EP1283179A1 - Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln - Google Patents

Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln Download PDF

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Publication number
EP1283179A1
EP1283179A1 EP01118968A EP01118968A EP1283179A1 EP 1283179 A1 EP1283179 A1 EP 1283179A1 EP 01118968 A EP01118968 A EP 01118968A EP 01118968 A EP01118968 A EP 01118968A EP 1283179 A1 EP1283179 A1 EP 1283179A1
Authority
EP
European Patent Office
Prior art keywords
package
food product
microwave
seal
layer
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.)
Withdrawn
Application number
EP01118968A
Other languages
English (en)
French (fr)
Inventor
Claude Bergerioux
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.)
Tetra Laval Holdings and Finance SA
Original Assignee
Tetra Laval Holdings and Finance 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 Tetra Laval Holdings and Finance SA filed Critical Tetra Laval Holdings and Finance SA
Priority to EP01118968A priority Critical patent/EP1283179A1/de
Priority to PCT/EP2001/014332 priority patent/WO2003013980A1/en
Publication of EP1283179A1 publication Critical patent/EP1283179A1/de
Withdrawn legal-status Critical Current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
    • B65D75/008—Standing pouches, i.e. "Standbeutel"
    • 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
    • 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
    • B65D2581/00—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
    • B65D2581/34—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
    • B65D2581/3401—Cooking or heating method specially adapted to the contents of the package
    • B65D2581/3402—Cooking or heating method specially adapted to the contents of the package characterised by the type of product to be heated or cooked
    • B65D2581/3428—Cooking unusual food, i.e. none of the above foods

