WO2006034737A1 - Emballage pour denrees alimentaires, constitue de film plastique et comprenant une soupape de surete - Google Patents

Emballage pour denrees alimentaires, constitue de film plastique et comprenant une soupape de surete Download PDF

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Publication number
WO2006034737A1
WO2006034737A1 PCT/EP2005/005730 EP2005005730W WO2006034737A1 WO 2006034737 A1 WO2006034737 A1 WO 2006034737A1 EP 2005005730 W EP2005005730 W EP 2005005730W WO 2006034737 A1 WO2006034737 A1 WO 2006034737A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
package according
perforation
packaging
layer
Prior art date
Application number
PCT/EP2005/005730
Other languages
German (de)
English (en)
Inventor
Bernhard Lang
Original Assignee
Südpack Verpackungen Gmbh + 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 Südpack Verpackungen Gmbh + Co. Kg filed Critical Südpack Verpackungen Gmbh + Co. Kg
Priority to PCT/EP2005/010086 priority Critical patent/WO2006034793A2/fr
Priority to US11/663,033 priority patent/US20090029082A1/en
Priority to EP05792980A priority patent/EP1793987A2/fr
Publication of WO2006034737A1 publication Critical patent/WO2006034737A1/fr

Links

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
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • 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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/01—Ventilation or drainage of bags
    • 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
    • B65D2205/00—Venting means
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • 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
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3461—Flexible containers, e.g. bags, pouches, envelopes

