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WO2024223528A1 - Matériau d'emballage gaufré pour emballages fermés par torsion et son procédé de production - Google Patents

Matériau d'emballage gaufré pour emballages fermés par torsion et son procédé de production Download PDF

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Publication number
WO2024223528A1
WO2024223528A1 PCT/EP2024/061025 EP2024061025W WO2024223528A1 WO 2024223528 A1 WO2024223528 A1 WO 2024223528A1 EP 2024061025 W EP2024061025 W EP 2024061025W WO 2024223528 A1 WO2024223528 A1 WO 2024223528A1
Authority
WO
WIPO (PCT)
Prior art keywords
embossing
packaging
base layer
packaging film
packaging material
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/EP2024/061025
Other languages
German (de)
English (en)
Inventor
Wolfgang WEIβ
Thomas Schneider
Frank EGER
Andreas Fischer
Tobias Stein
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.)
Constantia Pirk GmbH and Co KG
Original Assignee
Constantia Pirk GmbH and Co KG
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 Constantia Pirk GmbH and Co KG filed Critical Constantia Pirk GmbH and Co KG
Publication of WO2024223528A1 publication Critical patent/WO2024223528A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/07—Embossing, i.e. producing impressions formed by locally deep-drawing, e.g. using rolls provided with complementary profiles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/04—Articles or materials wholly enclosed in single sheets or wrapper blanks
    • B65D75/06—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes
    • B65D75/10—Articles or materials wholly enclosed in single sheets or wrapper blanks in sheets or blanks initially folded to form tubes with the ends of the tube closed by twisting
    • 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
    • D21H19/72—Coated paper characterised by the paper substrate
    • D21H19/74—Coated paper characterised by the paper substrate the substrate having an uneven surface, e.g. crêped or corrugated 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
    • 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
    • D21H27/001—Release 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
    • D21H27/02—Patterned 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
    • D21H27/10—Packing paper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/26—Articles or materials wholly enclosed in laminated sheets or wrapper blanks

