Mineral-based panel comprising grooves and a method for forming grooves
A mineral-based panel including a mineral-based core and at least one groove. The at least one groove may be provided in a rear side of the panel. The mineral-based panels may be floor panel, a building panel, a wall panel, a ceiling panel or a furniture panel. A method for forming such grooves in a mineral-based panel. Furthermore, a mineral-based panel including a mineral-based core and polymer-based lower layer(s) attached to the core. A locking system of the panel includes a strip extending horizontally beyond an upper portion of the panel, and a horizontal portion of the strip is entirely formed in the polymer-based lower layer(s).
1. A mineral-based floor panel comprising
a mineral-based core,
wherein the mineral-based core comprises magnesium oxide,
wherein the mineral-based core further comprises magnesium chloride and/or magnesium sulphate,
wherein the panel comprises at least one groove, and
wherein the at least one groove is provided in a rear side of the panel, between two coplanar lowermost surfaces of the floor panel.
2. The mineral-based panel according to claim 1 , wherein the mineral-based core further comprises magnesium sulphate.
3. The mineral-based panel according to claim 1 , wherein the at least one groove is provided in a lower side of the mineral-based core.
4. The mineral-based panel according to claim 1 , further comprising a lower arrangement comprising at least one lower layer being attached to a lower side of the mineral-based core.
5. The mineral-based panel according to claim 4 , wherein the at least one groove is at least partly provided in the lower arrangement between two opposing lowermost edges of the at least one lower layer.
6. The mineral-based panel according to claim 4 , wherein the lower arrangement comprises at least one polymer-based layer.
7. The mineral-based panel according to claim 6 , wherein said at least one polymer-based layer is at least one thermoplastic layer.
8. The mineral-based panel according to claim 6 , wherein said at least one polymer-based layer is at least one thermosetting layer.
9. The mineral-based panel according to claim 1 , further comprising an upper arrangement comprising at least one upper layer being attached to an upper side of the mineral-based core.
10. The mineral-based panel according to claim 9 , wherein the upper arrangement comprises at least one polymer-based layer.
11. The mineral-based panel according to claim 10 , wherein said at least one polymer-based layer is at least one thermoplastic layer.
12. The mineral-based panel according to claim 10 , wherein said at least one polymer-based layer is at least one thermosetting layer.
13. The mineral-based panel according to claim 1 , wherein the at least one groove is provided in the core, the core being provided between an upper and a lower arrangement.
14. The mineral-based panel according to claim 1 , further comprising a cover layer at least partly covering the at least one groove.
15. The mineral-based panel according to claim 1 , further comprising at least one reinforcement layer.
16. The mineral-based panel according to claim 1 , comprising a plurality of grooves, wherein at least two grooves have different characteristics.
17. The mineral-based panel according to claim 1 , wherein said at least one groove is provided in an interior of the rear side being spaced from a pair of opposite edge portions of the panel.
18. The mineral-based panel according to claim 1 , wherein the at least one groove is continuous or discontinuous.
19. The mineral-based panel according to claim 1 , comprising at least two groove arrangements.
20. The mineral-based panel according to claim 1 , wherein the at least one groove is provided in a surface, and an area of the surface is less than 90% of an area of a front side of the panel.
21. A mineral-based panel comprising
a mineral-based core, and
a lower arrangement comprising at least one polymer-based lower layer, the lower arrangement being attached to a lower side of the mineral-based core,
wherein the mineral-based panel further comprises a locking system for horizontal and/or vertical locking, said locking system comprising a strip extending horizontally beyond an upper portion of the mineral-based panel,
wherein at least a horizontal portion of the strip is entirely formed in the lower arrangement, and
wherein a horizontal and/or vertical locking surface is provided on the at least one polymer-based lower layer, the horizontal and/or vertical locking surface being configured, when locking the panel to a similar panel, to horizontally and/or vertically lock to a second locking system of the similar panel.
22. The mineral-based panel according to claim 21 , wherein the strip comprises a locking element.
23. The mineral-based panel according to claim 21 , wherein the horizontal portion comprises the entire strip, wherein the entire strip is formed in the at least one polymer-based lower layer.
24. The mineral-based panel according to claim 21 , wherein the locking element comprises a portion of the mineral-based core.
25. The mineral-based panel according to claim 21 , wherein the horizontal locking system comprises a locking element and a locking groove, and/or wherein the vertical locking system comprises a tongue and a tongue groove.
26. The mineral-based panel according to claim 21 , wherein a horizontal extension of the tongue from a vertical plane (VP) is smaller than an extension of the strip from a vertical plane (VP).
27. The mineral-based panel according to claim 21 , wherein said polymer-based lower layer is a thermoplastic layer.
28. The mineral-based panel according to claim 21 , wherein said polymer-based lower layer is at least one a thermosetting layer.
29. The mineral-based panel according to claim 21 , wherein the mineral-based core comprises magnesium oxide and, optionally, magnesium chloride and/or magnesium sulphate.
30. The mineral-based panel according to claim 21 , wherein the mineral-based core comprises cement.
31. The mineral-based panel according to claim 21 , further comprising an upper arrangement comprising at least one upper layer being attached to an upper side of the mineral-based core.
32. The mineral-based panel according to claim 31 , wherein the upper arrangement comprises at least one polymer-based layer.
33. The mineral-based panel according to claim 21 , further comprising at least one reinforcement layer.
34. The mineral-based panel according to claim 33 , wherein the at least one reinforcement layer is provided in the mineral-based core.
35. The mineral-based panel according to claim 33 , wherein at least one reinforcement layer is positioned in a top portion and/or a bottom portion of the mineral-based core.
36. The mineral-based panel according to claim 33 , wherein the at least one reinforcement layer is provided in the upper and/or the lower arrangement.