CN116535996A - 一种水汽阻隔型抗老化白色eva封装胶膜及其制备工艺 - Google Patents
一种水汽阻隔型抗老化白色eva封装胶膜及其制备工艺 Download PDFInfo
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- CN116535996A CN116535996A CN202310509258.3A CN202310509258A CN116535996A CN 116535996 A CN116535996 A CN 116535996A CN 202310509258 A CN202310509258 A CN 202310509258A CN 116535996 A CN116535996 A CN 116535996A
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- adhesive film
- white
- eva
- water vapor
- aging
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- KDYFGRWQOYBRFD-UHFFFAOYSA-N succinic acid Chemical compound OC(=O)CCC(O)=O KDYFGRWQOYBRFD-UHFFFAOYSA-N 0.000 claims description 6
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
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- C09J2203/322—Applications of adhesives in processes or use of adhesives in the form of films or foils for the production of solar panels
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- C—CHEMISTRY; METALLURGY
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- C09J2301/00—Additional features of adhesives in the form of films or foils
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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Abstract
本发明涉及太阳电池封装胶膜,具体为一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,尤其为单玻组件封装用白色EVA封装胶膜,属于光伏领域。封装胶膜包含EVA基体树脂,高体阻抗老化母粒、高性能阻水剂、复合型白色母粒、交联剂、助交联剂、硅烷偶联剂、光稳剂。所制备的胶膜具有提升抗PID能力,高水汽阻隔,低游离醋酸形成,高胶膜熔点等特点。配合电子束辐照工艺优化,改善胶膜溢白情况,改善辐照后及高温运输途中形成的粘连。
Description
技术领域
本发明涉及太阳电池封装胶膜,具体为一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,尤其为单玻组件封装用白色EVA封装胶膜,属于光伏领域。
背景技术
目前光伏组件封装方式多种多样,但不管何种封装方式,组件终端厂商无一不希望封装胶膜性能足够优异,不仅能够保护组件长时间稳定运行,同时期待能够在有限的组件空间内尽可能提升功率。白色EVA封装胶膜作为一种增益性产品,其独有的高反射优势能够提升光利用,进而带来组件功率提升,为组件终端厂商所青睐。并且由于其相较于POE生产工艺成熟,助剂兼容性良好,加工性能良好,与辐照工艺匹配性好,在封装胶膜市场上一直存在不小的需求量。
