身不具备显示功能,必须利用LCD背光源模组才能实现其显示功能。反射膜是LCD背光源模组的一部分,位于LCD背光源模组的最底部,反射膜上方设有导光板,反射膜的作用主要是将透过导光板漏到下面的光高效无损的反射回去,使光线重新回到面板侧,从而减少光损失,增加光亮度。银反射膜是以纯银或以银为绝对主体组分的银合金薄膜材料,在可见光区和红外光区都有很高的反射率,被广泛应用于液晶显示背光模组及照明装置。
目前市面上存在的银反射膜均是由多层膜贴合而成,为了保证高效的光反射率,降低光损耗,银反射膜表面需要非常光滑,但由于银反射膜工作时距离光源较近,长时间受热后,膜层间就会因为温差较大而引起应力变化,膜层分离,膜面易发生变形产生褶皱,从而导致光损耗增加,银反射膜的光反射效率下降,光亮度降低,直接影响到背光模组的使用寿命。
为了解决银反射膜膜层间附着力差,易产生褶皱的问题,当前主要研究的方法有:(1)对膜层表面进行修饰,在基板上沉积重金属层来作为保护层,该方法可有效提升银反射膜的反射效率,但工艺复杂,生产成本较高,且还容易对环境造成污染;(2)将缓蚀剂与透明丙烯酸类树脂混合并涂布到镀银膜上,虽然有效提升了银反射膜的耐候性,但缓蚀剂与镀银膜间形成的疏水层也降低了银反射膜的光反射效率;
综上所述,人们亟需一种在高温环境下不易产生褶皱,光反射效率高,膜层间附着力好的银反射膜。
发明内容
本发明的目的在于提供一种抗褶皱银反射膜及其加工工艺,以解决现有技术中银反射膜易产生褶皱,膜层间附着力差,反光反射效率低的问题。
为实现上述目的,本发明提供如下技术方案:
一种抗褶皱银反射膜:包括镀银膜和导热预涂膜,所述镀银膜与导热预涂膜之间通过贴合用胶水粘合,所述导热预涂膜包括导热涂层和PET膜,所述导热涂层分别涂覆在PET膜的上表面和下表面。
本发明在PET膜上表面和下表面分别涂覆导热涂层,导热涂层将镀银膜和PET膜分隔开来,避免了镀银膜和PET膜之间直接接触,导热预涂膜将镀银膜的一部分热量吸收,大大改善了镀银膜和PET膜之间因为温度差过大而产生褶皱的问题。
较优化地,所述导热涂层各原料组分如下:以重量份计,树脂100-200份、导热粉400-800份、溶剂100-200份、抗热氧老化助剂3-10份、功能助剂5-20份。
较优化地,所述树脂为热塑性聚氨酯树脂,所述导热粉包括导热粉A和导热粉B,所述导热粉A为金属氧化物,所述导热粉B为氮硅无机物,所述导热粉A和导热粉B的质量比例为(3-5):1。
较优化地,所述导热粉A为氧化铝、氧化硅、氧化锌中的一种或多种,所述导热粉B为氮化硼、氮化铝、氮化硅中的一种或多种。
热塑性聚氨酯树脂体系能够忍受较高的涂布温度和较长的烘干时间,且聚氨酯树脂与PET基膜之间的附着力比较强,有效避免了镀银膜和PET基膜之间的膜层分离问题。
导热粉B主要用于调节导热效率,导热粉A辅助导热粉B调节导热效率,且导热粉A价格较低,使用方便,导热粉A和导热粉B协同作用,导热效率好,性价比高;经过大量试验及测试,根据不同导热粉吸水性、比表面积等物性参数以及导热效率测试对比,本发明中的导热粉搭配还成功解决了导热粉的研磨分散及沉降问题。
较优化地,所述贴合用胶水为聚酯-聚氨酯双组分胶水,所述溶剂主要由醋酸乙酯和异丙醇组成,所述醋酸乙酯和异丙醇的质量比例为(1-3):1。
本发明中的导热涂层含有大量导热粉,尤其是含氮硅的导热粉影响PET基膜与镀银膜的贴合牢度,聚氨酯树脂能进一步加强PET基膜与镀银膜之间的粘附性,使得银反射膜膜层间不易分离。
较优化地,所述抗热氧老化助剂为2,6-叔丁基-4-甲基苯酚、四季戊四醇酯、3,5-二叔丁基-4-羟基苯丙酸十八酯、亚磷酸三苯酯、2-羟基-4-甲氧基二苯甲酮、2,2,-二羟基-4-甲氧基二苯甲酮、双癸二酸酯中的一种或多种。
较优化地,所述功能助剂为聚碳化二亚胺、8-羟基喹啉、三正丁基锡、乙酸苯汞、三磷酸酯、磷酸三苯酯、多聚磷酸铵、苯甲酰氯、己二酰氯、三乙烯二胺、三乙胺、三甲基苄胺、辛酸铅、乙酸苯汞中的一种或多种。
抗热氧老化助剂和功能助剂主要是用来维持银反射膜的光稳定性、热稳定性、水稳定性、防霉、阻燃、抗老化,同时有利于解决导热粉包覆混降的问题。
一种抗褶皱银反射膜及其加工工艺:包括以下步骤:
1)制备导热涂层;
a)导热粉预处理;
b)混合导热粉、抗氧老化助剂、树脂和溶剂;
2)制备导热预涂膜;
3)制备抗褶皱银反射膜;
具体包括以下步骤:
