G2/131 is based on the differential pressure method, and is professionally applicable to the determination of gas transmission rate, solubility coefficient, diffusion coefficient and permeability coefficient of plastic films, composite films, high barrier materials, sheets, and aluminum foils at different temperatures. The system is equipped with three diffusion cells, which could test specimens simultaneously with individual test results. The testing process conforms to GB, ISO, ASTM and other international standards.
|Test Range||0.05 ~ 50,000 cm3/m2·24h·0.1MPa|
|Temperature Range||15°C ~ 55°C ±0.5°C (room temperature 23°C)|
|Vacuum Degree of Test Chamber||<20 Pa|
|Number of Specimens||3 with independent test results|
|Specimen Size||Φ97 mm|
|Test Area||38.48 cm2|
|Test Gas||O2, N2 and CO2 (outside of supply scope)|
|Gas Supply Pressure||0.4 MPa~0.6 MPa|
|Port Size||Φ6 mm PU Tubing|
|Instrument Dimension||690 mm (L) x 350 mm (W) x 360 mm (H)|
|Power Supply||220VAC 50Hz / 120VAC 60Hz|
|Net Weight||71 kg|
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 instrument is applicable to the determination of gas permeability of:
Including plastic films, plastic composite films, paper-plastic composite films, coextruded films, aluminized films, aluminum foils, aluminum foil composite films and many others
Including engineering plastics, rubber and building materials, e.g. PP, PVC, and PVDC
Test the permeability of various types of gases, e.g. O2, CO2, N2, Air and He
Test the permeability of inflammable, explosive and poisonous gases
Test gas permeability of various sorts of biodegradable films, e.g. starch-based biodegradable bags
This instrument can test the Helium permeability of airship gas bags
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
Test gas permeability of substrates coated paint films
Including glass fiber cloth and paper materials, e.g. Teflon paint cloth, Teflon welding cloth, and Teflon silicon rubber cloth
Including various types of cosmetic tubes, aluminum-plastic tubes and toothpaste tubes
Including various sorts of rubber sheeting, e.g. car tires
G2/131 utilizes Labthink’s latest embedded computer control system that provides a better performance than traditional single chip system.
The instrument is equipped with Labthink's latest intelligent operating software, with user-friendly operating interface and intelligent data management. It also supports LystemTM Lab Data Sharing System, which ensures uniform management of test results and test reports.