INK, INK CONTAINER, INKJET RECORDING DEVICE

• Main Authors: FUSHIMI HIROYUKI, UMEMURA KAZUHIKO
• Format: Patent
• Language: English; Japanese
• Published: 14.12.2017
• 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

PROBLEM TO BE SOLVED: To provide an ink improving image density, as well as improving discharge stability in a non-continuous discharge condition and storage stability.SOLUTION: An ink includes water, a coloring material, a first organic solvent and a second organic solvent. The first organic solvent is 1,2-hexane diol and included 10.0-40.0 mass% with regard to a total amount of the ink. The second organic solvent is at least one kind selected from 2-ethyl-1,3-hexane diol, 3-methyl-1,3-butanediol, 1,2-propane diol, 1,3-propane diol, 2-pyrrolidone and glycerin. A mass ratio (S2/S1) of the second organic solvent (S2) to the first organic solvent (S1) in the ink is S2/S1≤3/10.SELECTED DRAWING: None 【課題】画像濃度の向上と、不連続吐出条件における吐出安定性と、保存安定性とを向上させたインクを提案することを目的とする。【解決手段】水、色材、第一の有機溶剤、及び第二の有機溶剤を含むインクであって、前記第一の有機溶剤が、１，２−ヘキサンジオールであり且つ前記インク全量に対して１０．０質量％以上４０．０質量％以下含有され、前記第二の有機溶剤が、２−エチル−１，３−ヘキサンジオール、３−メチル−１，３−ブタンジオール、１，２−プロパンジオール、１，３−プロパンジオール、２−ピロリドン、及びグリセリンから選ばれる少なくとも１種であり、前記インク中における前記第一の有機溶剤（Ｓ１）に対する前記第二の有機溶剤（Ｓ２）の質量比（Ｓ２／Ｓ１）が、Ｓ２／Ｓ１≦３／１０であるインク。【選択図】なし