Laminated packaging material for liquid food products, a method for making the same, a method for printing on the same and a package made from the same

Patent metadata

Field	Value
Publication number	US-12371248-B2
Application number	US-201917271851-A
Country	US
Kind code	B2
Filing date	Aug 23, 2019
Priority date	Aug 28, 2018
Publication date	Jul 29, 2025
Grant date	Jul 29, 2025

Abstract

A laminated packaging material for liquid food products comprising, a core layer of paper or paperboard or other cellulose-based material, a laminate portion being arranged on a first side of the core layer, a dark colored flexographic ink composition printed onto the free surface of the laminate portion, the dark colored ink composition comprises color bases mixed at a ratio such that a total energy absorption by the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80%, such as below 70% in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature of 3000 K, the dark colored flexographic ink composition has a color space lightness value L*≤25, and a color space difference equal to or lower than 6, with respect to a specified black reference composition.

First claim

The invention claimed is:

1. A laminated packaging material for liquid food products comprising,
a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side is on the opposite side from the first side of the core layer of the paper or paperboard or other cellulose-based material,
a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
a dark colored flexographic ink composition that is printed onto a surface of the laminate portion not in contact with the core layer and that is cured through heating to dry the dark colored flexographic ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored flexographic ink composition at least partly covering the surface not in contact with the core layer, and
wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption by the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature of 3000 K,
wherein the dark colored flexographic ink composition has a color space lightness value L*≤25, and
wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition,
wherein the black reference composition has in the color space;
a lightness value L*=17,
a red-green color component a*=0, and
a blue-yellow color component b*=0.

2. A packaging material for liquid food products according to claim 1 ,
wherein the dark colored flexographic ink composition has a red-green color component (a*) in the range from −4.6 to +4.6 in the color space, and a blue-yellow color component (b*) in the range from −7 to +7 in the color space.

3. A packaging material for liquid food products according to claim 1 , wherein the color space difference is equal to or lower than 4.

4. A packaging material for liquid food products according to claim 1 , wherein the dark colored flexographic ink composition has a red-green color component (a*) in the range from −3.0 to +3.0 in the color space, and a blue-yellow color component (b*) in the range from −4.4 to +4.4 in the color space.

5. A packaging material for liquid food products according to claim 1 , wherein the laminate portion comprises a thermoplastic polymer layer.

6. A packaging material for liquid food products according to claim 1 , wherein the laminate portion comprises a pre-manufactured polymer film.

7. A packaging material for liquid food products according to claim 1 , wherein the laminate portion comprises a pre-manufactured polymer film laminated on the first side of the core layer, and wherein a second laminating layer comprising a thermoplastic polymer adheres the pre-manufactured polymer film to the first side of the core layer.

8. A packaging material for liquid food products according to claim 7 , wherein the second laminating layer and the thermoplastic polymer comprises low-density polyethylene and/or linear low density polyethylene.

9. A packaging material for liquid food products according to claim 1 , wherein the second side of the core layer is laminated to an inside layer of a liquid tight thermoplastic polymer, the inside layer being intended for food product contact.

10. A packaging material for liquid food products according to claim 1 , comprising ink-jet printed features.

11. A packaging material for liquid food products according to claim 1 , wherein the laminate portion comprises a metalized polymer film or a holographic polymer film.

12. A liquid food package comprising,
a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side being on the opposite side from the first side of the core layer of paper or paperboard or other cellulose-based material,
a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
a dark colored flexographic ink composition that is printed onto a surface of the laminate portion not in contact with the core layer and that is cured through heating to dry the dark colored flexographic ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored flexographic ink composition at least partly covering the surface not in contact with the core layer, and, wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption of the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature 3000 K,
wherein the dark colored flexographic ink composition has a color space lightness value L*≤25, and
wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition,
wherein the black reference composition has in the color space;
a lightness value L*=17,
a red-green color component a*=0, and
a blue-yellow color component b*=0.

13. A liquid food package according to claim 12 ,
comprising ink-jet printed features.

14. A laminated packaging material for liquid food products comprising,
a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side is on the opposite side from the first side of the core layer of the paper or paperboard or other cellulose-based material,
a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose-based material,
a dark colored flexographic ink composition that is printed onto a surface of the laminate portion not in contact with the core layer and that is cured through infrared irradiation to dry the dark colored flexographic ink composition so that a printed pattern exists on the surface of the laminate portion, the dark colored flexographic ink composition at least partly covering the surface not in contact with the core layer, and
wherein the dark colored flexographic ink composition comprises color bases mixed at a ratio such that a total energy absorption by the dark colored flexographic ink composition, when provided on the laminated packaging material, is below 80% of the radiance energy in an emission spectra from a tungsten light source in the region 250-2500 nm at a temperature of 3000 K,
wherein the dark colored flexographic ink composition has a color space lightness value L*≤25, and
wherein the dark colored flexographic ink composition has a color space difference, ΔE2000, equal to or lower than 6, with respect to a black reference composition, wherein the black reference composition has in the color space;
a lightness value L*=17,
a red-green color component a*=0, and
a blue-yellow color component b*=0.

15. A method of printing on a laminated packaging material for liquid food products comprising,
providing a core layer of paper or paperboard or other cellulose-based material having a first and a second side, the second side is on the opposite side from the first side of the core layer of paper or paperboard or other cellulose-based material, a laminate portion being arranged on the first side of the core layer of paper or paperboard or other cellulose

Assignees

• Tetra Laval Holdings & Finance

Inventors

• Olsson Sverker
• Glemming Anders
• Bäckman Martin
• Karlsson Christer

Classifications

• C09D11/30

  Inkjet printing inks · CPC title

• C09D11/037

  characterised by the pigment · CPC title

• B65D2207/00

  Standing packages · CPC title

• B41M5/0047

  by ink-jet printing · CPC title

• B41M1/36 Primary

  on pretreated paper, e.g. parchment, oiled paper, paper for registration purposes {(B41M5/50 takes precedence)} · CPC title