EP1862398A1 - Emballage d'aliments surgeles - Google Patents

Emballage d'aliments surgeles Download PDF

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Publication number
EP1862398A1
EP1862398A1 EP06076142A EP06076142A EP1862398A1 EP 1862398 A1 EP1862398 A1 EP 1862398A1 EP 06076142 A EP06076142 A EP 06076142A EP 06076142 A EP06076142 A EP 06076142A EP 1862398 A1 EP1862398 A1 EP 1862398A1
Authority
EP
European Patent Office
Prior art keywords
web
frozen food
package according
food package
tray
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Withdrawn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
EP06076142A
Other languages
German (de)
English (en)
Inventor
Derek Ernst Haycock
Malcolm John Mcbride
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.)
Birds Eye Ipco Ltd
Original Assignee
Birds Eye Ipco Ltd
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 Birds Eye Ipco Ltd filed Critical Birds Eye Ipco Ltd
Priority to EP06076142A priority Critical patent/EP1862398A1/fr
Publication of EP1862398A1 publication Critical patent/EP1862398A1/fr
Withdrawn legal-status Critical Current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
    • 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
    • B65D81/18—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 providing specific environment for contents, e.g. temperature above or below ambient
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0006—Upper closure
    • B65D2251/0031—Membrane
    • 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
    • B65D2251/00—Details relating to container closures
    • B65D2251/0003—Two or more closures
    • B65D2251/0068—Lower closure
    • B65D2251/0093—Membrane

