Single pass printing of white on corrugated board

Patent metadata

Field	Value
Publication number	US-2017342284-A1
Application number	US-201715603880-A
Country	US
Kind code	A1
Filing date	May 24, 2017
Priority date	May 25, 2016
Publication date	Nov 30, 2017
Grant date	—

Abstract

The present invention is directed to a method for single pass printing on an absorbent non-white substrate. The method comprises: (a) applying a primer composition to one or more selected surfaces of an absorbent non-white substrate to form a primer layer to seal the selected surfaces of the substrate, (b) drying the primer layer, (c) printing a white ink on the primer layer, and (d) drying or curing the white ink. The present invention also relates to low odor radiation curable white ink compositions. The composition comprises 10-40% w/w of 4-hydrobutylacrylate, 0.5-10% of a urethane (meth)acrylate oligomer, 10-55% of diacrylates, one or more photoinitiators, one or more additives, and one or more white pigments. The composition excludes many monofunctional monomers that have distinct odor and are commonly used in an ink jet composition.

First claim

What is claimed is:

1 . A method for single pass printing on an absorbent non-white substrate, comprising:
applying a primer composition to one or more selected surfaces of a substrate to form a primer layer to seal the selected surfaces of the substrate, drying the primer layer, printing a white ink on the primer layer, and drying or curing the white ink.

2 . The method according to claim 1 , wherein the white ink is cured with actinic radiation.

3 . The method according to claim 1 , wherein the primer composition is a water based composition comprising an acrylic polymer emulsion, a deformer, a surfactant or a wetting agent, wax, and water.

4 . The method according to claim 1 , wherein the acrylic polymer emulsion comprises a copolymer of styrene and acrylic acid ester.

5 . The method according to claim 1 , after drying or curing the white ink, further comprises the steps of depositing a color ink on top of the white ink, and drying or curing the color ink with actinic radiation.

6 . The method according to claim 1 , wherein said white ink is a low odor radiation curable composition comprising:
10-40% w/w of 4-hydrobutylacrylate, 0.5-10% of a urethane (meth)acrylate oligomer, 10-55% of diacrylates, one or more photoinitiators, one or more additives, and a white pigment; wherein the ink composition contains less than 1% of a monofunctional momoner that has an undesired odor selected from the group consisting of: vinyl caprolactam, 2-phenoxyethyl acrylate, isodecyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, isooctyl acrylate, octyldecyl acrylate, isobornyl acrylate, cycloaliphatic acrylate monomer, benzyl acrylate, di(ethylene glycol) 2-ethylhexyl acrylate, tridecyl acrylate, 2(2-ethoxyethoxy) ethyl acrylate, lauryl acrylate, and tetrahydrofurfuryl acrylate.

7 . A low odor radiation curable white ink composition, comprising:
10-40% w/w of 4-hydrobutylacrylate, 0.5-10% of a urethane (meth)acrylate oligomer, 10-55% of diacrylates, one or more photoinitiators, one or more additives, and a white pigment; wherein the ink composition contains less than 1% of a monofunctional momoner that has an undesired odor selected from the group consisting of: vinyl caprolactam, 2-phenoxyethyl acrylate, isodecyl acrylate, 3,3,5-trimethylcyclohexyl acrylate, isooctyl acrylate, octyldecyl acrylate, isobornyl acrylate, cycloaliphatic acrylate monomer, benzyl acrylate, di(ethylene glycol) 2-ethylhexyl acrylate, tridecyl acrylate, 2(2-ethoxyethoxy) ethyl acrylate, lauryl acrylate, and tetrahydrofurfuryl acrylate.

8 . The ink composition of claim 7 , comprising 0.01-5% by weight of the one or more additives.

9 . The ink composition of claim 8 , wherein the additive is a surfactant, a leveling additive, dispersant, or a stabilizer.

10 . The ink composition of claim 7 , comprising 10-35% by weight of the white pigment.

11 . The ink composition of claim 6 , wherein the ink viscosity is 5-14 cP at 45° C., or less than 30 cp at 25° C.

Assignees

• Electronics For Imaging Inc

Inventors

• Samuel Joshua
• Billow Steven A
• Bruck Iii Frank J
• Zhang Huilei

Classifications

• C09D11/38

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

• C09D11/322

  Pigment inks · CPC title

• C09D11/101 Primary

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

• C09D11/12

  based on waxes or bitumen · CPC title

• B41M7/0081

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