The method for manufacturing gravure transcription coating...

B - Operations – Transporting – 41 – M

Patent

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B41M 1/28 (2006.01) B05D 1/38 (2006.01) C23C 28/00 (2006.01)

Patent

CA 2338018

Disclosed is a method for manufacturing a continued gravure-transfer-coated metal plate by transferring a pattern over a continued metal plate wound in the form of a coil using a gravure transfer sheet, comprising the steps of: coating, over the metal plate, a primer coating material essentially consisting of 20 to 40% of a polyester resin having a number average molecular weight of 5,000 to 20,000 while exhibiting a glass transition temperature of 10 to 50°C, 4 to 15% of a melamine resin, 1 to 10% of a urethane resin, 0 . 3 to 3% of isocyanate, 15 to 35% of a pigment, 30 to 50% of a hydrocarbon and ester-based mixed solvent, and 1.5 to 3% of additives; heating and setting the primer coating layer in a hot-air-blowing dry oven, thereby forming a lower coating layer; thermally pressing a gravure transfer sheet, printed with a desired pattern on a base film layer thereof, onto the lower coating layer; releasing the base film of the gravure transfer sheet from the lower coating layer, thereby transferring the pattern, as a transfer coating layer, to the lower coating layer; coating, over the transfer coating layer, an upper coating material selected from the group consisting of a thermosetting fluorine resin, a thermosetting polyester resin, and an ultraviolet- thermosetting polyurethane-acryl-based resin; and heating and setting the upper coating layer or radiating ultraviolet rays onto the upper coating layer, thereby forming an upper coating layer. In accordance with the disclosed method, it is possible to manufacture, at a relatively high rate in a continuous line, transfer- coated steel plates exhibiting a superior workability, ultraviolet resistance, scratch resistance, and solvent resistance.

L'invention concerne un procédé de fabrication d'une plaque métallique continue revêtue par transfert de motif gravé. Ce procédé permet de transférer un motif sur une plaque métallique continue enroulée sous la forme d'une bobine au moyen d'une feuille de transfert de motif gravé. Il consiste à déposer une matière de revêtement primaire sur la plaque métallique, à chauffer et à durcir la couche de revêtement primaire dans un four sec à ventilateur à air chaud, d'où la formation d'une couche de revêtement inférieure, à presser par voie thermique une feuille de transfert de motif gravé, dont une couche de film de base comprend un motif imprimé souhaité, sur ladite couche de revêtement inférieure, à détacher le film de base de la feuille de transfert de motif gravé de la couche de revêtement inférieure, à appliquer, sur la couche de revêtement par transfert, une matière de revêtement supérieure choisie dans le groupe constitué par une résine de fluor thermodurcissable, une résine de polyester thermodurcissable et une résine thermodurcissable ultraviolette à base de polyuréthane-acryle, puis à chauffer et durcir la couche de revêtement supérieure ou à émettre des rayons ultraviolets sur ladite couche, d'où la formation d'une couche de revêtement supérieure.

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