穿著無塵鞋於無塵室地板行走之防滑性與腿部肌肉活動分析

Slip Resistance and Muscular Activity of the Shank in Clean Room Footwear/Floor Environment

鞋與地板間之摩擦係數會影響走路的行為，半導體製造業作業場所使用的地板與人員穿著的無塵鞋與傳統的產業截然不同。在對 85 位半導體現場作業人員的訪談中發現有 34%的受訪者覺得穿著無塵鞋不舒服或很不舒服；有 37%的受訪者覺得走路時有時或經常感覺鞋在地板上的滑動；有 51%的受訪者覺得走路時有時或經常感覺腳與鞋之間產生滑動。對於鞋與地板間摩擦係數的量測，本研究針對了五種鞋材與五種地板，以Brungraber Mark II 測試器進行量測，量測的結果發現長統與短統的無塵鞋之摩擦係數大致在 0.5 之水準，而長統鞋套與拋棄式鞋套之摩擦係數則約為 0.3 之水準。無塵室之鋁合金地板與 Epoxy 地板之摩擦係數介於 0.4 到 0.5 之間。步伐實驗的結果顯示小腿的四個肌群的 EMG （%MVC）受到步頻的顯著影響，而在脛骨前肌、腓腸肌、腓骨長肌 EMG（%MVC）的值在不同的無塵鞋之間也有顯著的差異。然而，不同無塵鞋之EMG（%MVC）之高低卻缺乏一致性。

The coefficient of friction (COF) between shoes and floor affects ones's walking behavior. The footwear and floor materials used in clean rooms in the semiconductor industry are different from other workplaces. In the survey of 85 semiconductor operators, 34% of the subjects felt uncomfortable or very uncomfortable when wearing clean room footwear. Thirty seven percent of the subjects felt that their clean room shoes sometimes or usually slip on the floor. Fifty one percent of the subjects reported that their foot slip on the sole of the clean room footwear when walking. In this research, COF between five clean room footwear and five floor materials were measured by Brungraber Mark II slipmeter. The coefficient of friction (COF) of both of the clean room boots and the shoes measured under various floors were at 0.5 level. The COF of two shoe cases (boot-type and disposable) were about 0.3 level. The COF of aluminum alloy floor and epoxy floor used in clean rooms were between 0.4 and 0.5. The results of gait experiment showed that EMG (%MVC) of the four muscles was significantly affected by walking cadence. The EMG (%MVC) values of anterior tibial muscles, peroneus long muscles, and gastrocnemius muscles were also affected significantly by the type of clean room footwear used. The rank between the footwear was, however, inconsistent among the muscles.