uv胶变黄是什么原因？怎么避免UV胶发黄？

有效避免uv胶黄变的方法就是在uv胶配方中添加抗氧剂和紫外线吸收剂，可避免与延迟黄变现象的发生。由于抗氧剂的种类比较多，需要一定的技术与经历积聚，才能从中选取适用的产品。

抗氧剂的分类有：

1、主抗氧剂：主抗氧剂捕捉过氧化自由基，主要有受阻酚抗氧剂。

2、辅佐抗氧剂：辅佐抗氧剂分解氢过氧化物，主要有亚磷酸酯类、硫代酯类。

一般状况下，依据各个uv胶生产厂家的生产工艺、原料、溶剂、助剂、填料、哪个阶段的黄变及黄变水平的不同，而使用不同的抗氧剂。

总而言之，抗氧剂和紫外线吸收剂的使用不一定能从基本上解决uv胶黄变问题，但是在一定的使用环境及条件内，还是能比较有效地避免产品氧化黄变。

UV胶黄变主要是由什么原因造成的？

1、被粘接的材料表面清理不干净会导致胶水变黄；

2、UV固化设备的功率过高或是固化时间过长；

3、UV无影胶还没有完全固化；

4、UV胶因为是特殊定制所以本身就是黄色；

5、胶水储存时间过长导致胶水变黄；

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Effective method to avoid the uv glue yellowing is added in the uv glue formula antioxidant and uv absorber, can avoid and yellowing of delay. Due to the kinds of antioxidants is more, need certain technology and experience accumulation, can choose the suitable products.

The classification of antioxidants are:

1, the main antioxidant: the main antioxidant capture superoxide free radicals, basically have hindered phenol antioxidant.

2, for antioxidants: for antioxidant decomposition of hydrogen peroxide, phosphite ester, ester and main.

General situation, on the basis of various uv glue manufacturer's production process, raw materials, solvents, additives and fillers, which stage of yellowing and yellowing level is different, the use of different antioxidants.

In short, the use of antioxidant and uv absorber can not basically solve the problem of uv glue yellowing, but in the use of a certain environment and conditions, or yellowing can more effectively prevent product oxidation.

The UV glue yellowing is mainly caused by what reason?

1, the adhesive material surface cleaning not clean will cause yellow glue;

2, UV curing equipment power is too high or curing time is too long;

3, UV shadowless glue is still not fully curing;

4, UV glue, because is a special custom itself is yellow;

5, glue storage time is too long to turn yellow glue;

标签：uv胶变黄UV胶黄变处理