Ink jet recording method and recorded matter

Patent metadata

Field	Value
Publication number	US-9108404-B2
Application number	US-201414220476-A
Country	US
Kind code	B2
Filing date	Mar 20, 2014
Priority date	Mar 22, 2013
Publication date	Aug 18, 2015
Grant date	Aug 18, 2015

Abstract

An ink jet recording method includes discharging a first ink composition onto a recording medium using a recording head, in which the first ink composition includes a coloring material, an alkane diol with 4 or more to 8 or fewer carbon atoms, a water-soluble solvent, and water; the recording head discharges the first ink composition using a piezoelectric element, and has a resolution per unit length of 200 dpi or more, and the recording medium has an absorbing layer on the surface thereof, in which a nonpolar component of a surface free energy of the absorbing layer is 20 mN/m or lower.

First claim

What is claimed is:

1. An ink jet recording method comprising discharging a first ink composition onto a recording medium using a recording head,
wherein the first ink composition includes a coloring material, an alkane diol with 4 or more to 8 or fewer carbon atoms, a water-soluble solvent, and water,
the recording head discharges the first ink composition using a piezoelectric element, and has a resolution per unit length of 200 dpi or more,
the recording head performs recording of an image using droplets of 5 pl or more to 15 pl or less, and
the recording medium has an absorbing layer on the surface thereof, in which a nonpolar component γsd of a surface free energy of the absorbing layer calculated using the following formulae (1) and (2) is 20 mN/m or lower,
γ l M (1+COS θ M )=2(γ sd·γld M ) 0.5 +2(γ sp·γlp M ) 0.5   (1)

γ l W (1+COS θ W )=2(γ sd·γld W ) 0.5 +2(γ sp·γlp W ) 0.5   (2)

(where, in formulae (1) and (2), γld M represents a nonpolar component of a surface free energy of diiodomethane, γlp M represents a polar component of a surface free energy of diiodomethane, γl M represents a surface free energy of diiodomethane (=γld+γlp), θ M represents a contact angle of diiodomethane on the absorbing layer, γld W represents a nonpolar component of a surface free energy of water, γlp W represents a polar component of a surface free energy of water, γl W represents a surface free energy of water (=γld+γlp), θ W represents a contact angle of water on the absorbing layer, γsd represents a nonpolar component of a surface free energy of the absorbing layer, and γsp represents a polar component of a surface free energy of the absorbing layer).

2. The ink jet recording method according to claim 1 , wherein a polar component of a surface free energy of the absorbing layer calculated with the formula (1) is 20 mN/m or lower.

3. The ink jet recording method according to claim 1 ,
wherein a second ink composition containing a coloring material with the same color as the first ink composition contains coloring material in which the content rate of a color material is lower than the content rate of the color material in the first ink composition and including an alkane diol with 4 or more to 8 or fewer carbon atoms at a content rate of 1 mass % or higher to 10 mass % or lower is used along with the first ink composition.

4. The ink jet recording method according to claim 1 , wherein the absorbing layer includes a metal hydroxide.

5. The ink jet recording method according to claim 1 , wherein the first ink composition includes an alkylene glycol alkyl ether represented by the following formula (3),
R 1 —(O—CH 2 —CH(—CH 3 )) k —(O—CH 2 —CH 2 ) n —O—R 2   (3)

(where, in formula (3), R 1 and R 2 each independently represent a hydrogen atom or an alkyl group with 1 or more to 4 or fewer carbon atoms, n is a number of 0 or higher and 3 or less, k is a number of 0 or higher and 3 or less, R 1 and R 2 are not hydrogen atoms at the same time, and n and k are not 0 at the same time).

6. The ink jet recording method according to claim 1 , wherein the absorbing layer is provided on a base material, and has a cracking region that spans from the surface thereof to the base material.

Assignees

• Seiko Epson Corp

Inventors

• Okuyama Tomoyuki

Classifications

• Y10T428/24802

  Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.] · CPC title

• C09D11/40

  Ink-sets specially adapted for multi-colour inkjet printing · CPC title

• B41J2/135 Primary

  Nozzles · CPC title

• C09D11/38

  characterised by non-macromolecular additives other than solvents, pigments or dyes · CPC title

• B41M5/0023

  Digital printing methods characterised by the inks used (inks per se C09D11/00) · CPC title