CN110819471A - 一种用于去除多晶切割线网厚片端面残胶的脱胶剂 - Google Patents
一种用于去除多晶切割线网厚片端面残胶的脱胶剂 Download PDFInfo
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Abstract
本发明涉及一种用于去除多晶切割线网厚片端面残胶的脱胶剂,由以下质量百分比的物质组成:有机酸占10‑30%;乳酸占2‑10%;异辛醇聚氧乙烯聚氧丙烯醚占0.1‑1%;二辛基磺化琥珀酸钠占0.1‑1%;1,6‑二苯基‑1,3,5‑己三烯占10‑30%;去离子水占40‑80%。所述脱胶剂的制备方法如下:将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、二辛基磺化琥珀酸钠;在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂。本发明提供了脱胶剂的配方和制备方法以及在生产过程中的使用方法,该去除多晶切割线网厚片端面残胶的脱胶剂,降低了成本,有效脱除残胶,最终达到清洁环保的效果。
Description
技术领域
本发明属于太阳能硅片技术领域,具体涉及一种用于去除多晶切割线网厚片端面残胶的脱胶剂。
背景技术
在太阳能硅片生产过程中,需要将硅锭切割成片状。目前主流采用金刚石线锯切割,进行切割前,首先通过胶水将硅锭与塑料板或树脂板粘接。完成切割后,将切割夹具、切割基板以及完成切割后的硅片一起放入脱胶机内,进行喷淋冲洗与脱胶,使硅片与胶水层完全分离。目前业内通用的脱胶工艺步骤为:(1)喷淋:采用一定压力的水对硅片进行喷淋,其目的在于冲洗覆盖在硅片表面的硅粉和切割液等;(2)水洗:在该工序的槽内,用水对硅片进行再次清洗;(3)脱胶:在脱胶槽内加入10%-20%的乳酸溶液,加热至75-85℃,浸泡10-20min完成脱胶。
采用乳酸脱胶主要有以下缺点:(1)由于晶砖两侧需要分线网进行切割,会产生1-3mm厚的线网厚片,使用乳酸无法将其从塑料板上脱除;(2)在粘棒过程中,两个晶砖之间线网厚片的间隙中,较难避免会残留些许粘棒胶,切割时会有硅粉粘附在其表面,乳酸无法将含有硅粉的胶层去除;(3)脱胶成本高,不环保。这些无法脱除胶层的线网厚片,目前需要通过高温(800℃)灼烧后使用清洗剂清洗后才能给料理回炉使用。额外增加较多成本,而且灼烧产生的废气也不容易处理,有一定的污染。
目前市场上的其他脱胶剂,一般存在不环保、很难脱除较厚胶层和含硅粉胶层等问题,因此需要研发一种更适用于线网厚片的脱胶剂。
通过在国内数据库进行“除胶剂”“除胶剂;硅”“除胶;金属”等关键词检索,直接用于多晶切割线网厚片端面除胶的除胶剂无涉及,多为高分子溶剂材料领域。其中:(1)申请号201110400752.3的专利《一种除胶剂及其制备方法和应用》中,除胶剂主要用于清除金属表层上耐高温胶,配方成分主要为主溶剂(碳酸二甲酯、乙基-3-乙氧基丙酸酯、二元酯、烷氧基醇、醇胺或苄醇中的一种或几种的组合物)、渗透剂、活化剂、缓蚀剂、增稠剂5%~15%、乳化剂、挥发抑制剂,余量为水;与本专利的配方不同。(2)申请号201610998156.2的专利《一种金刚线切割单/多晶硅棒用脱胶剂》,其脱胶剂主要配方为:聚丙烯酸、马来酸酐-丙烯酸共聚物、水解聚马来酸、异丙醇、丁醇、乙二醇等分散剂和溶剂。与本专利配方不同。且对比文献中的脱胶过程的时间、温度与本专利无重合。
发明内容
本发明的目的在于提供一种用于去除多晶切割线网厚片端面残胶的脱胶剂,该脱胶剂新型环保、成本低,将乳酸或一般脱胶剂无法脱除的线网厚片残胶,有效的脱除,避免由于高温灼烧带来的大气污染以及后清洗带来的额外水污染。
为了实现上述目的,本发明的技术方案如下。
