CN110834452A - 一种高反射背板膜及其制备方法 - Google Patents

一种高反射背板膜及其制备方法 Download PDF

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CN110834452A
CN110834452A CN201911172715.4A CN201911172715A CN110834452A CN 110834452 A CN110834452 A CN 110834452A CN 201911172715 A CN201911172715 A CN 201911172715A CN 110834452 A CN110834452 A CN 110834452A
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刘勤学
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Ningbo Qinbang New Material Technology Co Ltd
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Abstract

本发明公开了一种高反射背板膜，包括面层和芯层；所述面层由质量份为2‑3份白板母料、20‑30份母料、50‑60份高粘聚酯和20‑30份半消光切片组成；述芯层由质量份为50‑60份聚酯切片、20‑30份半消光切片、20‑30份一次回料、1‑3份发泡料和1份抗水解料组成。还公开了一种高反射背板膜的制备方法，包括以下步骤：S1、原料准备，S2、制备混合料，S3、原料结晶干燥，S4、挤出铸片，S5、收卷。具有反射率高，强度高，光泽度好，成本低的优点。

Description

一种高反射背板膜及其制备方法
技术领域
本发明涉及背板膜技术领域。
背景技术
随着世界范围内能源的短缺和环境问题的加剧，以太阳能为主的可再生能源的研究、开发和利用日益得到重视。太阳能有很多优势：取之不尽，用之不竭；不排放任何温室气体，没有噪音，对环境的影响极小，是一种绿色能源；分布遍及全球，地域限制性小。太阳能发电主要包括太阳能光热发电和太阳能光伏发电两种方式。太阳能的充分开发和利用，离不开太阳能材料和技术的发展。反射材料在槽式复合抛物面聚光器、太阳能热电装置、太阳能空调、太阳能锅炉和太阳灶等太阳能中高温应用系统中以及反射式光伏聚光器中有着广泛的应用。由于太阳能占地空间大，因此现在大多数的太阳发电站的分布面积要考虑尽可能的缩小，提高单位面积的太阳能接收能效的前提下，也要保证太阳能电池能够在密集环境下有一个较低的放置温度，这就导致了我们需要开发高反射背板膜的需求，高反射背板，能够通过反射率高，中间孔隙产生隔热层的优点，在保护太阳能电池温度的前提下，同时能够充分利用单位面积的太阳光照，使得太阳能发电板尽可能的接受光照，提高发电效率。
发明内容
本发明的一个目的在于提供一种反射率高，强度高，光泽度好，成本低的高反射背板膜。
本发明的另一个目的在于一种制备工艺简单，成本低的高反射背板膜的制备方法。
为达到以上目的，本发明采用的技术方案为：一种高反射背板膜，其特征在于：包括面层和芯层；
所述面层由质量份为2-3份白板母料、20-30份母料、50-60份高粘聚酯和20-30份半消光切片组成；
所述芯层由质量份为50-60份聚酯切片、20-30份半消光切片、20-30份一次回料、1-3份发泡料和1份抗水解料组成；
所述白板母料为TiO2添加剂的功能性聚酯，所述所述母料为含有SiO2添加剂的功能性聚酯，所述半消光切片为含有消光剂成分的功能性聚酯，所述一次回料为太阳能背板生产过程中所产生的回收利用料；
上述聚酯均是指聚对苯二甲酸乙二醇酯。
作为优选，所述发泡材料为非极性与弱极性材料，所述发泡材料为PP或PTFE或ABS或PE其中的一种或几种，所述抗水解料为含有抗水解添加剂的功能性聚酯。
一种高反射背板膜的制备方法，其特征在于：包括以下步骤：
S1、原料准备：选取高相对分子质量的高粘聚酯，作为原料；
S2、制备混合料：选取质量份为2-3份白板母料、20-30份母料、50-60份高粘聚酯和20-30份半消光切片作为混合料一；选取质量份为50-60份聚酯切片、20-30份半消光切片和20-30份一次回料作为混合料二；选取质量份为1-3份发泡料为料三；选取质量份为1份抗水解料为料四；并将上述四种料分别放入不同的混合料仓中，进行充分搅拌分散均匀；
