Panel and method of producing such a panel

1. A panel comprising:

a core layer, comprising a mineral or a cementitious material;

at least two reinforcing layers situated in said core layer;

wherein the core layer comprises at least 70% in weight of mineral or cementitious material, said core layer further comprising a first pair of opposite edges, wherein a first edge of said first pair of opposing edges comprises a first coupling part, and wherein a second edge of said first pair of opposing edges comprises a complementary second coupling part, said coupling parts allowing a plurality of panels to be mutually coupled;

wherein the first coupling part comprises a sideward tongue extending in a direction substantially parallel to a plane defined by the panel, and wherein the second coupling part comprises a groove configured for accommodating at least a part of the sideward tongue of another panel, said groove being defined by an upper lip and a lower lip,

wherein:

the at least two reinforcing layers extend in a direction substantially parallel to the plane defined by the panel to allow one of the at least two reinforcing layers to be selectively situated at a level between 40 and 60 percent of a thickness from

a top surface of the panel to a bottom surface of the tongue, and

a bottom surface of the panel to an upper surface of the lower lip.

2. The panel according to claim 1 , wherein there are two reinforcing layers and one of the at least two reinforcing layers is situated in the core at a level between between 40 and 60 percent of the thickness from the top surface of the core to the bottom surface of the tongue, or wherein the other one of the at least two reinforcing layers is situated in the core, extending parallel to the plane of the panel, at a level between 40 and 60 percent of the thickness from the bottom surface of the core to the top surface of the groove.

3. The panel according to claim 2 , wherein the at least two reinforcing layers are selected from the group consisting of fiberglass, polypropylene, cotton, PET (polyethylene terephthalate), silica and nylon.

4. The panel according to claim 1 , wherein at least one reinforcing layer comprises a mesh, sheet, or web material.

5. The panel according to claim 1 , wherein the core layer comprises MgO, Magnesium Oxy Chloride, Magnesium Oxy Sulfate, MgCl2, MgSO4, and/or MgCO3 or a binder.

6. The panel according to claim 5 , wherein the core layer comprises at least 70% in weight of MgO, Magnesium Oxy Chloride, Magnesium Oxy Sulfate, MgCl2, MgSO4, MgCO3 and a binder.

7. The panel according to claim 1 , wherein the core layer has a thickness between 3 and 8 mm.

8. The panel according to claim 1 , wherein the tongue and groove respectively have a thickness between 1 and 3 mm.

9. The panel according to claim 1 , further comprising a laminate of said core layer and at least one of:

a decorative top layer;

an acoustic dampening layer; and

a balancing layer.

10. The panel according to claim 1 , wherein one of the at least two reinforcing layers is situated at a center of the core.

11. The panel as according to claim 1 , wherein the core layer has a thickness between 5 mm-6 mm.

12. A floor panel, wall panel, or a ceiling panel comprising:

a core layer, comprising a mineral or a cementitious material;

at least two reinforcing layers situated in said core layer; wherein the core layer comprises a first pair of opposite edges, wherein a first edge of said first pair of opposing edges comprises a first coupling part, and wherein a second edge of said first pair of opposing edges comprises a complementary second coupling part, said coupling parts allowing a plurality of panels to be mutually coupled; wherein the first coupling part comprises a sideward tongue extending in a direction parallel to a plane defined by the panel, and wherein the second coupling part comprises a groove configured for accommodating at least a part of the sideward tongue of another panel, said groove being defined by an upper lip and a lower lip,

wherein the at least two reinforcing layers extend in a direction parallel to a plane defined by the panel to allow the at least two reinforcing layers to be situated at a level between 30˜70 percent of a thickness from: a top surface of the panel to a bottom surface of the tongue, and a bottom surface of the panel to an upper surface of the lower lip respectively.