Ink, ink cartridge, and inkjet recording method

摘要

An ink used for an inkjet recording method for discharging the ink from a recording head by an action of thermal energy contains self-dispersing carbon black, a polyurethane polymer having an acid value of 40 mg KOH/g or more, and an acryl polymer having an acid value of 100 mg KOH/g or more and 200 mg KOH/g or less.

主权项

1. A method for inhibiting burnt deposit on an inkjet recording head comprising a step of discharging an ink by an action of thermal energy from the recording head,
wherein the ink contains self-dispersing carbon black, a polyurethane polymer, and an acryl polymer, wherein the self-dispersing carbon black is at least one of a (i) carbon black in which a phthalic acid group is bonded to the surface of the carbon black, and (ii) a carbon black in which —C6H4—CONH—CH(PO3M2)2 group (M represents a hydrogen atom, an alkali metal, ammonium, or organic ammonium) is bonded to the surface of the carbon black, wherein an acid value of the polyurethane polymer is 40 mg KOH/g or more, and wherein an acid value of the acryl polymer is 100 mg KOH/g or more to 200 mg KOH/g or less.