IMAGE FORMING METHOD

• US 20150166819A1
• Filed: 03/02/2015
• Published: 06/18/2015
• Est. Priority Date: 09/27/2012
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: SHINOHARA, Ryuji
• Granted Patent: US 9,517,635 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: B41J 2/01 Ink jet
• CPC Class Codes: B41J 2/2107 characterised by the ink properties supplying ink in a solid state B41J2/17593
• CPC Class Codes: B41J 2/2114 Ejecting specialized liquids, e.g. transparent or processing liquids B41J2/211 takes precedence
• CPC Class Codes: C09D 11/322 Pigment inks
• CPC Class Codes: C09D 11/38 characterised by non-macromolecular additives other than solvents, pigments or dyes
• CPC Class Codes: C09D 11/40 Ink-sets specially adapted for multi-colour inkjet printing
• CPC Class Codes: C09D 11/54 Inks based on two liquids, one liquid being the ink, the other liquid being a reaction solution, a fixer or a treatment solution for the ink
• CPC Class Codes: C09D 139/06 Homopolymers or copolymers of N-vinyl-pyrrolidones

Abstract

An image forming method comprises: applying a treatment liquid, which contains an organic acidic compound represented by the following general formula (I), a water-soluble polymer compound, and water, on a recording medium; and applying an ink composition, which contains a pigment, a pyrrolidone derivative, a compound represented by the following general formula (II), and water, on a treatment liquid-applied surface of the recording medium. In the general formula (I), n represents an integer of 2 or greater and m represents an integer of 3 or greater. In the general formula (II), l, m, and n represent an integer of 1 or greater, the relation l+m+n=3 to 15 is satisfied, and AO represents ethyleneoxy or propyleneoxy.

Claims

1. An image forming method comprising:

applying a treatment liquid, which contains an organic acidic compound represented by the following general formula (I), a water-soluble polymer compound, and water, on a recording medium; and

applying an ink composition, which contains a pigment, a compound having a lactam structure of 5-membered ring, a compound represented by the following general formula (II), and water, on a treatment liquid-applied surface of the recording medium,

[Chem. 1]

C_nH<sub>2n+2−

m</sub>(COOH)_m 

 

General Formula (I)

wherein in the general formula (I), n represents an integer of 2 or greater and m represents an integer of 3 or greater, and

2. The image forming method according to claim 1, wherein the treatment liquid further contains silicone oil.

3. The image forming method according to claim 1, wherein in applying the ink composition, the recording medium is conveyed at a conveyance speed of 50 m/min or higher.

4. The image forming method according to claim 1, wherein the compound having the lactam structure of 5-membered ring is at least one of 2-pyrrolidone and N-methyl-2-pyrrolidone.

5. The image forming method according to claim 1, wherein the content of the compound having the lactam structure of 5-membered ring in the ink composition is 3.0 mass % to 20.0 mass % relative to the total mass of the ink composition.

6. The image forming method according to claim 1, wherein the content of the organic acidic compound in the treatment liquid is 0.5 mass % to 20.0 mass % relative to the total mass of the treatment liquid.

7. The image forming method according to claim 1, wherein AO in the general formula (II) is propyleneoxy.

8. The image forming method according to claim 1,

wherein the water-soluble polymer compound contains a structural unit represented by the following general formula (A) and a structural unit represented by the following general formula (B),

9. The image forming method according to claim 8, wherein R^b2 is a linear aliphatic hydrocarbon group having 1 to 12 carbon atoms, an aliphatic hydrocarbon group having a branched structure and 3 to 12 carbon atoms, an aliphatic hydrocarbon group having a ring structure and 3 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryloxyalkyl group having 7 to 12 carbon atoms.

10. The image forming method according to claim 8,

wherein R^a1 is a hydrogen atom, L^a1 is —

COO—

or —

CONH—

, L^a2 is an alkylene group having 1 to 12 carbon atoms, and A^a is a sulfonic acid group or a salt thereof, and

wherein R^b1 is a hydrogen atom or a methyl group, L^b1 is —

COO—

, and R^b2 is a linear aliphatic hydrocarbon group having 1 to 12 carbon atoms, an aliphatic hydrocarbon group having a branched structure and 3 to 12 carbon atoms, an aliphatic hydrocarbon group having a ring structure and 3 to 12 carbon atoms, an aralkyl group having 7 to 12 carbon atoms, or an aryloxyalkyl group having 7 to 12 carbon atoms.

11. The image forming method according to claim 4,

wherein the water-soluble polymer compound contains a structural unit represented by the following general formula (A) and a structural unit represented by the following general formula (B),