The sample requirements for the ozone aging test box test: sample size, sampling, and number of samples.
Sample size: The sample should have sufficient size to meet the evaluation of the exposed surface after the test and the comparison of different samples. Preference is given to samples with a length of 10 mm and a width of 25 mm (Note: It is better to select the sample size according to the inner diameter of the equipment). Since the ozone aging test chamber is divided into static and dynamic sample holders, the static is to stretch the tested sample It is better to fix it directly on the upper and lower to perform the aging test, and the dynamic ozone aging test box is tested through the transmission device during the experiment while stretching. The above two factors should be taken into account before selecting the test.
Sampling: Sampling according to HG / T 3050.1, the sample is cut at least 50mm away from the edge of the coated fabric, the sample should represent the entire batch of goods as much as possible. The sample can be calculated by the size of the volume and the number of turntables. Turntable and tray.
Number of samples: Take three samples in each direction of each coated surface of the fabric. The standard ozone aging test box has 6 turntables and 12 large ones. It can also be customized according to customer requirements. If the product is larger, it can be partitioned, and the rubber and plastic parts can be placed directly on it for aging experiment.
Attachment: small knowledge-time interval before experiment:
Unless otherwise specified for technical reasons, the following time interval requirements should be observed:
For non-product tests, the shortest time from manufacturing to the start of the test should be 16h, and the longest time from manufacturing to the test should be four weeks.
For the product test, the shortest time from manufacturing to the start of the test should be 120h, during which the sample should be stored at standard laboratory temperature. The maximum time from manufacturing to the start of the test should be three months, and the maximum interval between the date the laboratory receives the product and the start of the test should be two months.
The qualification test for the ozone aging test box should be carried out at the same time interval and the same temperature as much as possible.
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