Definitions

  • the present invention relates to a film packaging for food with pressure relief valve, formed by a Schica ⁇ from a certain pressure in the interior automatically opening Schwumble ⁇ .
  • Such a film pack known from DE 102 53 916 A1 consists of a tubular bag with a welded seam. In this at least one unwelded area is provided, which is on one side close to the interior and on the other side in communication with the outside space.
  • the steam produced during heating, for example by microwave cooking in the tubular bag leads to a rising of the welded seam on the way of the unwelded region, and in this way an overpressure valve which opens itself automatically is formed.
  • suitable design e.g. tapered shape
  • the Austrittsquer ⁇ cut is kept relatively small for the steam, so that even vapor pressure is maintained in the tubular bag.
  • this construction results in that no high pressure is generated in the bag, and this leads to a longer cooking time and to a collapse of the bag after the microwave oven has been switched off.
  • a slot is provided in a film web which is covered by a removable membrane.
  • a removable membrane By removing the adhesive membrane kann.der slot can be exposed without opening the pack. This also happens automatically in a microwave oven, where the adhesive membrane is lifted due to the pressure increase and then venting can take place through the slot.
  • the construction of a vapor pressure in the packaging is not provided. During production, a cutting and a gluing process are additionally required, which increases the production costs.
  • the aim of the invention is to make it possible that, when cooking in a microwave oven with foil packaging, the steam pressure arising as a result of the heating, which blows up the wall of the polymer, should be used.
  • the packaging should be kept under as high a vapor pressure as possible and be protected against bursting by a pressure relief valve. Die ⁇ ses principle corresponds to that of the known pressure cooker.
  • the invention is therefore based on the object to provide a Folien ⁇ packaging that allows cooking food in a microwave oven under the highest possible pressure for ei ⁇ nes sufficient period.
  • a pressure relief valve is thus provided which is formed by a weak zone which automatically opens at a certain pressure inside.
  • the film package comprises at least two film layers, one of which comprises a laser-generated perforation formed by dots and / or lines, while the other is closed there. That is to say, the laser used for cutting is set and controlled in terms of length and power such that a layer is left which seals the food package.
  • the perforation forms a weakening of the Packaging at this point.
  • the perforation line which may for example be a slot, then opens, and the other film layer, eg the sealing layer, is stretched with increasing pressure. Overstretching then leads to the formation of several small openings and cracks in this film layer, ie if the limit of elasticity is exceeded a break occurs on the film. The overpressure can escape via the small openings thus formed, and a balance is established between the resulting overpressure and the number or opening size of the holes in the film.
  • the Matter ⁇ pressure valve thus formed is therefore a dynamic valve which opens depending on the pressure and closes again to a limited extent. In this way, it is possible for steam to escape in controlled manner during the cooking of prepackaged ready meals in the microwave, whereby a greater pressure can be maintained through the dynamic behavior over the cooking time and the cooking time is reduced.
  • the valve effect is independent of the package size or content, whether the water content is e.g. 30 ml or 300 ml.
  • the provision of the perforation according to the invention can be used very easily without additional additional costs, even in mass production.
  • This procedure can be carried out without additional labor Integrate steps in the existing process technology, spielmik in the form of an integration on a Rollenschnei ⁇ the.
  • a specific wavelength can be used in the formation of the perforation in the film layer according to the invention.
  • the film layer provided for the perforation in the film composite consists of a film which absorbs the wavelength typical for the laser.
  • a PET film at 10.25 microns well absorbed the laser light for the formation of perforations.
  • the absorbent film layer may also be the lower film layer, i. the laser beam passes through the overlying first layer and is separated in the underlying second layer due to the higher absorption.
  • the perforation may be in the form of points and / or lines.
  • it may be a slot or be a line consisting of very short lines or points, wherein the intermediate webs must be chosen so small that they break during the stretching of the film and not counteract the actual valve effect.
  • the length of the slots spielmik is determined by the physical properties of the film layer to be stretched, ie the elastic limit determines the breakage of the film. If the slot is too short, it will not overstretch the film, this does not break, there is no valve effect and the packaging bursts.
  • the slot width of the slots can also be adjusted specifically to different, arbitrarily selected dimensions, for example by defocusing the laser or by means of a collimator.
  • the slot width is 0.1 to 3 .mu.m, even more preferably 1 to 3 .mu.m.
  • the film is a duplex film with two layers, wherein the Sie ⁇ gel Mrs example of polypropylene or polyethylene and the protective film, for example, biaxially oriented polyamide, polyester and SiO x -coated polyester or mo ⁇ noaxially oriented vinylpolyamide, etc. can.
  • the protective film for example, biaxially oriented polyamide, polyester and SiO x -coated polyester or mo ⁇ noaxially oriented vinylpolyamide, etc.
  • a laser C0 2 laser has been used, but other lasers can be used.
  • FIG. 1 (a) is a schematic sectional view of a duplex film package according to the invention; and (b) is a plan view of a portion of the package illustrating insertion of the slot.
  • FIG. 2 is an illustration of the opening operation by increasing pressure with elongation of the perforated film (a) in section and (b) as a plan view,
  • FIG 3 shows an illustration of the overstretching process of the perforated film (a) in the sectional view and (b) in plan view,
  • FIG. 4 is a sectional view similar to FIG. 1, but with the underlying foil being cut;
  • Fig. 1 shows the introduction of a slot 10 in the upper sheet 1 of a duplex film F by means of a laser beam L.
  • the slot 10 of the film 1 opens. This is illustrated in FIG. 2.
  • the slot 10 of the film 1 is widened and the underlying film 2 is stretched. It forms a local dilution 12.
  • the film 2 is overstretched. Small openings 14 form when the elastic limit is partially exceeded, and the film breaks. The formation of the openings is illustrated in detail in FIG. 3 (b).
  • Fig. 5 shows a perforation line which extends over the entire film, but consists of individual slots.
  • Fig. 6 shows an arrangement of arbitrarily arranged slots 10 '.
  • Fig. 7 illustrates that the shape of the slots or perforations may be arbitrary, for example, curved, zigzag, circular arc, angled, etc.
  • Fig. 8 illustrates slits 10 "'formed of individual line segments ⁇ nia and slots as well as their location may be arbitrary.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Wrappers (AREA)
  • Package Specialized In Special Use (AREA)

Abstract

L'invention concerne un emballage pour denrées alimentaires, constitué de film plastique et comprenant une soupape de sûreté qui est formée par une zone affaiblie s'ouvrant automatiquement dès qu'une pression déterminée est atteinte à l'intérieur de l'emballage. A cet effet, l'emballage selon l'invention comprend au moins deux couches de film plastique (1, 2), dont une comporte une perforation (10) constituée de points et/ou de lignes, générée par laser, tandis que l'autre est fermée au même endroit.
PCT/EP2005/005730 2004-09-29 2005-05-27 Emballage pour denrees alimentaires, constitue de film plastique et comprenant une soupape de surete WO2006034737A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
PCT/EP2005/010086 WO2006034793A2 (fr) 2004-09-29 2005-09-19 Bande de materiau destinee a des emballages et des contenants d'emballage
US11/663,033 US20090029082A1 (en) 2004-09-29 2005-09-19 Material Web for Packagings, and Packaging Containiners
EP05792980A EP1793987A2 (fr) 2004-09-29 2005-09-19 Bande de materiau destinee a des emballages et des contenants d'emballage

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200410047256 DE102004047256A1 (de) 2004-09-29 2004-09-29 Folienverpackung für Lebensmittel mit Überdruckventil
DE102004047256.4 2004-09-29

Publications (1)

