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Oriented strand board (OSB) is a type of engineered wood, formed by adding adhesives and then compressing layers of wood strands (flakes) in specific orientations. It was invented by Armin Elmendorf in California in 1963. [ 1 ]
Plywood is a composite material manufactured from thin layers, or "plies", of wood veneer that have been stacked and glued together. It is an engineered wood from the family of manufactured boards, which include plywood, medium-density fibreboard (MDF), oriented strand board (OSB), and particle board (or chipboard).
The board can be sheet metal, fibre cement, magnesium oxide board (MgO), plywood or oriented strand board (OSB), and the core can either be expanded polystyrene foam (EPS), extruded polystyrene foam (XPS), polyisocyanurate foam, polyurethane foam, or be composite honeycomb (HSC).
Plywood and OSB typically have a density of 560–640 kg/m 3 (35–40 lb/cu ft). For example, 9.5 mm (3 ⁄ 8 in) plywood sheathing or OSB sheathing typically has a surface density of 4.9–5.9 kg/m 2 (1–1.2 lb/sq ft). [51] Many other engineered woods have densities much higher than OSB.
Louisiana-Pacific begins marketing its Oriented Strand Board (OSB) as an exterior siding. 1990: Lawsuits relating to defective OSB exterior siding begin. 1996: Mark Suwyn replaces Merlo as chairman and CEO. 1998: Louisiana-Pacific acquires ABT Building Products as part of its effort to focus on the building products market. 2002
Board is then cooled, trimmed, sanded and maybe veneered or laminated. UF resins are dominantly used in the MDF industry because of their low cost and fast curing characteristics. [ 2 ] However, pressures on the use of UF resins are mounting steadily due to potential problems associated with formaldehyde emission. [ 3 ]