Impact sound insulation two-layer panel
The invention relates to floor covering comprising two different impact sound attenuating layers 5, 6.
1. A floor covering panel comprising a supporting board and at least two further different layers which achieve an improvement of footstep sound absorption, wherein the first layer is a footstep sound absorption mat built from fibers, and the second layer is a footstep sound absorption layer made of thermoplastic material and is arranged underneath the first layer, and the second layer has at ambient temperature a marked relaxation behavior and is free of any inclusion of air.
2. A panel according to claim 1 , wherein the panel comprises a decor layer at the upper surface of the supporting board.
3. A panel according to claim 2 , wherein the supporting board is provided at its side with coupling elements.
4. A panel according to claim 2 , wherein the supporting board includes fibers that are shorter than the fibers of the mat.
5. A method for the production of a panel according to claim 2 comprising providing on one side of a supporting board at least one decor layer and on the other side a mat built from fibers and a layer of thermoplastic material underneath the mat, cutting the board into smaller boards, and providing the smaller boards with coupling elements on their sides.
6. A panel according to claim 2 , wherein the panel further comprises a counter acting layer underneath the supporting board.
7. A panel according to claim 2 , wherein the panel has a thickness of 3 to 15 mm.
8. A panel according to claim 2 , wherein the supporting board is made of HDF or MDF or chip board.
9. A panel according to claim 1 , wherein the bottom side of the first and second layers is provided with a paper layer.
10. A panel according to claim 9 , wherein the paper layer is impregnated with a synthetic resin.
11. A panel according to claim 1 , wherein the mat is made from wood fibers and glue.
12. A panel according to claim 1 , wherein the fibers include fibers with a length of up to 15 mm that are at least partially entangled with one another.
13. A panel according to claim 1 , wherein the mat has a thickness of 1-4 mm, and the second layer of thermoplastic material has a thickness of 0.1-1 mm.
14. A panel according to claim 1 , wherein the first and second layers are free of any inclusion of air.
15. A panel according to claim 1 , further comprising a paper layer between the supporting board and the mat.
16. A panel according to claim 1 , wherein the mat includes a rough surface attached to the supporting board and a smooth surface connected with the thermoplastic layer.