Thermal transfer sheet for printing printed matter with metallic luster

Abstract

A thermal transfer sheet for printing a printed matter having a metallic luster comprises of a substrate, a deposition anchor layer, a metal deposition layer and an adhesive layer. The deposition anchor layer, the metal deposition layer and the adhesive layer are formed in this order on one surface of the substrate. The deposition anchor layer contains a linear polymer having a glass transition temperature of not less than 130° C. by an amount of not less than 40 weight % of a total weight of the deposition anchor layer to thereby preventing the metal deposition layer from clouding due to high heat of a thermal head. The adhesive layer is formed of a mixture containing a wax and a thermoplastic resin and a composition ratio in amount of the thermoplastic resin to the wax is made smaller on a side to be contacted a transfer-receiving material than that on a side contacting the metal deposition layer along a direction of thickness of the adhesive layer to thereby provide a good appearance of the luster surface on the printed matter having an irregular surface.

1 . A method of manufacturing a thermal transfer sheet for printing a printed matter having a metallic luster, comprising the steps of: 
 preparing a substrate;    forming a deposition anchor layer, on one surface of said substrate, by applying a coating solution in which at least one linear polymer selected from polyimide group and a derivative thereof, having a glass transition temperature of not less than 130° C., is dissolved in a solvent selected from toluene, methylethylketone, ethyl acetate, isopropyl alcohol, and methanol, by a solid component amount of not less than 40 weight %;    forming a metal deposition layer on said deposition anchor layer; and    forming an adhesive layer on said metal deposition layer.    
     
     
         2 . A method of manufacturing a thermal transfer sheet according to  claim 1 , wherein said polyimide derivative is selected from polyamideimide and a modified product thereof.  
     
     
         3 . A method of manufacturing a thermal transfer sheet according to  claim 1 , wherein said linear polymer has a glass transition temperature of not less than 200° C.  
     
     
         4 . A method transfer sheet according to  claim 1 , wherein said deposition anchor layer has a coated amount in a range of 0.1 to 20 g/m 2.    
     
     
         5 . A thermal transfer sheet according to  claim 1 , wherein a peeling layer is further formed between said substrate and said deposition anchor layer.