CN114714719B - 一种高可靠性的聚烯烃光伏背板及其制备方法 - Google Patents
一种高可靠性的聚烯烃光伏背板及其制备方法 Download PDFInfo
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- CN114714719B CN114714719B CN202210173561.6A CN202210173561A CN114714719B CN 114714719 B CN114714719 B CN 114714719B CN 202210173561 A CN202210173561 A CN 202210173561A CN 114714719 B CN114714719 B CN 114714719B
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- aging agent
- backboard
- base material
- reliability
- polyolefin
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- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 22
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 22
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- NLZUEZXRPGMBCV-UHFFFAOYSA-N Butylhydroxytoluene Chemical compound CC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 NLZUEZXRPGMBCV-UHFFFAOYSA-N 0.000 description 11
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- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 1
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- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 description 1
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- 239000012965 benzophenone Substances 0.000 description 1
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- 229910052918 calcium silicate Inorganic materials 0.000 description 1
- OYACROKNLOSFPA-UHFFFAOYSA-N calcium;dioxido(oxo)silane Chemical compound [Ca+2].[O-][Si]([O-])=O OYACROKNLOSFPA-UHFFFAOYSA-N 0.000 description 1
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- KUMNEOGIHFCNQW-UHFFFAOYSA-N diphenyl phosphite Chemical compound C=1C=CC=CC=1OP([O-])OC1=CC=CC=C1 KUMNEOGIHFCNQW-UHFFFAOYSA-N 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
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- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 description 1
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- ZUOUZKKEUPVFJK-UHFFFAOYSA-N phenylbenzene Natural products C1=CC=CC=C1C1=CC=CC=C1 ZUOUZKKEUPVFJK-UHFFFAOYSA-N 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- H01L31/04—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof adapted as photovoltaic [PV] conversion devices
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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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