Definitions

  • the present invention relates to a packaging material, in particular for packaging foodstuffs.
  • the invention relates to so-called twist packaging, which is used, for example, to package sweets or the like.
  • Wax-coated paper is usually used to make the paper more flexible. In other words, these papers usually have wax coatings.
  • the wax makes the paper more flexible so that it adapts better to the contours of the product and does not tear. Wax usually comes from oil derivatives and is therefore a source of mineral oil contamination.
  • the use of wax is also viewed critically with regard to the recycling process.
  • the wax coating seals the surfaces so that they are watertight, which means that the water can no longer dissolve the fibers in the recycling process, which in turn means that the wax-coated paper can often only be recycled thermally.
  • recent discussions by the EU Commission have shown that wax coatings on paper should be listed as negative in terms of the recycling cycle.
  • the present invention is therefore based on the object of providing a paper-based and/or cellulose-containing, twistable packaging material which In particular, the use of wax components is avoided.
  • the invention relates to a cellulose-based packaging material or packaging film for packaging foodstuffs, in particular as twist packaging, wherein this packaging material has a base layer which extends in a longitudinal direction, a width direction perpendicular to the longitudinal direction and a thickness direction perpendicular to the longitudinal direction and the width direction, and wherein the base layer has a first surface which extends in the longitudinal direction and the width direction, and a second surface which extends in the longitudinal direction and the width direction and which is opposite the first surface, and wherein the base layer is made of paper and/or cellulose-containing material.
  • the base layer has at least in sections a structure and/or embossing such that a first section of the base layer can be rotated by at least 180° relative to a second section of the base layer with respect to at least one axis of rotation in order to form the twist packaging and preferably to form it without cracks.
  • packaging material and packaging film are used synonymously.
  • twisting is understood to mean that a first section of the base layer can be rotated by at least 180° relative to a second section of the base layer with respect to at least one axis of rotation in order to form the twist packaging without damage.
  • a twist packaging is a packaging in which one section of the packaging material is twisted against another section of the packaging material. twisted and/or twisted.
  • the extension of the packaging material or twist packaging in the thickness direction is significantly smaller than the extension in the longitudinal direction and/or the width direction.
  • the extension of the packaging material in the thickness direction is less than 5% of the extension in the width direction, preferably less than 3%, preferably less than 1% and preferably less than 0.5%.
  • the base layer and/or the material of the base layer preferably has a (particularly maximum) grammage which is between 15 - 70 g/m 2 and particularly preferably between 30 - 50 g/m 2 .
  • the base layer and/or the material of the base layer has a long fiber content of 50 - 100%, preferably 70 - 100%.
  • the base layer and/or the material of the base layer has a filler content of 0 - 30%.
  • the packaging material and/or the base layer has an extension in the longitudinal direction that is greater than 1 cm, preferably greater than 2 cm, preferably greater than 3 cm. In a further embodiment, the packaging material and/or the base layer has an extension in the longitudinal direction that is less than 30 cm, preferably less than 25 cm, preferably less than 20 cm, preferably less than 15 cm and preferably less than 10 cm.
  • the packaging material and/or the base layer has an extension in the width direction which is greater than 2 cm, preferably greater than 3 cm, preferably greater than 4 cm.
  • the packaging material has an extension in the width direction which is less than 40 cm, preferably less than 35 cm, preferably less than 30 cm, preferably less than 25 cm, preferably less than 20 cm and particularly preferably less than 15 cm.
  • the packaging material has an extension in the thickness direction that is greater than 15 pm, preferably greater than 20 pm, particularly preferably greater than 25 pm and especially preferably greater than 30 pm. This information refers in particular to the already embossed paper and/or the already embossed base layer.
  • the packaging material has an extension in the thickness direction that is less than 120 pm, preferably less than 100 pm and particularly preferably less than 80 pm. These extensions are measured in particular according to DIN EN ISO 534.
  • the packaging material has at least one material-inherent property whose value differs in MD (machine direction) from that in TD (transverse direction).
  • at least one of these material-inherent properties that differ in MD and TD is selected from a group that includes a modulus of elasticity, a breaking load elongation and a bending stiffness. This can, for example, ensure that the packaging material is easily deformable (twistable) in one direction, but remains comparatively stiff and dimensionally stable in another direction. It can also ensure that a product to be packaged (for example a food product) can be twisted into the packaging material without great effort and machine expenditure, but on the other hand the packaging material does not break or tear when the packaged product is removed.
  • the packaging material has a modulus of elasticity which in MD (machine direction) is between 3000 MPa and 10,000 MPa, preferably between 4000 MPa and 6000 MPa, and in TD (transverse direction) is between 1000 MPa and 6000 MPa, preferably between 1500 MPa and 3000 MPa.
  • the E-modulus value is therefore preferably reduced by the embossing.
  • the E-modulus in MD and/or TD is reduced by at least 20%, preferably by at least 40% and preferably by at least 70% and preferably by 90% compared to an unembossed version.
  • the E-modulus is reduced by a maximum of 90%.
  • the packaging material has a breaking load elongation which in MD is between 1.5% and 3.0%, preferably between 1.8% and 2.2% and in TD is between 6.0% and 9.0%, preferably between 6.5% and 8.0%.
  • the breaking load elongation is therefore preferably increased by the embossing.
  • the breaking load elongation in MD and/or TD is increased by at least 10%, preferably by at least 20% and preferably by at least 30% compared to an unembossed design.
  • the packaging material has a flexural rigidity which is between 2.0 mN and 6.0 mN in MD, preferably between 2 mN and 4 mN, and between 5.0 mN and 13.0 mN in TD.
  • the flexural rigidity is preferably reduced by at least 60%, preferably by at least 50% and preferably by at least 40% in MD compared to an unembossed version, and increased by at least 50%, preferably by at least 70% and preferably by at least 90% in TD.
  • the values were determined analogously to DIN EN ISO 2493-1.
  • a rotation (of a section of the packaging material relative to another section of the packaging material) of at least 180° is possible without the packaging material tearing.
  • a rotation of at least 360°, preferably of at least 540° and particularly preferably of at least 720° is possible.
