초록 ▼

To reduce sound emission and at the same time improve stability, a multilayer board for acoustic insulation is proposed that includes, but is not limited to a core sheet arranged between a first and a second covering layer. At least one of the two covering layers is of a closed design. The core shee

To reduce sound emission and at the same time improve stability, a multilayer board for acoustic insulation is proposed that includes, but is not limited to a core sheet arranged between a first and a second covering layer. At least one of the two covering layers is of a closed design. The core sheet is firmly connected in a planar fashion to the covering layers. The core sheet comprises slits that extend within the core sheet in the direction of the core sheet thickness, which slits reduce the shear stiffness of the board and thus ensure an improved acoustic insulation effect. On both sides the core sheet comprises continuous edge zones, which extend parallel to the covering layers. An aircraft can have an interior lining formed by panels that comprise the multilayer boards in order to provide acoustic insulation.

대표청구항 ▼

1. A multilayer board for acoustic insulation for a panel lining an interior space, comprising a core sheet comprising:at least two core layers, with each core layer comprising:a honeycomb structure in which a plurality of cells extend in a direction of a core sheet thickness, the plurality of cells

1. A multilayer board for acoustic insulation for a panel lining an interior space, comprising a core sheet comprising:at least two core layers, with each core layer comprising:a honeycomb structure in which a plurality of cells extend in a direction of a core sheet thickness, the plurality of cells are separated by cell walls;slits in the cell walls that extend within the core layer along a longitudinal axis in the direction of the core sheet thickness, the slits arranged so as to divide the plurality of cells of the honeycomb structure into subpluralities of cells, and the slits extend to a respective substantially continuous edge region of the core layer, the substantially continuous edge region devoid of the slits; anda first covering layer;a second covering layer, andan intermediate layer,wherein at least one of the first covering layer and the second covering layer is a closed design,wherein the core sheet is arranged between the first covering layer and the second covering layer and firmly connected in a planar fashion to the first covering layer and the second covering layer, and the slits are open slits, andwherein the substantially continuous edge regions on both sides of the core sheet extend parallel to the first covering layer and the second covering layer, with the substantially continuous edge region of each core layer each firmly connected to a respective one of the first cover layer and the second cover layer, and the longitudinal axis of the slits is transverse to the first covering layer. 2. The multilayer board of claim 1, wherein the slits extend over approximately 70% of the core sheet thickness and the slits are arranged in a grid-like pattern. 3. The multilayer board of claim 1, wherein the at least two core layers are each interconnected in a planar fashion with the intermediate layer. 4. The multilayer board of claim 1, wherein the slits are offset relative to each other. 5. The multilayer board of claim 1, wherein the slits are aligned with each other. 6. The multilayer board of claim 3, wherein the core sheet comprises three core layers, wherein a middle core layer of the three core layers comprises substantially continuous open slits. 7. The multilayer board of claim 3, wherein the intermediate layer comprises an adhesive layer connecting two adjacent core layers. 8. The multilayer board of claim 3, wherein the intermediate layer is an attenuation tape that interconnects adjacent core layers by an adhesive effect and further comprises a material that has a mechanically absorbent effect. 9. The multilayer board of claim 3, wherein the intermediate layer is a prepreg. 10. The multilayer board of claim 6, wherein at sides facing the middle core layer, the other two core layers of the three core layers comprise the slits that are open on one side. 11. An aircraft, comprising: a fuselage; anda cabin formed within the fuselage, the cabin enclosed by an interior lining formed by panels in at least in some regions,wherein at least some of the panels of the interior lining of the cabin comprise a multilayer board for acoustic insulation, the multilayer board comprising:a core sheet having a first side and a second side, the core sheet comprising:at least two core layers, with each core layer comprising:a honeycomb structure in which a plurality of cells extend in a direction of a core sheet thickness, the plurality of cells are separated by cell walls, and slits are provided in the cell walls;slits that extend within the core layer along a longitudinal axis in the direction of the core sheet thickness, and the slits extend to a respective substantially continuous edge region of the core layer, the substantially continuous edge region devoid of the slits; anda first covering layer;a second covering layer, andan intermediate layerwherein at least one of the first covering layer and the second covering layer is a closed design and the slits are open slits,wherein the core sheet is arranged between the first covering layer and the second covering layer and firmly connected in a planar fashion to the first covering layer and the second covering layer, andwherein the substantially continuous edge regions on both the first side and the second side of the core sheet extend parallel to the first covering layer and the second covering layer, with the substantially continuous edge region of each core layer each firmly connected to a respective one of the first cover layer and the second cover layer, and the longitudinal axis of the slits is transverse to the first covering layer. 12. The aircraft of claim 11, wherein the slits extend over approximately 70% of the core sheet thickness. 13. The aircraft of claim 11, wherein the at least two core layers are interconnected in a planar fashion with the intermediate layer. 14. The aircraft of claim 13, wherein the core sheet comprises three core layers, wherein a middle core layer of the three core layers comprises substantially continuous open slits. 15. The aircraft of claim 14, wherein at sides facing the middle core layer, the other two core layers of the three core layers comprise the slits that are open on one side. 16. A method for producing a multilayer board for acoustic insulation for a panel lining an interior space, comprising: providing a core sheet with slits in a first core layer, the slits extend from one side along a longitudinal axis in a direction of a core layer thickness in such a manner that the first core layer comprises a continuous edge region devoid of slits that extends parallel to an area of the first core layer; arranging an intermediate layer on the side of the first core layer with open slits; andapplying a second core layer of the core sheet to the intermediate layer, the second core layer including slits that extend from one side of the second core layer along a longitudinal axis in a direction of a core layer thickness in such a manner that the second core layer has a continuous edge region devoid of slits that extends parallel to an area of the second core layer;arranging the core sheet between a first covering layer and a second covering layer, wherein at least one of the two covering layers is of a closed design; andconnecting the continuous edge region of the first core layer of the core sheet to the first covering layer and connecting the continuous edge region of the second core layer of the core sheet to the second covering layer, the core sheet firmly connected in a planar fashion to the first covering layer and the second covering layer,wherein the core sheet comprises a honeycomb structure in which a plurality of cells extending in the direction of the core layer thickness, the plurality of cells are separated from each other by cell walls, and the slits are provided in the cell walls, with the longitudinal axes of the slits extending transversely to the first covering layer, and the slits are open slits.