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Ink for inkjet recording and recording method therewith

An inkjet recording and ink technology, applied in the directions of reproduction/marking methods, inks, applications, etc., can solve the problems of drying performance degradation, rough surface, poor drying, etc., to achieve good wettability, good drying performance, high smoothness effect of gloss and high gloss levels

Active Publication Date: 2015-10-07
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, such aqueous inks generally have several disadvantages noted in terms of image quality compared to solvent-based inkjet inks
[0009] First, although the ink must dry immediately on a non-porous substrate since the ink does not have to penetrate the substrate substantially, water itself - which is the main solvent for water-based inks, and water-soluble organic solvents added as additives Tends to cause degradation of drying properties, resulting in poor drying and thus when printed articles are stacked or rolled, ink strike-through, so-called paper wicking, may occur
[0010] Also, although in many cases non-porous substrates are very glossy, and therefore there is a need for inks to achieve high gloss, so that after printing as a sense of consistency between printed and unprinted parts of the product as recorded Not damaged, but the particles are fused to form a coating film, unlike the case of solvent-based inks in which the resin is dissolved, and thus the surface is easily roughened and the gloss on it is easily damaged

Method used

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  • Ink for inkjet recording and recording method therewith
  • Ink for inkjet recording and recording method therewith
  • Ink for inkjet recording and recording method therewith

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0204] The pigment dispersion was used, mixed and stirred in the following formulation, and thereafter the resultant was subjected to filtration with a 0.2 μm polypropylene filter to produce an ink.

[0205] Surface-modified black dispersion (pigment solid content: 20%): 20 parts

[0206] Polycarbonate-based urethane resin emulsion A: 15 parts

[0207] Surfactant CH 3 (CH 2 ) 12 O(CH 2 CH 2 O) 3 CH 2 COOH: 2 parts

[0208] Propylene glycol (bp: 188°C): 20 parts

[0209] 3-methoxy-3-methyl-1-butanol (bp: 174°C): 5 parts

[0210] Diethylene glycol n-butyl ether (bp: 230°C): 10 parts

[0211] Disinfectant / Fungicide (Proxel LV manufactured by Avecia Inc.): 0.1 part

[0212] Ion-exchanged water: 27.9 parts

[0213] The inks produced as described above were evaluated by the following methods.

Embodiment 2

[0215] The pigment dispersion was used, mixed and stirred in the following formulation, and thereafter the resultant was subjected to filtration with a 0.2 μm polypropylene filter to produce an ink.

[0216] Surface-modified magenta pigment dispersion (pigment solid content: 20%): 20 parts

[0217] Polycarbonate-based urethane resin emulsion A: 15 parts

[0218] Surfactant CH 3 (CH 2 ) 12 O(CH 2 CH 2 O) 3 CH 2 COOH: 2 parts

[0219] 2,3-Butanediol (bp: 183°C): 20 parts

[0220] 3-methoxy-3-methyl-1-butanol (bp: 174°C): 5 parts

[0221] Ethylene glycol n-hexyl ether (bp: 208°C): 10 parts

[0222] Disinfectant / Fungicide (Proxel LV manufactured by Avecia Inc.): 0.1 part

[0223] Ion-exchanged water: 27.9 parts

[0224] The ink produced as above was evaluated in the same manner as in Example 1.

Embodiment 3

[0226] The pigment dispersion was used, mixed and stirred in the following formulation, and thereafter the resultant was subjected to filtration with a 0.2 μm polypropylene filter to produce an ink.

[0227] Surface-modified cyan pigment dispersion (pigment solid content: 20%): 15 parts

[0228] Polycarbonate-based urethane resin emulsion A: 10 parts

[0229] Surfactant CH 3 (CH 2 ) 12 O(CH 2 CH 2 O) 3 CH 2 COOH: 2 parts

[0230] Propylene glycol (bp: 188°C): 15 parts

[0231] 1,2-butanediol (bp: 194°C): 10 parts

[0232] 3-methoxy-3-methyl-1-butanol (bp: 174°C): 5 parts

[0233] Diethylene glycol n-butyl ether (bp: 230°C): 10 parts

[0234] Disinfectant / Fungicide (Proxel LV manufactured by Avecia Inc.): 0.1 part

[0235] Ion-exchanged water: 32.9 parts

[0236] The ink produced as above was evaluated in the same manner as in Example 1.

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Abstract

An ink for inkjet recording, including: water; a water-soluble organic solvent; a pigment; and resin particles, wherein 50% by mass or more of the water-soluble organic solvent is a water-soluble organic solvent having a boiling point of lower than 200°C, and the water-soluble organic solvent having a boiling point of lower than 200°C comprises 3-methoxy-3-methyl-1-butanol.

Description

technical field [0001] The present invention relates to an aqueous ink for inkjet recording which is optimal for recording on a nonporous substrate, and an inkjet recording method. Background technique [0002] Inkjet printers have been widely used as digital signal output devices in general households because of their advantages such as low noise, low running costs, and easy color printing. [0003] In recent years, inkjet technology has been increasingly used not only in such households but also in industrial applications such as displays, posters and bulletin boards. [0004] In such applications, since porous media are problematic in terms of durability such as light resistance, water resistance, and abrasion resistance, non-porous recording media such as plastic films have been used, and inks therefor have been developed. [0005] As such inks, for example, solvent-type inkjet inks using an organic solvent as a carrier and ultraviolet-curable inkjet inks including a po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/322C09D11/32B41J2/01B41M5/00
CPCC09D11/38C09D11/102C09D11/322B41J2/2107
Inventor 藤井一郎户田直博中川智裕长岛英文
Owner RICOH KK