CN112225981B - 一种焊带载体膜及其制备方法和应用 - Google Patents
一种焊带载体膜及其制备方法和应用 Download PDFInfo
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- CN112225981B CN112225981B CN202010986695.0A CN202010986695A CN112225981B CN 112225981 B CN112225981 B CN 112225981B CN 202010986695 A CN202010986695 A CN 202010986695A CN 112225981 B CN112225981 B CN 112225981B
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Abstract
本发明涉及一种焊带载体膜,按质量百分比计,其原料配方包括50~99%的基体树脂、0~50%的增粘树脂、0~5%的助剂;所述的基体树脂为聚烯烃树脂及其弹性体、聚酯树脂及其弹性体、聚乙烯醇缩丁醛酯、乙烯‑醋酸乙烯酯共聚物、乙烯‑丙烯酸共聚物、离子聚合物、聚酰胺、氟树脂、及上述物质的改性物中的一种或多种;所述的增粘树脂为松香、氢化松香、石油树脂、氢化石油树脂、酚醛树脂、萜烯树脂中的一种或多种。本发明通过对载体膜配方的优化,使得载体膜可以制作成单层结构,在保证与焊带和电池片的粘结性能的同时,可以起到支撑作用,载体膜在层压时不会被焊带压穿,本发明的载体膜结构简单,生产成本以及设备成本低。
Description
技术领域
本发明具体涉及一种焊带载体膜及其制备方法和应用。
背景技术
目前光伏行业组件的发展趋势是从3主栅变成4主栅、5主栅,近而发展成现在的多主栅。近几年有提出无主栅组件,可以节约银的用量以及减少栅线对电池片遮挡,提高发电效率,如泰州隆基乐叶CN201720080886.4IBC电池的电极互联结构,CN201710054876.8一种N型双面电池互联工艺;深圳市拉普拉斯能源技术有限公司CN201720292907.9无主栅太阳能电池组件。
目前无主栅组件的电池片的导线有两种方式固定于电池片上:
1是通过电镀工艺,如苏州太阳井新能源有限公司,CN201820959124.6一种无主栅双面电镀金属化太阳能电池片;
2.通过一个粘接膜将导线载住,在层压时固定在电池片上,如黄河水电光伏产业技术有限公司CN201510933299.0一种用于太阳能电池的无主栅焊带的制备方法。
另外,现有技术中的粘结膜通常为两层及以上的结构,一层为支撑层,一层为粘结层;粘结层提供粘结膜与焊带复合所需的粘结力以及粘结膜与电池片复合所需的粘结力。但是,采用两层及以上结构的粘结膜在光伏组件封装时,在高温下,支撑层与封装材料的连接容易出现分层的现象;另外,层结构多,必然会使得粘结膜中使用的成分多,进而对粘结膜的透光率、折射率和雾度的影响大,加工成本高,设备成本也高。
发明内容
本发明的目的是提供一种能够很好的将焊带粘结在电池片上且结构简单的焊带载体膜及其制备方法和应用。
为达到上述目的,本发明采用的技术方案是:
本发明一方面提供一种焊带载体膜,按质量百分比计,其原料配方包括50~99%的基体树脂、0~50%的增粘树脂、0~5%的助剂;所述的基体树脂为聚烯烃树脂及其弹性体、聚酯树脂及其弹性体、聚乙烯醇缩丁醛酯、乙烯-醋酸乙烯酯共聚物、乙烯-丙烯酸共聚物、离子聚合物、聚酰胺、氟树脂、及上述物质的改性物中的一种或多种;所述的增粘树脂为松香、氢化松香、石油树脂、氢化石油树脂、酚醛树脂、萜烯树脂中的一种或多种。