Definitions

  • the present invention relates to a microwave heatable food product package.
  • pourable food products such as fruit juice, UHT (ultra-high-temperature processed) milk, wine, tomato sauce, etc.
  • pourable food products such as fruit juice, UHT (ultra-high-temperature processed) milk, wine, tomato sauce, etc.
  • the packaging material has a multilayer structure comprising a layer of fibrous material, e.g. paper, covered on both sides with layers of heat-seal plastic material, e.g. polyethylene, and, in the case of aseptic packages for long-storage products, such as UHT milk, also comprises a layer of oxygen-barrier material defined, for example, by an aluminium film which is superimposed on a layer of heat-seal plastic material and is in turn covered with another layer of heat-seal plastic material eventually defining the inner face of the package contacting the food product.
  • a layer of fibrous material e.g. paper
  • heat-seal plastic material e.g. polyethylene
  • a typical example of such a package is the parallelepiped-shaped package for liquid or pourable food products known as Tetra Brik Aseptic (registered trademark), which is formed from a continuous tube of packaging material obtained by bending and longitudinally sealing a web packaging material; the web of packaging material is sterilized on the packaging machine itself, e.g. by applying a chemical sterilizing agent, such as a hydrogen peroxide solution, which, after sterilization, is removed, e.g. vaporized by heating, from the surfaces of the packaging material; and the web of packaging material so sterilized is maintained in a closed sterile environment, and is folded and sealed longitudinally to form a vertical tube.
  • Tetra Brik Aseptic registered trademark
  • the tube is filled with the sterilized or sterile-processed food product, and is sealed and cut at equally spaced cross sections to form pillow packs, whose ends are then folded mechanically to form a pair of bottom triangular flaps folded and heat-sealed against the bottom surface of the package and a pair of upper flaps folded and heat-sealed against respective lateral walls of the package.
  • a similar process may be used to produce wedge-shaped packages, such as the packages commercially available under the trade name Tetra Wedge Aseptic (registered trademark).
  • a wedge-shaped package is obtained from a pillow pack by mechanically folding only the two bottom flaps, and leaving the top transversal seal of the pack linear and flat, so as to define the edge of the wedge shape.
  • the wedge-shaped packages are relatively inexpensive, have excellent stand-up capability and may be provided with a prelaminated hole (i.e. made in the paper layer but not in the barrier layer of the packaging material) or with a hole internally protected by a breakable patch of oxygen barrier material, in the upper part near the top transversal seal, so as to allow the use of a drinking straw.
  • Parallelepiped packages are generally used for different food products, including drinks and relatively dense or viscous products such as sauces, e.g. cooking cream or tomato sauce, in a wide variety of dimensions (e.g. from 125 to 2000 ml).
  • sauces e.g. cooking cream or tomato sauce
  • Known wedge-shaped packages are generally used for single portions of liquid food products, in particular drinks, ranging from 50 to 400 ml.
  • packages of the above-described types obtained from laminated web packaging materials, have been widely used in connection with food products to be consumed cold.
  • the food product In case the food product is adapted to be heated or cooked, e.g. by means of microwaves, it must be removed from the package and heated in a suitable container.
  • An aim of the present invention is to provide a food product package made from web packaging material, which can be easily and quickly microwave-heated without opening the package beforehand.
  • an object of the invention is to provide a microwave-heatable package which has a built-in safety function, thereby dispensing with the need to incorporate safety valves or the like.
  • a microwave-heatable package containing a food product to be consumed hot, said package being made from a web packaging material including at least one layer adapted to provide mechanical strength, a barrier layer pervious to microwave radiations, and at least an outer and an inner heat seal layers, said package being substantially wedge-shaped and including a rectangular base wall, a front wall and a back wall extending from opposite sides of the base wall and joining together at a top transversal seal, said top transversal seal being adapted to open upon exposure of said package to microwave radiations.
  • numeral 1 references a package products according to the present invention containing a food product 2 to be consumed hot, for example a hot drink or a baby food product or a pediatric nutritional product, or a dense or viscous fluid such as a sauce containing oils or fats or a soup.
  • Package 1 is made from a web packaging material 3 (figure 5) - hereinafter "material 3" - and is substantially wedge-shaped. More particularly, package 1 includes a rectangular base wall (not shown) 4, a front wall 5 and a back wall 6 of substantially isosceles trapezoidal shape with their respective shorter bases adjacent to base wall 4 and their respective longer bases sealed together by a top transversal seal 7, and a pair of lateral walls 8, 9 of substantially triangular shape.
  • Package 1 is obtained, in a manner known per se, by longitudinally bending ad sealing a web (not shown) of material 3 to form a continuous tube; the longitudinal seal is referenced 10 in figure 1 and extends along back wall 6.
  • the continuous tube is then filled with the food product 2 and transversally sealed at constant intervals to form pillow packs (not shown).
  • Material 3 is provided with a crease pattern, not shown as known in itself, which allows the material to be easily folded along inclined lateral corners and along base corners, to form lateral bottom flaps 13, 14 which are folded and sealed against base wall 4 to ensure shape stability of the package.
  • Material 3 (see enlarged detail of fig. 1) is a multi-layer laminated material basically including a heat seal outer layer 15, preferably made of PE, a paper layer 16 adapted to provide some mechanical strength, a barrier layer 17 and a heat seal inner layer 18 preferably made of LDPE (Low Density PE) or Metallocene. Additional mechanical strength is imparted to the packaging material structure by the barrier material which has a high melt temperature, whereby to maintain a high mechanical strength, even at high temperatures (e.g., 120°C). In this way, stresses are transferred to the heat seal inner layer during heating. Adhesive layers of known type (not shown) may be further provided between the paper layer and the barrier layer, as well as between the barrier layer and the inner layer.
  • Adhesive layers of known type (not shown) may be further provided between the paper layer and the barrier layer, as well as between the barrier layer and the inner layer.
  • barrier layer 15 is pervious to microwave radiation, so as to allow microwave radiation to reach the food product 2;
  • barrier layer is made from a polymer or a mineral coated polymer having a high melting temperature, e.g. over 130°C.
  • the barrier layer is made from a material chosen in the group including SiOx-coated PET, SiOx-coated PA, SiOx-coated EVOH; alternatively, if the barrier effect is sufficient, EVOH alone may be used.
  • suitable coatings for the barrier layer include silicon nitride, aluminium oxide, diamond-like carbon coatings or combinations thereof.
  • the package 1 can be microwave-heated without opening the package.
  • the combination of the shape of the package 1 and the pressure increase inside the package due to steam evolution consequent to microwave irradiation brings about the surprising effect that the top transversal seal 7 unseals, i.e. the package opens automatically along the top transversal seal 7, when the food product is hot (fig. 4). This happens because the wedge shape of the package concentrates mechanical and thermal stress onto the top transversal seal 7.
  • the barrier layer has a higher melt strength than the heat-seal inner layer, and the wedge shape transfers stresses exerted on the package, during heating, to the top transversal seal.
  • the wedge shaped geometry produces temperature gradients in the food product; in particular, the product in the central zone near the base wall 4 of the package has the lowest temperature (40-50°C), whilst the product in the central zone near the top surface reaches the highest temperature (up to 120° in case of fatty sauces); the product in the vicinity of lateral walls 8, 9 ranges form about 60°C near the base wall to about 80°C near the top surface.
  • the combination of the wedge shape and a microwave-pervious barrier layer allows the food product to be safely heated without any risk of explosion or spill, and without any need to open the package before heating.
  • No safety device such as a pressure release valve is necessary, which would be very difficult to provide in an aseptic package.
  • the package After heating, the package is open and ready for use, and can be safely handled both because of its excellent stability, due to its geometry, and because of the good heat insulating properties of the packaging material, which remains relatively fresh at its outer surface.
  • the package described may be modified without departing from the scope of the present invention as defined by the claims.
  • the layer of the packaging material adapted to provide mechanical strength may be made from a polymeric material rather than from paper material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
EP01118968A 2001-08-06 2001-08-06 Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln Withdrawn EP1283179A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP01118968A EP1283179A1 (de) 2001-08-06 2001-08-06 Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln
PCT/EP2001/014332 WO2003013980A1 (en) 2001-08-06 2001-12-05 Microwave-heatable food product package

