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EP4382665A1 - Remplacement d'un composite feuille/papier par un papier à base de fibres pures - Google Patents

Remplacement d'un composite feuille/papier par un papier à base de fibres pures Download PDF

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Publication number
EP4382665A1
EP4382665A1 EP22212084.2A EP22212084A EP4382665A1 EP 4382665 A1 EP4382665 A1 EP 4382665A1 EP 22212084 A EP22212084 A EP 22212084A EP 4382665 A1 EP4382665 A1 EP 4382665A1
Authority
EP
European Patent Office
Prior art keywords
paper
water
primer layer
soluble
coating
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
EP22212084.2A
Other languages
German (de)
English (en)
Inventor
Uwe Hauschild
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.)
Coveris Flexibles & CoKg GmbH
Original Assignee
Coveris Flexibles & CoKg GmbH
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 Coveris Flexibles & CoKg GmbH filed Critical Coveris Flexibles & CoKg GmbH
Priority to EP22212084.2A priority Critical patent/EP4382665A1/fr
Priority to PCT/EP2023/083434 priority patent/WO2024120907A1/fr
Publication of EP4382665A1 publication Critical patent/EP4382665A1/fr
Pending legal-status Critical Current

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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
    • D21H19/00—Coated paper; Coating material
    • D21H19/80—Paper comprising more than one coating
    • D21H19/82—Paper comprising more than one coating superposed
    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • 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
    • D21H19/14—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12
    • D21H19/20—Coatings without pigments applied in a form other than the aqueous solution defined in group D21H19/12 comprising macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
    • D21H19/22—Polyalkenes, e.g. polystyrene
    • 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
    • D21H19/36—Coatings with pigments
    • D21H19/44—Coatings with pigments characterised by the other ingredients, e.g. the binder or dispersing agent
    • D21H19/54—Starch
    • 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
    • D21H19/80—Paper comprising more than one coating
    • D21H19/84—Paper comprising more than one coating on both sides of the substrate
    • 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

