EP1076012B1 - Lebensmittelverpackung mit Ventil und Zubereitungsverfahren für Lebensmittel - Google Patents

Lebensmittelverpackung mit Ventil und Zubereitungsverfahren für Lebensmittel Download PDF

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Publication number
EP1076012B1
EP1076012B1 EP00810671A EP00810671A EP1076012B1 EP 1076012 B1 EP1076012 B1 EP 1076012B1 EP 00810671 A EP00810671 A EP 00810671A EP 00810671 A EP00810671 A EP 00810671A EP 1076012 B1 EP1076012 B1 EP 1076012B1
Authority
EP
European Patent Office
Prior art keywords
packaging
valve
foodstuffs
microwave oven
heating
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
EP00810671A
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German (de)
English (en)
French (fr)
Other versions
EP1076012A1 (de
Inventor
Karl Keller
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.)
CREATIVE NEW FOOD DREAM STEAM GmbH
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to DK00810671T priority Critical patent/DK1076012T3/da
Publication of EP1076012A1 publication Critical patent/EP1076012A1/de
Application granted granted Critical
Publication of EP1076012B1 publication Critical patent/EP1076012B1/de
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
    • 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
    • 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
    • B65D2205/00—Venting means
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S99/00—Foods and beverages: apparatus
    • Y10S99/14—Induction heating

