Published: Jan 1990
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Measurement of dynamic friction at a sliding speed of approximately 10 cm/s has been found to correlate more closely with slip resistance, as assessed in wear tests, than measurement of either static friction or high speed dynamic friction (1.5 m/s) or both. A new friction test for footwear and floorings is described which measures dynamic friction at 10 cm/s under conditions simulating those in walking when slip occurs.
Three areas of application of the test are discussed: (a) Development of standards for slip-resistance testing: the SATRA Friction Test conforms to a proposed ISO Safety Footwear test method recently drafted; (b) Development of sole tread pattern design guideline; good shoe sole design is important in achieving slip resistance on lubricated or contaminated surfaces. The effective characteristics of tread pattern design have been investigated and the findings are summarized in a set of sole design guidelines. (c) Product development: progress in developing new heel top-piece materials for women's shoes having improved slip-resistance is reported.
footwear, friction, floors, wear tests, test methods, safety engineering
Principal officer, SATRA Footwear Technology Centre, Kettering, Northants