EP2459459A2 - Sealable container, sealed container and processes for making a sealable container and a sealed container - Google Patents

Sealable container, sealed container and processes for making a sealable container and a sealed container

Info

Publication number
EP2459459A2
EP2459459A2 EP11704299A EP11704299A EP2459459A2 EP 2459459 A2 EP2459459 A2 EP 2459459A2 EP 11704299 A EP11704299 A EP 11704299A EP 11704299 A EP11704299 A EP 11704299A EP 2459459 A2 EP2459459 A2 EP 2459459A2
Authority
EP
European Patent Office
Prior art keywords
container
adhesive
peripheral flange
sealable container
sealed
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.)
Granted
Application number
EP11704299A
Other languages
German (de)
French (fr)
Other versions
EP2459459B8 (en
EP2459459B1 (en
Inventor
Craig Hardwick
Alan John Davey
David Parker
Stephen Howden
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.)
Linpac Packaging Ltd
Original Assignee
Linpac Packaging 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41819121&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2459459(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to SI201131770T priority Critical patent/SI2459459T1/en
Priority to EP22153165.0A priority patent/EP4056491A3/en
Priority to RSP20191018 priority patent/RS59226B1/en
Priority to DK14186025.4T priority patent/DK2845819T3/en
Priority to EP16174861.1A priority patent/EP3184453B1/en
Priority to PL16174861T priority patent/PL3184453T3/en
Priority to PL14186025T priority patent/PL2845819T3/en
Priority to PL11704299T priority patent/PL2459459T3/en
Priority to EP14186025.4A priority patent/EP2845819B1/en
Application filed by Linpac Packaging Ltd filed Critical Linpac Packaging Ltd
Publication of EP2459459A2 publication Critical patent/EP2459459A2/en
Priority to DKBA201400135U priority patent/DK201400135Y3/en
Priority to CY20191100063T priority patent/CY1124342T1/en
Publication of EP2459459B1 publication Critical patent/EP2459459B1/en
Application granted granted Critical
Publication of EP2459459B8 publication Critical patent/EP2459459B8/en
Priority to HRP20191497 priority patent/HRP20191497T1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • B65D81/20—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 under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
    • B65D81/2069—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 under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere
    • B65D81/2076—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 under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas in a special atmosphere in an at least partially rigid container
    • 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
    • B65D1/00—Containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material, by deep-drawing operations performed on sheet material
    • B65D1/34—Trays or like shallow containers
    • 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
    • B65D21/00—Nestable, stackable or joinable containers; Containers of variable capacity
    • B65D21/02—Containers specially shaped, or provided with fittings or attachments, to facilitate nesting, stacking, or joining together
    • B65D21/0233—Nestable containers
    • 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
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B65B51/023—Applying adhesives or sealing liquids using applicator nozzles
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/02—Applying adhesives or sealing liquids
    • B65B51/026—Applying adhesives or sealing liquids using rotating applicators
    • 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
    • B65B51/00—Devices for, or methods of, sealing or securing package folds or closures; Devices for gathering or twisting wrappers, or necks of bags
    • B65B51/10—Applying or generating heat or pressure or combinations thereof