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- Laminated Bodies (AREA)
Abstract
本发明涉及太阳能光伏背板领域,IPC分类号为C08,具体涉及一种高可靠性的聚烯烃光伏背板及其制备方法,所述一种高可靠性的聚烯烃光伏背板,包括PO内层和PO外层,所述PO内层的厚度为100‑300μm,所述PO外层的厚度为100‑300μm。采用特定的PO内层和PO外层作用,能够极大程度上抑制背板材料在高温、高湿度条件下的失效、老化,延缓背板衰减速度,通过填料、紫外吸收剂的共同作用,使光伏背板不仅具有优异的机械性能,且能够在极薄的厚度规格下发挥持久耐水解、耐黄变的效果,聚烯烃背板的可靠性显著提升。
Description
技术领域
本发明涉及太阳能光伏背板领域,IPC分类号为C08,具体涉及一种高可靠性的聚烯烃光伏背板及其制备方法。
背景技术
光伏组件长期处于严苛的环境老化应力下,比如紫外辐射、极端温度、冷热循环、湿度等,都会影响光伏组件的粘结性能、抗紫外能力、机械强度,降低光伏组件的使用寿命,影响组件运行及安全性,光伏背板作为光伏组件的保障材料,是决定光伏组件可靠性的关键要素之一。传统的PET背板易水解,高温高湿环境下易开裂脱层,且氟膜层难于回收。聚烯烃(PO)背板能够有效改善光伏背板的耐候性,使光伏背板在严苛环境下仍然能够发挥保护作用,但聚烯烃背板由于聚烯烃和助剂种类和牌号众多,配方组分和含量、乃至设备工艺没有正确优化时,产品仍然容易出现开裂、脱层问题,极大程度上影响了聚烯烃背板的声誉和推广。以及,现有的聚烯烃背板采用共挤工艺对复合层进行定型时,无法兼顾背板的可靠性和尺寸精密度,所得背板的厚度较大,无法满足精密化光伏组件的使用需求。
专利CN202110147235.3公开了一种高效冷却降温的太阳能光伏背板及其制备方法,太阳能光伏背板包括PO内层和PO外层;PO内层的制备原料包括聚烯烃基料和填充剂,所制得太阳能光伏背板具有高效冷却降温的作用且兼具优异的散热、绝缘性,但其耐水解性不佳。
专利CN201610649820.2公开一种太阳能光伏背板及其制备方法,太阳能光伏背板包括粘结膜层、胶水层、中间PET层和外层PET层,所制得太阳能光伏背板具有良好的机械性能、耐水解、耐高温性,但光伏背板厚度较大,无法很好的满足精密化光伏组件的使用需求。
发明内容
本发明第一方面提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
优选的,所述PO内层的厚度为100-300μm。
优选的,所述PO外层的厚度为100-300μm。
优选的,所述PO内层的制备原料包括:按照重量份计,PE基料92-104份,紫外线吸收剂0.03-2份,抗老剂0.1-1.5份。
优选的,所述PO外层的制备原料包括:按照重量份计,PO基料82-104份,光稳定剂0.01-1份,抗氧剂0.1-1.2份,填料3-12份,偶联剂0.5-3份。
优选的,所述PE基料包括LLDPE、LDPE、HDPE、MDPE、CPE、PEX中的一种或几种的组合。
进一步优选的,所述PE基料为LLDPE(线性低密度聚乙烯)。
优选的,所述LLDPE的熔融指数为1-5g/10min,拉伸屈服强度≥10MPa。
优选的,所述紫外线吸收剂包括UV-531、UV-1164、UV326、UV-944、UV-770、UV-1577中的一种或几种的组合。
进一步优选的,所述紫外吸收剂优选为UV-531(2-羟基-4-正辛氧基二苯甲酮)和UV-1164(2-[4,6-双(2,4-二甲苯基)-2-(1,3,5-三嗪基)5-辛氧基苯酚)复配,UV-531和UV-1164的重量比为1:(0.5-2)。
优选的,所述抗老剂包括受阻酚类抗老剂、亚磷酸酯类抗老剂、胺类抗老剂、杂环类抗老剂中的一种或几种的组合。
优选的,所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为0.5-2:0.7-1.5。
优选的,所述受阻酚类抗老剂包括BHT、抗氧剂1010、抗氧剂2246、抗氧剂1076、抗氧剂1024中的一种。
优选的,所述亚磷酸酯抗老剂包括抗氧剂168、亚磷酸三苯酯、亚磷酸一苯二异辛酯、亚磷酸二苯酯、亚磷酸二苯一异癸酯中的一种或几种的组合。
优选的,所述PO基料包括PP、PE、POE、PB、PMP中的一种或几种的组合。
进一步优选的,所述PO基料为PP(聚丙烯),PE(聚乙烯)和POE(聚乙烯辛烯共弹性体)的复配,PP,PE和POE的重量比为0.5-2:0.7-1.7:2-4。
优选的,所述PP的熔融指数为3-12g/10min,屈服拉伸强度为20-40MPa。
优选的,所述POE的熔融指数为5-20g/10min,断裂伸长率为600-900%。
本申请人经过大量实验探究发现,当采用特定的PO内层和PO外层作用,能够极大程度上提升聚烯烃背板的环境耐受性。尤其是当采用熔融指数为1-5g/10min,拉伸屈服强度≥10MPa的LLDPE作为PO内层基料,配合特定的PP、PE、POE作为PO外层基料,能够形成多层次保护屏障,一方面兼具了和EVA胶膜的附着结合,另一方面能够形成高致密性的聚烯烃外层结构,提高背板机械强度,同时稳定有效地抵御水汽、化学品、冷/热空气的渗透,抑制背板材料在高温、高湿度条件下的失效、老化,延缓背板衰减速度,提高背板材料耐水解性能。
