EP4198197A1 - Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche - Google Patents

Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche Download PDF

Info

Publication number
EP4198197A1
EP4198197A1 EP21216080.8A EP21216080A EP4198197A1 EP 4198197 A1 EP4198197 A1 EP 4198197A1 EP 21216080 A EP21216080 A EP 21216080A EP 4198197 A1 EP4198197 A1 EP 4198197A1
Authority
EP
European Patent Office
Prior art keywords
layer
aqueous composition
fibre material
pulp suspension
paper
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
EP21216080.8A
Other languages
German (de)
English (en)
Inventor
Piotr KOWALKIEWICZ
Robert RANISZEWSKI
Elisabeth SCHWAIGER
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.)
Mondi AG
Original Assignee
Mondi AG
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 Mondi AG filed Critical Mondi AG
Priority to EP21216080.8A priority Critical patent/EP4198197A1/fr
Publication of EP4198197A1 publication Critical patent/EP4198197A1/fr
Pending legal-status Critical Current

Links

Images

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
    • D21H27/30—Multi-ply
    • 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
    • D21H11/12—Pulp from non-woody plants or crops, e.g. cotton, flax, straw, bagasse
    • 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
    • D21H21/28—Colorants ; Pigments or opacifying 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

Definitions

  • the invention relates to a method for producing a multi-layered packaging paper or board.
  • the colour of recycled paper material per se is basically uncontrollable, at least without taking further measures.
  • paper products made of recycled fibre material may exhibit varying optical appearance, wherein a greyish colour is most common with paper products made of untreated, recycled fibre material. Because of this optical appearance, paper products like paper or board packaging products made of purely untreated recycled fibre material, are often deemed unacceptable by consumers.
  • Multi-ply paper products are basically being produced in two different ways.
  • One method is called multi-ply forming, wherein individual plies are formed separately using several headboxes, (pre)drying these distinct plies and joining them at different levels of water content.
  • Such individual plies may for example be fused in a wet state within a forming section of a paper machine. Separate plies may however also be pressed or glued together in various states of water content.
  • An alternative method for producing multi-layered paper products is the so-called multi-layer forming, wherein several stock suspensions of fibre material are brought together in one headbox and one multilayer web is initially formed in a paper machine and dried in multiple successive sections of the paper machine.
  • multi-layer method and devices used therefor are for example disclosed in EP 2 784 214 A1 .
  • the objective of the invention is to address the disadvantages of the prior art methods mentioned above, and to provide a more sustainable and cost-effective, novel method for producing a multi-layered packaging paper or board with no or at least no essential drawbacks regarding consumer acceptance.
  • the method for producing a multi-layered packaging paper or board comprises the steps
  • aqueous composition comprising 92 wt.% to 99,9 wt.% water and 0,1 wt.% to 8 wt.% of one or more water-soluble dye(s).
  • the first and second pulp suspensions may also be denoted stock suspensions. All solid materials added to the suspensions and the aqueous composition are of course added prior to feeding the corresponding suspensions and the aqueous composition to the multi-layer headbox.
  • multi-layer packaging papers and boards can be manufactured in more sustainable and cost-effective way as compared to prior art technology.
  • both the amount of virgin fibre material used to form the top layer as well as the overall amount of dye(s) can be lowered without substantial negative effects regarding the optical appearance of the packaging paper or board.
  • the same good results regarding masking the colour of the recycled fibre material of the bottom layer from shining through to the surface of the top layer can be achieved with substantially lower amounts of costly virgin fibre material and dye(s).
  • up to 40 % less virgin fibre material and up to 35 % less dye(s) are sufficient to achieve similar results as with the prior art technologies.
  • the dye(s) introduced by means of the separate, intermediate aqueous layer seem to exhibit a better optical coverage of the bottom ply containing recycled fibre material as compared to the dye(s) applied to dye the fibre material containing base suspensions of the prior art.
  • the first pulp suspension and second pulp suspension preferably may contain no dyes, respectively the aqueous composition may preferably be the sole material fed to the multi-layer headbox of the paper machine containing dye(s).
  • the amount of virgin fibre material necessary for effectively masking a shine-through of the recycled fibre material from the bottom ply can also be lowered.
  • the inventors surprisingly found, that despite the lower amount of virgin fibre material used within the method, the mechanical strength of the resulting packaging papers or boards also is at least comparable to the prior art products.