Definitions

  • This invention relates to containers suitable for use in the packaging, storage, transportation and/or display of a product, such as a fresh food product or a medical product, and to processes for making such containers.
  • plastic containers to package, store, transport and display fresh food. These containers may be sealed with a lidding film to protect the food within the container from the surrounding environment. Additionally, the atmosphere within such containers may be modified to enhance the shelf life and/or appearance of the fresh food within the container.
  • Clear plastic containers may be made of polethylene terephthalate (PET).
  • PET polethylene terephthalate
  • the use of PET provides a high clarity product that enables a user to view readily the contents of the container.
  • Recycled PET may also be used, offering environmental and, sometimes, economical benefits.
  • it is desirable to seal clear plastic containers with a lidding film but it is difficult to attach a lidding film to PET and the sealing of a lidding film to PET is particularly sensitive to contamination.
  • PET polyethylene
  • EVA ethylene vinyl acetate
  • PET is substantially thicker than the EVA and PE layers
  • the PET/EVA/PE product may be produced by co-extrusion, lamination, extrusion coating or any other suitable technique.
  • EVA and PE have different refractive indices to PET and so the PET/EVA/PE product is of a slightly lower clarity than a non-coated PET product.
  • PET/EVA/PE product is of poorer clarity, more expensive, less recyclable and less user- friendly in the manufacturing plant.
  • environmental consequences of using a PET/EVA/PE product During the manufacture of PET/EVA/PE containers by thermo-forming, multiple containers are formed from large and often continuous sheets of PET/EVA/PE material and individual containers are cut from these large sheets.
  • Waste material is formed from those parts of the large sheets that are not used in the individual containers.
  • This waste material known as "skeletal waste” contains a mixture of PET, EVA and PE, which when recycled forms a cloudy product that cannot be used to form clear plastic containers. Since clear plastic containers are more desirable than opaque plastic containers the waste is uneconomical to recycle.
  • a sealable container comprising a base and a continuous side wall extending substantially perpendicular to the base with a peripheral flange formed along the upper, in use, edge of the continuous side wall, wherein a layer of adhesive is located on an upper, in use, surface of the peripheral flange such that a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film.
  • the layer of adhesive located on the upper surface of the peripheral flange does not extend onto the vertical surfaces of the continuous side wall and does not extend onto the base.
  • the term "adhesive" is used herein to indicate any material that enables the adhesion of the lidding film to the peripheral flange.
  • the adhesive may be a traditional adhesive, it may be a PE or PE co-polymer based material, or indeed any other suitable material as discretely applied to the peripheral flange.
  • clear plastic containers are more desirable than opaque plastic containers and therefore the base and the continuous side wall may be clear.
  • a suitable material for making the clear base and the clear continuous side wall is PET, therefore, the base and the continuous side wall may consist essentially of PET, optionally recycled PET.
  • Adhesives suitable for use in the present invention include adhesives based on a polymeric substrate, such as a hot-melt adhesive.
  • the thickness of the layer of adhesive can vary. The inventors have found that a thickness of from 20 ⁇ to 100 ⁇ is effective, and a thickness of 50 ⁇ is most effective.
  • Sealable containers according to the present invention may be sealed to produce sealed containers. Therefore, according to a second aspect of the present invention sealed containers are provided with a lidding film sealed to a sealable container as described above.
  • the atmosphere within the sealed container may be modified to enhance the shelf life and/or appearance of products packaged within the sealed container.
  • Modified atmosphere packaging may contain increased levels of oxygen or other gases. For example to package red meat, the modified atmosphere may contain increased levels of oxygen, such as from 25% to 90% of oxygen, preferably 80% oxygen. Alternatively, MAP may contain increased levels of carbon dioxide, as used to package poultry. These are examples only; there are a wide range of commercially available gas mixtures used across a wide range of foods and non-foods.
  • Lidding films suitable for use in making sealed containers according to the present invention may comprise polypropylene (PP) and/or PE. These materials may act as a seal layer in a multi-layer film, that may be formed by co-extrusion or lamination.
  • the other layers in a multi-layer structure may be chosen to impart particular properties, such as strength, resilience, gas and/or water vapour barrier properties, shrinking characteristic and UV screening.
  • the thickness of the seal layer of the lidding film can vary. The inventors have found that a seal layer thickness of from 15 ⁇ to 50 ⁇ is effective, and a thickness of 20 ⁇ is most effective.
  • the overall thickness of the lidding film is typically from 20 ⁇ to 60 ⁇ .
  • a process for making a sealable container as described above wherein the process comprises:
  • the container may be corona or plasma treated between steps a) and b) to improve adhesion of the adhesive to the peripheral flange.
  • the layer of adhesive may be applied to the upper surface of the peripheral flange by a roller, such as a silicone roller or a heated chrome roller.
  • a roller such as a silicone roller or a heated chrome roller.
  • the layer of adhesive may be applied by spray coating, by a hot melt gun or by a printing technique.
  • the inventors have found that supporting the container during the application of the layer of adhesive helps transfer an even thickness of the adhesive to the peripheral flange.
  • the inventors have found that supporting the peripheral flange is helpful in producing a superior sealable container.
  • the process for making a sealable container according to the present invention may be operated as a continuous process.
  • the containers may be supplied continuously to a production line for continuous application of the layer of adhesive.
  • the process for making a sealable container according to the present invention may also be operated as a batch process.
  • the process for making a sealable container according to the present invention may be operated as a combination of continuous and batch process steps.
  • the containers may be supplied by a batch process step and application of the layer of adhesive may operate as a continuous process step.
  • a process for making a sealed container as described above wherein the process comprises:
  • the pressure is used to fuse the lidding film to the layer of adhesive applied to the peripheral flange and thereby seal the container.
  • heat is applied simultaneously with pressure.
  • the pressure applied to the peripheral flange and the time for which the pressure is applied can vary.
  • the inventors have found that a pressure of from 30 psi to 180 psi and a period of time of from 0.5 seconds to 5 seconds is effective, and a pressure of 110 psi and a period of time of 1 second is most effective.
  • the heat applied to the peripheral flange can also vary.
  • the inventors have found that a temperature of from 105 °C to 170 °C is effective, and a temperature of 150 °C is most effective.
  • Pressure alone or pressure and heat may be applied to the peripheral flange by any process suitable for sealing the lidding film to the sealable container.
  • a sealing shoe matching the shape of the peripheral flange is used to seal the lidding film to the sealable container.
  • the process for making a sealed container according to the present invention may be operated as a continuous process.
  • the sealable containers may be supplied to a production line for provision of a layer of lidding film and application of heat to the peripheral flange.
  • the process for making a sealed container according to the present invention may be operated as a batch process.
  • the process for making a sealed container according to the present invention may be operated as a combination of continuous and batch process steps.
  • the process for making a sealed container may be carried out after the sealable container has been made and a product placed within the sealable container or the process for making the sealed container may be carried out separately from the process for making the sealable container.
  • figure 1 is a cross sectional view of a prior art tray
  • figure 2 is a flow diagram of a typical prior art thermo- forming process
  • figure 3 shows a perspective view of a tray according to the invention
  • figure 4 is a cross sectional view of a tray according to the invention.
  • figure 5 is a flow diagram of a thermo-forming process according to the invention.
  • figure 6 is a schematic partial view of a flange of a prior art tray
  • FIGS. 7A to 7E are schematic partial views of trays according to the invention.
  • FIGS. 8A, 8B and 8C are schematic top, side and front views of a tray according to the invention, including a modified denest feature;
  • figure 9A is a schematic view of a prior art tray nested into a similar tray.
  • FIG 9B is a schematic view of a tray according to the invention and including a modified denest feature, nested into a similar tray.