1)制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500-3000r/min转速分散90-120min后放入三辊研磨机研磨三道,制备得到细度为10-20um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90-120min,加入导热浆料,以300-500r/min转速搅拌40-60min,再以1500r/min转速搅拌90-120min,过滤,得到导热涂层;
2)制备导热预涂膜:
在90-140℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3-1.5g/m2,导热涂层在PET膜下表面的涂布量为0.6-0.9g/m2,得到导热预涂膜;
3)制备抗褶皱银反射膜:在50-90℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0-5.0g/m2,将镀银膜贴合在导热预涂膜上,置于40-50℃条件下熟化84-96h,得到抗褶皱银反射膜。
与现有技术相比,本发明的有益效果是:
本发明在PET膜上表面和下表面分别涂覆导热涂层,导热涂层将镀银膜和PET膜分隔开来,避免了镀银膜和PET膜之间直接接触,改善了镀银膜和PET膜之间因为温度差过大而产生褶皱的问题。
热塑性聚氨酯树脂体系能够忍受较高的涂布温度和较长的烘干时间,且聚氨酯树脂与PET基膜之间的附着力比较强,有效避免了镀银膜和PET基膜之间的膜层分离问题。
导热粉B主要用于调节导热效率,导热粉A辅助导热粉B调节导热效率,且导热粉A价格较低,使用方便,导热粉A和导热粉B协同作用,导热效率好,性价比高;经过大量试验及测试,根据不同导热粉吸水性、比表面积等物性参数以及导热效率测试对比,本发明中的导热粉搭配还成功解决了导热粉的研磨分散及沉降问题。
本发明中的导热涂层含有大量导热粉,尤其是含氮硅的导热粉影响PET基膜与镀银膜的贴合牢度,聚氨酯树脂能进一步加强PET基膜与镀银膜之间的粘附性,使得银反射膜膜层间不易分离。
抗热氧老化助剂和功能助剂主要是用来维持银反射膜的光稳定性、热稳定性、水稳定性、防霉、阻燃、抗老化,同时有利于解决导热粉包覆混降的问题。
具体实施方式
下面将对本发明实施例中的技术方案进行清楚、完整地描述,显然,所描述的实施例仅仅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做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
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500r/min转速分散900min后放入三辊研磨机研磨三道,制备得到细度为10um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90min,加入导热浆料,以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3g/m2,导热涂层在PET膜下表面的涂布量为0.6g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂100份、导热粉400份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实施例2
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以2500r/min转速分散100min后放入三辊研磨机研磨三道,制备得到细度为15um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂分别加入到混合中,以500r/min转速搅拌100min,加入导热浆料,以400r/min转速搅拌50min,再以1500r/min转速搅拌110min,过滤,得到导热涂层;
S2制备导热预涂膜:在110℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.4g/m2,导热涂层在PET膜下表面的涂布量为0.7g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在70℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.5g/m2,将镀银膜贴合在导热预涂膜上,置于45℃条件下熟化90h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂150份、导热粉550份、溶剂150份、抗热氧老化助剂6份、功能助剂16份。
实施例3
