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Until the mid-1990s, foam concrete was regarded as weak and non-durable with high shrinkage characteristics. [1] This is due to the unstable foam bubbles resulted in foam concrete having properties unsuitable for producing very low density (Less than 300 kg/m 3 dry density) as well as load bearing structural applications. It is therefore ...
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 ...
Integral skin foam, also known as self-skin foam, is a type of foam with a high-density skin and a low-density core. It can be formed in an open-mold process or a closed-mold process. In the open-mold process, two reactive components are mixed and poured into an open mold.
HDPE is known for its high strength-to-density ratio. [4] The density of HDPE ranges from 930 to 970 kg/m 3. [5] Although the density of HDPE is only marginally higher than that of low-density polyethylene, HDPE has little branching, giving it stronger intermolecular forces and tensile strength (38 MPa versus 21 MPa) than LDPE. [6]
Urea foam [6] 2.54: 1 0.92: 5.25: 36.4 Extruded expanded polystyrene (XPS) high-density 2.54: 1 0.88–0.95: 5–5.4: 26–40 [3] Polystyrene board [6] 2.54: 1 0.88: 5.00: 35 Phenolic rigid panel 2.54: 1 0.70–0.88: 4–5: 28–35 Urea-formaldehyde foam 2.54: 1 0.70–0.81: 4–4.6: 28–32 High-density fiberglass batts 2.54: 1 0.63–0.88: 3. ...
An assortment of polyurethane foam products for cushioning and insulation. Polyurethane foam is a solid polymeric foam based on polyurethane chemistry. As a specialist synthetic material with highly diverse applications, polyurethane foams are primarily used for thermal insulation and as a cushioning material in mattresses, upholstered furniture or as seating in vehicles.