CN113232340B - 一种白色防水解抗老化bopet背板膜的制备方法 - Google Patents

一种白色防水解抗老化bopet背板膜的制备方法 Download PDF

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CN113232340B
CN113232340B CN202110311299.2A CN202110311299A CN113232340B CN 113232340 B CN113232340 B CN 113232340B CN 202110311299 A CN202110311299 A CN 202110311299A CN 113232340 B CN113232340 B CN 113232340B
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骆平
高新
王高军
史武军
杜学良
董文昌
郭则宇
寿祖康
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Abstract

本发明提供了一种白色防水解抗老化BOPET背板膜的制备方法，将自制防水解抗老化母粒添加于PET切片中，另加入钛白母粒与抗粘母粒，以双向拉伸生产工艺制得白色防水解抗老化BOPET背板膜，本发明方法制得的产品可适用于太阳能光伏电池背板组装材料，具有优良的在室外恶劣环境下耐候特性，制造成本低，使用寿命长。

Description

一种白色防水解抗老化BOPET背板膜的制备方法
技术领域
本发明涉及民用太阳能光伏电池所需BOPET背板材料，一种白色防水解抗老化BOPET背板膜的制备方法。
背景技术
众所周知太阳能光伏电池是在户外阳光照射场所设立。而长期在湿热环境中以聚酯膜制作的背板材料易于被水解老化而失去其原有特性致光伏电池寿命期缩短。
往常使用的太阳能光伏电池BOPET背板膜本身不具有防水解抗老化在户外使用的耐候性，靠的是双面或单面覆合氟膜(Tedlar)或涂布氟膜溶剂(TPT结构)，以保护PET背板膜不裸露于户外恶劣环境(附图4)。但其氟膜或氟溶剂材料市场供应不足且价格昂贵，限制了PET背板膜的生产需求，致光伏电池的产量难以大幅增长。
因此开发试制防水解抗老化的耐候性优良的BOPET背板材料，既可降低制造成本，又可延长使用寿命。
发明内容
针对现有技术中存在的问题，本发明提供了一种白色防水解抗老化BOPET背板膜的制备方法。本发明采用自制防水解抗老化母料与PET切片相混溶后以双向拉伸工艺制得白色防水解抗老化BOPET背板膜，可免除复合或涂层氟材料的工序，既可达到户外使用的寿命期要求，又可大大降低应用成本。
本发明的技术方案如下：
一种白色防水解抗老化BOPET背板膜的制备方法，所述制备方法为：
(1)自制防水解抗老化母料
防水解抗老化母料的配方比例为：防水解剂2～4％、光稳定剂12～18％、抗氧化剂12～18％、PET切片余量；
按照配方比例，将防水解剂、光稳定剂、抗氧化剂、PET切片混合，搅拌均匀，挤出造粒，得到防水解抗老化母料；
所述防水解剂为：单碳二亚胺和聚碳二亚胺质量比1：2的混合物；
所述光稳定剂为：UV360和UV770质量比3：1的混合物；
所述抗氧化剂为：1010和330质量比3：1的混合物；
(2)确定背板膜ABA三层结构比例
背板膜为三层结构，其中芯层记作B层，上下两个表层记作A层，三层厚度比例为8：84：8；
优选的，背板膜以总厚度250μm计，A层厚度为20μm×2，B层厚度为210μm；
(3)双向拉伸工艺挤出成型
将表层原料PET切片、防水解抗老化母料、抗粘母料、钛白母料混合，结晶干燥后喂入挤出机A；将芯层原料PET切片结晶干燥后喂入挤出机B；之后依次经熔体过滤、模头分流、ABA三层共挤、铸片、纵向拉伸、横向拉伸、牵引测厚、电晕处理、收卷、时效处理、分切，得到成品BOPET背板膜，检验入库；
所述表层原料的配方比例为PET切片77％、防水解抗老化母料5％、抗粘母料8％、钛白母料10％；
具体的，经双向拉伸后合规改性的厚膜需经时效处理48小时以上；改性PET厚膜分切时的速度应比普通厚膜减慢20％左右；
以上操作均应在无尘恒温恒湿的室内环境中进行。
本发明的优点：本发明是使原有PET背板膜经过添加防水解抗老化母料而改性，使之成为自身具备优良的耐候特性以摆脱原有昂贵的氟材料以外覆保护。从而使光伏电池制造成本大为降低，同时又保持原有使用寿命。
附图说明
图1自制防水解抗老化母料流程示意图。
图2双向拉伸工艺挤出成型制备背板膜流程示意图。
