PACKAGING LAMINATE

• US 20100047404A1
• Filed: 11/29/2007
• Published: 02/25/2010
• Est. Priority Date: 12/01/2006
• Status: Abandoned Application

• Current Assignee: Akzo Nobel N.V. (Nouryon BV)
• Original Assignee: Akzo Nobel N.V. (Nouryon BV)
• Inventors: Solhage, Fredrik, Hällström, Hans, Gratz, Susanne
• Application Number:
  US12/515,945
• Publication Number:
  US 20100047404A1
• Time in Patent Office: Days
• US Class Current: 426/124
• CPC Class Codes: B32B 27/10 of paper or cardboard
• CPC Class Codes: B32B 27/30 comprising vinyl (co)polymers; comprising acrylic (co)polymers
• CPC Class Codes: B32B 27/32 comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/36 comprising polyesters
• CPC Class Codes: B32B 29/00 Layered products comprising a layer of paper or cardboard
• CPC Class Codes: D21H 17/375 Poly(meth)acrylamide
• CPC Class Codes: D21H 17/42 anionic
• CPC Class Codes: D21H 17/455 comprising tertiary amine or being at least partially quaternised
• CPC Class Codes: D21H 21/54 being spherical, e.g. microcapsules, beads
• CPC Class Codes: D21H 27/10 Packing paper packaging materials of special type or form B65D65/38
• CPC Class Codes: D21H 27/30 Multi-ply for surface covering D21H27/18; making on paper-making machines D21F9/00, D21F11/00
• CPC Class Codes: Y10T 156/10 Methods of surface bonding and/or assembly therefor
• CPC Class Codes: Y10T 428/249972 Resin or rubber element
• CPC Class Codes: Y10T 428/31783 Paper or wood
• CPC Class Codes: Y10T 428/31993 Of paper

Abstract

The invention relates to a packaging laminate comprising at least one base layer of paper or paper board and at least one liquid barrier layer, said paper or paper board being sized with a formulation comprising a sizing agent selected from the group consisting of ketene dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also comprising an acrylamide based polymer The invention further relates to the production and use of a packaging laminate and a package for food or beverage products and its production.

Claims

1. A packaging laminate comprising at least one base layer of paper or paper board and at least one liquid barrier layer, said paper or paper board being sized with a formulation comprising a sizing agent selected from the group consisting of ketene dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also comprising an acrylamide based polymer.

2. The packaging laminate as claimed in claim 1 further comprising at least one gas barrier layer.

3. The packaging laminate as claimed in claim 1, wherein the acrylamide based polymer has a weight average molecular weight of at least about 10000.

4. The packaging laminate as claimed in claim 1, wherein the acrylamide based polymer is cationic.

5. The packaging laminate as claimed in claim 4, wherein the charge density of the cationic acrylamide based polymer is from about 0.1 to about 11 meq/g.

6. The packaging laminate as claimed in claim 1, wherein the acrylamide based polymer is obtained by polymerising acrylamide or acrylamide based monomers in combination with one or more ethylenically unsaturated cationic, potentially cationic, anionic or potentially anionic monomers.

7. The packaging laminate as claimed in claim 6, wherein the acrylamide based polymer is obtained by polymerising acrylamide or acrylamide based monomers in combination with one or more ethylenically unsaturated cationic or potentially cationic monomer being a diallyldialkyl ammonium halide or being represented by the general structural formula (II):

wherein R₁ is H or CH₃;

R₂ and R₃ are, independently of each other, H or a hydrocarbon group;

A is O or NH;

B is an alkyl or alkylene group having from 2 to 8 carbon atoms or a hydroxy propylene group;

R₄ is H or a hydrocarbon group having from 1 to 4 carbon atoms or a substituent containing an aromatic group which can be attached to the nitrogen by means of an alkylene group; and

X⁻

is an anionic counter ion.

8. The packaging laminate as claimed in claim 7, wherein at least one cationic monomer is selected from the group consisting of dimethylaminoethyl acrylate methyl chloride quaternary salt, dimethylaminoethyl methacrylate methyl chloride quaternary salt, dimethyl-aminoethyl acrylate benzyl chloride quaternary salt and dimethylaminoethyl methacrylate benzyl chloride quaternary salt.

9. The packaging laminate as claimed in claim 1, wherein the sizing agent is selected from the group consisting of ketene dimers and multimers and mixtures thereof.

10. The packaging laminate as claimed in claim 1, wherein the paper or paper board comprises thermoplastic microspheres.

11. The packaging laminate as claimed in claim 10, wherein the thermoplastic microspheres are expanded.

12. A process for the production of a packaging laminate comprising a step of applying at least one liquid barrier layer to a sheet or web of paper or paper board being sized with a formulation comprising a sizing agent selected from the group consisting of ketene dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also comprising an acrylamide based polymer.

13. (canceled)

14. A sealed package for food or beverage products made of a packaging laminate comprising at least one base layer of paper or paper board and at least one liquid barrier layer, said paper or paper board being sized with a formulation comprising a sizing agent selected from the group consisting of ketene dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also comprising an acrylamide based polymer.

16. The sealed package as claimed in claim 14, wherein the acrylamide based polymer has a weight average molecular weight of at least about 10000.

17. The sealed package as claimed in claim 16, wherein the acrylamide based polymer is obtained by polymerising acrylamide or acrylamide based monomers in combination with one or more ethylenically unsaturated cationic or potentially cationic monomer being a diallyldialkyl ammonium halide or being represented by the general structural formula (II):

wherein R₁ is H or CH₃;

R₂ and R₃ are, independently of each other, H or a hydrocarbon group;

A is O or NH;

B is an alkyl or alkylene group having from 2 to 8 carbon atoms or a hydroxy propylene group;

R₄ is H or a hydrocarbon group having from 1 to 4 carbon atoms or a substituent containing an aromatic group which can be attached to the nitrogen by means of an alkylene group; and

X⁻

is an anionic counter ion.

15. A process for the production of a sealed package comprising the steps of forming a container from a packaging laminate comprising at least one base layer of paper or paper board and at least one liquid barrier layer, said paper or paper board being sized with a formulation comprising a sizing agent selected from the group consisting of ketene dimers and multimers, succinic anhydrides, rosins and mixtures thereof, and also comprising an acrylamide based polymer, filling the container with a food or beverage product, and sealing the container.

18. The process as claimed in claim 15, wherein the acrylamide based polymer has a weight average molecular weight of at least about 10000.

19. The process as claimed in claim 18, wherein the acrylamide based polymer is obtained by polymerising acrylamide or acrylamide based monomers in combination with one or more ethylenically unsaturated cationic or potentially cationic monomer being a diallyldialkyl ammonium halide or being represented by the general structural formula (II):

wherein R₁ is H or CH₃;

R₂ and R₃ are, independently of each other, H or a hydrocarbon group;

A is O or NH;

B is an alkyl or alkylene group having from 2 to 8 carbon atoms or a hydroxy propylene group;

R₄ is H or a hydrocarbon group having from 1 to 4 carbon atoms or a substituent containing an aromatic group which can be attached to the nitrogen by means of an alkylene group; and

X⁻

is an anionic counter ion.