A METHOD FOR IMPREGNATION OF WOOD AND WOOD BASED PRODUCTS

摘要

The invention relates to a method of impregnating wood or wood based products with a preservative or other wood modifying chemical under pressure. A composition comprising said chemical is impregnated into the wood under hydraulic pressure and the hydraulic pressure is controlled to control the amount of chemical impregnated into the wood. The hydraulic pressure is replaced with sufficient pneumatic pressure to hold the impregnated composition in the wood while the unused composition is removed from the treatment vessel. The pneumatic pressure remains applied to force the chemical further into the wood.