ACTINIC RADIATION CURABLE JET-PRINTING INK

• US 20090171007A1
• Filed: 07/21/2006
• Published: 07/02/2009
• Est. Priority Date: 07/25/2005
• Status: Active Grant

• Current Assignee: TOYO Ink Manufacturing Company Limited
• Original Assignee: TOYO Ink Manufacturing Company Limited
• Inventors: Nishida, Daisuke, Yoshihiro, Yasuo, Jonai, Kazuhiro
• Granted Patent: US 8,105,679 B2
• Time in Patent Office: Days
• US Class Current: 524/548
• CPC Class Codes: C09D 11/101 Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing
• CPC Class Codes: Y10T 428/24802 Discontinuous or differential coating, impregnation or bond [e.g., artwork, printing, retouched photograph, etc.]

Abstract

The present invention relates to an active energy beam-curable ink comprising polymerizable monomers, wherein relative to the total of all the polymerizable monomers, the polymerizable monomers comprise from 95 to 99.99% by weight of a monofunctional monomer and from 0.01 to 5% by weight of a polyfunctional monomer, and a cured film of thickness 10 μm formed using the active energy beam-curable ink exhibits a drawing ability exceeding 120% when stretched at a temperature of 170° C. at a strain rate of 2/min.

Claims

1. :

An active energy beam-curable ink comprising polymerizable monomers, wherein

relative to a total of all the polymerizable monomers, the polymerizable monomers comprise from 95 to 99.99% by weight of a monofunctional monomer and from 0.01 to 5% by weight of a polyfunctional monomer, and

a cured film of thickness 10 μ

m formed using the active energy beam-curable ink exhibits a drawing ability exceeding 120% when stretched at a temperature of 170°

C. at a strain rate of 2/min.

3. :

The active energy beam-curable ink according to claim 1, wherein a Martens hardness of the cured film of thickness 10 μ

m is not less than 160 N/mm².

4. :

The active energy beam-curable ink according to claim 1, wherein a glass transition point of the cured film of thickness 10 μ

m is not less than 25°

C.

5. :

The active energy beam-curable ink according to claim 1, wherein relative to a total of all the polymerizable monomers, the polymerizable monomers comprise from 50 to 100% by weight of monomers having a cyclic structure.

6. :

The active energy beam-curable ink according to claim 1, wherein relative to a total of all the polymerizable monomers, the polymerizable monomers comprise from 30 to 99.99% by weight of a monomer selected from the group consisting of 2-phenoxyethyl acrylate, ethylene oxide adduct monomers of 2-phenoxyethyl acrylate, and propylene oxide adduct monomers of 2-phenoxyethyl acrylate.

7. :

The active energy beam-curable ink according to claim 1, wherein relative to a total of all the polymerizable monomers, the polymerizable monomers comprise from 1 to 30% by weight of 2-hydroxy-3-phenoxypropyl acrylate.

8. :

The active energy beam-curable ink according to claim 1, further comprising a pigment.

9. :

The active energy beam-curable ink according to claim 1, wherein the active energy beam is ultraviolet radiation.

10. :

The active energy beam-curable ink according to claim 1, wherein a molecular weight of the polyfunctional monomer is less than 2,000.

11. :

The active energy beam-curable ink according to claim 1, wherein the polyfunctional monomer is a bifunctional monomer.

12. :

An ink set comprising at least four active energy beam-curable inks according to claim 8, wherein the pigments contained within each of the active energy beam-curable inks are mutually different.

13. :

An ink set according to claim 12, wherein the four active energy beam-curable inks are yellow, magenta, cyan and black inks.

14. :

A cured film formed using the active energy beam-curable ink according to claim 1.

15. :

A printed item comprising a printing substrate and the cured film according to claim 14.

2. :

An active energy beam-curable ink comprising polymerizable monomers, wherein

relative to the total of all the polymerizable monomers, the polymerizable monomers comprise from 95 to 99.99% by weight of a monofunctional monomer and from 0.01 to 5% by weight of a polyfunctional monomer, and

a cured film of thickness 10 μ

m formed using the active energy beam-curable ink exhibits a storage elastic modulus (E′

) within a range from 1×

10⁴ to 5×

10⁷ Pa at an oscillation frequency of 1 Hz and a temperature within a range from 100 to 150°

C.