Process for producing panels with footfall and ambient sound deadening
A panel has an upper side facing the room in the use position and a lower side facing the floor. The lower side is coated, at least in sections, with a bonding layer composed of polymer. The bonding layer has an uneven surface on the outer side facing away from the panel, and has been coated at least in sections with a damping layer composed of polymer. A covering composed of panels, a process and an apparatus for producing the panels are also described.
1. A process for producing panels which have sound deadening, comprising the steps of:
applying a bonding layer to a lower side of a panel;
shaping an outer side of the bonding layer, facing away from the panel, to an uneven surface comprising projections by virtue of a profiled tool in a press at temperatures between 100° C. and 190° C., said bonding layer having a density of more than 600 kg/m 3 ; and
applying a damping layer which is composed of polymer to the outer side of the bonding layer at least in sections such that the damping layer facing towards the lower side of the panel adopts the mirror image of the uneven surface and that the projections are embedded in the damping layer.
2. The process according to claim 1 , comprising composing the bonding layer from polymer which is applied to the lower side of the panel before the outer side is shaped.
3. The process according to claim 1 , comprising applying the bonding layer and the damping layer by means of at least one of rolling, knife-coating, casting, spreading and spraying.
4. The process according to claim 1 , comprising applying at least one of the polymers of the bonding layer and of the damping layer in the liquid state.
5. The process according to claim 1 , further comprising applying at least one of the bonding layer and the damping layer at temperatures up to 190° C.
6. The process of claim 5 , wherein said applying step comprises applying at least one of the bonding layer and damping layer at temperatures up to 150° C.
7. The process of claim 5 , wherein said applying step comprises applying at least one of the bonding layer and damping layer at temperatures up to 100° C.
8. The process according to claim 1 , further comprising cooling at least one of the bonding layer and the damping layer after application.
9. The process according to claim 1 , further comprising shaping the outer side of the bonding layer to an uneven surface with using one of a profiled mould, a profiled roller and a profiled press platen.
10. The process according to claim 1 , further comprising smoothing the damping layer after the application.
11. A process for producing panels which have sound deadening, comprising the steps of:
at the manufacture stage, applying a bonding layer to a lower side of a panel and shaping an outer side of the bonding layer, facing away from the panel, with a profiled tool in a press at a temperature between 100° C. and 190° C., said bonding layer having a density of more than 600 kg/m 3 , to produce an uneven surface comprising projections; and
in a use position, applying a damping layer which is composed of polymer at least in sections to the outer side of the bonding layer such that the damping layer facing towards the lower side of the panel adopts the mirror image of the uneven surface, and that the projections are embedded in the damping layer.