  • Figure 1 shows a cross sectional view of a prior art container 1 ' comprising a base 2' with ribs 6', side walls 3 ' with a peripheral flange 4' .
  • the container ⁇ is made of PET and has a thickness of for example 400-500 ⁇ .
  • the surface of the container is coated with PE film with a thickness of for example 30 to 50 ⁇ .
  • the tray comprises 1 grams of PE (i.e. 5.8%w/w) and 16.8 grams of PET (i.e. 94.2% w/w).
  • FIG. 2 is a simplified illustration of a thermo-forming process for the manufacture of PET/PE containers in which PET in the form of flakes and pellet are introduced into the system to produce the trays. The flakes and pellets are melted into sheets which are coated with a film of PE. The sheets are then moulded into trays. About 6% PET/PE waste is obtained from the extrusion of the trays. At this stage, the extruded trays are attached to each other by a web 7 which is cut out to produce individual trays with a return flange. This separation process produces about 40% web waste. Finally about 2% tray waste is produced in the act of trimming the trays at the end of the process. Extrusion waste, web waste and tray waste are contaminated with PE and cannot be recycled to produce clear products.
  • Figure 3 shows a sealable container 1 according to the invention comprising a base 2 and a continuous side wall 3 upstanding from the base 1.
  • a peripheral fiange 4 is formed along the upper edge of the continuous side wall 3.
  • a layer of adhesive 5 is located on an upper surface of the peripheral fiange 4 such that a lidding film (not shown) may be sealed to the flange.
  • a sealed space can thereby be created between the base 1 , continuous side wall 3 and lidding film.
  • Figure 4 shows a cross sectional view of a sealable container 1 according to the invention comprising a base 2 and a continuous side wall 3 upstanding from the base 1.
  • the container is preferably made of PET and has a thickness of for example 400-500 ⁇ .
  • a peripheral flange 4 is formed along the upper edge of the continuous side wall 3 and may comprise a return flange.
  • the container is not coated with a PE film as in figure 2, but instead an adhesive film 5 is applied onto an upper surface of the peripheral flange 4 such that a lidding film may be sealed to the flange.
  • the thickness of the adhesive film is preferably approximately 50 ⁇ .
  • Ribs 6 are located in the base 2 to strengthen the base of the tray.
  • FIG. 5 is a simplified illustration of a thermo- forming process for the manufacture of PET containers according to the present invention in which PET in the form of flakes and pellet are introduced into the system to produce the trays.
  • the flakes and pellets are first melted into sheets of pure PET.
  • a process according to the present invention therefore produces waste after PET extrusion which can be recycled to produce clear product, since the waste is substantially free from adhesive or PE. Trays are then formed in the PET sheet, and then subsequently, the adhesive is applied onto the flange using an adhesive applicator 8 and the trays are trimmed and separated.
  • the web waste is also substantially free of adhesive and can be recycled into the process.
  • tray waste is produced that comprises PET and adhesive.
  • the claimed process produces substantially less waste contaminated by adhesive or PE and is consequently more cost-effective since it enables the production of clear products from the aggreated recycled waste.
  • a layer of adhesive is located on an upper surface of the peripheral flange such that, at a later stage, when required, a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film.
  • top sealing film which can be a conventional lidding film as used in the industry
  • container is modified.
  • Other solutions would require expensive and complex modifications of the lid and/or the tray.
  • the resulting container has a better recyc lability and trays that are up to 3% lighter than prior art trays may be obtained.
  • a further advantage of the present invention is that the layer of adhesive located on the upper surface of the flange provides means for visually identifying the presence of a seal layer prior to seal, because the adhesive surface is visually different from the PET surface.
  • the layer of adhesive provides means for visually checking the integrity of the seal by forming a adhesive "band" that is visible through the lidding film.
  • FIG. 6 is a schematic view of a corner of a known tray design. Due to tray design, the flange is wider at the corners than along the sides of the tray. In known trays, this additional area can be utilised to create a denesting feature to aid the separation of nested trays. This is achieved by forming a recess into the tray, this recess sits onto the upper flange of the nested tray. The recess location is alternated in a sequence so it does not match the tray it is nesting against.
  • the upper surface of the peripheral flange is coated with an adhesive.
  • Some adhesives have a low tack at room temperature; however as the temperature increases, the tack level also increases. The result of this would be the locking together (or partial gluing together) of trays as the underside of the denesting recess of a (top) tray contacts the upper flange of its nested (bottom) tray.
  • the tray of the present invention may comprise at least one denesting recess located in a denesting area, whereby the denesting area is relieved relative to the upper surface of the flange, i.e. set lower than the flange level by a distance of preferably 1 mm.
  • the relieved area extends partially (for example as crescents adjacent the corners of the tray) or completely (i.e. both adjacent the corners of the tray and along the sides of the tray) along the inner periphery of the flange so that when the adhesive material is applied to the tray, the upper surface of the relieved area is not coated.
  • the relieved area is located at the corners of the tray in the shape of a crescent and the denesting recess is located in the relieved area.
  • the relieved area extends along the whole inner periphery of the flange so that the tray comprises an outer peripheral flange coated with adhesive and an inner peripheral flange, devoid of adhesive.
  • the denesting recesses are located in the relieved area so that when the adhesive material is applied to the tray, the upper surface of the denesting recess and the area surrounding the recess is not coated. As such the possibility of locking together the trays is eliminated.
  • the height of the step can be altered to adjust the separation gap between the trays.
  • a typical gap is in the region of 7 mm.
  • the distance between the upper surface of the relieved area and the base of the tray is shorter than the distance between the upper surface of the flange and the base.
  • the distance between the upper surface of the flange and the upper surface of the relieved area is approximately 1mm.
  • the width of the relieved area is approximately 1 mm.
  • the distance between the adhesive coated flange of a bottom tray and the adjacent wall of a top tray can be typically increased by approximately 1 mm (e.g. 0.84 mm for standard trays and 1.71 for trays according to the present invention).
  • the relieved area is therefore advantageous in that it prevents a first tray of the present invention to stick to second nested tray due to the distance created between the adhesive of the upper surface of the flange of the first tray and the adjacent wall of the second tray.
  • LINPAC rfresh R2-45 meat trays were prepared and tested to demonstrate the suitability of the invention for the packaging of fresh meat using a MAP system.
  • the trays were manufactured from a 500 ⁇ thick monolayer of amorphous PET sheet.
  • the formed trays were coated with an adhesive (reference BAM 2041) supplied by Beardow and Adams (Adhesives) Ltd.
  • the adhesive was applied to the flange of the tray using a Diemme Fin model SC4 roller glue spreading machine.
  • the adhesive was melted against a chrome roller with a temperature of 177 °C and applied to the tray flange via a silicone rubber roller with a temperature of 125 °C.
  • the coating equipment had a line speed of 10 m/min and the trays were coated in batches of four using an aluminium carrier designed to support the flange of each tray as they passed under the coating roller.
  • the equipment was adjusted to apply the adhesive uniformly on the flange with coating thicknesses of 50 ⁇ , 60 ⁇ , 80 ⁇ and 90 ⁇ .
  • the remainder of the tray surfaces were free from adhesive contamination.
  • the trays were sealed using a 35 ⁇ thick commercially available lidding film. This was supplied by LINPAC Packaging Limited (reference THB 267110). The trays were filled with an atmosphere of 80% oxygen and 20% carbon dioxide gas using a World Class Packaging model T200 tray sealing machine. A variety of sealing conditions were used with seal times of from 1 to 3 seconds, seal pressures of from 30 psi to 180 psi, and sealing bar temperatures of from 130 °C to 170 °C. The trays were stored for 10 days at 4 °C to simulate the packaging supply chain. The residual oxygen was then measured using a HiTec MAP 4050 gas analyser. No significant loss of oxygen concentration was noted indicating that the packs were leak free.
  • Leak tests were conducted at room temperature using a Lippke 4000 Package Test System. Leak test pressure was 50 mBar with a settling period of 30 seconds and a leak detection time of 30 seconds. The packs were again shown to be leak free as the observed pressure drop was ⁇ 2 mBar. Burst tests were conducted using the Lippke 4000 Package Test System. The rate of pressure increase was 5 mBar/second. The failure mode was failure of the top web film showing that the adhesive bond between the tray and the top web was good.