  • crack-free means that the packaging material has no visible damage after the twisting process, particularly damage that can be seen with the naked eye, particularly on the surface.
  • the applicant was unable to detect any visible damage to the surface of a packaging material produced with the above-mentioned values, despite the mechanical stress on the packaging material during the twisting process.
  • fiber cracks may occur to a small extent in the base layer, these have no negative impact on the twisting process and do not lead to any visible damage to the surface in the form of cracks, holes, etc. These fiber cracks also do not affect the visual impression of the packaging.
  • crack-free means that marginal visible changes to the surface of the base material, for example in the form of microcracks, holes, etc., up to a maximum size of 1 mm are acceptable.
  • This axis of rotation particularly preferably runs transversely to the machine direction (TD). However, it would also be possible for it to run in another direction, particularly along the machine direction.
  • the packaging material is flexible.
  • the structure and/or embossing is distributed uniformly over the entire surface. However, it would also be possible to provide embossing only in the areas in which turning or twisting is to take place.
  • the structure is manufactured with the aid of at least one embossing cylinder.
  • the packaging material is wax-free.
  • the structure has a plurality of lines which preferably run parallel to one another.
  • the structure has an embossed pattern which is selected from a group of embossed patterns which includes worm embossing, linen embossing, line embossing, wave embossing, grid embossing, dot embossing, needle embossing, damask embossing, image embossing, lettering embossing, Breille embossing or combinations thereof.
  • embossed pattern which is selected from a group of embossed patterns which includes worm embossing, linen embossing, line embossing, wave embossing, grid embossing, dot embossing, needle embossing, damask embossing, image embossing, lettering embossing, Breille embossing or combinations thereof.
  • this embossing can spatially deform the material in order to increase its elasticity.
  • the material is preferably changed in a relief-like manner.
  • the lines can be straight or curved, for example snake-like.
  • a first group of lines to run in a first direction and a second group of lines to run in a second direction. These directions can be diagonal or perpendicular to each other.
  • the embossing has an embossing depth that is greater than 5 pm, preferably > 7 pm, preferably > 30, preferably > 40 pm and particularly preferably > 50 pm, and ⁇ 100 pm, preferably ⁇ 90 pm, preferably ⁇ 70 pm, preferably ⁇ 50 pm and particularly preferably ⁇ 25 pm.
  • the embossing depth could be between 5 and 100 pm, or between 50 pm and 90 pm, or between 40 and 70 pm, or between 30 pm and 50 pm, wherein it is particularly preferred that the embossing depth is between 7 and 25 pm.
  • embossing it is possible for the embossing to protrude in one direction of the material or in both directions.
  • the embossing can thus protrude in the thickness direction over both the first surface (2a) and the second surface (2b), but preferably protrudes over both surfaces.
  • a surface is understood to mean a flat area which is formed by the non-embossed areas of the base layer.
  • the embossing can be used/applied, for example, as steel/steel embossing, steel/rubber (PU), steel/paper.
  • a print and/or a finish is arranged on at least one surface and preferably on the first surface. All methods known from the prior art can be used as printing methods and preferably gravure printing, flexographic printing or digital printing. In the context of the invention, finishing is understood to mean everything that is visually or haptically perceptible to the consumer. In particular, the finishing is an overprint varnish or gloss varnish.
  • a sealing medium is arranged on the outer surface opposite the print.
  • the sealing medium is preferably a hot-sealing varnish and/or a cold-sealing coating. It is possible that this sealing coating can be activated thermally or by pressure.
  • the invention therefore proposes a method and a composition for To make paper twistable, and especially to make it twistable with modern machines, without using wax.
  • embossing or structuring the paper is suggested, as mentioned above. This embossing makes the paper elastic and flexible, making it ideal for twist applications. This has already been confirmed in extensive experiments. A machine test showed excellent results, even with high-speed twist machines.
  • a barrier layer is preferably arranged on the first surface.
  • This is preferably a barrier layer which contains at least one substance selected from a group comprising a metal, a semimetal, a metal oxide, a semimetal oxide, aluminum, copper, titanium, gold, silver, aluminum oxide (AlOx), silicon oxide (SiOx), or mixtures thereof.
  • the base layer comprises at least one, preferably two further layers in the form of primers.
  • This is preferably a pre-metallization primer, i.e. a primer which is applied below the metallization or barrier layer, and a post-metallization primer, i.e. a primer which is applied above the metallization or barrier layer.
  • a barrier lacquer layer in particular an oxygen barrier lacquer layer, is designed as a metallization primer.
  • This barrier layer can preferably provide the packaging material with barrier properties, in particular but not exclusively, against oxygen, water (vapour), aroma and/or fat.
  • This barrier layer can be applied.
  • the second surface preferably comprises a barrier varnish in addition to or as an alternative to the barrier layer.
  • the base layer comprises a coating on the second surface to prevent the contents from subsequently sticking to the packaging material and/or the base layer. In a preferred embodiment, this base layer is based on acrylate and/or ionomers and/or mixtures of these materials.
  • the base layer already comprises barrier properties such as, but not exclusively, against fat.
  • a coating is arranged on the carrier material. This coating is particularly preferably arranged over the entire surface.
  • the coating is selected from a group of coatings which includes sticky-release coatings, grease barriers and the like.
  • the base layer has a grammage that is greater than 10g/m 2 , preferably greater than 15g/m 2 , preferably greater than 20g/m 2 , preferably greater than 25g/m 2 , preferably greater than 30g/m 2 .
  • the base layer has a grammage that is less than 100g/m 2 , preferably less than 80g/m 2 , preferably less than 60g/m 2 , preferably less than 50g/m 2 , and preferably less than 40g/m 2 .
  • the base layer has a grammage of approximately 35g/m 2 .
  • the packaging film preferably has an overprint varnish.
  • This is particularly preferably an NC-based overprint varnish.
  • the overprint varnish preferably has a basis weight and/or a grammage that is greater than 0.3 g/m 2 , preferably greater than 0.4 g/m 2 , preferably greater than 0.5 g/m 2 , preferably greater than 0.6 g/m 2 , and preferably greater than 0.7 g/m 2 .
  • the overprint varnish has a basis weight and/or a grammage that is less than 2.0 g/m 2 , preferably less than 1.5 g/m 2 , preferably less than 1.0 g/m 2 , preferably less than 0.9 g/m 2 , and preferably less than 0.8 g/m 2 .
  • the packaging film has a printing ink. This is preferably an NC printing ink.
