AQUEOUS INK INK CARTRIDGE AND INK JET RECORDING METHOD

The present invention relates to an aqueous ink which is for an ink jet and comprises a pigment and an aqueous organic solvent, wherein the pigment comprises a self-dispersing pigment in which carboxylic acid groups are directly attached to the surface of carbon black particles having a DBP oil adso...

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Bibliographische Detailangaben
Hauptverfasser:	FUJIMOTO KUNIAKI, TSUJIMURA MASASHI, TAKIGUCHI SHUHEI
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	ADHESIVES CHEMICAL PAINT OR INK REMOVERS CHEMISTRY COATING COMPOSITIONS, e.g. PAINTS, VARNISHES ORLACQUERS 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 SELECTIVE PRINTING MECHANISMS STAMPS TRANSPORTING TYPEWRITERS USE OF MATERIALS THEREFOR WOODSTAINS
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Beschreibung
Zusammenfassung:	The present invention relates to an aqueous ink which is for an ink jet and comprises a pigment and an aqueous organic solvent, wherein the pigment comprises a self-dispersing pigment in which carboxylic acid groups are directly attached to the surface of carbon black particles having a DBP oil adsorption of 120-150 mL/100g, inclusively, and has a surface charge of 0.20-0.25 mmol/g, inclusively, while the aqueous organic solvent comprises a first aqueous organic solvent which has a relative permittivity of 28.0 or greater at 25C and is included at 50.0-60.0 mass%, inclusively, with respect to the total amount of the aqueous organic solvent. 본 발명은 안료 및 수용성 유기 용제를 함유하는 잉크젯용 수성 잉크이다. 안료는 DBP 흡유량이 120mL/100g 이상 150mL/100g 이하인 카본 블랙의 입자 표면에 카르복실산 기가 직접 결합된 자기 분산 안료를 포함하고, 표면 전하량이 0.20mmol/g 이상 0.25mmol/g 이하이고, 수용성 유기 용제는 온도 25℃에서의 비유전율이 28.0 이상인 제1 수용성 유기 용제를 포함하고, 수용성 유기 용제의 총 함유량에 대한 제1 수용성 유기 용제의 함유량 비율이 50.0질량％ 이상 60.0질량％ 이하이다.