图3防水解抗老化BOPET背板膜三层结构示意图。
图4现有TPT背板结构示意图。
具体实施方式
下面通过具体实施例进一步描述本发明，但本发明的保护范围并不仅限于此。
以下实施例中使用的原料、助剂可通过常规途径商购获得。其中，PET切片(仪征化纤)；抗粘母料为有机硅材质，珠海裕华产；钛白母料(TiO2)(苏州斯坦德瑞琪)；抗水解剂(中国台湾产牌号F11或英国产牌号P-100)；光稳定剂(汽巴精化UV360，UV770)；抗氧化剂(巴斯夫高桥1010，330)。
本发明生产场地为万级净化工程车间及其测试室。
实施例1
一种以添加自制防水解抗老化母料于BOPET厚膜中而制备的防水解抗老化PET改性背板膜
(1)自制防水解抗老化母料
防水解抗老化母粒的配方比例为：
①防水解剂：单碳二亚胺和聚碳二亚胺化合物中的两种混合物(各1/2)，以2％比例相混融。
②光稳定剂：UV360和UV770为3:1混合，以12％比例相混融。
③抗氧化剂：1010和330为3:1混合，以18％比例相混融。
④PET切片以68％比例相混融。
按照配方比例，将防水解剂、光稳定剂、抗氧化剂、PET切片混合后放置高速搅拌机，搅拌浆转速600r/min，均匀搅拌30分钟，每锅搅拌量约100kg。经搅拌干燥后的混合物加入到
Figure GDA0003130953030000021
双螺杆挤出造粒机中制备防水解抗老化母料，挤出量约每小时200kg。
(2)确定背板膜ABA三层结构比例
背板膜为三层结构，其中芯层记作B层，上下两个表层记作A层，三层厚度比例为8：84：8；
背板膜以总厚度250μm计，A层厚度为20μm×2，B层厚度为210μm；
(3)双向拉伸工艺挤出成型
将表层原料PET切片、防水解抗老化母料、抗粘母料、钛白母料混合，结晶干燥后喂入挤出机A；将芯层原料PET切片结晶干燥后喂入挤出机B；之后依次经熔体过滤、模头分流、ABA三层共挤、铸片、纵向拉伸、横向拉伸、牵引测厚、电晕处理、收卷、时效处理、分切，得到成品BOPET背板膜，检验入库；
表层原料的配方比例为：PET切片77％、防水解抗老化母料5％、抗粘母料8％、钛白母料10％；
经双向拉伸后合规改性的厚膜需经时效处理48小时；
改性PET厚膜分切时的速度应比普通厚膜减慢20％。
实施例2
防水解抗老化母粒的配方比例为：
①防水解剂：单碳二亚胺和聚碳二亚胺化合物中的两种混合物(各1/2)以3％比例相混融。
②光稳定剂：UV360和UV770为3:1混合，以15％比例相混融。
③抗氧化剂：1010和330为3:1混合，以15％比例相混融。
④PET切片以67％比例相混融。
其余操作与实施例1相同。
实施例3
防水解抗老化母粒的配方比例为：
①防水解剂：单碳二亚胺和聚碳二亚胺化合物中的两种混合物(各1/2)以4％比例相混融。
②光稳定剂：UV360和UV770为3:1混合，以18％比例相混融。
③抗氧化剂：1010和330为3:1混合，以12％比例相混融。
④PET切片以66％比例相混融。
其余操作与实施例1相同。
对比例1
一种以双向拉伸工艺制备的无添加防水解抗老化母料改性的普通BOPET背板膜。
(1)确定背板膜ABA三层结构比例
背板膜为三层结构，其中芯层记作B层，上下两个表层记作A层，三层厚度比例为8：84：8；
背板膜以总厚度250μm计，A层厚度为20μm×2，B层厚度为210μm；
(2)双向拉伸工艺挤出成型
将表层原料PET切片、防水解抗老化母料、抗粘母料、钛白母料混合，结晶干燥后喂入挤出机A；将芯层原料PET切片结晶干燥后喂入挤出机B；之后依次经熔体过滤、模头分流、ABA三层共挤、铸片、纵向拉伸、横向拉伸、牵引测厚、电晕处理、收卷、时效处理、分切，得到成品BOPET背板膜，检验入库；
表层原料的配方比例为：PET切片82％、抗粘母料8％、钛白母料10％。
上述实施例1～3及对比例1所制备的厚度为250μm的BOPET背板膜经耐候特性测试的各项指标结果如表1、表2。
表1样膜置于恒温恒湿箱(85℃85％RH)
Figure GDA0003130953030000031
表2样膜置于恒温恒湿箱(121℃100％RH)
Figure GDA0003130953030000032
Figure GDA0003130953030000041
样膜经紫外光吸收率测试，实施例1～3均≥98％，对比例1仅为76％。
以上测试数据可见，实施例2均优于其他。而实施例1、2、3均优于对比例1。如以实施例配方制备防水解抗老化母料而添加于BOPET厚膜中以改性，则其在民用太阳能光伏电池背板材料的应用上将会有极好的市场前景。