Definitions

  • the present invention relates to a transport and / or sales packaging for and with Food / s, which are intended for consumption in a heated state and in the Packaging to be heated according to the preamble of claim 1.
  • the invention also relates to a method for preparing food in one Vessel in a microwave oven, due to the water content of the food and the construction of the vessel during heating in the vessel Forms steam storage situation with overpressure.
  • a packaging and a cooking method of this kind are known from WO 99/32373.
  • the known packaging and the method can be especially fresh, still raw Cook food in just minutes, although one with traditional ready meals does not achievable quality is achievable.
  • valve used An important role is played by the valve used. This is as a one-way check valve trained and allows an automatic outgassing of food before actual preparation at an extremely low opening pressure of only a few millibars. At the same time, it ensures a hermetic conclusion against the outside by putting it after each Close the opening again as soon as the internal overpressure has dropped below a certain level.
  • valve in WO 99/32373 such with the name WICOVALVE the company Wipf AG described in CH-8604 Volketswil, which in itself for filling bags for roasted Coffee is designed.
  • the valve has a dimensionally stable valve body with a flat Sealing surface and therein a thin, flexible membrane.
  • the membrane is covered with some sealing oil wetted. Due to this training, the valve seals well and opens and closes within relatively narrow tolerance limits. So its opening pressure is only about 3 mb. It closes again when the internal overpressure has dropped to approx. 0.5 mb.
  • the valve points also a well-defined flow cross-section. Because of these properties can be accurately control and predict the cooking results. This is possible, for example. raw in to cook the vegetables exactly "on the spot" ("al dente" or "à point”).
  • the known packaging is preferably designed as a disposable package.
  • a Embodiment consists of a shallow shell of a relatively thin, for her Handling, their transport and occurring during the steam storage phase pressure and Temperature loads, however, sufficiently dimensionally stable plastic material. Covered is the shell with a transparent, flexible plastic film, with the shell on the edge is welded all around. In this cover film, the valve is preferably incorporated.
  • the present invention aims at a Further improvement of the known packaging and the associated method. It It turned out that in the packaging after the heating process especially in a microwave oven during cooling to the desired Consumption temperature under certain conditions, a negative pressure situation may occur. at Packaging with dimensionally stable, but still relatively thin running wall parts, as in the mentioned shell, it can thereby undesirable deformation "negative" come.
  • the valve used is designed so that it during the heating of the food in the packaging is changed so that it then at least during the cooling of the food to the consumption temperature can no longer close, the formation of a negative pressure is prevented in this phase.
  • the valve can also be changed permanently, because it is after the preparation of the Food in its function is no longer needed.
  • the desired change in particular be done by choosing a plastic material for the thin membrane, which deforms during heating of the package under the temperature occurring.
  • the deformation should, however, only at a temperature greater than about 50 ° or even 60 ° C. to allow the valve to perform its function prior to the actual heating process, i. so during transport and storage of the packaging reserves.
  • the foods are ready to eat pre-spiced so that they are consumed immediately after heating in the microwave can.
  • wort in this case the usual flavorings but also the addition of e.g. one small amount of herb butter, a sauce or the like can be understood.
  • meat or Fish pieces are with advantage with a spice emulsion, an oil or fatty Marinade or the like sheathed, which protects the pieces in addition, in the rapid warming in the microwave to become fibrous.
  • Raw dough can be used for a cake or the like, this then in the Steam atmosphere, so to speak, "steam baked” is.
  • the claim 11 relates to a method of the type mentioned, in which according to the invention as a vessel for receiving the food as a sales and / or Transport package trained packaging according to one of claims 1 - 10 used becomes.
  • 1 denotes a deep-drawn, flat shell of e.g. rectangular, square or even round floor plan form of a thin plastic material.
  • a thin plastic material e.g. Polypropylene, being a mixture of monopolymeric and copolymeric polypropylene in the ratio of about 90:10 to about 95: 5 is preferred.
  • the Wall thickness should be from about 600 microns to around 900 microns, with the 900 microns a better To ensure grease resistance.
  • a cover sheet 4 for which e.g. 12 ⁇ m Polyester can be used against about 90 to 100 microns monopolymers polypropylene laminated.
  • valve 5 of the type already mentioned, i. a one-way check valve WICOVALVE valve of the company Wipf incorporated, which has a membrane 6 on a Has sealing surface 7.
  • the valve 5 is for reasons of its better recognizability exaggeratedly big and also exaggeratedly drawn.
  • the WICOVALVE valves of the company Wipf only have a diameter of about 1.5 cm and a Thickness of about 3 mm.
  • a food 8 with a certain amount of water, here e.g. in the form of a fresh, still raw chicken breast.
  • the shell according to Fig. 1 may have a size of e.g. 20 cm x 13.5 cm have one circumferential margin of 1 cm width included.
  • the height of the shell may e.g. 4 cm or 6 cm.
  • the valve 5 is shown in Fig. 1 in the closed state, in which the membrane 6 rests on the sealing surface 7. As soon as an overpressure occurs inside the shell, the membrane 6 lifts off from the sealing surface 7, as shown in FIG.
  • the valve is then permeable in the direction from the inside to the outside. In the opposite direction, ie outside pressure or negative pressure inside, the valve can not open. It thereby prevents the penetration of outside air, dirt or the like into the packaging shell.
  • the valve opens already at a Kochduck in the shell of 3 ⁇ 1 mb and closes automatically again when the internal pressure has dropped to about 0.5 mb. But it could also be used a valve, which opens, for example, only so around 10 mb or even higher.
  • the valve opening itself is relatively small and is only about 1 mm 2 . It thus has a relatively large flow resistance.
  • the packaging according to FIG. 1 can be immediate be used as a sales and or transport packaging, with the purpose of keeping fresh their contents transport and sale preferably takes place in a refrigerated state.
  • a normal one Cooling to usual refrigerator temperature is sufficient here completely. Freezing would be but also conceivable and possible.
  • the package of Fig. 1 can now be used as it is, i. especially without cutting, for Purpose of cooking the food 8 from the raw state or even the Regenerating the food from a precooked state out into one Microwave oven are pushed.
  • the packaging is for this purpose with a on their Provided with appropriate content by means of which e.g. the Heating power of the microwave oven and the required cooking time are specified.
  • valve 5 opens then more or less immediately, but the resulting steam can be at the same rate as it by heating in the microwave oven (with appropriate setting of the same) arises because of the mentioned relatively high flow resistance of the Valve opening does not escape from the packaging. It therefore forms in the packaging a steam storage situation in which the temperature above 100 ° C and the pressure above the Ambient pressure increases. The packaging will thereby also inflate. These Steam storage situation is desired, but in particular the cooking is done raw and one Own contribution of water contained food as in the present case of the Chicken breast 8 under such conditions quickly and gently within only a few minutes. The valve 5 comes here a limiting the excess pressure in the packaging and / or reducing function too.
  • valve 5 and in particular the membrane 6 is now formed so that the latter below the effect of the high temperature during the steam storage phase at least modified so far that the valve can not close anymore. At least it should close of the valve immediately after heating until reaching a consumption temperature remain under.
  • valve 5 can not close or no longer equal, so that the pressure is not only completely degrade, but that afterwards also a negative pressure in the Packaging can not arise.
  • the excess pressure during the steam stagnation phase bloated packaging can thereby restore its original shape as much as possible accept. It can also, because it is essentially ambient pressure, safe be opened for the purpose of removing the food.
  • the desired change can be made the valve characteristics during heating e.g. by using a Plastic material can be achieved for the membrane, which is above a certain Temperature deformed, so that the membrane can not close properly.
  • a suitable material for the membrane comes in particular 50 microns shrink PET film with a Deformation temperature between 60 ° and 70 ° and a fairly pronounced degree of deformation in question.
  • a round initial shape is characterized by the heat to a pronounced shrunk oval.
  • PAN polyacrylonitrile
  • the deformation occurs in the Heating in a 700-Watt microwave oven already after about 2 minutes on, during the Cooking or cooking process usually takes more than 3 minutes on average. Both times vary with the filling weight.
  • Another material that is also eligible is 50 ⁇ m polypropylene, However, which deforms only from about 160 ° C substantially by bending.
  • the membrane 5 would be used e.g. assume a curved shape as shown in Fig. 2 and then more or even less. For the deformation process, however, with this material longer time, which comes up to the time that the heating process takes in total.
  • the inventive packaging and the inventive method are also suitable for the preparation of baked goods such as cakes or the like, in which case the preparation time starting from the raw dough in a microwave oven is also only a few minutes. It is possible, for example, 3 minutes at 700 watts of furnace power, the preparation time of course with the amount of filling and the microwave power varies.
  • the following is a recipe is given, as it has been found to be particularly suitable for the preparation of a batter cake in the inventive package: No. raw materials Weight (g) % 1 sugar 110 23.08 2 butter 60 12.59 3 egg 57 11.96 4 Flour 120 25.18 5 vanilla sugar 6 1.26 6 baking powder 2 0.42 7 milk 100 20.99 8th Bestfoods Ingredients Art. 3422 Base cold-swelling 10 2.10 9 salt 0.5 0.10 10 Hamulsion MFC 8th 1.68 11 Apple pectin (Dr. Oetker) 3 0.63 Total 476.5 100
  • the above recipe is to be understood as a basic formulation, which is characterized by different To further develop, vary and refine gifts. As additions come into question especially cocoa powder, flavors such as e.g. Lemon flavor and / or fruits. In principle, even yeast cakes and pastries, baked snacks are sweet and salty as well as soft bread like toast bread.
  • the dough according to the above recipe is in the cooled state (refrigerator tempering), relatively tight, so that it does not flow around in the packaging.
  • cooled state refrigerator tempering
  • starch system To a good, lasting Homogeneity contributes to the addition of the cold-swelling and neutral-tasting starch system according to no. 8 at. This also prevents segregation of components in the raw as in the baked condition.
  • the starch system also binds well to those used according to No. 7 Liquid in raw storage condition.
  • the baking powder according to No. 6 supports the blowing agent as the rapid rising of the dough during heating in the microwave, again a Steam storage situation occurs.
  • the hydrocolloid mixture is used according to No.
  • the binder Apple pectin according to no. 11 finally serves to retain the moisture contained in the dough during the process of the heating (not already in the cold state) tie, this thereby largely in Dough and the development of large volumes of steam during the "steam baking" in to avoid the packaging.
  • the cake resulting from the above recipe is airy and fine pored. Compared this occurs with conventional ready-made doughs, as they are currently available in trade, during "steam baking" a strong bubble development and the resulting Surface of the finished cake looks coarse and porous.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Package Specialized In Special Use (AREA)
  • General Preparation And Processing Of Foods (AREA)
  • Cookers (AREA)
  • Packages (AREA)
EP00810671A 1999-08-09 2000-07-27 Lebensmittelverpackung mit Ventil und Zubereitungsverfahren für Lebensmittel Expired - Lifetime EP1076012B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DK00810671T DK1076012T3 (da) 1999-08-09 2000-07-27 Levnedsmiddelemballage med ventil og fremgangsmåde til tilberedning af levnedsmidler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH145799 1999-08-09
CH145799 1999-08-09

