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How to Achieve Bottom High Friction

The frictional properties of the motion deck are particularly important and must be considered in detail given that the user of the device can easily fall if it slips away. While the top plate might have moderate top surface friction to ensure comfort, the bottom plate must have high friction for safety purposes. The motion deck could be anchored into position using ties, which could serve to maintain its position throughout the sitting duration. However, installing them may prove difficult and time-consuming.

To increase friction between the deck’s bottom plate and the surface below, high-density polyethylene (HDPE) material will be used. This material has a high coefficient of friction, a measure that is used to express its sliding resistance over another material.  According to Peacock (2000), the main factors that influence its coefficient of friction are molecular characteristics. When designing the bottom plate focus will be given to the HDPE crystallinity, particularly its average molecular weight and branching level.

Polyethylene that has been subjected to a series of molds until it forms granules will be used. This molding process will yield a stronger polymer material with little branching but greater tensile strength and intermolecular forces. This design will make it possible for the bottom plate to mate with the fulcrum of the motion deck using steel screws, allowing the device to meet the spinning functionality requirements. More importantly, the design of the bottom plates using HDPE will provide high friction and structural integrity that will give the device stability.

The use of HDPE is recommended given that this material suits the injection molding process especially where continuous or batch production is involved. Consequently, creating the remaining 5 to 10 prototypes will be easy. Additionally, the material is ideal for this purpose given that it is resistant to scratching, dent, microbes, and corrosion while at the same time providing a stronger surface and high friction surface.How to Achieve Bottom High Friction




Peacock, A. (2000). Handbook of polyethylene: structures: properties, and applications. CRC Press.