Definitions

  • the invention relates to a printable paper.
  • bags or sacks are often made from a film-paper composite, with the composite being folded during the bag or sack production process.
  • the paper has the strength optimized for the respective purpose and also bears the print that is essential for marketing.
  • a so-called "coating" is usually an application of a thick, viscous paint that dries to a thin layer and consists primarily of a high proportion of minerals (coating pigments). The coating defines the color of the unprinted paper and forms the surface on which the print is printed.
  • the plastic film that covers the print has a protective function for the print.
  • the film prevents, for example, damage to the print from physical and/or chemical environmental influences, within the scope of its capabilities. It also ensures that the line break that is often observed when folding the coated paper, i.e. when making bags or sacks, is prevented.
  • line break is understood to mean the breaking of the line along or in the vicinity of the fold or the fold edges, which leads to the typically white paper in the print becoming visible at the break points. For this reason, line break is also known as white edge break. The line break is easily visible visually and gives the viewer of the bag or sack a poorer impression of quality.
  • the invention has set itself the task of creating an improved paper, in particular for the production of bags or sacks.
  • the subject matter of the invention is therefore a paper, in particular purely fiber-based paper, the surface of which has a coating on one or both sides, characterized in that a water-soluble primer layer is applied to the coating.
  • the invention therefore relates to a paper packaging which is made from a paper according to the invention.
  • the invention therefore relates to a finishing process for a paper, in particular purely fiber-based paper, which has the following process steps, namely: providing a paper that has a coating on one or both sides, and applying a water-soluble primer layer to the coating.
  • the invention therefore relates to a use of a water-soluble primer layer on a coating of a paper, in particular a purely fiber-based paper, on the one hand to provide a water-based separability of the fiber material of the paper from the primer layer and on the other hand to at least reduce the tendency for the coating to break when the paper is used folded.
  • finishing process In a paper finishing process, one or more desired properties are given to a paper through appropriate process steps.
  • the paper with these properties can therefore be referred to as finished paper.
  • the finishing process is therefore a manufacturing process in which a paper is converted from an initial state with original properties to an intermediate state or final state with target properties.
  • the measures according to the invention have the advantage that the paper can be recycled in the most ecologically compatible way possible. is ensured because the primer layer as such is water-soluble and can therefore be removed or separated from the paper's fiber material in the most environmentally friendly way possible, i.e. preferably without the use of ecologically problematic chemicals, particularly preferably using only water. This makes a decisive contribution to the fact that the paper itself and an end product (e.g. bag or sack) made from the paper are considered to be highly recyclable. The primer layer therefore does not affect fiber recovery.
  • the primer layer which is also known as pre-primer (from the English word 'primer'), provides protection for the coating and at the same time improves the conditions for applying a further layer.
  • the primer layer has a dual effect here, namely, on the one hand, it prevents the coating from breaking when the paper is processed, or at least has a lasting effect so that the coating break is not visually perceived as disturbing, and on the other hand, it creates optimized conditions for a further layer build-up on the primer layer.
  • the primer layer forms a mechanical interface layer between the coating and a further layer or sequence of layers to be established on the primer layer.
  • the water-soluble primer layer has a combined effect, which is composed on the one hand of easier and more environmentally friendly recyclability and on the other hand of maintaining a visually desirable appearance of the final product made from the paper.
  • the water-soluble primer layer preferably has the property that after its application it covers and binds the surface of the coating and thus stabilizes the coating, in particular its surface, during further processing against the tendency to break that would otherwise be present. It is therefore particularly advantageous that the water-soluble primer layer after its application exhibits such plastic properties that the primer layer can be easily.
  • the primer layer is naturally also subjected to the deformation that is to be expected when the paper is processed, and can withstand it without breaking. This also ensures that the other layers applied to it remain coherent, and does so so effectively that any fine cracks or similar that may occur are no longer perceived as disturbing by the observer.
  • the water-soluble primer layer is a water-soluble polyvinyl alcohol varnish.
  • Polyvinyl alcohol is usually abbreviated to PVAL or sometimes PVOH. Analogous to the water-soluble property, the positive ecological effect also comes into play here that water and not an organic solvent is used as the solvent to make the water-soluble polyvinyl alcohol varnish ready for processing.
  • the use of the water-soluble polyvinyl alcohol varnish allows a desired oxygen barrier effect to be achieved in the paper itself, which has a positive effect on the shelf life of food (or other goods that react with oxygen) that are packaged using packaging made from the paper.
  • PVOH granules are processed with water as a solvent, whereby in the following discussion the proportion of PVOH granules and the proportion of water always add up to 100 parts.