虽然一众组件终端客户对白膜充满兴趣,但直到目前为止,市场上主流的预交联白EVA使用效果依然不尽如人意,存在部分问题。首先是EVA由于材料本身特性,水汽透过率较POE高出一个数量级,在长期老化后水汽容易进入组件内部,进而带来游离的酸性物质的产生,对焊带及电池存在腐蚀性,影响组件功率。尤其是单玻组件,由于背板水汽阻隔能力较差,水汽透过情况更加严重;并且,各电池生产制造商及组件终端为了提升电池转化效率,不断革新电池技术,N型TOPCon电池或成为下一主流,而N型TOPCon电池对酸和水汽更加敏感,常规EVA封装胶膜难以满足N型TOPCon电池封装需求,急需低酸型封装胶膜以满足N型TOPCon电池封装。其次,由于游离醋酸的产生,可能产生自由迁移的阴阳离子,在电势差作用下形成漏电流,导致PID效应产生,影响组件功率;再者,目前市场上预交联白色EVA大多使用高能粒子束进行辐照,胶膜在辐照过程中存在吸能过程,常规在用的光伏EVA粒子熔点较低,胶膜吸能后软化导致拉伸,宽幅容易发生变化,吸能软化后也会导致胶膜变黏,在收卷张力的影响下,胶膜内部容易粘连,特别是在夏季高温运输后容易加剧粘连情况。最后,由于白色EVA中添加了白色颜料,如出现上溢至电池、焊带、汇流表面,会带来严重的外观问题,上溢至电池表面会影响功率,给客户带来使用问题。
发明内容
针对现有技术的不足,本发明提供一种封装胶膜包含EVA基体树脂,高体阻抗老化母粒、高性能阻水剂、复合型白色母粒、交联剂、助交联剂、硅烷偶联剂、光稳剂。所制备的胶膜具有提升抗PID能力,高水汽阻隔,低游离醋酸形成,高胶膜熔点等特点。配合电子束辐照工艺优化,改善胶膜溢白情况,改善辐照后及高温运输途中形成的粘连的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺。
为实现以上目的,本发明通过以下技术方案予以实现:
一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其组成包括以下成分及质量份数:
EVA树脂原料 40~89.5份;高体阻抗老化母粒 5~20份;高性能阻水剂 0.1~2.0份;复合型白色母粒 5~30份;交联剂 0.2~2.0份;助交联剂 0.1~2.0份;硅烷偶联剂0.05~2.0份;光稳剂 0.05~2.0份;
制备工艺,按以下步骤进行:
将高性能阻水剂、交联剂、助交联剂、硅烷偶联剂、光稳剂先置于助剂混料釜中在25±5℃的环境下进行,在相对湿度为50±5%RH下进行30min以上的助剂混料,形成混合助剂;
将复合型白色母粒、高体阻抗老化母粒、EVA树脂原料的粒子按照以上质量份数投入至混料釜中,经混料釜混合20~60min后,加入所述混合助剂,在相对湿度为50±5%RH、混料釜的温度为30~60℃的环境下,在混料釜中进行混合,混合时螺杆的转速为20~70rpm;
混合过程中,每隔30~60min启动混料釜上的循环***,将底部的混料加入至顶部中,以使混料更加均匀,总时长2~6h后完成混料;
将混料通过自动供料***进行供料,投入流延设备中,流延设备为单螺杆挤出流延设备,流延设备螺筒的温度设置为50~90℃,模头的温度设置为70~110℃,然后进行流延挤出、钢胶辊压花、冷却辊冷却、切刀分切、收卷形成白膜半成品。
作为优选,EVA树脂原料包含光伏和非光伏EVA树脂,光伏EVA与非光伏EVA比例为4:1~19:1;EVA树脂原料材料的熔融指数为3-40g/min,VA含量18-35%,体积电阻率≥1×1014。
作为优选,所述的高体阻抗老化母粒采用高体积电阻率低VA含量EVA树脂与聚烯烃弹性体按质量份数1:1进行混合,进行双螺杆造粒所得;
其中EVA树脂的VA含量为18%;
其中EVA树脂的体积电阻率≥1×1015,VA含量为18%-26%,熔点>80℃;
其中聚烯烃弹性体的熔点>85℃。
作为优选,高性能阻水剂为聚[(2-环氧乙烷基)-1,2-环己二醇] 2-乙基-2-(羟甲基)-1,3-丙二醇醚、3,4-环氧环己基甲基3,4-环氧环己基甲酸酯,邻苯二甲酸二缩水甘油酯、双(2,3-环氧基环戊基)醚、2,3-环氧基环戊基环戊基醚、二异戊二烯二环氧化物、三缩水甘油基三聚异氰酸酯、四缩水甘油基二氨基二亚甲基苯中一种或几种。
作为优选,复合型白色母粒包括母粒承载树脂、白色颜料、pH稳定剂和兼容助剂;并通过双螺杆挤出机造粒成型,造粒温度在90~150℃,成品复合型白色母粒熔体质量流动速率为MFR为20-35g/10min,稀释至8%浓度时过滤压力值FPV为0.02~0.35bar/g。
作为优选,母粒承载树脂包括EVA树脂和改性松香树脂,总份数为8~78.5份;
