OSB board is a type of synthetic wood.

It is a type of synthetic wood. The origin of "OSB" - the scientific name for "Oriented Strand Board" (OSB) is a type of new board that originated from Europe and rapidly developed internationally in the 1970s and 1980s. OSB has achieved unprecedented development in furniture applications, with many large furniture enterprises beginning to use "OSB" to manufacture furniture. The reason why it is so popular among consumers is that the formaldehyde emission is almost zero [3], and it is also strong and durable, and lighter in weight than furniture made from medium-density fiberboard. The OSB board is made from small-diameter wood, selective cutting wood, and wood cores, processed by special equipment into long strips (generally 40-100mm long, 5-20mm wide, and 0.3-0.7mm thick), through processes such as degreasing, drying, gluing, directional laying, and hot pressing to form a directional structure board.

The surface strips of the OSB board are arranged longitudinally, while the core strips are arranged laterally. This interlaced arrangement reorganizes the wood texture structure, completely eliminating the influence of internal stress on processing, making it have extraordinary machinability and moisture resistance. Due to the directional structure inside the OSB, there are no joints, no gaps, no cracks, and the overall uniformity is good. The internal bonding strength is extremely high, so both the center and the edges have super-strong nail-holding ability that cannot be matched by ordinary boards.

"OSB" has good stability and high screw-holding force. The raw materials of "OSB" mainly include soft needles, small-diameter wood of broad-leaved trees, fast-growing selective cutting wood, such as eucalyptus, fir, and poplar selective cutting wood, etc., with a wide range of sources, and can be manufactured into large panels (such as 8×32 feet or 12×24 feet). Its manufacturing process mainly involves drying, gluing, directional laying, and hot pressing of certain geometric shapes of strips (usually 50-80mm long, 5-20mm wide, and 0.45-0.6mm thick). The technical difficulty is high, and the equipment investment is relatively large, mainly imported equipment, with investments ranging from several hundred million to several billion yuan. China's "OSB" manufacturing technology and equipment production capacity are far behind North America and Europe, and the main "OSB" in the market mainly relies on imports.

Compared with plywood, medium-density fiberboard, and fine woodwork board, "OSB" has a smaller linear expansion coefficient, good stability, uniform material, and higher screw-holding force. Because the wood chips are arranged in a certain direction, its longitudinal bending strength is much greater than the transverse one, so it can be used as structural material and as load-bearing components. In addition, it can be processed like wood, such as sawing, sanding, planing, drilling, nailing, filing, etc., and is a good material for architectural structures, interior decoration, and furniture manufacturing. The disadvantage is that the thickness stability is poor, mainly due to the unequal size of the wood chips, the direction and angle of the wood chips during the laying process cannot be guaranteed to be completely horizontal and uniform, which will form a certain density gradient and have an impact on the thickness stability.

"OSB" has a broad application space and development potential. What the market values is the low formaldehyde emission, and it can be used for: flooring, walls and roofs, I-beams, structural isolation boards, packaging boxes, goods pallets and storage boxes, commodity shelves, industrial desktops, broad-leaved wood floor cores, air-venting boards and guardrails, decorative wall panels, prefabricated concrete forming, container floors, bowling alley lanes, etc. After processing, it replaces fine woodwork boards, three-part boards, five-part boards, construction templates, fireproof boards, decorative boards, and medium-density fiberboard. The backing board between the solid wood floor and the keel, or the base material for composite wood flooring. The structural board of furniture and kitchenware. Building construction use retaining boards, ditch templates, pad boards, etc. After applying a single-sided coating to the "OSB" surface, it can be used for plain boards in furniture manufacturing, drawer bottoms, boxes, containers, cabinet partitions, floorboards, bedboards, etc.