WO2011041876A1 - Film de couvercle-joint d'étanchéité repositionnable activé - Google Patents

Film de couvercle-joint d'étanchéité repositionnable activé Download PDF

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Publication number
WO2011041876A1
WO2011041876A1 PCT/CA2010/000657 CA2010000657W WO2011041876A1 WO 2011041876 A1 WO2011041876 A1 WO 2011041876A1 CA 2010000657 W CA2010000657 W CA 2010000657W WO 2011041876 A1 WO2011041876 A1 WO 2011041876A1
Authority
WO
WIPO (PCT)
Prior art keywords
film
package
container
peripheral edge
produce
Prior art date
Application number
PCT/CA2010/000657
Other languages
English (en)
Inventor
Christian Von Glasow
Michael Allen Taylor
Original Assignee
Ultraperf Technologies Inc.
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 Ultraperf Technologies Inc. filed Critical Ultraperf Technologies Inc.
Priority to CA2813053A priority Critical patent/CA2813053A1/fr
Publication of WO2011041876A1 publication Critical patent/WO2011041876A1/fr
Priority to US13/440,789 priority patent/US20120187122A1/en

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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
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2068—Means for reclosing the cover after its first opening
    • B65D77/2096—Adhesive means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B7/00—Closing containers or receptacles after filling
    • B65B7/16—Closing semi-rigid or rigid containers or receptacles not deformed by, or not taking-up shape of, contents, e.g. boxes or cartons

