Oriented strand board
Among the new types of particleboard, one variety stands out due to its unique manufacturing process. When the shavings are formed, they are arranged longitudinally along the direction of the fibers during the production of the mixed particleboards. This arrangement allows for greater pressure to be applied during the pressing stage, resulting in a particleboard that is stronger and more durable compared to conventional ones. The dimensions of this type of particleboard are typically larger in length and width, with a slightly thicker profile than standard particleboard. There are two primary methods for achieving this orientation: mechanical alignment and electrostatic alignment. Mechanical alignment works best for large-scale, directional laying, while electrostatic alignment is ideal for precise, fine shaving applications. The surface of the oriented strand board is covered with finer materials like sawdust and small chips, while the core is filled with structured shavings laid in an oriented manner. This board features a five-layer structure: two outer layers made of fine materials, two intermediate layers with longitudinally oriented shavings, and a central layer of horizontally aligned shavings. The entire slab can be assembled and dried on a continuous multi-head molding machine. It serves as an excellent load-bearing component for furniture panels, such as side boards or shelves. Due to its high strength in specific directions, oriented strand boards can be stacked in alternating vertical layers—similar to plywood—to create three- or five-layer panels. These boards exhibit properties comparable to those of plywood but are often used as a cost-effective alternative for structural purposes. As a novel structural board, it holds great promise in optimizing the use of smaller diameter logs, fast-growing timber, and enhancing overall wood efficiency.
In terms of drying technology, the oriented shaving particleboard dryer can utilize either single-channel or three-channel rotary drying equipment. Fuel sources include biomass, coal, and fuel oil, offering flexibility depending on availability and environmental considerations. These advancements in production not only improve the quality of the final product but also contribute to sustainability by utilizing renewable resources effectively.
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