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WO2025141243A1 - Matériau compostable pour récipient, récipient fabriqué à partir de celui-ci et procédé de fabrication de matériau compostable pour récipient - Google Patents

Matériau compostable pour récipient, récipient fabriqué à partir de celui-ci et procédé de fabrication de matériau compostable pour récipient Download PDF

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Publication number
WO2025141243A1
WO2025141243A1 PCT/FI2024/050715 FI2024050715W WO2025141243A1 WO 2025141243 A1 WO2025141243 A1 WO 2025141243A1 FI 2024050715 W FI2024050715 W FI 2024050715W WO 2025141243 A1 WO2025141243 A1 WO 2025141243A1
Authority
WO
WIPO (PCT)
Prior art keywords
coating
layer
pbs
pha
fibrous sheet
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/FI2024/050715
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English (en)
Inventor
Heikki Korpela
Henrik BYGGMÄSTAR
Mats KÄLDSTRÖM
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.)
Walki Group Oy
Original Assignee
Walki Group Oy
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 Walki Group Oy filed Critical Walki Group Oy
Publication of WO2025141243A1 publication Critical patent/WO2025141243A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B32B29/02—Layered products comprising a layer of paper or cardboard next to a fibrous or filamentary 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
    • B32B23/00—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
    • B32B23/04—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 comprising such cellulosic plastic substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • 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
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L101/00—Compositions of unspecified macromolecular compounds
    • C08L101/16—Compositions of unspecified macromolecular compounds the macromolecular compounds being biodegradable
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
    • 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
    • B32B2255/02—Coating on the layer surface on fibrous or filamentary 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
    • B32B2255/12—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
    • B32B2255/26—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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/306—Resistant to heat
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/308—Heat stability
    • 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
    • B32B2307/30—Properties of the layers or laminate having particular thermal properties
    • B32B2307/31—Heat sealable
    • 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
    • B32B2307/716—Degradable
    • 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
    • B32B2307/716—Degradable
    • B32B2307/7163—Biodegradable
    • 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
    • B32B2307/724—Permeability to gases, adsorption
    • B32B2307/7242—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
    • 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
    • B32B2439/02—Open containers
    • 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
    • B32B2439/40—Closed containers
    • 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