Definitions

  • This description relates to packaging for food. More particularly, the present specification relates to lidding films, to methods of making such, and to packages sealed with lidding films.
  • PET polyethylene terephthalate
  • Such commercial (produce) packaging is typically made of a tub section such as a clear plastic tray, closed with a rigid, clear plastic lid. A plastic shrink band is placed around the lid and upper section of the tray to ensure package integrity.
  • the production of such PET packages which involve the closing of the lid and the placement of the shrink band are however typically quite expensive, resource and labor intensive.
  • Produce quality and shelf life can be enhanced by sealingly enclosing the produce in a package that is capable of controlled respiration such that given levels of certain gases such as oxygen, carbon dioxide and water vapour (moisture) are maintained inside the package at least until opening of the package.
  • a package is capable of modifying its interior atmosphere by providing a controlled ingress and egress of certain gases; generally referred to as Modified Atmosphere Packaging (MAP).
  • MAP Modified Atmosphere Packaging
  • the packaging solution herein disclosed proposes a lidding film which is seal activated and positionable over any typical PET tray, thereby removing the need for a lid and shrink band typically used in the prior art.
  • a package for distributing and storing produce comprising: a container for holding produce, the container comprising a peripheral edge defining an opening into the container; a film for being positioned onto the peripheral edge of the container to close the opening; and an adhesive material for providing an airtight seal between the film and the peripheral edge upon being activated once the film has been positioned to cover the opening; and wherein upon being activated, the adhesive material populates both the peripheral edge and the film, the film thereby being repositionable onto the peripheral edge to reclose the opening of the container once the airtight seal has been broken upon initial opening of the package.
  • a lidding film for installation over a peripheral edge of a container to be loaded with produce, to form a package
  • the lidding film comprising: a film for being positioned onto the peripheral edge, to close the container once loaded with the produce and to form an airtight seal with the peripheral edge upon an activation of an adhesive material, the adhesive material being provided between the film and the peripheral edge; and wherein the activation of the adhesive material populates both the peripheral edge and the film, the film thereby being repositionable onto the peripheral edge to allow the container to be reclosed once the airtight seal has been broken upon the package being initially opened.
  • the term “produce” is intended to refer to any perishable food, such as fresh fruits and vegetables, or any non- consumable produce which has a limited lifetime before degradation or decomposition, such as flowers.
  • “Produce” is also intended to comprise non- perishable food such as cookies, candies, nuts, or any non-consumable produce that typically has an extended lifetime before degradation or decomposition; or at least longer than the time taken until final distribution or consumption for example.
  • “produce” is intended to present a given respiration rate which is to be taken into consideration in designing a package in order to maximize produce shelf life.
  • shelf life is intended to refer to the time until the produce is no longer suitable for consumption and/or presentation to customers and shall be discarded. In one example, this is the time until the fresh produce presents fully-ripe or over-ripe characteristics, whichever the case may be.
  • micro-perforations refer to perforations having a well-defined area which allow a controlled transmission of gases through the package.
  • controlled respiration or “controlled respiration rate” is intended to refer to the control of the amount or type of gas that is allowed to pass through a material.
  • a sealed container made of such breathable material is able to control the amount of humidity (gaseous water particles), oxygen and, or carbon dioxide which is allowed to enter and escape from its interior volume, based on a produce respiration rate (i.e. the produce's consumption rate of Oxygen and production rate of Carbon Dioxide for example).
  • Produce also referred to as foodstuff
  • the controlled respiration rate of the container being in accordance with the produce respiration rate.
  • the controlled respiration provided by a gas permeable material is dependent on its specific design, and more particularly on the design of the micro-perforations in the material. These micro-perforations are shaped, positioned and sized to allow such breathing to take place. Such a control on the gazes which are permitted to enter and escape the sealed container similarly provides for the control of the internal pressure and humidity level inside such containers.
  • the package is able to keep its interior gaseous environment different from the exterior gaseous environment (e.g., oxygen levels can be lower inside than outside the package; an amount of water molecules can also be kept higher inside the container; or any other gaseous combinations).
  • a specifically designed breathable package is thus able to maintain an interior modified atmosphere (MA) suitable to slow aging and degradation of produce stored therein.
  • MA interior modified atmosphere
  • FIG. 1 is a schematic side view of a package with a lidding film in accordance with an embodiment
  • Fig. 2 is a schematic cross-sectional view of the lidding film of Fig. 1 ;
  • Fig. 3 is a method for sealing a container loaded with produce with a lidding film in accordance with an embodiment
  • FIG. 4 is a picture of a package in accordance with an embodiment, with a lidding film sealed and not yet peeled off;
  • Fig. 5 is another picture of the package of Fig. 4 in accordance with an embodiment where the lidding film is partly peeled off.
  • a produce package 10 comprising a container 12 for holding fresh produce 16.
  • the container 12 has a peripheral edge 20 (also referred to as a lip, a land or a flange) defining an opening 14 usable to access an interior of the container 12 to store the produce 16 therein.
  • the package 10 has a lidding film 18 (also known as lidding stock) positioned over the peripheral edge 20 of the container 12.
  • An adhesive material (not shown) is also provided between the lidding film 18 and the peripheral edge 20.
