UV curable inkjet inks

Patent metadata

Field	Value
Publication number	US-10119041-B2
Application number	US-201515125232-A
Country	US
Kind code	B2
Filing date	Apr 15, 2015
Priority date	Apr 15, 2014
Publication date	Nov 6, 2018
Grant date	Nov 6, 2018

Abstract

An inkjet printing method includes the steps of: a) jetting on a substrate one or more aqueous UV curable inkjet inks including at least one photoinitiator and capsules composed of a cross-linked polymeric shell surrounding a core, with the core containing UV curable compounds; and b) applying UV radiation to the one or more aqueous UV curable inkjet inks jetted on the substrate.

First claim

The invention claimed is:

1. An inkjet printing method comprising the steps of:
jetting one or more aqueous UV curable inkjet inks on a substrate, each of the one or more aqueous UV curable inkjet inks including at least one photoinitiator and capsules including a cross-linked polymeric shell surrounding a core that includes a UV curable compound;
applying UV radiation to the one or more aqueous UV curable inkjet inks jetted on the substrate; and
exposing the one or more aqueous UV curable inkjet inks to infrared radiation between the step of jetting and the step of applying UV radiation; wherein the UV radiation is emitted by UV LEDs; and
the infrared radiation is emitted by a Near InfraRed radiation source having an emission maximum between (0.8 μm and 1.5 μm or a Carbon InfraRed radiation source having an emission maximum between 2.0 μm and 3.5 μm.

2. The inkjet printing method according to claim 1 , wherein the emission maximum is between 0.8 μm and 1.5 μm.

3. The inkjet printing method according to claim 1 , wherein the emission maximum is between 2.0 μm and 3.5 μm.

4. The inkjet printing method according to claim 1 , wherein the UV radiation causes the UV curable compound to pass through the cross-linked polymeric shell.

5. The inkjet printing method according to claim 1 , wherein the capsules include a colorant.

6. The inkjet printing method according to claim 1 , wherein the capsules are dispersed in an aqueous medium using a dispersing group covalently bonded to the cross-linked polymeric shell, and the dispersing group is selected from the group consisting of a carboxylic acid or salt thereof, a sulfonic acid or salt thereof, a phosphoric acid ester or salt thereof, a phosphonic acid or salt thereof, an ammonium group, a sulfonium group, and a phosphonium group.

7. The inkjet printing method according to claim 1 , wherein the one or more aqueous UV curable inkjet inks include an optothermal converting agent for infrared radiation.

8. The inkjet printing method according to claim 1 , wherein the at least one photoinitiator is present in the core of the capsules.

9. The inkjet printing method according to claim 1 , wherein the one or more aqueous UV curable inkjet inks include polymeric latex particles.

10. An inkjet printing device comprising:
an inkjet print head;
an infrared radiation source located downstream of the inkjet print head; and
a UV curing device located downstream of the infrared radiation source; wherein the infrared radiation source exposes one or more aqueous UV curable inkjet inks jetted by the inkjet print head to infrared radiation;
the UV curing device includes UV LEDs that emit UV radiation having a wavelength larger than 360 nm; and
the infrared radiation is emitted by a Near infraRed radiation source having an emission maximum between 0.8 μm and 1.5 μm or a Carbon infraRed radiation source having an emission maximum between 2.0 μm and 3.5 μm.

11. The inkjet printing device according to claim 10 , further comprising a pre-heating device located upstream of the inkjet print head.

12. A manufacturing line for printed textiles and leather articles comprising:
the inkjet printing device according to claim 10 to print on a textile or a leather substrate; wherein
the leather substrate includes natural leather and artificial leather.

13. A manufacturing line for packaging of foodstuffs or pharmaceuticals comprising:
the inkjet printing device according to claim 10 to print on a packaging substrate.

Assignees

• Agfa Nv

Inventors

• Loccufier Johan
• Decoster Luc

Classifications

• B01J13/16

  Interfacial polymerisation · CPC title

• C09D11/102

  containing macromolecular compounds obtained by reactions other than those only involving unsaturated carbon-to-carbon bonds · CPC title

• B41M7/0081

  using electromagnetic radiation or waves, e.g. ultraviolet radiation, electron beams · CPC title

• C09D11/10

  based on artificial resins · CPC title

• B01J13/14

  Polymerisation; cross-linking · CPC title