  • the separation of the virgin fibres containing top layer and the recycled fibres containing bottom layer by the intermediate, aqueous layer during drying brings about a better mechanical performance of the finished packaging paper or board. It seems, that this separation prevents or at least impedes a mixing of the virgin and recycled fibre material of the bottom and top layers, leading to a pure top ply/layer containing substantially only virgin fibre material.
  • This relatively pure top layer as produced by the present method basically seems to positively affect the mechanical properties of the overall, finished packaging paper or board, in particular causing enhanced mechanical strength even when applied in much lower amounts as compared to prior art technologies. While products produced with prior art technologies typically require top layer grammages of about 45 g/m 2 , packaging paper or board produced according to the present method merely require grammages of about 30 g/m 2 to exhibit similar mechanical strength.
  • the aqueous composition may be provided comprising 0,5 wt.% to 2 wt.% of the water-soluble dye(s).
  • concentration range for the dye(s) has proven to be particularly convenient, in particular regarding the processing within the paper machine.
  • the aqueous composition may be provided comprising one or more dye(s) exhibiting a brownish colour.
  • the optical appearance of the multilayer packaging paper or board can be shifted towards a quite familiar appearance associated with paper packaging products, thereby satisfying consumer acceptance.
  • the aqueous composition comprising at least one anionic or cationic dye.
  • anionic or cationic dye tends to ionically adhere to cellulose fibre material, such that a better dye fixation may be achieved.
  • cellulose fibre material may be convenient for the processing of the multi-layer web within the paper machine and may also be of advantage regarding the mechanical properties of the finished packaging paper or board product, in particular regarding its mechanical strength.
  • such cellulose fibre material of the aqueous composition may be provided comprising 60 wt.% to 100 wt.% recycled cellulose fibre material.
  • the cellulose fibre material of the aqueous composition may however also be provided comprising virgin cellulose fibre material. If the aqueous composition is provided comprising cellulose fibre material the term aqueous suspension may be used equally. If the aqueous composition does not contain any cellulose fibre material the term aqueous solution may be used equally.
  • first and second suspensions as well as the intermediate, aqueous composition may contain minor amounts of additives commonly applied in paper making, including wet strength agents, strength enhancing agents, starch, agents to introduce barrier functionalities, sizing agents and so on.
  • the virgin cellulose material of the first fibre material may be provided comprising 50 wt.% to 99,9 wt.% virgin cellulose fibres and 0,1 wt.% to 20 wt.% lignin.
  • the amount of virgin cellulose fibres and lignin may be varied by means of the chemical treatment used to prepare the virgin cellulose material, wherein depending on such chemical treatment the virgin cellulose material may contain up to 30 wt.% hemicelluloses.
  • Such virgin cellulose material has proven to be particularly useful for processing of the multi-layer web within the paper machine and for producing multi-layered packaging paper or board with properties that satisfy the requirements of the packaging industry.
  • the first fibre material may also comprise up to 30 wt.% synthetic fibres and/or fibre-like materials.
  • more than two pulp suspensions in addition to the aqueous composition may be fed the headbox to form the multi-layer web within the present method, in particular another pulp suspension may be fed to the multi-layer headbox to adjoin the bottom layer on the side opposite of the aqueous layer.
  • the first pulp suspension, the second pulp suspension and the aqueous composition may be fed to a 3-layer headbox.
  • the structural requirements for the equipment as well as the operational requirements of the method can be kept as simple as possible, therefore providing a more convenient and less error-prone way of producing multilayer packaging paper or board.
  • any special requirements on the packaging paper or board can be met by modifying the exact compositions of the first and second suspensions and the intermediate, aqueous composition if needed.
  • the initial processing of the multi-layer web it may be convenient to form and initially dewater it by means of a gap former of the paper machine.
  • a gap former of the paper machine any type of gap former may be used for forming and dewatering the multi-layer web, for example gap formers of roll and blade type or gap formers without blade may be used.
  • Gap formers in general harmonize well with multi-layer headboxes, in particular allowing high machine speeds and therefore high production rates.
  • the first pulp suspension and the aqueous composition may be fed to the multi-layer headbox in a first pulp suspension to aqueous composition weight-ratio of 4:1 to 2:1, preferably 4:1 to 2,5:1 per time unit.
