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UV紫外老化箱中紫外UV和VIS的区别


2024-07-20


UV紫外老化箱,另外又被叫作耐紫外线老化试验箱或抗紫外线老化检测箱等,本文将介绍有关于UV紫外老化箱中紫外UV和VIS(可见光)的区别主要体现在它们的光谱范围和对材料老化的影响上:

uv紫外老化箱

1.光谱范围:UV紫外光是指波长在100-400纳米之间的电磁辐射。根据波长的不同,紫外光被进一步划分为UVA(320-400 nm)、UVB(280-320 nm)和UVC(100-280 nm)。紫外光老化试验箱通常使用UVA-340、UVA-351和UVB-313灯管来模拟不同环境条件下的紫外光辐射。而可见光是指波长在400-700纳米之间的电磁辐射,是人眼可以感知的光。在紫外老化试验中,可见光部分通常不是主要关注的焦点,但它们也对材料的老化有一定的影响。

2.对材料老化的影响:UV紫外光,尤其是UVA和UVB波段,对材料的老化有显著影响。它们能够穿透材料表面,引发光化学反应,导致材料的化学键断裂、颜色变化、强度下降等老化现象。而可见光VIS虽然可见光的能量较低,但长时间的暴露也会对某些材料产生影响,如颜色变化和光泽度降低。

3.应用场景:UV紫外老化箱广泛应用于评估户外使用材料的耐候性,如涂料、塑料、橡胶、纺织品等。而可见光VIS某些特定应用中,如室内材料或通过玻璃窗暴露在阳光下的材料,可见光的影响也需要考虑。

4.试验条件:在紫外光老化试验中,试验条件如光照强度、温度、湿度等都会影响试验结果。常用的紫外光老化试验条件包括连续暴露、紫外/冷凝、紫外/喷淋等。而可见光VIS在某些特定的老化试验中,可能需要模拟可见光的影响,但这通常不是紫外老化试验箱的主要功能。

以上关于UV紫外老化箱中紫外UV和VIS的区别详细介绍。

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