Slippery Surfaces

You should always anticipate hazards such as sharp objects like nails, broken glass, and medical needles slippery surfaces steep grades and potentially unstable surfaces such as walls, floors, or roofs that could cause falls, give way, or collapse. Other common physical hazards include ... 

You are probably most familiar with Teflon as a nonstick coating for kitchen utensils (Figure 23.2). The slippery surface of Teflon-coated fry pans and muffin tins results from Teflon s extremely low coefficient of friction. 

A different type of low friction or low drag application is encountered with sliding doors or conveyor belts sliding on support surfaces. In applications like this the normal forces are generally quite small and the friction load problems are of the sticking variety. Some plastics exhibit excellent track surfaces for this type of application. TFEs have the lowest coefficient of any solid material and represent one of the most slippery surfaces known. The major problem with TFE is that its abrasion resistance is low so that most of the applications utilize filled compositions with ceramic filler materials to improve the abrasion resistance. 

Debris, holes, loose steps or flooring, protruding objects, slippery surfaces, or unsecured railings, which can cause falls, slips, and trips... 

Unsecured objects, such as bricks and gas cylinders, near the edges of elevated surfaces, such as catwalks, roof tops, and scaffolding, which may dislodge and fall on workers Debris and weeds that obstruct visibility Install skid-resistant strips and other antiskid devices on slippery surfaces Construct operation pads for mobile facilities and temporary structures Construct loading docks, processing and staging areas, and decontamination pads... 

J. M. Piau, N. El Kissi, F. Toussaint, and A. Mezghani, Distortions of Polymer Melt Extrudates and their Elimination Using Slippery Surfaces, Rheol. Acta, 34, 40 (1995). 

Polymer which has been flowing along a slippery surface appears smooth and transparent, whether the same polymer appears to be cracked after flowing along a classic surface at the same flow regime. 

Piau J.M., El Kissi N., F. Toussaint and A. Mezghani, "Distortions of polymer melts extrudates and their elimination using slippery surfaces," Rheologica Acta, 34 (1995) 40-57. 

The chemical release into a confined space is life threatening. High-pressure liquid, falling objects, and slippery surfaces in a confined space are all potential hazards. The limited space, inadequate ventilation and light, and excessive noise are also physical hazards that increase the confined space hazards. The chemical waste and useful chemicals are also life threatening. 

Surface treatments help eliminate or reduce the risk of such problems without altering the device s essential material properties. For example, hydromer coatings are covalently bonded to the device. When wet, the hydromer creates a slippery surface, reducing trauma, and improving ease of insertion. 

In the limited slip differential, clutches apply friction to the shaft of the spinning road wheel. This diverts rotational power to the opposite shaft, allowing the vehicle to gain traction and move off on the slippery surface. 

Fluoropolymers can create a slippery surface if they are mbbed against a hard surfaee because they... 

Slip is not a sizing problem, as such, but is caused by the use of excess AKD and subsequent hydrolysis of this excess material. The hydrolysis product of AKD, the so called stearone, has a higher melting point and is a more slippery material. The hydrolysis of AKD also tends to occur on the surface of paper, rather than internally, which means there is always an excess of stearone at the surface. This means that there can be slippery surfaces in contact causing this problem. It should be stressed that this only occurs with excess AKD. In general levels of AKD below 1.5 kg/t in fine paper, 2.0 kg/t in recycled paper and 3 kg/t in waste-based board should not give this problem. It can be reduced, or eliminated by ... 

A container is considered less than optimal if it has a frontal length > 16 in (40 cm), height > 12 in (30 cm), rough or slippery surfaces, sharp edges, asymmetric center of mass, unstable contents, or requires the use of gloves. A loose object is considered bulky if the load cannot easily be balanced between the hand grasps. 

Biocompatible (with no injurious or toxic effects, and inherently less thrombogenic and fibrotic because the slippery surface reduces platelet adhesion)... 

Unsafe work spaces—slippery surfaces, disorderliness, falling objects and tools, narrow work places and transport paths. 

Horseback A mass of material with a slippery surface in the roof shaped like a horse s back. 

Loss of surface skid resistance is a skid hazard associated with smooth and slippery surface, which directly affects traffic safety. Unlike all other surface distresses, a smooth and slippery surface does not affect the structural deterioration of the pavement. 

Slippery surface may result from polishing and abrasion of the surface aggregate or asphalt bleeding. Both factors reduce the macro- and micro-texture of the pavement surface and the surface skid resistance provided. 

Slippery surfaces are dangerous and should be treated immediately. Seaweed, sea-slime and bird droppings should be cleaned off. Oily or greasy surfaces should be gritted. Icy or frosty surfaces should be treated with industrial salt or sand. 

Drip trays should be sand-filled and set beneath all machinery to prevent the development of oily, slippery surfaces and, especially on pontoons, to minimise fire hazards. 

Does the driver know how to judge safe speed on slippery surfaces ... 

Have drivers ever been trained to safely maneuver on slippery surfaces How When By whom ... 

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