  • a weight-ratio in the given range has proven to be suited very well for forming and further processing the multi-layer web within the method.
  • a grammage of the top layer or ply in the final dried condition of the multi-layered packaging paper or board may be set to 20 g/m 2 to 40 g/m 2 .
  • a grammage of the virgin fibre material containing top layer in this range is low compared with prior art technologies, without exhibiting negative effects regarding optical appearance and mechanical properties of the finished packaging paper or board.
  • the packaging paper or board can be produced in a more sustainable and also cost-effective way.
  • the grammage of the top layer/ply in the final dried condition of the multi-layered packaging paper or board may be set to 25 g/m 2 to 35 g/m 2 .
  • the method pertains to production of multi-layer packaging paper or board using multi-layer headbox technology, wherein by means of a multi-layer headbox multiple layers of feed material are formed and adjoined before subsequent dewatering, pressing and drying of the multiple adjoined layers within a paper machine.
  • Such procedure is schematically depicted in a very simplified way in Fig. 1 .
  • the method comprises providing a first pulp suspension 1 comprising 95 wt.% to 99,5 wt.% water and 0,5 wt.% to 5 wt.% of a first fibre material.
  • the first fibre material is thereby provided comprising 50 wt.% to 100 wt.% virgin cellulose material.
  • a second pulp suspension 2 is provided comprising 95 wt.% to 99,5 wt.% water and 0,5 wt.% to 5 wt.% of a second fibre material.
  • the second fibre material is thereby provided comprising 50 wt.% to 100 wt.% recycled fibre material.
  • an aqueous composition 3 is also provided.
  • the first pulp suspension 1 is fed to a multi-layer headbox 4 of a paper machine such as to form a top layer 5.
  • the second pulp suspension 2 is fed to the multi-layer headbox 4 of the paper machine such as to form a bottom layer 6.
  • the aqueous composition 3 is fed to the multi-layer headbox 4 of the paper machine in between the top layer 5 and the bottom layer 6 such as to form an intermediate, aqueous layer 7.
  • a multi-layer web 8 is thereby formed by means of the multi-layer headbox 4, which multi-layer web 8 comprises the top layer 5, the intermediate, aqueous layer 7, and the bottom layer 6.
  • top layer 5 and bottom layer 6 are in relation to the layer stacking in the finished multi-layer packaging paper or board in its dried condition rather than any orientation or positioning upon processing in the paper machine.
  • the dried top layer 5 will be the layer forming the visible outside of a paper or board packaging while the bottom layer 6 will form the inside layer of a packaging facing the packed product.
  • the relative layer orientation pertaining to "up” and “down” directions in the paper machine during processing and drying of the multi-layer web 8 may vary and change, since the multi-layer web 8 may be redirected and guided in different directions multiple times in a common paper machine configuration during processing/drying.
  • the method further comprises subsequent drying of the multi-layer web 8 by means of the paper machine.
  • any paper machine configuration can be used to dry the multi-layer web 8, wherein conventional paper machine configurations commonly comprise multiple, subsequent dewatering, pressing and drying steps.
  • the multi-layer web 8 is formed and initially dewatered by means of a gap former 9 of the paper machine.
  • a gap former 9 is only shown in part in Fig. 1 .
  • Such gap former 9 comprises at least a forming roll 10 and the paper web, within the present method the multi-layer web 8 is fed into a gap between two fabrics 11 acting as sieves.
  • any type of gap former 9 can be used for initial dewatering of the multi-layer web 8, such as for example a gap former of roll and blade type. It is possible however to also use bladeless type of gap formers or other types of gap formers known in the art.
  • the aqueous composition 3 is provided comprising 92 wt.% to 99,9 wt.% water and 0,1 wt.% to 8 wt.% of one or more water-soluble dye(s).
  • the aqueous composition 3 may be provided comprising 0,5 wt.% to 2 wt.% of the water-soluble dye(s).
  • the first pulp suspension 1 and second pulp suspension 2 may contain no dyes, respectively the aqueous composition 3 may preferably be the sole material fed to the multi-layer headbox 4 of the paper machine which contains dye(s).
  • the aqueous composition 3 may also be provided comprising one or more dye(s) exhibiting a brownish colour.
  • the aqueous composition 3 may be provided comprising at least one anionic or cationic dye.
  • aqueous composition 3 Based on 100 wt.% aqueous composition 3, up to 4 wt.% of the maximum 8 wt.% of the one or more water-soluble dye(s) of the aqueous composition 3 may be replaced by a cellulose fibre material. In other words, based on 100 wt.% of the one or more soluble dye(s), up to 50 wt.% of the one or more water-soluble dye(s) of the aqueous composition 3 may be replaced by the cellulose fibre material. In this context, such cellulose fibre material of the aqueous composition 3 may be provided comprising 60 wt.% to 100 wt.% recycled cellulose fibre material. The cellulose fibre material of the aqueous composition may however also be provided comprising virgin cellulose fibre material.