Publications (2)

Publication Number Publication Date
EP1076012A1 EP1076012A1 (de) 2001-02-14
EP1076012B1 true EP1076012B1 (de) 2004-09-22

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Family Applications (1)

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EP00810671A Expired - Lifetime EP1076012B1 (de) 1999-08-09 2000-07-27 Lebensmittelverpackung mit Ventil und Zubereitungsverfahren für Lebensmittel

Country Status (10)

Country Link
US (1) US6380524B1 (da)
EP (1) EP1076012B1 (da)
JP (1) JP4248737B2 (da)
AT (1) ATE276936T1 (da)
BR (1) BR0003459A (da)
CA (1) CA2314951C (da)
DE (2) DE29918753U1 (da)
DK (1) DK1076012T3 (da)
ES (1) ES2230051T3 (da)
NL (1) NL1013985C1 (da)

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JPH088996Y2 (ja) 1991-11-01 1996-03-13 株式会社柏原製袋 食料品用包装袋
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WO1999032373A1 (de) 1997-12-18 1999-07-01 Karl Keller Lebensmittelverpackung und garverfahren für lebensmittel
GB9726600D0 (en) * 1997-12-18 1998-02-18 Linpac Plastics Int Packaging materials and packaging trays
US5989608A (en) * 1998-07-15 1999-11-23 Mizuno; Maki Food container for cooking with microwave oven

Also Published As

Publication number Publication date
EP1076012A1 (de) 2001-02-14
CA2314951C (en) 2007-06-05
US6380524B1 (en) 2002-04-30
CA2314951A1 (en) 2001-02-09
DE50007857D1 (de) 2004-10-28
BR0003459A (pt) 2001-03-20
JP4248737B2 (ja) 2009-04-02
JP2001072143A (ja) 2001-03-21
NL1013985C1 (nl) 2000-01-28
DK1076012T3 (da) 2005-01-31
DE29918753U1 (de) 2000-02-17
ES2230051T3 (es) 2005-05-01
ATE276936T1 (de) 2004-10-15

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