Abstract: The invention is a composition of matter and method for its use in reducing formaldehyde emission from wood composite panels bonded with aminoplast resins. The preferred composition comprises urea, a carbohydrate based material such as cooked or gelatinized starch, and an acidic catalyst for the resin. The ratio of urea to carbohydrate based material is in the range of 10:1 to 40:1 while the urea forms from 20-60% of the composition. In use, the composition is preferably sprayed on the wood particles, flakes or fiber in the blender at the same time resin is added. Typical usage is 0.4-3 parts, on a urea basis, added to each 100 parts of dry wood substance. Depending on several factors, the reduction in formaldehyde emission ranges from 60-90% without serious deterioration occurring in any other product physical properties.

Abstract: Alined wood particles and an adhesive binder comprise the faces of a sandwiched, laminate-like structure formed in a one-step pressing and heating operation, the interior of which is made of randomly oriented wood particles and an adhesive binder, exhibiting light weight and greater bending strength than known particleboards constructed from heavy hardwoods such as red oak.

Abstract: A wood-base building component of cellulosic particles and/or fibers and adhesive binder is, in a single pressing operation, molded into an integral product of sheathing and support members for use in constructing wood-frame buildings. The dies utilized during press-molding form a flat panel containing a plurality of evenly spaced channels that serve as support members to replace conventional framing such as studs, joists, and rafters. The integral product may serve as roof, wall, or flooring components in the usual wood-frame building applications.