VAC-VBS is based on the differential pressure method, and is professionally applicable to the determination of gas transmission rate of films, sheeting, high barrier materials and aluminum foils.
Technical Specifications
| Specifications | Film Test |
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| Test Range | 0.1~100,000 cm3/m2·24h·0.1MPa (standard) |
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| Number of Specimens | 3 |
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| Vacuum Resolution | 0.1 Pa |
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| Vacuum Degree of Test Chamber | <20 Pa |
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| Test Temperature | 15°C~55°C (constant temperature controller is outside of supply scope) |
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| Accuracy | ±0.1°C |
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| Specimen Size | Φ80 mm |
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| Test Area | 28.27 cm2 |
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| Test Gas | O2, N2 and CO2 (outside of supply scope) |
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| Test Pressure | -0.1 MPa ~ +0.1 MPa (standard) |
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| Gas Supply Pressure | 0.4 MPa ~ 0.6 MPa |
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| Port Size | Φ6 mm PU Tubing |
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| Instrument Dimension | 670 mm (L) x 490 mm (W) x 350 mm (H) |
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| Power Supply | AC 220V 50Hz |
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| Net Weight | 57 kg |
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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 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/T 1038-2000, ASTM D1434, JIS K7126-1, YBB 00082003
This test instrument is applicable to the determination of gas permeability of:
| Basic Applications | Films
Including plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum foil composite films and many others |
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Sheeting
Including engineering plastics, rubber and building materials, e.g. PP, PVC, and PVDC |
| Extended Applications | Various Gases
Test the permeability of various types of gases, e.g. O2, CO2, N2, Air and He |
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Inflammable, Explosive Gases
Test the permeability of inflammable and explosive gases |
Biodegradable Films
Test gas permeability of various sorts of biodegradable films, e.g. starch-based biodegradable bags |
Materials for Aerospace Usage
This instrument can test the Helium permeability of airship gas bags |
Paper and Paper Board
Test gas permeability of paper and paper-plastic composite materials, e.g. aluminized paper for cigarette packages, Tetra Pak sheeting, paper bowls for instant noodles and disposable paper cups |
Paint Films
Test gas permeability of substrates coated paint films |
Glass Fiber Cloth and Paper
Including glass fiber cloth and paper materials, e.g. Teflon paint cloth, Teflon welding cloth and Teflon silicon rubber cloth |
Soft Tube Materials for Cosmetics
Including various types of cosmetic tubes, aluminum-plastic tubes and toothpaste tubes |
Rubber Sheeting
Including various sorts of rubber sheeting, e.g. car tires |