Stabilization of shapes and dimensions of compressed wood using chemical and physical methods

Descriptions of methods and results experiments on the preservation geometry dimensional parameters compressed wood using chemical physical are given. Wide ranges substances were used as stabilizers in urea aqueous solution (plasticizer during pressing). Wood treatment with ultrasound, liquid nitrogen pulsed magnetic field was methods. Urotropine, urea-formaldehyde oligomer, phenol-formaldehyde resin, butyric anhydride (liquid field), well ultrasound can be applied to increase form stability pressed level swelling water absorption natural (respectively, 15-20% 30-45%). Cashew nut shell is recommended obtain stable wood. The liquid, a content 6-12% (by dry residue) relative mass heat temperature range 150-155°C for 8 hours, gives limiting volume 7-8% 14-18%. Fully obtained after exhaustive acetylation acetic subsequent maximum impregnation phenol alcohols (more than 70% content) thermocatalytic curing. However, this method cannot due high toxicity material weakness.