WO1996001775A1 - Packaging pouch with stiffening air channels - Google Patents

Packaging pouch with stiffening air channels Download PDF

Info

Publication number
WO1996001775A1
WO1996001775A1 PCT/DK1995/000287 DK9500287W WO9601775A1 WO 1996001775 A1 WO1996001775 A1 WO 1996001775A1 DK 9500287 W DK9500287 W DK 9500287W WO 9601775 A1 WO9601775 A1 WO 9601775A1
Authority
WO
WIPO (PCT)
Prior art keywords
packaging
foil
air
packaging container
portions
Prior art date
Application number
PCT/DK1995/000287
Other languages
French (fr)
Inventor
Monica Prats
Original Assignee
Danapak Holding A/S
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 Danapak Holding A/S filed Critical Danapak Holding A/S
Priority to AU29213/95A priority Critical patent/AU2921395A/en
Publication of WO1996001775A1 publication Critical patent/WO1996001775A1/en

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
    • B65D33/00—Details of, or accessories for, sacks or bags
    • B65D33/02—Local reinforcements or stiffening inserts, e.g. wires, strings, strips or frames
    • 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
    • B65D75/00—Packages comprising articles or materials partially or wholly enclosed in strips, sheets, blanks, tubes, or webs of flexible sheet material, e.g. in folded wrappers
    • B65D75/008—Standing pouches, i.e. "Standbeutel"

