The VW PV 3920 standard developed by Volkswagen automobile company defines a test method (photometric method) for the determination of condensable components in non-metallic materials used in vehicle interiors.
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Fogging (fogging) is the effect caused by the condensation of different volatile organic compounds (VOC) gases that can evaporate from the upholstery materials inside the vehicle. The presence of these volatile organic compounds in these environments must be limited, so it is extremely important to evaluate all interior and ventilation system materials.
The fogging properties of the upholstery material in the vehicle are generally determined by a test procedure using two different methods:
In the photometric method, specular gloss is measured to determine the change in reflective index of 60 degrees before and after the test sample is placed in a beaker covered with a piece of chilled glass, and the bottom of the beaker is placed in a controlled temperature oil bath for a specified period of time.
In the gravimetric method, condensation is calculated using an aluminum foil disc instead of a piece of glass to cover the beaker in the test sample. The disc is weighed before and after the test to determine the change in weight. The controlled heating unit has different holes to hold test sample beakers.
Another international standard for the determination of fogging properties is ISO 6452 Rubber or plastic coated fabrics - Determination of fogging properties of trim materials in the interior of cars, developed by the International Standards Organization (ISO). This standard also describes a test method for determining the fogging properties of rubber or plastic coated fabrics used as coating material in the interior of motor vehicles.
These test methods are also applied to liquid, pasty, powdery or solid raw materials that are the basis of flooring materials or from which materials are produced. It can also be applied to other materials and finished products.
Among the numerous test, measurement, analysis and evaluation studies it has given for businesses in various sectors, our organization, with its trained and expert staff and advanced technological equipment, aims to determine the condensable components (photometric method) in non-metallic materials used in vehicle interiors within the scope of VW PV 3920 standard. ) also provides testing services.
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