Abstract

The present application relates to a sealable container comprising a base and a continuous side wall extending substantially perpendicular to the base with a peripheral flange formed along the upper, in use, edge of the continuous side wall, wherein a layer of adhesive is located on an upper, in use, surface of the peripheral flange such that a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film. The present application further relates to a process for making said sealed container.

Description

Container
This invention relates to containers suitable for use in the packaging, storage, transportation and/or display of a product, such as a fresh food product or a medical product, and to processes for making such containers.
It is known to use plastic containers to package, store, transport and display fresh food. These containers may be sealed with a lidding film to protect the food within the container from the surrounding environment. Additionally, the atmosphere within such containers may be modified to enhance the shelf life and/or appearance of the fresh food within the container.
Clear plastic containers may be made of polethylene terephthalate (PET). The use of PET provides a high clarity product that enables a user to view readily the contents of the container. (Recycled PET may also be used, offering environmental and, sometimes, economical benefits.) However, as explained above, it is desirable to seal clear plastic containers with a lidding film, but it is difficult to attach a lidding film to PET and the sealing of a lidding film to PET is particularly sensitive to contamination.
A known solution to the problem outlined above is making the containers from PET coated with a layer of polyethylene (PE) and an intermediate layer of ethylene vinyl acetate (EVA). The PE provides a surface that a lidding film readily attaches to, thereby facilitating the production of sealed containers. Typically the PET is substantially thicker than the EVA and PE layers, and the PET/EVA/PE product may be produced by co-extrusion, lamination, extrusion coating or any other suitable technique. Although the PET/EVA/PE product produces high clarity containers, EVA and PE have different refractive indices to PET and so the PET/EVA/PE product is of a slightly lower clarity than a non-coated PET product. Additionally, use of EVA and PE incurs extra costs for two key reasons; firstly because the laminate or co-extruded layer has an intrinsic cost and secondly because, as outlined below, the internal re-processing of factory trays and "skeletal waste" is prejudiced by the presence of EVA and PE in an otherwise pure PET stream. Therefore, in comparison to a PET product, the PET/EVA/PE product is of poorer clarity, more expensive, less recyclable and less user- friendly in the manufacturing plant. There are also environmental consequences of using a PET/EVA/PE product. During the manufacture of PET/EVA/PE containers by thermo-forming, multiple containers are formed from large and often continuous sheets of PET/EVA/PE material and individual containers are cut from these large sheets. Waste material is formed from those parts of the large sheets that are not used in the individual containers. This waste material, known as "skeletal waste", contains a mixture of PET, EVA and PE, which when recycled forms a cloudy product that cannot be used to form clear plastic containers. Since clear plastic containers are more desirable than opaque plastic containers the waste is uneconomical to recycle.
An alternative route for the manufacture of food trays as described above is by means of injection moulding. Then there is no skeletal waste as described above for thermo-forming, but there is also no easy and cost-effective way to apply the layer of PE to the tray that will facilitate easy sealing to a top-film.
Accordingly, it is an object of the present invention to provide containers that overcome some or all of the problems described above.
According to a first aspect of the invention, there is provided a sealable container comprising a base and a continuous side wall extending substantially perpendicular to the base with a peripheral flange formed along the upper, in use, edge of the continuous side wall, wherein a layer of adhesive is located on an upper, in use, surface of the peripheral flange such that a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film. The layer of adhesive located on the upper surface of the peripheral flange does not extend onto the vertical surfaces of the continuous side wall and does not extend onto the base.
The term "adhesive" is used herein to indicate any material that enables the adhesion of the lidding film to the peripheral flange. The adhesive may be a traditional adhesive, it may be a PE or PE co-polymer based material, or indeed any other suitable material as discretely applied to the peripheral flange. As explained above, clear plastic containers are more desirable than opaque plastic containers and therefore the base and the continuous side wall may be clear. A suitable material for making the clear base and the clear continuous side wall is PET, therefore, the base and the continuous side wall may consist essentially of PET, optionally recycled PET.
Adhesives suitable for use in the present invention include adhesives based on a polymeric substrate, such as a hot-melt adhesive. The thickness of the layer of adhesive can vary. The inventors have found that a thickness of from 20 μιη to 100 μιη is effective, and a thickness of 50 μιη is most effective.
Sealable containers according to the present invention may be sealed to produce sealed containers. Therefore, according to a second aspect of the present invention sealed containers are provided with a lidding film sealed to a sealable container as described above. The atmosphere within the sealed container may be modified to enhance the shelf life and/or appearance of products packaged within the sealed container. Modified atmosphere packaging (MAP) may contain increased levels of oxygen or other gases. For example to package red meat, the modified atmosphere may contain increased levels of oxygen, such as from 25% to 90% of oxygen, preferably 80% oxygen. Alternatively, MAP may contain increased levels of carbon dioxide, as used to package poultry. These are examples only; there are a wide range of commercially available gas mixtures used across a wide range of foods and non-foods. There are also significant commercial volumes of controlled atmosphere packages where the gas mixture inside a sealed pack is initially air, but where the product consumes and also generates gases such that the atmosphere becomes modified by means of carefully designed and targeted film material and container material choices. This is known as controlled atmosphere packaging (CAP). A reliable and effective seal between lidding film and sealable container, capable of being effective despite contamination on the seal face, is key to MAP and CAP being effective. Lidding films suitable for use in making sealed containers according to the present invention may comprise polypropylene (PP) and/or PE. These materials may act as a seal layer in a multi-layer film, that may be formed by co-extrusion or lamination. The other layers in a multi-layer structure may be chosen to impart particular properties, such as strength, resilience, gas and/or water vapour barrier properties, shrinking characteristic and UV screening. The thickness of the seal layer of the lidding film can vary. The inventors have found that a seal layer thickness of from 15 μιη to 50 μιη is effective, and a thickness of 20 μιη is most effective. The overall thickness of the lidding film is typically from 20 μιη to 60 μιη.
According to a third aspect of the present invention, there is provided a process for making a sealable container as described above, wherein the process comprises:
a) providing a container comprising a base and a continuous side wall upstanding from the base with a peripheral flange formed along the upper edge of the continuous side wall; and b) applying a layer of adhesive to an upper surface of the peripheral flange to produce a sealable container. The container may be corona or plasma treated between steps a) and b) to improve adhesion of the adhesive to the peripheral flange.