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以3000r/min转速分散120min后放入三辊研磨机研磨三道,制备得到细度为20um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌120min,加入导热浆料,以500r/min转速搅拌60min,再以1500r/min转速搅拌120min,过滤,得到导热涂层;
S2制备导热预涂膜:在140℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.5g/m2,导热涂层在PET膜下表面的涂布量为0.9g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在90℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为5.0g/m2,将镀银膜贴合在导热预涂膜上,置于50℃条件下熟化96h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂200份、导热粉800份、溶剂200份、抗热氧老化助剂10份、功能助剂20份。
实施例4
S1制备导热涂层:
将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90min,再以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3g/m2,导热涂层在PET膜下表面的涂布量为0.6g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂100份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实施例5
S1制备导热涂层:
a)导热粉预处理:将溶剂倒入导热粉A中浸泡2h,以1500r/min转速分散900min后放入三辊研磨机研磨三道,制备得到细度为10um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90min,加入导热浆料,以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3g/m2,导热涂层在PET膜下表面的涂布量为0.6g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚氨酯单组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂100份、导热粉A 400份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实施例6
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500r/min转速分散900min后放入三辊研磨机研磨三道,制备得到细度为10um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚醚-聚氨酯双组份树脂和溶剂混合,以500r/min转速搅拌90min,加入导热浆料,以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3g/m2,导热涂层在PET膜下表面的涂布量为0.6g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚醚-聚氨酯双组份树脂100份、导热粉400份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实施例7
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500r/min转速分散900min后放入三辊研磨机研磨三道,制备得到细度为10um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90min,加入导热浆料,以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的上表面,导热涂层在PET膜上表面的涂布量为1.3g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂100份、导热粉400份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实施例8
