INKJET RECORDING METHOD AND INKJET RECORDING DEVICE

• Main Authors: TOMINAGA YASUSUKE, YOSHITOKU DAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 20.10.2023
• 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 a recording method for forming a high definition image without bleeding of dots.SOLUTION: There is provided an inkjet recording method which comprises an ink application step, a drying step and an ultraviolet ray irradiation step, wherein the ink is ultraviolet curing ink containing a water-soluble polymerizable compound, the time when the ink lands on a recording medium is 0 milliseconds, the shorter time of the time until a slope in a relationship between volume and time of ink which has landed on the recording medium continuously becomes -0.01 μL/millisecond or more and the time until 1000 milliseconds is defined as T, a slope of a first approximate straight line calculated from a change over time of viscosity of the ink which has landed on the surface from 0 millisecond to 0.1 T is 2.0×10-2 mPa s/s or less, a slope of a second approximate straight line calculated from the change over time of the viscosity of the ink which has landed on the recording medium from 0.9 T to the T is 1.4 mPa s/s or more and an intersection of the first and second approximate lines is 400 milliseconds or less.SELECTED DRAWING: Figure 1 【課題】ドットの滲みのない高精細な画像を形成する記録方法を提供する。【解決手段】インク付与工程と、乾燥工程と、紫外線照射工程とを有し、インクは水溶性重合性化合物含む紫外線硬化インクであり、インクが記録媒体に着弾した時間を０ミリ秒、着弾したインクの体積と時間の関係における傾きが連続して－０．０１μＬ／ミリ秒以上になるまでの時間、及び１０００ミリ秒までの時間のいずれか短い方の時間をＴとし、０ミリ秒から０．１Ｔまでの着弾したインクの粘度の経時変化から算出される第一の近似直線の傾きが２．０×１０－２ｍＰａ・ｓ／ｓ以下であり、０．９Ｔから該Ｔまでの着弾したインクの粘度の経時変化から算出され第二の近似直線の傾きが１．４ｍＰａ・ｓ／ｓ以上であり、前記第一の近似直線と第二の近似直線の交点が４００ミリ秒以下であることを特徴とするインクジェット記録方法である。【選択図】 図１