CPC E04F 15/02038 (2013.01) [E04F 15/102 (2013.01); E04F 15/107 (2013.01); Y10T 428/24777 (2015.01)] | 20 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 a coating 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 said floor board at said first pair of opposite side edges comprises mechanical coupling parts allowing to couple said floor board at the respective edges with a similar floor board 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 said edge and in said plane;
wherein said mechanical coupling parts are basically shaped as a tongue and a groove, wherein said groove is delimited by an upper groove lip and a lower groove lip, and wherein said tongue and groove are provided with additional locking elements for creating said locking in the direction perpendicular to said edge and in said plane; and
wherein in said coupled condition, said lower groove lip is arranged to deflect so as to be bent-out and push on said tongue to urge the coupled floor boards towards each other;
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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