(1) cleaning process for organic solvent cleaning
有机溶剂清洁剂(超声波)-水基清洗剂(超声波)-市水漂洗-纯水漂洗-IPA(异丙醇)脱水-IPA慢拉枯燥。
有机溶剂清洗剂的主要用途是清洗沥青及漆片。以前的溶剂清洗剂多采用三氯乙烷或三氯乙烯。由于三氯乙烷属ODS(消耗臭氧层物质)产品,目前处于强迫淘汰阶段;而临时使 用三氯乙烯易招致职业病,而且由于三氯乙烯很不稳定,容易水解呈酸性,因此会腐蚀镜片及设备。对此,本司研制生产了非ODS溶剂型系列清洗剂,可用于清洗光学玻璃;并且该 系列产品具有不同的物化指标,可有效满足不同设备及工艺条件的要求。比如在少数企业的生产进程中,镜片表面有一层很难处置的漆片,要求使用具有特殊溶解性的有机溶剂; 部分企业的清洗设备的溶剂清洗槽冷凝管较少,自由程很短,要求使用挥发较慢的有机溶剂;另一部分企业则相反,要求使用挥发较快的有机溶剂等。
(2)水基清洁剂的主要用途是清洗研磨粉
由于研磨粉是碱金属氧化物,溶剂对其清洗才能很弱,所以镜片加工进程中发生的研磨粉根本上是在水基清洗单元内除去的,故而对水基清洁剂提出了极高的要求。以前由于 国际的光学玻璃专用水基清洗剂种类较少,很多外资企业都选用出口的清洗剂。而目前国际已有公司开收回光学玻璃清洗剂,并成功地应用在国际数家大型光学玻璃生产厂,清洗 效果完全可以取代出口产品,在腐蚀性(防腐性能)等指标上更是优于出口产品。
关于IPA慢拉枯燥,需要说明的一点是,某些种类的镜片枯燥后容易发生水印,这种现象一方面与IPA的纯度及空气湿度有关,另一方面与清洗设备有较大的关系,尤其是双臂 枯燥的效果分明不如单臂枯燥的好,需要设备厂家及用户注意此点。
This article is from:www.newstar- china.com/
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