US 11,725,398 B2
Thermoplastic-based building panel comprising a balancing layer
Per Josefsson, Ramlösa (SE); Christoffer Nilsson, Helsingborg (SE); and Filip Sköld, Malmö (SE)
Assigned to CERALOC INNOVATION AB, Viken (SE)
Filed by Ceraloc Innovation AB, Viken (SE)
Filed on Dec. 22, 2020, as Appl. No. 17/130,783.
Claims priority of application No. 1951558-4 (SE), filed on Dec. 27, 2019; and application No. 1951559-2 (SE), filed on Dec. 27, 2019.
Prior Publication US 2021/0198901 A1, Jul. 1, 2021
Int. Cl. E04B 2/00 (2006.01); E04F 15/10 (2006.01); B32B 27/20 (2006.01); B32B 27/08 (2006.01); B32B 3/06 (2006.01); B32B 27/30 (2006.01); B32B 27/22 (2006.01); E04F 15/02 (2006.01)
CPC E04F 15/107 (2013.01) [B32B 3/06 (2013.01); B32B 27/08 (2013.01); B32B 27/20 (2013.01); B32B 27/22 (2013.01); B32B 27/304 (2013.01); E04F 15/02038 (2013.01); E04F 15/105 (2013.01); B32B 2250/03 (2013.01); B32B 2250/246 (2013.01); B32B 2264/104 (2013.01); B32B 2307/4026 (2013.01); B32B 2419/04 (2013.01); E04F 2201/0146 (2013.01); E04F 2201/0153 (2013.01); E04F 2201/023 (2013.01); E04F 2201/042 (2013.01); E04F 2201/0535 (2013.01); E04F 2203/08 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A thermoplastic-based building panel having a reduced weight and/or a reduced material content, comprising:
an upper layer arrangement comprising thermoplastic polymer and, optionally, a filler, the upper layer arrangement comprising at least one upper layer,
a lower layer arrangement comprising thermoplastic polymer and, optionally, a filler, the lower layer arrangement comprising at least one lower layer, and
a balancing layer comprising thermoplastic polymer and, optionally, a filler, the balancing layer being provided between said lower layer arrangement and said upper layer arrangement,
wherein the building panel further comprises a groove arrangement comprising at least one groove, a groove depth of the at least one groove being larger than 20% of a thickness of the building panel,
wherein the groove arrangement is provided in the lower layer arrangement, wherein at least one of the at least one groove is provided entirely below the balancing layer, and
wherein the groove arrangement is post-formed after forming the panel per se by removing material from a bottom layer of the building panel.