Surface test of motor vehicle interior materials - Scratch and abrasion resistance
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Our test laboratory performs testing in accordance with the BMW standard GS 97034-10 under accredited procedures. This Group Standard describes the quantitative determination of scratch and abrasion resistance of high-gloss decorative surfaces in vehicle interiors. The resistance of a material to superficial mechanical stresses such as rubbing, scuffing, wiping, scratching, or polishing is evaluated. The method is suitable for high-gloss plastics, films, paints, coatings, and wood decorative surfaces. It is not applicable to body paints, glass-like functional layers (e.g., hardcoats), or very soft surfaces such as TPE or elastomers.
Testing is carried out on flat specimens. Using a linear stroke device (BMW/Erichsen scratch tester), a friction pin is guided over a defined distance across the surface. Three test tracks are produced, each consisting of five double strokes. The initial surface condition is recorded by means of a gloss measurement. Twenty-four hours after introducing the abrasion track, gloss is measured again to determine the relative change in gloss.