Leak detection of medicinal composite film bags
Due to the influence of many factors in the production process, the composite bag may cause leakage sealing during sealing. Pressing or cracking of the material itself. The internal and external communicating pores formed by the micropores will produce the contents of the package. Negative Effects. At present, the standard test method for detecting the leak of flexible packaging by bubbling method is adopted.
1 Inject clean water into the vacuum chamber, the height exceeds the surface of the bottom plate on the cylinder head, and put the sample. The distance between the top surface of the sample and the water surface should not be lower than 25 mm to ensure the sealing effect, and sprinkle a little water on the sealing ring.
2 Cover the sealing cover of the vacuum chamber, turn the switch on the tester to the open position, adjust the control 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.
3 When the required pressure is reached, turn the tester's switch to the off position, keep the vacuum, the timer starts to time, observe the sample, and reach the dwell time.
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 .
4 Leakage of the sample during vacuum evacuation and 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.
5 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.
Features:
1. Microcomputer control, automation of the experimental process
2. Liquid crystal display mode, pressure and pressure holding time at a glance
3.PVC operation panel, membrane button, easy to operate
4. High quality thickened plexiglass sealed barrel with wall thickness 15mm
5. Digital preset test vacuum and vacuum hold time
6. Precision pneumatic components, excellent sealing performance
7. Automatic constant pressure qi, no manual operation
8. Configure the micro printer, the experimental results print directly
Technical Parameters:
1. Vacuum degree: -90~0kPa
2. Precision: Level 1
3. Effective size of vacuum chamber: Φ270mm × 200 mm (H) (standard)
Note: Other sizes can be customized.
4. Air source pressure: 0.7MPa (air source user own)
5. Air source interface: Φ6 polyurethane tube
6. Dimensions: 420mm (L) × 320mm (B) × 520mm (H)
7. Power: AC 220V 50Hz
8. Net weight: 15kg
Standard configuration: host experiment sealed barrel air source line
According to the standard: GB/T 15171, ASTM D3078
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