Composite board with OSB faces
AssigneeNorbord Inc.
InventorsAlex Nadezhdin, Wallace S. Pettersen, Maurice Poirier
Life of this patent
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Abstract
A method and structure is disclosed for oriented strand boards that utilize a 3-layer, sandwich-type structural panel. The two outer faces are preferably made of wood flakes and the inner core preferably is made out of compression resistant products such as wood chips, paper mill sludge or recycled paper. The core is either a continuous perforated mat or a plurality of individual chunks of compression resistant materials, and preferably contains voids to provide for a reduction in weight of the board.
Claims36
An oriented strand board composite structure comprising:
- a first oriented strand face having a layer of wood flakes mixed with a thermoset resin binder;
- a second oriented strand face having a layer of wood flakes mixed with a thermoset resin binder;
- and
- a core provided between said first oriented strand face and said second oriented strand face, said core comprising a perforated mat that is oriented such that the perforation boundaries are essentially orthogonal to the orientation of said first and second oriented strand faces.
An oriented strand board composite structure comprising:
- a first oriented strand face having a layer of wood flakes mixed with a thermoset resin binder;
- a second oriented strand face having a layer of wood flakes mixed with a thermoset resin binder;
- and
- a core provided between said first oriented strand face and said second oriented strand face, said core comprising a plurality of individual chunks of compression-resistant material that are oriented such that void boundaries are in a direction essentially orthogonal to the orientation of said first and second oriented strand faces.
A method for manufacturing an oriented strand board comprising the steps of:
- depositing a first layer of wood flakes mixed with a thermoset resin binder, with a horizontal orientation;
- depositing a core layer of a perforated mat on an upper surface of the first layer of wood flakes so that the perforation boundaries are essentially orthogonal to the orientation of the first layer of wood flakes;
- depositing a second layer of wood flakes mixed with a thermoset resin binder on an upper surface of the core layer with the same horizontal orientation as that of the first layer of wood flakes;
- and
- applying heat and pressure to the layers in a single hot pressing step.
A method for manufacturing an oriented strand board, comprising the steps of:
- depositing a first layer of wood flakes mixed with a thermoset resin binder, with a horizontal orientation;
- depositing a core layer of a plurality of individual chunks of compression-resistant material that are oriented such that the void boundaries are orthogonal to the orientation of the first layer of wood flakes;
- depositing a second layer of wood flakes mixed with a thermoset resin binder on an upper surface of the core layer with the same horizontal orientation as that of the first layer of wood flakes;
- and
- applying heat and pressure to the layers in a single hot pressing step.
Dependencies are inferred from the claim text.