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Coating wrinkling and its causes

2026-02-09View Original

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The paint film exhibits wrinkles in the form of regularly spaced, small-amplitude ripples, which can extend to part or the entire thickness of the film. Coating wrinkling is a common coating defect; its root cause is the uneven drying rates of the surface layer and the underlying layers, which prevents the internal contraction stresses from being released by the surface layer, thus resulting in irregular wrinkles. This phenomenon is usually caused by the combined effect of multiple factors.

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