Building panel with sections

Patent metadata

Field	Value
Publication number	US-12044008-B2
Application number	US-201817414813-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Dec 21, 2018
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

A building panel with a high degree of isotropy with regard to the load bearing capacity and flexural strength. The building panel includes a first section and a second section, each section including at least one layer, each of the at least one layer having fibers, whereby the fibers are distributed substantially homogeneously throughout each layer, substantially parallel to the main surfaces of the panel and oriented predominantly in the same direction and the sections are firmly joined in transverse direction, and the first section is thinner than the second section.

First claim

The invention claimed is:

1. A building panel comprising:
a first section and a second section, each section including at least one layer, each of the at least one layer comprising fibers mixed within a binding material;
the fibers are distributed substantially homogeneously throughout each layer, substantially parallel to the main surfaces of the panel and oriented predominantly in the same direction;
the first and second sections are firmly joined in transverse direction;
the first section is thinner than the second section;
the first section makes up at least 5% of the thickness of the panel and at most 30% of the thickness of the panel;
the building panel has a fiber content of 5% to 25% by weight;
the building panel comprises at least 50% by weight cementitious material, and
the building panel has a degree of isotropy greater than or equal to 0.83 with regard to its load bearing capacity when determining the failure load according to EN 12825 (2001) with the first section beneath the second section.

2. The building panel according to claim 1 , wherein the building panel is used in a floor.

3. The building panel according to claim 1 , wherein the first section makes up at least 10% of the thickness of the panel and at most 18% of the thickness of the panel.

4. The building panel according to claim 1 , wherein the second section has a 2.5 to 10 times greater thickness compared to the first section.

5. The building panel according to claim 1 , wherein the at least one layer comprises a plurality of lamina comprising fibers in the same orientation.

6. The building panel according to claim 1 , wherein the building panel is a gypsum fiberboard or a cement fiberboard and wherein the building panel has a monolithic appearance.

7. The building panel according to claim 1 , wherein the fibers are of: mineral origin, synthetic origin, biological origin, or a combination thereof.

8. The building panel according to claim 1 , wherein:
the fibers have a mean length of 1 mm to 5 mm;
the fibers have a mean diameter of 15 μm to 50 μm; or
both.

9. The building panel according to claim 1 , wherein the building panel has a degree of isotropy greater than or equal to 0.88 with regard to the flexural strength when determining the flexural strength according to EN 15283-2 (2009).

10. The building panel according to claim 1 , wherein the building panel has a density greater than 1200 kg/m3 and less than 2000 kg/m3.

11. The building panel according to claim 1 , wherein at least one of:
the first section and the second section are joined by pressure before the binding material has set; or
the first section and the second section are joined without the use of an adhesive.

12. The building panel according to claim 1 , wherein the fibers are in the form of pulp which is prepared from recycled paper, cardboard, or a combination of paper and cardboard, and wherein the fibers comprise approximately 80% cellulose.

13. A building panel comprising:
a first section and a second section, each section including at least one layer, each of the at least one layer comprising fibers mixed within a binding material;
the fibers are distributed substantially homogeneously throughout each layer, substantially parallel to the main surfaces of the panel and oriented predominantly in the same direction;
the first and second sections are firmly joined in transverse direction;
the first section is thinner than the second section;
the first section makes up at least 5% of the thickness of the panel and at most 30% of the thickness of the panel;
the second section includes at least two layers oriented in the same direction relative to the orientation of the at least one layer of the first section;
the building panel comprises at least 50% by weight cementitious material; and
the building panel has a degree of isotropy greater than or equal to 0.83 with regard to its load bearing capacity when determining the failure load according to EN 12825 (2001) with the first section beneath the second section.

14. A building panel comprising:
a first section, a second section, and a third section, each section including at least one layer, each of the at least one layer comprising fibers mixed within a binding material;
the fibers are distributed substantially homogeneously throughout each layer, substantially parallel to the main surfaces of the panel and oriented predominantly in the same direction;
the first and second sections are firmly joined in transverse direction, and the second and third sections are firmly joined in transverse direction;
the first section is thinner than the second section;
the first section makes up at least 5% of the thickness of the panel and at most 30% of the thickness of the panel; and
the building panel comprises at least 50% by weight cementitious material; and
the building panel has a degree of isotropy greater than or equal to 0.88 with regard to the flexural strength when determining the flexural strength according to EN 15283-2 (2009).

15. The building panel according to claim 14 , wherein the building panel has a degree of isotropy greater than or equal to 0.83 with regard to its load bearing capacity when determining the failure load according to EN 12825 (2001) with the first section beneath the second section.

Assignees

• Knauf Gips Kg

Inventors

• Maun André

Classifications

• E04C2/043 Primary

  of plaster (E04C2/049 takes precedence) · CPC title

• B32B2607/00

  Walls, panels · CPC title

• B32B2471/00

  Floor coverings (B32B2419/04 takes precedence) · CPC title

• B32B2307/72

  Density · CPC title

• B32B2307/708

  Isotropic · CPC title