本发明中各类基体树脂的改性物可以是在基体树脂的基础上,利用其它单体(包括但不限于乙烯)或改性物(硅烷)对改基体树脂进行共聚、接枝等改性。
本发明中,聚烯烃树脂包括但不限于聚乙烯(PE)、高密度聚乙烯(HDPE)、低密度聚乙烯(LDPE)、线性低密度聚乙烯(LLDPE)中的一种或多种。
本发明中,聚烯烃弹性体包括但不限于OBC、POE、POP中的一种或多种。
本发明中,聚酯树脂包括但不限于聚对苯二甲酸乙二酯、聚对苯二甲酸丁二酯、聚对苯二甲酸二烯丙酯、聚对羟基苯甲酸酯中的一种或多种。
本发明中,聚酯弹性体包括但不限于聚氨酯弹性体、含有聚醚软段的共聚酯弹性体中的一种或多种。
本发明中,聚乙烯醇缩丁醛酯即PVB。
本发明中,乙烯-醋酸乙烯酯共聚物即EVA。
本发明中,乙烯-丙烯酸共聚物即EAA。
本发明中,离子聚合物包括但不限于聚合物树脂的钠离子、钾离子等的离子化聚合物。
本发明中,聚酰胺包括但不限于PA6、PA66、PA1212中的一种或多种。
本发明中,氟树脂包括但不限于PVF、PVDF、PTFE中的一种或多种。
根据一种实施方式,所述增粘树脂的含量>0。
根据该实施方式的优选方式,所述焊带载体膜的原料配方包括50~95%的基体树脂、0.1~50%的增粘树脂、0~5%的助剂。
进一步优选地,所述焊带载体膜的原料配方包括60~90%的基体树脂、5~39%的增粘树脂、0.1~5%的助剂。
更优选地,所述焊带载体膜的原料配方包括75~90%的基体树脂、5~20%的增粘树脂、0.1~5%的助剂。
根据另一种实施方式,所述增粘树脂的含量为0,此时,所述的基体树脂中至少一种为极性树脂。
根据该实施方式的优选方式,所述焊带载体膜的原料配方包括95~99.9%的基体树脂、0.1~5%的助剂。
进一步优选地,所述焊带载体膜的原料配方包括95~99%的基体树脂、1~5%的助剂。
优选地,所述的助剂包括引发剂、交联剂、硅烷偶联剂、光稳定剂、抗氧剂、紫外线吸收剂、开口剂、成核剂、增透剂、抗PID助剂中的一种或多种。
优选地,所述的焊带载体膜的厚度为20μm~500μm。
优选地,所述的焊带载体膜在波段为380~1100下的透光率≥80%,优选≥90%。
优选地,所述的焊带载体膜的单侧还设置有离型膜,和/或,所述的焊带载体膜的单侧压花。
本发明中,压花并非限定为压制成花纹,只要是能够使得焊带载体膜的表面粗糙的方式均可。
本发明中,离型膜或压花均形成在远离焊带的一层,而与焊带接触的一侧应尽量光滑。
进一步优选地,所述离型膜为常规离型膜,例如PE、PP、PET等,所述离型膜有色或者无色均可。
优选地,所述的焊带载体膜为交联型或非交联型;当所述的焊带载体膜为交联型时,所述的焊带载体膜的预交联度为≤60%,优选所述的焊带载体膜的两面的预交联度不同。
进一步优选地,当所述的焊带载体膜为交联型时,所述的基体树脂的熔点或者Tg温度≤150℃,当所述的焊带载体膜为非交联型时,所述的基体树脂的熔点或者Tg温度≥100℃。
本发明中,交联型和非交联型使用的基体树脂的熔点或者Tg温度的要求,是指基体树脂中至少部分树脂需要满足该要求。
进一步优选地,当所述的焊带载体膜为交联型时,所述的助剂包括引发剂、交联剂、硅烷偶联剂,以及光稳定剂、抗氧剂、紫外线吸收剂、开口剂、成核剂、增透剂、抗PID助剂中的一种或多种;当所述的焊带载体膜为非交联型时,所述的助剂包括引发剂、硅烷偶联剂、光稳定剂、抗氧剂、紫外线吸收剂、开口剂、成核剂、增透剂、抗PID助剂中的一种或多种。
