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SE547118C2 - A method for manufacturing a paper or paperboard based packaging laminate - Google Patents

A method for manufacturing a paper or paperboard based packaging laminate

Info

Publication number
SE547118C2
SE547118C2 SE2330385A SE2330385A SE547118C2 SE 547118 C2 SE547118 C2 SE 547118C2 SE 2330385 A SE2330385 A SE 2330385A SE 2330385 A SE2330385 A SE 2330385A SE 547118 C2 SE547118 C2 SE 547118C2
Authority
SE
Sweden
Prior art keywords
paper
layer
range
metallization layer
pinholes
Prior art date
Application number
SE2330385A
Other languages
Swedish (sv)
Other versions
SE2330385A1 (en
Inventor
Erik Stenvall
Kaj Backfolk
Original Assignee
Stora Enso Oyj
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Stora Enso Oyj filed Critical Stora Enso Oyj
Priority to SE2330385A priority Critical patent/SE547118C2/en
Priority to PCT/IB2024/058552 priority patent/WO2025052243A1/en
Publication of SE2330385A1 publication Critical patent/SE2330385A1/en
Publication of SE547118C2 publication Critical patent/SE547118C2/en

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B38/00—Ancillary operations in connection with laminating processes
    • B32B38/0008—Electrical discharge treatment, e.g. corona, plasma treatment; wave energy or particle radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/10—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/32—Layered products comprising a layer of synthetic resin comprising polyolefins
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/002—Layered products comprising a layer of paper or cardboard as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B29/005—Layered products comprising a layer of paper or cardboard 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 another layer of paper or cardboard layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B29/00—Layered products comprising a layer of paper or cardboard
    • B32B29/06—Layered products comprising a layer of paper or cardboard specially treated, e.g. surfaced, parchmentised
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
    • B32B7/04—Interconnection of layers
    • B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J5/00—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers
    • C09J5/02—Adhesive processes in general; Adhesive processes not provided for elsewhere, e.g. relating to primers involving pretreatment of the surfaces to be joined
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/08—Oxides
    • C23C14/081—Oxides of aluminium, magnesium or beryllium
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C14/00—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material
    • C23C14/06—Coating by vacuum evaporation, by sputtering or by ion implantation of the coating forming material characterised by the coating material
    • C23C14/14—Metallic material, boron or silicon
    • C23C14/20—Metallic material, boron or silicon on organic substrates
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H11/00—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only
    • D21H11/16—Pulp or paper, comprising cellulose or lignocellulose fibres of natural origin only modified by a particular after-treatment
    • D21H11/18—Highly hydrated, swollen or fibrillatable fibres
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/02—Metal coatings
    • D21H19/08—Metal coatings applied as vapour, e.g. in vacuum
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
    • D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
    • D21H21/16—Sizing or water-repelling agents
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
    • D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
    • D21H27/10—Packing paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/04—Layered products comprising a layer of metal 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
    • B32B15/12—Layered products comprising a layer of metal 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 of paper or cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
    • B32B2037/1276—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives water-based adhesive
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
    • B32B37/14—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers
    • B32B37/24—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the properties of the layers with at least one layer not being coherent before laminating, e.g. made up from granular material sprinkled onto a substrate
    • B32B2037/246—Vapour deposition
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/12—Coating on the layer surface on paper layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/20—Inorganic coating
    • B32B2255/205—Metallic coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/26—Polymeric coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2255/00—Coating on the layer surface
    • B32B2255/28—Multiple coating on one surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/718—Weight, e.g. weight per square meter
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/72—Density
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7244—Oxygen barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2307/00—Properties of the layers or laminate
    • B32B2307/70—Other properties
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—Non-permeable
    • B32B2307/7246—Water vapor barrier
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/80—Medical packaging
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/10—Presence of inorganic materials
    • C09J2400/16—Metal
    • C09J2400/166—Metal in the pretreated surface to be joined
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2400/00—Presence of inorganic and organic materials
    • C09J2400/20—Presence of organic materials
    • C09J2400/28—Presence of paper
    • C09J2400/283—Presence of paper in the substrate

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Plasma & Fusion (AREA)
  • Thermal Sciences (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
  • Wrappers (AREA)

Abstract

The present invention relates to a method for manufacturing a paper or paperboard based packaging laminate, said method comprising:a) providing a paper or paperboard base layer,b) providing a metallized barrier paper layer comprising a barrier paper substrate having a first main surface and a second main surface and a metallization layer having a thickness in the range of 10-500 nm deposited on the first main surface,c) subjecting the metallization layer to a surface treatment process selected from the group consisting of corona treatment and plasma treatment, such that the surface treated metallization layer has a surface energy in the range of 35-75 mN/m, as determined by ISO 19403-2:2017,d) applying a water based adhesive composition to the surface treated metallization layer and/or the paper or paperboard base layer, and e) laminating the paper or paperboard base layer to the surface treated metallization layer using the water based adhesive composition, such that the adhesive composition forms an adhesive tie layer between the paper or paperboard base layer and the metallization layer of the metallized barrier paper layer.