  • This printing ink preferably has a basis weight and/or a dry grammage that is greater than 0.5 g/m 2 , preferably greater than 0.7 g/m 2 , preferably greater than 1.0 g/m 2 , preferably greater than 1.3 g/m 2 , and preferably greater than 1.7 g/m 2 .
  • this printing ink has a basis weight and/or a dry grammage that is less than 10.0g/m 2 , preferably less than 16g/m 2 , preferably less than 4.0g/m 2 , preferably less than 3.0g/m 2 , and preferably less than 2.5g/m 2
  • the embossing of the packaging film is preferably carried out in one (particularly separate) operation.
  • the embossing is particularly preferably carried out using an embossing calender.
  • the present invention is further directed to a food product which is packaged with a packaging film and/or a packaging material of the type described above.
  • a first edge section of the packaging film or the packaging material is preferably twisted relative to a further section and in particular a central section in a first twisting section and preferably a second edge section of the packaging film and/or the packaging material is twisted relative to the central section in a second twisting section.
  • a receiving volume for the food product is formed between the first twisting section and the second twisting section.
  • the food product can be, for example, solid products such as sweets, candies and the like.
  • the present invention is further directed to a method for producing a packaging material and in particular a packaging material of the type described above.
  • a carrier material or a base layer (and in particular the above-mentioned base layer), in particular a carrier material (or a base layer) based on cellulose, is provided.
  • at least one print and/or at least one coating is arranged on this carrier material.
  • this print and/or this coating is arranged on at least one surface of the carrier material, which extends in a longitudinal direction and a width direction of the carrier material.
  • At least one structure is arranged and/or embossed into the carrier material.
  • the carrier material is transported in a predetermined transport direction.
  • this transport direction is also the longitudinal direction of the carrier material.
  • the printing and/or coating is applied during transport and in particular during a transport movement of the carrier material.
  • a transport direction of the carrier material is changed during the embossing process.
  • the carrier material is transported at a transport speed and/or embossing speeds are used which are between 50 and 500 m/min, preferably between 150 and 350 m/min.
  • the coating is selected from a group of coatings which includes sticky-release coatings, grease barriers and the like
  • the arrangement or embossing of the structure is carried out by means of at least one embossing cylinder, wherein the arrangement or embossing preferably takes place inline. It is possible that the arrangement or embossing takes place immediately after printing or coating. However, it would also be possible for the embossing and/or Structuring is done in a separate step
  • the embossing and/or structuring of the carrier material and/or the base layer takes place across its entire width.
  • At least one section of the packaging material is twisted relative to another section of the packaging material.
  • the present invention is further directed to the use of a packaging film and/or a packaging material with an embossed and/or structured layer, in particular an embossed and/or structured paper layer for packaging foodstuffs.
  • This layer is preferably made of a cellulose material.
  • the foods are selected from a group of foods which includes sweets, candies, chocolate and the like.
  • the foodstuffs have a volume which is between 0.25cm 3 and 1300cm 3 , preferably between 0.5cm 3 and 1000cm 3
  • the food items have a weight between 0.5 g/piece and 500 g/piece.
  • the present invention is further directed to a food product which is packaged in a packaging material of the type described above.
  • Fig. 1 is a representation of a twist packaging provided with a product
  • Fig. 2 is a schematic representation of a base layer of a packaging film
  • Fig. 3 is a perspective view of a structured base layer
  • Fig. 4 shows a layer structure of a packaging film.
  • Fig. 1 shows a representation of a twist packaging 50 provided with a product, here a candy.
  • a product here a candy.
  • This has a first packaging section 52 in which the product is packed or wrapped.
  • the reference number 54 designates a first end section of the packaging and the reference number 56 designates a second end section of the packaging.
  • the reference numerals 55 each identify twist areas which lie between the packaging section 52 on the one hand and the end sections 54 and 56 on the other. The twisting occurs in these sections.
  • Fig. 2 shows a view of the base layer. This extends here in a longitudinal direction L and in a width direction B that is perpendicular to the longitudinal direction. A thickness direction is perpendicular to the longitudinal direction and the width direction and therefore perpendicular to the plane of the figure in Fig. 2.
  • the reference numeral 22 designates a first section of the base layer 2, which is twisted relative to a second section 24 of the base layer when the product is packaged.
  • the reference numeral 26 designates a third section of the base layer, which is also twisted relative to the second section 24 of the base layer when the product is packaged.
  • the reference numerals 28 and 29 identify the twist sections in which the twisting or twisting is carried out.
  • the base layer is structured, as indicated by the hatching.
  • the sections 22, 24 and 26 also have a structure, at least partially or preferably.
  • the entire base layer is particularly preferably structured and/or embossed.
  • Fig. 3 shows an example of such a structure of the twist section 28. This has a large number of elevations 28a, which are evenly distributed over the surface of the twist section. As explained above, however, other designs of the twist section can also be selected.
  • Fig. 4 shows a schematic representation of a layer structure of a packaging film according to the invention. This has the base layer 2, which has a first surface 2a and a second surface 2b.
  • a coating 4 is arranged on the first surface 2a.
  • a print 6 can be arranged on the surface 2a or on the coating 4.
  • at least one further optional layer can also be arranged on the second surface 2b.
  • the elevations 28a shown in Fig. 3 advantageously extend in the thickness direction D shown in Fig. 4
  • Fig. 4 shows a further embodiment of a packaging film according to the invention.
  • a primer 32 is advantageously arranged on the coating 4.
  • a print 6 is also provided, which is advantageously arranged on the primer 32 but could also be arranged on the coating 4.
  • an overprint varnish 34 is also arranged on the print 6.
  • the reference numeral 38 designates an optional further primer, which is preferably arranged between the coating 4 and the base layer 2.
  • the reference number 42 designates a barrier coating and in particular a barrier varnish.
  • a further coating in particular a sticky release coating 44, is also provided, in particular on this barrier coating.
  • a sealing medium is preferably also provided.
  • this sealing medium 46 represents an external layer with respect to the packaging film.

