US 12,276,117 B2
Board and floor panel based on such board
Benjamin Clement, Waregem (BE); and Sam Ledegen, Ghent (BE)
Assigned to UNILIN BV, Wielsbeke (BE)
Appl. No. 17/625,253
Filed by FLOORING INDUSTRIES LIMITED, SARL, Bertrange (LU)
PCT Filed Jun. 24, 2020, PCT No. PCT/IB2020/055967
§ 371(c)(1), (2) Date Jan. 6, 2022,
PCT Pub. No. WO2021/009584, PCT Pub. Date Jan. 21, 2021.
Claims priority of application No. 2019/5461 (BE), filed on Jul. 16, 2019; and application No. 2019/5881 (BE), filed on Dec. 10, 2019.
Prior Publication US 2022/0243483 A1, Aug. 4, 2022
Int. Cl. E04F 15/02 (2006.01); B32B 13/02 (2006.01); B32B 13/10 (2006.01); B32B 19/02 (2006.01); B32B 19/04 (2006.01); B32B 21/02 (2006.01); E04F 15/10 (2006.01)
CPC E04F 15/02038 (2013.01) [B32B 13/02 (2013.01); B32B 13/10 (2013.01); B32B 19/02 (2013.01); B32B 19/042 (2013.01); B32B 21/02 (2013.01); E04F 15/102 (2013.01); E04F 15/107 (2013.01); B32B 2250/02 (2013.01); B32B 2260/025 (2013.01); B32B 2260/046 (2013.01); B32B 2471/00 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A sheet material with at least first and second layers of material, wherein the first layer of material forms more than half of the thickness of the sheet material and is mainly built up from wood particles glued by means of a first binder and pressed,
wherein the first binder is thermosetting,
wherein the wood particles of the first layer of material are wood fibres;
wherein the second layer of material is present on a first surface of the sheet material and is mainly built up from particulate particles glued by means of a second binder and pressed,
wherein the second binder is thermoplastic or elastomeric;
wherein the particulate particles of the second layer of material are or comprise wood chips or wood fibres;
wherein the sheet material has a density profile over the thickness of the sheet material, wherein the density profile has a first peak density formed in the material of the first layer of material, and a second peak density formed in the material of the second layer of material;
wherein a decorative top layer is arranged on the second layer of material;
wherein the decorative top layer comprises a printed paper sheet and a transparent or translucent layer applied thereon;
wherein the transparent or translucent layer comprises synthetic material that is a thermally cured acrylate resin based on a multifunctional acrylate monomer and an acrylate oligomer;
wherein a polyurethane coating is applied on at least one surface of the printed paper, the at least one surface of the printed paper sheet facing the transparent or translucent layer.