优选的,所述光稳定剂包括苯并三唑类光稳定剂、受阻胺类光稳定剂、二苯甲酮类光稳定剂、有机镍盐类光稳定剂中的一种。
优选的,所述光稳定剂为苯并三唑类光稳定剂。
优选的,所述苯并三唑类光稳定剂包括BASF Tinuvin 326、UV234、UV328、UV320、UV326、UV5411、UV327中的一种或多种的组合。
进一步优选的,所述苯并三唑类光稳定剂为BASF Tinuvin 326。
优选的,所述抗氧剂包括三(4-壬基酚)亚磷酸酯、双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯、亚磷酸三(2,4-二叔丁基苯基)酯中的一种或多种的组合。
优选的,所述偶联剂包括乙氧基硅氧烷、γ-氨丙基三乙氧基硅烷、甲基硅氧烷、γ―甲基丙烯酰氧基丙基三甲氧基硅烷中的一种或多种的组合。
优选的,所述填料包括钛白粉、硫酸钙、硅酸钙、气相二氧化硅中的一种或多种的组合。
进一步优选的,所述填料为钛白粉;更进一步优选,所述钛白粉的压实密度为50-160g/L,平均粒径为10-25nm。
进一步探究发现,当采用压实密度为50-160g/L,平均粒径为10-25nm的钛白粉作为填料,能够抑制有机助剂在基材中的逸散损失,促进光稳定剂对不同波段UV的吸收,抑制背板支撑结构在光照下的自由基作用,赋予背板持久的光稳定性能。同时意外发现,当紫外吸收剂选择UV-531和UV-1164复配,光稳定剂为苯并三唑类光稳定剂时,聚烯烃背板结构中的原料相容性强,聚合物分子链裹挟小分子助剂形成稳固的三维结构,光伏背板不仅具有优异的机械性能,且能够在极薄的厚度规格下发挥持久耐水解、耐黄变的效果,聚烯烃背板的可靠性显著提升。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
优选的,所述步骤(1)中造粒的温度为180-270℃。
优选的,所述步骤(2)中造粒的温度为150-300℃。
具体实施方式
实施例1
实施例1提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
所述PO内层的厚度为150μm。
所述PO外层的厚度为150μm。
所述PO内层的制备原料包括:按照重量份计,PE基料98.2份,紫外线吸收剂0.8份,抗老剂1份。
所述PO外层的制备原料包括:按照重量份计,PO基料92.5份,光稳定剂0.5份,抗氧剂1份,填料4份,偶联剂1份。
所述PE基料为LLDPE,牌号:DFDA-7042,购自扬子石化,熔融指数为2g/10min,拉伸屈服强度≥10MPa。
所述紫外吸收剂为UV-531和UV-1164复配,UV-531和UV-1164的重量比为1:0.5,UV-531,CAS号为1843-05-6,UV-1164,CAS号为2725-22-6。
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为0.7:0.8。
所述受阻酚类抗老剂为BHT,CAS号为128-37-0。
所述亚磷酸酯抗老剂为抗氧剂168,CAS为31570-04-4。
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为0.7:0.8:2.5。
所述PP具体为韩国LG聚丙烯SEETEC PP R3410,熔融指数为8.0g/10min,屈服拉伸强度为26.5MPa。
所述PE,品牌为美国陶氏,牌号:HDPE 05962B,熔融指数为5g/10min,屈服强度为28MPa。
所述POE,品牌为美国陶氏,牌号:8130,熔融指数为13g/10min,断裂伸长率为800%。
所述光稳定剂为BASF Tinuvin 326,品牌:巴斯夫,CAS号为3896-11-5。
所述抗氧剂为双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯,CAS号为26741-53-7。
所述偶联剂为γ-氨丙基三乙氧基硅烷,CAS号为919-30-2。
所述填料为钛白粉,来源于河北拓鹏化工有限公司,规格为325目。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
所述步骤(1)中造粒的温度为210℃。
所述步骤(2)中造粒的温度为220℃。
实施例2
实施例2提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
所述PO内层的厚度为200μm。
所述PO外层的厚度为200μm。
所述PO内层的制备原料包括:按照重量份计,PE基料97.6份,紫外线吸收剂1.2份,抗老剂1.2份。
所述PO外层的制备原料包括:按照重量份计,PO基料90.2份,光稳定剂0.8份,抗氧剂1份,填料6份,偶联剂2份。
所述PE基料为LLDPE,牌号:DFDA-7042,购自扬子石化,熔融指数为2g/10min,拉伸屈服强度≥10MPa。
所述紫外吸收剂为UV-531和UV-1164复配,UV-531和UV-1164的重量比为1:0.5,UV-531,CAS号为1843-05-6,UV-1164,CAS号为2725-22-6。
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为1:1。
所述受阻酚类抗老剂为BHT,CAS号为128-37-0。
所述亚磷酸酯抗老剂为抗氧剂168,CAS为31570-04-4。
