EP4420870A1 - Fettresistenter verpackungsbeutel für nahrungsmittel und verfahren zur herstellung eines solchen beutels - Google Patents

Fettresistenter verpackungsbeutel für nahrungsmittel und verfahren zur herstellung eines solchen beutels Download PDF

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Publication number
EP4420870A1
EP4420870A1 EP24154369.3A EP24154369A EP4420870A1 EP 4420870 A1 EP4420870 A1 EP 4420870A1 EP 24154369 A EP24154369 A EP 24154369A EP 4420870 A1 EP4420870 A1 EP 4420870A1
Authority
EP
European Patent Office
Prior art keywords
layer
bag
paper
sheath
longitudinal edge
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
EP24154369.3A
Other languages
English (en)
French (fr)
Inventor
Sébastien MAUNY
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 France SA
Original Assignee
Coveris Flexibles France SA
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 France SA filed Critical Coveris Flexibles France SA
Publication of EP4420870A1 publication Critical patent/EP4420870A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/02—Bags or like containers made of paper and having structural provision for thickness of contents with laminated walls
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/62—Uniting opposed surfaces or edges; Taping by adhesives
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/644—Making seals parallel to the direction of movement, i.e. longitudinal sealing
    • 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
    • B31F7/00—Processes not otherwise provided for
    • B31F7/006—Processes not otherwise provided for edges, e.g. sheet edges
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2150/00—Flexible containers made from sheets or blanks, e.g. from flattened tubes
    • B31B2150/001—Flexible containers made from sheets or blanks, e.g. from flattened tubes with square or cross bottom
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • 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
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2170/00—Construction of flexible containers
    • B31B2170/20—Construction of flexible containers having multi-layered walls, e.g. laminated or lined
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/08—Bags or like containers made of paper and having structural provision for thickness of contents with block bottoms
    • 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
    • B65D31/00—Bags or like containers made of paper and having structural provision for thickness of contents
    • B65D31/10—Bags or like containers made of paper and having structural provision for thickness of contents with gusseted sides

Definitions

  • the present invention relates to the technical field of packaging bags made from paper, in particular for the packaging of food products.
  • the invention relates to a grease-proof food packaging bag and a method of manufacturing such a bag.
  • a bag for packaging food products comprising a front wall and a rear wall, connected by gussets, a bottom, and a filling opening, the bag is manufactured from a film with a thickness of less than 200 ⁇ m, subjected to successive folding, welding and cutting operations to continuously form the packaging bag.
  • the bag Depending on the packaged food products, there is a need to make the bag resistant to fats that can be released by the products. In particular, the bag must be able to withstand at least the shelf life of the packaged food products.
  • these preformed bags are produced, continuously, from a single plastic film, such as PE with or without the addition of PP, or PE with the addition of PET, or any other materials perfectly known to a person skilled in the art, used in the field of food packaging, in particular.
  • Fats from food products come into contact with the bottom of the bag, soaking the bottom of the paper bag which loses, in addition to its general appearance, its mechanical resistance capabilities.
  • the bottom of the bag becomes greasy, which also causes problems with storing the bag.
  • One of the aims of the invention is therefore to propose a method of manufacturing a packaging bag made at least from paper which is resistant to the grease released by the packaged products, at least during their shelf life.
  • a method for manufacturing a bag for packaging food products, from a film folded, cut and glued/welded continuously to form a sheath defining a front wall, a back wall, possibly connected by gussets, a bottom, and a filling opening.
  • the film is in the form of a complex comprising on the external face a layer of paper and on the internal face a grease barrier layer.
  • the method according to the invention is remarkable in that it consists in using a film of which a longitudinal edge of the barrier layer extends beyond a longitudinal edge of the paper layer along a longitudinal edge of the sheath so as to define a barrier layer flap, free or folded and stuck onto the paper layer, and, when forming the sheath, in sticking the flap inside the sheath, in particular against a front or rear internal wall, to avoid any contact of the longitudinal edge of the paper layer with the food products intended to be packaged in the bag.
  • the bottom of the bag is a flat bottom, well known in the state of the art.
  • the invention also relates to a food packaging bag resistant to grease from said food products.
  • the packaging bag is manufactured from a film in the form of a complex comprising on the external face a layer of paper and on the internal face a grease barrier layer, the film being folded on itself, cut and glued/welded to form a sheath defining at least one front wall and a rear wall, possibly connected by bellows, a filling opening, and a bottom, for example flat.
  • a longitudinal edge of the barrier layer extends beyond a longitudinal edge of the paper layer along a longitudinal edge of the sheath so as to define a barrier layer flap, free or folded and glued to the paper layer, the flap also being glued/welded inside the sheath to prevent any contact of the edge of the paper layer with the food products intended to be packaged in the bag.
  • the shutter has a width of between 8 and 20 mm, for example 12 or 15 mm.
  • the flap and advantageously also the longitudinal edge of the paper layer, is (are) glued with a hot melt glue.
  • the barrier layer is a layer of polypropylene, for example oriented in the machine direction, corresponding to the length of the bag, in cellulose, in polyester, in polyethylene, or in polylactic acid.
  • the invention relates to a method for manufacturing a bag (1) for packaging food products, made from a film (2) in the form of a complex comprising on the external face a layer of paper (2a) and on the internal face a barrier layer (2b) to fats.
  • the barrier layer (2b) of the film (2) intended to be in contact with the packaged products and to act as a barrier to grease, is made of any suitable material, for example polypropylene, cellulose, polyester, polyethylene, polylactic acid, or any other material or coating known for its grease barrier properties.
  • it is made of polypropylene oriented in the machine direction, namely in the length of the bag.
  • the quantity of plastic or more generally of material conferring the role of barrier to grease associated with the paper is low so as not to hinder the recyclability of the bag, and represents a maximum of 2%.
  • the invention resides in that a longitudinal edge of the barrier layer (2b) of the film (2) used to manufacture the bag overhangs relative to a longitudinal edge of the paper layer (2a), so as to define a flap (2b1) of barrier layer (2b), for example made of oriented polypropylene, which is either free or figure 1 And 4 , either folded and glued onto the paper layer (2a), see figure 7 and 8 .
  • the bag (1) is thus manufactured continuously from a strip of film (2) folded back on itself, for example by means of folding sheets, to form a sheath (3) defining a front wall (3a) and a rear wall (3b) connected by gussets (3c), a closed bottom (4), for example a flat bottom, and a filling opening (5).
  • the process consists of depositing two lines of glue (6), for example hot-melt, along the edges to be glued, see figure 4 .
  • glue (6) for example hot-melt
  • the flap (2b1) is glued/welded to the edge of the front (3a) or rear (3b) wall, in a lateral area of a width corresponding to the width of the fold of the gusset (3c).
  • the flap (2b1) is superimposed on the gusset (3c) when the bag is flat.
  • the flap (2b1) therefore provides mechanical protection so that the edge of the paper layer (2a), and in particular its edge, is not in direct contact with the fats released by the packaged foods, so as to delay or even prevent the penetration by capillarity of the fat into the paper constituting the film (2).
  • the flap (2b1) therefore extends over the entire length of the sheath and has a width of between 8 and 20 mm, for example 12 or 15 mm.
  • the sheath (3) is then cut transversely according to the length of the bag to be made, see figure 3 .
  • the bag preferably has a flat bottom (4) also called a square bottom or crossed bottom, formed by carrying out a first step consisting of folding down externally a transverse end of the front wall (3a), so as to open the gussets (3c) and position them flat to form a triangle, then folding down internally the side walls (4a) of the bottom, see figure see figure 5 .
  • a second step then consists of closing and gluing the flat bottom (4) by folding inwards and successively transverse walls (4b) of the bottom, see figure 6 , overlapping one another to close the bottom.
  • the invention does indeed provide a method of manufacturing a packaging bag made at least from paper which is resistant to grease released by the packaged products, at least during their shelf life.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bag Frames (AREA)
  • Making Paper Articles (AREA)
EP24154369.3A 2023-02-23 2024-01-29 Fettresistenter verpackungsbeutel für nahrungsmittel und verfahren zur herstellung eines solchen beutels Pending EP4420870A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR2301655A FR3146134B1 (fr) 2023-02-23 2023-02-23 Sac d’emballage de produits alimentaires et résistant aux graisses, et procédé de fabrication d’un tel sac