S3、原料结晶干燥：将所述混合料一和所述混合料二分别在温度为150-160℃的流化床中结晶5h，再分别在温度为160℃的干燥塔内中干燥3h；将所述料三在温度为90℃的小型干燥设备中结晶4h，并在80℃的温度下干燥1h；将所述料四在温度为140℃的小型干燥设备中结晶4h，并在120℃的温度下干燥1h；
S4、挤出铸片：将结晶干燥完毕的所述混合料一和所述混合料二分别从面层和芯层下料；同时将结晶干燥完毕的所述料三和所述料四投入芯层挤出系统；
S5、收卷：根据薄膜的厚度和收卷情况，调整收卷张力和锥度系数，然后对成型的背板模进行收卷。
作为改进，上述步骤中，对横拉的循环风机风量进行控制，将循环风机的转速控制在800-1000r/min。避免出现拉伸不均现象。
与现有技术相比，本发明的有益效果在于：
本方案的白板母料为含有TiO2添加剂的功能性聚酯，通过TiO2纳晶具有的折射率和遮蔽性，对薄膜能够起到增加反射率的作用。而母料为含有SiO2添加剂的功能性聚酯，起到增加加工开口性的作用。半消光切片为含有消光剂成分，起到降低整体产品光泽度的作用。一次回料的使用目的是提高原料利用率，降低生产成本。发泡材料为非极性与弱极性材料，通过极性聚合物与非极性聚合物互不相容的原理，在中间形成细小的孔隙，通过光在孔隙中折射，起到增加反射率的作用，而且在产品中间形成孔隙，使得产品达到保温效果。抗水解料的添加能减少降解，稳定挤出机扭矩，从而提高产品的整体强度。值得一提的是，芯层采用发泡技术，面层添加白板母料，能达到相同的反射效果。
具体实施方式
下面，结合具体实施方式，对本发明做进一步描述，需要说明的是，在不相冲突的前提下，以下描述的各实施例之间或各技术特征之间可以任意组合形成新的实施例。
本发明的一个优选实施例的高反射背板膜，包括面层和芯层；
所述面层由质量份为2份白板母料、25份母料、50份高粘聚酯和25份半消光切片组成；
所述芯层由质量份为50份聚酯切片、25份半消光切片、25份一次回料、2份发泡料和1份抗水解料组成；
所述白板母料为TiO2添加剂的功能性聚酯，所述所述母料为含有SiO2添加剂的功能性聚酯，所述半消光切片为含有消光剂成分的功能性聚酯，所述一次回料为太阳能背板生产过程中所产生的回收利用料；上述聚酯均是指聚对苯二甲酸乙二醇酯。
其中，所述发泡材料为非极性与弱极性材料，所述发泡材料为PP或PTFE或ABS或PE其中的一种或几种，所述抗水解料为含有抗水解添加剂的功能性聚酯。
本实施例高反射背板膜的制备方法，包括以下步骤：
S1、原料准备：选取高相对分子质量的高粘聚酯，作为原料；
S2、制备混合料：选取质量份为2份白板母料、25份母料、50份高粘聚酯、25份半消光切片作为混合料一；选取质量份为50份聚酯切片、25份半消光切片和25份一次回料作为混合料二；选取质量份为2份发泡料为料三；选取质量份为1份抗水解料为料四；并将上述四种料分别放入不同的混合料仓中，进行充分搅拌分散均匀；
S3、原料结晶干燥：将所述混合料一和所述混合料二分别在温度为150-160℃的流化床中结晶5h，再分别在温度为160℃的干燥塔内中干燥3h；将所述料三在温度为90℃的小型干燥设备中结晶4h，并在80℃的温度下干燥1h；将所述料四在温度为140℃的小型干燥设备中结晶4h，并在120℃的温度下干燥1h；
S4、挤出铸片：将结晶干燥完毕的所述混合料一和所述混合料二分别从面层和芯层下料；同时将结晶干燥完毕的所述料三和所述料四投入芯层挤出系统；
S5、收卷：根据薄膜的厚度和收卷情况，调整收卷张力和锥度系数，然后对成型的背板模进行收卷。
其中上述步骤中，对横拉的循环风机风量进行控制，将循环风机的转速控制在800-1000r/min。
经过上述配方及制备方法成型的背板模，测其性能，结果列于下表：
Figure BDA0002289169810000041
以上描述了本发明的基本原理、主要特征和本发明的优点。本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是本发明的原理，在不脱离本发明精神和范围的前提下本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明的范围内。本发明要求的保护范围由所附的权利要求书及其等同物界定。