  • Compostable material for a container a container made thereof and a method for manufacturing compostable material for a container
  • the present invention relates to compostable packaging material, a method for manufacturing the same and a drinking cup.
  • the fibre-based materials for containers such as packing paper or board are usually coated with a polymeric barrier layer(s) providing water vapor, grease and/or gas barrier.
  • a polymeric barrier layer(s) providing water vapor, grease and/or gas barrier.
  • Such polymer-coated paper or board is also used for disposable tableware, such as drinking cups.
  • Polyolefins such as low-density polyethylene (LDPE), are widely used for coating due to their good heat-sealability and water vapor barrier properties.
  • LDPE low-density polyethylene
  • a disadvantage of the usual polyolefins is, however, that they may remain undegraded in the nature.
  • the aim of the invention was to find an improved compostable polymer coating for fibrous material for containers without compromising the sealing and barrier properties, adhesion to the fibrous substrate and running speed of the paper or board extrusion coating machinery.
  • the first aspect of the invention is a compostable packaging material. Characteristic to said packaging material is given in claim 1.
  • the second aspect of the invention is a method of manufacturing a compostable material.
  • the characteristic steps of said method are given in claim 8.
  • FIG. 1 Further aspects of the invention are a disposable drinking cup, packaging materials for frozen and chill-food, fruits and vegetables, fish and meat, dried food and cereals and confectionery.
  • Outermost polymer layer as used herein means the outermost coating layer from the fibrous sheet.
  • Innermost polymer layer means the coating layer closest to the fibrous sheet, in direct contact of said sheet.
  • Inner or outer polymer layer as used here may refer to the middle layer i.e. the layer between the outermost and innermost layers of a coextruded 3-layer coating.
  • PBS Polybutylene succinate
  • PHA polyhydroxyalkanoate
  • PBS polyhydroxyalkanoate
  • PHA is produced from renewable raw materials.
  • PBS may be produced in whole or in part from renewable raw materials, depending on the quality of renewable raw materials.
  • This invention refers to PHA based polymers or its derivatives such as polyhydroxybutyrate (PHB), poly-3-hy- droxybutyrate (P3HB), poly-4-hydroxybutyrate (P4HB), polyhydroxyvalerate (PHV), polyhydroxyhexanoate (PHH), polyhydroxyoctanoate (PHO) and their copolymers.
  • PHB polyhydroxybutyrate
  • P3HB poly-3-hy- droxybutyrate
  • P4HB poly-4-hydroxybutyrate
  • PV polyhydroxyvalerate
  • PH polyhydroxyhexanoate
  • PHO polyhydroxyoctanoate
  • polyhydroxybutyrate is a polyhydroxyalkanoate (PHA).
  • P3HB polyhydroxybutyr- ate
  • P4HB poly-4-hydroxybutyrate
  • PV polyhydroxyvalerate
  • PH polyhydroxyhexanoate
  • PHO polyhydroxyoctanoate
  • This invention is based on surprising finding that PHA coextruded in combination with PBS allows producing a coated fibrous sheet with sufficient barrier properties, sufficient heat sealing, good adhesion and runnability of the coating machine.
  • the polymer coating is lying at least on the inner liquid-contact side of the cup or package.
  • a container may be provided with a coating on both sides of the fibrous sheet.
  • the coatings may be similar to each other or different.
  • the fibrous sheet may be paper or board, paper-board as well as cardboard.
  • the container as used herein may be for example a package for food or a disposable tableware such as a disposable drinking cup or plate, packaging materials for frozen and chill-food, fruits and vegetables, fish and meat, dried food and cereals and confectionery.
  • compostable means materials that will decompose in natural aerobic (composting) and anaerobic (landfill) environments.
  • the material described here is decomposed in home composting conditions (i.e. without active aeration, temperature control and/or mixing of the biomass).
  • PLA is certified industrially compostable e.g. to Australian and European Standards (AS4736 and EN 13432) whereas PBS is certified also home compostable.
  • Biodegradation of polymers, in this connection used for coating occurs when microorganisms metabolize the polymer to either assimilable compounds or to humus-like materials that are not harmful to the environment.
  • the polymers may be derived from renewable raw materials, or petroleum-based plastics (polymers) which contain additives.
  • PBS is biodegradable and compostable and may be of be derived from renewable raw materials or fossil (petroleum) origin.
  • PHA originates from renewable material.
  • Fibrous cellulosic material is known to decompose in a home compost.
  • adheresion means adhesion of the coating to raw fibrous sheet (paper or board) constituting the fibrous sheet. The aim is that an attempt to detach the coating results in breaking within the fibrous substrate layer, instead of the coating peeling off.
  • heat-sealability means that the polymer coating in softened or melted condition may be attached to an opposite surface of a material, which may be the same or another polymer or e.g. raw fibrous material (fibrous sheet).
  • the present invention relates to a compostable packaging material comprising
  • the expressions the innermost polymer coating layer or the innermost coating layer refer to the layer in direct contact with the fibrous sheet.
  • the expressions the outermost polymer coating layer or the outermost coating layer refer to the layer located as the outermost layer from the fibrous sheet. Both layers are applied by coextrusion.
  • the plastic layer (polymer layer) against the fibrous sheet must be PBS in order to ensure sufficient adhesion between the fibrous sheet and the coextruded coating. Sufficient adhesion to the fibrous sheet is not obtained with PHA as the innermost layer.
  • the coating weight of PBS as the innermost coating layer is 2 (gsm) g/m 2 or more. This is required for sufficient adhesion.
  • the total coating weight of polymer coating on one side of the fibrous substrate may be 10-30 (gsm) g/m 2 , such as 18-25 g/m 2 . This is required for sufficient barrier properties and enhances runnability and heat-sealability.
  • the amount of polymer per layer may be 2-28 (gsm) g/m 2 .
  • the expression multilayer coating refers to a coating comprising two or three coextruded polymer coating layers.
  • the drawback is sticking to the chill-roll.
  • the roll temperature must be raised above 50 °C to prevent sticking.
  • a 3-layer structure is produced with PBS on the surface.
  • the temperature of the chill-roll can be considered typical for extrusion coating (10-20 °C).
  • the packaging material comprises a structure: a. fibrous sheet (such as board); 10-40 % PBS as the innermost layer;
  • the packaging material comprises a structure: a. fibrous sheet (such as board); 10 - 70 % PBS as the innermost layer;
  • 90 - 30 % PHA as the outermost coating layer or b.
