Pre-consolidated fines layer for improved engineered wood products

Patent metadata

Field	Value
Publication number	US-12227944-B2
Application number	US-202217848913-A
Country	US
Kind code	B2
Filing date	Jun 24, 2022
Priority date	Jun 24, 2021
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

An engineered wood based siding, cladding or panel with a pre-consolidated fines layer (PCF) applied to the top of the main strand matrix layers to minimize telegraphing and provide an improved surface appearance. The PCF is consolidated prior to application to the surface of the strand matrix or mat, and takes the place of a loose fines layer. The PCF prevents the loss of fines into the strand matrix, effectively keeping the fines at the surface so they can effectively and efficiently function to prevent or eliminate strand telegraphing, and provide a smooth finished surface for the product.

First claim

What is claimed is:

1. An improved method of producing an engineered wood product, comprising the steps of:
forming a multi-layer strand matrix on a production line, said strand matrix comprising a top surface;
applying a pre-consolidated fines layer on the top surface of the strand matrix, said pre-consolidated fines layer comprising a plurality of fines consolidated on a paper layer prior to application of the pre-consolidated fines layer to the top surface of the strand matrix, and further comprising an upper surface with at least some of the plurality of fines opposite the strand matrix; and
consolidating and bonding the strand matrix and pre-consolidated fines layer together using heat and/or pressure.

2. The method of claim 1 , wherein the pre-consolidated fines layer is configured to prevent the passage of fines from the pre-consolidated fines layer into the strand matrix.

3. The method of claim 1 , wherein the pre-consolidated fines layer further comprises fabric.

4. The method of claim 3 , wherein the fabric is a non-woven synthetic or natural material.

5. The method of claim 3 , wherein the fabric is a woven synthetic or natural material.

6. The method of claim 1 , wherein the pre-consolidated fines layer further comprises a plastic film, or glue or adhesive film.

7. The method of claim 1 , wherein the paper layer in the pre-consolidated fines layer comprises a resin-impregnated or resin-saturated paper.

8. The method of claim 1 , wherein the pre-consolidated fines layer partially or fully melts during the step of consolidating and bonding.

9. The method of claim 1 , wherein the pre-consolidated fines layer comprises a stiffener.

10. The method of claim 1 , wherein the pre-consolidated fines layer provides one or more of the following: fire resistance; fungal resistance; moisture resistance; and sound dampening.

11. The method of claim 1 , further comprising the step of an applying an overlay on the upper surface of the pre-consolidated fines layer.

12. The method of claim 1 , wherein the step of consolidating and bonding comprises application of heat and pressure using a hot press.

13. The method of claim 1 , wherein the step of consolidating and bonding comprises application of pressure using a cold press.

14. The method of claim 1 , wherein the step of consolidating and bonding comprises application of microwaves with or without a heated platen.

15. The method of claim 1 , wherein the step of consolidating and bonding comprises application of super-heated steam.

Assignees

• Louisiana Pacific Corp

Inventors

• Merrick Gareth Paul
• St Germain Brian

Classifications

• B32B2607/02

  Wall papers, wall coverings · CPC title

• B32B2419/00

  Buildings or parts thereof · CPC title

• B32B2317/12

  Paper, e.g. cardboard · CPC title

• B32B2310/0862

  using microwave · CPC title

• B32B2307/7246

  Water vapor barrier · CPC title