Printing ink composition for laminate

A printing ink composition for laminate, used for forming a printed layer on a film base material to be laminate processed,

• wherein the printing ink composition comprises a colorant, a solvent, and a binder composed of 80 to 98% by weight of a polyurethane resin, 0.5 to 5% by weight of a cellulose acetate alkylate resin and 1.0 to 15% by weight of a polyvinyl butyral resin, based on the total weight of the solids content,
• wherein the polyurethane resin is a polyurethane resin obtainable by reacting a reaction product obtainable by a reaction between a component (A) and a component (B) as indicated below, with a component (C) to produce an isocyanate group-containing prepolymer, and further reacting the prepolymer with a component (D), and a molar ratio of the hydroxyl group in the component (C) to the isocyanate group in the component (B) is within a range from 0.05 to 0.35:
• (A) a polyether diol compound having a number average molecular weight of 1,000 to 5,000, or a mixture of the polyether diol compound and a polyester diol compound having a number average molecular weight of 1,000 to 5,000;
• (B) a diisocyanate compound;
• (C) a hydroxyldialkylamine compound having a molecular weight of 50 to 300 and having one hydroxyl group in a molecule;
• and
• (D) a chain extending agent.