Resin film laminated metal sheet for can and method for fabricating the same

Abstract

The present invention relates to a resin film laminated metal sheet for can, in which both faces of the metal sheet have resin film laminated layers, and a surface free energy γs of a face of the resin film is 10 dyn/cm or more to less than 30 dyn/cm, the face becoming an inside of can after can-making and being contacted with stuffed food contents. As the resin film, applicable is a polypropylene film or a propylene ethylene based random copolymer film of polypropylene being a main component. Further, a resin film of polyester being a main component and containing a wax component of 0.1 to 2.0% is used in a resin film to be an inside of can after can-making. The resin film laminated metal sheet for can according to the invention has excellent formability and adhesion while can-making and superior taking-out property of stuffed food contents.

What is claimed is:  
     
         1 . A method for fabricating a resin film laminated metal sheet for a can, comprising the step of laminating a resin film composed of polypropylene film or propylene ethylene based random copolymer film of polypropylene being a main component on the face of the metal sheet for the interior of the can, wherein the temperature of the metal sheet after passing laminating rolls ranges from the melting point of the resin film to 182° C.  
     
     
         2 . The method according to  claim 1 , wherein a time when the metal sheet is cooled after passing the laminating rolls is 1 to 5 seconds, and the temperature of the metal sheet at starting of cooling is (the melting point of the resin film −30)° C. or higher.  
     
     
         3 . The method according to  claim 1 , wherein the face of the metal sheet for the exterior of the can is laminated with a resin film of polyester being a main component.  
     
     
         4 . The method according to  claim 2 , wherein the face of the metal sheet for the exterior of the can is laminated with a resin film of polyester being a main component.  
     
     
         5 . A method for fabricating a resin film laminated metal sheet for can, comprising the step of laminating a resin film of polyester being a main component on the face of the metal sheet for the interior of the can, wherein the temperature of the face of the resin film to contact the metal sheet is maintained above the melting point of the resin film between 1 and 20 msec.