US 12,421,740 B2
Building panel comprising mineral-based layer
Christoffer Nilsson, Helsingborg (SE)
Assigned to VÄLINGE INNOVATION AB, Viken (SE)
Filed by Välinge Innovation AB, Viken (SE)
Filed on Sep. 21, 2021, as Appl. No. 17/480,592.
Claims priority of application No. 20511028 (SE), filed on Sep. 23, 2020.
Prior Publication US 2022/0090391 A1, Mar. 24, 2022
Int. Cl. E04F 15/10 (2006.01); B32B 7/12 (2006.01); B32B 13/12 (2006.01); E04F 15/02 (2006.01)
CPC E04F 15/107 (2013.01) [B32B 7/12 (2013.01); B32B 13/12 (2013.01); E04F 15/02038 (2013.01); E04F 15/105 (2013.01); B32B 2250/03 (2013.01); B32B 2250/40 (2013.01); B32B 2307/558 (2013.01); B32B 2419/04 (2013.01); E04F 2201/0153 (2013.01); E04F 2201/023 (2013.01); E04F 2201/043 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A floor panel comprising a core, the floor panel further comprising an upper arrangement being attached to an upper side of the core and/or a lower arrangement being attached to a lower side of the core, wherein the core is mineral-based, wherein the mineral-based core comprises at least 20 wt % of a mineral material, and wherein at least one of the upper arrangement or the lower arrangement comprises at least one rigid layer, wherein said rigid layer comprises at least a thermoplastic polymer and at least one of an impact modifier or an acrylic processing aid,
wherein said at least one of the upper arrangement or the lower arrangement comprising at least one rigid layer further comprises a mineral-based attachment layer between the rigid layer and the core, wherein said rigid layer is directly or indirectly attached to said mineral-based attachment layer, and
wherein the thermoplastic polymer is present in an amount of 15-60 wt %.