VW PV 3909 – elongation (accredited)

Our test laboratory performs testing in accordance with the Volkswagen standard VW PV 3909 using an accredited procedure. This test method describes a procedure for determining the static elongation and the permanent elongation of non-metallic sheet materials typically used in vehicle interiors. These include, among others, textile materials, nonwovens, coated textiles, artificial leather, and other flexible interior materials.

During the test, standardized specimens are taken from the material under investigation and conditioned under defined climatic conditions. The specimens are then clamped in a tensile testing machine and subjected to a specified tensile load. During loading, the elongation of the material under load is measured. After unloading the specimen, the permanent elongation is additionally determined, i.e. the permanent change in length that remains in the material after a defined relaxation period. This procedure allows both the elastic and plastic deformation components of the material to be quantified.

Testing according to VW PV 3909 provides important parameters describing the elongation and recovery behavior of sheet materials and enables an assessment of their mechanical performance and dimensional stability under tensile stress.