一种用于去除多晶切割线网厚片端面残胶的脱胶剂,由以下质量百分比的物质组成:有机酸占10-30%;乳酸占2-10%;异辛醇聚氧乙烯聚氧丙烯醚占0.1-1%;二辛基磺化琥珀酸钠占0.1-1%;1,6-二苯基-1,3,5-己三烯占10-30%;去离子水占40-80%;有机酸为乙醇酸或者酒石酸。
其制备方法:将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、1,6-二苯基-1,3,5-己三烯;在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂。
使用方法步骤如下:
(1)在称取如上所述的脱胶剂,进行加热至60~90℃,然后将线网厚片水平放入或竖直放入上述混合液内脱胶1000s~3000s;
(2)取出步骤1中脱胶剂内的线网厚片,然后用纯水清洗干净后由料理回炉使用。
上述组分物料中,各物料功能如下:
1、有机酸为乙醇酸或者酒石酸,起到软化腐蚀胶层的作用,而且由于是小分子,其扩散速度快,另外酸度有缓冲作用,可以不使用缓蚀剂;
2、乳酸,辅助起到软化腐蚀胶层的作用;乳酸,IUPAC,2-羟基丙酸,是一种化合物,它在多种生物化学过程中起作用。它是一种羧酸,分子式是C3H6O3。它是一个含有羟基的羧酸。
3、异辛醇聚氧乙烯聚氧丙烯醚,具有良好润湿效果的离子型表面活性剂,对于许多底材如硅片,金属,玻璃等,有良好的润湿作用。比NP-10更环保,沸点更高,在长时间高温加热时不易挥发,能够长时间保持润湿能力。低含量情况下也可以形成胶束帮助分散颗粒物,而且硅片表面的油性物质也可以被乳化而清洗掉,具有一定的清洗作用;
4、二辛基磺化琥珀酸钠,阴离子表面活性剂,由于具有极强润湿性,分散性和乳化性,可使体系均一和稳定,而且它还具有抑泡功能,因此可以不使用消泡剂;
5、1,6-二苯基-1,3,5-己三烯,醇醚类溶剂,是一种含氧溶剂,主要是乙二醇和丙二醇的低碳醇醚。组成中既有醚键,又有羟基。前者具有亲油性,可溶解憎水化合物,后者具有亲水性,可溶解水溶性化合物。能够起到溶解胶层的作用;
该发明具有以下效果:本发明提供了脱胶剂的配方和制备方法以及在生产过程中的使用方法,该去除多晶切割线网厚片端面残胶的脱胶剂,降低了成本,有效脱除残胶,最终达到清洁环保的效果。
具体实施方式
下面结合实施例对本发明的具体实施方式进行描述,以便更好的理解本发明。
实施例1:
本实施例中的用于去除多晶切割线网厚片端面残胶的脱胶剂,按照质量百分比由以下物质组成:有机酸占15%;乳酸占2%;异辛醇聚氧乙烯聚氧丙烯醚占0.5%;二辛基磺化琥珀酸钠占1%;1,6-二苯基-1,3,5-己三烯占10%;去离子水占71.5%。有机酸为酒石酸。
本发明还提供了用于去除多晶切割线网厚片端面残胶的脱胶剂的制备方法,将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、1,6-二苯基-1,3,5-己三烯;在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂A1。
对比实施例1,取传统的乳酸作为脱胶剂B1。
实施例2:
本实施例采用的是一种线网厚片脱胶剂,按照质量百分比,其包括有机酸,20%;乳酸5%;异辛醇聚氧乙烯聚氧丙烯醚,0.5%;二辛基磺化琥珀酸钠,1%;1,6-二苯基-1,3,5-己三烯,18%;去离子水,55.5%。有机酸为乙醇酸。
本发明还提供了用于去除多晶切割线网厚片端面残胶的脱胶剂的制备方法,将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、1,6-二苯基-1,3,5-己三烯,在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂A2。
对比实施例2,取传统的柠檬酸作为脱胶剂B2。