  • 90 - 30 % PHA as the outermost coating layer
  • 10 - 70 % PBS as the innermost layer
  • fibrous sheet such as board
  • 10 - 70 % PBS as the innermost layer
  • 90 - 30 % PHA as the outermost coating layer wherein the percentages refer to the percentual weight of said layer over the whole polymer coating.
  • the amounts are 20 - 40 % PBS and 80 - 60 % PHA.
  • the layers on the opposing sides of the fibrous sheet are different from each other.
  • a fibrous sheet may have a grammage (square weight) of 30 - 380 g/m 2 .
  • the packaging material may be 30 - 130 g/m 2 .
  • a coating here described may be produced by coextruding onto a fibrous substrate innermost, optionally a one middle and outermost coating layer.
  • the present invention relates also to a method of manufacturing a compostable material for container described here.
  • the method comprises coextrusion onto a fibrous sheet two or more layers of polymeric coating layers onto at least one side of said fibrous sheet.
  • the polymers may be coextruded as an outer coating layer or inner coating or both inner and outer coating of said fibrous sheet, depending on the desired use of the packaging material.
  • a coating is coextruded into direct contact with the fibrous sheet.
  • the structure of the coating and the packaging material are discussed in more detail in connection of the description the compostable packaging material.
  • the present invention further relates to a drinking cup of a packaging material manufactured as described here or of a packaging material described here.
  • PLA is characterized by so-called the edge weaving phenomenon, i.e. the edges of the polymer layer do not remain stable, but the edges sway in the transverse direction, causing uneven coating and spots on the edges where there is no polymer at all. This phenomenon is emphasized while the running speed increases.
  • the processing window of PLA is narrow, which has an effect on the runnability of the coextrusion of (PLA/PHA) structure as the edge weaving phenomenon of PLA? is visible also in the coextruded structure. This compromises the runnability of the PLA/PHA structure when compared to runnability of pure PHA.
  • One advantage of the coating and method described here is improved runnability of the coating machinery.
  • a sufficient amount of coextruded PHA provides stiffness to the coating thereby reducing the risk of angel hair formation in the die cutting process, and good barrier properties, whereas PBS improves the adhesion properties of the coating layer, heat-sealability and runnability in extrusion process.
  • One further advantage with the present method is that it is technically easier to use only one polymer in the same screw instead of a mixture of polymers. Then there is no need to invest in polymer feeders, as each polymer to be fed must have its own pipeline, including polymer suction (plastic suction) equipment and gravimetric dispensers.
  • the challenge of polymer mixtures may be the rheological differences of the polymer to be mixed. This can be seen as an inhomogeneous molten layer and thus also a polymer coating.
  • the polymers to be mixed are not necessarily chemically compatible.
  • ⁇ PHA in the middle coating layer or on the outermost coating layer improves water vapor barrier properties and reduces tendency for angel hair formation in die cutting process
  • PBS as the outermost coating layer eliminates the problem of sticking to the chill-roll and improves the runnability of the coextrusion coating due to better draw down properties.
  • PBS's motor load is significantly lower than PHA's, which reduces the risk that motor load becomes the productivity bottleneck.
  • the runnability of PBS is good, i.e. its melt strength (draw-down) and the stability of the edges of the melt layer are better than pure PHA, which enables the PBS/PHA structure to be coextrusion coated at a machine speed of 200 m/min or more.
  • the machine speed is 250 m/min or more, most preferably 300 m/min or more.
  • the high machine speed improves the economy of the manufacturing process.
  • a compostable polymer is extruded into direct contact with the fibrous sheet to be used as a packaging material. There is no need for a primer between the fibrous substrate and the coating of the invention. This simplifies the manufacturing process and reduces raw material costs.
  • PBS layer is preferably the innermost layer to improve adhesion of the coating layer to the underlying fibrous substrate.
  • the coatings on the opposite sides of the fibrous substrate may be similar or differ from each other, for instance a multilayer coating on one side and a monolayer coating on the opposite side.
  • a preferred embodiment of the invention is a fibrous board-based packaging material comprising coextruded innermost, middle and outermost coating layers, the innermost and the outermost layer comprising or consisting of PBS and the middle layer comprising or consisting of PHA.
  • the percentual weights are discussed above in connection of the packaging material.
  • the invention further provides improved containers made of the packaging material as described above.
  • PBS on the surface eliminates the problem of sticking to the chill- roll. If PHA is on the surface, the roll temperature must be > 50 °C, so that the coating does not stick to the roll and there is still a risk of sticking.
  • PBS improves the runnability of the coextrusion coating due to better draw down properties. It is possible to run PBS as mono extrusion at 350 m/min (20 gsm) without edge weaving and PHA at 180 m/min. In addition, PBS's motor load is significantly lower than PHA's, which reduces the risk that motor load became the productivity bottleneck.
  • Adhesion to the board substrate was studied as will be explained below. Half of A4 sized samples were cut and tested in machine direction. The corner of the sample was dipped (if necessary) to strong ethanol to enhance separation of the polymer coating at the beginning. The polymer coating was pulled apart from the substrate for and the force needed to separate the polymer coating from the substrate was evaluated.
  • Adhesion 1 The polymer coating separates easily, and the materials stay completely intact
  • Adhesion 2 It is clearly necessary to pull off the polymer coating with some force and the materials break easily (no fibres are attached to the coating)
  • Adhesion 3 Some force is needed to pull off the layers and the materials break slightly.
  • Adhesion 4 It is difficult to separate the polymer coating intact from the fibre substrate and the materials break almost completely (useful adhesion level for many applications such as cups)
  • Adhesion 5 It is impossible to separate the polymer coating from the fibre-based substrate without fibre tearing, they tear immediately (the fibre based substrate breaks throughout the area of coating).
  • PHA max rpm 30 1/min with 190 kg/h (185 °C), motor load as a bottle neck
  • PBS max rpm 55 1/min with 410 kg/h (270 °C)
  • motor load as a bottle neck WVTR (23C/50 RH), using ISO 2528:1995