更为优选地,当所述的焊带载体膜为非交联型时,所述的助剂为质量比为2~3:0.5~1.5:1的光稳定剂、抗氧剂、抗PID助剂;或者,所述的助剂为质量比为0.5~1.5:0.2~0.8:2~3:0.5~1.5:1的引发剂、偶联剂、光稳定剂、抗氧剂、抗PID助剂。
更为优选地,当所述的焊带载体膜为交联型时,所述的助剂为质量比为1:1~3:0.8~1.5:0.5~1:0.1~0.5:0.1~0.5的引发剂、交联剂、偶联剂、光稳定剂、抗氧剂、抗PID助剂。
本发明中,所述的引发剂包括但不限于三羟甲基丙烷三丙烯酸酯、2-三羟甲基丙烷四丙烯酸酯、乙氧化三羟甲基丙烷三丙烯酸酯、乙氧化三羟甲基丙烷三丙烯酸酯、丙氧化三羟甲基丙烷三丙烯酸酯、4-(二甲氨基)苯甲酸乙酯、过氧化二异丙苯(DCP)、2,5-二甲基-2,5-二(叔丁基过氧基)己烷中的一种或几种。
本发明中,所述的交联剂包括但不限于过氧化2-乙基己基碳酸叔丁酯、叔丁基过氧化-异丙基碳酸酯、过氧化二苯甲酰、过氧化二异丙苯、2,5-二甲基-2,5-双(叔丁基过氧基)己烷、过氧化环己酮、叔丁基过氧化氢、过氧苯甲酸叔丁酯、过氧乙酸叔丁酯、过氧重碳酸二-(4-叔丁基环己基)酯、叔丁基过氧化-3,5,5-三甲基己酸酯、三烯丙基异氰酸酯(TAIC)中的一种或几种。
本发明中,所述的偶联剂包括但不限于3-甲基丙烯酰氧基丙基甲基三甲氧基硅烷、3-缩水甘油丙基三甲氧基硅烷、乙烯基三甲氧基硅烷、3-氨丙基三乙氧基硅烷、乙烯基三甲氧基硅烷、三异硬脂酰基钛酸异丙酯、异丙基三(二辛基焦磷酸酰氧基)钛酸酯中的一种或几种。
本发明中,所述的光稳定剂包括但不限于双(2,2,6,6-四甲基-4-哌啶基)癸二酸酯(光稳定剂770)、聚丁二酸(4-羟基-2,2,6,6-四甲基-1-哌啶乙醇)酯、聚-{[6-[(1,1,3,3-四甲基丁基)-亚氨基]-1,3,5-三嗪-2,4-二基][2-(2,2,6,6-四甲基哌啶基)-氮基]-亚已基-[4-(2,2,6,6-四甲基哌啶基)-氨基]中的一种或几种。
本发明中,所述的抗氧剂包括但不限于酚系抗氧剂、亚磷酸酯系抗氧剂和受阻胺类抗氧剂中的一种或几种。
本发明中,抗PID助剂为金属离子捕捉剂。
本发明的第二方面是提供一种所述的焊带载体膜的制备方法,其通过混料,然后流延、压延或吹塑成膜,对于交联型的载体膜选择性地采用电子、原子、离子、中子、热或电磁辐照以控制所述的载体膜的预交联度;优选电子或电磁辐照。
本发明的第三方面是提供一种焊带复合体,包括所述的焊带载体膜,以及粘附在所述的焊带载体膜上的焊带;优选地,对于交联型载体膜,所述的载体膜与所述的焊带接触的一侧的预交联度小于远离所述的焊带一侧的预交联度。
优选地,所述的焊带的至少30%及以上的体积露出所述的焊带载体膜以使焊带能够很好的与电池片接触的同时保证焊带与载体膜的粘结性能。进一步优选地,所述的焊带的30%~70%的体积露出所述的焊带载体膜,更优选为所述的焊带的40%~60%的体积露出所述的焊带载体膜。
本发明的第四方面是提供一种电池片复合体,包括电池片、与所述的电池片接触的焊带、以及用于将所述的焊带固定在所述的电池片上的载体膜,所述的载体膜为所述的焊带载体膜;优选地,所述的电池片的两面分别设置有所述的焊带以及所述的载体膜。
优选地,所述的电池片为晶硅电池、非晶硅电池、化学太阳能电池、多元化合物薄膜太阳能电池等中的一种。
本发明的第五方面是提供一种电池片复合体的制备方法,包括如下步骤:
(1)控制温度在50~200℃下,通过压合将所述的焊带粘附在所述的载体膜上,控制压合时间为0.1~1s,且相邻两个所述的载体膜分别位于所述的焊带的两侧且间隔分布;