实施例3:
本实施例采用的是一种线网厚片脱胶剂,按照质量百分比,其包括有机酸,25%;乳酸10%;异辛醇聚氧乙烯聚氧丙烯醚,0.5%;二辛基磺化琥珀酸钠,1%;1,6-二苯基-1,3,5-己三烯,30%;去离子水,33.5%。有机酸为乙醇酸。
本发明还提供了用于去除多晶切割线网厚片端面残胶的脱胶剂的制备方法,将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、1,6-二苯基-1,3,5-己三烯,在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂A3。
对比实施例3,取传统的甲基磺酸作为脱胶剂B3。
性能测试:
分别先将脱胶剂A1-A3和B1-B3加入300L的脱胶槽中,加热至85℃,分别将线网厚片150kg,放进脱胶槽中,脱胶时间2400-3600s,然后将厚片取出,放置在清洗机中水洗干净。再次循环放入150kg线网厚片进行如上脱胶,直至取出的厚片发现脱胶不良为止,累积统计已成功脱胶剥离的厚片的重量。其实验结果如表1所示。
表1为不同浓度的脱胶剂的脱胶效果
分别先将脱胶剂A1-A3加入300L的脱胶槽中,加热至不同温度,分别将线网厚片150kg,放进脱胶槽中,脱胶时间3000s,然后将厚片取出,放置在清洗机中水洗干净。再次循环放入150kg线网厚片进行如上脱胶,直至取出的厚片发现脱胶不良为止,累积统计已成功脱胶剥离的厚片的重量。其实验结果如表2所示。
表2为不同温度下脱胶剂的脱胶效果
以上所述是本发明的优选实施方式,应当指出,对于本技术领域的普通技术人员来说,在不脱离本发明原理的前提下,还可以做出若干改进和润饰,这些改进和润饰也视为本发明的保护范围。
Claims (3)
1.一种用于去除多晶切割线网厚片端面残胶的脱胶剂,其特征在于:由以下质量百分比的物质组成:有机酸占10-30%;乳酸占2-10%;异辛醇聚氧乙烯聚氧丙烯醚占0.1-1%;二辛基磺化琥珀酸钠占0.1-1%;1,6-二苯基-1,3,5-己三烯占10-30%;去离子水占40-80%;有机酸为乙醇酸或者酒石酸。
2.根据权利要求1所述的用于去除多晶切割线网厚片端面残胶的脱胶剂,其特征在于:所述脱胶剂的制备方法如下:将上述质量百分比的物料按照如下顺序放入反应釜内:去离子水、乳酸、有机酸、异辛醇聚氧乙烯聚氧丙烯醚、二辛基磺化琥珀酸钠、1,6-二苯基-1,3,5-己三烯;在室温下进行充分搅拌混合0.5小时,直至混合均匀获得所述脱胶剂。
3.根据权利要求1所述的用于去除多晶切割线网厚片端面残胶的脱胶剂,其特征在于:所述脱胶剂使用方法步骤如下:
(1)在称取如上所述的脱胶剂,进行加热至60~90℃,然后将线网厚片水平放入或竖直放入上述混合液内脱胶1000s~3000s;
(2)取出步骤1中脱胶剂内的线网厚片,然后用纯水清洗干净后由料理回炉使用。
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CN104862134A (zh) * | 2015-03-27 | 2015-08-26 | 武汉宜田科技发展有限公司 | 一种硅片脱胶剂、其制造方法和使用方法 |
CN109722672A (zh) * | 2017-10-27 | 2019-05-07 | 康准电子科技(昆山)有限公司 | 水基除胶剂 |
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CN104862134A (zh) * | 2015-03-27 | 2015-08-26 | 武汉宜田科技发展有限公司 | 一种硅片脱胶剂、其制造方法和使用方法 |
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