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Liquid droplet discharge apparatus and ink set

An ink and droplet technology, applied in the direction of ink, printing, copying/marking methods, etc., can solve the problems of agglomerates dripping on the recording medium and the decrease of ink ejection stability.

Active Publication Date: 2013-01-02
SEIKO EPSON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In particular, when cleaning the nozzle surface with a wiper provided for cleaning the nozzle surface, the nozzle hole may be clogged with pigment aggregates, resulting in reduced ink ejection stability.
In addition, there may be a problem that the agglomerated matter of the pigment adhering to the nozzle surface drops onto the recording medium.

Method used

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  • Liquid droplet discharge apparatus and ink set
  • Liquid droplet discharge apparatus and ink set
  • Liquid droplet discharge apparatus and ink set

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0181] 3.1. Preparation of ink

[0182] 3.1.1. Preparation of pigment ink

[0183] (1) Preparation of Pigment Dispersion

[0184] First, 20 parts by mass of black pigment as a colorant and 80 parts by mass of ion-exchanged water were added, and after mixing and stirring, a sand mixer (manufactured by Yaskawa Seisakusho Co., Ltd.) and zirconia microbeads (diameter 1.5 mm) were used for 6 hours. Decentralized processing. Then, by separating the zirconia beads with a separator, a pigment dispersion liquid was obtained.

[0185] (2) Preparation of pigment ink

[0186] Next, each component was mixed and stirred in the compounding quantity shown in Table 1, and pressure filtration was performed with the membrane filter with a pore diameter of 10 micrometers, and the black pigment ink (K) was obtained. In addition, the unit described in Table 1 is mass %.

[0187] 3.1.2. Preparation of dye ink

[0188] The components were mixed and stirred in the amounts shown in Table 1, and s...

Embodiment 2

[0228] In Example 2, the arrangement of the nozzle row for ejecting ink and the wiping direction of the nozzle surface are as follows: Image 6 As shown, except for this, it carried out similarly to Example 1. Image 6 It is a schematic diagram showing the nozzle surface of the ink jet head used in Example 2 and Comparative Example 5 (described later).

Embodiment 3

[0230] In Example 3, the arrangement of the nozzle row for ejecting ink and the wiping direction of the nozzle surface are as follows: Figure 7 As shown, except for this, it carried out similarly to Example 1. Figure 7 It is a schematic diagram showing the nozzle surface of the ink jet head used in Example 3 and Comparative Example 6 (described later).

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Abstract

A liquid droplet discharge apparatus includes a head member. The head member is provided with a nozzle surface, a plurality of nozzle arrays including a first nozzle array and a second nozzle array is arranged on the nozzle surface, the nozzle array includes a plurality of nozzle holes which are arranged in a predetermined pattern, the first nozzle array discharges a pigment ink which contains water and a pigment, the second nozzle array discharges a dye ink which contains water and a dye, and the relationship between the conductivity [E 1 (mS / cm)] of the pigment ink and the conductivity [E 2 (mS / cm)] of the dye ink is expressed by the formula 0<(E 2 -E 1 ) 3.

Description

technical field [0001] The present invention relates to a droplet ejection device and an ink set. Background technique [0002] Conventionally, inks containing pigments or dyes as colorants have been known. Pigment inks containing a pigment as a colorant are particularly suitable for recording characters and the like because they have little bleeding and are excellent in water resistance and light resistance. In addition, dye inks containing dyes as colorants are particularly preferred for use in recording images and the like because of their good glossiness and color development properties, and bright colors. [0003] When a pigment ink and a dye ink having the above-mentioned properties are used in combination, the recording quality of both characters and images recorded on the recording medium becomes excellent. For this reason, in recent years, droplet ejection devices including both pigment inks and dye inks have been widely used. [0004] However, when an image is r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B41J2/01C09D11/02B41J2/045B41J2/055B41J2/135B41J2/14B41J2/145B41J2/165B41M5/00C09D11/00C09D11/52
CPCB41J2/1433C09D11/40B41J2/17
Inventor 有贺友洋石原大辅
Owner SEIKO EPSON CORP