CPC E04F 15/02038 (2013.01) [E04F 15/102 (2013.01); E04F 15/107 (2013.01); Y10T 428/24777 (2015.01)] | 18 Claims |
1. A floor board comprising a substrate having side edges and a decorative surface layer applied to said substrate, said substrate comprising MDF or HDF material at at least one of said side edges,
wherein said at least one side edge is treated with an impregnation agent;
said at least one side edge together with a side edge opposite thereto forming a first pair of opposite side edges of said substrate;
wherein said floor board further comprises a second pair of opposite side edges;
wherein at least second pair of opposite side edges comprises mechanical coupling parts allowing to couple said floor board at the respective side edges with a similar floor board by means of a downward motion such that, in a coupled condition, said floor board and said similar floor board become locked both in a direction perpendicular to a plane formed by the coupled floor boards, as well as in a direction perpendicular to the coupled side edges and in the plane of the coupled floor boards; and
wherein said MDF or HDF material has an average density of more than 750 kg per cubic meter and comprises a higher density region at least near said decorative surface layer, wherein said higher density region has a density of 900 kilograms per cubic meter or more.
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