  • the adhesive is formulated to provide an airtight seal between the lidding film 18 and the peripheral edge 20 upon being activated once the produce 16 has been loaded therein and the lidding film 18 is positioned over the peripheral edge 20 accordingly.
  • Such an airtight seal maintains an integrity of the produce 16 inside the package 10, at least during the distribution time and until the package 10 is initially opened by breaking the airtight seal.
  • the adhesive material is already provided over either one or both of the lidding film 18 and the peripheral edge 20 of the container 12.
  • the airtight seal is only formed upon initial positioning of the lidding film to close the container 12 and activating the adhesive properties of the adhesive material. This step is performed for example, during a distribution process, as later described. At the time of the initial application of the adhesive material between the film and the peripheral edge, the adhesive material has little or no adhesive properties.
  • the adhesive material populates both the peripheral edge 20 and the lidding film 18.
  • the lidding film is able to be repositioned onto the peripheral edge 20 to reclose the opening , 14 of the container 12 after the airtight seal has been broken at an initial opening of the package 10, via a first peeling off of at least a portion of the lidding film from the container 12.
  • the package 10 is first opened by peeling at least a portion of the lidding film 18 off from the peripheral edge 20, breaking the airtight seal in order to be able to access the produce 16 via the opening 14 of the container 12. This is typically done by a consumer having purchased the produce package 10.
  • a coloured sticker or any other type of opening indicator is provided on the package 10.
  • a tab extending as a protruding portion of the lidding film 18 or of the container 12 may be provided to show a user how to open the package 0, and allow its opening via a grabbing and pulling of such a tab to peel the lidding film 18 away from the peripheral edge 20.
  • a tamper evident colored sticker or other type of tamper evident indicator is positioned and sealed onto a portion of the container 12 once the package 10 sealed.
  • a tamper evident indicator i.e., an indication
  • One example is an adhesive strip of about 3/8-1/2" wide x 2-3" long applied over a corner of the container 12 which also has the above-described tab. The strip, being sealed onto the lidding film 18 on the corner of the container 12, over the tab and down over the corner onto the container 12 below the edge.
  • a printing is provided onto the strip so as to indicate its purpose.
  • the container 12 can take various forms, such as any recipient having an opening 14, typically an upper opening, a tub-like container, a box-like container, a can-like container, a tray, a plate, and the like.
  • the container 12 is shaped to be stackable onto other like container.
  • the container 12 is a made of a clear rigid plastic, or any other translucent polymer material.
  • the lidding film 18 is a film made of a transparent material such as a polymer, cellulose, corn or starch-based material.
  • the lidding film 18 can however be made of various polymer structures, such as any number or combinations of specific polymer structures suitable for food contact: polypropylene, polyethylene or combination of polyethylene and polypropylene for example, or of a paper-base (i.e. such as cardboard or wax paper) and plastic combination for example.
  • the lidding film 18 has a thickness varying from about 25 to about 175 microns.
  • only a portion of the lidding film 18 is peelable from the peripheral edge 20 of the container 12 in order to ensure that the lidding film 18 is not completely removed there from, thereby facilitating the reclosing and resealing of the package 10.
  • the package 10 comprising a non-breakable sealant (not shown) over a portion of the peripheral edge 20, in addition or alternatively to the adhesive material previously described. This non-breakable sealant section thereby prevents complete peeling of the lidding film 18.
  • the lidding film 18 is printable and thus has a printing (not shown) in one embodiment, on an interior or an exterior portion thereof. Such printing is, for example, to provide produce labelling information such as produce description, a producer, distributor or vendor identification, a price, or any other useful information.
  • the lidding film 18 is micro-perforated to provide a controlled respiration appropriate for the produce 16 stored inside the container 12.
  • the lidding film 18 is gas permeable and is airtight sealed to the peripheral edge 20, the overall package 10 is capable of controlled respiration through the lidding film 18.
  • Characteristics of the micro perforations provide for the type and/or an amount of gas allowed to enter and to be released out of the package 10. For example, such micro-perforations are able to keep oxygen and carbon dioxide levels inside the package 10 at constant levels although the produce 16 consumes oxygen and generates carbon dioxide at a given rate.
  • the package 10 is able to maintain a defined controlled respiration rate, or has given barrier properties which are capable of controlling an environment of the produce inside the package.
  • the controlled respiration and the barrier properties offered by the package are designed in order to maximize shelf life of the produce 16.
  • FIG. 2 shows a cross-sectional schematic view of a specific embodiment of a lidding film 18 having a base layer 24, printing 28, an adhesive layer 26, micro-perforations 22, and additives 29. It is noted that the printing 28, the adhesive layer 26, the micro-perforations 22, and the additives 29 are all each optional.
  • the micro-perforations 22 have a diameter in the order of about 30 to about 150 microns. In another instance, the micro- perforations 22 have a diameter from about 30 to about 90 microns in size, whereas in yet another instance, the diameters range from about 30 to about 60 microns. In some instances, the distribution of the micro-perforations 22 is uniform over the entire surface of the lidding film 18, or only a given portion thereof, such as a center or middle-portion for example. In other instances, the micro-perforations 22 are grouped over a specific area.
  • the size, position, and distribution of the micro-perforations 22 are dependent on the characteristics of the produce 16 and/or of the container 12. For example, a respiration rate of the produce 16 as well as a quantity of produce 6 in the container 12 is considered. Other characteristics which are known to have an incidence on a type and an amount of gas transfer(s) to be allowed and maintained by the lidding film 18 are optionally considered in order to provide an optimal conservation environment for the produce 16. Other non-limiting characteristics are optionally considered in designing the micro-perforations, such as: produce moisture retention, ideal moisture levels, a shape, size or weight of the produce, and the like.
