EP1201561B1 - A package of a flexible plastics material for foodstuff - Google Patents

A package of a flexible plastics material for foodstuff Download PDF

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Publication number
EP1201561B1
EP1201561B1 EP01102944A EP01102944A EP1201561B1 EP 1201561 B1 EP1201561 B1 EP 1201561B1 EP 01102944 A EP01102944 A EP 01102944A EP 01102944 A EP01102944 A EP 01102944A EP 1201561 B1 EP1201561 B1 EP 1201561B1
Authority
EP
European Patent Office
Prior art keywords
plastics material
weldings
films
package
sheet
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.)
Expired - Lifetime
Application number
EP01102944A
Other languages
German (de)
French (fr)
Other versions
EP1201561A2 (en
EP1201561A3 (en
Inventor
Giancarlo Tedeschi
Maurizio Galvani
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.)
Barilla G e R Fratelli SpA
Original Assignee
Barilla G e R Fratelli SpA
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 Barilla G e R Fratelli SpA filed Critical Barilla G e R Fratelli SpA
Priority to SI200130632T priority Critical patent/SI1201561T1/en
Publication of EP1201561A2 publication Critical patent/EP1201561A2/en
Publication of EP1201561A3 publication Critical patent/EP1201561A3/en
Application granted granted Critical
Publication of EP1201561B1 publication Critical patent/EP1201561B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • B65D75/52—Details
    • B65D75/58—Opening or contents-removing devices added or incorporated during package manufacture
    • 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
    • B65D75/40—Packages formed by enclosing successive articles, or increments of material, in webs, e.g. folded or tubular webs, or by subdividing tubes filled with liquid, semi-liquid, or plastic materials
    • B65D75/44—Individual packages cut from webs or tubes

Definitions

  • This invention relates to the field of packaging and in particular to the packaging of food products.
  • This technique allows to quickly package different products, among which food products, starting from a sheet of a plastics material, which is folded over the product and thermo-welded at its rims so as to form a sort of tubular bag encasing the product.
  • the sheet of plastics material generally consists of two films of a thermoplastic material bonded to one other, typically by means of an adhesive.
  • One of these films generally has oriented fibers, whereas the other one has non-oriented fibers.
  • the problem underlying this invention was that of providing a package which might enable a safe opening by the consumer, avoiding the risk of tearing the envelope and thus ensuring the re-closeability of the package.
  • a package of a flexible plastics material for foodstuff comprising a bag closed at its opposite ends by respective weldings, obtained according to the so-called flow-pack technique from a sheet consisting of a first film of a plastics material with oriented fibers bonded to a second film of a plastics material with non-oriented fibers, characterized in that said first and second films are bonded to one another by means of an adhesive coated over the whole surface of one of them, except in a region in proximity to at least one of said weldings (2), in which region said sheet shows a plurality of zones of bonding discontinuity between said first and second films.
  • the weldings are preferably thermo-weldings.
  • the films are made of a plastics material chosen from polyethylene and, advantageously, polypropylene.
  • a package according to an embodiment of the present invention comprises a tubular bag 1 enclosing a food product, closed at its opposite ends by transversal thermo-weldings 2, 3.
  • the bag 1 is obtained by flow-pack technique from a sheet 4 of a plastics material consisting of two films 4a, 4b, bonded together by means of an adhesive 6.
  • One of these two films is of a thermoplastics material with oriented fibers, whereas the other film is of a thermoplastic material with non-oriented fibers.
  • the spaces among the spots coated with the adhesive represent zones 5 of bonding discontinuity between the films.
  • Fig. 3 shows a sheet 4 of plastics material used to make the package according to the invention.
  • This sheet is produced by a conventional machine for bonding films of plastics material, using a cylinder for laying an adhesive, which has been suitably arranged in order to obtain a so-called "in register" deposition.
  • the adhesive is laid onto the surface of the film to be bonded in such a way that for certain lengths of the film the whole surface is coated whereas, for other lengths, the adhesive is laid according to a dotted pattern or, in any case, in such a way that the surface of the film is not wholly coated.
  • the sheet obtained by bonding the two films will therefore show lengths in which the two films have a continuous adhesive layer interposed between one another alternating to lengths in which the two films are only bonded at certain areas.
  • the thus obtained sheet after being wound onto a reel, is used to produce the package according to the invention, by using the conventional apparatus of the flow-pack technique.
  • the adhesive for bonding the two films can be chosen among those commonly used in the flow-pack technique and is preferably an adhesive suitable for food packages.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wrappers (AREA)
  • Packages (AREA)
  • Bag Frames (AREA)
  • Laminated Bodies (AREA)
  • Cookers (AREA)

