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

An ink and recording technology, which is applied in the fields of inkjet recording and ink cartridges, can solve the problems that it is not easy to have both the anti-foaming effect and the aforementioned foam-breaking effect, the reliability is reduced, and the storage stability is good.

Inactive Publication Date: 2005-08-24
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0181] -Preparation of black ink-

[0182] 50% by mass of black pigment (manufactured by Toyo Ink Co., Ltd., "KM-9036", average particle diameter: 102nm), 10% by mass of glycerin, 15% by mass of 1,3-butanediol, 2-ethanediol as the aforementioned self-dispersing pigment, Base-1,3-hexanediol 2 mass%, 2-pyrrolidone 2 mass%, surfactant (C 13 h 27 O(C 2 h 4 O) 7 H) Mix 1% by mass, self-emulsifying silicone defoamer (manufactured by Shin-Etsu Chemical Co., Ltd.), 0.1% by mass of "KS508", and ion-exchanged water (the balance), stir well at room temperature, and use the average pore size 1.2 μm membrane filter for filtration. The black ink of Example 1 was prepared from the above.

Embodiment 2

[0184] -Preparation of yellow ink-

[0185] After mixing 30% by mass of C.I. Pigment Yellow 97, 15% by mass of polyoxyethylene oleyl ether ammonium sulfate, 30% by mass of ethylene glycol, and pure water (the balance) as the aforementioned pigment, it was dispersed using a wet sand mixer, Coarse particles were removed by centrifugation (800 rpm, 15 minutes) to prepare a yellow pigment dispersion (1) with an average particle diameter of 120 nm.

[0186] Then, 20% by mass of the aforementioned yellow pigment dispersion (1), 5% by mass of glycerin, 15% by mass of diethylene glycol, 2% by mass of 2,2,4-trimethyl-1,3-pentanediol, and a surface active agent (C 13 h 27 O(C 2 h 4 O) 5 CH 2 COOH) sodium salt 1% by mass, silicone antifoaming agent (manufactured by Shin-Etsu Chemical Co., Ltd., "KS 531" 0.1% by mass), and ion-exchanged water (the rest) were mixed, stirred well at room temperature, and the average pore diameter was used. The membrane filter of 1.2 μm is filtered.Th...

Embodiment 3

[0188] -Preparation of magenta ink-

[0189] Mix 30% by mass of C.I. Pigment Red 122 as the aforementioned pigment, 15% by mass of polyoxyethylene oleyl ammonium sulfate, 30% by mass of glycerin, and pure water (the balance), and disperse using a triple roll mill. Coarse particles were removed by separation treatment (800 rpm, 15 minutes) to prepare a magenta pigment dispersion (2) having an average particle diameter of the pigment of 150 nm.

[0190] Then, 25% by mass of the aforementioned magenta pigment dispersion (2), 5% by mass of glycerin, 15% by mass of diethylene glycol, 2% by mass of 2,2,4-trimethyl-1,3-pentanediol, and a surface active agent (C 13 h 27 O(C 2 h 4 O) 5 CH 2 COOH) sodium salt 1% by mass, silicone defoamer (manufactured by Shin-Etsu Chemical Co., Ltd., "KS 531" 0.1% by mass), and ion-exchanged water (the rest) were mixed, stirred well at room temperature, and used with an average pore diameter of 1.2 The membrane filter of μm is filtered.The magen...

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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 ...

Claims

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Application Information

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IPC IPC(8): C09D11/38B41J2/01B41M5/00C09D11/00C09D11/32C09D11/322C09D11/326C09D11/328
CPCC09D11/32C09D11/40C09D11/30C09D11/322B41J2/01B41M5/00C09D11/38
Inventor 小西昭子
Owner RICOH KK
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