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP01118968A EP1283179A1 (de) 2001-08-06 2001-08-06 Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln

Publications (1)

Publication Number Publication Date
EP1283179A1 true EP1283179A1 (de) 2003-02-12

Family

ID=8178256

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01118968A Withdrawn EP1283179A1 (de) 2001-08-06 2001-08-06 Verpackung zur Mikrowellenerhitzung von Nahrungsmitteln

Country Status (2)

Country Link
EP (1) EP1283179A1 (de)
WO (1) WO2003013980A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10349744B3 (de) * 2003-10-23 2005-04-14 Gisela Rinderspacher Verpackung für Lebensmittel
NL1026001C2 (nl) * 2004-04-22 2005-10-25 Fico Bv Doseereenheid met omhulmateriaal en werkwijze voor het vervaardigen van zo een doseereenheid.
WO2006107636A1 (en) * 2005-04-01 2006-10-12 Graphic Packaging International, Inc. Microwave interactive flexible packaging
US9296171B2 (en) 2008-03-11 2016-03-29 Frito-Lay North America, Inc. Method for making a flat bottom pillow pouch
EP3093309A1 (de) 2015-05-11 2016-11-16 Coating Plasma Industrie Verfahren zum aufbringen einer gassperrschicht auf eine polymerfolie oder einen polymerbehälter und polymerfolie oder polymerbehälter mit solch einer gassperre

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0431273A (ja) * 1990-05-14 1992-02-03 Toyo Alum Kk 食品包装体
EP0537109A2 (de) * 1991-09-25 1993-04-14 Alusuisse-Lonza Services Ag Beutelverpackung
EP0768248A1 (de) * 1994-04-26 1997-04-16 Shimaya Co., Ltd. Beutel für das Kochen mittels Mikrowellen
FR2769006A1 (fr) * 1997-09-29 1999-04-02 Pescanova France Sa Materiau d'emballage notamment pour papillotes et emballage realise a partir de ce materiau
FR2796047A1 (fr) * 1999-07-06 2001-01-12 Danisco Flexible France Emballage pour le conditionnement d'une preparation alimentaire

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1099645A1 (de) * 1999-11-10 2001-05-16 Wipak Gryspeert Société Anonyme Verpackung mit Sauberkeits- und Sichereitsvorrichtung

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0431273A (ja) * 1990-05-14 1992-02-03 Toyo Alum Kk 食品包装体
EP0537109A2 (de) * 1991-09-25 1993-04-14 Alusuisse-Lonza Services Ag Beutelverpackung
EP0768248A1 (de) * 1994-04-26 1997-04-16 Shimaya Co., Ltd. Beutel für das Kochen mittels Mikrowellen
FR2769006A1 (fr) * 1997-09-29 1999-04-02 Pescanova France Sa Materiau d'emballage notamment pour papillotes et emballage realise a partir de ce materiau
FR2796047A1 (fr) * 1999-07-06 2001-01-12 Danisco Flexible France Emballage pour le conditionnement d'une preparation alimentaire

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 016, no. 206 (M - 1248) 15 May 1992 (1992-05-15) *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7323669B2 (en) 2002-02-08 2008-01-29 Graphic Packaging International, Inc. Microwave interactive flexible packaging
US8013280B2 (en) 2002-02-08 2011-09-06 Graphic Packaging International, Inc. Microwave interactive flexible packaging
US8642935B2 (en) 2002-02-08 2014-02-04 Graphic Packaging International, Inc. Microwave interactive flexible packaging
DE10349744B3 (de) * 2003-10-23 2005-04-14 Gisela Rinderspacher Verpackung für Lebensmittel
NL1026001C2 (nl) * 2004-04-22 2005-10-25 Fico Bv Doseereenheid met omhulmateriaal en werkwijze voor het vervaardigen van zo een doseereenheid.
WO2006107636A1 (en) * 2005-04-01 2006-10-12 Graphic Packaging International, Inc. Microwave interactive flexible packaging
US9296171B2 (en) 2008-03-11 2016-03-29 Frito-Lay North America, Inc. Method for making a flat bottom pillow pouch
EP3093309A1 (de) 2015-05-11 2016-11-16 Coating Plasma Industrie Verfahren zum aufbringen einer gassperrschicht auf eine polymerfolie oder einen polymerbehälter und polymerfolie oder polymerbehälter mit solch einer gassperre

Also Published As

Publication number Publication date
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