Patent ID: 6627262
Filing Date: 2003-09-30
Classification: B05C,B05D,C23C,Y10T

Abstract:
Process for the continuous coating of at least one metal strip (1) with a fluid film (31) of crosslinkable polymer containing neither non-reactive solvent nor diluent, the said film (31) having a thickness of less than that of the metal strip (1), characterized in that:the metal strip (1) is made to run continuously over at least one back-up roll (3); a sheet (30) of the said crosslinkable polymer is formed, by forced flow at a temperature above the softening temperature of the crosslinkable polymer, on an applicator roll (20) having a deformable surface, the said crosslinkable polymer having a melt viscosity greater than 10 Pa.s under the conditions of formation of the said sheet, the temperature of formation of this sheet (30) being below the crosslinking onset temperature of the crosslinkable polymer and the said applicator roll (20) being driven, in rotation in the opposite direction to the direction in which the metal strip (1) runs at a point of contact between the applicator roll and the metal strip; the crosslinkable polymer film (31) is formed 25 on the applicator roll (20); the film (31) is transferred, thicknesswise, from the applicator roll onto the metal strip (1), by compressing this metal strip between the back-up roll (3) and the applicator roll (20), in order to obtain a coating of homogeneous thickness.