CPC B27F 1/02 (2013.01) [B27M 3/04 (2013.01); E04F 15/10 (2013.01)] | 20 Claims |
1. A panel comprising at least one layer comprising a thermoplastic material and a filler, the panel comprising a plurality of grooves in a rear side of the panel,
wherein said plurality of grooves comprise a first groove arrangement and a second groove arrangement,
wherein a plurality of first grooves has the first groove arrangement and at least one second groove has the second groove arrangement, the first groove arrangement having a same first groove depth and the second groove arrangement having a same second groove depth,
wherein the second groove depth is different from the first groove depth,
wherein the plurality of first grooves are spaced from one another along a longitudinal direction of the panel, and the plurality of first grooves is a cluster spaced from all of the at least one second groove along the longitudinal direction of the panel.
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