Patent ID: 6235403
Filing Date: 2001-05-22
Classification: B27K,Y10T

Abstract:
A process for treating wood with waterborne preservative, comprising the following steps:introducing wood to be treated into a treatment vessel;pretreating said wood by application of at least one of (a) an initial vacuum, and (b) a pressure not exceeding 150 kPa;immersing said wood in said treatment vessel in a waterborne preservative preheated to a temperature of about 40.degree. C. to about 90.degree. C., at elevated pressure and at elevated temperature ranging from at least 40.degree. C. to less than 100.degree. C. so as to impregnate said wood with said preservative and to facilitate fixation of said preservative in said wood in a single step;separating impregnated said wood and any excess waterborne preservative while said treatment vessel is pressurized; andreducing pressure in said treatment vessel.