  • the printing 28 is applied in one embodiment by simply printing onto the base layer 24 to represent printed text or an image.
  • An ink suitable for proper adherence to the base layer 24 is used, such as any suitable food-safe inks.
  • the base layer 24 is as the lidding film 18 described above in reference to Fig. 1.
  • the base layer 24 is a single layer of film material.
  • base layer 24 is formed by the co-extrusion of multiple films onto one another.
  • the adhesive layer 26 is provided on a surface of the base layer 24 intended to come into contact with the peripheral edge 20 (refer to Fig. 1).
  • the printing 28 can be comprised between the base layer 24 and the adhesive 26 in another instance.
  • the adhesive layer comprises an adhesive material as desribed above in reference to Fig. 1 .
  • an adhesive material is suitable for food contact and ingestion and is formulated to allow removal and re- adherence as described above.
  • the adhesive layer 26 is optional and is provided, in one embodiment, on the container 12 instead; e.g., at the peripheral edge 20 thereof (Fig. 1).
  • Non-limiting examples of seal-activated adhesive material which are used include either water or solvent based adhesives; acrylic or rubber emulsions such as soluble rubber; or any other non-permanent adhesives for example; any food-grade approved adhesive compositions, which are adapted to adhere to a variety of surfaces such as paper, corrugate, metals, glass, vinyl, foam, fabric, polystyrene, polypropylene, polyethylene, paper, or corrugate under any given activation conditions such as specific cold, hot (heat), damp or dry conditions, specific wavelength radiation and the like.
  • the adhesive material is chosen to be a transparent, non- tacky and flexible film composition, such as ethyl vinyl acetate (EVA), maleic anhydride (MAH), ethyl acetoacetate (EAA) and Ethylene methyl acetate (EMA), or any other acrylates.
  • EVA ethyl vinyl acetate
  • MAH maleic anhydride
  • EAA ethyl acetoacetate
  • EMA Ethylene methyl acetate
  • the additive compounds 29 are optionally added to the base layer 24.
  • the additive compound 29 can additionally or alternatively be added to the adhesive layer 26.
  • Such additive 29 is intended to be used for example, to provide a control of a ripening rate of the produce stored inside the container, or to improve translucence of the container by controlling a fogging effect occurring from the moisture level inside the container.
  • Non-limiting examples of additives which are optionally used include food grade anti-fog agents, ripening agents such as food grade ethylene absorption additives, and any other agent for altering an interior environment composition of the package 10, so as to impact on either or both of the produce and the an overall visual aspect associated with the package 10.
  • FIG. 3 there is shown a method 40 for sealing a lidding film onto a container in accordance with an embodiment.
  • step 42 a container is provided and loaded with produce.
  • the container has a peripheral edge forming an opening thereof, via which the produce is loaded and unloaded for example.
  • the produce can be any produce, perishable food or non- perishable, such as nuts, candies, cookies for example.
  • a quantity and a type of the produce are typically used to establish adequate or optimal respiration rates according to which the produce is best kept.
  • a lidding film is positioned over the opening and onto the peripheral edge of the container.
  • Either one of both of steps 42 and 44 involve providing a not yet activated adhesive material (i.e. the adhesive material does not present any, or very limited, adhesive property at this time), to the peripheral edge and the lidding film, respectively.
  • a not yet activated adhesive material i.e. the adhesive material does not present any, or very limited, adhesive property at this time
  • step 46 the adhesive material present between the lidding film and the peripheral edge is now activated such that the adhesive properties are rendered operative to seal the lidding film to the peripheral edge and over the opening, effectively lidding the container with the produce loaded therein. Upon such activation, an airtight seal is formed between the lidding film and the peripheral edge.
  • step 46 the adhesive material, upon being activated, populates both the lidding film and the peripheral edge such that the lidding film is peelable and is subsequently repositionable to reclose the opening of the container after the breaking of the airtight seal at initial opening of the package.
  • step 46 involves the use of an automatic tray sealer which automatically seals the lidding film onto the peripheral edge of the container.
  • the adhesive material is formulated such that after initial opening of the package via an initial at least partial removal of the lidding film, the lidding film is re-sealed over the opening by applying a slight pressure thereto over the peripheral edge.
  • the method 40 involves any further step and alternative which is suitable to arrive at a final package as described hereinabove in relation to Figs. 1 and 2.
  • Fig. 4 shows an example of an empty package 50, with the lidding film 18 sealed to the peripheral edge 20 of the container 12, and such that the empty package 50 has not yet been initially opened by initial peeling off of the lidding film 18 from the peripheral edge 20.
  • the tab 52 is for being grabbed in order to pull at least a portion of the lidding film 18 away from the peripheral edge 20 of the container 12 to open the empty package 50, as shown in Fig. 5, where the lidding film 18 is has been partly peeled off from a portion of the peripheral edge 20.
  • the opening 14 defined by the container 12 allows access to the interior of the package 50.
  • the tab 52 is also usable to reposition the lidding film 18 over the peripheral edge 20 for closing and resealing the container 12 by adherence with the peripheral edge 20.
  • both the peripheral edge 20 and the side of the lidding film 18 thereover are coated with an amount of adhesive (not shown), the lidding film 18 is repositionable onto the peripheral edge 20 without having to be exactly realigned as when initially sealed during the manufacturing process.
  • FIGS. 4 and 5 show an empty package 50 for exemplary purposes, it is understood that produce (not shown) are to be stored in such a package 50.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Packages (AREA)