Definitions

  • the invention relates to a packaging container, especially for liquids, and produced from foil which is welded together to form a cavity into which liquid can be filled, and where the container can be closed and thereafter opened for the emptying of the liquid, a method for the manufacture of and the use of the container.
  • Containers made of foil materials are not immediately usable for the packaging of liquids, the reason being "that they do not have the necessary rigidity or shape-retaining qualities.
  • the packaging can be used providing that it is given a suitable shape.
  • the shape can be tetragonal, conical or pyramidical or a derivation of such shapes.
  • the base of the container By making the base of the container sufficiently large, it will be capable of maintaining its shape even in a wholly or partly emptied state, and will hereby retain its function as a packaging container.
  • the foil pack ⁇ aging so that the foil comprises an outer layer and an inner layer, said layers being laminated in such a manner that unlaminated portions extend from the one side or end of the container to its opposite side or end, said unlaminated portions forming pockets which can be filled with air before being welded together, and such that each pocket constitutes a closed chamber, in a surprisingly simple manner there is achieved a packaging which has shape-retaining qualities of such a degree that it finds immediate application in the packaging of liquids, i.e. the container maintains its shape, even though it is partly or completely empty, thus making it possible for the liquid to be poured out of the container in the same manner as from a jug or other rigid container.
  • the container is robust, in that it is not influenced to any noteworthy degree by one or possibly more leakages or punctures in the pockets or chambers, the reason being that the rest of the chambers will remain filled with air and hereby ensure that the packaging main ⁇ tains its shape-stability.
  • a particularly good packaging can be achieved by means of barrier layers, decoration layers and the like in the outer foil. Moreover, this can be of such a stiffness that the outside of the packaging remains more or less plane, whereby the finished packaging is given a smooth surface.
  • the inner layer of foil can be made very thin, in that this layer shall function only as a separation layer between air and liquid.
  • the amount of packaging foil is hereby limited.
  • the packaging As disclosed in claim 5, by dimensioning the packaging so that it can contain right up to 10 litres, it can be used as packaging for practically all existing consumer pro ⁇ ducts.
  • fig. 1 shows the packaging after the welding together of the foil layers
  • fig. 2 shows the packaging with air-filled and closed chambers
  • fig. 3 shows a section through the packaging seen in the direction III-III in fig. 2, and
  • fig. 4 shows the packaging after filling and closing.
  • the foil suitable for the manufacture of the packaging container according to the invention is produced by commonly-known lamination of two or more layers of foil, either by welding and/or by the use of an adhesive.
  • the layers of foil must be dimensioned and configured to meet the demands which the finished packaging is required to fulfil, i.e. with regard to strength, barrier layer for light and gas, printing layer and the like.
  • the layers of foil comprise an outer foil layer 2 and an inner foil layer 3.
  • the outer layer of foil 2 can be selected from the known materials for the production of packaging for liquids, while the inner layer of foil 3 needs only to fulfil the requirements for separation between air and the liquid.
  • the foil layers 2 and 3 forming the lamination are produced in a commonly-known manner, and the lamination is effected in a machine with means for the application of adhesive or heat in the areas where the lamination is to take place.
  • lamination takes place along the lines 4 which extend in a parallel manner, and which have a distance between them which corresponds to the cross- sectional area of the longitudinal channel 6 which is form ⁇ ed between adjacent laminations 4.
  • Foil thus laminated is used for the production of the pack ⁇ aging 1, as shown in fig. 4, and which will be described in the following.
  • the two foils 2 and 3 are first welded together along the side 8, see fig. 1, and a possible bottom portion 9 is inserted as indicated in fig. 3.
  • unlaminated channels 5 extend from the bottom and upwards at the side of the packaging.
  • the next step in the production is the filling of the cavities of the individual channels 6 with air, and sub ⁇ sequent closing by welding which, as shown in fig. 2, can extend along a seam 7 at a suitable distance from the edge of the packaging, and leaving an edge portion 11.
  • the air pockets 6 are substantially oval in cross-section, so that the outside of the packaging becomes suitably profiled at the sides and is hereby suitable for holding in the hand.
  • the inside 10 of the packaging can hereafter be filled with liquid in a commonly-known manner, after which the pack ⁇ aging is closed by means of a weld seam 12 in the edge portion 11 as shown in fig. 4.
  • the packaging can now be used in a way which corresponds completely to that of a rigid form of packaging, these charac eristics being maintained by the packaging during the whole of the emptying.
  • the air chambers 6 ensure the stiffness, and at the same time they facilitate the handling of the packaging.
  • the packaging has a suitable resilience, the result being that it does not slip easily out of the hand.
  • the air pockets have an insulating effect, which is an advantage when the packaging is used for cold drinks.
  • the packaging is very much the same as known kinds of packaging in both use and appearance, but with those advantages that are provided by the air pockets.
  • the consumption of material is low, which especially with larger packagings is distinct compared with corresponding packagings of stiff material, such as those made of laminated paper or cardboard.
  • the production and the filling of the packaging according to the invention can take place on known packaging and filling machines, which naturally must be provided with means for the filling with air and the welding of the pockets 6.
  • the packaging can be produced with a capacity of up to several litres, which makes it possible for relatively large amounts of liquid to be packaged in this simple manner.
  • the packaging can easily be compressed, possibly after the air pockets have been punctured, and disposed of in a commonly-known manner, completely corresponding to or ⁇ dinary forms of foil packaging.
  • pack ⁇ aging containers in shapes other than that shown in the drawing and other than the packaging described, including shapes which are known from existing packaging, merely providing that these comprise foils with separate air pockets 6 for the stiffening of the sides of the packaging.
  • the chambers are described as being filled with air, but this must be under ⁇ stood as being merely an example of a suitable gas. Naturally, other gases can be used for the purpose.

Abstract

A flexible packaging for liquids, such as milk, can according to the invention be produced from a laminated foil layer with unlaminated portions (5) which extend in parallel from the bottom of the packaging (1) and upwards, and which form channels (6) between the foil layers (2, 3). By filling these channels (6) with air, and thereafter closing them by means of a weld seam (7) in the formation of closed chambers, the air pockets will give the packaging a shape stability and stiffness which enables the packaging to be used for liquids without it collapsing while being emptied. In other words, the packaging functions in the same way as a rigid form of packaging. The packaging according to the invention can hereby be used in a simple and inexpensive manner for the packaging of consumer goods in relatively large amounts, i.e. right up to several litres per packaging, and with the possibility of providing the liquid with the best possible protection.