(2)对粘附有所述的载体膜的焊带进行裁切以形成焊带复合体单元,所述的焊带复合体单元由所述的焊带以及两个所述的载体膜组成;
(3)控制温度在50~300℃下,将所述的焊带复合体单元压合在电池片的表面,控制压合时间为0.2~3s;优选地,所述的电池片的两面分别压合有所述的焊带复合体单元。
优选地,当所述的载体膜上设置有离型膜时,所述的离型膜在步骤(1)之前或者步骤(3)之后去除。
本发明的第六方面是提供一种所述的焊带载体膜,或所述的焊带复合体、或所述的电池片复合体在光伏组件中的应用。
由于上述技术方案运用,本发明与现有技术相比具有下列优点:
本发明通过对载体膜配方的优化,使得载体膜可以制作成单层结构,在保证与焊带和电池片的粘结性能的同时,可以起到支撑作用,载体膜在层压时不会被焊带压穿,同时只有一种成分也增加了与封装胶膜的相容性。本发明的载体膜结构简单,生产成本以及设备成本低。同时通过改进的工艺,能够快速稳定的将载体膜与焊带相固定,方便下一步整个组件的层压。
附图说明
图1为载体膜形成的焊带复合体的结构示意图;
图2为电池片复合体的结构示意图;
其中,1、载体膜;4、焊带;5、电池片。
具体实施方式
下面结合具体实施例对本发明作进一步描述,但本发明并不限于以下实施例。实施例中采用的实施条件可以根据具体使用的不同要求做进一步调整,未注明的实施条件为本行业中的常规条件。下述实施例和对比例中的原料的份数均为质量份。
实施例1
1、载体膜1的原料配方为:基体树脂线性低密度聚乙烯(LLDPE)50份,POE 30份,氢化石油树脂20份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后流延成80μm薄膜,无需离型膜,可根据需要单面压花或不压花。
2、电池片复合体的制备
(1)将步骤1制得的载体膜裁1切成所需尺寸;
(2)控制温度在110℃以下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布从而便于焊带4与电池片5的粘结;
(3)对粘附有载体膜1的焊带4按照两个载体膜1为一个单元进行裁切形成一个焊带复合体单元;
(4)控制温度在150℃以下,将裁切后的焊带复合体单元压合在电池片5的表面,控制压合时间为1.5s;并使焊带4与电池片5接触,通过载体膜1将焊带4固定在电池片5的表面。一个焊带复合体单元压合在相邻两个电池片5的上下表面,一个电池片5的两面均压合有焊带复合体单元,结构如图2所示。
本实施例为非交联型载体膜,LLDPE量较大以提升整体耐温性,防止膜在与焊带粘合时被焊带压穿。
实施例2
1、载体膜1的原料配方为:基体树脂线性低密度聚乙烯(LLDPE)50份,POE 40份,氢化石油树脂10份,引发剂2,5-二甲基-2,5-二(叔丁基过氧基)己烷0.2份,硅烷偶联剂乙烯基三甲氧基硅烷1份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀,然后在双螺杆挤出机中进行接枝,接枝温度180-250℃,最后流延成80μm薄膜。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布从而便于焊带4与电池片5的粘结;
(3)对粘附有载体膜1的焊带4按照两个载体膜1为一个单元进行裁切形成一个焊带复合体单元;
(4)控制温度在150℃下,将裁切后的焊带复合体单元压合在电池片5的表面,控制压合时间为1.5s;并使焊带4与电池片5接触,通过载体膜1将焊带4固定在电池片5的表面。一个焊带复合体单元压合在相邻两个电池片5的上下表面,一个电池片5的两面均压合有焊带复合体单元。