  • this virgin cellulose material of the first fibre material may especially be provided comprising 50 wt.% to 99,9 wt.% cellulose fibres and 0,1 wt.% to 20 wt.% lignin.
  • the virgin cellulose material of the first fibre material may also contain up to 30 wt.% hemicelluloses.
  • the first fibre material may comprise up to 30 wt.% synthetic fibres and/or fibre-like materials.
  • the first and second pulp suspensions 1, 2 as well as the aqueous composition 3 may also be provided with minor amounts of further ingredients, for example additives commonly applied in paper making, such as wet strength agents, strength enhancing agents, starch, agents to introduce barrier functionalities, sizing agents and so on. It will be appreciated by those having ordinary skill in the, that the providing of first and second pulp suspensions 1, 2 as well as the aqueous composition 3 of course includes respective mixing of water with all ingredients desired for the individual layers 5, 6, 7 prior to feeding the suspensions 1, 2 and composition 3 to the multi-layer headbox 4.
  • additives commonly applied in paper making such as wet strength agents, strength enhancing agents, starch, agents to introduce barrier functionalities, sizing agents and so on.
  • one or more additional pulp suspension(s) in addition to the first and second pulp suspensions 1, 2 may be fed to a correspondingly configured multi-layer headbox 4 to form a multi-layer web 8 with more than the three layers shown in the exemplary embodiment depicted in Fig. 1 .
  • another pulp suspension may be fed to the multi-layer headbox 4 to adjoin the bottom layer 6 on the side opposite of the aqueous layer 7.
  • the first pulp suspension 1, the second pulp suspension 2 and the aqueous composition 3 may be fed to a 3-layer headbox as depicted in the exemplary embodiment shown in Fig. 1 .
  • the multi-layer headbox 4 can be operated with varying slice openings and volumetric slice flows for the individual suspensions 1, 2 and the aqueous composition 3.
  • a person having ordinary skill in the art in this context can choose and set the individual slice parameters of the multi-layer headbox 4 for production of packaging paper or board with desired properties, hereby also taking into account specific paper machine configurations.
  • the feed slice speed (in m/s) is at least roughly the same for all suspensions and the aqueous composition fed to the multi-layer headbox, although the multi-layer headbox may also be operated with individual jet speeds at least slightly varying with respect to each other.
  • volumetric slice flow it may be convenient to feed the first pulp suspension 1 and the aqueous composition 3 to the multi-layer headbox 4 in a first pulp suspension 1 to aqueous composition 3 weight-ratio of 4:1 to 2:1, preferably 4:1 to 2,5:1 per time unit.
  • a typical volumetric slice flow of the aqueous composition 3 at the corresponding slice opening of the multi-layer headbox 4 for the aqueous composition 3 may for example be selected within a range of 15 l/s*m to 70 l/s*m.
  • a volumetric slice flow for the first pulp suspension 1 may be selected accordingly.
  • the unit l/s*m hereby designates litres per second and per meter width of the paper machine, wherein the latter at least roughly corresponds to meter width of the multi-layer web 8 formed and dried within the paper machine.
  • the first pulp suspension 1 and the aqueous composition 3 may be considered having the same density in good approximation.
  • Actual slice flows for all suspensions 1, 2 and the aqueous composition 3 of course have to be selected/adapted considering the corresponding respective slice openings for the suspensions and the aqueous composition, as well as the initial water content of the pulp suspensions 1, 2 and the aqueous composition 3.
  • Typical slice openings for first pulp suspension 1 may for example be selected in a range from 2 mm to 7 mm, a slice opening for the aqueous composition 3 may for example be set to 1 mm to 4 mm.
  • a final, total slice opening for both the first and second pulp suspensions 1, 2 as well as the aqueous composition 3 thus may for example be set to 4 mm to 15 mm.
  • top layer 5 containing the virgin fibre material it may be convenient to set a grammage of the top layer in its final dried condition of the multi-layered packaging paper or board to 20 g/m 2 to 40 g/m 2 , preferably to 25 g/m 2 to 35 g/m 2 .
  • the slice flow and slice opening for the second pulp suspension 2 of course may be varied widely, in particular dependent on the desired volumetric flow of the second pulp suspension 2, which primarily and preferably is used to set the desired total grammage of the finished multi-layered packaging paper or board, since this second pulp suspension 2 basically contains the recycled fibre material.
  • the grammage of the bottom layer 6 in its final, dried condition can thereby be set by varying related process parameters, for example the initial recycled fibre material content of the second pulp suspension 2, the slice opening and volumetric slice flow of the multi-layer headbox 4 selected for the second pulp suspension 2, as well as the subsequent dewatering, pressing and drying conditions in the paper machine used.

