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EP4261346B1 - Production de papier ou de carton doublure - Google Patents

Production de papier ou de carton doublure Download PDF

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Publication number
EP4261346B1
EP4261346B1 EP22168616.5A EP22168616A EP4261346B1 EP 4261346 B1 EP4261346 B1 EP 4261346B1 EP 22168616 A EP22168616 A EP 22168616A EP 4261346 B1 EP4261346 B1 EP 4261346B1
Authority
EP
European Patent Office
Prior art keywords
furnish
pulp
dry weight
middle layer
layer
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.)
Active
Application number
EP22168616.5A
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German (de)
English (en)
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EP4261346A1 (fr
Inventor
Fredrik Nordström
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.)
Billerud AB
Original Assignee
Billerud AB
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
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Application filed by Billerud AB filed Critical Billerud AB
Priority to EP22168616.5A priority Critical patent/EP4261346B1/fr
Priority to FIEP22168616.5T priority patent/FI4261346T3/fi
Priority to PL22168616.5T priority patent/PL4261346T3/pl
Priority to US18/856,582 priority patent/US20250250745A1/en
Priority to EP23716337.3A priority patent/EP4508270A1/fr
Priority to PCT/EP2023/059830 priority patent/WO2023198916A1/fr
Publication of EP4261346A1 publication Critical patent/EP4261346A1/fr
Publication of EP4261346B1 publication Critical patent/EP4261346B1/fr
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Classifications

    • 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
    • D21H27/38—Multi-ply at least one of the sheets having a fibrous composition differing from that of other sheets
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
    • D21F11/02—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type
    • D21F11/04—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines of the Fourdrinier type paper or board consisting on two or more layers
    • D—TEXTILES; PAPER
    • D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
    • D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
    • D21F3/00—Press section of machines for making continuous webs of paper
    • D21F3/02—Wet presses
    • D21F3/0209—Wet presses with extended press nip
    • D21F3/0218—Shoe presses
    • 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
    • D21H11/02—Chemical or chemomechanical or chemothermomechanical pulp
    • D21H11/04—Kraft or sulfate pulp
    • 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
    • D21H11/08—Mechanical or thermomechanical pulp
    • 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
    • D21H11/10—Mixtures of chemical and mechanical pulp
    • 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
    • D21H11/14—Secondary fibres

