Fire-retardant-treated wood composite panels for exterior applications or weather exposure during constructions
AssigneeLouisiana-Pacific Corp.
InventorsJianwen Ni, Brian St. Germain, Scott Johnson, Jeffrey Yelle
Life of this patent
Estimating the term…
Abstract
A multi-layer fire-resistance treatment (FRT) panel for use as structural sheathing. The wood structural panel may be OSB or plywood, coated or treated during the manufacturing process with a product that provides fire resistance. The treatment may be integrated with the material forming the wood structural panel, or may be a coating layer applied to the mat or mat layer. A burn-through layer also may be applied. A protective layer comprising a resin-impregnated paper overlay may be applied on one or both sides of the panel.
Claims18
A method of producing a fire-resistant integrated structural sheathing panel, comprising the steps of:
- producing wood strands, flakes or chips;
- treating some or all of the wood strands, flakes or chips with fire-resistant chemicals or additives, or both;
- forming, in a production line, a mat with one or more layers from said treated wood strands, flakes or chips, said mat comprising a top surface and bottom surface;
- applying a first burn-through resistant coating layer to the top surface of the mat;
- applying a first resin-impregnated paper overlay to an upper side of the burn-through resistant coating layer opposite the top surface of the mat;
- applying, in said production line using a production press, heat and pressure to the mat, burn-through resistant coating and resin-impregnated paper overlay to form a board with a first surface and a second surface, wherein the first surface comprises the first burn-through resistant coating layer and the first paper overlay;
- and
- applying, after the step of applying heat and pressure, a second burn-through resistant coating on the first surface over the first paper overlay, wherein the second burn-through resistant coating comprises a magnesium oxide coating or a cement-based coating.
A method of producing a fire-resistant integrated structural sheathing panel, comprising the steps of:
- producing wood strands, flakes or chips;
- treating some or all of the wood strands, flakes or chips with chemicals or additives, or both;
- forming, in a production line, a mat with one or more layers from said treated wood strands, flakes or chips, said mat comprising a top surface and bottom surface;
- applying a first fire-resistant coating layer to the top surface of the mat;
- applying a first burn-through resistant coating layer over the first fire-resistant coating on the top surface of the mat;
- applying a first resin-impregnated paper overlay over the burn-through resistant coating layer on the top surface of the mat;
- and
- applying, in said production line using a production press, heat and pressure to the mat, first fire-resistant coating layer, first burn-through resistant coating and first resin-impregnated paper overlay to form a board with a first surface and a second surface, wherein the first surface comprises the first fire-resistant coating layer, the first burn-through resistant coating layer and the first paper overlay.
A method of producing a fire-resistant integrated structural sheathing panel, comprising the steps of:
- producing wood strands, flakes or chips;
- treating some or all of the wood strands, flakes or chips with fire-resistant chemicals or additives, or both;
- forming, in a production line, a mat with one or more layers from said treated wood strands, flakes or chips, said mat comprising a top surface and bottom surface;
- applying a first weather-resistant overlay to the top surface of the mat;
- applying, in said production line using a production press, heat and pressure to the mat, burn-through resistant coating and resin-impregnated paper overlay to form a board with a first surface and second surface;
- after the step of applying heat and pressure, applying a first fire-resistant coating layer to the first surface of the board.
Dependencies are inferred from the claim text.