METHOD FOR MANUFACTURING DISPERSION AND INK USING DISPERSION OBTAINED THEREBY

Abstract

A method for manufacturing a dispersion, includes a step of forming a reaction product by allowing at least two types of liquids to react with each other, the dispersion including a dispersion medium and particles formed from the reaction product dispersed therein. In the method described above, the at least two types of liquids are ejected from independently provided respective nozzles so that traveling directions of the liquids ejected therefrom intersect with each other at an angle of 120° or less and so that the liquids then flow in an integrated manner, whereby the reaction product is generated.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic view showing an entire liquid mixing device system using a liquid mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 2 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 3 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 4 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 5 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 6 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 7 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 8 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 9 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 10 is a schematic view showing a part of a mixing device which can be applied to a method for manufacturing a dispersion, according to the present invention.

FIG. 11 is a graph showing 20° of gloss of a square pattern printed using a pigment ink of the present invention and that of square pattern printed using a general pulverized pigment ink.

FIG. 12 is a graph showing 60° of gloss of a square pattern printed using a pigment ink of the present invention and that of a square pattern printed using a general pulverized pigment ink.

Claims

1. A method for manufacturing a dispersion, comprising: forming a reaction product by allowing at least two types of liquids to react with each other, the dispersion including a dispersion medium and particles dispersed therein, which are formed from the reaction product, wherein said at least two types of liquids are ejected from independently provided respective nozzles so that traveling directions of the liquids intersect with each other at an angle of 120° or less and so that the liquids then flow in an integrated manner, whereby the reaction product is formed.

2. The method for manufacturing a dispersion, according to claim 1, wherein the flow rates of the ejected liquids are each set so that L/S is in the range of 26 to 360, in which a nozzle opening area and a flow rate of an ejected liquid are represented by S (mm2) and L (ml/min), respectively.

3. The method for manufacturing a dispersion, according to claim 1, wherein the reaction is a reprecipitation reaction.

4. The method for manufacturing a dispersion, according to claim 3, wherein one of said at least two types of liquids is a solution containing a pigment and a dispersing agent, and another liquid is a solvent decreasing the solubility of the pigment.

5. The method for manufacturing a dispersion, according to claim 1, wherein the reaction is a coupling reaction.

6. The method for manufacturing a dispersion, according to claim 5, wherein one of said at least two types of liquids is a solution containing a coupler and a dispersing agent, and another liquid contains a diazinium salt.

7. The method for manufacturing a dispersion, according to claim 1, wherein the reaction is a hydrolysis-polycondensation reaction.

8. The method for manufacturing a dispersion, according to claim 7, wherein one of said at least two types of liquids is a solution containing an inorganic alkoxide compound, and another liquid is an aqueous solvent.

9. A dispersion comprising: a dispersing medium and particles of a reaction product dispersed therein, which is formed by reaction between at least two types of liquids, wherein said at least two types of liquids are ejected from independently provided respective nozzles so that traveling directions of the liquids intersect with each other at an angle of 120° or less and so that the liquids then flow in an integrated manner, whereby the reaction product is formed.

10. The dispersion according to claim 9, wherein one of said at least two types of liquids is a solution containing a pigment and a dispersing agent, and another liquid is a solvent decreasing the solubility of the pigment.

11. A pigment ink for ink-jet recording, comprising the pigment dispersion according to claim 9 or 10.