白色颜料为二氧化钛、纳米二氧化钛、氧化锌一种或几种组成,白色颜料的总质量份数为20~70份;使用二氧化钛时,为使成品白度更好,在白色颜料中加入金红石型二氧化钛和锐钛型二氧化钛,金红石型二氧化钛的质量份数为70~99份,锐钛型二氧化钛的质量份数1~30份,金红石型二氧化钛与锐钛型二氧化钛使用混料釜进行均匀混合后使用,所述混料釜为高速搅拌混料釜,其转速为350-1800rpm;
pH稳定剂包括氢氧化镁、氢氧化铝、氢氧化锌、氨基乙酸中一种或几种组成,pH稳定剂的总质量份数为1~20份;
兼容助剂为硅烷偶联剂、抗氧剂中一种或几种,兼容助剂的总质量份数为0.5~2份。
作为优选,交联剂为双叔丁基过氧化二异丙基苯、过氧化二异丙苯、叔丁基过氧化碳酸-2-乙基己酯、过氧化-2-乙基己酸特戊酯、3 ,3-二(叔丁基过氧)丁酸乙酯、过氧化二叔丁基中一种或几种。
作为优选,助交联剂为三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、三聚氰酸三烯丙脂、乙氧化三羟甲基丙烷三丙烯酸酯、三烯丙基异氰脲酸酯中一种或几种。
作为优选,硅烷偶联剂为3-氨基丙基三甲氧基硅烷、3-氨基丙基三乙氧基硅烷、3-(2,3-环氧丙基)三甲氧基硅烷、3-甲基丙烯酰氧丙基三甲氧基硅烷、γ-缩水甘油醚丙基三甲氧基硅烷、γ-氨丙基三乙氧基硅烷、乙烯基三乙氧基硅烷、1,2-双(三乙氧基硅基)乙烷、葵基三甲氧基硅烷中一种或几种。
作为优选,光稳剂为N,N'-双(2,2,6,6-四甲基-4-哌啶基)-1,6-己二胺与 2,4,6-三氯-1,3,5-三嗪和 N-丁基-1-丁胺和 N-丁基-2,2,6,6-四甲基-4-哌啶胺的反应产物的聚合物、双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯、聚丁二酸(4-羟基-2,2,6,6-四甲基-1-哌啶乙醇)酯、高分子量三嗪-哌啶缩合物、双(1-辛氧基-2,2,6,6-四甲基-4-哌啶基)癸二酸酯、丁二酸与(4-羟基-2,2,6,6-四甲基-1-哌啶醇的聚合物)中一种或几种。
作为优选,制作过程需要先进行流延挤出形成白膜半成品,白膜半成品经电子束辐照工艺进行辐照,辐照工艺主要包括放卷、接料、储膜、辐照、冷却、收卷工序后成为白色EVA成品。
作为优选,白膜半成品利用电子束辐照设备,在线速度10~50m/min,在束流10mA~50mA条件下进行电子束辐照,总辐照剂量8~25kgy,成品预交联度测试值在15~45%。
本发明包括二部分内容:白色EVA封装胶膜和老化封装胶膜制备工艺:
白色EVA封装胶膜:
其一在配方中添加高性能阻水剂成分,主要增加EVA交联过程交联密度,形成致密的立体网状交联结构,起到增强水汽阻隔作用;
其二,在配方中添加pH稳定剂,能够有效吸收组件内酸、碱物质,降低胶膜酸值,维持组件内部PH值的稳定,减少对电池和焊带、汇流条等辅材的腐蚀作用,为单玻组件尤其是TOPCon单玻组件带来更好的防护效果;
其三,在体系中添加高体阻抗老化母粒,一方面高体阻能够有效提升胶膜成品体积电阻率,低VA含量能够降低EVA醋酸乙烯酯键断裂带来的游离酸根离子,进而提升一定的抗PID能力;另一方面,体系中增加高体阻抗老化母粒后,由原本的纯EVA交联体系,形成EVA+POE交联体系,水汽阻隔效果好于纯EVA体系。通过三种不同方式对配方体系进行优化,提升成品水汽阻隔能力及胶膜抗老化效果。
其四,添加高体阻抗老化母粒后,母粒中使用的高熔点粒子,能够提升胶膜熔点,改善辐照后带来的宽幅变化和胶膜发黏现象,解决客户使用过程中由于胶膜粘连有几率造成裁切机拉断胶膜现象。
老化封装胶膜制备工艺:将所述复合型白色母粒与阻水剂、EVA树脂、聚烯烃树脂、交联剂、助交联剂、硅烷偶联剂、光稳剂经混料釜混合后,流延挤出成白膜半成品,然后利用高能电子束辐照设备,在线速度10-50m/min,束流10mA-50mA条件下进行电子束辐照,总辐照剂量8-20kgy,成品预交联度测试值在15-45%之间,优选辐照剂量范围,解决客户使用过程中溢白现象,同时避免辐照剂量过高带来的胶膜粘连加剧的问题。
相比现有白色EVA封装胶膜及其制备工艺,本发明的优势在于:
添加高体阻抗老化母粒,一方面能够有效提升胶膜成品体积电阻率,进而提升一定的抗PID能力;另一方面,体系中增加高体阻抗老化母粒后,由原本的纯EVA交联体系,形成EVA+POE交联体系,水汽阻隔效果好于纯EVA体系;另外,添加高体阻抗老化母粒,母粒中高熔点成分能够有效提升胶膜熔点,改善辐照吸能后软化带来的宽幅变化及发黏问题,解决客户使用过程中由于胶膜粘连裁切机拉断胶膜现象。