Claims (4)

1.一种高反射背板膜，其特征在于：包括面层和芯层；
所述面层由质量份为2-3份白板母料、20-30份母料、50-60份高粘聚酯和20-30份半消光切片组成；
所述芯层由质量份为50-60份聚酯切片、20-30份半消光切片、20-30份一次回料、1-3份发泡料和1份抗水解料组成；
所述白板母料为TiO2添加剂的功能性聚酯，所述所述母料为含有SiO2添加剂的功能性聚酯，所述半消光切片为含有消光剂成分的功能性聚酯，所述一次回料为太阳能背板生产过程中所产生的回收利用料；
上述聚酯均是指聚对苯二甲酸乙二醇酯。
2.根据权利要求1所述的一种高反射背板膜，其特征在于：所述发泡材料为非极性与弱极性材料，所述发泡材料为PP或PTFE或ABS或PE其中的一种或几种，所述抗水解料为含有抗水解添加剂的功能性聚酯。
3.一种如权利要求1所述的高反射背板膜的制备方法，其特征在于：包括以下步骤：
S1、原料准备：选取高相对分子质量的高粘聚酯，作为原料；
S2、制备混合料：选取质量份为2-3份白板母料、20-30份母料、50-60份高粘聚酯和20-30份半消光切片作为混合料一；选取质量份为50-60份聚酯切片、20-30份半消光切片和20-30份一次回料作为混合料二；选取质量份为1-3份发泡料为料三；选取质量份为1份抗水解料为料四；并将上述四种料分别放入不同的混合料仓中，进行充分搅拌分散均匀；
S3、原料结晶干燥：将所述混合料一和所述混合料二分别在温度为150-160℃的流化床中结晶5h，再分别在温度为160℃的干燥塔内中干燥3h；将所述料三在温度为90℃的小型干燥设备中结晶4h，并在80℃的温度下干燥1h；将所述料四在温度为140℃的小型干燥设备中结晶4h，并在120℃的温度下干燥1h；
S4、挤出铸片：将结晶干燥完毕的所述混合料一和所述混合料二分别从面层和芯层下料；同时将结晶干燥完毕的所述料三和所述料四投入芯层挤出系统；
S5、收卷：根据薄膜的厚度和收卷情况，调整收卷张力和锥度系数，然后对成型的背板模进行收卷。
4.根据权利要求3所述的一种高反射背板膜的制备方法，其特征在于：上述步骤中，对横拉的循环风机风量进行控制，将循环风机的转速控制在800-1000r/min。
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CN106626645A (zh) * 2015-10-29 2017-05-10 宁波长阳科技股份有限公司 一种聚酯薄膜、及太阳能电池背板及其制备方法
CN109177245A (zh) * 2018-06-19 2019-01-11 嘉兴市汇华光学科技有限公司 一种反射膜生产工艺
CN110190144A (zh) * 2019-05-15 2019-08-30 安徽金兑新材料科技有限公司 一种高反射率太阳能电池背板膜及其制备方法

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CN106626645A (zh) * 2015-10-29 2017-05-10 宁波长阳科技股份有限公司 一种聚酯薄膜、及太阳能电池背板及其制备方法
CN109177245A (zh) * 2018-06-19 2019-01-11 嘉兴市汇华光学科技有限公司 一种反射膜生产工艺
CN110190144A (zh) * 2019-05-15 2019-08-30 安徽金兑新材料科技有限公司 一种高反射率太阳能电池背板膜及其制备方法

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