Definitions

  • the present disclosure relates to the field of production of paper- and linerboard.
  • a machine for producing multi-layered paper- or linerboard has different sections.
  • furnishes are prepared from pulps and additives (added to improve properties such as retention, dewatering and strength).
  • a multi-layered web is then formed from the furnishes.
  • the multi-layered web is dewatered in the press section and dried in the drying section. Downstream the drying section, the multilayered web may be coated and/or calendered. When the multilayered web is both coated and calendered, calendering can be carried upstream or downstream the coating step(s) or even between coating steps.
  • the pulps that can be used in the paperboard machine include virgin pulps, recycled pulps (i.e. pulps prepared from recycled paper and/or paperboard) and broke pulps (pulps of fibres recycled from downstream portions of the same process). Further, virgin pulps are typically divided into chemical pulps and mechanical pulps. Sulfate (kraft) pulp and sulfite pulp are examples of chemical pulp. Groundwood pulp, thermomechanical pulp (TMP) and chemi-thermomechanical pulp (CTMP) are examples of mechanical pulp. All these pulps can be made from hardwood, softwood or mixtures thereof. Further, the pulps can be bleached or unbleached.
  • virgin pulps are typically divided into chemical pulps and mechanical pulps.
  • Sulfate (kraft) pulp and sulfite pulp are examples of chemical pulp.
  • Groundwood pulp, thermomechanical pulp (TMP) and chemi-thermomechanical pulp (CTMP) are examples of mechanical pulp. All these pulps can be made from hardwood, softwood or mixtures thereof. Further, the pulps can be
  • a furnish for a particular layer typically comprise a mixture of different pulps.
  • the properties of the final board product are not only a result of the pulp mixture of each furnish; they also depend on the degree of refining of the pulps, the types and amounts of additives and other operating conditions.
  • the process for making paperboard cannot be designed with only the final properties in mind; runnability in the paper machine and energy consumption must also be taken into consideration.
  • WO 2021/124040 A1 a light weight linerboard with a low CTMP content for corrugated board was produced, wherein the linerboard is having a high bending resistance and high compression strength.
  • a machine for producing a fibrous web comprising at least one, preferably two, double-felted shoe presses arranged one behind the other in the web running direction and at least one single-felted shoe press arranged behind the two double-felted shoe presses in the web running direction is disclosed.
  • CN 110 904 734 A a dark grain anticounterfeit cardboard produced from chemical pulp and hot-grinding pulp is disclosed.
  • the present invention aims to provide an efficient method of producing a paper- or linerboard of satisfactory properties.
  • the present invention provides a method of producing a paper- or linerboard having a grammage measured according to ISO 536:2019 of 250-310 g/m 2 and comprising a print layer, a middle layer and a back layer, wherein the middle layer is formed from a middle layer furnish comprising at least 40% by dry weight CTMP and at least 20% by dry weight broke pulp and the back layer is formed from a back layer furnish comprising an unbleached kraft pulp, said method comprising the step of subjecting a multi-layered web at a speed of at least 600 m/min to pressing in a press section comprising a first and a second double-felted shoe press nip arranged in series, wherein the total press impulse of the double-felted shoe press nips is at least 110 kPa*s, wherein CTMP and broke pulp together constitute at least 75% by dry weight of the middle layer furnish.
  • this press impulse is high, which increases the press dryness (i.e. the dryness of the multilayered web exiting the press section). As a result, less steam is consumed in the drying section.
  • the skilled person making paperboard is often reluctant to use high press impulses as they can densify the web to such an extent that inferior bending stiffness is obtained.
  • the selection of an unbleached pulp for the back layer furnish and the inclusion of CTMP in the middle layer furnish make the web of the method of the present disclosure relatively insensitive to high press impulses.
  • the press dryness is further increased by both shoe press nips being double-felted.
  • the present disclosure provides a method of producing a paper- or linerboard having a grammage measured according to ISO 536:2019 of 170-310 g/m 2 .
