DIN EN ISO 3386-2 (accredited)

Our test laboratory performs testing in accordance with DIN EN ISO 3386-2 using an accredited procedure. This standard specifies a standardized test method for determining the compressive stress–strain properties of flexible cellular materials with higher density. The aim of the test is to characterize the load-bearing properties and deformation behavior under compressive stress, particularly for materials that exhibit a significantly higher resistance to compression compared to low-density foams.

In contrast to DIN EN ISO 3386-1, which is designed for softer, low-density foams, Part 2 specifically addresses more compact, higher-density, and structurally more stable foam systems that are used under higher mechanical loads. The method is therefore particularly suitable for evaluating materials in which higher compressive stresses and lower deformations occur under defined loads and must be measured with precision.

These parameters are important for applications in which foams must absorb and distribute higher compressive forces while exhibiting defined, load-dependent deformation behavior, such as in technical upholstery, seating and support elements, packaging systems, sealing and spacing components, and energy-absorbing parts, including automotive applications.

During testing according to DIN EN ISO 3386-2, standardized foam specimens are conditioned under defined climatic conditions and then placed in a testing machine between two parallel compression plates. The specimen is compressed at a defined rate up to specified deformation levels, while the resulting force is continuously recorded. Due to the material characteristics of higher-density foams, the loading typically occurs at higher stress levels than for softer foam materials.