  • a ratio of 11 parts (%) of PVOH granules and 89 parts (%) of water was found to be optimal for processability and for preventing the coating from breaking.
  • the desired effect, namely preventing the coating from breaking can also be achieved for a range of 9 to 11 parts (%) of PVOH granules.
  • the water-soluble polyvinyl alcohol varnish is manufactured by pouring the required amount of water (i.e., as stated, ideally 89 parts) into a heating vessel fitted with a stirrer, activating the stirrer, activating a heating device (a heating rod or similar) and heating the water to 90° Celsius.
  • a heating vessel fitted with a stirrer, activating the stirrer, activating a heating device (a heating rod or similar) and heating the water to 90° Celsius.
  • the required amount of PVOH granulate i.e., as stated, ideally 11 parts
  • a vessel lid is closed and a timer, which controls the operation of the heating device, is set to a heating period of 90 minutes. After this heating period has elapsed, the heating device is deactivated by the control of the timer.
  • the stirrer should continue to run with the kettle lid still closed to prevent skin formation on the surface of the liquid water-soluble polyvinyl alcohol varnish.
  • the paint produced as discussed above has a limited shelf life. Depending on the storage temperature, it should be used within 14-20 days. Therefore, the required quantity should only be produced shortly before the planned production. If a quantity of paint is to be stored temporarily for a short period of time, the corresponding containers must also have a lid. Metal cans must not be used for this purpose, as these are susceptible to rust.
  • the disposal of the remaining quantities or the rinsing water can be carried out via the normal sewage system, since the polyvinyl alcohol paint is neither toxic nor hazardous to water and is biologically degradable.
  • the application quantity When further processing the water-soluble polyvinyl alcohol varnish prepared as discussed above, the application quantity must first be considered or determined. In tests carried out by the applicant, a range of 1.5 +/- 0.5 g/m 2 was determined to be ideal.
  • the processing viscosity of the water-soluble polyvinyl alcohol varnish prepared as discussed above is in the range of 20-25 seconds determined according to DIN 53211, whereby a standardized flow cup with a 4 mm nozzle is used and the time until the originally filled flow cup is emptied is measured.
  • the water-soluble primer layer can preferably be applied using a first application device; in particular, the water-soluble primer layer is applied using an application device designed for gravure printing. This means that no fundamentally new tools are required in the production process for this process step. Instead, an available process technology is used, which in this case is not used to produce a print, as was previously the case, but to apply the water-soluble primer layer.
  • the further process step of smoothing has proven to be advantageous. This can be done, for example, after drying by polishing or the like.
  • the applied water-soluble primer layer is smoothed, in particular before it dries, using a smoothing device, in particular using a smoothing device designed for roller wheel smoothing. This measure ensures that any possible existing surface effects caused by the printing cylinder used in the gravure printing process are smoothed out, i.e. the surface of the primer is optimized for the later application of the actual print.
  • the water-soluble primer layer serves as a printing medium that bears a print, such as a motif or written information.
  • a print such as a motif or written information.
  • the print is usually made over the entire surface, with the motif and written information being printed together with a background that may be colored.
  • the conditions created by the preceding measures allow a high-quality print image to be created, whereby this print image remains essentially unaffected even after folding.
  • This protective layer also helps to prevent the coating from breaking because it mechanically stabilizes the layer structure on the paper.
  • the protective layer can even be formulated accordingly.
  • the protective layer can be a non-water-soluble (water-insoluble) protective layer, preferably a solvent-based two-component varnish. This measure helps to ensure that the end product made from the paper, the outside of which is formed by the non-water-soluble protective layer, can be used without degradation even in a humid environment.
  • the protective layer can also be a water-based protective layer, preferably a water-based varnish, as long as the water solubility is unproblematic or negligible during further use of the paper. This increases the degree of recyclability in an ecological sense.
  • the protective layer is preferably so transparent that the print is clearly visible with all its details and essentially unhindered.
  • the optical properties of the protective layer can However, it can also be realized in a matt finish, for which a matt varnish is used to replace the matt lamination that would otherwise be provided with a matt film.
  • the varnish forming the protective layer is applied by means of a printing process, preferably the gravure printing process already mentioned, in particular inline.
  • the paper is kraft paper, preferably for the production of folded paper packaging.
  • Kraft paper is the type of paper with the highest strength, which is required, for example, for the production of paper sacks.
  • the paper according to the invention is used in the production of a wide variety of paper packaging that is free of plastic film.
  • paper packaging can be a paper sack or paper bag, particularly preferably a block bottom bag.
  • Such paper packaging can also be an outer paper wrapper, in particular an outer paper wrapper for coffee.
  • the index finger and thumb are slightly moistened.
