US 12,138,824 B2
Process for manufacturing and finishing improved engineered wood siding
Gareth Paul Merrick, Gig Harbor, WA (US); David L. Stackhouse, North Wiles, NC (US); Tommy R. Wyatt, Millers Creek, NC (US); Eric C. Billings, McGrady, NC (US); Lance Olson, Saginaw, MN (US); and David C. Ritter, Nashville, TN (US)
Assigned to LOUISIANA-PACIFIC CORP., Nashville, TN (US)
Filed by LOUISIANA-PACIFIC CORPORATION, Nashville, TN (US)
Filed on Feb. 3, 2020, as Appl. No. 16/780,726.
Claims priority of provisional application 62/799,809, filed on Feb. 1, 2019.
Prior Publication US 2020/0247002 A1, Aug. 6, 2020
Int. Cl. B27N 3/12 (2006.01); B27N 3/04 (2006.01); B27N 7/00 (2006.01)
CPC B27N 3/12 (2013.01) [B27N 3/04 (2013.01); B27N 7/005 (2013.01)] 20 Claims
OG exemplary drawing
 
1. . A manufacturing process for producing a strand-based product, comprising the steps of:
blending cellulosic strands with one or more additives or chemicals;
forming a base mat from said cellulosic strands, said base comprising at least a bottom layer of cellulosic strands, a core layer of cellulosic strands, and a top layer of cellulosic strands;
applying one or more layers on the top layer of the base mat, said one or more layers comprising
a fines layer, said fines comprising wood particles smaller in size than the cellulosic strands and separate from the core layer, wherein the fines layer has a basis weight from about 225 pounds per thousand square feet to about 300 pounds per thousand square feet;
a first overlay layer; and
a second overlay layer;
applying heat and pressure to the base mat, the first overlay layer, and the second overlay layer in a pressing process to form a board, wherein the pressing process comprises application of a plate to produce an embossment on the upper surface of the board; and
applying, in a factory during a manufacturing process, a paint primer layer to the embossed upper surface of the board, wherein the paint primer contains a fine aggregate adapted to provide light diffraction of the embossed upper surface.