Description

Packaging pouch with stiffening air channels.
Background of the invention
The invention relates to a packaging container, especially for liquids, and produced from foil which is welded together to form a cavity into which liquid can be filled, and where the container can be closed and thereafter opened for the emptying of the liquid, a method for the manufacture of and the use of the container.
Containers made of foil materials are not immediately usable for the packaging of liquids, the reason being "that they do not have the necessary rigidity or shape-retaining qualities.
With small foil packagings, i.e. for liquids in amounts of up to a few hundred millilitres, the packaging can be used providing that it is given a suitable shape. The shape can be tetragonal, conical or pyramidical or a derivation of such shapes.
By making the base of the container sufficiently large, it will be capable of maintaining its shape even in a wholly or partly emptied state, and will hereby retain its function as a packaging container.
With larger foil packaging, it is not immediately possible to configure a flexible container which has the required shape-retaining qualities, the reason being that it collapses when placed on a surface and will therefore leak when the packaging has been opened.
In order to be able to use flexible packaging of this kind, it must be placed in a frame or a holder which can maintain the packaging in a shape whereby the outlet can not be brought to lie under the level of the liquid.
It is known to establish air-filled channels in the side of an open foil container in order to stiffen it.
An example of this is known from the description of US Patent No. 4,941,754, where air-filled chambers in the side ensure that the degree of stiffness achieved enables the container to be used as a vessel.
Moreover, examples of baskets or bags having side walls, bottom and top comprising inflatable air chambers are known from US Patent Nos. 4,809,352 and 4,826,329.
It is common for all of these containers that they utilize the air chambers for purposes of stiffening. This, however, requires that the chambers can be inflated and, in order to simplify this, all of the air chambers are connected in series, which results in instability when pressure is applied to the chambers. Moreover, the container is sensitive to puncturing.
None of these constructions are suitable for the packaging of liquids, the reason being that they cannot be closed in a watertight manner, and in that they are too voluminous, material-demanding and heavy.
From European application no. 621 208 Al there is known a foil packaging which is made up of two layers of foil which are laminated so that a number of mutually-connected chambers are formed. By filling this system of chambers with gas under pressure, the degree of stiffness achieved enables the foil to be used for the manufacture of packaging for liquid. However, the disadvantage of this known foil is that it is extremely vulnerable because of the connected chambers. A leak or a puncture will give rise to a drop in the gas pressure, the result being that the packaging completely loses its rigidity. Moreover, the packaging is unstable when exposed to compressive forces, e.g. when pressed in during use, where the relevant channels are wholly or partly compressed, whereby the pack¬ aging partially loses its rigidity.
Advantages of the invention
According to the invention, by configuring the foil pack¬ aging so that the foil comprises an outer layer and an inner layer, said layers being laminated in such a manner that unlaminated portions extend from the one side or end of the container to its opposite side or end, said unlaminated portions forming pockets which can be filled with air before being welded together, and such that each pocket constitutes a closed chamber, in a surprisingly simple manner there is achieved a packaging which has shape-retaining qualities of such a degree that it finds immediate application in the packaging of liquids, i.e. the container maintains its shape, even though it is partly or completely empty, thus making it possible for the liquid to be poured out of the container in the same manner as from a jug or other rigid container.
Furthermore, the container is robust, in that it is not influenced to any noteworthy degree by one or possibly more leakages or punctures in the pockets or chambers, the reason being that the rest of the chambers will remain filled with air and hereby ensure that the packaging main¬ tains its shape-stability.
