WATER-BASED INK FOR SOFT PACKAGING

To provide a water-based ink for soft packaging capable of forming a coating film excellent in blocking resistance, adhesion to a substrate film, screen washing, and re-solubility.SOLUTION: A water-based ink for soft packaging comprises an aqueous resin (A) comprising an aqueous urethane resin (A1), and an alkalinity increasing agent (B). The aqueous urethane resin (A1) comprises an aqueous urethane resin (A11) whose 100% modulus when formed into a film is less than 8 MPa, and an aqueous urethane resin (A12) whose 100% modulus when formed into a film is more than or equal to 8 MPa. The 100% modulus when the aqueous urethane resin (A1) is formed into a film is less than 20 MPa. The glass transition temperature of the aqueous urethane resin (A1) is -30 to 130°C.SELECTED DRAWING: None 【課題】耐ブロッキング性、基材フィルムに対する密着性、版洗浄性及び再溶解性に優れる塗膜を形成できる軟包装用水性インキの提供。【解決手段】水性ウレタン樹脂（Ａ１）を含む水性樹脂（Ａ）と、アルカリ性付与剤（Ｂ）とを含有し、前記水性ウレタン樹脂（Ａ１）は、造膜したときの１００％モジュラスが８ＭＰａ未満である水性ウレタン樹脂（Ａ１１）と、造膜したときの１００％モジュラスが８ＭＰａ以上である水性ウレタン樹脂（Ａ１２）とを含み、前記水性ウレタン樹脂（Ａ１）を造膜したときの１００％モジュラスが２０ＭＰａ未満であり、かつ前記水性ウレタン樹脂（Ａ１）のガラス転移温度が－３０～１３０℃である、軟包装用水性インキ。【選択図】なし