Provided is a strand board with improved strength and water resistance. Reduction in productivity is prevented and characteristics of the strand board can be varied as desired while achieving certain strength and water resistance of the strand board. A strand board B is formed by stacking and laminating five strand layers 1 each formed by a large number of strands 5. The strand board B has substantially constant density distribution in the lamination direction of the strand layers 1. Three of the five strand layers 1 of the strand board B are high-density strand layers 1a having a higher density than the other strand layers 1, and the other strand layers 1 are low-density strand layers 1b.

The general inventive concepts relate to engineered wood products. The engineered wood products demonstrate improved properties including acoustic damping, fire resistance, and water absorption relative to similar engineered wood products that comprise only a single source of fibers. In contrast, the inventive engineered wood products include a combination of at least two types of fibers.

A defibrated material manufacturing device is configured to defibrate a feedstock of clumps of shreds containing fiber into defibrated material. The defibrated material manufacturing device has a removal device, a metering device, storage device, and a defibrator. The removal device is configured to remove at least a part of foreign matter contained in the feedstock. The metering device is configured to measure the feedstock that has passed the removal device. The storage device is configured to store a measured feedstock measured by the metering device. The defibrator is configured to defibrate the measured feedstock supplied from the storage device into the defibrated material.

A composite wood panel is manufactured from thin wood laminae cut from wood unsuitable for peeler logs or dimensional lumber. A cold set adhesive is applied to the wood laminae and they are formed into a randomly oriented mat that is cold rolled into a thin, pliable cold rolled stock that can be corrugated. A hot set adhesive may also be applied to the laminae to improve strength of the composite wood panel. The hot set adhesive is set in a hot press after the cold rolled stock is produced.

The present invention provides bonding systems comprising a formaldehyde-based (urea-/melamine-/phenol-/resorcinol-formaldehyde or other combination) and/or a polymeric isocyanate resin system composition for bonding ligno-cellulosic materials to form panels and/or shaped products, which contain a resin hardener, also referred to as resin catalyst, characterised in that the hardener is activated by heat.

In a stack of composite wood boards, the wood boards comprise wood particles and an organic binder.

A decorative panel including a substrate material and decorative top layer, wherein the decorative top layer includes at least one timber layer, wherein the timber layer is a compressed timber layer with a permanent increased density as compared to an original timber layer, wherein the decorative panel is a square or rectangular floor panel which, at, at least one pair of opposite edges, or at both pairs, includes mechanical coupling allowing to couple two of such floor panels to each other such that a locking is created in a vertical direction perpendicular to a plane of the coupled panels, as well as in a horizontal direction perpendicular to a coupled edge and in the plane of the coupled panels, the mechanical coupling being in the substrate material.

A decorative panel including a substrate material and decorative top layer, wherein the decorative top layer includes at least one timber layer, wherein the timber layer is a compressed timber layer with a permanent increased density as compared to an original timber layer, wherein the decorative panel is a square or rectangular floor panel which, at, at least one pair of opposite edges, or at both pairs, includes mechanical coupling allowing to couple two of such floor panels to each other such that a locking is created in a vertical direction perpendicular to a plane of the coupled panels, as well as in a horizontal direction perpendicular to a coupled edge and in the plane of the coupled panels, the mechanical coupling being in the substrate material.

A non-carbohydrate polyhydroxy component(s) is used in a binder composition to facilitate manufacture of wood particle boards.

A non-carbohydrate polyhydroxy component(s) is used in a binder composition to facilitate manufacture of wood particle boards.