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为1:1:3。
所述PP具体为韩国LG聚丙烯SEETEC PP R3410,CAS号为9010-79-1,熔融指数为8.0g/10min,屈服拉伸强度为26.5MPa。
所述PE,品牌为美国陶氏,牌号:HDPE 05962B,熔融指数为5g/10min,屈服强度为28MPa。
所述POE,品牌为美国陶氏,牌号:8130,熔融指数为13g/10min,断裂伸长率为800%。
所述光稳定剂为BASF Tinuvin 326,品牌:巴斯夫,CAS号为3896-11-5。
所述抗氧剂为双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯,CAS号为26741-53-7。
所述偶联剂为γ-氨丙基三乙氧基硅烷,CAS号为919-30-2。
所述填料为钛白粉,来源于河北拓鹏化工有限公司,规格为325目。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
所述步骤(1)中造粒的温度为210℃。
所述步骤(2)中造粒的温度为220℃。
对比例1
对比例1提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
所述PO内层的厚度为150μm。
所述PO外层的厚度为150μm。
所述PO内层的制备原料包括:按照重量份计,PE基料92份,紫外线吸收剂2份,抗老剂2份。
所述PO外层的制备原料包括:按照重量份计,PO基料93.5份,光稳定剂0.5份,抗氧剂1份,填料2份,偶联剂1份。
所述PE基料为LLDPE,牌号:DFDA-7042,购自扬子石化,熔融指数为2g/10min,拉伸屈服强度≥10MPa。
所述紫外吸收剂为UV-531和UV-1164复配,UV-531和UV-1164的重量比为1:0.5,UV-531,CAS号为1843-05-6,UV-1164,CAS号为2725-22-6。
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为1:1。
所述受阻酚类抗老剂为BHT,CAS号为128-37-0。
所述亚磷酸酯抗老剂为抗氧剂168,CAS为31570-04-4。
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为5:1:3。
所述PP具体为韩国LG聚丙烯SEETEC PP R3410,CAS号为9010-79-1,熔融指数为8.0g/10min,屈服拉伸强度为26.5MPa。
所述PE,品牌为美国陶氏,牌号:HDPE 05962B,熔融指数为5g/10min,屈服强度为28MPa。
所述POE,品牌为美国陶氏,牌号:8130,熔融指数为13g/10min,断裂伸长率为800%。
所述光稳定剂为BASF Tinuvin 326,品牌:巴斯夫,CAS号为3896-11-5。
所述抗氧剂为双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯,CAS号为26741-53-7。
所述偶联剂为γ-氨丙基三乙氧基硅烷,CAS号为919-30-2。
所述填料为钛白粉,来源于河北拓鹏化工有限公司,规格为325目。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
所述步骤(1)中造粒的温度为210℃。
所述步骤(2)中造粒的温度为220℃。
对比例2
对比例1提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
所述PO内层的厚度为150μm。
所述PO外层的厚度为150μm。
所述PO内层的制备原料包括:按照重量份计,PE基料98.2份,紫外线吸收剂0.8份,抗老剂1份。
所述PO外层的制备原料包括:按照重量份计,PO基料85份,光稳定剂0.5份,抗氧剂1份,填料10份,偶联剂5份。
所述PE基料为LLDPE,牌号:DFDA-7042,购自扬子石化,熔融指数为2g/10min,拉伸屈服强度≥10MPa。
所述紫外吸收剂为UV-531,CAS号为1843-05-6。
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为1:1。
所述受阻酚类抗老剂为BHT,CAS号为128-37-0。
所述亚磷酸酯抗老剂为抗氧剂168,CAS为31570-04-4。
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为1:1:3。
所述PP具体为韩国LG聚丙烯SEETEC PP R3410,CAS号为9010-79-1,熔融指数为8.0g/10min,屈服拉伸强度为26.5MPa。
所述PE,品牌为美国陶氏,牌号:HDPE 05962B,熔融指数为5g/10min,屈服强度为28MPa。
所述POE,品牌为美国陶氏,牌号:8130,熔融指数为13g/10min,断裂伸长率为800%。
所述光稳定剂为BASF Tinuvin 326,品牌:巴斯夫,CAS号为3896-11-5。
所述抗氧剂为双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯,CAS号为26741-53-7。
所述偶联剂为γ-氨丙基三乙氧基硅烷,CAS号为919-30-2。
