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Ink composition for inkjet recording and inkjet recording method

An ink composition, inkjet recording technology, applied in the direction of copying/marking method, ink, application, etc., to achieve the effect of excellent granularity and excellent reliability

Inactive Publication Date: 2020-05-12
FUJIFILM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, if the surface tension of the ink is lowered, when the ink is ejected, a part of the ink is separated and adhered to a position deviated from the desired position, a satellite droplet, a mist droplet, etc. are likely to occur.

Method used

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  • Ink composition for inkjet recording and inkjet recording method
  • Ink composition for inkjet recording and inkjet recording method
  • Ink composition for inkjet recording and inkjet recording method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0328] Each component was mixed according to the following composition, and the ink was prepared. After liquid adjustment, coarse particles were removed using a 1 μm filter to prepare Ink 1 .

[0329] 〔composition〕

[0330] Black pigment dispersion: The pigment concentration becomes 4 parts

[0331] Organic solvent: diethylene glycol monohexyl ether (manufactured by Wako Pure Chemical Industries, Ltd.): 3 parts

[0332] Surfactant: Capstone FS-63 (manufactured by DuPont de Nemours, Inc.): 0.001 parts

[0333] Water: The total amount becomes 100 parts

Embodiment 2～ Embodiment 17、 comparative example 1～ comparative example 13

[0335] Ink 2 to Ink 15 and Ink 16 to Ink 27 were prepared in the same manner as Ink 1 except that the types and amounts of the organic solvent and surfactant were changed as shown in Table 4.

[0336]

[0337] (Ink ejection process)

[0338] A printer head manufactured by Ricoh Company, Ltd. (GELJET (registered trademark) GX5000) was prepared, and the ink prepared above was filled in a storage tank connected to the printer head.

[0339] Thereafter, the printer head was fixedly arranged so that the direction of the line head in which the nozzles were arranged was inclined at 75.7 degrees relative to the direction perpendicular to the moving direction of the stage. While moving the recording paper at a constant speed in the moving direction of the stage, the discharge conditions were set at an ink droplet volume of 2 pL, a discharge frequency of 25.5 khz, and a resolution of 1200 dpi (dot per inch)×1200 dpi. Finally, the ink was ejected in a line pattern to form an image hav...

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Abstract

Provided is an ink composition for inkjet recording which comprises a color material, water, an organic solvent which is represented by general formula (1) or general formula (2) and which has a ClogPvalue of 0.5 to 2.7, and a surfactant having a fluorine atom in the molecule, wherein the content of the organic solvent relative to the total mass of the composition is at least 1.0 mass% and less than 5.0 mass%, the content of the surfactant relative to the total mass of the composition is at least 0.001 mass% and less than 0.1 mass%, the composition has a surface tension of 25 mN / m to 35 mN / m,and the interfacial tension with a substrate having a surface energy of 68 mN / m is at least 25 mN / m and less than 60 mN / m when the composition is placed in contact with the substrate. Also provided is an inkjet recording method. (R1 is hydrogen or methyl; R2 is, for example, a hydrocarbon having 4 to 9 carbon atoms; n = 1 to 3; R3 is, for example, a hydrocarbon having 4 to 9 carbon atoms.

Description

technical field [0001] The present disclosure relates to an ink composition for inkjet recording and an inkjet recording method. Background technique [0002] The image recording method based on the inkjet method (ink inkjet recording method) does not require a printing plate, and only ejects ink to the image recording part to directly record an image on the recording substrate, so ink can be used efficiently and the running cost is low. Furthermore, the printing apparatus of the inkjet recording method is lower in cost than conventional printing machines, can also be miniaturized, and has less noise. The inkjet recording method has various advantages over other image recording methods. [0003] Conventionally, in a system without a treatment liquid, in order to improve the image quality of a recording object, it is effective to lower the surface tension of the ink to improve the wettability with respect to the substrate and to prevent the aggregation of the inks when they ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09D11/38B41J2/01B41M5/00
CPCB41J2/01B41M5/00C09D11/38C09D11/322
Inventor 本乡悠史
Owner FUJIFILM CORP
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