US20090202756A1 - Packaging with a Vent Region - Google Patents

Packaging with a Vent Region Download PDF

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Publication number
US20090202756A1
US20090202756A1 US11/719,655 US71965505A US2009202756A1 US 20090202756 A1 US20090202756 A1 US 20090202756A1 US 71965505 A US71965505 A US 71965505A US 2009202756 A1 US2009202756 A1 US 2009202756A1
Authority
US
United States
Prior art keywords
film
lacquer
packaging
portions
interface
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.)
Abandoned
Application number
US11/719,655
Other languages
English (en)
Inventor
Beth Jones
Andrew Burke
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.)
Amcor Flexibles ApS
Original Assignee
Amcor Flexibles Europe AS
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 Amcor Flexibles Europe AS filed Critical Amcor Flexibles Europe AS
Assigned to AMCOR FLEXIBLES EUROPE A/S reassignment AMCOR FLEXIBLES EUROPE A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BURKE, ANDREW, JONES, BETH
Publication of US20090202756A1 publication Critical patent/US20090202756A1/en
Abandoned 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
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/13—Hollow or container type article [e.g., tube, vase, etc.]
    • Y10T428/1324—Flexible food casing [e.g., sausage type, etc.]

Definitions

  • This invention relates to packaging of the type suitable for use with food stuff to allow the food stuff to be cooked, say in a microwave oven, with the packaging still in place.
  • Packaging of this type must form a sealed enclosure to contain the food stuff and prevent it from becoming contaminated during storage. Also, for convenience, it must be adapted to allow venting of steam from the sealed enclosure as the food stuff is cooked, without having to first pierce the packaging.
  • Various venting arrangements have been provided for microwave packaging including wax plugs, weakened seals and leak paths which all vent at increased temperatures and/or pressures.
  • An object of the present invention is to provide an improved packaging of the aforesaid type which is especially suitable for fresh foods.
  • packaging comprises polymer film with portions of the film sealed together to form an enclosure for the food stuff, said sealed portions being sealed by a film-to-film seal except in a vent region where a lacquer layer is bonded to each portion of film before said portions are sealed together with the lacquer layers cohering, the seal strength of the lacquer-to-lacquer interface being similar to that of the film-to-film interface under predetermined storage conditions, and the seal strength of said lacquer-to-lacquer interface being reduced compared with that of the film-to-film interface at temperatures above those expected under said predetermined storage conditions so that the enclosure is vented to atmosphere by a cohesive peel action in the vent region between said lacquer layers.
  • FIG. 1 illustrates packaging according to the invention
  • FIG. 2 shows a section through a vent seal of the packaging in FIG. 1 .
  • the illustrated microwave packaging comprises a sheet 1 of Orientated Polypropylene (OPP) film which is folded on itself to bring together opposite edges which are heat sealed together along a back seal 2 to form a tube.
  • OPP Orientated Polypropylene
  • the lower open end of the tubular sheet is closed by bringing together opposite portions of the lower edge and heat sealing them together to form a lower seal 3 .
  • the packaging is then filled with food stuff and the open upper end closed by bringing together opposite portions of the upper edge and heat sealing them together to form an upper seal 4 .
  • a portion 5 of the upper seal 4 incorporates a lacquer-to-lacquer interface between the two portions of the sheet 1 so as to form a peelable seal which extends across the fall width W of the seal 4 .
  • the lacquer is a coating 6 adhering to the inner face of each of the opposite portions of the sheet 1 , which may be applied by a gravure or flexo printing process in advance of the sheet being formed into the final enclosure illustrated.
  • the lacquer coating 6 comprises a colourless, coloured or opaque coating made up of resins or cellulose derivatives and a plasticizer in a solvent.
  • the resin comprises a synthetic polymeric compound physically resembling natural resin, such as polyvinyl, polystyrene or epoxy.
  • a preferred example comprises a composition of EVA based resins and a mixture of solvents comprising ethyl acetate, isopropyl acetate and hydrocarbon such as non-aromatic naptha.
  • Such a lacquer is available as “Sovereign Proxseal J9683A”comprising an EVA copolymer dispersed in a solvent mix of ethyl acetate and aliphatic hydrocarbon.
  • the properties of the seals are similar in strength at ambient, chill and freezer temperatures such as apply when the packaging is in use to store food stuff. Also, high humidity conditions caused by the food stuff within the packaging does not adversely affect the strength of the seal under ambient, chill and freezer conditions. High humidity conditions might comprise those up to 100% at 5-8° C., but typical humidity conditions comprise 85% or 95% at 5-8° C.
  • the strength of that portion of the seal 5 incorporating the lacquer coatings 6 is significantly reduced at the elevated temperatures that are generated up to 100° C. or above, the strength being only ⁇ 30 g/25 mm.
  • This reduced strength of the lacquer-to-lacquer seal is such as to allow cohesive peeling, and provides an open vent path between the two portions of the OPP sheet to allow pressurised steam and gases to escape from within the packaging.
  • the strength of the seal where the OPP sheet is sealed face-to-face without the intermediate lacquer coatings remains strong enough to hold the seal closed.
  • venting of the packaging is controlled to occur only in the lacquer coated region 5 of the upper seal 4 .
  • the seal strength of the lacquer-to-lacquer is reduced significantly at temperatures of 60° C. and above.
  • the size of the lacquered vent region 5 is selected to give an appropriated vent cross-section. If required the vent region 5 could extend the full length of the seal 4 . Alternatively, the position of the lacquered region 5 can be varied to suit the particular application and it may be located in one or more of the other seals 2 and 3 . Alternatively, multiple vent regions 5 may be provided in one or more of the seams 2 , 3 , 4 .
  • the film may comprise any one of the following: polypropylene, polyethylene, polyester, polyamide, regenerated cellulose, polylactic acid, or combination of any of the preceding.
  • the film may also comprise films with a heat seal coating.
  • the film may be adapted for modified atmosphere packaging by forming microperforations in it which are small enough to control the oxygen/carbon dioxide gas atmosphere within the bag.
  • the food stuff will have a respiration rate which is matched to the natural permeability of the film and the additional permeability of the microperforations so as to produce the required modified atmosphere within the packaging.
  • the total area of the microperforations would be too small to have any significant effect on the water vapour permeability of the film or the need to provide a separate vent.
  • the lacquer may comprise a water-based EVA lacquer or an epoxy/acrylic solvent based lacquer.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Wrappers (AREA)
  • Laminated Bodies (AREA)
  • Closures For Containers (AREA)
  • Package Specialized In Special Use (AREA)
US11/719,655 2004-11-18 2005-11-15 Packaging with a Vent Region Abandoned US20090202756A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP04257147A EP1659070B1 (en) 2004-11-18 2004-11-18 Packaging with a vent region
EP04257147.1 2004-11-18
PCT/GB2005/004393 WO2006054060A1 (en) 2004-11-18 2005-11-15 Packaging with a vent region

