Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus

A technology of inkjet recording and recording media, applied in the direction of copying/marking methods, inks, applications, etc., can solve the problems of increasing ink viscosity, complicated production process, expensive raw materials, etc., and achieve excellent density, high printing quality, and high storage stability sexual effect

Inactive Publication Date: 2009-02-11
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it also has disadvantages such as its raw materials are very expensive, and the production process of this type of paper is very complicated
However, if the thickness is increased, a larger amount of expensive material is required
Thus, there is a problem that the cost required to prepare various media is increased
[0012] In addition, this document also lists urea as a solid humectant, but relative to dipeptide, the problem with urea is that its addition amount is comparable to that of peptide Also tends to slightly increase ink viscosity and may increase ink viscosity or cause colorant aggregation due to its decomposition when stored at high temperatures

Method used

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  • Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus
  • Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus
  • Ink for inkjet recording, ink set for inkjet recording, ink media set for inkjet recording, ink cartridge, inkjet recording method, and inkjet recording apparatus

Examples

Experimental program
Comparison scheme
Effect test

preparation Embodiment 1

[0282] -Preparation of surface-treated carbon black pigment dispersion-

[0283] In 3000mL2.5N sodium sulfate solution, add 90g CTAB with a surface area of ​​150m 2 / g, and the DBP oil absorption is 100ml / 100g of carbon black, and the mixture was stirred at 300rpm at 60°C for 10 hours, whereby the mixture was reacted and oxidized. The obtained reaction liquid was filtered, and carbon black obtained from the filtrate was neutralized by using sodium hydroxide, followed by ultrafiltration. The carbon black thus obtained was washed with water, then dried, and then dispersed in pure water so that the dispersion contained 20% by mass of carbon black.

preparation Embodiment 2

[0285] -Preparation of Surface-Treated Yellow Pigment Dispersion-

[0286] C.I. Pigment Yellow 128 was subjected to low-temperature plasma treatment to produce a pigment into which a carboxylic acid group was introduced as a yellow pigment. The pigment thus obtained was dispersed in ion-exchanged water, and the dispersion was subjected to desalination concentration by using an ultrafiltration membrane, whereby a yellow pigment dispersion having a pigment concentration of 15% was prepared.

preparation Embodiment 3

[0288] -Preparation of surface-treated magenta pigment dispersion-

[0289] A surface-treated magenta pigment was prepared in the same manner as in Preparation Example 2, provided that C.I. Pigment Red 122 was used instead of C.I. Pigment Yellow 128. Similar to the case of Preparation Example 2, the surface-treated pigment was easily dispersed in an aqueous medium when stirred, and the dispersion was desalted and concentrated by using an ultrafiltration membrane, thereby obtaining a magenta color with a pigment concentration of 15%. Pigment dispersions.

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Abstract

To provide an ink for inkjet recording containing water, water-soluble organic solvent, water-dispersible resin, fluorochemical surfactant or derivative thereof, and coloring agent containing pigment, wherein the ink has a surface tension of 20-35 mN/n and viscosity of 5 mPas or more at 25 DEG C, total amount of the water-dispersible resin and the coloring agent in the ink is 5-40% by mass, and mass ratio A/B of the water-dispersible resin A to the coloring agent B is 0.5-4, wherein the ink is applied for a recording medium for inkjet recording containing a support containing cellulose pulp, and one or more barrier layers disposed on at least one face of the support, and wherein the barrier layer contains 30% by mass or more of inorganic pigment having refractive index of 1.5 or more, excluding aluminum hydrate, and 10% by mass or more of inorganic pigment having a refractive index of less than 1.5.

Description

technical field [0001] The present invention relates to an ink for inkjet recording, an ink set for inkjet recording, an ink medium set for inkjet recording, an ink cartridge, an inkjet recording method, and an inkjet recording apparatus, which realize recording of high-quality images by an inkjet system, and Its image quality is close to that of commercial printing such as offset printing. Background technique [0002] Inkjet recording has been known as an excellent recording method, in which basically any recording medium (hereinafter, the recording medium may also be referred to as "recording medium", "inkjet paper", "recording medium for inkjet recording" or "recording medium") can be applied. media"), and it has been extensively researched and improved in recording apparatuses, recording methods, and recording media thereof. In this field, widely used inkjet recording inks are inks containing water as a main component and aqueous dyes. The reason for the huge demand f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00B41J2/01B41M5/00B41J2/175C09D11/322C09D11/326C09D11/328C09D11/38
Inventor 南场通彦松山彰彦诸星直哉大嶋亨小谷野正行后藤明彦永井希世文
Owner RICOH KK
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