Definitions

  • This invention relates to improved frozen food packaging and a method for the preparation of food.
  • Frozen food packaging known in the art comprises a tray having a base and sides, a frozen food item supported on the said tray and a web sealing the frozen food item to the tray, the web being transparent to visible light.
  • the transparent web renders the frozen food packaging more attractive to the consumer and assists the consumer to make their choice of food item when the frozen food packaging is displayed by the distributor in freezers by presenting the frozen food item in a clear and visible format.
  • One problem with the known art in frozen food packaging is that water vapour tends to condense and then freeze on the upper and exterior surface of the web thereby obscuring the view of the frozen food item to the consumer.
  • a second web sealing the first (prior art) web on the tray, wherein the first and second webs are not in thermal contact thereby to define an inter-web space occupied with one or more gases.
  • the second web limits the amount of water vapour in the inter-web space which can subsequently condense on the exterior surface of the first web.
  • the temperature of the second web will tend towards ambient temperature.
  • a frozen food package comprising:
  • the frozen food package further includes a tray having a base and sides, the tray having a daily water vapour transmission rate less than 300 g/m 2 for a 25 micron thick film; wherein the frozen food item is supported on the base of the said tray; the first web seals the frozen food item on the tray; and the second web at least partially seals the first web on the tray.
  • the water vapour transmission rate values provided hereinabove are for room temperature (20 degrees centigrade).
  • the daily water vapour transmission rate of the tray and/or first web and/or second web is less than 200, more preferably less than 150, most preferably less than 50 g/m 2 for a 25 micron thick film at room temperature (20 degrees centigrade).
  • the tray and/or first web and/or second web may comprise amorphous polyethylene terephthalate, polypropylene, poly(lactic acid), poly(hydroxyalkanoate) or mixtures thereof.
  • the tray material and/or first web and/or second web may be a laminated material.
  • the gas pressure between the first web and the frozen food item may be less than one atmosphere.
  • the first web may perform the additional function of securing the frozen food item to the tray thereby to prevent relative movement of the frozen food item and tray and any consequent damage of the frozen food item. Furthermore such an embodiment minimises build-up of water ice on between the first web and frozen food item.
  • the one or more gases may comprise less than 20gm -3 , preferably less than 10gm -3 , most preferably less than 2gm -3 water.
  • one of the one or more gases is air.
  • the frozen food package may additionally comprise a desiccant within the inter-web space thereby to minimise and maintain at a minimum the volume of water vapour in the inter-web space.
  • the second web may be removable from the package independently of the first web.
  • the frozen food package may additionally comprise an exterior packaging element comprising the second web, the exterior packaging element at least partially surrounding the frozen food item and first web.
  • an exterior packaging element comprising the second web, the exterior packaging element at least partially surrounding the frozen food item and first web.
  • the first web may at least partially self-detach when the frozen food packaging, less the second web, is heated to a temperature of at least 60, preferably 80 and most preferably 100 degrees centigrade.
  • the second web may additionally comprise a valve.
  • the valve may be a one-way valve or two-way valve or it may comprise one or more apertures. Inclusion of such a valve permits the pressure within the inter-web space to equalize with ambient pressure. In the absence of such a valve, should the ambient temperature during sealing of the second web be higher than the temperature of the display freezer, any gases in the inter-web space will contract and the second web will bow inwardly towards the first web. Not only is this unattractive to the consumer but should the first and second webs touch, then thermal contact would be made and ambient water vapour may start to condense onto the exterior surface of the second web.
  • a method of preparing food comprising the steps of:
  • the heating step is conducted in a traditional or microwave oven.
  • the tray and/or first web and/or second web may comprise amorphous polyethylene terephthalate, polypropylene, poly(lactic acid), poly(hydroxyalkanoate) or mixtures thereof.
  • the tray material and/or first web and/or second web may be a laminated material. Typical web thicknesses are in the range 15-50 microns and for the tray 500-1200 microns. Daily water vapour transmission rates are less than 300 g/m 2 for a 25 micron thick film at room temperature (20 degrees centigrade).
  • the water vapour transmission value of a material may be measured according to ASTM F 1249: Standard Test Method for Water Vapour Transmission Rate Through Plastic Film and Sheeting Using a Modulated Infrared Sensor.
  • first and second webs may be coated on one or both surfaces with a low surface energy material such as fatty acid esters (anti-fogging agent).
  • a low surface energy material such as fatty acid esters (anti-fogging agent).
  • Typical frozen food items suitable for the invention include raw meats, peas, spinach, sauces and ready meals.
  • Food may be prepared from the frozen food packaging of the invention by:
  • Heating may be by either conventional or microwave oven.
  • Figure 1 shows a 500 micron thick amorphous polyethylene terephthalate tray (101) having a base and sides and supporting on its base a frozen food item (102) which comprises a ready meal. The sides of the tray project beyond the height of the frozen food item (102).
  • a first web (103) of 15 micron thick amorphous polyethylene terephthalate extends over the tray and is heat sealed part way up the sides of the tray on first flanges (105) which project radially outwardly from the sides of the tray sealing the frozen food item (102) on the tray (101).
  • the space defined by the first web (103) and the tray (101) is occupied by the frozen food item (102) and ambient air.
  • a second web (104) of 15 micron thick amorphous polyethylene terephthalate extends over the first web and is sealed to second flanges (106) which project radially outwardly from the top of the sides of the tray sealing the first web (103) to the tray (101) thereby defining an inter-web space bounded by the first and second webs.
  • the inter-web space is occupied with air at 70% relative humidity (20 degrees Celsius).
  • the frozen food package of figure 1 may be produced by the following steps:
  • Figure 2 shows a 500 micron thick poly(lactic acid) (available from Stanelco Plc) tray (201) having a base and sides and supporting on its base a frozen food item (202) which comprises a ready meal. The sides of the tray project beyond the height of the frozen food item (202).
  • a first web (203) of 15 micron thick poly(lactic acid) is vacuum sealed over the frozen food item (202) and the base of the tray and hence conforms to the shape of the frozen food item (202) and base of the tray and is heat sealed to the circumferential region of the base of the tray sealing the frozen food item (202) on the tray (201).
  • a second web (204) of 15 micron thick poly(lactic acid) extends over the first web and is sealed to flanges (205) which project radially outwardly from the top of the sides of the tray sealing the first web (203) to the tray (201) thereby defining an inter-web space bounded by the first and second webs.
  • the inter-web space is occupied with air at 70% relative humidity (20 degrees Celsius).
  • the frozen food package of figure 2 may be produced by the following steps:
  • Figure 3 shows a 500 micron thick poly(lactic acid) (available from Stanelco Plc) tray (301) having a base and sides and supporting on its base a frozen food item (302) which comprises a ready meal The sides of the tray project beyond the height of the frozen food item (302).
  • a first web (303) of 15 micron thick poly(lactic acid) extends over the tray and is heat sealed part way up the sides of the tray on flanges (305) which project radially outwardly from the sides of the tray sealing the frozen food item (302) on the tray (301).
  • the space defined by the first web (303) and the tray (301) is occupied by the frozen food item (302) and ambient air.
  • the tray (301) slides into an exterior packaging element configured as a cardboard sleeve (306) including a second web (304) of 15 micron thick poly(lactic acid) whereby the second web (306) is aligned with the first web (303) thereby permitting a consumer to view the frozen food item.
  • An inter-web space, occupied with ambient air, is defined by the boundaries of the first and second webs, and the sides of the tray.
  • the arrangement of the tray in the sleeve is such as to restrict but not prevent all flow of ambient air (and hence water vapour) into the inter-web space through an aperture, acting as a valve, between the top of the tray and the interior face of the top of the sleeve.
  • the frozen food package of figure 3 may be produced by the following steps:
  • FIG 4 shows a frozen food item (402) which comprises frozen chicken sealed from the exterior environment by a first web (403) of 15 micron thick amorphous polyethylene terephthalate which is vacuum sealed around the frozen food item (402).
  • a first web (403) of 15 micron thick amorphous polyethylene terephthalate which is vacuum sealed around the frozen food item (402).
  • Two opposing ends of the vacuum packed frozen food item are packed into two supporting members (401) comprising cardboard thereby to leave a middle portion of the frozen food item visible to the eye of a consumer.
  • the two supporting members (401) and the vacuum packed frozen food item are then sealed by a second web (404) comprising 15 micron thick amorphous polyethylene terephthalate thereby to define an inter-web space bounded by the first and second webs.
  • the inter-web space comprises ambient air.
  • the frozen food package of figure 4 may be produced by the following steps:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
EP06076142A 2006-06-01 2006-06-01 Emballage d'aliments surgeles Withdrawn EP1862398A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP06076142A EP1862398A1 (fr) 2006-06-01 2006-06-01 Emballage d'aliments surgeles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP06076142A EP1862398A1 (fr) 2006-06-01 2006-06-01 Emballage d'aliments surgeles

Publications (1)

Publication Number Publication Date
EP1862398A1 true EP1862398A1 (fr) 2007-12-05

Family

ID=37561337

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06076142A Withdrawn EP1862398A1 (fr) 2006-06-01 2006-06-01 Emballage d'aliments surgeles

Country Status (1)

Country Link
EP (1) EP1862398A1 (fr)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115624A (en) 1985-11-14 1992-05-26 Seawell Corporation N.V. Thermoplastic skin packing means
GB2251540A (en) * 1991-01-08 1992-07-15 United Biscuits Ltd "Packaging and preserving food"
US5948457A (en) * 1996-04-03 1999-09-07 Tenneco Packaging Inc. Modified atmosphere package

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5115624A (en) 1985-11-14 1992-05-26 Seawell Corporation N.V. Thermoplastic skin packing means
GB2251540A (en) * 1991-01-08 1992-07-15 United Biscuits Ltd "Packaging and preserving food"
US5948457A (en) * 1996-04-03 1999-09-07 Tenneco Packaging Inc. Modified atmosphere package

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