S1制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500r/min转速分散900min后放入三辊研磨机研磨三道,制备得到细度为10um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90min,加入导热浆料,以300r/min转速搅拌40min,再以1500r/min转速搅拌90min,过滤,得到导热涂层;
S2制备导热预涂膜:在90℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的下表面,导热涂层在PET膜下表面的涂布量为0.6g/m2,得到导热预涂膜;
S3制备抗褶皱银反射膜:在50℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0g/m2,将镀银膜贴合在导热预涂膜上,置于40℃条件下熟化84h,得到抗褶皱银反射膜。
导热涂层各原料组分如下:以重量份计,聚氨酯树脂100份、导热粉400份、溶剂100份、抗热氧老化助剂3份、功能助剂5份。
实验:
附着力测试:分别取实施例1-8中制得的银反射膜样品置于足够硬的平板上,利用百格测试仪在银反射膜样品上以平稳不颤动的手法和20-50mm/s的切割速度做格阵图形切割并穿透,划格完成的图形按六级分类,分别为0B、1B、2B、3B、4B、5B,根据等级来评定附着力效果,等级越高,附着力越好;
老化测试:分别取实施例1-8中制得的银反射膜样品置于恒温恒湿老化箱中,调节温度为80℃,老化48h,取出样品,观察银反射膜的发黄、裂纹、分层情况;
导热效率测试:取实施例1-8中制得的银反射膜样品中心进行局部加热,在银反射膜距热源每隔3cm标记一个温度测试点,一共设置4个测试点,再将银反射膜样品固定在100℃水浴箱中,计时30s后开始测定各温度测试点温度,导热效率测试结果见表2。
实施例1-4为对比实验,其中实施例4中未添加导热粉,直接将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成银反射膜;实施例5中使用的是聚氨酯单组分胶水,且只添加了导热粉A,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成银反射膜;实施例6中的树脂用的是聚醚-聚氨酯双组份树脂,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成银反射膜;实施例7中的导热涂层只涂覆了PET基膜的上表面,实施例8中的导热涂层只涂覆了PET基膜的下表面,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成银反射膜,其余参数无明显影响,对实施例1-8所得到的银反射膜样品进行以下检测,检测结果如下:
表2
根据表中数据可知,实施例4-8为对比例,实施例4中未添加导热粉,直接将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成银反射膜,得到的银反射膜样品导热效率是所有样品中最差的,致使银反射膜抗褶皱性能也较差;实施例5中使用的是聚氨酯单组分胶水,且只添加了导热粉A,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成的银反射膜导热效率较实施例4和实施例8略有改善,粘附性能也不太理想;实施例6中的树脂用的是聚醚-聚氨酯双组份树脂,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成的银反射膜因为导热粉的存在使得粘附性能一般,但是导热效率较实施例4-5和实施例8,大大改善;实施例7中的导热涂层只涂覆了PET基膜的上表面,制得的银反射膜因为下表面没有涂覆导热涂层,导致银反射膜样品抗老化性能较差,跟实施例7相比,导热性效率略差;实施例8中的导热涂层只涂覆了PET基膜的下表面,将导热浆料涂覆在PET基膜上,将PET基膜与镀银膜贴合制成的银反射膜,由于PET膜与镀银膜之间没有涂覆导热涂层,导热效率较实施例4略微改善,但与实施例1的导热效率相比还是有很大差距,导热效率过低直接导致PET膜与镀银膜之间温差较大,使得银反射膜抗褶皱性能较差,其余参数无明显影响。
将实施例1-3中,实施例1中制得的银反射膜样品试验结果最为理想,将实施例1与实施例4-8进行对比,实施例1中制得的银反射膜样品抗老化程度最高,抗褶皱能力最强,导热效率最好,粘附性能最优。
