Inkjet printing outdoor graphics

Patent metadata

Field	Value
Publication number	US-9751337-B2
Application number	US-201515304552-A
Country	US
Kind code	B2
Filing date	Apr 29, 2015
Priority date	May 6, 2014
Publication date	Sep 5, 2017
Grant date	Sep 5, 2017

Abstract

An inkjet printing method for producing images durable for outdoor usage includes the steps of: a) inkjet printing on a substrate a UV curable colorless primer including monofunctional monomers in a range of 40 wt % to 65 wt % based on the total weight of the UV curable colorless primer; b) at least partially UV curing the inkjet printed UV curable colorless primer; and c) inkjet printing on the at least partially cured UV curable colorless primer one or more UV curable color inkjet inks including monofunctional monomers in a range of 30 wt % to 60 wt % based on the total weight of the UV curable color inkjet inks; wherein a ratio of the wt % monofunctional monomers in the UV curable colorless primer over the wt % monofunctional monomers in the one or more UV curable color inkjet inks is between 0.65 and 2.10.

First claim

The invention claimed is:

1. An inkjet printing method for producing images, the method comprising the steps of:
inkjet printing on a substrate a UV curable colorless primer including monofunctional monomers in a range of 40 wt % to 65 wt % based on a total weight of the UV curable colorless primer;
at least partially UV curing the inkjet printed UV curable colorless primer; and
inkjet printing on the at least partially UV cured UV curable colorless primer one or more UV curable color inkjet inks, each of the one or more UV curable color inkjet inks including monofunctional monomers in a range of 30 wt % to 60 wt % based on a total weight of the respective UV curable color inkjet ink; wherein
a ratio of the wt % of the monofunctional monomers in the UV curable colorless primer to the wt % of the monofunctional monomers in the one or more UV curable color inkjet inks is between 0.65 and 2.10.

2. The inkjet printing method according to claim 1 , wherein an absolute difference in wt % of the monofunctional monomers in the UV curable colorless primer and the wt % of the monofunctional monomers in the one or more UV curable color inkjet inks is at least 8 wt %.

3. The inkjet printing method according to claim 1 , wherein the monofunctional monomers in the UV curable colorless primer consist of monoacrylates.

4. The inkjet printing method according to claim 1 , wherein the monofunctional monomers in the one or more UV curable color inkjet inks consist of monoacrylates.

5. The inkjet printing method according to claim 1 , wherein the UV curable colorless primer and the one or more UV curable color inkjet inks are free radical curable compositions.

6. The inkjet printing method according to claim 1 , wherein the UV curable colorless primer includes more than 6 wt % of a phosphineoxide type photoinitiator.

7. The inkjet printing method according to claim 6 , wherein the phosphineoxide type photoinitiator is 2,4,6-trimethylbenzoyl-diphenyl-phosphineoxide.

8. The inkjet printing method according to claim 1 , wherein the one or more UV curable color inkjet inks includes a UV curable yellow inkjet ink including a pigment selected from the group consisting of C.I Pigment Yellow 150, C.I Pigment Yellow 151, C.I Pigment Yellow 155, and C.I Pigment Yellow 180.

9. The inkjet printing method according to claim 8 , wherein the pigment is C.I. Pigment Yellow 155.

10. The inkjet printing method according to claim 1 , wherein the UV curable colorless primer includes no thioxanthone type photoinitiator.

11. The inkjet printing method according to claim 1 , wherein a surface tension of the UV curable colorless primer is at least 2 mN/m larger than a surface tension of the one or more UV curable color inkjet inks.

12. The inkjet printing method according claim 1 , wherein the one or more UV curable color inkjet inks include a plurality of UV curable color inkjet inks defining a UV curable CMYK inkjet ink set.

13. An article comprising:
an image obtained by the inkjet printing method according to claim 1 .

14. The article of claim 13 , wherein the article is selected from the group consisting of signage, billboards, banners, exhibition panels, construction announcements, and ad panels.

Assignees

• Agfa Graphics Nv

Inventors

• Steert Koen

Classifications

• C09D11/101

  Inks specially adapted for printing processes involving curing by wave energy or particle radiation, e.g. with UV-curing following the printing · CPC title

• B41M7/0081 Primary

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

• G09F7/00

  Signs, name or number plates, letters, numerals, or symbols (vehicle registration number plates B60R13/10); Panels or boards (show-cards G09F1/00; indicating arrangements for variable information G09F9/00, G09F11/00; illuminated signs G09F13/00; boards for notices or posters G09F15/00) · CPC title

• B41J11/002 Primary

  Curing or drying the ink on the copy materials, e.g. by heating or irradiating · CPC title