什么是UV无影胶,UV无影胶怎么使用?

2024-11-06 11:40:47
推荐回答(4个)
回答(1):

uv固化胶
是紫外光固化胶,一种必须通过紫外线光照射才能固化的一类胶粘剂。

使用方法:
1 、将被粘接的两物体有一个是透明的且表面清洗干净、干燥并无油脂;
2 、将UV无影胶涂在其中的一个表面上,合拢两平面,用合适波长(通常为365nm-400nm)及能量的紫外灯或照明用高压汞灯进行照射,光照时要从中央向周边,并确认光线确实能照透至粘合部位;
3 、建议光照6s左右、初步定位时,去除工件上剩余胶水再重新光照至完全固化;

回答(2):

通过紫外线灯,光固化的。

回答(3):

通过紫外线灯,光照射固化的。

回答(4):

UV是紫外线Ultra-Violet Ray的缩写 , 是波长在200-450nm的这段光线。其中UVA波长在315-400mm之间,UVB波长在280-315nm之间,UVC波长在 200-280nm之间。UV胶,全称UV光固化胶水,又叫无影胶或紫外线胶水,是一种单组分UV光固化改性丙烯酸脂结构胶。它是一种需用紫外线(UVA)固化的胶水,主要用于玻璃、水晶、金属、塑料等材料的粘接。要求被粘接的两种物体中须有一种为透明材质,从而保证紫外线顺利照射到胶体并使之固化。UV胶固化后胶层无色透明,能充分体现被粘接材料本身的特色,是名副其实的“无影胶”,因此被广泛应用于各种对强度和美观等要求较高的物体的粘接,是电子产品、医疗器械、家具、工艺品等生产制造过程中不可或缺的粘接剂。近年来,UV胶水更被大量应用于强化玻璃移门、冰晶画、写真影像的生产制作,从而使之在更广阔的天地里施展其“无影”的本领。
UV胶由齐聚体、单体、光引发剂、助剂等化学成分组成。主要成份:齐聚体:30~50%(齐聚体有:环氧丙烯酸酯,聚氨酯丙烯酸酯);丙烯酸酯单体:40~60%;光引发剂:1~6%;助剂:0.2~1%。
UV胶水性能特点:固化快、反应可控;无溶剂、无污染;适合自动化作业;粘接范围广、粘接强度高、使用面广;光学性能优;胶体无色透明、固化后透明率 ≥ 90%;耐候性好,不黄变。
UV胶水固化原理和固化条件:UV胶水中的光引发剂(光敏剂)在紫外线的照射下吸收紫外线光后产生活性自由基或阳离子,引发单体聚合、交联和接支化学反应,使粘合剂在数秒种内由液态转化为固态;UV胶水必须在波长为200-400nm的紫外线照射下固化。
UV无影胶的使用方法:

1、确保被粘接的两个物体有一个是透明的。
2、被粘接的两个物体的表面必须是无油污、无水分。
3、将胶水均匀的涂抹的被粘接的两个物体的接触面上。
4、轻轻按压、排除气泡和多余的无影胶。
5、擦除溢出的无影胶。
6、用波长在365-400NM的紫外线灯照射无影胶2-10分钟左右,玻璃和水晶照射时间相对较短,亚克力、PC板照射时间相对长一些。

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