PACKAGING MATERIAL AND PACKAGING CONTAINER

• US 20170120556A1
• Filed: 05/28/2015
• Published: 05/04/2017
• Est. Priority Date: 05/28/2014
• Status: Active Grant

• Current Assignee: Tetra Laval Holdings & Finance SA (Tetra Laval Holdings BV)
• Original Assignee: Tetra Laval Holdings & Finance SA (Tetra Laval Holdings BV)
• Inventors: NYMAN, Ulf, ALDN, Mats, TOFT, Nils
• Granted Patent: US 10,328,666 B2
• Time in Patent Office: Days
• CPC Class Codes: B32B 1/00 Layered products having a non-planar shape
• CPC Class Codes: B32B 15/04 comprising metal as the main or only constituent of a layer, which is next to another layer of the same or of a different material next to a bituminous or tarry layer B32B11/08; next to a water-setting substance layer B32B13/06; next to a glass layer B32B17/061; next to a cellulosic plastic layer B32B23/042
• CPC Class Codes: B32B 15/08 of synthetic resin
• CPC Class Codes: B32B 15/085 comprising polyolefins
• CPC Class Codes: B32B 15/12 of paper or cardboard
• CPC Class Codes: B32B 15/20 comprising aluminium or copper B32B15/016 and B32B15/017 take precedence
• CPC Class Codes: B32B 2255/205 Metallic coating
• CPC Class Codes: B32B 2266/02 Organic
• CPC Class Codes: B32B 23/00 Layered products comprising a layer of cellulosic plastic substances , i.e. substances obtained by chemical modification of cellulose, e.g. cellulose ethers, cellulose esters, viscose
• CPC Class Codes: B32B 23/06 of paper or cardboard
• CPC Class Codes: B32B 23/08 of synthetic resin
• CPC Class Codes: B32B 2305/022 Foam
• CPC Class Codes: B32B 2307/50 having particular mechanical properties
• CPC Class Codes: B32B 2307/718 Weight, e.g. weight per square meter
• CPC Class Codes: B32B 2307/72 Density
• CPC Class Codes: B32B 2307/724 Permeability to gases, adsorption
• CPC Class Codes: B32B 2307/7242 Non-permeable
• CPC Class Codes: B32B 2307/7244 Oxygen barrier
• CPC Class Codes: B32B 2307/726 Permeability to liquids, absorption
• CPC Class Codes: B32B 2307/7265 Non-permeable
• CPC Class Codes: B32B 2307/748 : Releasability
• CPC Class Codes: B32B 2307/75 : Printability
• CPC Class Codes: B32B 2311/24 : Aluminium
• CPC Class Codes: B32B 2323/046 : LDPE, i.e. low density polyethylene
• CPC Class Codes: B32B 2323/10 : Polypropylene
• CPC Class Codes: B32B 2439/00 : Containers; Receptacles
• CPC Class Codes: B32B 2439/40 : Closed containers
• CPC Class Codes: B32B 2439/46 : Bags
• CPC Class Codes: B32B 2439/62 : Boxes, cartons, cases
• CPC Class Codes: B32B 2439/70 : Food packaging
• CPC Class Codes: B32B 27/065 : of foam
• CPC Class Codes: B32B 27/08 : of synthetic resin
• CPC Class Codes: B32B 27/10 : of paper or cardboard
• CPC Class Codes: B32B 27/32 : comprising polyolefins comprising vinyl (co)polymers or acrylic (co)polymers B32B27/30
• CPC Class Codes: B32B 27/327 : comprising polyolefins obtained by a metallocene or single-site catalyst
• CPC Class Codes: B32B 29/00 : Layered products comprising a layer of paper or cardboard
• CPC Class Codes: B32B 29/007 : next to a foam layer
• CPC Class Codes: B32B 29/06 : specially treated, e.g. surfaced, parchmentised
• CPC Class Codes: B32B 37/10 : characterised by the pressing technique, e.g. using action of vacuum or fluid pressure
• CPC Class Codes: B32B 37/153 : at least one layer is extruded and immediately laminated while in semi-molten state
• CPC Class Codes: B32B 5/18 : characterised by features of a layer of foamed material
• CPC Class Codes: B32B 5/20 : foamed in situ
• CPC Class Codes: B32B 5/26 : another layer next to it also being fibrous or filamentary relative arrangement of fibres or filaments of different layers B32B5/12
• CPC Class Codes: B32B 7/04 : Interconnection of layers
• CPC Class Codes: B32B 7/12 : using interposed adhesives or interposed materials with bonding properties
• CPC Class Codes: B65B 9/20 : the webs being formed into tubes in situ around the filling nozzles
• CPC Class Codes: B65D 65/40 : Applications of laminates for particular packaging purposes B65D1/0215, B65D1/28, B65D3/22, B65D5/0281, B65D5/563, B65D9/30, B65D29/02, B65D31/02, B65D75/26, B65D77/2024, B65D81/1275, B65D81/3811, B65D81/3823, B65D81/3834, B65D81/3846, B65D81/3858, B65D81/3874, B65D81/3886, B65D81/3897 take precedence; laminates per se or laminated packages characterised by the composition or
• CPC Class Codes: B65D 85/72 : for edible or potable liquids, semiliquids, or plastic or pasty materials

