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  2. Rolling Friction - Wikipedia

    en.wikipedia.org/wiki/Roll_resistance

    Slip is defined such that a 2% slip means that the circumferential speed of the driving wheel exceeds the speed of the vehicle by 2%. A small percentage slip can result in a slip resistance which is much larger than the basic rolling resistance. For example, for pneumatic tires, a 5% slip can translate into a 200% increase in rolling resistance ...

  3. Rolling (metalworking) - Wikipedia

    en.wikipedia.org/wiki/Rolling_(metalworking)

    The starting material is a thick-walled ring. This workpiece is placed between two rolls, an inner idler roll and a driven roll, which presses the ring from the outside. As the rolling occurs the wall thickness decreases as the diameter increases. The rolls may be shaped to form various cross-sectional shapes.

  4. EPDM rubber - Wikipedia

    en.wikipedia.org/wiki/EPDM_rubber

    Colored EPDM granules are mixed with polyurethane binders and troweled or sprayed onto concrete, asphalt, screenings, interlocking brick, wood, etc., to create a non-slip, soft, porous safety surface for wet-deck areas such as pool decks. [17] It is used as safety surfacing under playground play equipment (designed to help lessen fall injury).

  5. Rubber technology - Wikipedia

    en.wikipedia.org/wiki/Rubber_technology

    Such materials include natural rubber and polybutadiene. The range of materials available is much wider however, since all polymers become elastomeric above their glass transition temperature. However, the elastomeric state is unstable because chains can slip past one another resulting in creep or stress relaxation under static or dynamic load ...

  6. List of soft contact lens materials - Wikipedia

    en.wikipedia.org/wiki/List_of_soft_contact_lens...

    FDA classification of soft contact lens materials [13] FDA lens group Adopted name Transmissibility level (Dk x10-11) Water content Chemical composition I non-ionic low water content: galyfilcon A 60 47% – lotrafilcon A 140 24% DMA, siloxane, TRIS: lotrafilcon B 110 33% polymacon: 7.5 36% HEMA: tetrafilcon 9.0 43.5% HEMA, MMA, NVP: II non ...

  7. Mat - Wikipedia

    en.wikipedia.org/wiki/Mat

    A bath mat is used on the floor of a bathroom to provide a warm non-slip surface, and to absorb small amounts of water, much like a towel. Tapis de Bain design A place mat or serving mat is a flat piece of fabric or other type of material used on a table at the points at which dishes and plates will be located during a meal.

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