Nitrogen permeability is the rate at which nitrogen passes through a sample of material. Nitrogen permeability measurements are frequently used as an indicator for general air permeability. In cases where the speed is very slow, measurement is made by manometric, gas chromatography or mass spectrometric techniques. Pressure and flow measurements are used at higher velocities.
A permeability meter device is used to measure the nitrogen permeability of the materials. This device is based on a modular approach designed to facilitate customization. That's why every device is manufactured in a variety of options to suit the customer's specific application. These instruments are supplied with up to three standard sized measuring chambers suitable for flat samples such as films or containers. With the nitrogen permeability meter, even low permeability rates are measured quickly and with high accuracy. A number of nitrogen sensors are used to determine the permeability of the films, depending on the specific needs.
The ISO 15105 standard, developed by the International Standards Organization (ISO), describes a test method for determining the nitrogen transmission rate from flat plastic materials such as films, sheets, laminates and coated materials under differential pressure. According to this test method, the sample is mounted in a permeability cell to form a barrier between the two chambers, and both chambers are emptied. Next, a chamber is filled with test gas. In the other chamber, the pressure increases due to conduction from the sample. The permeability rate is calculated based on the pressure increase. The detection limit also depends on the structure and thickness of the sample. At very low permeability rates, it is recommended to measure with an increased partial pressure differential to shorten measurement times.
It is used to determine the gas permeability properties of plastic film and coating. another international standard is the ASTM D1434 standard (ASTM D1434-82 Standard test method for determining the gas permeability properties of plastic film and coating) developed by the American Society for Testing and Materials (ASTM). This test method involves determining the steady-state transmission rate of a gas through plastics in the form of film, sheet, laminates, and plastic-coated papers or fabrics.
Our organization also provides nitrogen permeability analysis services with its trained and expert staff and advanced technological equipment, among the numerous test, measurement, analysis and evaluation studies it provides for businesses in various sectors.
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