Wood fiber-glass composite

Patent metadata

Field	Value
Publication number	US-12403623-B2
Application number	US-202418767036-A
Country	US
Kind code	B2
Filing date	Jul 9, 2024
Priority date	Feb 15, 2019
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

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.

First claim

What is claimed is:

1. A method of making an engineered wood product, the method comprising:
mixing glass fibers, wood fibers, and a resin to form a fibrous mixture;
wherein the glass fibers and wood fibers comprise 80% to 98% by weight of the fibrous mixture, and glass fibers make up 1% to 60% of the total weight of glass fibers and wood fibers;
wherein the resin is selected from a urea-formaldehyde binder present in an amount of 5% to 20% by weight of the fibrous mixture and a MDI binder present in an amount of 2% to 7% by weight of the fibrous mixture;
forming the fibrous mixture into a desired shape; and
curing the resin to form an engineered wood product.

2. The method of claim 1 , wherein the curing step comprises at least one of heating the fibrous mixture and applying pressure to the fibrous mixture.

3. The method of claim 1 , wherein curing comprises both heating the fibrous mixture and applying pressure to the fibrous mixture.

4. The method of claim 1 , wherein the mixture is heated while pressure is applied.

5. The method of claim 1 , wherein the glass fibers are shredded prior to mixing.

6. The method of claim 1 , wherein mixing comprises mixing wood fibers and glass fibers prior to adding the resin to the mixture.

7. The method of claim 1 , wherein mixing comprises mixing wood fibers and the resin prior to adding the glass fibers to the mixture.

8. The method of claim 1 , wherein the resin is a urea-formaldehyde binder and is present in an amount of 5% to 20% by weight of the engineered wood product.

9. The method of claim 1 , wherein the resin is a MDI binder and is present in an amount of 2% to 7% by weight of the engineered wood product.

10. The method of claim 1 , wherein the glass fibers are present in an amount of 4% to 50% by weight of the fibrous mixture.

11. The method of claim 10 , wherein the glass fibers and wood fibers are mixed by a combination of mechanical means and directed air.

12. The method of claim 1 , wherein the glass fibers have an average diameter of 0.5microns to 350 microns.

13. The method of claim 1 , wherein the glass fibers have an average length of 2microns to 25 millimeters.

14. The method of claim 1 , wherein the engineered wood product is in the form of a high-density board.

Assignees

• Owens Corning Intellectual Capital Llc

Inventors

• Akbarian-Tefaghi Sara
• O'Leary Robert
• Kennedy Colleen N

Classifications

• B27N3/203

  with heating or cooling means · CPC title

• B27N3/007

  and at least partly composed of recycled material · CPC title

• B27N3/002

  characterised by the type of binder (compositions of macromolecular compounds C08L) · CPC title

• B27N1/02

  Mixing the material with binding agent (mixing in general B01F) · CPC title

• B27N3/04 Primary

  from fibres · CPC title