Abstract

La présente invention porte sur un emballage pour distribuer et stocker des produits, lequel emballage comprend : un récipient pour contenir des produits, le récipient comprenant un bord périphérique définissant une ouverture à l'intérieur du récipient ; un film destiné à être positionné sur le bord périphérique du récipient pour fermer l'ouverture ; et un matériau adhésif pour réaliser un joint étanche vis-à-vis de l'air entre le film et le bord périphérique lorsqu'il est activé une fois que le film a été positionné afin de couvrir l'ouverture ; et dans lequel, lorsqu'il est activé, le matériau adhésif peuple tout à la fois le bord périphérique et le film, le film étant ainsi repositionnable sur le bord périphérique de façon à refermer l'ouverture du récipient une fois que le joint d'étanchéité à l'air a été rompu lors de l'ouverture initiale de l'emballage.
PCT/CA2010/000657 2009-10-06 2010-04-28 Film de couvercle-joint d'étanchéité repositionnable activé WO2011041876A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CA2813053A CA2813053A1 (fr) 2009-10-06 2010-04-28 Film de couvercle-joint d'etancheite repositionnable active
US13/440,789 US20120187122A1 (en) 2009-10-06 2012-04-05 Repositionable lidding film- seal activated

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US27828409P 2009-10-06 2009-10-06
US61/278,284 2009-10-06

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US13/440,789 Continuation US20120187122A1 (en) 2009-10-06 2012-04-05 Repositionable lidding film- seal activated

Publications (1)

Publication Number Publication Date
WO2011041876A1 true WO2011041876A1 (fr) 2011-04-14

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Application Number Title Priority Date Filing Date
PCT/CA2010/000657 WO2011041876A1 (fr) 2009-10-06 2010-04-28 Film de couvercle-joint d'étanchéité repositionnable activé

Country Status (3)

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US (1) US20120187122A1 (fr)
CA (1) CA2813053A1 (fr)
WO (1) WO2011041876A1 (fr)

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WO2015103176A1 (fr) * 2013-12-30 2015-07-09 Avery Dennison Corporation Couvercle refermable simplifié pour un plateau
DE102014109760B4 (de) * 2014-07-11 2018-06-28 Melitta Single Portions Gmbh & Co. Kg Vorrichtung und Verfahren zur Zubereitung eines Brühgetränks
DE102014109761B4 (de) 2014-07-11 2020-07-09 Melitta Single Portions Gmbh & Co. Kg Vorrichtung und Verfahren zur Zubereitung eines Brühgetränks
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WO2020047631A1 (fr) * 2018-09-05 2020-03-12 Nok Participações Ltda Matériau d'enveloppement de produits agricoles et procédé de production d'un matériau d'enveloppement de produits agricoles
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US11117727B2 (en) * 2019-05-29 2021-09-14 Mission Produce, Inc. System and method of storing produce
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CA2813053A1 (fr) 2011-04-14
US20120187122A1 (en) 2012-07-26

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