Publications (1)

Publication Number Publication Date
US20090202756A1 true US20090202756A1 (en) 2009-08-13

Family

ID=34930810

Family Applications (1)

Application Number Title Priority Date Filing Date
US11/719,655 Abandoned US20090202756A1 (en) 2004-11-18 2005-11-15 Packaging with a Vent Region

Country Status (16)

Country Link
US (1) US20090202756A1 (enExample)
EP (1) EP1659070B1 (enExample)
JP (1) JP2008520510A (enExample)
AT (1) ATE395270T1 (enExample)
AU (1) AU2005305678B2 (enExample)
BR (1) BRPI0517755A (enExample)
CA (1) CA2588510C (enExample)
DE (1) DE602004013797D1 (enExample)
DK (1) DK1659070T3 (enExample)
ES (1) ES2273618T3 (enExample)
NZ (1) NZ555366A (enExample)
PL (1) PL1659070T3 (enExample)
PT (1) PT1659070E (enExample)
SI (1) SI1659070T1 (enExample)
WO (1) WO2006054060A1 (enExample)
ZA (1) ZA200704870B (enExample)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140339105A1 (en) * 2007-05-10 2014-11-20 The Hillshire Brands Company Packaging for food product
US20140342057A1 (en) * 2007-05-10 2014-11-20 The Hillshire Brands Company Packaging for food product
US9988200B2 (en) * 2008-05-06 2018-06-05 The Hillshire Brands Company Packaging for food product
CN113453997A (zh) * 2019-02-28 2021-09-28 特克逊国际有限公司 塑料膜和使用该塑料膜的包装件
US20220242648A1 (en) * 2010-11-10 2022-08-04 The Hillshire Brands Company Packaged food with moisture release
US20220332491A1 (en) * 2007-05-10 2022-10-20 The Hillshire Brands Company Moisture degraded packaging seal