The layer of adhesive may be applied to the upper surface of the peripheral flange by a roller, such as a silicone roller or a heated chrome roller. Alternatively, the layer of adhesive may be applied by spray coating, by a hot melt gun or by a printing technique.
The inventors have found that supporting the container during the application of the layer of adhesive helps transfer an even thickness of the adhesive to the peripheral flange. In particular, the inventors have found that supporting the peripheral flange is helpful in producing a superior sealable container.
The process for making a sealable container according to the present invention may be operated as a continuous process. For example, the containers may be supplied continuously to a production line for continuous application of the layer of adhesive. The process for making a sealable container according to the present invention may also be operated as a batch process. Alternatively, the process for making a sealable container according to the present invention may be operated as a combination of continuous and batch process steps. For example, the containers may be supplied by a batch process step and application of the layer of adhesive may operate as a continuous process step.
According to a fourth aspect of the present invention, there is provided a process for making a sealed container as described above, wherein the process comprises:
a) providing a sealable container prepared according to the process for making a sealable container described above;
b) applying a layer of lidding film to the peripheral flange of the sealable container; and
c) applying pressure to the peripheral flange to seal the lidding film to the sealable container.
The pressure is used to fuse the lidding film to the layer of adhesive applied to the peripheral flange and thereby seal the container. Preferably heat is applied simultaneously with pressure.
The pressure applied to the peripheral flange and the time for which the pressure is applied can vary. The inventors have found that a pressure of from 30 psi to 180 psi and a period of time of from 0.5 seconds to 5 seconds is effective, and a pressure of 110 psi and a period of time of 1 second is most effective.
The heat applied to the peripheral flange can also vary. The inventors have found that a temperature of from 105 °C to 170 °C is effective, and a temperature of 150 °C is most effective. Pressure alone or pressure and heat may be applied to the peripheral flange by any process suitable for sealing the lidding film to the sealable container. Typically a sealing shoe matching the shape of the peripheral flange is used to seal the lidding film to the sealable container. As with the process for making a sealable container, the process for making a sealed container according to the present invention may be operated as a continuous process. For example the sealable containers may be supplied to a production line for provision of a layer of lidding film and application of heat to the peripheral flange. The process for making a sealed container according to the present invention may be operated as a batch process. Alternatively, the process for making a sealed container according to the present invention may be operated as a combination of continuous and batch process steps.
The process for making a sealed container may be carried out after the sealable container has been made and a product placed within the sealable container or the process for making the sealed container may be carried out separately from the process for making the sealable container.
The invention will be further described with reference to the drawings and figures, in which: figure 1 is a cross sectional view of a prior art tray;
figure 2 is a flow diagram of a typical prior art thermo- forming process;
figure 3 shows a perspective view of a tray according to the invention;
figure 4 is a cross sectional view of a tray according to the invention;
figure 5 is a flow diagram of a thermo-forming process according to the invention;
figure 6 is a schematic partial view of a flange of a prior art tray;
figures 7A to 7E are schematic partial views of trays according to the invention;
figures 8A, 8B and 8C are schematic top, side and front views of a tray according to the invention, including a modified denest feature;
figure 9A is a schematic view of a prior art tray nested into a similar tray; and
figure 9B is a schematic view of a tray according to the invention and including a modified denest feature, nested into a similar tray. Figure 1 shows a cross sectional view of a prior art container 1 ' comprising a base 2' with ribs 6', side walls 3 ' with a peripheral flange 4' . The container Γ is made of PET and has a thickness of for example 400-500 μιη. The surface of the container is coated with PE film with a thickness of for example 30 to 50 μιη. Typically, the tray comprises 1 grams of PE (i.e. 5.8%w/w) and 16.8 grams of PET (i.e. 94.2% w/w).
Figure 2 is a simplified illustration of a thermo-forming process for the manufacture of PET/PE containers in which PET in the form of flakes and pellet are introduced into the system to produce the trays. The flakes and pellets are melted into sheets which are coated with a film of PE. The sheets are then moulded into trays. About 6% PET/PE waste is obtained from the extrusion of the trays. At this stage, the extruded trays are attached to each other by a web 7 which is cut out to produce individual trays with a return flange. This separation process produces about 40% web waste. Finally about 2% tray waste is produced in the act of trimming the trays at the end of the process. Extrusion waste, web waste and tray waste are contaminated with PE and cannot be recycled to produce clear products. Based on the production of 100,000,000 trays, this represents a total of about 888 tons of waste per annum (i.e. 148 ton p. a. extrusion waste, 705 ton p. a. web waste and 35 ton p. a. tray waste).
Figure 3 shows a sealable container 1 according to the invention comprising a base 2 and a continuous side wall 3 upstanding from the base 1. A peripheral fiange 4 is formed along the upper edge of the continuous side wall 3. A layer of adhesive 5 is located on an upper surface of the peripheral fiange 4 such that a lidding film (not shown) may be sealed to the flange. A sealed space can thereby be created between the base 1 , continuous side wall 3 and lidding film. Figure 4 shows a cross sectional view of a sealable container 1 according to the invention comprising a base 2 and a continuous side wall 3 upstanding from the base 1. The container is preferably made of PET and has a thickness of for example 400-500 μιη. A peripheral flange 4 is formed along the upper edge of the continuous side wall 3 and may comprise a return flange. The container is not coated with a PE film as in figure 2, but instead an adhesive film 5 is applied onto an upper surface of the peripheral flange 4 such that a lidding film may be sealed to the flange. The thickness of the adhesive film is preferably approximately 50 μιη. Ribs 6 are located in the base 2 to strengthen the base of the tray.
Figure 5 is a simplified illustration of a thermo- forming process for the manufacture of PET containers according to the present invention in which PET in the form of flakes and pellet are introduced into the system to produce the trays. The flakes and pellets are first melted into sheets of pure PET. A process according to the present invention therefore produces waste after PET extrusion which can be recycled to produce clear product, since the waste is substantially free from adhesive or PE. Trays are then formed in the PET sheet, and then subsequently, the adhesive is applied onto the flange using an adhesive applicator 8 and the trays are trimmed and separated. The web waste is also substantially free of adhesive and can be recycled into the process. At the end the production line, tray waste is produced that comprises PET and adhesive. Thus, the claimed process produces substantially less waste contaminated by adhesive or PE and is consequently more cost-effective since it enables the production of clear products from the aggreated recycled waste. Again, using the example of the production of 100,000,000 trays, we can predict the same 888 tons of aggregated waste, but only 35 tons is affected with PE/adhesive. This can be re-admitted to the extrusion process without the existing penalties on clarity, or at worst, segregated and used for products (for example coloured products) where clarity is unimportant.
