Decorative panel

1. A panel comprising a core and a decorative top layer provided thereon;

wherein the core comprises a magnesium oxide-based board material forming at least half of a thickness of the panel, and wherein the panel, on at least two opposite edges, is provided with coupling means arranged for two of such panels to be interlocked at the respective edges;

wherein the coupling means is arranged for locking in a horizontal direction and a vertical direction, the coupling means are formed as a tongue and groove connection such that the groove is bordered by an upper lip and a lower lip, the lower lip extending in the horizontal direction beyond the upper lip;

wherein a first reinforcement layer is located along a first side of a thickness of the core and a second reinforcement layer is located along a second side of a thickness the core, the thickness of the core being defined between the first and second reinforcement layers;

wherein the first reinforcement layer, on the first side of the thickness of the core is flanked by a second layer of the magnesium oxide-based board material;

wherein the second layer of magnesium oxide-based board material comprises less fillers than at a central portion or central layer of the aforementioned magnesium oxide-based board material.

2. The panel according to claim 1 , wherein the magnesium oxide-based board material comprises the first reinforcement layer including a glass fiber layer.

3. The panel according to claim 1 , wherein the second layer of magnesium oxide-based board material is free from fillers.

4. The panel according to claim 1 , wherein the coupling means are realized at least partially in one piece with the magnesium oxide-based board material.

5. The panel according to claim 1 , wherein the decorative top layer comprises at least a printed decor.

6. The panel according to claim 1 , wherein the decorative top layer comprises a carrier sheet printed with a decor.

7. The panel according to claim 6 , wherein the carrier sheet is a paper sheet or a plastic foil.

8. The panel according to claim 6 , wherein said carrier sheet is bonded via one or more intermediate layers with a glue layer to said magnesium oxide-based board material.

9. The panel according to claim 1 , wherein the decorative top layer comprises a decor formed directly on the panel.

10. The panel according to claim 1 , wherein the decorative top layer includes a transparent or translucent wear layer provided above the printed decor.

11. The panel according to claim 1 , wherein the panel, on a side which is directed away from the decorative top layer, comprises a sublayer of a material which is softer than the magnesium oxide-based board material.

12. The panel according to claim 1 , wherein the first reinforcement layer extends uninterruptedly in the lower lip.

13. The panel according to claim 1 , wherein the second reinforcement layer extends uninterruptedly in the upper lip.

14. The panel according to claim 1 , wherein a center of core extends along the thickness of the panel from a central line bisecting the core.

15. The panel according to claim 1 , wherein the first reinforcement layer is embedded with reinforcement fibers.

16. The panel according to claim 1 , wherein the first reinforcement layer further comprises openings such that the magnesium-oxide board material is continuous through the openings.

17. The panel according to claim 1 , wherein the lower lip is in a bent condition.

18. A panel comprising a core and a decorative top layer provided thereon;

wherein the core comprises a magnesium oxide-based board material forming at least half of a thickness of the panel, and wherein the panel, on at least two opposite edges, is provided with coupling means arranged for two of such panels to be interlocked at the respective edges;

wherein the coupling means is arranged for locking in a horizontal direction and a vertical direction, the coupling means are formed as a tongue and groove connection such that the groove is bordered by an upper lip and a lower lip, the lower lip extending in the horizontal direction beyond the upper lip;

wherein a first reinforcement layer is located along a first side of a thickness of the core and a second reinforcement layer is located along a second side of a thickness the core, the thickness of the core being defined between the first and second reinforcement layers;

wherein the first reinforcement layer, on the first side of the thickness of the core is flanked by a second layer of the magnesium oxide-based board material;

wherein the second layer of magnesium oxide-based board material comprises fillers with an average particle size which is smaller than the fillers in a central portion or central layer of the aforementioned magnesium-oxide board material.

19. The panel according to claim 18 , wherein the first reinforcement layer extends uninterruptedly in the lower lip.

20. A panel comprising a core and a decorative top layer provided thereon;

wherein the core comprises a magnesium oxide-based board material forming at least half of a thickness of the panel, and wherein the panel, on at least two opposite edges, is provided with coupling means arranged for two of such panels to be interlocked at the respective edges;

wherein the coupling means is arranged for locking in a horizontal direction and a vertical direction, the coupling means are formed as a tongue and groove connection such that the groove is bordered by an upper lip and a lower lip, the lower lip extending in the horizontal direction beyond the upper lip;

wherein the magnesium oxide-based board material comprises a first reinforcement layer including a glass fiber layer, wherein the reinforcement layer is arranged on a first side of the thickness of the magnesium oxide-based board material;

wherein the thickness of the magnesium oxide-based board material forms a center of the core;

wherein the first reinforcement layer, on the first side of the thickness of the magnesium oxide-based board material is flanked by a second layer of the magnesium oxide-based board material;

wherein the second layer of magnesium oxide-based board material comprises less fillers than at a central portion or central layer of the aforementioned magnesium oxide-based board material.

21. The panel according to claim 20 , wherein the first reinforcement layer extends uninterruptedly in the lower lip.

22. A panel comprising a core and a decorative top layer provided thereon;

wherein the core comprises a magnesium oxide-based board material forming at least half of the thickness of the panel, and wherein the panel, on at least two opposite edges, is provided with coupling means arranged for two of such panels to be interlocked at the respective edges;

wherein the coupling means is arranged for locking in a horizontal direction and a vertical direction, the coupling means are formed as a tongue and groove connection such that the groove is bordered by an upper lip and a lower lip, the lower lip extending in the horizontal direction beyond the upper lip;

wherein the magnesium oxide-based board material comprises a first reinforcement layer including a glass fiber layer, wherein the reinforcement layer is arranged on a first side of a thickness of the magnesium oxide-based board material;

wherein the thickness of the magnesium oxide-based board material forms a center of the core;

wherein the first reinforcement layer, on the first side of the thickness of the magnesium oxide-based board material is flanked by a second layer of the magnesium oxide-based board material;

wherein the second layer of magnesium oxide-based board material comprises fillers with an average particle size which is smaller than the fillers in a central portion or central layer of the aforementioned magnesium-oxide board material.

23. The panel according to claim 22 , wherein the first reinforcement layer extends uninterruptedly in the lower lip.