  • the paper- or linerboard comprises a print layer, a middle layer and a back layer. In one embodiment, the paper- or linerboard comprises more than one middle layer.
  • the middle layer is formed from a middle layer furnish comprising at least 25% by dry weight CTMP.
  • each middle layer furnish preferably comprise at least 25% by dry weight CTMP.
  • the CTMP of the middle layer(s) preferably has a Canadian Standard Freeness (CSF) measured according to ISO 5267-2:2001 of 525-625 ml, such as 550-600 ml.
  • CSF Canadian Standard Freeness
  • the CTMP may be subjected to refining. If the CSF is too low, dewatering is impaired and density increases. If the CSF is too high, strength properties may be insufficient.
  • the middle layer furnish comprises at least 40% by dry weight CTMP.
  • the middle layer comprises at least 20% by dry weight broke pulp, such as at least 30% by dry weight broke pulp.
  • the broke pulp of the middle layer furnish preferably has a Schopper-Riegler number (°SR) of less than 35 (such as 26-34), more preferably less than 33 (such as 27-32). To reach such a °SR, the broke pulp may be subjected to refining. In the present disclosure, °SR is measured according to ISO 5267-1:1999.
  • the CTMP and the broke pulp together constitute at least 75% by dry weight of the middle furnish.
  • the middle layer furnish may further comprises kraft pulp, such as softwood kraft pulp.
  • This kraft pulp may have a relatively low °SR, such as 18-25, preferably 18-23.
  • the head box consistency of the middle layer furnish may be 0.15% - 0.42%, such as 0.25% - 0.40%.
  • the back layer is formed from a back layer furnish comprising an unbleached kraft pulp.
  • the unbleached pulp of the back layer preferably has a °SR of 19-26, such as 20-25. To reach such a °SR, the unbleached pulp may be subjected to refining. If the °SR is too high, dewatering is impaired. If the °SR is too low, strength properties may be insufficient.
  • the unbleached pulp of the back layer is typically a softwood pulp.
  • the back layer furnish comprises at least 50% by dry weight of the unbleached pulp, such as at least 60% by dry weight of the unbleached pulp.
  • the back layer furnish may comprise broke pulp.
  • the broke pulp of the back layer furnish preferably has a °SR of less than 35 (such as 26-34), more preferably less than 33 (such as 27-32). To reach such a °SR, the broke pulp may be subjected to refining.
  • the unbleached pulp and broke pulp together constitute at least 80 % by dry weight of the back layer furnish, such as at least 90 % by dry weight of the back layer furnish.
  • the head box consistency of the back layer furnish may be 0.12% - 0.25%.
  • the print layer furnish preferably comprises a mixture of hardwood kraft pulp and softwood kraft pulp, such as a mixture of bleached hardwood kraft pulp and bleached softwood kraft pulp. However, the print layer may also be unbleached.
  • Each of the kraft pulps of print layer furnish preferably has a °SR of 21-29. To reach such a °SR, the kraft pulps are typically subjected to refining.
  • hardwood kraft pulp and softwood kraft pulp together constitute at least 80% by dry weight of the print layer furnish, such as at least 90% by dry weight of the print layer furnish.
  • the head box consistency of the print layer furnish may be 0.12% - 0.25%.
  • the above-mentioned furnishes form a multi-layered web in a forming section.
  • a top former may be arranged to aid the dewatering of the middle layer in the forming section.
  • the formation of the middle layer preferably comprises the use of a breast roll shaker.
  • the method of the present disclosure comprises the step of subjecting the multi-layered web to pressing in a press section at a speed of at least 600 m/min, such as at least 650 m/min, such as at least 700 m/min, such as at least 750 m/min.
  • the press section comprises a first and a second double-felted shoe press nip arranged in series.
  • the second double-felted shoe press nip is arranged downstream the first double-felted shoe press nip.
  • the line load of the second double-felted shoe press nip is higher than the line load of the first double-felted shoe press nip.
  • the total press impulse of the double-felted shoe press nips is at 110 kPa*s.
  • An upper limit may be 150 kPa*s or 200 kPa*s
  • the speed of the multi-layered web is typically lower, which means that the press impulse is at least 110 kPa*s.
  • the press section comprises a further nip arranged downstream the double-felted shoe press nips.
  • the further nip is preferably a non-felted nip or a single-felted nip, such as a non-felted hard nip or a single-felted shoe press nip.
