Method to produce mineral wool boards

1. A method for manufacturing a mineral wool board comprising the following steps in the given order:

a) providing mineral wool fibers with a fiber length of 50 to 800 μm;

b) gluing the fibers with a liquid binder comprising phenolic resin, whereby the ratio of binder to mineral wool fibers is 5 to 30 parts by weight with respect to 100 parts by weight of mineral wool fibers, and

c) pressing the glued fibers using heat and pressure to a density of more than 500 kg/m 3 .

2. The method according to claim 1 , wherein additives are included in the binder.

3. The process according to claim 2 , wherein the additives are mineral fillers, including one or more of kaolin, quartz flour, limestone and/or alumina.

4. The method according to claim 3 , wherein the mineral fillers have an average grain size d 50 from 10 nm to 250 μm.

5. The method according to claim 3 , wherein the mineral fillers are added in an amount of 5 to 150% by weight based on the mass of the solids content of the resin in the liquid binder.

6. The method according to claim 1 , wherein the mineral wool fibers have a fiber length of 60 to 700 μm.

7. The method according to claim 1 , wherein the step of pressing the glued fibers takes place at temperatures between 130-180° C. and a specific pressing pressure of 15 to 35 bar.

8. The method according to claim 1 , wherein the ratio of binder, based on the solids content of the resin in the binder, to mineral wool fibers is 10 to 30% by weight.

9. The method according to claim 1 , wherein the gluing of the mineral wool fibers with binder is carried out in a blow line.

10. The method according to claim 1 , wherein the mineral wool fibers are glued with binder by means of mechanical gluing.

11. The method according to claim 1 , wherein the pressing is carried out in a continuous double-belt press.

12. The method according to claim 1 , wherein the binder is liquid phenolic resin.

13. The method according to claim 1 , wherein after pressing, the mineral wool board thus obtained is further processed into a floor panel.

14. The method according to claim 1 , wherein the glued fibers are pressed using heat and pressure in such a way that the resulting board has a density of more than 700 kg/m 3 .

15. A method for manufacturing a mineral wool board comprising the following steps in the given order:

a) providing mineral wool fibers with a fiber length of 50 to 800 μm;

b) gluing the fibers with a liquid binder comprising phenolic resin, whereby the ratio of binder to mineral wool fibers is 5 to 30 parts by weight with respect to 100 parts by weight of mineral wool fibers, and

c) pressing the glued fibers using heat and pressure to a density of more than 500 kg/m 3 ;

wherein the mineral wool fibers are glass wool fibers and/or rock wool fibers.

16. A mineral wool board comprising:

mineral wool fibers with a fiber length of 50 to 800 μm;

binder in the form of cured resin;

mineral fillers with an average grain size d 50 of 10 nm to 250 μm, wherein the mineral wool board has a density of more than 500 kg/m 3 .

17. The mineral wool board according to claim 16 , wherein the mineral fillers comprise one or more of caoline, quartz flour, limestone and/or aluminum oxide.

18. The mineral wool board according to claim 16 , wherein the mineral fillers have an average grain size d 50 of 10 nm to 250 μm.

19. The mineral wool board according to claim 16 , wherein the mineral wool fibers have a fiber length of 60 to 700 μm.

20. The mineral wool board according to claim 16 , wherein the ratio of binder, based on the solids content of the resin of the binder, to mineral wool fibers is 10 to 30% by weight.

21. The mineral wool board according to claim 16 , wherein the mineral wool board has a density of more than 700 kg/m 3 .

22. The mineral wool board according to claim 16 , wherein the binder is in the form of cured phenolic resin.