As explained above, it is difficult to attach a lidding film to PET surfaces and a solution proposed in the past was to coat the whole upper surface of the container with a layer of PE and an intermediate layer of EVA, since PE provides a surface that a lidding film readily attaches to. However, the resulting trays were heavier and less recyclable than PET trays due to the presence of the additional layers. In the container of the present invention, a layer of adhesive is located on an upper surface of the peripheral flange such that, at a later stage, when required, a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film. Thus, no changes are made to the top sealing film (which can be a conventional lidding film as used in the industry) and only the container is modified. Other solutions would require expensive and complex modifications of the lid and/or the tray. The resulting container has a better recyc lability and trays that are up to 3% lighter than prior art trays may be obtained.
A further advantage of the present invention is that the layer of adhesive located on the upper surface of the flange provides means for visually identifying the presence of a seal layer prior to seal, because the adhesive surface is visually different from the PET surface. In addition, post seal, the layer of adhesive provides means for visually checking the integrity of the seal by forming a adhesive "band" that is visible through the lidding film.
When the trays are nested into one another, they are often difficult to separate because of the blocking properties of PET (i.e. the propensity of PET surfaces to stick to other PET surfaces). Figure 6 is a schematic view of a corner of a known tray design. Due to tray design, the flange is wider at the corners than along the sides of the tray. In known trays, this additional area can be utilised to create a denesting feature to aid the separation of nested trays. This is achieved by forming a recess into the tray, this recess sits onto the upper flange of the nested tray. The recess location is alternated in a sequence so it does not match the tray it is nesting against.
In the present invention, the upper surface of the peripheral flange is coated with an adhesive. Some adhesives have a low tack at room temperature; however as the temperature increases, the tack level also increases. The result of this would be the locking together (or partial gluing together) of trays as the underside of the denesting recess of a (top) tray contacts the upper flange of its nested (bottom) tray.
To address this issue, the tray of the present invention may comprise at least one denesting recess located in a denesting area, whereby the denesting area is relieved relative to the upper surface of the flange, i.e. set lower than the flange level by a distance of preferably 1 mm. The relieved area extends partially (for example as crescents adjacent the corners of the tray) or completely (i.e. both adjacent the corners of the tray and along the sides of the tray) along the inner periphery of the flange so that when the adhesive material is applied to the tray, the upper surface of the relieved area is not coated. For example, in figures 7A, 7B and 7C, the relieved area is located at the corners of the tray in the shape of a crescent and the denesting recess is located in the relieved area. In figures 7D, 7E and 7F (and also in figures 8A, 8B and 8C) the relieved area extends along the whole inner periphery of the flange so that the tray comprises an outer peripheral flange coated with adhesive and an inner peripheral flange, devoid of adhesive.
The denesting recesses are located in the relieved area so that when the adhesive material is applied to the tray, the upper surface of the denesting recess and the area surrounding the recess is not coated. As such the possibility of locking together the trays is eliminated. The height of the step can be altered to adjust the separation gap between the trays. A typical gap is in the region of 7 mm. In these embodiments, the distance between the upper surface of the relieved area and the base of the tray is shorter than the distance between the upper surface of the flange and the base. Preferably, the distance between the upper surface of the flange and the upper surface of the relieved area is approximately 1mm. Preferably, the width of the relieved area is approximately 1 mm. As can be seen in figures 9A and 9B, the distance between the adhesive coated flange of a bottom tray and the adjacent wall of a top tray can be typically increased by approximately 1 mm (e.g. 0.84 mm for standard trays and 1.71 for trays according to the present invention). The relieved area is therefore advantageous in that it prevents a first tray of the present invention to stick to second nested tray due to the distance created between the adhesive of the upper surface of the flange of the first tray and the adjacent wall of the second tray.
Examples
LINPAC rfresh R2-45 meat trays were prepared and tested to demonstrate the suitability of the invention for the packaging of fresh meat using a MAP system.
The trays were manufactured from a 500 μιη thick monolayer of amorphous PET sheet. The formed trays were coated with an adhesive (reference BAM 2041) supplied by Beardow and Adams (Adhesives) Ltd. The adhesive was applied to the flange of the tray using a Diemme Fin model SC4 roller glue spreading machine. The adhesive was melted against a chrome roller with a temperature of 177 °C and applied to the tray flange via a silicone rubber roller with a temperature of 125 °C. The coating equipment had a line speed of 10 m/min and the trays were coated in batches of four using an aluminium carrier designed to support the flange of each tray as they passed under the coating roller. The equipment was adjusted to apply the adhesive uniformly on the flange with coating thicknesses of 50 μιη, 60 μιη, 80 μιη and 90 μιη. The remainder of the tray surfaces were free from adhesive contamination.
The trays were sealed using a 35 μιη thick commercially available lidding film. This was supplied by LINPAC Packaging Limited (reference THB 267110). The trays were filled with an atmosphere of 80% oxygen and 20% carbon dioxide gas using a World Class Packaging model T200 tray sealing machine. A variety of sealing conditions were used with seal times of from 1 to 3 seconds, seal pressures of from 30 psi to 180 psi, and sealing bar temperatures of from 130 °C to 170 °C. The trays were stored for 10 days at 4 °C to simulate the packaging supply chain. The residual oxygen was then measured using a HiTec MAP 4050 gas analyser. No significant loss of oxygen concentration was noted indicating that the packs were leak free. Leak tests were conducted at room temperature using a Lippke 4000 Package Test System. Leak test pressure was 50 mBar with a settling period of 30 seconds and a leak detection time of 30 seconds. The packs were again shown to be leak free as the observed pressure drop was <2 mBar. Burst tests were conducted using the Lippke 4000 Package Test System. The rate of pressure increase was 5 mBar/second. The failure mode was failure of the top web film showing that the adhesive bond between the tray and the top web was good.
Seal Seal Seal Average Average
Trial Adhesive
Temp Time Pressure Leak Burst Number thickness
(degC) (sec) (psi) (mBar) (mBar)
1 50 130 1 110 n/a 216
2 50 130 3 110 n/a 225
3 50 170 1 110 n/a 175
4 50 170 3 110 n/a 126
6 50 130 3 110 4.5 230
7 90 130 3 110 2.9 274
8 50 130 1 65 n/a 233
9 50 130 1 110 n/a 247
10 50 150 1 65 n/a 159
11 50 150 1 110 n/a 186
12 50 170 1 65 n/a 175
13 50 170 1 110 n/a 207
14 50 130 1 110 1.7 260
15 60 130 1 110 2.1 315
16 80 130 1 110 2.1 270

