After the test in the high and low temperature test chamber is completed, the relevant standards should specify whether the recovery process should be carried out under the standard atmospheric conditions for the test or under controlled recovery conditions. If controlled recovery conditions are required, the test samples can be transferred to another box In the former case, the conversion time should be as short as possible, and it should not exceed 10min. In the latter case, the relative humidity should be reduced to 75% plus or minus within 1H. 2. Then adjust the temperature to the laboratory temperature ± 1K in another 1h. For large test samples, the relevant standards can allow a longer conversion time. The recovery time calculation (1H-2H) is from the specified recovery conditions Counting from the time of arrival, if the test sample has a large thermal time constant, a sufficient recovery period can be allowed to achieve a stable temperature. The relevant standard should state whether any special measures should be used to remove the moisture on the surface of the test sample.
The samples should be visually inspected and performance tested according to the relevant specifications. The testing should be performed immediately after the recovery period, and the parameters most sensitive to relative humidity should be measured first, unless there are relevant regulations, all parameters should be measured within 30min Completion, when the test is included in the relevant regulations, a report should be provided based on the following information: rigorous procedures, temperature and number of cycles, initial testing, condition of the sample in the condition test, the condition of the mounting frame or support, method 1 or 2, intermediate Detection, recovery time, measures taken to remove surface moisture, visual inspection and performance test conducted after the test, the parameters that should be measured first, and the maximum time allowed for the final measurement of all parameters in the high and low temperature test chamber.
Attachment: Two cooling methods are provided in this test
Method 1: The temperature decrease rate should be strictly controlled at the beginning of 90 minutes, and the relative humidity should not be less than 95%. Except for the initial 15 minutes of not less than 90%, this method requires a special test chamber. Method 1 is especially suitable for the cause of respiration Moisture-vapor-permeable samples, such as those that form condensed inner voids on the inner surface.
Method 2 has good reproducibility for other samples. Further information about the damp heat test including stability and alternation can be obtained from GB / T 2424.2-2005.
ESONE New Materials Co.,Ltd has developed a full range of open mesh belting products, mesh size ranging from 1x1mm, 2x2mm, 2x2.5mm, 4x4mm, 6x6mm, 8x8mm to 10x10mm.
And ESONE open mesh belt is using fiberglass, Kevlar or Nomex as basic material, offering PTFE belt with high mechanical strength in order to meet the high request.
Our open mesh Belts are widely used for flooring, drying, screen printing, non woven fabric, food processing, heat sealing packing, glass manufacturing, wood processing industry, which can provide a high percentage of open surface area, creating maximum airflow and sufficient operation with minimum heat loss. Width and length stability of the belts are retain over full range of operating temperature.
PTFE Mesh Conveyor Belt, Teflon Belt, PTFE Conveyor Belt, Teflon Mesh Belt
Jiangsu Esone New Material Co,.Ltd , https://www.cookware-manufacturer.com