使用高性能阻水剂,能够增加交联密度,形成致密的三维立体网状结构,能够起到水汽阻隔作用;同时,由于阻水剂的存在,能够一定程度上对电子束辐照工艺起到增益作用,使得辐照形成的三维立体网状结构更加致密,能够降低白色EVA上溢、翻边等带来外观问题的概率,保证白色EVA有良好的外观;
使用复合型白色母粒,母粒添加高效PH稳定剂,PH稳定剂存在能够吸收产生的酸性物质,保持组件内部PH值的稳定性,降低组件内部电池、焊带及汇流条等辅材的腐蚀情况,尤其在单玻组件上,效果更加明显。另外,PH稳定剂组分具有一定的红外反射功能,能够反射红外辐射,有效降低组件内部温度,避免形成高温高湿环境,延长封装材料使用寿命,同时,降低组件由于温度系数造成的功率损失。
制备工艺条件优化,优选辐照剂量范围,严格控制辐照剂量,避免辐照剂量过低带来客户端使用上溢及辐照剂量过高带来的胶膜黏连加剧、老化易脱层的情况。
主要优势为高水汽阻隔,低酸值,抗PID,耐老化,不脱层,无溢白,辐照后宽幅变化小,不粘连等,能够保护组件在恶劣环境下长时间稳定运行.
具体实施方式
下面将结合本发明实施例,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。
实施例1:EVA树脂80.1份,高体阻抗老化母粒0份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0份,复合白色母粒18份(母粒中二氧化钛60份+氢氧化镁0份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
实施例2:EVA树脂89.5份,高体阻抗老化母粒3.5份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0.1份,复合白色母粒5份(母粒中二氧化钛70份+氢氧化镁1份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
实施例3:EVA树脂74.3份,高体阻抗老化母粒5份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0.8份,复合白色母粒18份(母粒中二氧化钛60份+氢氧化镁0份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
实施例4:EVA树脂69.3份,高体阻抗老化母粒10份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0.8份,复合白色母粒18份(母粒中二氧化钛60份+氢氧化镁3份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,丁二酸与(4-羟基-2,2,6,6-四甲基-1-哌啶醇的聚合物);将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
实施例5:EVA树脂64.3份,高体阻抗老化母粒15份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0.8份,复合白色母粒18份(母粒中二氧化钛60份+氢氧化镁6份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品
实施例6:EVA树脂58.1份,高体阻抗老化母粒20份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯2份,复合白色母粒18份(母粒中二氧化钛59份+氢氧化镁9份+氧化锌1份),双叔丁基过氧化二异丙基苯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-氨丙基三乙氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
