The raw materials for making particleboard include wood or lignocellulosic materials, adhesives and additives. The former accounts for more than 90% of the dry weight of the board . Wood raw materials are mostly taken from forest cuttings, small diameter materials ( usually less than 8 cm in diameter ) , harvesting residues and wood processing residues. It is processed into flakes, strips, needles, and granules, wood chips, wood chips, sawdust, etc., and is called scrap. In addition , non-wood materials such as plant stems and seed shells can also be made into sheets , which are often named after the materials used, such as hemp ( planing ) boards, bagasse (shavings) boards, and the like. Urea-formaldehyde resin glue and phenolic resin glue are used for the adhesive. The former has a light lip color and a low curing temperature , and has good gluing effect on various plant materials such as wheat straw, rice husk and the like, and the hot pressing temperature is 195 to 210 °C. It is widely used in production, but it has the disadvantage of releasing free formaldehyde to pollute the environment.
Tags: ecological board, sheet, wood, particle board
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