Abstract

Described herein are laminated packaging materials comprising foamed cellulose, their use in manufacturing packaging containers, for use in packaging of food products.

Claims

1. A packaging material for a packaging container for liquid or semi-liquid food, comprising a decor layer which on one side of the decor layer has a bulk layer having a density of less than 700 kg/m3 and foamed cellulose of at least 25% thickness of the bulk layer, which on the side opposite the decor layer has a barrier layer, which on the side opposite the bulk layer has a heat-sealable layer.

2. The packaging material according to claim 1 comprising an adhesive between the heat-sealable layer and the barrier layer.

3. The packaging material according to claim 1 comprising a laminate layer between the bulk layer and the barrier layer.

4. The packaging material according to claim 1 comprising an additional layer between the decor layer and the bulk layer.

5. The packaging material according to claim 4, wherein the additional layer is a paper or paperboard layer or an oriented polymer film.

6. The packaging material according to claim 5, wherein the additional layer is a paper layer having a grammage of at least 20 g/m².

7. The packaging material according to claim 4, comprising a binding layer between the additional layer and the bulk layer.

8. The packaging material according to claim 1, wherein the bulk layer has a density from 100 to 600 kg/m³.

9. The packaging material according to claim 1, wherein the bulk layer has a surface weight grammage of at least 20 g/m².

10. The packaging material according to claim 1, wherein the decor layer is selected from heat-sealable polyolefin layer(s) selected from the group consisting of low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), ultra low-density polyethylene (ULDPE) or LLDPE manufactured by using metallocene catalysts (mLLDPE) and blends of two or more thereof;

high density polyethylene (HDPE);

polypropylene or propylene co- or ter-polymers.

11. The packaging material according to claim 3, wherein the laminate layer and the heat-sealable layer are individually selected from the group consisting of low-density polyethylene (LDPE), high-density polyethylene (HDPE), medium-density polyethylene (MDPE), linear low-density polyethylene (LLDPE), very low-density polyethylene (VLDPE), ultra low-density polyethylene (ULDPE) or LLDPE manufactured by using metallocene catalysts (mLLDPE) and blends thereof;

and polypropylene or propylene co- or ter-polymers.

12. The packaging material according to claim 1, wherein the oxygen barrier is selected from the group consisting of aluminium foil and vapour deposition coated film, such as metallized or chemical vapour deposition coated film.

13. The packaging material according to claim 1, wherein the packaging material has a delamination strength between 60-300 J/m² as determined in accordance with TAPPI T569.

14. A packaging container manufactured from a packaging material according to claim 1, wherein the packaging container is a container for liquid or semi-liquid food product.

15. The packaging container according to claim 13, wherein the packaging container is a brick shaped packaging container, a gable top packaging container, a wedged-shape packaging container, a square-, rectangular- or octagonal-based packaging container, or a pouch.

16. A method of providing a packaging material for a packaging container for liquid or semi-liquid food, the method comprising:

providing a bulk layer having a density of less than 700 kg/m3 and comprising foamed cellulose;

providing a polyolefin decor layer on one side of the bulk layer;

providing a barrier layer on the side of the bulk layer opposite the decor layer;

providing a heat-sealable layer on the barrier layer, on the side opposite the bulk layer; and

the packaging material being produced by extrusion lamination and/or heat-pressure lamination.

17. The method according to claim 16, additionally comprising providing an adhesive between the heat-sealable layer and the barrier layer.

18. The method according to claim 16, additionally comprising providing a laminate layer between the bulk layer and the barrier layer.

19. The method according to claim 16, additionally comprising providing an additional layer between the decor layer and the bulk layer.

20. The method according to claim 19, wherein the additional layer is a paper or paperboard layer or an oriented polymer film.

21. The method according to claim 20, wherein the additional layer is a paper layer having a grammage of at least 20 g/m².

22. The method according to claim 16, additionally comprising providing a binding layer between the additional layer and the bulk layer.

23. The method according to claim 16, wherein the bulk layer has a density from 100 to 600 kg/m³.

24. The method according to claim 16, wherein the bulk layer has a surface weight grammage of at least 20 g/m².