WATER-BASED INK-JET INK AND PRODUCTION METHOD FOR PRINTED MATTER

• Main Authors: SUZUKI NORIO, OKAMOTO MAYUKO, YODA JUN, SUZUKI YOSHITO, SHIROUCHI KAZUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 24.01.2019
• Subjects: ADHESIVES; CHEMICAL PAINT OR INK REMOVERS; CHEMISTRY; COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS; COLOUR PRINTING; CORRECTING FLUIDS; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; FILLING PASTES; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; INKS; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; PAINTS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; PERFORMING OPERATIONS; POLISHES; PRINTING; PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES; SELECTIVE PRINTING MECHANISMS; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS THEREFOR; WOODSTAINS

To provide a water-based ink-jet ink that gives excellent printed matter, which has excellent printing quality without white patches and is excellent in various coating film resistances, even when using a poorly absorbable base material, and is excellent in discharge stability from an inkjet nozzle and dryability during the printing, and a production method for printed matter using the water-based ink-jet ink.SOLUTION: The present invention provides a water-based ink-jet ink which comprises at least water, a pigment, a water-soluble organic solvent, and a binder resin, wherein the water-soluble organic solvent comprises at least a water-soluble organic solvent having a surface tension of 30-50 mN/m and a boiling point of 180-230°C at 1 atm, in an amount of 15-50 wt.% with respect to the whole water-based ink-jet ink and wherein the binder resin has an acid value of 5 mg-KOH/g or greater but less than 60 mg-KOH/g.SELECTED DRAWING: None 【課題】本発明の目的は、難吸収性基材を用いても、白抜けのない優れた印刷画質を有し、かつ種々の塗膜耐性に優れる印刷物を得ることができ、インクジェットノズルからの吐出安定性や、印刷時の乾燥性にも優れる水性インクジェットインキ、及び前記水性インクジェットインキを用いた印刷物の製造方法を提供することにある。【解決手段】少なくとも水、顔料、水溶性有機溶剤、バインダー樹脂を含有する水性インクジェットインキであって、前記水溶性有機溶剤が、少なくとも表面張力が３０〜５０ｍＮ／ｍであり、かつ１気圧下における沸点が１８０〜２３０℃である水溶性有機溶剤を、水性インクジェットインキ全量に対し１５〜５０重量％含み、前記バインダー樹脂の酸価が５ｍｇＫＯＨ／ｇ以上６０ｍｇＫＯＨ／ｇ未満であることを特徴とする、水性インクジェットインキである。【選択図】なし