Treatment liquid for plastic film, primer liquid for printing, ink composition, and method for ink jet

Abstract

This invention provides a treatment liquid for an ink jet recording medium having a recording face of a plastic film, wherein the treatment liquid including at least a specific cyclic ester compound or a specific cyclic amide compound, a primer liquid for printing, and an ink composition. According to the present invention, a plastic recorded matter possessing excellent adhesion and waterfastness can be formed on a recording medium having a recording face of a plastic film.

1 . An ink-jet ink composition for formulation of an image having a recording face formed of a plastic film, wherein said ink composition comprises at least
 a cyclic ester compound of formula (1),   a thermoplastic resin,   a colorant, and   a main solvent,   
       said thermoplastic resin being dispersed in said ink composition: 
       wherein 
       
         
           
           
               
               
           
         
         R 1  represents a straight chain or branched chain C2 to C12 saturated hydrocarbon chain, and 
         X 1  represents —CH 2 — or —O—. 
       
     
     
         2 . The ink-jet ink composition according to  claim 1 , wherein in formula (1), R 1  represents a straight chain or branched chain C2 to C5 saturated hydrocarbon group. 
     
     
         3 . The ink jet ink composition according to  claim 1 , wherein said cyclic ester compound is selected from the group consisting of γ-butyrolactone, ε-caprolactone, propylene carbonate, and ethylene carbonate. 
     
     
         4 . The ink-jet ink composition according to  claim 1 , which further comprises a surfactant and wherein said surfactant is an acetylene glycol surfactant. 
     
     
         5 . The ink-jet ink composition according to  claim 1 , which further comprises an organic solvent having low surface tension, and wherein said organic solvent having low surface tension is diethylene glycol monobutyl ether or triethylene glycol monobutyl ether. 
     
     
         6 . A method for formulation of an image by ink jet recording, comprising ejecting and depositing droplets of an ink composition according to  claim 1  onto a recording medium having a recording face of a plastic film to perform printing. 
     
     
         7 . The method according  claim 6 , which further comprises a heating step of heating the ink composition deposited onto the recording face to form a resin film. 
     
     
         8 . The method according to  claim 6 , wherein the recording face is polyvinyl chloride film. 
     
     
         9 . A recorded matter printed by a method according to  claim 6 .