Abstract

A package of a flexible plastics material for foodstuff, comprising a bag (1) closed at its opposite ends by respective weldings (2, 3), obtained according to the flow-pack technique from a sheet (4) consisting of a first film (4a) of a plastics material with oriented fibers bonded to a second film (4b) of a plastics material with non-oriented fibers, wherein the sheet (4) shows a plurality of zones (5) of bonding discontinuity between the first (4a) and second (4b) films in proximity to at least one of the thermo-weldings (2). <IMAGE>

Description

    Technical field
  • This invention relates to the field of packaging and in particular to the packaging of food products.
    • Background of the invention
  • Among the different kinds of packages used for food products, those obtained according to the so-called flow-pack technique are have become more and more successful.
  • This technique allows to quickly package different products, among which food products, starting from a sheet of a plastics material, which is folded over the product and thermo-welded at its rims so as to form a sort of tubular bag encasing the product.
  • The sheet of plastics material generally consists of two films of a thermoplastic material bonded to one other, typically by means of an adhesive. One of these films generally has oriented fibers, whereas the other one has non-oriented fibers.
  • Although being quite satisfactory under numerous standpoints, these packages show an inconvenience linked to the opening operation. When the packages are opened by the consumer by pulling in opposite directions the envelope at the thermo-weldings located at one of the ends of the envelope, there often occurs a tearing of the envelope, which is propagated, substantially in the direction of the oriented fibers, up the middle portion of the package and even farther. This jeopardizes the possibility of re-closing the package.
    • Summary of the invention
  • The problem underlying this invention was that of providing a package which might enable a safe opening by the consumer, avoiding the risk of tearing the envelope and thus ensuring the re-closeability of the package.
  • Such a problem is solved, according to the invention, by a package of a flexible plastics material for foodstuff, comprising a bag closed at its opposite ends by respective weldings, obtained according to the so-called flow-pack technique from a sheet consisting of a first film of a plastics material with oriented fibers bonded to a second film of a plastics material with non-oriented fibers, characterized in that said first and second films are bonded to one another by means of an adhesive coated over the whole surface of one of them, except in a region in proximity to at least one of said weldings (2), in which region said sheet shows a plurality of zones of bonding discontinuity between said first and second films.
  • The weldings are preferably thermo-weldings.
  • Preferably, the films are made of a plastics material chosen from polyethylene and, advantageously, polypropylene.
    • Brief description of the drawings
  • The present invention will be further illustrated with reference to the attached drawings, in which:
    • Fig. 1 is a perspective view of a package according to the invention;
    • Fig. 2 is an enlarged view of a section taken along line II-II;
    • Fig. 3 is a top view of a sheet used in the package according to the invention.
    Detailed description of the invention
  • With reference to the above figures, a package according to an embodiment of the present invention comprises a tubular bag 1 enclosing a food product, closed at its opposite ends by transversal thermo-weldings 2, 3. The bag 1 is obtained by flow-pack technique from a sheet 4 of a plastics material consisting of two films 4a, 4b, bonded together by means of an adhesive 6.
  • One of these two films is of a thermoplastics material with oriented fibers, whereas the other film is of a thermoplastic material with non-oriented fibers.
  • These two films 4a and 4b are bonded to one another by means of said adhesive 6, which is coated over the surface of one of them. However, in a region of predetermined width near the thermo-weldings 2 at one of the opposite ends of the bag 1, the two films are bonded to one another by means of an adhesive, preferably the same adhesive 6 mentioned above, which is applied in a dotted pattern. The small circular spots 6 of Fig. 1 schematically represent the above dotted pattern.
  • The spaces among the spots coated with the adhesive represent zones 5 of bonding discontinuity between the films.
  • The discontinuity zones 5 and the circular spots 6 at which the two films 4a and 4b are bonded to one another are also visible in Fig. 3, which shows a sheet 4 of plastics material used to make the package according to the invention.
  • This sheet is produced by a conventional machine for bonding films of plastics material, using a cylinder for laying an adhesive, which has been suitably arranged in order to obtain a so-called "in register" deposition. According to the present invention, by virtue of the in register deposition, the adhesive is laid onto the surface of the film to be bonded in such a way that for certain lengths of the film the whole surface is coated whereas, for other lengths, the adhesive is laid according to a dotted pattern or, in any case, in such a way that the surface of the film is not wholly coated. The sheet obtained by bonding the two films will therefore show lengths in which the two films have a continuous adhesive layer interposed between one another alternating to lengths in which the two films are only bonded at certain areas.
  • The thus obtained sheet, after being wound onto a reel, is used to produce the package according to the invention, by using the conventional apparatus of the flow-pack technique.
  • The adhesive for bonding the two films can be chosen among those commonly used in the flow-pack technique and is preferably an adhesive suitable for food packages.
  • It has surprisingly been found that, thanks to the presence of these zones of bonding discontinuity, when the package is opened and the envelope is torn by pulling in opposite directions at the thermo-weldings, the tearing stops in the region which is directly adjacent to the thermo-weldings and is not propagated in the direction of the oriented fibers. In such a way, the re-closeability of the package is ensured and this allows the freshness of the food to be preserved for a longer time, while protecting the food from the contact with powder and moisture.
  • All of these advantages are achieved in a simple manner, without having to modify the apparatus which are commonly used in the flow-pack packaging technique, by only modifying the step by which the adhesive is laid for bonding the films of plastics material which form the flexible envelope of the package.

