What is the leak of the sealer during the test?

In the sealing device during use, if any leakage phenomenon, first check whether the sealing cover lid sealing device, sealing device is within a seal groove seal the tub, the tub if the sealing ring is not within the recess There will be a gap after the lid is sealed, but there will be a leak in the experiment.

The operation method of the sealer test is detailed: the clean water is injected into the vacuum chamber, the height exceeds the surface of the bottom plate on the cylinder head, and the sample is placed. At this time, the distance between the top surface of the sample and the water surface must not be lower than 25 mm to ensure the sealing effect. Sprinkle a little water on the seal.

Cover the sealing cover of the vacuum chamber, turn the switch on the tester to the open position, adjust the control adjustment knob of the tester (see above for adjustment method), observe the vacuum pressure gauge, and adjust the pressure to the stable value required for the test.

Note: As long as the leakage of each part of the sample can be observed during the test, two or more samples can be tested at one time.

To reach the required pressure, turn the tester's switch to the off position, maintain the vacuum, start the timer, and observe the sample until the hold time is reached.

Note: The adjusted vacuum value is determined according to the characteristics of the sample (such as the packaging materials used, the sealing conditions, etc.) or the relevant product standards.

The leakage of the sample during the vacuuming process and after the vacuum is maintained after the preset vacuum is reached, depending on whether or not continuous bubbles are generated. A single isolated bubble is generally not considered a sample leak.

When the pressure holding time is reached, the switch on the instrument is turned to the off position, the vacuum is removed, the sealing cover is opened, the test sample is taken out, the water on the surface is wiped clean, and the surface damage result of the packaging bag is observed.

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