Artificial boards are made of wood and its residues or other non-wood plants as raw materials. After being separated into various unit materials through certain mechanical processing, they are glued together with or without adhesives and other additives. The emergence of artificial boards has revolutionized the way residents use forest resources, upgrading from simply changing the shape to changing the properties of wood, and improving the comprehensive utilization rate of wood. According to different raw materials and production processes, artificial boards can be divided into fiberboards, plywood, particleboards, European pine boards, zero formaldehyde environmentally friendly boards, straw artificial boards, blockboards, core boards, density boards, melamine boards, particleboards, wood fiber boards, sound-absorbing boards, decorative panels, fireproof (water) boards, veneers, finger-jointed panels, artificial veneer panels, non-wood artificial boards, wood-plastic boards, building formworks, etc. Among them, fiberboards, plywood, and particleboards are the three mainstream artificial boards in the market.
Plywood:
Plywood is made by steaming and softening logs, peeling them into large sheets, placing the wood fibers perpendicular to each other, bonding them with water-resistant synthetic resin glue, and then pressing, drying, sawing, and surface trimming. The number of layers is an odd number, generally 3-13 layers, and they are called three-ply board, five-ply board, etc. The tree species used to make plywood include basswood, birch, ash, beech, monocot, eucalyptus, etc.
Fiberboard:
Fiberboard is a board made by crushing, soaking, grinding and pulping bark, wood shavings, branches and other waste materials, and then pressurizing, molding and drying. Due to the different temperatures and pressures during molding, it can be divided into three types: hard, semi-hard and soft.
Particleboard：
Particleboard is a board made of wood shavings or wood fiber materials with or without glue. Particleboard has low density and uniform material, but it is easy to absorb moisture and has low strength. Others about the production of artificial boards: The raw materials used for artificial boards, except for logs required for plywood, mostly come from logging and processing residues, as well as small-diameter wood (less than 8 cm in diameter). Flakes, strips, needles, and granular materials made by crushing or chipping and then crushing can be used for particleboard manufacturing. Wood chips are used for fiberboard manufacturing after fiber separation. This can increase the utilization rate of wood by 20-25% compared with traditional utilization methods. In the 1970s, attention was paid to the use of bark and sawdust as raw materials for artificial boards, but bark can only be used in the middle layer of particleboards, and the amount cannot exceed 8%, otherwise it will reduce the strength of the product. In addition, non-wood materials are also increasingly valued. In addition to bagasse, hemp stalks, wheat straw, etc., which have long been used in the production of artificial boards, they have been expanded to a variety of plant stems and seed shells.
