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Water-based ink composition and method of discharging liquid droplet

A water-based ink and composition technology, applied in ink, inking device, printing and other directions, can solve the problem of continuous stability and cannot exert sufficient effect, and achieve the effect of not easy pigment sedimentation and excellent continuous printing stability.

Active Publication Date: 2018-01-05
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] However, even if these ink compositions are used, they cannot exert a sufficient effect on the continuous stability problem caused by the alignment deterioration that occurs in the above-mentioned new heads.

Method used

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  • Water-based ink composition and method of discharging liquid droplet
  • Water-based ink composition and method of discharging liquid droplet
  • Water-based ink composition and method of discharging liquid droplet

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Embodiment Construction

[0063] Next, several embodiments of the present invention will be described. The embodiment described below is for explaining an example of the present invention. The present invention is not limited to the following embodiments, and includes various modifications that can be implemented within a range that does not change the gist of the present invention. In addition, not all the configurations described below are essential configurations of the present invention.

[0064] In this specification, "under a high-temperature environment" refers to an environment at a service temperature such as summer, and specifically refers to an environment of about 30°C to 50°C.

[0065] In this specification, "yield value" refers to the minimum stress value required to make the ink flow, and refers to the Casso yield value calculated by Casson-Plot.

[0066] 1. Water-based ink composition

[0067] The water-based ink composition according to this embodiment includes pigments and water, a...

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PUM

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Abstract

Provided is a water-based ink composition, which exhibits excellent continuous lettering stability even at a high temperature environment. The water-based ink composition, including a pigment and water, is characterized in that the viscosity at 20 DEG C is in a range of 2 mPa*s to 7 mPa*s, and a yield value at 20 DEG C is less than 0.2 mPa, and the yield value at 20 DEG C when 25% of the water evaporates is less than 0.8 mPa.

Description

technical field [0001] The present invention relates to a water-based ink composition and a droplet ejection method. Background technique [0002] An inkjet recording device as an example of a liquid ejecting device includes a head having a nozzle hole for ejecting ink, a drive unit (such as a piezoelectric vibrator or a heating element) for ejecting ink from the nozzle hole, and a control unit for controlling the drive unit based on data. . Ink is supplied to the nozzle hole through, for example, an ink cartridge, an ink supply chamber that receives ink from the ink cartridge, and an ink supply passage from the ink supply chamber to the nozzle hole. Usually, ink cartridges are replaceable. [0003] In recent years, new heads have been developed that can achieve high speed and high image quality by achieving miniaturization and compactness and increasing the array density of nozzle holes compared to conventional ones (for example, refer to Patent Document 1). [0004] In ...

Claims

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Application Information

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IPC IPC(8): C09D11/037C09D11/03B41J2/14
CPCC07D221/18C09D11/322B41J2/04B41J2/135B41J2202/01C09D11/326C09D11/38
Inventor 水泷雄介中野智仁伊藤涉武藤敦史大胁宽成
Owner SEIKO EPSON CORP
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