Inkjet-recording medium and method of producing the same

Abstract

An inkjet-recording medium comprising a support and an ink-receiving layer formed thereon containing inorganic fine particles, a water-soluble aluminum compound, a zirconium compound, a cationic modified self-emulsifying polymer, a polyvinyl alcohol having a saponification value of 92 to 98 mol %, and a crosslinking agent, and a method of producing the same.

Description

Claims

1. An inkjet-recording medium comprising a support and an ink-receiving layer formed thereon containing inorganic fine particles, a water-soluble aluminum compound, a zirconium compound, a cationic modified self-emulsifying polymer, a polyvinyl alcohol having a saponification value of 92 to 98 mol %, and a crosslinking agent.

2. The inkjet-recording medium of claim 1, wherein the inorganic fine particles are silica fine particles.

3. The inkjet-recording medium of claim 2, wherein the silica fine particles are vapor-phase-process silica particles having a BET specific surface area of 200 m2/g or more.

4. The inkjet-recording medium of claim 1, wherein the polymerization degree of the polyvinyl alcohol is 1,500 to 3,600.

5. The inkjet-recording medium of claim 1, wherein the water-soluble aluminum compound is a basic polyaluminum hydroxide compound.

6. The inkjet-recording medium of claim 1, wherein the zirconium compound is zirconyl acetate.

7. The inkjet-recording medium of claim 1, wherein the self-emulsifying polymer is a cationic group-containing urethane resin.

8. The inkjet-recording medium of claim 1, wherein the crosslinking agent is boric acid or a borate salt.

9. A method of producing an inkjet-recording medium, comprising: preparing a dispersion by counter-colliding inorganic fine particles and a zirconium compound, or by passing inorganic fine particles and a zirconium compound through an orifice, by using a high-pressure dispersing machine;preparing an ink-receiving layer-forming solution by adding a cationic modified self-emulsifying polymer, a polyvinyl alcohol having a saponification value of 92 to 98 mol %, and a crosslinking agent to the dispersion; andforming a coated layer by applying a coating solution prepared by in-line mixing of a water-soluble aluminum compound in the ink-receiving layer-forming solution, on a support.

10. The method of producing an inkjet-recording medium of claim 9, further comprising crosslinking and hardening the coated layer by applying thereon a basic solution having a pH of 7.1 or more, either (1) simultaneously with application of the coating solution, or (2) before the coated layer exhibits a falling drying rate during drying of the coated layer.

11. A method of producing an inkjet-recording medium, comprising: preparing a dispersion by counter-colliding inorganic fine particles, a zirconium compound and a crosslinking agent, or by passing inorganic fine particles, a zirconium compound and a crosslinking agent through an orifice, by using a high-pressure dispersing machine;preparing an ink-receiving layer-forming solution by adding a cationic modified self-emulsifying polymer and a polyvinyl alcohol having a saponification value of 92 to 98 mol % to the dispersion; andforming a coated layer by applying a coating solution prepared by in-line mixing of a water-soluble aluminum compound in the ink-receiving layer-forming solution, on a support.

12. The method of producing an inkjet-recording medium of claim 11, further comprising crosslinking and hardening the coated layer by applying thereon a basic solution having a pH of 7.1 or more, either (1) simultaneously with application of the coating solution, or (2) before the coated layer exhibits a falling drying rate during drying of the coated layer.