  • its line load may be in the range of 25-100 kN/m, such as 30-75 kN/m, such as 30-60 kN/m.
  • the main purpose of such a hard nip is to smoothen the print side, which was in contact with a felt in the first and the second double-felted shoe press nip.
  • the felt is preferably contacting the back side.
  • the single-felted shoe press nip not only further dewaters the web, it also smoothens the print side, which - as mentioned above - was in contact with a felt in the first and the second double-felted shoe press nip.
  • the print layer of the paper- or linerboard may be coated with a composition comprising at least one pigment and at least one binder. Accordingly, the method of the present disclosure may further comprise a coating step.
  • the coating step may comprise a plurality of substeps, each applying a sublayer.
  • the print side of the paper- or linerboard of the present disclosure may have a PPS 1.0 roughness of below 2.0 ⁇ m, such as below 1.8 ⁇ m.
  • a lower limit for this PPS 1.0 roughness may be 0.8 ⁇ m.
  • PPS 1.0 roughness is measured according to ISO 8791-4:2013 (soft backing & 1000 kPa clamping pressure).
  • the method of the present disclosure comprises no calendering step, which typically saves bulk.
  • the density of the paper- or linerboard of the present disclosure may be below 810 kg/m 3 . If not coated with a pigment coating, the density may be below 800 kg/m3. In the present disclosure, density is measured according to ISO 534:2011.
  • a three-layer white-top linerboard was produced in a full-scale paperboard machine.
  • the layer design of the WTL was as follows: a print layer (58 g/m 2 ), a back layer (45 g/m 2 ), a middle layer (77 g/m 2 ) and a pigment coating (20 g/m 2 , applied onto the print layer).
  • NBHK bleached hardwood kraft pulp
  • NBSK bleached softwood kraft pulp
  • LC refining 50 and 120 kWh/tonne, respectively
  • rosin size 0.5 kg/tonne
  • alum 2 kg/tonne
  • strength agent cationic starch, 5 kg/tonne
  • retention starch 3 kg/tonne
  • retention polymer 75 g/tonne
  • silica 300 g/tonne
  • clay 55 kg/tonne
  • UBK unbleached softwood kraft pulp
  • broke pulp were mixed in a 75:25 dry weight ratio.
  • AKD 0.5 kg/tonne
  • alum 0.4 kg/tonne
  • strength agent cationic starch, 5 kg/tonne
  • retention starch 3 kg/tonne
  • retention polymer 75 g/tonne
  • silica 300 g/tonne
  • a middle layer furnish broke pulp, NBSK and CTMP were mixed in a 45:10:45 dry weight ratio. Before the mixing, the pulps were subjected to LC refining to obtain the following values: °SR 30 for the broke pulp; °SR 20 for the NBSK and CSF 580 ml for the CTMP.
  • AKD 0.5 g/tonne
  • alum 0.3 g/tonne
  • strength agent cationic starch, 4 kg/tonne
  • retention starch 3 kg/tonne
  • retention polymer 150 g/tonne
  • silica silica
  • the wire section In the wire section, 0.7 g/m 2 starch was sprayed to each of the print layer web and the back layer web for ply-bond strength. At the end of the wire section, the three individual webs were couched together to form a three-layered web. In the press section arranged downstream the wire section, the three-layered web was pressed in three nips; a first double-felted shoe press nip followed by a second double-felted shoe press nip and a hard nip. The line load of the first double-felted shoe press nip was 656 kN/m. The line load of the second double-felted shoe press nip was 828 kN/m.
  • the line load of the hard nip was 50 kN/m.
  • the web speed in the press section was 854 m/min, which means that the press impulse of the whole press section was 108 kPa*s and that the total press impulse of the double-felted shoe press nips was 104 kP*s.
  • the three-layered web was dried in a drying section (the steam consumption in this section was relatively low) and then coated in a coating section according to the following: in a first blade coater, 8.5 g/m 2 of a pigment coating composition was applied to the surface of the print layer to form a first coating layer; and in a second blade coater, 11.5 g/m 2 of a pigment coating composition was applied to the first coating layer to form a second coating layer.
  • the total (dry) coat weight on the print layer surface was 20 g/m 2 .
  • a very small amount ( ⁇ 0.3 g/m 2 ) of starch was applied to the surface of the back layer in the coating section.
  • the middle layer would have been a greater part of the whole board structure and the density would therefore have been lower. Further, the grammage would have been higher if the board was not pigment-coated.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Paper (AREA)

