Virginia Tech® home

Coefficient of Friction Testing

Friction testing, also called a coefficient-of-friction (COF) testing, takes any sheet-like substrate (paper, corrugated, plastic film, paperboard, etc…) and determines the angle of inclination at which one sheet will begin to slide/slip against the surface of another sheet (of a similar material).

Packages are most often bundled together, which means they will be stacked atop and alongside each other. So this testing determines the rate at which the packaging materials will slide against each other – possibly causing movement and slippage within the unit load or damaging the packaging materials.


Equipment used for CoF Testing:

Coefficient of Friction
Tester: Model 32-25

by Testing Machines, Inc.

Testing Angle: 0-80 degrees
Measures: slide angle, coefficient of static friction
Motor: electric