Claims (35)

1. A method for manufacturing a paper or paperboard based packaging laminate, said method a) providing a paper or paperboard base layer, b) providing a metallized barrier paper layer comprising a barrier paper substrate having a first main surface and a second main surface and a metallization layer having a thickness in the range of 10-500 nm deposited on the first main surface, c) subjecting the metallization layer to a surface treatment process selected from the group consisting of corona treatment and plasma treatment, such that the surface treated metallization layer has a surface energy in the range of 35-75 mN/m, as determined by ISO 19403-2:2017, d) applying a water based adhesive composition to the surface treated metallization layer and/or the paper or paperboard base layer, and e) laminating the paper or paperboard base layer to the surface treated metallization layer using the water based adhesive composition, such that the adhesive composition forms an adhesive tie layer between the paper or paperboard base layer and the metallization layer of the metallized barrier paper layer.
2. The method according to any one of the preceding claims, wherein the paper or paperboard base layer has a grammage in the range of 20-800 g/m
3. The method according to any one of the preceding claims, wherein the paper or paperboard base layer has a density below 800 kg/m3, preferably below 700 kg/m3, more preferably below 600 kg/m
4. The method according to any one of the preceding claims, wherein the paper or paperboard base layer is a multiply paper or paperboard.
5. The method according to any one of the preceding claims, wherein the barrier paper substrate is a thin high-density paper such as a kraft paper, greaseproofpaper, glassine paper, tracing paper, translucent paper, transparent paper, machine glazed paper or parchment paper.
6. The method according to any one of the preceding claims, wherein the barrier paper substrate is a microfibrillated cellulose (MFC) film.
7. The method according to any one of the preceding claims, wherein the barrier paper substrate is coated with 0.5-8 g/m2 of a microfibrillated cellulose (MFC).
8. The method according to any one of the preceding claims, wherein the barrier paper substrate comprises an internal sizing agent in an amount of 50-10 000 g/tn, preferably 100-6000 g/tn, based on the total dry weight of the barrier paper substrate.
9. The method according to any one of the preceding claims, wherein the barrier paper substrate has a grammage in the range of 20-120 g/m2, preferably in the range of 25-120 g/m
10. The method according to any one of the preceding claims, wherein the barrier paper substrate has a density in the range of 700-1300 kg/mß, preferably in the range of 750-1200 kg/m
11. The method according to any one of the preceding claims, wherein the metallization layer comprises aluminum in the form of aluminum metal or an aluminum oxide, preferably in the form of an aluminum oxide.
12. The method according to any one of the preceding claims, wherein the metallization layer has a thickness in the range of 10-250 nm, preferably in the range of 25-200 nm, and more preferably in the range of 50-150 nm.
13. The method according to any one of the preceding claims, wherein the metallization layer has less than 20 pinholes/m2, preferably less than 15 pinholes/mz, and more preferably less than 10 pinholes/m2, as determined according to EN13676:
14. The method according to any one of the preceding claims, wherein the metallized barrier paper layer has a Gurley hill porosity of 30 000 s/100ml or higher, preferably 35 000 s/100ml or higher, or more preferably 40 000 s/100ml or higher, as measured according to standard ISO 5636/
15. The method according to any one of the preceding claims, wherein the surface treatment process is corona treatment.
16. The method according to claim 15, wherein the total corona treatment dose is in the range of 10-300 W*min/m2, preferably in the range of 10-250 W*min/m2, and more preferably in the range of 10-200 W*min/m
17. The method according to any one of claims 15-16, wherein the total corona treatment dose is achieved in two or more treatment steps.
18. The method according to any one of the preceding claims, wherein the corona treatment is performed on the metallization layer.
19. The method according to any one of the preceding claims, wherein the corona treatment is performed on the second main surface of the barrier paper substrate.
20. The method according to any one of the preceding claims, wherein the surface treated metallization layer has a surface energy in the range of in the range of 35-55 mN/m, and more preferably in the range of 37-50 mN/m, as determined according to ISO 19403-2:
21. The method according to any one of the preceding claims, wherein the surface treated metallization layer has a water contact angle below 50 degrees, preferably below 40 degrees, and more preferably below 30 degrees as determined according to ISO 19403-2:
22. The method according to any one of the preceding claims, wherein the surface treated metallization layer has less than 20 pinholes/m2, preferably less than 15 pinholes/mz, and more preferably less than 10 pinholes/mz, as determined according to EN13676:
23. The method according to any one of the preceding claims, further comprising subjecting the metallization layer to pinhole detection before and after the surface treatment process and adjusting the surface treatment process to keep the amount of pinholes in the surface treated metallization layer at less than 20 pinholes/mz, preferably less than 15 pinholes/må and more preferably less than 10 pinholes/m?
24. The method according to any one of the preceding claims, wherein the surface treated metallized barrier paper layer has a Gurley hill porosity of 30 000 s/100ml or higher, preferably 35 000 s/100ml or higher, or more preferably 40 000 s/100ml or higher, as measured according to standard ISO 5636/
25. The method according to any one of the preceding claims, wherein the water based adhesive composition comprises an adhesive polymer, preferably vinyl acetate ethylene copolymer.
26. The method according to any one of the preceding claims, wherein the water based adhesive composition is applied in the form of a dispersion, emulsion or solution of an adhesive polymer in an aqueous carrier.
27. The method according to any one of the preceding claims, wherein the water based adhesive composition has a solid content in the range of 10-70 wt%, preferably in the range of 15-65 wt%, at the point of application.
28. The method according to any one of the preceding claims, wherein the applied water based adhesive composition is subjected to at least partial drying before laminating the paper or paperboard base layer to the surface treated metallization layer using the water based adhesive composition.
29. The method according to claim 28, wherein the at least partial drying comprises removing at least 0.3 g/m2, preferably at least 0.5 g/m2, and more preferably at least 0.75 g/m2, of water from the applied water based adhesive com position.
30. The method according to any one of the preceding claims, wherein the adhesive tie layer has a grammage in the range of 1-10 g/m2, preferably in the range of 1.5-8 g/m
31. The method according to any one of the preceding claims, further comprising the step: f) applying at least one polymeric topcoat layer to at least one side of the laminate.
32. The method according to any one of the preceding claims, comprising the step: f) applying at least one polymeric topcoat layer to both sides of the laminate.
33. The method according to any one of claims 31-32, wherein the polymeric topcoat layer comprises a polyolefin layer, preferably a polyethylene layer.
34. The method according to any one of the preceding claims, wherein the obtained paper or paperboard based packaging laminate has an oxygen transmission rate (OTR), measured according to the standard ASTM F1927-20 at 50% relative humidity and 23 °C, of less than 5 cc/m2/24h, preferably less thancc/m2/24h, and more preferably less than 2 cc/m2/24h.
35. The method according to any one of the preceding claims, wherein the obtained paper or paperboard based packaging laminate has a water vapor transmission rate (WVTR), measured according to the standard ASTM F1249-20 at 50% relative humidity and 23 °C, of less than 5 g/m2/24h, preferably less than 3 g/m2/24h, and more preferably less than 2 g/m2/24h.
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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104595A (en) * 1983-11-07 1985-06-08 凸版印刷株式会社 Highly glossy corrugated board paper and its production
JP2012081761A (en) * 2011-11-28 2012-04-26 Sumitomo Forestry Crest Co Ltd Decorative paper, decorative plate, and method for manufacturing decorative laminated sheet
KR102064129B1 (en) * 2019-08-13 2020-01-08 (주)도심엔지니어링 종합건축사사무소 Complex sheet structure
US20200087497A1 (en) * 2017-01-11 2020-03-19 Dow Global Technologies Llc Polymer blends for use in multilayer structure and multilayer structures comprising the same
GB2597553A (en) * 2020-12-10 2022-02-02 Damarell Keith Laminated Packaging Material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60104595A (en) * 1983-11-07 1985-06-08 凸版印刷株式会社 Highly glossy corrugated board paper and its production
JP2012081761A (en) * 2011-11-28 2012-04-26 Sumitomo Forestry Crest Co Ltd Decorative paper, decorative plate, and method for manufacturing decorative laminated sheet
US20200087497A1 (en) * 2017-01-11 2020-03-19 Dow Global Technologies Llc Polymer blends for use in multilayer structure and multilayer structures comprising the same
KR102064129B1 (en) * 2019-08-13 2020-01-08 (주)도심엔지니어링 종합건축사사무소 Complex sheet structure
GB2597553A (en) * 2020-12-10 2022-02-02 Damarell Keith Laminated Packaging Material

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