Claims (15)

  1. Procédé de production d'un papier ou d'un carton de couverture ayant un grammage mesuré selon la norme ISO 536:2019 compris entre 250 et 310 g/m2 et comprenant une couche d'impression, une couche intermédiaire et une couche dorsale, dans lequel la couche intermédiaire est formée à partir d'une pâte intermédiaire comprenant au moins 40 % en poids sec de CTMP et au moins 20 % en poids sec de pâte cassée et la couche dorsale est formée à partir d'une pâte dorsale comprenant une pâte kraft non blanchie, ledit procédé comprend l'étape consistant à soumettre une bande multicouche à une vitesse d'au moins 600 m/min à un pressage dans une section de presse comprenant une première et une seconde pince de presse à sabot doublement feutrée disposées en série, dans lequel l'impulsion de pression totale des pinces de presse à sabot doublement feutrées est d'au moins 110 kPa*s, dans lequel le CTMP et la pâte brisée constituent ensemble au moins 75 % en poids sec de l'article d'ameublement de la couche intermédiaire.
  2. Procédé selon la revendication 1, dans lequel la vitesse est d'au moins 650 m/min, telle qu'au moins 700 m/min, telle qu'au moins 750 m/min.
  3. Procédé selon la revendication 1 ou la revendication 2, dans lequel la charge de ligne de la seconde presse à sabot doublement feutrée est supérieure à la charge de ligne de la première presse à sabot doublement feutrée.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la consistance de la boîte de tête de la couche intermédiaire est comprise entre 0,15 % et 0,42 %, par exemple comprise entre 0,25 % et 0,40 %.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la consistance de la caisse de tête de la couche d'impression est comprise entre 0,12 % et 0,25 %.
  6. Procédé selon l'une des revendications précédentes, dans lequel la consistance de la boîte de tête de la couche arrière est comprise entre 0,12 % et 0,25 %.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'aliment de la couche intermédiaire comprend en outre au moins 30 % en poids sec de pâte à papier cassée.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'aliment de la couche intermédiaire comprend en outre de la pâte kraft.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel le matériau d'impression comprend un mélange de pâte kraft de feuillus et de pâte kraft de résineux.
  10. Procédé selon la revendication 9, dans lequel la pâte kraft de feuillus et la pâte kraft de résineux constituent ensemble au moins 80 % en poids sec de la couche d'impression, tel qu'au moins 90 % en poids sec de la couche d'impression.
  11. Procédé de l'une quelconque des revendications précédentes, dans lequel la couche arrière comprend en outre de la pâte brisée.
  12. Procédé selon la revendication 11, dans lequel la pâte kraft écrue et la pâte brisée constituent ensemble au moins 80 % en poids sec de l'aliment de la couche arrière, tel qu'au moins 90 % en poids sec de l'aliment de la couche arrière.
  13. Procédé selon l'une quelconque des revendications précédentes, dans lequel la formation de la couche intermédiaire comprend l'utilisation d'un secoueur de rouleaux de poitrine.
  14. Procédé selon l'une quelconque des revendications précédentes, dans lequel la section de pressage comprend une autre pince disposée en aval des pinces de pressage des chaussures doublement feutrées.
  15. Procédé selon la revendication 14, dans lequel l'autre pince est une pince dure ou une pince de presse à sabot simple.
EP22168616.5A 2022-04-14 2022-04-14 Production de papier ou de carton doublure Active EP4261346B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP22168616.5A EP4261346B1 (fr) 2022-04-14 2022-04-14 Production de papier ou de carton doublure
FIEP22168616.5T FI4261346T3 (fi) 2022-04-14 2022-04-14 Kartongin tai lainerikartongin valmistus
PL22168616.5T PL4261346T3 (pl) 2022-04-14 2022-04-14 Wytwarzanie tektury lub kartonu pokryciowego tektury falistej
EP23716337.3A EP4508270A1 (fr) 2022-04-14 2023-04-14 Production de carton ou de carton doublure
US18/856,582 US20250250745A1 (en) 2022-04-14 2023-04-14 Production of paper- or linerboard
PCT/EP2023/059830 WO2023198916A1 (fr) 2022-04-14 2023-04-14 Production de carton ou de carton doublure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22168616.5A EP4261346B1 (fr) 2022-04-14 2022-04-14 Production de papier ou de carton doublure

Publications (2)

Publication Number Publication Date
EP4261346A1 EP4261346A1 (fr) 2023-10-18
EP4261346B1 true EP4261346B1 (fr) 2024-11-27

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EP22168616.5A Active EP4261346B1 (fr) 2022-04-14 2022-04-14 Production de papier ou de carton doublure
EP23716337.3A Pending EP4508270A1 (fr) 2022-04-14 2023-04-14 Production de carton ou de carton doublure

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Application Number Title Priority Date Filing Date
EP23716337.3A Pending EP4508270A1 (fr) 2022-04-14 2023-04-14 Production de carton ou de carton doublure

Country Status (5)

Country Link
US (1) US20250250745A1 (fr)
EP (2) EP4261346B1 (fr)
FI (1) FI4261346T3 (fr)
PL (1) PL4261346T3 (fr)
WO (1) WO2023198916A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4134235A1 (fr) * 2021-08-11 2023-02-15 Billerud Aktiebolag (publ) Carton asymétrique
EP4134236A1 (fr) * 2021-08-11 2023-02-15 Billerud Aktiebolag (publ) Carton asymétrique
WO2025093394A1 (fr) * 2023-10-30 2025-05-08 Billerud Aktiebolag (Publ) Carton multicouche
EP4566818A1 (fr) * 2023-12-05 2025-06-11 Billerud Aktiebolag (publ) Panneau d'emballage de liquide
EP4575083A1 (fr) * 2023-12-19 2025-06-25 Billerud Aktiebolag (publ) Procédé de fabrication d'un carton multicouche
EP4575084B1 (fr) * 2023-12-19 2025-11-12 Billerud Aktiebolag (publ) Procédé de fabrication d'un carton multicouche
EP4589068A1 (fr) * 2024-01-16 2025-07-23 Mondi AG Procédé de fabrication d'une bande de papier de doublure multicouche et papier de doublure multicouche

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