本实施例为非交联型载体膜,添加引发剂和硅烷偶联剂以增加膜与电池片的粘结能力及膜本身耐温性,同时对基体树脂LLDPE进行接枝改性,在双螺杆挤出机中进行接枝,接枝温度180-250℃,可降低LLDPE结晶性,提升膜本身的透过率同时降低雾度。
实施例3
1、载体膜1的原料配方为:基体树脂POE 80份,氢化石油树脂20份,引发剂2,5-二甲基-2,5-二(叔丁基过氧基)己烷0.6份,交联剂TAIC 1份,硅烷偶联剂乙烯基三甲氧基硅烷0.6份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后放置4-8h保证助剂能够被树脂吸收完全,然后流延成80μm薄膜,最后对薄膜进行电子束辐照使产品的预交联度达到20%,同时在层压过程中可进一步交联。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布从而便于焊带4与电池片5的粘结;
(3)对粘附有载体膜1的焊带4按照两个载体膜1为一个单元进行裁切形成一个焊带复合体单元;
(4)控制温度在150℃下,将裁切后的焊带复合体单元压合在电池片5的表面,控制压合时间为1.5s;并使焊带4与电池片5接触,通过载体膜1将焊带4固定在电池片5的表面。一个焊带复合体单元压合在相邻两个电池片5的上下表面,一个电池片5的两面均压合有焊带复合体单元。
本实施例为交联型载体膜,预交联度20%,层压后交联度73%,基体树脂熔点70℃左右,20%的预交联度保证膜在与焊带粘合时不会被压穿,同时预交联度不能过高以保证膜与焊带及电池片的初粘性。
实施例4
1、载体膜1的原料配方为:基体树脂POE 60份,EAA 40份,引发剂2,5-二甲基-2,5-二(叔丁基过氧基)己烷0.6份,交联剂TAIC 1份,硅烷偶联剂乙烯基三甲氧基硅烷0.6份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后放置4-8h保证助剂能够被树脂吸收完全,然后流延成80μm薄膜,最后对薄膜进行电子束辐照使产品的预交联度达到20%,同时在层压过程中可进一步交联。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布从而便于焊带4与电池片5的粘结;
(3)对粘附有载体膜1的焊带4按照两个载体膜1为一个单元进行裁切形成一个焊带复合体单元;
(4)控制温度在150℃下,将裁切后的焊带复合体单元压合在电池片5的表面,控制压合时间为1.5s;并使焊带4与电池片5接触,通过载体膜1将焊带4固定在电池片5的表面。一个焊带复合体单元压合在相邻两个电池片5的上下表面,一个电池片5的两面均压合有焊带复合体单元。
本实施例为交联型载体膜,预交联度20%,层压后交联度75%,以极性材料EAA替代分子量较小的增粘树脂,保证与焊带及电池片的初粘性同时配合20%的预交联度,保证膜在与焊带粘合时不会被压穿。
对比例1
1、载体膜1的原料配方为:基体树脂线性低密度聚乙烯(LLDPE)100份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后流延成80μm薄膜。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布;但载体膜1与焊带4无法粘结;
(3)控制温度在150℃下,利用载体膜1将焊带4粘结在电池片5上,控制压合时间为1.5s;但载体膜1无法与电池片5粘结。
本实施例为非交联型载体膜,纯LLDPE薄膜,无极性低熔点树脂或增粘树脂,无法实现与焊带及电池片的粘结。
对比例2
