Patent ID: 6998078
Filing Date: 2006-02-14
Classification: B27N

Abstract:
1. In a process for producing wood fiberboard by pressing binder-treated wood wherein the wood fibers are hydrothermally treated and milled at elevated temperature under steam pressure in a refiner unit, subsequently transferred to a blow-line, then dried and pressed under pressure, optionally at elevated temperature, to produce boards, the improvement comprising: selecting as said binder a multi-component binder, and treating the wood fibers in the refiner with a first component of said multi-component binder, at a temperature of 120° C. to 200° C., said treating taking place prior to the milling step, during the milling step, or shortly after the milling step in the front section of the blow-line, said first component being substantially non-reactive during said treating of said wood fibers, and adding at least a second component of said multi-component binder at a lower temperature of not more than 150° C. at the end of the blow-line or during or after the drying of the wood fibers.