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  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Laminated Bodies (AREA)

Abstract

L'invention concerne un matériau d'emballage compostable comprenant une feuille fibreuse et un revêtement coextrudé d'au moins deux couches de polymère compostable ainsi qu'un procédé de fabrication et d'utilisation d'un tel matériau.
PCT/FI2024/050715 2023-12-29 2024-12-19 Matériau compostable pour récipient, récipient fabriqué à partir de celui-ci et procédé de fabrication de matériau compostable pour récipient Pending WO2025141243A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20236447 2023-12-29
FI20236447A FI20236447A1 (en) 2023-12-29 2023-12-29 Biodegradable material for a container, a container made from the material and a method for manufacturing biodegradable material for a container

Publications (1)

Publication Number Publication Date
WO2025141243A1 true WO2025141243A1 (fr) 2025-07-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI2024/050715 Pending WO2025141243A1 (fr) 2023-12-29 2024-12-19 Matériau compostable pour récipient, récipient fabriqué à partir de celui-ci et procédé de fabrication de matériau compostable pour récipient

Country Status (2)

Country Link
FI (1) FI20236447A1 (fr)
WO (1) WO2025141243A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013182757A1 (fr) * 2012-06-08 2013-12-12 Upm-Kymmene Corporation Procédé et système de fabrication d'un matériau d'emballage, matériau d'emballage et emballage
US20140147604A1 (en) * 2011-07-12 2014-05-29 Stora Enso Oyj Heat-sealable biodegradable packaging material, a package or a container made thereof, and use of a resin in extrusion coating

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI99268C (fi) * 1996-04-04 1998-02-25 Upm Kymmene Oy Kerrosmateriaali
JP3701389B2 (ja) * 1996-06-19 2005-09-28 大日本印刷株式会社 生分解性積層体
WO1999063001A1 (fr) * 1998-05-30 1999-12-09 Daicel Chemical Industries, Ltd. Composition de resine de polyester biodegradable, composition de resine biodesintegrable et objets moules que ces compositions permettent de fabriquer
FI124410B (en) * 2012-10-26 2014-08-15 Stora Enso Oyj Method for the production of biodegradable packaging material, biodegradable packaging material and packaging or container thereof

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140147604A1 (en) * 2011-07-12 2014-05-29 Stora Enso Oyj Heat-sealable biodegradable packaging material, a package or a container made thereof, and use of a resin in extrusion coating
WO2013182757A1 (fr) * 2012-06-08 2013-12-12 Upm-Kymmene Corporation Procédé et système de fabrication d'un matériau d'emballage, matériau d'emballage et emballage

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