Claims (4)

1.一种白色防水解抗老化BOPET背板膜的制备方法，其特征在于，所述制备方法为：
(1)自制防水解抗老化母料
防水解抗老化母料的配方比例为：防水解剂2～4％、光稳定剂12～18％、抗氧化剂12～18％、PET切片余量；
按照配方比例，将防水解剂、光稳定剂、抗氧化剂、PET切片混合，搅拌均匀，挤出造粒，得到防水解抗老化母料；
所述防水解剂为：单碳二亚胺和聚碳二亚胺质量比1：2的混合物；
所述光稳定剂为：UV360和UV770质量比3：1的混合物；
所述抗氧化剂为：1010和330质量比3：1的混合物；
(2)确定背板膜ABA三层结构比例
背板膜为三层结构，其中芯层记作B层，上下两个表层记作A层，三层厚度比例为8：84：8；
(3)双向拉伸工艺挤出成型
将表层原料PET切片、防水解抗老化母料、抗粘母料、钛白母料混合，结晶干燥后喂入挤出机A；将芯层原料PET切片结晶干燥后喂入挤出机B；之后依次经熔体过滤、模头分流、ABA三层共挤、铸片、纵向拉伸、横向拉伸、牵引测厚、电晕处理、收卷、时效处理、分切，得到成品BOPET背板膜，检验入库；
所述表层原料的配方比例为PET切片77％、防水解抗老化母料5％、抗粘母料8％、钛白母料10％。
2.如权利要求1所述白色防水解抗老化BOPET背板膜的制备方法，其特征在于，步骤(2)中背板膜总厚度250μm，A层厚度为20μm×2，B层厚度为210μm。
3.如权利要求1所述白色防水解抗老化BOPET背板膜的制备方法，其特征在于，步骤(3)中经双向拉伸后合规改性的厚膜经时效处理48小时以上。
4.如权利要求1所述白色防水解抗老化BOPET背板膜的制备方法，其特征在于，步骤(3)中改性PET厚膜分切时的速度比普通厚膜减慢20％。
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