实施例7:EVA树脂67份,高体阻抗老化母粒1份,3,4-环氧环己基甲基3,4-环氧环己基甲酸酯0.1份,复合白色母粒30份(母粒中二氧化钛59份+氢氧化镁9份+氧化锌1份),过氧化-2-乙基己酸特戊酯0.5份,三羟甲基丙烷三丙烯酸酯0.8份,γ-缩水甘油醚丙基三甲氧基硅烷0.5份,双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯0.1份;将上述原料投入混料釜,混料3h后投入挤出机流延挤出,收卷成半成品,经电子加速器30m/min 36mA束流的条件下,辐照加工后制成白色EVA成品。
测试例:
对实施例1-7进行的成品白色EVA胶膜进行性能测试,测试结果如表1所示。其中:外观检查按照IEC 61215-2 外观检查标准,在不低于1000lux光照条件下检查;
体积电阻率采用ZC-90E体积电阻率测试仪测试;
反射率测试采用Cary 5000 UV-Vis-NIR进行测试;
酸值采用888 OMNIS电位滴定仪进行测试,测试胶膜模拟单玻组件层压,即按玻璃、白色EVA胶膜、背板方式层压,经PCT48h后刮下胶膜进行测试;
剥离强度采用MX-B800拉力机进行测试;
宽幅采用经过校准的钢直尺进行测量;
水汽透过率采用C390进行测试,条件为38±0.5℃,90% RH±2%RH;
发黏情况测试胶膜采用20m/min 30mA辐照,辐照车间温度25℃,湿度55%RH±5%,辐照后放置于38℃高温下48h,然后在YZHG-1600SA分切机上进行复卷,复卷机设定张力10N/m,速度5m/min,记录各组合胶膜实际张力情况。
小组件功率测试采用N型210 MBB TOPCon电池,前膜采用我司透明EVA,后膜采用实施例1-7成品白色胶膜,焊接后采用250mm×250mm玻璃及背板进行145℃、三段保压780S层压成为单玻组件。
表1封装胶膜性能测试表
从测试数据可以看出,通过本发明制备的产品,水汽透过率较未添加阻水剂、高体阻抗老化母粒、PH稳定剂的实施例1,酸值、水汽透过率均有大幅提升,PCT小组件外观明显优于实施例1,功率衰减明显低于实施例1,宽幅变化明显优于实施例1,发黏情况远好于实施例1。表明本发明能够有效降低水汽透过,降低酸值,减少汇流条及焊带的腐蚀,提升抗老化性能,有效防止组件老化脱层现象。
上述实施方式仅为本发明的优选实施方式,不能以此来限定本专利保护范围,本领域的专业技术人员在本发明专利上所做的任何非实质性的变化及转化均属于本发明专利所要求的保护范围。
Claims (12)
1.一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:其组成包括以下成分及质量份数:
EVA树脂原料 40~89.5份;高体阻抗老化母粒 5~20份;高性能阻水剂 0.1~2.0份;复合型白色母粒 5~30份;交联剂 0.2~2.0份;助交联剂 0.1~2.0份;硅烷偶联剂 0.05~2.0份;光稳剂 0.05~2.0份;
制备工艺,按以下步骤进行:
将高性能阻水剂、交联剂、助交联剂、硅烷偶联剂、光稳剂先置于助剂混料釜中在25±5℃的环境下进行,在相对湿度为50±5%RH下进行30min以上的助剂混料,形成混合助剂;
将复合型白色母粒、高体阻抗老化母粒、EVA树脂原料的粒子按照以上质量份数投入至混料釜中,经混料釜混合20~60min后,加入所述混合助剂,在相对湿度为50±5%RH、混料釜的温度为30~60℃的环境下,在混料釜中进行混合,混合时螺杆的转速为20~70rpm;
混合过程中,每隔30~60min启动混料釜上的循环***,将底部的混料加入至顶部中,以使混料更加均匀,总时长2~6h后完成混料;
将混料通过自动供料***进行供料,投入流延设备中,流延设备为单螺杆挤出流延设备,流延设备螺筒的温度设置为50~90℃,模头的温度设置为70~110℃,然后进行流延挤出、钢胶辊压花、冷却辊冷却、切刀分切、收卷形成白膜半成品。
2.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:EVA树脂原料包含光伏和非光伏EVA树脂,光伏EVA与非光伏EVA比例为4:1~19:1;EVA树脂原料材料的熔融指数为3-40g/min,VA含量18-35%,体积电阻率≥1×1014。
3.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:所述的高体阻抗老化母粒采用高体积电阻率低VA含量EVA树脂与聚烯烃弹性体按质量份数1:1进行混合,进行双螺杆造粒所得;
其中EVA树脂的VA含量为18%;
其中EVA树脂的体积电阻率≥1×1015,VA含量为18%-26%,熔点>80℃;
