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Ink composition, ink set and image forming method

A technology of ink composition and imaging method, applied in the directions of ink, copy/marking method, heating method, etc., can solve the problems of deterioration of image formability, narrowing of nozzle holes, deviation of ink jetting direction, etc., to achieve high-resolution images, The effect of stable formation and suppression of image defects

Active Publication Date: 2012-08-22
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when thickened or solidified ink adheres to the nozzle head portion of the head, etc. and gradually deposits thereon, the nozzle hole may become narrow or may cause clogging, resulting in problems such as deviation of the ink ejection direction or non-ejection
When the adhered ink has been deposited, it is difficult to maintain its performance by employing a nozzle cap, a wiping unit, etc., and as a result, the image formability deteriorates over time

Method used

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  • Ink composition, ink set and image forming method
  • Ink composition, ink set and image forming method
  • Ink composition, ink set and image forming method

Examples

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preparation example Construction

[0068] Regarding the production method of self-dispersing pigments, according to physical treatment (for example, vacuum plasma treatment) or chemical treatment, it can be achieved by chemically bonding (for example, coordination, grafting, etc.) functional groups or molecules containing functional groups to the surface of pigments, etc. To obtain self-dispersing pigments. For example, self-dispersing pigments can be obtained by the method described in JP-A No. 8-3498.

[0069] In addition, commercially available self-dispersing pigments can also be used. Preferable examples thereof include MICROJET series (trade name) produced by Orient Chemical Industries Co., Ltd., and CAB-O-JET series (trade name) produced by Cabot Corporation.

[0070] The self-dispersing pigment is preferably a self-dispersing pigment having a carboxyl group (—COOH) on the surface of the pigment in consideration of improving ink cohesion and scratch resistance by reacting with an aggregating component whe...

Embodiment 1

[0362]

[0363] -Synthesis of water-insoluble polymer 1-

[0364] Add 88 g of methyl ethyl ketone into a 1000 mL three-necked flask equipped with a stirrer and a condenser, and heat to 72° C. in a nitrogen atmosphere. Add dropwise therein by dissolving 0.85g 2,2'-azobis(isobutyrate) dimethyl ester, 60g benzyl methacrylate, 10g methacrylic acid and 30g methyl methacrylate in 50g methyl ethyl ketone The resulting solution was added dropwise over 3 hours. After completion of the dropwise addition, the mixture was allowed to react for an additional 1 hour, and then a solution obtained by dissolving 0.40 g of dimethyl 2,2'-azobis(isobutyrate) in 2 g of methyl ethyl ketone was added thereto. The temperature was raised to 80°C, and the mixture was heated for 4 hours. The resulting reaction solution was precipitated twice in excess hexane, and then the separated resin was dried to obtain 95 g of a water-insoluble polymer 1 .

[0365] pass 1 H-NMR confirmed the composition of the...

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Abstract

An ink composition is disclosed which includes carbon black; at least one selected from the group consisting of a cyan pigment and a magenta pigment; at least one selected from the group consisting of polyvinyl pyrrolidone, polyvinyl alcohol, and polyethylene glycol, at a ratio of 0.0 1 % by mass or higher but lower than 1.00% by mass, relative to the total amount of the composition; water-insoluble or substantially water-insoluble resin particles, water-insoluble or substantially water-insoluble wax particles or any mixture thereof; and water. An ink set and an image forming method are also disclosed.

Description

technical field [0001] The present invention relates to ink compositions, ink sets and imaging methods. Background technique [0002] A recording method using an inkjet method can record high-quality images on various recording media by ejecting ink droplets from a plurality of nozzle holes provided at a head. Therefore, recording methods using the inkjet method are widely used. [0003] Pigments are widely used as colorants, which are one of the components contained in inks. [0004] Among pigments used in inks, carbon black is widely used as a black pigment. [0005] In addition, a technique of using other pigments other than carbon black (eg, cyan pigment) together with carbon black (hereinafter may be abbreviated as "CB") is also known. [0006] Specifically, for example, a pigment-dispersed aqueous recording liquid containing carbon black (CB), a pigment other than CB (e.g., a cyan pigment), and a urethane resin has been disclosed (for example, see Japanese Patent Ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/00C09D11/10C09D11/12B41J2/045B41J2/01B41M5/00C09D11/322C09D11/324
CPCC09D11/324C09D11/40C09D11/54F24F13/0245F24F13/06F24F2221/14B41J2/2107
Inventor 西塔亮大石康史
Owner FUJIFILM CORP
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