Plasterboards and methods for making them

1. A method of forming a plasterboard,

the method comprising:

loading an extruder with a moldable material;

providing a first liner having a first surface and a second surface and a second liner having a first surface and a second surface;

extruding the moldable material through a die to form a layer of moldable material having a first surface disposed against the second surface of the first liner;

molding a surface relief comprising a plurality of raised features on the second surface of the layer of moldable material to provide a layer of molded material;

and thereafter,

contacting first surface of the first liner with a layer of wet plaster material, such that the second surface of the first liner faces away from the layer of wet plaster material;

contacting the first surface of the second liner with the layer of wet plaster material, such that the second surface of the second liner faces away from the layer of wet plaster material;

and thereafter

drying the layer of wet plaster material to form the layer of hardened plaster material, the method resulting in a plasterboard comprising

the layer of hardened plaster material, having a first surface and an opposed second surface;

the first liner, the first surface of the first liner contacting the first surface of the layer of hardened plaster;

the second liner, the first surface of the second liner contacting the second surface of the layer of hardened plaster; and

the layer of molded material, the first surface of the layer of molded material being disposed against the second surface of the first liner, the second surface of the layer of molded material facing away from the layer of hardened plaster material, the second surface of the layer of molded material having the surface relief comprising the plurality of raised features, the plurality of raised features occupying at least 30% of a surface area of the second surface of the layer of molded material.

2. The method of claim 1 , wherein the plurality of raised features comprise:

a first plurality of raised ridges that are substantially parallel to each other in a first section; and

a second plurality of raised ridges that are substantially parallel to each other in a second section adjacent to the second section,

wherein the raised ridges of the first plurality are not parallel with the raised ridges of the second plurality.

3. The method of claim 1 , wherein the plurality of raised features comprise:

a first plurality of raised ridges that are substantially parallel to each other; and

a second plurality of raised ridges that are substantially parallel to each other,

wherein the raised ridges of the first plurality are not parallel with the raised ridges of the second plurality.

4. The method of claim 1 , wherein the plurality of raised features comprise a plurality of raised ridges that are parallel to each other.

5. The method of claim 1 , wherein the plurality of raised features have one or more of a cross-hatched pattern or a honeycomb pattern.

6. The method of claim 1 , wherein the hardened plaster material comprises a gypsum material.

7. The method of claim 1 , wherein the surfaces of the first liner are substantially flat.

8. The method of claim 1 , wherein the molded material is a polymeric material or is a substantially inorganic material.

9. The method of claim 1 , wherein the layer of molded material covers at least 75% of the second surface of the first liner.

10. The method of claim 1 , wherein the plurality of raised features occupy a fraction of a surface area of the second surface of the layer of molded material in the range of 30-90%.

11. The method of claim 1 , wherein the layer of molded material has a thickness within a range of 10 μm to 7000 μm.

12. The method of claim 1 , wherein the plurality of raised features comprise one or more features having a depth within a range of 10-7000 μm.

13. The method of claim 1 , wherein the plurality of raised features comprise one or more features having a depth within a range of 100-3000 μm.

14. The method of claim 1 , wherein the plurality of raised features have an average spacing within a range of 0.1 mm to 5 mm.

15. The method of claim 14 , wherein the plurality of raised features have depths within a range of 10-500 μm.

16. The method of claim 1 , wherein the plurality of raised features have an average spacing within a range of 1 mm to 5 mm.

17. The method of claim 1 , the method further comprising bonding, using an adhesive, a layer of foam-based material, wood, or a mineral wool to the second surface of the layer of molded material.

18. The method of claim 1 , the method further comprising bonding, using an adhesive, an insulation layer that is a layer of foam-based material or mineral wool to the second surface of the layer of molded material.

19. The method of claim 17 , wherein the adhesive is a cement-based adhesive, and wherein the layer of molded material includes particles of one or more cementitiously-active substances mixed therein.

20. The method of claim 1 , wherein the layer of molded material has a thickness within a range of 50 μm to 2500 μm.