1、载体膜1的原料配方为:基体树脂POE 100份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后流延成80μm薄膜。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,载体膜1被压穿。
本实施例为非交联型载体膜,纯POE薄膜,熔点70℃,在与焊带粘合时样品被焊带压穿。
对比例3
1、载体膜1的原料配方为:基体树脂POE 80份,氢化石油树脂20份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后流延成80μm薄膜。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,载体膜1被压穿。
本实施例为非交联型载体膜,基体树脂POE熔点70℃,同时添加20份氢化石油树脂,在与焊带粘合时样品被焊带压穿。
对比例4
1、载体膜1的原料配方为:基体树脂POE 80份,氢化石油树脂20份,引发剂2,5-二甲基-2,5-二(叔丁基过氧基)己烷0.6份,交联剂TAIC 1份,硅烷偶联剂乙烯基三甲氧基硅烷0.6份,0.5份光稳定剂770,0.2份抗氧剂1010,0.2份抗PID助剂;经高混机混合均匀后放置4-8h保证助剂能够被树脂吸收完全,然后流延成80μm薄膜,最后对薄膜进行电子束辐照使产品的预交联度达到65%,同时在层压过程中可进一步交联,交联度80%。
2、电池片复合体的制备
(1)将步骤1制得的载体膜1裁切成所需尺寸;
(2)控制温度在110℃下,通过压合将多根焊带4平行粘附在裁切后的载体膜1上,控制压合时间为0.5s,且相邻两个载体膜1分别粘附在焊带4的上下两侧且错开分布;但载体膜1与焊带4无法粘结;
(3)控制温度在150℃下,利用载体膜1将焊带4粘结在电池片5上,控制压合时间为1.5s;但载体膜1无法与电池片5粘结。
本实施例为交联型载体膜,预交联度65%,预交联度过高,无法实现与焊带及电池片粘结。
上述实施例和对比例制得的载体膜按照如下方法进行检测,检测结果见表1。
各性能的检测和评定方法如下:
收缩率:GB/T 13541-92;
透过率:IEC60664-1;
雾度:ISO 14782;
预交联度/交联度:溶剂法(二甲苯回流145℃,5h)
与焊带及电池片粘合情况:目测
表1
上述实施例只为说明本发明的技术构思及特点,其目的在于让熟悉此项技术的人士能够了解本发明的内容并据以实施,并不能以此限制本发明的保护范围。凡根据本发明精神实质所作的等效变化或修饰,都应涵盖在本发明的保护范围之内。
Claims (18)
1.一种焊带载体膜,其特征在于:所述的焊带载体膜为交联型或非交联型;
当所述的焊带载体膜为交联型时,所述的焊带载体膜的预交联度≥20%且≤60%,按质量百分比计,其原料配方包括50~99%的基体树脂、0~50%的增粘树脂、0~5%的助剂且所述助剂的含量不为0;当所述增粘树脂的含量为0时,所述的基体树脂为POE和EAA;当所述增粘树脂的含量不为0时,所述基体树脂为POE,所述的增粘树脂为松香、氢化松香、石油树脂、氢化石油树脂、酚醛树脂、萜烯树脂中的一种或多种;所述助剂为质量比为1:1~3:0.8~1.5:0.5~1:0.1~0.5:0.1~0.5的引发剂、交联剂、偶联剂、光稳定剂、抗氧剂、抗PID助剂;