  • the test strip is then folded with the printed side facing inwards and the printed paper sections that are now lying on top of each other are subjected to pressure between the thumb and index finger at the test point and the thumb and index finger are moved back and forth so that the adjacent paper sections are moved relative to each other at the test point. It is important to note that only paper moves against paper and there is no relative movement between paper and finger. The stress that occurs The surface of the paper corresponds approximately to that which occurs during the manufacturing process of folded packaging using the paper.
  • the number of back and forth movements can be varied depending on the degree of stress. In comparative testing, this number of back and forth movements must of course be the same at the different test points.
  • each of the three test strips is assessed. If the three test points on a test strip show different appearances, only the test point whose appearance is "in the middle" is assessed. So if a first test point shows a maximum line break and a second test point shows a minimum line break, only the third test point, which shows a line break between the mentioned extremes, is assessed.
  • This evaluation scheme is based on the fact that the examiner determines his visual impression of the respective test center under the criteria mentioned and selects the appropriate category, i.e. classifies it or in other words the respective test center in one of the five categories
  • the inspector's work can also be supported in this context by a template to further facilitate the application of the test scheme and to further reduce the influence of subjectivity.
  • This template can show typical images of the five categories.
  • a template can also be used to define a defined viewing strip that extends to the left and right along the paper that is unfolded along the fold line and limits the viewing distance normal to the fold line.
  • a template can also be used to define a defined viewing window, which, in addition to the limited viewing distance normal to the fold line, also limits the viewing distance along the fold line.
  • a defined type of lighting can also be used for the visual assessment of the test points. In principle, the exact specification of the lighting is not important at all. Rather, the inspector should assess the various test points under identical lighting conditions.
  • the visual assessment can also be carried out without optical aids (e.g. a magnifying glass or a microscope), because the visual impression that a packaging makes in normal business transactions, e.g. on a shelf or in a shop, is usually determined by the consumer without such optical aids.
  • optical aids e.g. a magnifying glass or a microscope
  • a visual classification with an optical aid can be carried out in addition to the visual classification without optical aids.
  • the classification can also be carried out entirely with an optical aid.
  • the final determination of the coating break resistance under folding stress for the paper concerned is made by specifying the median of the values obtained according to the evaluation scheme given above. determined individual evaluation results from a maximum of nine test centers. The determined median indicates where the paper in question is placed along the scale between a minimum coating break resistance (category 4) and a maximum coating break resistance (category 0).
  • this method for determining the resistance to coating breakage under folding stress can also be carried out mechanically or automatically.
  • the folding and stressing are carried out mechanically, after which the paper is unfolded flat again and then subjected to a computer-assisted optoelectronic assessment, e.g. with the aid of an image-capturing device, in particular a still camera, with computerized classification of the digital images generated by the individual test centers and automated calculation of the median for the paper in question.
  • the measures according to the invention provide a paper which consists of a base paper coated with the coating, the water-soluble primer layer covering the coating, the print applied to the primer layer and the protective layer covering the print.
  • the integration of a film is advantageously completely dispensed with. This significantly improves the recyclability compared to known film-paper composite materials.
  • de-inking a process known as "de-inking” is used, which can be used to remove the print, possibly including the protective layer.
  • Water is used to separate the fiber mass from the remaining composite, which consists of the raw paper, the coating and the water-soluble primer, which is ecologically advantageous.
  • the invention provides a paper for folded packaging with sharp folded edges, the appearance of which is not or only negligibly affected by the folding and which nevertheless makes a decisive contribution to achieving good recyclability and the associated disposal in the paper recycling stream.
  • the Figure 1 shows a cross section through a section of a paper 1 according to the invention, which consists of a base paper 2, a coating 3 applied to one side of the first surface of the base paper 2, a water-soluble primer layer 4 applied to the coating 3, which consists of a water-soluble polyvinyl alcohol varnish, a print 5 applied to the primer layer 4 and a non-water-soluble varnish protective layer 6 covering the print 5.
  • the base paper 2 with the coating 3 applied to it is marked as coated base paper 7.
  • This paper 1 was prepared in accordance with the Figure 2 visualized manufacturing or finishing process 8.
  • the first block I can comprise all process steps for producing the base paper 2 including the application of the coating 3, i.e. providing a base paper 2 which has the coating 3 on one side.
  • the block I concerns the Provision of the coated base paper 7 on a first storage roll from which it is unwound for further finishing.
  • the water-soluble primer layer 4 is applied to the coating 3 using a gravure printing process.