其中聚烯烃弹性体的熔点>85℃。
4.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:高性能阻水剂为聚[(2-环氧乙烷基)-1,2-环己二醇] 2-乙基-2-(羟甲基)-1,3-丙二醇醚、3,4-环氧环己基甲基3,4-环氧环己基甲酸酯,邻苯二甲酸二缩水甘油酯、双(2,3-环氧基环戊基)醚、2,3-环氧基环戊基环戊基醚、二异戊二烯二环氧化物、三缩水甘油基三聚异氰酸酯、四缩水甘油基二氨基二亚甲基苯中一种或几种。
5.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:复合型白色母粒包括母粒承载树脂、白色颜料、pH稳定剂和兼容助剂;并通过双螺杆挤出机造粒成型,造粒温度在90~150℃,成品复合型白色母粒熔体质量流动速率为MFR为20-35g/10min,稀释至8%浓度时过滤压力值FPV为0.02~0.35bar/g。
6.根据权利要求5所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:
母粒承载树脂包括EVA树脂和改性松香树脂,总份数为8~78.5份;
白色颜料为二氧化钛、纳米二氧化钛、氧化锌一种或几种组成,白色颜料的总质量份数为20~70份;使用二氧化钛时,为使成品白度更好,在白色颜料中加入金红石型二氧化钛和锐钛型二氧化钛,金红石型二氧化钛的质量份数为70~99份,锐钛型二氧化钛的质量份数1~30份,金红石型二氧化钛与锐钛型二氧化钛使用混料釜进行均匀混合后使用,所述混料釜为高速搅拌混料釜,其转速为350-1800rpm;
pH稳定剂包括氢氧化镁、氢氧化铝、氢氧化锌、氨基乙酸中一种或几种组成,pH稳定剂的总质量份数为1~20份;
兼容助剂为硅烷偶联剂、抗氧剂中一种或几种,兼容助剂的总质量份数为0.5~2份。
7.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:交联剂为双叔丁基过氧化二异丙基苯、过氧化二异丙苯、叔丁基过氧化碳酸-2-乙基己酯、过氧化-2-乙基己酸特戊酯、3 ,3-二(叔丁基过氧)丁酸乙酯、过氧化二叔丁基中一种或几种。
8.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:助交联剂为三羟甲基丙烷三丙烯酸酯、三羟甲基丙烷三甲基丙烯酸酯、三聚氰酸三烯丙脂、乙氧化三羟甲基丙烷三丙烯酸酯、三烯丙基异氰脲酸酯中一种或几种。
9.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:硅烷偶联剂为3-氨基丙基三甲氧基硅烷、3-氨基丙基三乙氧基硅烷、3-(2,3-环氧丙基)三甲氧基硅烷、3-甲基丙烯酰氧丙基三甲氧基硅烷、γ-缩水甘油醚丙基三甲氧基硅烷、γ-氨丙基三乙氧基硅烷、乙烯基三乙氧基硅烷、1,2-双(三乙氧基硅基)乙烷、葵基三甲氧基硅烷中一种或几种。
10. 根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:光稳剂为N,N'-双(2,2,6,6-四甲基-4-哌啶基)-1,6-己二胺与 2,4,6-三氯-1,3,5-三嗪和 N-丁基-1-丁胺和 N-丁基-2,2,6,6-四甲基-4-哌啶胺的反应产物的聚合物、双(2,2,6,6,-四甲基-4-哌啶基)癸二酸酯、聚丁二酸(4-羟基-2,2,6,6-四甲基-1-哌啶乙醇)酯、高分子量三嗪-哌啶缩合物、双(1-辛氧基-2,2,6,6-四甲基-4-哌啶基)癸二酸酯、丁二酸与(4-羟基-2,2,6,6-四甲基-1-哌啶醇的聚合物)中一种或几种。
11.根据权利要求1所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:制作过程需要先进行流延挤出形成白膜半成品,白膜半成品经电子束辐照工艺进行辐照,辐照工艺主要包括放卷、接料、储膜、辐照、冷却、收卷工序后成为白色EVA成品。
12.根据权利要求11所述的一种水汽阻隔型抗老化白色EVA封装胶膜及其制备工艺,其特征在于:
白膜半成品利用电子束辐照设备,在线速度10~50m/min,在束流10mA~50mA条件下进行电子束辐照,总辐照剂量8~25kgy,成品预交联度测试值在15~45%。
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