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In the UK (and other parts of the EU), 'insulated' roller garage doors are available, using an aluminum lathe filled with polyurethane foam for thermal and acoustic insulation. Concerning thermal insulation, the roller door has a typical insulation R-value of 4.9 to 5.2. A sheet steel garage door has a typical insulation R-value of 0.5 to 2.7.
A suitable resin for combining the fiberglass with a plastic to produce a composite material was developed in 1936 by DuPont. The first ancestor of modern polyester resins is Cyanamid's resin of 1942. Peroxide curing systems were used by then. [6] With the combination of fiberglass and resin the gas content of the material was replaced by plastic.
An early example of plastic bicycle wheels, using fibreglass reinforced Zytel, were Skyway "Tuff Wheels" for BMX bicycles. In this role, any weight penalty was adequately compensated by durability and impact resistance. Former American 200m and 400m sprinter Michael Johnson used shoes made of Zytel at the Atlanta Olympics.
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Fibre-reinforced plastic (FRP; also called fibre-reinforced polymer, or in American English fiber) is a composite material made of a polymer matrix reinforced with fibres. The fibres are usually glass (in fibreglass ), carbon (in carbon-fibre-reinforced polymer ), aramid , or basalt .
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