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The static coefficient of friction (μs) of polishes, measured by the James machine and ASTM D2047, provides a measure of the inherent slip resistance of the polish film. When in use, polish films are invariably modified by traffic and routine maintenance procedures that could, theoretically, change the inherent slip resistance of the film. Portable tribometers are not appropriate for measuring μs of polishes in traffic because they have not yet demonstrated a correlation with the James machine, so they provide no criterion for determining whether the surface is slip resistant.
A protocol was developed using the James machine and a modification of ASTM D2047 to measure μs of polish films after pedestrian traffic and routine maintenance had been performed. The maintenance procedures included high speed burnishing, high speed spray buffing, low speed spray buffing, damp mopping, autoscrubbing, deep cleaning (partial stripping), dust mopping, and dry sweeping.
The protocol was extended to test the effect of traffic and maintenance on μs. This paper also reports the μs changes observed with three compositionally different but commercially typical floor finishes and two widely used commercial polishes of unknown composition.
Floor polish, static coefficient of friction, dynamic coefficient of friction, James machine, portable tribometers, slip resistance, damp mopping, mop scrubbing, machine scrubbing, auto-scrubbing, low speed spray buffing, high speed spray buffing, high speed burnishing
President, J. M. Owens, Inc., North Wales, PA