UV aging test box requirements

The test method of the ultraviolet aging test box is mentioned in the instructions for the use of the equipment, while the UV aging test box is relatively strict in the use of the same time, then Ashley briefly explains the use requirements of the ultraviolet aging test box .

The two test methods still have the following requirements:
★ Fluorescent ultraviolet test ★ The maximum thickness of the test sample should not exceed 20mm to ensure sufficient heat exchange to cause condensation on the test sample.
★ Strip test specimens such as plastics and rubbers should be fixed on aluminum alloy or other panels that are resistant to corrosion and transmission.
★ For paint test specimens on the steel floor, the rust on the edges should not stain the surface of the test specimen.
★ The hole larger than 1mm on the test sample should be sealed to prevent water vapor from escaping.
★ Deuterium lamp test sample requirements: The test sample should not be subjected to external pressure on the sample holder. To avoid the different surface illumination intensity due to the different exposure position of the test sample, when the test sample is installed, it should be based on the size of the test sample. And shape, reasonably arranged and fixed on the rotating bracket, and can change the position, as the lower row swap, in place 180 ° flip, upper and lower row exchange, 180 ° flip in place, after a four-step-exchange cycle. In the swap cycle, the exchange time is equal for each step.
★ Appraisal of the appearance of the ultraviolet aging test box: The evaluation of the coating is mainly the appearance, plastic and rubber can also be evaluated when necessary. The inspection items are mainly gloss, color change (color difference), chalking, spots, blistering, cracks. And dimensional stability, etc., should try to use the instrument for quantitative project testing, such as gloss, color, etc.
★Measurement of mechanical properties and other properties: General rubber materials are measured for tensile strength, elongation, hardness, plastic impact strength, elongation at break, tensile strength, and bending strength. If necessary, other performance test items can be specified.

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