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Physical Tests for Plastics

UL testing can include the determination of a wide variety of material properties including physical characteristics such as the dimensional stability at elevated temperatures, the density or the level of contained water of polymers as well as the scratch resistance of surfaces.

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Dimensional change after water exposure (23°C)

Plastic materials do not always absorb water to the same degree, so that their physical characteristics may change. This can be achieved by immersing the test specimens in water at a defined temperature for a defined period. The number and geometry of the specimens depends on the testing method to be applied.

Standards for Water Exposure
UL 746A, ASTM D1042, ISO 2796

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