Publication Number Publication Date
WO2006034737A1 true WO2006034737A1 (fr) 2006-04-06

Family

ID=34971085

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2005/005730 WO2006034737A1 (fr) 2004-09-29 2005-05-27 Emballage pour denrees alimentaires, constitue de film plastique et comprenant une soupape de surete

Country Status (2)

Country Link
DE (1) DE102004047256A1 (fr)
WO (1) WO2006034737A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007012468A3 (fr) * 2005-07-27 2007-03-29 Mondi Packaging Ag Conditionnement refermable apte aux micro-ondes
EP1964789A1 (fr) 2007-03-01 2008-09-03 Maag GmbH Verpackungs- und Technische Folien Film d'emballage multicouche à aération automatique
GB2462995A (en) * 2008-09-02 2010-03-03 Steamfast Europ Ltd Food packaging sheet for use in microwave ovens
WO2010038079A1 (fr) * 2008-10-03 2010-04-08 Innovia Films Limited Film d'emballage
CH700481A1 (de) * 2009-02-26 2010-08-31 Micropast Gmbh Verfahren zum Haltbarmachen von Lebensmitteln.
US10136757B2 (en) 2004-05-27 2018-11-27 Mirtech, Inc. Packaging material for cooking food
US10155602B2 (en) 2005-02-10 2018-12-18 Conagra Foods Rdm, Inc. Magnetron control system and associated methodology
WO2024120874A1 (fr) * 2022-12-07 2024-06-13 Micvac Ab Soupape unidirectionnelle pour emballage alimentaire

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762514A (en) * 1985-11-01 1988-08-09 Fujimori Kogyo Co., Ltd. Method of making beverage packaging bag
EP0974531A1 (fr) * 1998-07-24 2000-01-26 Patrick Simon Conditionnement pour produit alimentaire multi-composants
US6068898A (en) * 1996-11-13 2000-05-30 Hitoshi Omoto Sheet films, packaging materials, and packaging using the same having pressure control valve
US20020183181A1 (en) * 1997-04-28 2002-12-05 Dai Nippon Printing Co., Ltd. Package, package manufacturing method and package manufacturing system for carrying out the package manufacturing method
WO2005007400A2 (fr) * 2003-07-16 2005-01-27 Dupont Teijin Films U.S. Limited Partnership Film polymere autoventile i

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4762514A (en) * 1985-11-01 1988-08-09 Fujimori Kogyo Co., Ltd. Method of making beverage packaging bag
US6068898A (en) * 1996-11-13 2000-05-30 Hitoshi Omoto Sheet films, packaging materials, and packaging using the same having pressure control valve
US20020183181A1 (en) * 1997-04-28 2002-12-05 Dai Nippon Printing Co., Ltd. Package, package manufacturing method and package manufacturing system for carrying out the package manufacturing method
EP0974531A1 (fr) * 1998-07-24 2000-01-26 Patrick Simon Conditionnement pour produit alimentaire multi-composants
WO2005007400A2 (fr) * 2003-07-16 2005-01-27 Dupont Teijin Films U.S. Limited Partnership Film polymere autoventile i

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10136757B2 (en) 2004-05-27 2018-11-27 Mirtech, Inc. Packaging material for cooking food
US10155602B2 (en) 2005-02-10 2018-12-18 Conagra Foods Rdm, Inc. Magnetron control system and associated methodology
WO2007012468A3 (fr) * 2005-07-27 2007-03-29 Mondi Packaging Ag Conditionnement refermable apte aux micro-ondes
EP1964789A1 (fr) 2007-03-01 2008-09-03 Maag GmbH Verpackungs- und Technische Folien Film d'emballage multicouche à aération automatique
GB2462995A (en) * 2008-09-02 2010-03-03 Steamfast Europ Ltd Food packaging sheet for use in microwave ovens
GB2462995B (en) * 2008-09-02 2012-11-14 Excelsior Technologies Ltd Improved food packaging for use in microwave ovens
WO2010038079A1 (fr) * 2008-10-03 2010-04-08 Innovia Films Limited Film d'emballage
CH700481A1 (de) * 2009-02-26 2010-08-31 Micropast Gmbh Verfahren zum Haltbarmachen von Lebensmitteln.
WO2010096939A1 (fr) * 2009-02-26 2010-09-02 Micropast Gmbh Procédé de conservation de produits alimentaires
WO2024120874A1 (fr) * 2022-12-07 2024-06-13 Micvac Ab Soupape unidirectionnelle pour emballage alimentaire

Also Published As

Publication number Publication date
DE102004047256A1 (de) 2006-04-13

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