For most packaging materials, they should have good barrier property to protect the content from oxygen in the air or preven the inner gases transmitting through the packaging. To determine the product shelf life or to improve the packaging materials, the first thing you need to do is to know what's current property of your packaging materials, that is to say, you need to know what about the gas barrier property of your current packaging materials.
Labthink develops and manufactures professional gas barrier property test systems. Conforming to different international standards, labthink has gas permeability testers based on equal pressure method and differential pressure method. Also according to clients different requirement on test efficiency requirements, Labthink Gas barrier property test systems are designed with 1, 3, or 6 testing cells in one instrument, which can test multiple samples in one operations. G2/132 Gas Permeability Tester is one of gas barrier property tester that is based on differential pressure method and has three testing cells with independent testing results.
Principle
The pre-conditioned specimen is mounted in the gas diffusion cell as to form a sealed barrier between two chambers. The lower-pressure chamber is firstly evacuated, followed by the evacuation of the entire cell. A flow of gas is thereafter introduced into the evacuated higher-pressure chamber and a constant pressure difference is generated between the two chambers. The gas permeates through the specimen from higher pressure side into the lower side. The gas permeability and other barrier properties of the specimen can be obtained by monitoring the pressure changes in the lower chamber.
This Gas Permeability Tester is equipped with three diffusion cells, which could generate test results of three equivalent specimens at one operation, and conforms to ISO 2556, ISO 15105-1, GB/T 1038-2000, ASTM D1434
Technical specifications
| Specifications | Film Test |
|---|---|
| Test Range | 0.01~150,000 cm3/m2·24h·0.1MPa |
| Temperature Range | 15°C~55°C (room temperature 23°C) |
| Temperature Accuracy | ±0.1°C (standard) |
| Humidity Range | 0%RH, 2%~98.5%RH, 100%RH (humidity generator is not in our supply scope) |
| Humidity Accuracy | ±1%RH |
| Vacuum Accuracy | 0.1Pa |
| Vacuum Degree of Test Chamber | <20Pa |
| Number of Specimens | 3 |
| Specimen Size | Φ97 mm |
| Test Area | 115.44 cm2 |
| Test Gas | O2, N2 and CO2 (not in supply scope) |
| Test Pressure | -0.1MPa~+0.1MPa |
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