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WO2025126090A1 - Papier et carton multicouche résistant aux liquides - Google Patents

Papier et carton multicouche résistant aux liquides Download PDF

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Publication number
WO2025126090A1
WO2025126090A1 PCT/IB2024/062541 IB2024062541W WO2025126090A1 WO 2025126090 A1 WO2025126090 A1 WO 2025126090A1 IB 2024062541 W IB2024062541 W IB 2024062541W WO 2025126090 A1 WO2025126090 A1 WO 2025126090A1
Authority
WO
WIPO (PCT)
Prior art keywords
ply
paper
paperboard
cellulose
sizing agent
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/IB2024/062541
Other languages
English (en)
Inventor
Susanne HANSSON
Katja LYYTIKÄINEN
Kaj Backfolk
Isto Heiskanen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Stora Enso Oyj
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
Publication of WO2025126090A1 publication Critical patent/WO2025126090A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B32B29/00—Layered products comprising a layer 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
    • 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
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/46—Applications of disintegrable, dissolvable or edible materials
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/60—Waxes
    • 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
    • D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
    • D21H17/62—Rosin; Derivatives thereof
    • 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
    • D21H19/10—Coatings without pigments
    • 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
    • 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
    • D21H27/30—Multi-ply
    • 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
    • B32B2307/726—Permeability to liquids, absorption
    • B32B2307/7265—Non-permeable
    • 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
    • B32B2439/70—Food packaging

Definitions

  • the present disclosure relates to repulpable and compostable liquid-resistant paper or paperboard suitable for use in disposable packaging containers, such as cups, boxes and trays, for food and beverages.
  • Liquid-resistance is an important property in many paper and paperboard applications.
  • Important examples include disposable packaging containers, such as cups, boxes and trays, for food and beverages.
  • Coating of paper and paperboard with plastics is often employed to combine the mechanical properties of the paper and paperboard with the barrier and converting properties of a plastic film, such as heat-sealability and shape forming.
  • plastics are undesirable from a sustainability and recycling point of view and negatively affects for example the repulping efficiency of pre- and post-consumer waste.
  • only few and less common plastics can be considered as compostable, especially home compostable.
  • plastic coating must typically be performed offline, which adds significantly to production time and cost.
  • Paper and paperboard for use in food and beverage packaging applications are often hydrophobized using hydrophobizing agents, also commonly referred to as sizing agents, to increase the resistance or repellence to wetting and penetration of water and other liquids into the cellulose-based substrate.
  • This hydrophobizing treatment generally referred to as sizing, is important to maintain the function of the substrate in wet or damp conditions.
  • Common internal sizing agents include alkyl ketene dimer (AKD), alkenyl succinic anhydride (ASA) and rosin.
  • Common surface sizing components include starch and starch derivatives, styrene maleic anhydrides, polyurethanes, styrene acrylates (SA) and acrylic copolymers.
  • Another problem associated with sizing agents is migration of the sizing chemicals which can result in deposits on the production machinery and/or finished products, limiting the technical feasibility and industrial applicability. Migration of sizing agents can also be detrimental from a food-safety point of view where each sizing agent has its own limitations of use.
  • the sizing agents may also affect the friction of the paper or paperboard, leading to too low friction. This may in turn result in difficulties with handling and/or converting of the paper and paperboard, and as an example in so-called telescope reels.
  • the solution should be industrially applicable, preferably avoiding issues with migration of sizing agents or too low friction, and the obtained paper or paperboard should be easy to convert and safe for food-contact usage.
  • a liquid-resistant multiply paper or paperboard comprising: a cellulose-based back ply, wherein said back ply comprises at least two different internal sizing agents in a total amount of 2-10 kg/ton, based on the total dry weight of the back ply; a cellulose-based top ply, wherein said top ply comprises a single internal sizing agent in a total amount of 0.1 -5 kg/ton, based on the total dry weight of the top ply, and wherein the total amount of internal sizing agent in the top ply is lower than in the back ply; and a first surface sizing layer applied on the outermost surface of the back ply, wherein the first surface sizing layer has a coat weight of 0.5-3 g/m 2 and comprises at least one hydrophobic surface sizing agent and at least one binder.
  • Paper generally refers to a material manufactured in thin sheets or rolls from the pulp of wood or other fibrous substances comprising cellulose fibers, used for writing, drawing, or printing on, or as a packaging material.
  • Paperboard generally refers to strong, thick paper or cardboard used for example in containers such as cups, boxes and trays for food and beverages, and/or other types of packaging.
  • Paper or paperboard may generally be a single-ply material, or a multiply material comprising two or more plies. Paperboard can either be bleached or unbleached paperboard, pigment coated or uncoated paperboard, and produced in a variety of thicknesses, depending on the end use requirements.
  • the multiply paper or paperboard of the present disclosure comprises at least two plies.
  • the paper or paperboard can be manufactured in a paper or paperboard machine adapted for manufacturing of multiply paper or paperboard.
  • Paper or paperboard machines for making multiply paper or paperboard are well known in the art.
  • the machine layout comprises a stock handling section, a wetend section, a press section, a drying section, and optionally a calendaring and/or coating section.
  • the plies may be formed individually, using different headboxes and laminated in a wet state, or formed together using a multiply headbox. If formed individually, the plies are typically laminated before entering the press section of the paper machine.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Paper (AREA)

