Förfarande för att binda modifieringskemikalier vid massiva träprodukter och för att förhindra sprickbildning i dessa

摘要

The invention concerns a method for binding modification chemicals to massive wood products. According to the invention, the wood products are first treated with the modification chemicals, such as aqueous solutions of maleic acid or maleic anhydride, and then the wood products are redried at a temperature of less than 100 DEG C until their humidity has decreased below 20 %. Finally, the wood products which thus have been treated with modification chemicals and predried are subjected to a heat treatment carried out at a temperature of more than 100 DEG C in order to bind the modification chemicals to the wood. The heat treatment can be carried out in a heat press. The invention makes it possible to avoid internal cracks in wood products which are big enough for practical purposes such as for use in various pieces of furniture.