AQUEOUS INKJET INK SET AND METHOD FOR PRODUCING PRINTED MATTER

• Main Authors: NAKAO SAYAKO, IMANISHI HIDEKI, YAMAMOTO HIROMINE
• Format: Patent
• Language: English; Japanese
• Published: 17.03.2023
• 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 an ink set capable of forming a printed matter having excellent image quality and processability of a printed image especially for a low-permeability substrate.SOLUTION: There is provided an aqueous inkjet ink set which comprises a pretreatment liquid and an aqueous inkjet ink, wherein the pretreatment liquid contains a cationic water-soluble resin in which the absolute value of the surface charge amount is 5.5 meq/g or less, the amount of the cationic water-soluble resin is 1.0 mass% or more and 20 mass% or less based on the total amount of pretreatment liquid, the aqueous inkjet ink contains water, a coloring material and an anionic water-dispersible urethane resin in which the absolute value of the surface charge amount is 0.01 meq/g or more and 0.09 meq/g or less and the amount of the anionic water-dispersible urethane resin is 1.0 mass% or more and 15 mass% or less based on the total amount of the aqueous inkjet ink.SELECTED DRAWING: None 【課題】特に低浸透性基材に対して、印刷画像の画像品質及び加工性に優れる印刷物を形成可能なインクセットを提供する。【解決手段】前処理液と水性インクジェットインクとを含み、前記前処理液は、表面電荷量の絶対値が５．５ｍｅｑ／ｇ以下のカチオン性水溶性樹脂を含み、前記カチオン性水溶性樹脂は、前記前処理液全量に対して１．０質量％以上２０質量％以下であり、前記水性インクジェットインクは、水、色材、及び、表面電荷量の絶対値が０．０１ｍｅｑ／ｇ以上０．０９ｍｅｑ／ｇ以下のアニオン性水分散性ウレタン系樹脂を含み、前記アニオン性水分散性ウレタン系樹脂は、前記水性インクジェットインク全量に対して１．０質量％以上％１５質量％以下である、水性インクジェットインクセット。【選択図】なし