通过以上数据和实验,我们可以得出以下结论:1、传统银反射膜在高温环境下长期工作,极易发生老化、黄变和分层的现象,镀银膜表面极易产生褶皱,影响镀银膜的光反射效率,本发明在传统银反射膜的基础上在PET基膜的上表面和下表面分别涂覆有导热涂层制成导热预涂膜,将导热预涂膜和镀银膜通过聚酯-聚氨酯胶水贴合,避免了PET膜和镀银膜之间直接接触,减少了膜层间的温度差,改善了银反射膜的褶皱问题。
2、本发明中使用的聚酯-聚氨酯双组份胶水耐热性能好,能够在较高的温度下保持长时间的工作性能,粘附性能优异。且本发明利用导热粉A和导热粉B的协同作用,具有一定的经济效益且导热效率也比较理想。本发明原理简单,操作容易,抗褶皱抗老化效果好,经济效益高,具有非常广阔的应用前景。
对于本领域技术人员而言,显然本发明不限于上述示范性实施例的细节,而且在不背离本发明的精神或基本特征的情况下,能够以其他的具体形式实现本发明。因此,无论从哪一点来看,均应将实施例看作是示范性的,而且是非限制性的,本发明的范围由所附权利要求而不是上述说明限定,因此旨在将落在权利要求的等同要件的含义和范围内的所有变化囊括在本发明内。
Claims (10)
1.一种抗褶皱银反射膜,其特征在于:所述抗褶皱银反射膜包括镀银膜和导热预涂膜,所述镀银膜与导热预涂膜之间通过贴合用胶水粘合,所述导热预涂膜包括导热涂层和PET膜,所述导热涂层分别涂覆在PET膜的上表面和下表面。
2.根据权利要求1所述的一种抗褶皱银反射膜,其特征在于:所述导热涂层各原料组分如下:以重量份计,树脂100-200份、导热粉400-800份、溶剂100-200份、抗热氧老化助剂3-10份、功能助剂5-20份。
3.根据权利要求2所述的一种抗褶皱银反射膜,其特征在于:所述树脂为热塑性聚氨酯树脂,所述导热粉包括导热粉A和导热粉B,所述导热粉A为金属氧化物,所述导热粉B为氮化硼、氮化铝、氮化硅中的一种或多种,所述导热粉A和导热粉B的质量比例为(3-5):1。
4.根据权利要求2所述的一种抗褶皱银反射膜,其特征在于:所述导热粉A为氧化铝、氧化硅、氧化锌中的一种或多种。
5.根据权利要求1所述的一种抗褶皱银反射膜,其特征在于:所述贴合用胶水为聚酯-聚氨酯双组分胶水。
6.根据权利要求2所述的一种抗褶皱银反射膜,其特征在于:所述溶剂主要由醋酸乙酯和异丙醇组成,所述醋酸乙酯和异丙醇的质量比例为(1-3):1。
7.根据权利要求2所述的一种抗褶皱银反射膜,其特征在于:所述抗热氧老化助剂为2,6-叔丁基-4-甲基苯酚、四季戊四醇酯、3,5-二叔丁基-4-羟基苯丙酸十八酯、亚磷酸三苯酯、2-羟基-4-甲氧基二苯甲酮、2,2’-二羟基-4-甲氧基二苯甲酮、双癸二酸酯中的一种或多种。
8.根据权利要求2所述的一种抗褶皱银反射膜,其特征在于:所述功能助剂为聚碳化二亚胺、8-羟基喹啉、三正丁基锡、乙酸苯汞、三磷酸酯、磷酸三苯酯、多聚磷酸铵、苯甲酰氯、己二酰氯、三乙烯二胺、三乙胺、三甲基苄胺、辛酸铅、乙酸苯汞中的一种或多种。
9.一种抗褶皱银反射膜的加工工艺,其特征在于:包括以下步骤:
1)制备导热涂层:
a)导热粉预处理;
b)混合导热粉、抗氧老化助剂、树脂和溶剂;
2)制备导热预涂膜;
3)制备抗褶皱银反射膜。
10.根据权利要求9所述的一种抗褶皱银反射膜的加工工艺,其特征在于:具体包括以下步骤:
1)制备导热涂层:
a)导热粉预处理:将导热粉A和导热粉B混合均匀得到导热粉混合料,将溶剂倒入导热粉混合料中浸泡2h,以1500-3000r/min转速分散90-120min后放入三辊研磨机研磨三道,制备得到细度为10-20um的导热浆料;
b)合成导热涂层:将抗氧老化助剂、聚氨酯树脂和溶剂混合,以500r/min转速搅拌90-120min,加入导热浆料,以300-500r/min转速搅拌40-60min,再以1500r/min转速搅拌90-120min,过滤,得到导热涂层;
2)制备导热预涂膜:
在90-140℃时,将导热涂层以50m/min的涂布速度均匀涂布到PET膜的表面,导热涂层在PET膜上表面的涂布量为1.3-1.5g/m2,导热涂层在PET膜下表面的涂布量为0.6-0.9g/m2,得到导热预涂膜;
3)制备抗褶皱银反射膜:在50-90℃条件下,将聚酯-聚氨酯双组份胶水以30m/min的涂布速度均匀涂覆在导热预涂膜的上表面,上胶干量为4.0-5.0g/m2,将镀银膜贴合在导热预涂膜上,置于40-50℃条件下熟化84-96h,得到抗褶皱银反射膜。
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