Claims

Claims:
1 A sealable container comprising a base and a continuous side wall extending substantially perpendicular to the base with a peripheral flange formed along the upper, in use, edge of the continuous side wall, wherein a layer of adhesive is located on an upper, in use, surface of the peripheral flange such that a lidding film may be sealed to the peripheral flange to create a sealed space between the base, continuous side wall and lidding film.
2. A sealable container according to claim 1, wherein the base and the continuous side wall are clear.
3. A sealable container according to claim 2, wherein the base and the continuous side wall consist essentially of polyethylene terephthalate (PET), optionally the base and the continuous side wall consist essentially of recycled PET.
4. A sealable container according to claim 1, 2 or 3, wherein the adhesive is an adhesive based on a polymeric substrate or a polyethylene(PE) or PE co-polymer based material.
5. A sealable container according to any preceding claim, wherein the thickness of the layer of adhesive is from 20 μιη to 100 μιη, preferably 50 μιη.
6. A sealable container according to any preceding claim, further comprising at least one denesting recess, free of adhesive, adjacent a corner of the container.
7. A sealable container according to any preceding claim, further comprising a denesting area, free of adhesive, which extends partially or completely along the inner periphery of the flange.
8. A sealable container according to claim 7, wherein the distance between the upper surface of the denesting area and the base of the tray is shorter than the distance between the upper surface of the flange and the base.
9. A sealable container according to claim 7 or 8, wherein the at least one recess is located in the denesting area.
10. A sealed container comprising a sealable container according to any of claims 1 to 9 and a lidding film sealed thereto.
11. A sealed container according to claim 10, wherein the atmosphere within the sealed container has been modified or controlled.
12. A sealed container according to claim 11, wherein the modified atmosphere contains increased levels of oxygen or carbon dioxide.
13. A sealed container according to any of claims 10 to 12, wherein the lidding film is a multi-layer film comprising a seal layer and the seal layer comprises polypropylene (PP) and/or PE.
14. A sealed container according to claim 13, wherein the thickness of the seal layer is from 15 μι ίο 50 μιη, preferably 20 μιη.
15. A sealed container according to any of claims 10 to 14, wherein the thickness of the lidding film is from 20 μιη to 60 μιη.
16. A process for making a sealable container according to any of claims 1 to 9, wherein the process comprises:
a) providing a container comprising a base and a continuous side wall upstanding from the base with a peripheral flange formed along the upper, in use, edge of the continuous side wall; and
b) applying a layer of adhesive to an upper, in use, surface of the peripheral flange to produce a sealable container.
17. A process according to claim 16, wherein the container is corona treated or plasma treated between steps a) and b).
18. A process according to claim 16 or 17, wherein the layer of adhesive is applied to an upper surface of the peripheral flange by a roller, by spray coating, by a hot melt gun or by a printing technique.
19. A process according to claim 18, wherein the roller is a silicone roller or a heated chrome roller.
20. A process according to any of claims 16 to 19, wherein the peripheral flange is supported during the application of the layer of adhesive.
21. A process according to any of claims 16 to 20, wherein the process is a continuous process.
22. A process for making a sealed container according to any of claims 10 to 15, wherein the process comprises:
a) providing a sealable container prepared according to any of claims 16 to 21;
b) applying a layer of lidding film to the peripheral flange of the sealable container; and
c) applying pressure to the peripheral flange to seal the lidding film to the sealable container.
23. A process according to claim 22, wherein pressure is applied to the peripheral flange at a pressure of from 30 psi to 180 psi for a period of time of from 0.5 seconds to 5 seconds, preferably 110 psi for 1 second.
24. A process according to claim 22 or 23, wherein heat is applied simultaneously with pressure.
25. A process according to claim 24, wherein heat is applied to the peripheral flange at a temperature of from 105 °C to 170 °C, preferably at a temperature of 150 °C.
26. A process according to any of claims 22 to 25, wherein a sealing shoe matching the shape of the peripheral flange is used to seal the lidding film to the sealable container.
27. A process according to any of claims 22 to 26, wherein the process is a continuous process.
28. A sealable container substantially as described herein.
29. A sealed container substantially as described herein.
30. A process for making a sealable container as described herein.
31. A process for making a sealed container as described herein.
EP11704299.4A 2010-01-08 2011-01-10 Container and processes for making a container and a sealed container Active EP2459459B8 (en)