Landscapes

  • Paper (AREA)
EP21216080.8A 2021-12-20 2021-12-20 Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche Pending EP4198197A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21216080.8A EP4198197A1 (fr) 2021-12-20 2021-12-20 Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21216080.8A EP4198197A1 (fr) 2021-12-20 2021-12-20 Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche

Publications (1)

Publication Number Publication Date
EP4198197A1 true EP4198197A1 (fr) 2023-06-21

Family

ID=78957666

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21216080.8A Pending EP4198197A1 (fr) 2021-12-20 2021-12-20 Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche

Country Status (1)

Country Link
EP (1) EP4198197A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651092A1 (fr) * 1993-10-29 1995-05-03 Valmet Paper Machinery Inc. Système d'alimentation en pâte pour une caisse de tête à plusieurs couches et procédé pour l'opération d'une telle caisse de tête
WO1998017860A1 (fr) * 1996-10-18 1998-04-30 Valmet Corporation Systeme d'alimentation en pate pour caisse de tete multicouche et procede de fonctionnement d'une caisse de tete multicouche
WO1999040256A1 (fr) * 1998-02-09 1999-08-12 Valmet Corporation Application d'une couche d'adjuvant dans un ensemble formeur d'une machine a carton
WO2000066835A1 (fr) * 1999-04-30 2000-11-09 Kimberly-Clark Worldwide, Inc. Articles en papier et procede pour l'application d'un additif chimique adsorbable a des fibres cellulosiques
WO2004038101A1 (fr) * 2002-10-24 2004-05-06 M-Real Oyj Procede pour produire un produit fibreux
EP2267206A1 (fr) * 2009-06-09 2010-12-29 Buckeye Technologies Inc. Couche à cellulose teint, non tissé teinté et les procédés de fabrication
EP2270281A1 (fr) * 2009-06-25 2011-01-05 Kemira Germany GmbH Procédé de pulpe de teinture
EP2784214A1 (fr) 2013-03-28 2014-10-01 Valmet Technologies, Inc. Alimentation en eau pour caisse de tête multicouche
US20170284030A1 (en) * 2016-04-05 2017-10-05 Fiberlean Technologies Limited Paper and paperboard products
WO2018229333A1 (fr) * 2017-06-14 2018-12-20 Kemira Oyj Procédé d'augmentation des propriétés de résistance d'un produit de papier ou de carton
WO2020157609A1 (fr) * 2019-01-28 2020-08-06 Stora Enso Oyj Carton et procédé de production d'un carton

