Acoustic panel
Acoustic panels, grids for acoustic panels, suspended ceiling systems and a method for producing an acoustic panel, especially a man-made vitreous fibre (MMVF) panel, having a first major face and an opposite second major face, with the first major face comprising a facing with a surface coating. To provide high light reflection the coating comprises microspheres.
1. Acoustic panel, especially a man-made vitreous fibre (MMVF) panel, having a first major face and an opposite second major face, with the first major face comprising a facing with a surface coating, wherein the surface coating comprises microspheres, wherein the average diameter of the microspheres is in the interval of 10-200 μm;
wherein the facing is a non-woven or a felt having an air permeability of 400-900 l/m 2 /s;
wherein the surface coating includes pinholes.
2. Acoustic panel according to claim 1 , wherein the microspheres are made of silica, ceramic or glass.
3. Acoustic panel according to claim 1 , wherein the average diameter of the microspheres is in the interval of 10-120 μm.
4. Acoustic panel according to claim 1 , wherein the panel is a MMVF panel having a density in the range of 40-150 kg/m 3 .
5. Acoustic panel according to claim 1 , wherein the facing is based on glass fibres.
6. Suspended ceiling system comprising an acoustic panel according to claim 1 and a grid comprising a surface coating on surfaces visible in the installed state of the suspended ceiling, wherein the surface coating comprises microspheres.
7. Method for producing an acoustic panel comprising the steps of: providing an acoustic panel, especially a MMVF panel, attaching a front facing to a first major face of the panel, applying a surface coating on the front facing, wherein the surface coating comprises microspheres and pinholes, wherein the facing is a non-woven or felt having an air permeability of 400-900 l/m 2 /s and wherein prior to applying the surface coating, the surface coating is conditioned to have a viscosity of 20-40 s DIN CUP4.
8. Method according to claim 7 , wherein the surface coating is applied using a low viscosity coating technique.
9. Suspended ceiling system according to claim 6 wherein the average diameter of the microspheres of the surface coating of the grid is in the interval of 10-200 μm.
10. Acoustic panel according to claim 1 , wherein the microspheres include a pigment.
11. Acoustic panel according to claim 1 , having an NRC value of at least 0.95.
12. Acoustic panel according to claim 1 , wherein the facing is white with an L-value of at least 95.
13. A highly-reflective, low gloss acoustic panel comprising:
a man-made vitreous fibre (MMVF) panel having a first major surface and a second major surface;
a facing attached to the first major surface, the facing comprising a non-woven or a felt having an air permeability of 400-900 l/m 2 /s; and
a coating applied to the facing, the coating including microspheres having an average diameter of 10-200 μm and pinholes, which collectively provide the panel with high light diffusivity and low gloss.