Influence on grip of knife handle surface characteristics and wearing protective gloves |
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Authors: | Claudon Laurent |
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Affiliation: | aInstitut National de Recherche et de Sécurité, Avenue de Bourgogne, B.P. 27, F 54500 Vandoeuvre, France |
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Abstract: | Ten subjects were asked to apply maximum torques on knife handles with either their bare hand or their hand wearing a Kevlar fibre protective glove. Four knife handles (2 roughnesses, 2 hardnesses) were tested. Surface electromyograms of 6 upper limb and shoulder muscles were recorded and subject opinions on both knife handle hardness and friction in the hand were also assessed. The results revealed the significant influence of wearing gloves (p<0.0001), knife type (p<0.0005) and handle hardness (p<0.005) on the applied torque. Wearing Kevlar fibre gloves greatly increased the torque independently of the other two parameters. Under the bare hand condition, a 90° ShA slightly rough handle provided the greatest torque. Subject opinion agreed with the observed effects on recorded torque values except for the hardness factor, for which a preference for the 70° ShA value over the 90° ShA value emerged. |
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Keywords: | Grip Knife handle Protective glove |
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