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  2. Polyurethane - Wikipedia

    en.wikipedia.org/wiki/Polyurethane

    Polyurethane synthesis, wherein the urethane groups −NH−(C=O)−O− link the molecular units A kitchen sponge made of polyurethane foam . Polyurethane (/ ˌ p ɒ l i ˈ jʊər ə ˌ θ eɪ n,-j ʊəˈr ɛ θ eɪ n /; [1] often abbreviated PUR and PU) refers to a class of polymers composed of organic units joined by carbamate (urethane) links.

  3. Razor (scooter) - Wikipedia

    en.wikipedia.org/wiki/Razor_(scooter)

    The basic scooter design consists of an airplane grade aluminum frame, [4] 98 mm polyurethane wheels, and a hinged fender over the rear wheel, which is pushed down by the foot to act as a spoon brake. The handlebar and headtube fold for carriage when a quick release latch is opened.

  4. Xootr - Wikipedia

    en.wikipedia.org/wiki/Xootr

    Xootr scooters are characterized by 180mm wheels with aluminum hubs, and a hand brake for the front wheel (for the rear on old models). One defining feature of Xootr scooters is the relatively large wheels they are equipped with, as well as the hinge system, which uses a pin. Xootr scooters were originally introduced in 1999 by Nova Cruz ...

  5. Frank Nasworthy - Wikipedia

    en.wikipedia.org/wiki/Frank_Nasworthy

    Having realized the potential of a polyurethane skateboard wheel, Nasworthy invested $500, which he had accumulated working in a restaurant, and formed the Cadillac Wheels Company (on account of their smooth ride). [2] Creative Urethane made the wheels to his specifications and Nasworthy took his company to California in 1972.

  6. The Fad Toy Everyone Was Obsessed With the Year You Were Born

    www.aol.com/fad-toy-everyone-obsessed-were...

    2000: Razor scooter Razor reintroduced kids to the classic scooters of yesteryear with sleek aluminum and a patented brake design. All other modes of transportation immediately were deemed irrelevant.

  7. Skateboard - Wikipedia

    en.wikipedia.org/wiki/Skateboard

    The wheels are typically made of polyurethane (PU) and come in different grades of PU. Higher-grade PU is more durable and provides a smoother ride, while lower-grade PU is more affordable but wears out faster. [14] Larger wheels are heavier in weight, which are better for maintaining speed and longer distances.

  8. Centreless wheel - Wikipedia

    en.wikipedia.org/wiki/Centreless_wheel

    The Skatecycle is a device similar to a caster board, but with hubless wheels and a 2-axis twisting axle replacing the function of the casters. The central axle connects two standing platforms surrounded by 9" polyurethane hubless wheels, giving said wheels the appearance of stirrups. In order to move the unit, the rider rotates their feet ...

  9. List of polyurethane applications - Wikipedia

    en.wikipedia.org/wiki/List_of_polyurethane...

    Industrial Insulation. Rigid polyurethane foam is used in various industries to provide thermal insulation to installations and pipes. In particular, the piping for district heating systems in Europe is primarily insulated using a pre-insulated pipes sandwich assembly composed of a steel heat service pipe, an insulating layer (polyurethane foam) and a polyethylene (PE) casing, which are bonded ...

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