当所述的焊带载体膜为非交联型时,按质量百分比计,其原料配方包括50~99%的基体树脂、0~50%的增粘树脂、0~5%的助剂且所述增粘树脂和所述助剂的含量均不为0;所述的基体树脂为线性低密度聚乙烯和POE且所述的基体树脂的熔点或者Tg温度≥100℃;所述的增粘树脂为松香、氢化松香、石油树脂、氢化石油树脂、酚醛树脂、萜烯树脂中的一种或多种;所述的助剂为质量比为2~3:0.5~1.5:1的光稳定剂、抗氧剂、抗PID助剂;或者,所述的助剂为质量比为0.5~1.5:0.2~0.8:2~3:0.5~1.5:1的引发剂、偶联剂、光稳定剂、抗氧剂、抗PID助剂。
2.根据权利要求1所述的焊带载体膜,其特征在于:所述的焊带载体膜的厚度为20μm~500μm;所述的焊带载体膜在波段为380~1100nm下的透光率≥80%。
3.根据权利要求2所述的焊带载体膜,其特征在于:所述的焊带载体膜在波段为380~1100nm下的透光率≥90%。
4.根据权利要求1所述的焊带载体膜,其特征在于:所述的焊带载体膜的单侧还设置有离型膜,和/或,所述的焊带载体膜的单侧压花。
5.根据权利要求1所述的焊带载体膜,其特征在于:当所述的焊带载体膜为交联型时,所述的焊带载体膜的两面的预交联度不同。
6.根据权利要求1所述的焊带载体膜,其特征在于:当所述的焊带载体膜为交联型时,所述的基体树脂的熔点或者Tg温度≤150℃。
7.一种如权利要求1至6中任一项所述的焊带载体膜的制备方法,其特征在于:其通过混料,然后流延、压延或吹塑成膜,对于交联型的载体膜选择性地采用电子、原子、离子、中子、热或电磁辐照以控制所述的载体膜的预交联度。
8.根据权利要求7所述的焊带载体膜的制备方法,其特征在于:采用电子或电磁辐照。
9.一种焊带复合体,其特征在于:包括权利要求1至6中任一项所述的焊带载体膜,以及粘附在所述的焊带载体膜上的焊带。
10.根据权利要求9所述的焊带复合体,其特征在于:对于交联型载体膜,所述的载体膜与所述的焊带接触的一侧的预交联度小于远离所述的焊带一侧的预交联度。
11.根据权利要求9所述的焊带复合体,其特征在于:所述的焊带的至少30%及以上的体积露出所述的焊带载体膜。
12.一种电池片复合体,其特征在于:包括电池片、与所述的电池片接触的焊带、以及用于将所述的焊带固定在所述的电池片上的载体膜,所述的载体膜为权利要求1至6中任一项所述的焊带载体膜。
13.根据权利要求12所述的电池片复合体,其特征在于:所述的电池片的两面分别设置有所述的焊带以及所述的载体膜。
14.根据权利要求12所述的电池片复合体,其特征在于:所述的电池片为晶硅电池、非晶硅电池、化学太阳能电池、多元化合物薄膜太阳能电池中的一种。
15.一种电池片复合体的制备方法,其特征在于:包括如下步骤:
控制温度在50~200℃下,通过压合将所述的焊带粘附在如权利要求1至6中任一项所述的载体膜上,控制压合时间为0.1~1s,且相邻两个所述的载体膜分别位于所述的焊带的两侧且间隔分布;
对粘附有所述的载体膜的焊带进行裁切以形成焊带复合体单元,所述的焊带复合体单元由所述的焊带以及两个所述的载体膜组成;
控制温度在50~300℃下,将所述的焊带复合体单元压合在电池片的表面,控制压合时间为0.2~3s。
16.根据权利要求15所述的电池片复合体的制备方法,其特征在于:所述的电池片的两面分别压合有所述的焊带复合体单元。
17.根据权利要求15所述的电池片复合体的制备方法,其特征在于:当所述的载体膜上设置有离型膜时,所述的离型膜在步骤(1)之前或者步骤(3)之后去除。
18.一种如权利要求1至6中任一项所述的焊带载体膜,或权利要求9至11中任一项所述的焊带复合体、或权利要求12至14中任一项所述的电池片复合体在光伏组件中的应用。
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