所述填料为钛白粉,来源于河北拓鹏化工有限公司,规格为325目。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
所述步骤(1)中造粒的温度为210℃。
所述步骤(2)中造粒的温度为220℃。
对比例3
对比例1提供了一种高可靠性的聚烯烃光伏背板,所述聚烯烃光伏背板的结构包括PO内层和PO外层。
所述PO内层的厚度为150μm。
所述PO外层的厚度为150μm。
所述PO内层的制备原料包括:按照重量份计,PE基料96份,紫外线吸收剂0.05份,抗老剂0.1份。
所述PO外层的制备原料包括:按照重量份计,PO基料84份,光稳定剂0.05份,抗氧剂0.5份,填料6份,偶联剂1份。
所述PE基料为LLDPE,牌号:DFDA-7042,购自扬子石化,熔融指数为2g/10min,拉伸屈服强度≥10MPa。
所述紫外吸收剂为UV-531和UV-1164复配,UV-531和UV-1164的重量比为1:0.5,UV-531,CAS号为1843-05-6,UV-1164,CAS号为2725-22-6。
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为1:3。
所述受阻酚类抗老剂为BHT,CAS号为128-37-0。
所述亚磷酸酯抗老剂为抗氧剂168,CAS为31570-04-4。
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为1:1:3。
所述PP具体为韩国LG聚丙烯SEETEC PP R3410,CAS号为9010-79-1,熔融指数为8.0g/10min,屈服拉伸强度为26.5MPa。
所述PE,品牌为美国陶氏,牌号:HDPE 05962B,熔融指数为5g/10min,屈服强度为28MPa。
所述POE,品牌为美国陶氏,牌号:8130,熔融指数为13g/10min,断裂伸长率为800%。
所述光稳定剂为光稳定剂770,品牌:巴斯夫,CAS号为52829-07-9。
所述抗氧剂为双(2,4-二叔丁基苯酚)季戊四醇二亚磷酸酯,CAS号为26741-53-7。
所述偶联剂为γ-氨丙基三乙氧基硅烷,CAS号为919-30-2。
所述填料为钛白粉,来源于河北拓鹏化工有限公司,规格为325目。
本发明第二方面提供了一种高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
所述步骤(1)中造粒的温度为210℃。
所述步骤(2)中造粒的温度为220℃。
性能测试
1.机械强度:
根据IEC 61216-2005标准,对实施例1-2,对比例1-3所制得一种高可靠性的聚烯烃光伏背板进行拉伸强度、撕裂强度测试。
2.可靠性:
(1)耐紫外老化性
根据IEC 61216-2005标准(10.10紫外试验),对实施例1-2,对比例1-3所制得一种高可靠性的聚烯烃光伏背板进行紫外预处理后,进行紫外老化性测试;紫外辐射为15kWh/m2。
评价标准为:测试实施例、对比例所制得背板的断裂伸长保持率k,断裂伸长保持率k越高,表明背板具有越强的耐紫外老化性。
(2)耐湿热老化性
根据IEC 61216-2005标准,对实施例1-2,对比例1-3所制得一种高可靠性的聚烯烃光伏背板,置于测试温度为85℃,测试环境相对湿度85%的试验台中,进行1200h湿热处理,测试完成后,观察聚烯烃光伏背板的外观形态。
每个实施例/对比例设置10个平行样品,记录出现背板外表出现破损/开裂/弯曲缺陷的样品个数n,n≤2为优,n>2为差。
表1.性能测试结果
Claims (2)
1.一种高可靠性的聚烯烃光伏背板,包括PO内层和PO外层,其特征在于,所述PO内层的厚度为100-300μm,所述PO外层的厚度为100-300μm;
所述PO内层的制备原料包括:按照重量份计,PE基料98.2份,紫外线吸收剂0.8份,抗老剂1份;
所述PO外层的制备原料包括:按照重量份计,PO基料92.5份,光稳定剂0.5份,抗氧剂1份,填料4份,偶联剂1份;
所述紫外吸收剂为UV-531和UV-1164复配,UV-531和UV-1164的重量比为1:0.5;
所述抗老剂为受阻酚类抗老剂、亚磷酸酯抗老剂的复配,受阻酚类抗老剂、亚磷酸酯抗老剂的重量比为0.7:0.8;
所述PO基料为PP,PE和POE的复配,PP,PE和POE的重量比为0.7:0.8:2.5;
所述光稳定剂为BASF Tinuvin 326;
所述PP的熔融指数为3-12g/10min,屈服拉伸强度为20-40MPa;
所述POE的熔融指数为5-20g/10min,断裂伸长率为600-900%;
所述PE基料为LLDPE;
所述LLDPE的熔融指数为1-5g/10min,拉伸屈服强度≥10MPa;
所述填料为钛白粉;所述钛白粉的压实密度为50-160g/L,平均粒径为10-25nm。
2.一种根据权利要求1所述的高可靠性的聚烯烃光伏背板的制备方法,具体步骤包括:
(1):将PE基料、紫外线吸收剂、抗老剂置于双螺杆挤出机内混合,造粒,制备得到母粒a;
(2):将PO基料、光稳定剂、抗氧剂、填料、偶联剂置于双螺杆挤出机内混合,造粒,制备得到母粒b;
(3):分别将步骤(1)得到的母粒a和步骤(2)得到的母粒b转移至双螺杆挤出机的A通道和B通道中,熔融塑化后通过矩形口型模具共挤,得到膜材成品。
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