Publications (1)

Publication Number Publication Date
EP4420870A1 true EP4420870A1 (de) 2024-08-28

Family

ID=86469067

Family Applications (1)

Application Number Title Priority Date Filing Date
EP24154369.3A Pending EP4420870A1 (de) 2023-02-23 2024-01-29 Fettresistenter verpackungsbeutel für nahrungsmittel und verfahren zur herstellung eines solchen beutels

Country Status (2)

Country Link
EP (1) EP4420870A1 (de)
FR (1) FR3146134B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399096A (en) * 1965-02-04 1968-08-27 St Regis Paper Co Method and apparatus for forming reinforced edges in packaging blanks
ITMI20121397A1 (it) * 2012-08-07 2014-02-08 Lineapack Chinello S R L Sacchetto, particolarmente per il confezionamento di prodotti alimentari.
DE102014015958A1 (de) * 2014-10-31 2016-05-04 Sig Technology Ag Vorrichtung, insbesondere zum Verschließen eines Kopfbereichs eines Nahrungsmittel-behälters, aus einem Laminat mit geschältem und umgeschlagenen Randbereich
EP3663217A1 (de) * 2018-08-15 2020-06-10 Savelev, Dmitrii Viktorovich Verfahren zur herstellung einer länglichen schutzschicht für das formgebende material eines rohlings

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3399096A (en) * 1965-02-04 1968-08-27 St Regis Paper Co Method and apparatus for forming reinforced edges in packaging blanks
ITMI20121397A1 (it) * 2012-08-07 2014-02-08 Lineapack Chinello S R L Sacchetto, particolarmente per il confezionamento di prodotti alimentari.
DE102014015958A1 (de) * 2014-10-31 2016-05-04 Sig Technology Ag Vorrichtung, insbesondere zum Verschließen eines Kopfbereichs eines Nahrungsmittel-behälters, aus einem Laminat mit geschältem und umgeschlagenen Randbereich
EP3663217A1 (de) * 2018-08-15 2020-06-10 Savelev, Dmitrii Viktorovich Verfahren zur herstellung einer länglichen schutzschicht für das formgebende material eines rohlings

Also Published As

Publication number Publication date
FR3146134B1 (fr) 2025-05-09
FR3146134A1 (fr) 2024-08-30

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