US 12,539,695 B2Granted

Recyclable paper-based laminate and a beverage carton made therefrom

AssigneeSociete des Produits Nestle S.A.

InventorsJohannes Zimmer, Alexey Vishtal

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Abstract

The present invention concerns a paper-based barrier multilayer packaging material structure (1) being formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers: —a polymer dispersion coating (9) having a thickness of 1 to 10 μm, —a paperboard (8) having a grammage of between 120 g/m2 and 500 g/m2, —a water-based or solvent-less adhesive (7) having a thickness of 1 to 10 μm, —a barrier metallized paper layer (MBPL) having substance weight between 30-120 g/m2, preferably 45 to 90 g/m2 and a Water Vapour Transmission Rate (WVTR) of 10 to 0.1 g/m2/d, preferably a WVTR of 1.0 to 0.1 g/m2/d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) comprised between 100 and 0.1 cc/m2/d, measured at 23° C. and 50% RH, preferably an OTR comprised between 1.0 and 0.1 cc/m2/d. —a water-resistant polyolefin sealable coating (2) having a thickness of 10 to 50 μm, preferably of 25 to 35 μm.

Claims16

Dependent claims

A paper-based barrier multilayer packaging material structure being formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers:

(i) at least one layer of a polymer dispersion coating selected from the group consisting of:
ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinyl alcohol, ethyl-vinyl acetate, polyhydroxyalkanoate (PHA) and their copolymers, polyurethane (PU), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(butylene succinate-co-adipate) (PBSA), polylactic acid (PLA), and any mixture thereof, with or without a mineral filler, said dispersion coating layer having a thickness of 1 to 10 μm,
(ii) a paperboard having a weight of between 120 and 500 g/m2,
(iii) a layer of water-based or solvent-less adhesive selected from the group consisting of:
polyvinyl acetate (PVAc), polyurethane (PU), acrylic, polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness of between 1 and 10 μm,
(iv) a barrier metallized paper (MBPL) having a substance weight between 30 and 120 g/m2, a Water Vapor Transmission Rate (WVTR) of 10 to 0.1 g/m2/d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) between 100 and 0.1 cc/m2/d measured at 23° C. and 50% RH,
(v) a water-resistant polyolefin sealable coating selected from the group consisting of:
low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethylene ethyl-acrylate blend with low-density polyethylene (EEA-LDPE), said sealable coating having a thickness of 10 to 50 μm, and
wherein the total fiber content of said material structure is between 85% and 93% by weight,
wherein the interlayer adhesion strength measured between each of the aforementioned layers (i)-(v) is above 1.5 N/15 mm, up to 10 N/15 mm, and
wherein the barrier metallized paper layer (MBPL) has water absorption Cobb of 0 g/m2 measured at 60 min using standard test ISO 535, or its equivalents DIN EN 20535 or TAPPI T 441.

8 more elements

A package made of a paper-based barrier multilayer structure formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers:

(i) at least one layer of a polymer dispersion coating selected from the group consisting of:
ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinyl alcohol, ethyl-vinyl acetate, polyhydroxyalkanoate (PHA) and their copolymers, polyurethane (PU), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(butylene succinate-co-adipate) (PBSA), polylactic acid (PLA), and any mixture thereof, with or without a mineral filler, said dispersion coating layer having a thickness of 1 to 10 μm,
(ii) a paperboard having a weight of between 120 and 500 g/m2,
(iii) a layer of water-based or solvent-less adhesive selected from the group consisting of:
polyvinyl acetate (PVAc), polyurethane (PU), acrylic, polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness of between 1 and 10 μm,
(iv) a barrier metallized paper (MBPL) having a substance weight between 30 and 120 g/m2, a Water Vapor Transmission Rate (WVTR) of 10 to 0.1 g/m2/d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) between 100 and 0.1 cc/m2/d measured at 23° C. and 50% RH,
(v) a water-resistant polyolefin sealable coating selected from the group consisting of:
low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethylene ethyl-acrylate blend with low-density polyethylene (EEA-LDPE), said sealable coating having a thickness of 10 to 50 μm, and
wherein the total fiber content of said multilayer structure is between 85% and 93% by weight,
wherein the interlayer adhesion strength measured between each of the aforementioned layers (i)-(v) is above 1.5 N/15 mm, up to 10 N/15 mm, and
wherein the barrier metallized paper layer (MBPL) has water absorption Cobb of 0 g/m2 measured at 60 min using standard test ISO 535, or its equivalents DIN EN 20535 or TAPPI T 441.

