Recording ink and manufacturing method thereof, ink cartridge, ink recorded matter, inkjet recording apparatus, and inkjet recording method

Abstract

A recording ink which has excellent storage stability, is improved in delivery stability especially during continuous delivery or after delivery stopping, and can give a high-quality image reduced in ink running. The recording ink comprises a colorant, surfactant, penetrant, and antifoaming agent. It contains coarse particles with a particle diameter of 0.5 µm or larger in an amount of 3.0 x 10<7> (per 5 µL), and the proportion of particles with a particle diameter of 1 to 5 µm, excluding 5 µm, in those coarse particles is up to 1% by number. Preferred embodiments include: one in which the colorant comprises a pigment which has at least one hydrophilic group and is water-dispersible or water-soluble in the absence of a dispersant; one in which the surfactant comprises at least one member selected among polyoxyethylene alkyl ether surfactants and polyoxyethylene alkyl ether acetate surfactants; one in which the penetrant comprises at least either of 2,2,4-trimethyl-1,3-pentanediol and 2-ethyl-1,3-hexanediol; and one in which the antifoaming agent is one selected among silicone antifoaming agents.

Description

technical field [0001] The present invention relates to a recording ink suitable for recording in an inkjet recording method, a method for preparing the same, an ink cartridge using the recording ink, an ink-recorded object, an inkjet recording device, and an inkjet recording method. Background technique [0002] Ink-jet printers employing the ink-jet recording method have been rapidly popularized in recent years because they can print on plain paper, are easy to color, are compact and inexpensive, and have low operating costs. In general, the properties required for recording inks that can be used in inkjet recording methods include color tone, image density, bleeding (bleeding) and the like in order to achieve high image quality, dissolution stability of colorants for reliability, Storage stability, etc., water resistance, light resistance, etc. to ensure the storage stability of recorded images, and ink quick-drying properties to achieve high speed, etc., so far, various ...

AI Technical Summary

Problems solved by technology

However, although this defoamer generally has a foam suppressing effect and a foam breaking effect, the aforementioned defoaming agent must be uniformly dispersed in the ink liquid in order to improve the aforementioned foam suppressing effect. On the other hand, in order to improve the aforementioned foam breaking effect, the aforementioned The antifoaming agent exists near the surface of the ink liquid. In the case of using the antifoaming agent, it is not easy to have both the aforementioned foam suppressing effect and the aforementioned foam breaking effect. By adding insoluble particles that produce the aforementioned foam breaking effect, there is a reliable problem of reduced sex

[0011] Therefore, there has not been provided an inkjet recording method suitable for use, good storage stability, ejection stability, especially improved ejection stability during continuous ejection or after ejection stop, and high inkjet ink with less bleeding. Image quality recording ink and related technology

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