The plywood is cut from steamed softened logs into large sheets, and then the wood fibers are placed perpendicular to each other, bonded with a synthetic resin glue with good water resistance, and then pressed, dried, sawed, and finished. Plate. The number of layers is odd, generally 3-13 layers, which are called plywood and plywood. The species used to make plywood are eucalyptus, birch, ash, eucalyptus, color wood, and willow wood. The fiberboard is a plate made by crushing, immersing, grinding, and grinding the waste materials such as bark, shavings, and branches into a wood pulp, followed by pressure molding and drying. Due to the different temperature and pressure during molding, it can be divided into three types: hard, semi-rigid and soft. Particleboard is a sheet of pressed wood shavings or wood fiber with or without a compound applied. Particleboard has low density and uniform material, but it is easy to absorb moisture and has low strength. The blockboard utilizes the corner scraps generated during the wood processing process, and is an artificial board formed by shaping, planing, splicing and veneering. The core of the core is generally a short dry wood strip with a single layer of thin wood or plywood. Blockboard is not only an effective measure for comprehensive utilization of wood, but also obtains a uniform structure, stable size, large format and large thickness. In addition to surface decoration, it can also be used as a construction material. Other explanations and emerging processes for the production of wood-based panels: Raw materials for wood-based panels, except for logs that require logs, mostly from harvesting and processing residues, and small-diameter materials ( less than 8 cm in diameter ). Sheet, strip, needle, and granular materials that have been crushed or shaved and then shredded can be used for particleboard manufacturing. The chips are separated by fibers and used in the manufacture of fiberboard. This will increase the wood utilization rate by 20 to 25% compared to conventional use . In the 1970s , attention was paid to the use of bark and wood chips as raw materials for wood-based panels, but the bark could only be used in the middle layer of particleboard. The amount should not exceed 8% , otherwise the strength of the product would be reduced. In addition, non-wood materials have also received increasing attention. In addition to bagasse, hemp stalks, etc., which have long been used in the production of wood-based panels, they have been expanded to a variety of plant stems and seed shells. Tags: bamboo sheet, blockboard , eco board , particle board, sheet brand , wood
Stainless Steel Dish Rack,Steel Dish Rack,Stainless Dish Rack,Stainless Steel Dish Drainer Jiangmen Jianghai Jianshang Houseware Co.,LTD. , https://www.jm-jianshang.com
Analysis of production process of various types of wood-based panels