Abstract

La présente invention concerne un papier ou carton multicouche résistant aux liquides, comprenant : une couche arrière à base de cellulose, ladite couche arrière comprenant au moins deux agents d'encollage internes différents dans une quantité totale de 2 à 10 kg/tonne, sur la base du poids sec total de la couche arrière ; une couche supérieure à base de cellulose, ladite couche supérieure comprenant un seul agent d'encollage interne dans une quantité totale de 0,1 à 5 kg/tonne, sur la base du poids sec total de la couche supérieure, et la quantité totale d'agent d'encollage interne dans la couche supérieure étant inférieure à celle dans la couche arrière ; et une première couche de collage de surface appliquée sur la surface la plus à l'extérieur de la couche arrière, la première couche d'encollage de surface ayant un poids de revêtement de 0,5 à 3 g/m2 et comprenant au moins un agent d'encollage de surface hydrophobe et au moins un liant. L'invention concerne en outre un procédé de fabrication d'un papier ou carton multicouche résistant aux liquides.
PCT/IB2024/062541 2023-12-13 2024-12-12 Papier et carton multicouche résistant aux liquides Pending WO2025126090A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2330553-5 2023-12-13
SE2330553A SE2330553A1 (en) 2023-12-13 2023-12-13 Liquid-resistant multiply paper and paperboard

Publications (1)

Publication Number Publication Date
WO2025126090A1 true WO2025126090A1 (fr) 2025-06-19

Family

ID=96056649

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2024/062541 Pending WO2025126090A1 (fr) 2023-12-13 2024-12-12 Papier et carton multicouche résistant aux liquides

Country Status (2)

Country Link
SE (1) SE2330553A1 (fr)
WO (1) WO2025126090A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005133258A (ja) * 2003-10-31 2005-05-26 Daio Paper Corp 段ボール用ライナー
US20160348318A1 (en) * 2015-05-29 2016-12-01 International Paper Company Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same
CN108301255B (zh) * 2018-01-02 2021-04-13 广西金桂浆纸业有限公司 一种高松厚冷藏包装纸及其制备方法
WO2022003430A1 (fr) * 2020-02-12 2022-01-06 Gpcp Ip Holdings Llc Structure stratifiée compostable
WO2022084835A1 (fr) * 2020-10-21 2022-04-28 Stora Enso Oyj Carton couché pour porte-récipients à boisson et porte-récipient à boisson correspondant
CN114457627A (zh) * 2022-02-25 2022-05-10 湛江晨鸣浆纸有限公司 一种防水防油白卡纸及其生产方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005133258A (ja) * 2003-10-31 2005-05-26 Daio Paper Corp 段ボール用ライナー
US20160348318A1 (en) * 2015-05-29 2016-12-01 International Paper Company Hydrophobic coated paper substrate for polymer emulsion topcoats and method for making same
CN108301255B (zh) * 2018-01-02 2021-04-13 广西金桂浆纸业有限公司 一种高松厚冷藏包装纸及其制备方法
WO2022003430A1 (fr) * 2020-02-12 2022-01-06 Gpcp Ip Holdings Llc Structure stratifiée compostable
WO2022084835A1 (fr) * 2020-10-21 2022-04-28 Stora Enso Oyj Carton couché pour porte-récipients à boisson et porte-récipient à boisson correspondant
CN114457627A (zh) * 2022-02-25 2022-05-10 湛江晨鸣浆纸有限公司 一种防水防油白卡纸及其生产方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
GAVELIN G: "2.5 Mäldlimning av kartongmassor", PAPP OCH KARTONG, SKOGSINDUSTRINS UTBILDNING I MARKARYD (SUM, ISBN: 91-7322-182-1 *

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