General Info
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 the 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.
Standards
This test instrument conforms to the following standards:
ISO 15105-1, ISO 2556, GB/T1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003
Technical Specifications
| Specifications | Film Test |
|---|---|
| Test Range | 0.1~100,000 cm3/m2·24h·0.1MPa (standard volume) |
| At least 600,000 cm3/m2·24h·0.1MPa (extended volume) | |
| Number of Specimens | 1 |
| Vacuum Resolution | 0.1 Pa |
| Vacuum Degree of Test Chamber | <20 Pa |
| Temperature | Room temperature~50°C |
| Accuracy | ±0.1°C |
| Specimen Size | Φ97 mm |
| Test Area | 38.48 cm2 (Φ70 mm) |
| Test Gas | O2, N2 and CO2 (outside of supply scope) |
| Test Pressure | -0.1 MPa~+0.1 MPa (standard) |
| Gas Supply Pressure | 0.4 MPa~0.6 MPa |
| Port Size | Φ6 mm PU Tubing |
| Instrument Dimension | 680 mm (L) x 565 mm (W) x 550 mm (H) |
| Power Supply | AC 220V 50Hz |
| Net Weight | 130 kg |
Download PDF File