8 more elements

A paper-based barrier multilayer packaging material structure being formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers:

(i) at least one layer of a polymer dispersion coating selected from the group consisting of:
ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinyl alcohol, ethyl-vinyl acetate, polyhydroxyalkanoate (PHA) and their copolymers, polyurethane (PU), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(butylene succinate-co-adipate) (PBSA), polylactic acid (PLA), and any mixture thereof, with or without a mineral filler, said dispersion coating layer having a thickness of 1 to 10 μm,
(ii) a paperboard having a weight of between 120 and 500 g/m2,
(iii) a layer of water-based or solvent-less adhesive selected from the group consisting of:
polyvinyl acetate (PVAc), polyurethane (PU), acrylic, polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness of between 1 and 10 μm,
(iv) a barrier metallized paper (MBPL) having a substance weight between 30 and 120 g/m2, a Water Vapor Transmission Rate (WVTR) of 10 to 0.1 g/m2/d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) between 100 and 0.1 cc/m2/d measured at 23° C. and 50% RH,
(v) a water-resistant polyolefin sealable coating selected from the group consisting of:
low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethylene ethyl-acrylate blend with low-density polyethylene (EEA-LDPE), said sealable coating having a thickness of 10 to 50 μm, and
wherein the total fiber content of said material structure is between 85% and 93% by weight,
wherein the bending stiffness of said material structure measured at 15° angle bend in machine direction according to ISO 2493 standard test procedure is between 200 and 700 mN, and
wherein the barrier metallized paper layer (MBPL) has water absorption Cobb of 0 g/m2 measured at 60 min using standard test ISO 535, or its equivalents DIN EN 20535 or TAPPI T 441.

8 more elements

A package made of a paper-based barrier multilayer structure formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers:

(i) at least one layer of a polymer dispersion coating selected from the group consisting of:
ethylene-acrylic or methacrylic acid copolymer, vinyl acetate, styrene acrylate, acrylic, modified polyvinyl alcohol, ethyl-vinyl acetate, polyhydroxyalkanoate (PHA) and their copolymers, polyurethane (PU), polybutylene adipate terephthalate (PBAT), polybutylene succinate (PBS), poly(butylene succinate-co-adipate) (PBSA), polylactic acid (PLA), and any mixture thereof, with or without a mineral filler, said dispersion coating layer having a thickness of 1 to 10 μm,
(ii) a paperboard having a weight of between 120 and 500 g/m2,
(iii) a layer of water-based or solvent-less adhesive selected from the group consisting of:
polyvinyl acetate (PVAc), polyurethane (PU), acrylic, polyvinyl alcohol (PVOH), ethylene vinyl alcohol (EVOH), butenediol vinyl alcohol co-polymer (BVOH), a starch-based adhesive, or a mixture thereof, said adhesive layer having a thickness of between 1 and 10 μm,
(iv) a barrier metallized paper (MBPL) having a substance weight between 30 and 120 g/m2, a Water Vapor Transmission Rate (WVTR) of 10 to 0.1 g/m2/d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) between 100 and 0.1 cc/m2/d measured at 23° C. and 50% RH,
(v) a water-resistant polyolefin sealable coating selected from the group consisting of:
low-density polyethylene (LDPE), linear low-density polyethylene (LLDPE), or an ethylene ethyl-acrylate blend with low-density polyethylene (EEA-LDPE), said sealable coating having a thickness of 10 to 50 μm, and
wherein the total fiber content of said multilayer structure is between 85% and 93% by weight,
wherein the bending stiffness of said multilayer structure measured at 15° angle bend in machine direction according to ISO 2493 standard test procedure is between 200 and 700 mN, and
wherein the barrier metallized paper layer (MBPL) has water absorption Cobb of 0 g/m2 measured at 60 min using standard test ISO 535, or its equivalents DIN EN 20535 or TAPPI T 441.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/547,273Filed 18 Feb 2022
Priority: EP 2115834422 Feb 2021
Published: US 2024/0165936 A123 May 2024
Granted: 3 Feb 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification29 codes

B32B 1/00
Layered products having a non-planar shape
B32B 29/005
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…
B32B 7/12
Interconnection of layers: using interposed adhesives or interposed materials with bonding properties
B32B 29/06
Layered products comprising a layer of paper or cardboard: specially treated, e.g. surfaced, parchmentised