Rigid panel for making a floor covering
The disclosure relates to a multilayer panel for producing a floor covering, comprising a wear layer bonded to a back layer, said back layer being made up of at least a thermoplastic material, a plasticizer and fillers, the wear layer comprising a surface layer made up at least of PVC, said surface layer having a Shore D hardness greater than or equal to 60 and a Young's modulus greater than or equal to 1000 MPa.
1. A multilayer panel for making a floor covering comprising a wear layer bonded to a back layer,
wherein the back layer is derived from at least a thermoplastic material, a plasticizer and fillers,
wherein the wear layer comprises a surface layer derived from at least polyvinyl chloride (PVC), the surface layer having a Shore D hardness greater than or equal to 60 and a Young's modulus greater than or equal to 1000 MPa,
wherein the surface layer comprises impact absorbers;
wherein the impact absorbers are polymeric plasticizers; the index of refraction of the incorporated impact absorbers being comprised between 1.52 and 1.55 at 20° C., and
wherein the polymeric plasticizers are thermoplastic polyurethane (TPU) particles.
2. The panel according to claim 1 , wherein the surface layer has a Shore D hardness greater than or equal to 70.
3. The panel according to claim 1 , wherein the surface layer has a Young's modulus greater than or equal to 1500 MPa.
4. The panel according to claim 1 , wherein the surface layer is transparent.
5. The panel according to claim 1 , wherein the impact absorbers are present in an amount of less than 25%, by weight of the surface layer.
6. The panel according to claim 1 , wherein the impact absorbers are present in an amount of between 2.5% and 15%, by weight of the surface layer.
7. The panel according to claim 1 , wherein the impact absorbers are elastomeric polymeric particles.
8. The panel according to claim 1 , wherein a composition of the surface layer has a glass transition temperature (Tg) between 60° C. and 80° C.
9. The panel according to claim 8 , wherein the composition has a glass transition temperature (Tg) between 70° C. and 80° C.
10. The panel according to claim 1 , wherein a composition of the surface layer comprises at least one liquid plasticizer present in an amount of less than 10%, by weight of the surface layer.
11. The panel according to claim 10 , wherein the liquid plasticizer is present in an amount of less than or equal to 5% by weight of the surface layer.
12. The panel according to claim 1 , wherein the surface layer has a thickness of between 0.1 and 3 mm.
13. The panel according to claim 1 , wherein the surface layer has a thickness of between 0.3 and 2.5 mm.
14. The panel according to claim 1 , wherein the surface layer has a thickness of between 5 and 30% of the total thickness of the panel.
15. The panel according to claim 1 , wherein the back layer comprises a balancing layer derived from at least PVC.
16. The panel according to claim 15 , wherein the balancing layer has a Shore D hardness greater than or equal to 50 and a Young's modulus greater than or equal to 500 MPa.
17. The panel according to claim 15 , wherein the balancing layer is bonded to the wear layer.
18. The panel according to claim 17 , wherein the wear layer comprises a decorative film, the decorative film being in contact with the balancing layer.