Priority Applications (12)

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EP22153165.0A EP4056491A3 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and process for making a sealable container
EP14186025.4A EP2845819B1 (en) 2010-01-08 2011-01-10 Sealable container and processes for making a sealable container and a sealed container
DK14186025.4T DK2845819T3 (en) 2010-01-08 2011-01-10 Sealed container as well as methods for making a sealed container and a sealed container
EP16174861.1A EP3184453B1 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and processes for making thereof
PL16174861T PL3184453T3 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and processes for making thereof
PL14186025T PL2845819T3 (en) 2010-01-08 2011-01-10 Sealable container and processes for making a sealable container and a sealed container
PL11704299T PL2459459T3 (en) 2010-01-08 2011-01-10 Container and processes for making a container and a sealed container
RSP20191018 RS59226B1 (en) 2010-01-08 2011-01-10 Container and processes for making a container and a sealed container
SI201131770T SI2459459T1 (en) 2010-01-08 2011-01-10 Container and processes for making a container and a sealed container
DKBA201400135U DK201400135Y3 (en) 2010-01-08 2014-10-03 Container
CY20191100063T CY1124342T1 (en) 2010-01-08 2019-01-17 SEALED CONTAINER AND PROCESSES FOR MAKING A SEALED CONTAINER AND A SEALED CONTAINER
HRP20191497 HRP20191497T1 (en) 2010-01-08 2019-08-19 Container and processes for making a container and a sealed container

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GBGB1000310.1A GB201000310D0 (en) 2010-01-08 2010-01-08 Container
GB1011918A GB2471028A (en) 2010-01-08 2010-07-15 Tray with adhesively sealed lid film
PCT/GB2011/050031 WO2011083342A2 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and processes for making a sealable container and a sealed container

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EP16174861.1A Division EP3184453B1 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and processes for making thereof
EP16174861.1A Division-Into EP3184453B1 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and processes for making thereof
EP14186025.4A Division EP2845819B1 (en) 2010-01-08 2011-01-10 Sealable container and processes for making a sealable container and a sealed container
EP14186025.4A Division-Into EP2845819B1 (en) 2010-01-08 2011-01-10 Sealable container and processes for making a sealable container and a sealed container
EP22153165.0A Division EP4056491A3 (en) 2010-01-08 2011-01-10 Sealable container, sealed container and process for making a sealable container

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EP14186025.4A Active EP2845819B1 (en) 2010-01-08 2011-01-10 Sealable container and processes for making a sealable container and a sealed container
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AU (1) AU2011204508B2 (en)
CY (2) CY1124342T1 (en)
CZ (1) CZ28307U1 (en)
DE (1) DE202011110699U1 (en)
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ES (3) ES2707334T3 (en)
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PT3184453T (en) 2022-04-06
HRP20191497T1 (en) 2019-11-29
DK201400135Y3 (en) 2014-11-14
DE202011110699U1 (en) 2015-08-17
ES2910656T3 (en) 2022-05-13
DK201400135U1 (en) 2014-10-10
EP3184453A1 (en) 2017-06-28
PL2845819T3 (en) 2019-04-30
EP2845819A1 (en) 2015-03-11
RS59226B1 (en) 2019-10-31
SI2845819T1 (en) 2019-03-29
EP4056491A3 (en) 2022-12-28
CY1124342T1 (en) 2022-03-24
LT2459459T (en) 2019-08-26
EP4056491A2 (en) 2022-09-14
LT2845819T (en) 2019-02-11
PT2459459T (en) 2019-09-06
GB2478028A (en) 2011-08-24
HRP20190087T1 (en) 2019-03-22
HUE058255T2 (en) 2022-07-28
GB201000310D0 (en) 2010-02-24
EP3184453B1 (en) 2022-03-09
ES2739998T3 (en) 2020-02-05
WO2011083342A3 (en) 2011-11-17
DK2459459T3 (en) 2019-08-26
EP2845819B1 (en) 2018-10-24
PL3184453T3 (en) 2022-06-20
HUE046058T2 (en) 2020-02-28
CY1122050T1 (en) 2020-10-14
PL2459459T3 (en) 2019-11-29
AU2011204508B2 (en) 2015-11-26
HRP20190087T8 (en) 2019-04-19
GB201100292D0 (en) 2011-02-23
RS58221B1 (en) 2019-03-29
SI2459459T1 (en) 2019-10-30
ES2707334T3 (en) 2019-04-03
EP2459459B8 (en) 2019-06-26
WO2011083342A2 (en) 2011-07-14
EP2459459B1 (en) 2019-05-22
GB201011918D0 (en) 2010-09-01
WO2011083342A4 (en) 2012-01-05
CZ28307U1 (en) 2015-06-16
HUE042948T2 (en) 2019-07-29
AU2011204508A1 (en) 2013-07-18
DK2845819T3 (en) 2019-02-04
GB2471028A (en) 2010-12-15
GB2478028B (en) 2012-12-05
WO2011083342A8 (en) 2011-09-29

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