When the Xenon lamp weatherproof test box is used for aging test, the surface temperature of the sample is an important exposure parameter. Generally, the high temperature will accelerate the degradation process of the polymer. The allowable test temperature should be determined according to the test material and the aging performance evaluation index. The following Yashilin instruments introduce the two exposure methods of the Xenon weatherproof test chamber. Other methods can be used by the user, but the exposure conditions should be stated in the test conditions.
The exposure method refers to the cyclic test of the sample after a period of light exposure, followed by the non-irradiation period. The test period is stipulated by relevant standards. If there is no specified cycle condition, it is recommended to use the following cycle at a black standard temperature of 63 ° C. The exposure was 4h or 8h, and then exposed to radiation at a black standard temperature of 50 ° C for 4 h.
The two exposure methods for the xenon lamp weatherproof test chamber are:
1. The exposed surface of the sample is wetted by a moisture condenser in the equipment.
2. When the equipment does not meet the exposure mode 1, the method of providing a method of controlling the relative humidity in the exposed room or spraying the sample with a blunt water or a simulated acid rain aqueous solution may be adopted.
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