  • the primer layer 4 After the primer layer 4 has been applied, it is still in a liquid or viscous state. Before it dries completely, the surface of a block III is smoothed, preferably by means of roller wheel smoothing.
  • the print 5 is applied to the primer layer 4 using a printing process in a block IV.
  • the print is covered with the lacquer protective layer 6 in a block V and then this lacquer protective layer 6 is also dried, for which a hot air dryer is again preferably used.
  • a further block VI summarizes all subsequent measures for further processing of the finished paper 1, such as storing the paper 1 on a second storage roll for further transport, separating it in processing units or further processing the paper 1 "inline" into a bag or sack, possibly up to filling it with a filling material and closing the bag or sack.
  • the described method 7 is carried out by means of a Figure 3 visualized device 9, which is a paper finishing plant, which is discussed in detail below.
  • the Figure 3 shows a first storage roll 10 on which the coated base paper 7 is wound and from where it is unwound for further finishing.
  • the coated base paper 7 passes through the device 9 in web form and is guided by a number of guide or deflection rollers 11 and is processed as it passes through three processing sections 13, 14 and 15 until it is finished as the Paper 1 is wound onto a second storage roll 12 (take-up roll) and made available for further processing.
  • the three processing sections 13 - 15 are essentially identical in structure. They have a printing unit 16, with the help of which a liquid or viscous application medium, which is stored in a container 17, is applied to the coated base paper 7. An application roller 18 rotates, which picks up the application medium and applies it to the web of coated base paper 7 that runs past it synchronously, with the coated base paper 7 being pressed against the application roller 18 by a pressure roller 19. A doctor blade 20 removes excess application medium.
  • the liquid polyvinyl alcohol varnish 21 is used as the application medium, which was prepared according to the general description and, when cured, forms the water-soluble primer layer 4 of the paper 1.
  • a liquid ink 22 is used as the application medium, which, when cured, forms the print 5 on the paper 1. It should be mentioned here that, of course, several colors can also be applied, for which the second processing section 14 can then have a number of sub-sections (not shown) corresponding to the number of colors.
  • a liquid solvent-based two-component varnish 23 is used as the application medium, which, when cured, forms the protective layer 6 of the paper 1.
  • the first processing section 13 also has a rotating doctor roller for smoothing the still wet polyvinyl alcohol varnish 21 applied to the coated base paper 7 in order to create an optimal surface for the subsequent application of the print 5.
  • the device 9 also has at least one hot air dryer 25 per processing section 13 - 15 for drying the respective application medium 21, 22 and 23, while the coated base paper 7 with the respective application medium 21, 22 or 23 as the top layer moves past the respective hot air dryer 25.
  • the line break along the fold lines 28 can be clearly seen with the naked eye on the left bag 26.
  • the fold line 28 appears here as a white stripe which is delimited by its edges 29 and 30 and which separates the otherwise homogeneously colored areas of the side fold from each other.
  • the fold line 28 appears here as a sharp fold edge that separates homogeneously colored areas of the side fold from each other.
  • the Figure 5 shows an enlarged (microscopic) image of a first section area 31 of the fold line 28 and its immediate surroundings for the Figure 4 bag 26 shown on the left.
  • the line break along the fold line 28 is clearly visible here through massive white zones between the edges 29 and 30. Adjacent to this, on the left side of edge 29 and on the right side of edge 30, massive disturbances in the originally homogeneous coloring of the conventional paper can be seen.
  • section area 31 i.e. section area 31 is specified as the test point
  • the test point can at best be rated with the number 4.
  • the coating break resistance of this conventional paper is therefore to be classified as inadequate.
  • FIG. 6 Compared to the Figure 5 show the Figure 6 an enlarged (microscopic) image of a second section area 32 of the fold line 28 and its surroundings for the Figure 4 bag 27 shown on the right.
  • a relatively small, but still visible line break can be seen, which extends clearly along the fold between the now perceptible, but relatively close edges 29 and 30.
  • These areas of the paper 1 therefore appear even in the enlarged view to be uniformly colored with smaller lightening zones, which, however, are not visible in normal viewing (the Figure 4 ) are not conspicuous.
  • the evaluation scheme for evaluating the section area 32 discussed in the general description is now also applied to the bag 27, i.e. if the section area 32 is specified as the test point, this test point can be rated with the number 1.
  • the coating break resistance is therefore sufficient here to produce a bag 27 for premium requirements using the paper 1 according to the invention.
  • section areas 31 and 32 were chosen to be the same size and to be located at the same location on the respective bags 26 and 27. Bags 26 and 27 were also folded on one and the same machine under identical processing parameters.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Paper (AREA)
EP22212084.2A 2022-12-07 2022-12-07 Remplacement d'un composite feuille/papier par un papier à base de fibres pures Pending EP4382665A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22212084.2A EP4382665A1 (fr) 2022-12-07 2022-12-07 Remplacement d'un composite feuille/papier par un papier à base de fibres pures
PCT/EP2023/083434 WO2024120907A1 (fr) 2022-12-07 2023-11-28 Remplacement d'un composite film/papier par du papier uniquement à base de fibres