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202006012289U1 (de) * 2006-08-10 2007-12-13 Haver & Boecker Ohg Offener Sack aus einem schweißfähigen Material
CN104014740B (zh) * 2014-06-11 2016-08-31 武汉纺织大学 一种提高微波硬化水玻璃砂型抗吸湿性的方法
DE102015223030A1 (de) * 2015-11-23 2017-05-24 Huhtamaki Flexible Packaging Germany Gmbh & Co. Kg Folienverpackung mit in einer Siegelnaht integrierter Ventillösung
US10759578B2 (en) 2016-02-24 2020-09-01 Bemis Company, Inc. Multilayer pouch with heat-shrinkable layer

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010031348A1 (en) * 1998-12-16 2001-10-18 Wilfried Jud Sterilisible composite film
US6582123B1 (en) * 2000-01-14 2003-06-24 Tecksom International Limited Package incorporating a pressure venting feature
EP1357055B1 (fr) * 2002-04-22 2007-04-04 Saint André Plastique Emballage alimentaire comprenant au moins une zone de scellement de moindre résistance

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3655503A (en) * 1969-01-13 1972-04-11 Crown Zellerbach Corp Package of composite film with peelable, heatsealable surfaces
JP3349573B2 (ja) * 1993-12-28 2002-11-25 住友ベークライト株式会社 枝豆入り包装体
EP0890521A1 (en) * 1997-07-09 1999-01-13 Daiwa Gravure Co., Ltd. Packaging bag
JPH11139465A (ja) * 1997-11-05 1999-05-25 Toppan Printing Co Ltd 電子レンジ用包装体

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20010031348A1 (en) * 1998-12-16 2001-10-18 Wilfried Jud Sterilisible composite film
US6582123B1 (en) * 2000-01-14 2003-06-24 Tecksom International Limited Package incorporating a pressure venting feature
EP1357055B1 (fr) * 2002-04-22 2007-04-04 Saint André Plastique Emballage alimentaire comprenant au moins une zone de scellement de moindre résistance

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Rolando, T.E., Report 101,vol. 9, No. 5 (1998). Solvent-Free Adhesives. Rapra Review Reports. Online version available at: http://books.google.com/books?id=f7B7rsF3jOYC&printsec=frontcover#v=onepage&q&f=false *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140339105A1 (en) * 2007-05-10 2014-11-20 The Hillshire Brands Company Packaging for food product
US20140342057A1 (en) * 2007-05-10 2014-11-20 The Hillshire Brands Company Packaging for food product
US20220332491A1 (en) * 2007-05-10 2022-10-20 The Hillshire Brands Company Moisture degraded packaging seal
US9988200B2 (en) * 2008-05-06 2018-06-05 The Hillshire Brands Company Packaging for food product
US20180273277A1 (en) * 2010-11-10 2018-09-27 The Hillshire Brands Company Packaged food with moisture release
US20220242648A1 (en) * 2010-11-10 2022-08-04 The Hillshire Brands Company Packaged food with moisture release
CN113453997A (zh) * 2019-02-28 2021-09-28 特克逊国际有限公司 塑料膜和使用该塑料膜的包装件
US20220234810A1 (en) * 2019-02-28 2022-07-28 Tecksom International Limited Plastic film and packaging using the plastic film
EP3908535A4 (en) * 2019-02-28 2023-01-25 Tecksom International Limited PLASTIC FILM AND PACKAGING WITH THIS PLASTIC FILM

Also Published As

Publication number Publication date
ATE395270T1 (de) 2008-05-15
PT1659070E (pt) 2008-07-10
DE602004013797D1 (de) 2008-06-26
DK1659070T3 (da) 2008-09-08
NZ555366A (en) 2010-02-26
ES2273618T1 (es) 2007-05-16
WO2006054060A1 (en) 2006-05-26
SI1659070T1 (sl) 2008-10-31
JP2008520510A (ja) 2008-06-19
EP1659070A1 (en) 2006-05-24
ES2273618T3 (es) 2008-09-01
AU2005305678B2 (en) 2011-09-08
EP1659070B1 (en) 2008-05-14
AU2005305678A1 (en) 2006-05-26
ZA200704870B (en) 2008-10-29
CA2588510A1 (en) 2006-05-26
BRPI0517755A (pt) 2008-10-21
PL1659070T3 (pl) 2008-11-28
CA2588510C (en) 2013-05-21

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Legal Events

Date Code Title Description
AS Assignment

Owner name: AMCOR FLEXIBLES EUROPE A/S, DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:JONES, BETH;BURKE, ANDREW;REEL/FRAME:022452/0715

Effective date: 20090216

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION