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Application steps of rubber low temperature brittleness tester at - 100 ℃

Source: Yangzhou jingzhuo experimental Machinery Factory Time of publication: Release time: July 11, 2020 Reading times: 378 times


Application steps of rubber low temperature brittleness tester at - 100 ℃

Type jz-6043 Rubber low temperature brittleness tester It is generally used to measure the brittleness temperature of materials, Rubber low temperature brittleness tester The performance of non rigid plastics and other elastic materials at low temperature can be compared. The following is a detailed introduction Rubber low temperature brittleness tester How to use it.

? 1. Turn on the power, and the temperature controller and timer display lights will be on.

? 2. The cold well is injected with frozen medium (generally industrial ethanol), and the injection amount should ensure that the distance from the lower end of the gripper to the liquid level is 75 ± 10 mm.

? 3. Clamp the specimen vertically on the holder. The clamp should not be too tight or too loose to prevent the specimen from deformation or falling off.

? 4. Press the holder to freeze the sample, and start the timing control switch (or press the stopwatch) to time. The freezing time of the sample is 3.0 ± 0.5min. During the freezing period, the temperature fluctuation of freezing medium shall not exceed ± 1 ℃.

5. Lift the lifting gripper so that the impactor impacts the specimen within half a second.

? 6. Take down the sample, bend the sample to 180 ° according to the impact direction, and carefully observe whether there is any damage.

? 7. After the sample is impacted (only one impact is allowed for each sample), the temperature of the frozen medium shall be increased in case of damage, otherwise, the temperature of the freezing medium shall be reduced and the test shall be continued.

Through repeated tests, the minimum temperature for at least two specimens not to be damaged and the high temperature for at least one specimen to be damaged are determined. If the difference between the two results is no more than 1 ℃, the test is over.


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