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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 ...
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.
Sorbothane was invented and patented in 1982 by Dr. Maurice Hiles, [1] a British inventor. It was prepared by mixing polyol and isocyanate. [2] His research into the energy dissipation properties of human soft tissue disclosed a structure very similar to an interpenetrating polymer network.
It provides an interface between two parts, damping the energy transmitted through the bushing. A common application is in vehicle suspension systems, where a bushing made of rubber (or, more often, synthetic rubber or polyurethane [1]) separates the faces of two metal objects while allowing a certain amount of movement. This movement allows ...
In some modern cars, flexibility is mainly in rubber bushings, which are subject to decay over time. For high-stress suspensions, such as off-road vehicles, polyurethane bushings are available, which offer more longevity under greater stresses. However, due to weight and cost considerations, structures are not made more rigid than necessary.
Manufacturer Marque Model State Facility Percentage of model's contents made in the U.S. or Canada (2024) [1] BMW Group [2] BMW: X3: South Carolina: BMW US Manufacturing Company: 23% X4: 32% X5: 28% X6: 30% X7: 25% XM: 21% Faraday Future: Faraday Future FF 91: California: FF ieFactory California: N/A Ford Motor Company [3] Ford: Bronco ...