Patent ID: 6537616
Filing Date: 2003-03-25
Classification: D21H

Abstract:
A process of using indigenous steam to achieve simultaneous impregnation and drying of lignocellulosic material, comprising the steps of:a) treating a lignocellulosic material with an additive by applying said additive onto a top surface of said material, said treated lignocellulosic material containing moisture; b) placing said treated lignocellulosic material into a heated press with said top surface proximate a top press platen and an opposite bottom surface proximate a bottom press platen providing venting means; c) applying heat and pressure from said heated press with said top press platen at a higher temperature than said bottom press platen to impregnate said additive from said top surface toward said bottom surface of said material and to dry said material, said pressure being in the range of about 0.5 bars to about 69 bars; and d) removing said treated lignocellulosic material from said heated press.