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22212084.2A EP4382665A1 (fr) 2022-12-07 2022-12-07 Remplacement d'un composite feuille/papier par un papier à base de fibres pures

Publications (1)

Publication Number Publication Date
EP4382665A1 true EP4382665A1 (fr) 2024-06-12

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP22212084.2A Pending EP4382665A1 (fr) 2022-12-07 2022-12-07 Remplacement d'un composite feuille/papier par un papier à base de fibres pures

Country Status (2)

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EP (1) EP4382665A1 (fr)
WO (1) WO2024120907A1 (fr)

Citations (10)

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DE19718383A1 (de) * 1996-04-30 1997-11-06 Nippon Paper Co Ltd Gestrichenes Papier für Tiefdruck
US20030232211A1 (en) * 2002-06-17 2003-12-18 Appleton Papers Inc. Composite packaging materials and printable sheets, and methods of making
EP1591237A1 (fr) * 2004-04-27 2005-11-02 Mitsubishi Polyester Film GmbH Péllicule de polyester blanc, stérilisable à la vapeur, stratifiable par extrusion
EP1964969A1 (fr) * 2007-02-27 2008-09-03 Cargill, Incorporated Compositions de revêtement
EP2159069A1 (fr) * 2008-08-29 2010-03-03 Kba-Giori S.A. Procédé de vernissage de documents de sécurité, spécialement des documents de sécurité imprimés en creux tels que des billets de banque, et machine de vernissage pour l'effectuer
WO2019239334A1 (fr) * 2018-06-12 2019-12-19 Stora Enso Oyj Matériau d'emballage retriturable
DE102020112672A1 (de) * 2020-05-11 2021-11-11 Constantia Pirk Gmbh & Co. Kg Papierverpackungsmaterial mit verbesserter Resuspendierbarkeit der Cellulosefasern
US20220112663A1 (en) * 2020-10-09 2022-04-14 The Procter & Gamble Company Biodegradable and recyclable barrier paper laminate
EP4008836A1 (fr) * 2020-12-04 2022-06-08 Potatum Oy Procédé de fabrication d'une feuille revêtue, feuille revêtue, carton-caisse comprenant la feuille revêtue, récipient comprenant la feuille revêtue ou le carton-caisse et utilisation de la feuille revêtue
EP4074892A1 (fr) * 2021-04-13 2022-10-19 Tetra Laval Holdings & Finance S.A. Utilisation d'un substrat de papier à haute densité, substrat revêtu à haute densité et un matériau d'emballage stratifié et récipient d'emballage le comprenant

Patent Citations (10)

* Cited by examiner, † Cited by third party
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DE19718383A1 (de) * 1996-04-30 1997-11-06 Nippon Paper Co Ltd Gestrichenes Papier für Tiefdruck
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