This technical information paper explains how to measure and control the coefficient of static friction, expressed as slide angle, between corrugated board, solid fiberboard, linerboard, and paper surfaces. It covers sampling strategies for incoming materials and corrugator operations, X-bar and R control charts, X and moving-range charts, control-limit calculations, corrective actions, and the relationship between slide angle and friction coefficient. The guidance supports process monitoring, frictionizing application control, supplier evaluation, and compliance with customer specifications.
Application Scope: Intended for corrugated packaging manufacturers, linerboard suppliers, quality-control laboratories, process engineers, and technical professionals managing board friction and material-handling performance.
