VW PV 3985 Plastics - Oxygen Gas Transmission Rate Through Plastic Film and Coating Using a Coulometric Sensor

The VW PV 3985 standard developed by Volkswagen automobile company defines a test method for determining the steady-state transmission rate of oxygen gas through plastics in the form of films, sheets, laminates, co-extrusions or plastic-coated papers or fabrics. This test method enables the determination of the oxygen gas transmission rate, the permeability of the film to oxygen gas and, in the case of homogeneous materials, the oxygen permeability coefficient.

The standard in question does not purport to address all safety issues, if any, associated with its use. It is the responsibility of the users of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory restrictions prior to use.

This test method is not claimed to be the only method for measuring oxygen gas delivery velocity. There are other methods for determining oxygen gas delivery velocity that utilize other oxygen sensors and procedures.

While designing the VW PV 3985 standard, the following standards developed by the American Testing and Materials Organization (ASTM) were taken as reference:

• ASTM D1434-82 Standard test method for determining gas permeability properties of plastic film and coating
• ASTM D1898-68 Standard practice for sampling plastics
• ASTM F1927-20 Standard test method for determining oxygen gas transmission rate, permeability, and permeability at controlled relative humidity through barrier materials using a coulometric detector

For the purposes of the VW PV 3985 standard,

• The oxygen permeability coefficient is the permeability of the film. and its thickness. Permeability only makes sense for homogeneous materials, in which case it is a property of bulk material.
• Oxygen permeability expresses the ratio of the oxygen transmission rate to the difference between the partial pressure of oxygen on the two sides of the film.
• The oxygen transmission rate expresses the amount of oxygen gas per unit time passing through the unit area of ​​the parallel surfaces of a plastic film under test conditions.

Among the numerous test, measurement, analysis and evaluation studies it has given to businesses in various sectors, our company provides oxygen gas transmission rate testing services through plastic film and coating, using a coulometric sensor, within the scope of VW PV 3985 standard, with its trained and expert staff and advanced technological equipment. also gives.