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Abstract

Film d'emballage (1) à base de cellulose pour emballage alimentaire tel qu'un emballage fermé par torsion, ledit film d'emballage comportant une couche de base (2) qui s'étend dans une direction longitudinale (L), une direction de largeur (B) perpendiculaire à la direction longitudinale (L), et une direction d'épaisseur (D) perpendiculaire à la direction longitudinale (L) et à la direction de largeur (B), et la couche de base comportant une première surface (2a) qui s'étend dans la direction longitudinale (L) et dans la direction de la largeur (B), et une seconde surface (2b) qui s'étend dans la direction longitudinale (L) et dans la direction de la largeur (B) et qui est opposée à la première surface (2a), et la couche de base (2) étant produite à partir de papier et/ou de matériau contenant de la cellulose, caractérisé en ce que la couche de base (2) présente une structure et/ou un gaufrage au moins dans des sections de telle sorte qu'une première section (22) de la couche de base (2) puisse tourner d'au moins 180° par rapport à au moins un axe de rotation par rapport à une seconde section (24) de la couche de base afin de former ainsi l'emballage fermé par torsion, en particulier sans déchirement.
PCT/EP2024/061025 2023-04-28 2024-04-23 Matériau d'emballage gaufré pour emballages fermés par torsion et son procédé de production Pending WO2024223528A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102023111064.0 2023-04-28
DE102023111064.0A DE102023111064A1 (de) 2023-04-28 2023-04-28 Geprägtes Verpackungsmaterial für Twistverpackungen und Verfahren zu dessen Herstellung

Publications (1)

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WO2024223528A1 true WO2024223528A1 (fr) 2024-10-31

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Application Number Title Priority Date Filing Date
PCT/EP2024/061025 Pending WO2024223528A1 (fr) 2023-04-28 2024-04-23 Matériau d'emballage gaufré pour emballages fermés par torsion et son procédé de production

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