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0651092A1 (fr) * 1993-10-29 1995-05-03 Valmet Paper Machinery Inc. Système d'alimentation en pâte pour une caisse de tête à plusieurs couches et procédé pour l'opération d'une telle caisse de tête
WO1998017860A1 (fr) * 1996-10-18 1998-04-30 Valmet Corporation Systeme d'alimentation en pate pour caisse de tete multicouche et procede de fonctionnement d'une caisse de tete multicouche
WO1999040256A1 (fr) * 1998-02-09 1999-08-12 Valmet Corporation Application d'une couche d'adjuvant dans un ensemble formeur d'une machine a carton
WO2000066835A1 (fr) * 1999-04-30 2000-11-09 Kimberly-Clark Worldwide, Inc. Articles en papier et procede pour l'application d'un additif chimique adsorbable a des fibres cellulosiques
WO2004038101A1 (fr) * 2002-10-24 2004-05-06 M-Real Oyj Procede pour produire un produit fibreux
EP2267206A1 (fr) * 2009-06-09 2010-12-29 Buckeye Technologies Inc. Couche à cellulose teint, non tissé teinté et les procédés de fabrication
EP2270281A1 (fr) * 2009-06-25 2011-01-05 Kemira Germany GmbH Procédé de pulpe de teinture
EP2784214A1 (fr) 2013-03-28 2014-10-01 Valmet Technologies, Inc. Alimentation en eau pour caisse de tête multicouche
US20170284030A1 (en) * 2016-04-05 2017-10-05 Fiberlean Technologies Limited Paper and paperboard products
WO2018229333A1 (fr) * 2017-06-14 2018-12-20 Kemira Oyj Procédé d'augmentation des propriétés de résistance d'un produit de papier ou de carton
WO2020157609A1 (fr) * 2019-01-28 2020-08-06 Stora Enso Oyj Carton et procédé de production d'un carton

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Similar Documents

Publication Publication Date Title
FI75200B (fi) Foerfarande vid pappersframstaellningsprocess foer foerbaettring av egenskaper hos papperet, saerskilt dess retention.
CA3036442C (fr) Produit en papier ou en carton comprenant au moins un pli contenant une pate a haut rendement et son procede de production
US12366035B2 (en) Multilayer film comprising MFC
US5916417A (en) Method of making multi-ply paperboard sheet having layers of different fiber properties
FI126699B (en) Process for making paperboard
US8608905B2 (en) Method for producing fiber product
EP4105381B1 (fr) Produit de carton présentant de meilleures propriétés d'impression
CN111041892B (zh) 多层片纤维幅材的施胶方法及多层片纤维幅材的成形部
CN111434853B (zh) 包含旧纸纤维和草纤维的多层片的纸
EP4198197A1 (fr) Procédé de fabrication d'un papier ou d'un carton d'emballage multicouche
AU2022261651B2 (en) Printable, multi-layered paper for packaging and process for production thereof
EP4589068A1 (fr) Procédé de fabrication d'une bande de papier de doublure multicouche et papier de doublure multicouche
SK35998A3 (en) Multilayered tissue product with a ctmp inner layer, and the production of said product
FI104002B (fi) Monikerrosrainaus yksinkertaista perusmassasysteemiä käyttäen
US6299728B1 (en) Multi-ply paper
BR102022025403A2 (pt) Método para produzir um papel ou cartão de embalagem multicamadas
EP4551757A1 (fr) Revêtement multicouche avec pâte nssc lavée
WO2001029311A1 (fr) Procede de fabrication de papier et de carton en couches
BR102022025403B1 (pt) Método para produzir um papel ou cartão de embalagem multicamadas
US20240263401A1 (en) Multi-ply liner for use in corrugated board
EP4384395A1 (fr) Carton assymétrique
EP3540118B1 (fr) Machine à bande fibreuse et procédé de formation d'une bande multicouche
EP4636157A1 (fr) Procédé de formation d'une bande de carton multicouche et section de formation pour former une bande de carton multicouche, et chaîne de production de bande de fibres pour produire des bandes de carton multicouche
EP4675039A1 (fr) Procédé de production de carton-conteneurs
EP3947813B1 (fr) Utilisation de chélates métalliques comme application de surface pour l'abrasion et/ou la rigidité du taber, l'amélioration du papier et du carton

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

P01 Opt-out of the competence of the unified patent court (upc) registered

Effective date: 20230621

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20231218

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20251007