Claims (4)

  1. A package of a flexible plastics material for foodstuff, comprising a bag (1) closed at its opposite ends by respective weldings (2, 3), obtained according to the so-called flow-pack technique from a sheet (4) consisting of a first film (4a) of a plastics material with oriented fibers bonded to a second film (4b) of a plastics material with non-oriented fibers, characterized in that said first (4a) and second (4b) films are bonded to one another by means of an adhesive coated over the whole surface of one of them, except in a region in proximity to at least one of said weldings (2), in which region said sheet (4) shows a plurality of zones (5) of bonding discontinuity between said first (4a) and second (4b) films.
  2. A package according to claim 1, wherein said plastics material is polyethylene or polypropylene.
  3. A package according to claim 1 or 2, wherein said weldings (2,3) are thermo-weldings.
  4. A package according to claim 3, wherein said first (4a) and second (4b) films are bonded in proximity to at least one of said thermo-weldings (2) by application of an adhesive in a dotted pattern (6) so as to give rise to said zones (5) of bonding discontinuity.
EP01102944A 2000-10-24 2001-02-08 A package of a flexible plastics material for foodstuff Expired - Lifetime EP1201561B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SI200130632T SI1201561T1 (en) 2000-10-24 2001-02-08 A package of a flexible plastics material for foodstuff

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI002301 2000-10-24
IT2000MI002301A IT1320076B1 (en) 2000-10-24 2000-10-24 FLEXIBLE PLASTIC PACKAGE FOR FOOD.

Publications (3)

Publication Number Publication Date
EP1201561A2 EP1201561A2 (en) 2002-05-02
EP1201561A3 EP1201561A3 (en) 2005-01-19
EP1201561B1 true EP1201561B1 (en) 2006-07-19

Family

ID=11446027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01102944A Expired - Lifetime EP1201561B1 (en) 2000-10-24 2001-02-08 A package of a flexible plastics material for foodstuff

Country Status (8)

Country Link
EP (1) EP1201561B1 (en)
AT (1) ATE333421T1 (en)
DE (1) DE60121526T2 (en)
DK (1) DK1201561T3 (en)
ES (1) ES2267609T3 (en)
IT (1) IT1320076B1 (en)
PT (1) PT1201561E (en)
SI (1) SI1201561T1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT276220B (en) * 1967-05-18 1969-11-25 Natron Papier Ind Ges M B H Method for producing a packaging material, in particular for sacks
US5154789A (en) * 1984-11-28 1992-10-13 American National Can Company Multiple layer films containing oriented layers of nylon and ethylene vinyl alcohol copolymers
FR2666049B1 (en) * 1990-08-21 1994-09-23 Sofitind COMPOSITE SHEET MATERIAL, ESPECIALLY FOR THE PRODUCTION OF PACKAGING.
DE29802833U1 (en) * 1998-02-19 1998-05-07 Imer, Rodney Haydn, Barcelona, Vallvidrera Composite film, in particular for the production of packaging bags, and packaging bags produced from such a composite film
DE20005048U1 (en) * 2000-03-20 2000-06-08 Stollpack Verpackungs GmbH, 51427 Bergisch Gladbach Warming bags

Also Published As

Publication number Publication date
EP1201561A2 (en) 2002-05-02
IT1320076B1 (en) 2003-11-18
ITMI20002301A1 (en) 2002-04-24
DE60121526D1 (en) 2006-08-31
SI1201561T1 (en) 2007-02-28
ES2267609T3 (en) 2007-03-16
DK1201561T3 (en) 2006-11-13
EP1201561A3 (en) 2005-01-19
DE60121526T2 (en) 2007-02-15
PT1201561E (en) 2006-12-29
ATE333421T1 (en) 2006-08-15

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