Method for producing a veneered board
To provide a method which is intended for producing a veneered board with a simple structure that also makes it possible to improve the properties of the veneer in a simple manner, a method is proposed for producing a veneered board, wherein the veneered board comprises a veneer ( 4 ) having an upper face ( 6 ) and a lower face ( 5 ) and a carrier board ( 1 ) having an upper face ( 2 ) and a lower face ( 3 ), comprising the steps of providing a veneer ( 4 ), applying a binder ( 8 ) onto the upper face ( 2 ) of the carrier board ( 1 ) or the lower face ( 5 ) of the veneer ( 4 ), wherein a PU prepolymer is used as the binder, producing a stack of materials to be pressed comprising the carrier board ( 1 ) and the veneer ( 4 ) with the binder ( 8 ) arranged between the carrier board ( 1 ) and the veneer ( 4 ) and with the additive ( 7 ) arranged between the binder ( 8 ) and the veneer ( 4 ), pressing the stack of materials to be pressed in order to form a veneered board. The invention additionally relates to a veneered board.
1 . A method for producing a veneered board, comprising the steps of:
producing a stack of materials comprising: a carrier board having an upper surface and a lower surface, a binder layer having an upper surface and a lower surface wherein the lower surface is in direct contact with the upper surface of the carrier board, an additive material layer having an upper surface and a lower surface wherein the lower surface is in direct contact with the upper surface of the binder layer, an outer layer of veneer having an upper surface and a lower surface wherein the lower surface is in direct contact with the upper surface of the additive material layer, and an optional backing layer having an upper surface and a lower surface wherein the upper surface is in direct contact with the lower surface of the carrier board; and
pressing the stack of materials for a period of time at a pressure and a temperature causing: the binder and additive material to penetrate into the veneer with the additive material remaining on the surface of the binder, the binder to optionally penetrate the carrier board, and the binder to subsequently cure, forming the veneered board;
wherein the binder is a polyurethane prepolymer;
wherein the additive material is selected from the group consisting of dye, flame retardant, ink, UV stabilizer, antibacterial agents, antifungal agents, antialgal agents, hydrophobizing agents, bleaching agents, stain, and mixtures thereof, wherein the additive material is insoluble in the binder or is not homogeneously soluble in the binder; and
wherein the veneer is a sheet of real wood.
2 . The method according to claim 1 , wherein the polyurethane prepolymer is aliphatic and/or aromatic.
3 . The method according to claim 1 , wherein the additive material layer is provided as a particulate solid layer or as a liquid layer.
4 . The method according to claim 1 , wherein the binder layer is provided as a liquid layer.
5 . The method according to claim 1 , wherein the pressing temperature is between 100° C. and 240° C.
6 . The method according to claim 1 , wherein the pressing time is between 20 seconds and 60 seconds.
7 . The method according to claim 1 , wherein the pressing pressure is between 25 N/mm 2 and 50 N/mm 2 .
8 . The method according to claim 1 , wherein the stack of materials is produced by: applying the additive material to the lower surface of the veneer with the lower surface of the veneer facing upwards, forming the additive material layer; applying the binder to the lower surface of the additive material layer with the lower surface of the additive material layer facing upwards, forming the binder layer; contacting the lower surface of the binder layer with the upper surface of the carrier board; and optionally contacting the lower surface of the carrier board with the upper surface of the optional backing layer.
9 . The method according to claim 1 , wherein the stack of materials is produced by: applying the binder to the upper surface of the carrier board, forming the binder layer; applying the additive material to the upper surface of the binder layer, forming the additive material layer; contacting the lower surface of the veneer with the upper surface of the additive material layer; and optionally contacting the lower surface of the carrier board with the upper surface of the optional backing layer.
10 . A veneered board produced by the method of claim 1 , wherein the optional backing layer is not present.
11 . The veneered board according to claim 10 , wherein the carrier board is a wood composite board.
12 . A veneered board produced by the method of claim 1 , wherein the optional backing layer is present.