This is achieved solely by an expedient positioning of the air chambers in the side of the container, in that said air chambers do not need to be particularly air-containing, neither with regard to pressure nor volume. Consequently, the packaging does not become unnecessarily large or heavy, and since it can be produced on ordinary plants, which naturally must be arranged for the filling and the closing of the air chambers, the packaging becomes particularly competitive. To this can be added that it finds immediate application as a container particularly suitable for liquids and from which liquids can be poured, and since the consumption of materials is low, it is also ensured that it can be disposed of in a simple manner, in that the pack- aging can be compressed.
As disclosed in claim 2, by letting the air chambers extend from the bottom and upwards, a good shape-stability in the height and an easier filling with air and closing of the chambers are achieved during production.
As disclosed in claim 3, by letting the cross-sectional shape of the air chambers be elongated, a good shape- stability is achieved without the packaging becoming too voluminous and awkward to grip or to hold in the hand.
As disclosed in claim 4, by letting the layers of foil be different, a particularly good packaging can be achieved by means of barrier layers, decoration layers and the like in the outer foil. Moreover, this can be of such a stiffness that the outside of the packaging remains more or less plane, whereby the finished packaging is given a smooth surface.
In addition to being suitable for welding together, the inner layer of foil can be made very thin, in that this layer shall function only as a separation layer between air and liquid. The amount of packaging foil is hereby limited.
As disclosed in claim 5, by dimensioning the packaging so that it can contain right up to 10 litres, it can be used as packaging for practically all existing consumer pro¬ ducts.
As disclosed in claim 6, by producing the foil packaging using commonly-known techniques, it can be produced simply and cheaply with improved characteristics.
Finally, as disclosed in claim 7, it is expedient to use the packaging for the packaging of milk or similar consumer products.
The drawing
An example embodiment of the packaging according to the invention will now be described with reference to the draw¬ ing, where
fig. 1 shows the packaging after the welding together of the foil layers,
fig. 2 shows the packaging with air-filled and closed chambers,
fig. 3 shows a section through the packaging seen in the direction III-III in fig. 2, and
fig. 4 shows the packaging after filling and closing.
Description of the example embodiment
The foil suitable for the manufacture of the packaging container according to the invention is produced by commonly-known lamination of two or more layers of foil, either by welding and/or by the use of an adhesive.
The layers of foil must be dimensioned and configured to meet the demands which the finished packaging is required to fulfil, i.e. with regard to strength, barrier layer for light and gas, printing layer and the like.
The layers of foil comprise an outer foil layer 2 and an inner foil layer 3.
The outer layer of foil 2 can be selected from the known materials for the production of packaging for liquids, while the inner layer of foil 3 needs only to fulfil the requirements for separation between air and the liquid.
Moreover, since there is no need for great strength in the inner layer of foil 3, it can be made thin, which makes the finished packaging light and material-saving.
The foil layers 2 and 3 forming the lamination are produced in a commonly-known manner, and the lamination is effected in a machine with means for the application of adhesive or heat in the areas where the lamination is to take place.
As indicated in fig. 1, lamination takes place along the lines 4 which extend in a parallel manner, and which have a distance between them which corresponds to the cross- sectional area of the longitudinal channel 6 which is form¬ ed between adjacent laminations 4.
Foil thus laminated is used for the production of the pack¬ aging 1, as shown in fig. 4, and which will be described in the following.
The two foils 2 and 3 are first welded together along the side 8, see fig. 1, and a possible bottom portion 9 is inserted as indicated in fig. 3.
There is hereby formed a traditional packaging with the difference that unlaminated channels 5 extend from the bottom and upwards at the side of the packaging.
The next step in the production is the filling of the cavities of the individual channels 6 with air, and sub¬ sequent closing by welding which, as shown in fig. 2, can extend along a seam 7 at a suitable distance from the edge of the packaging, and leaving an edge portion 11.
As shown by the section in fig. 3, the air pockets 6 are substantially oval in cross-section, so that the outside of the packaging becomes suitably profiled at the sides and is hereby suitable for holding in the hand.
There is no need for any great air pressure as long as the cavities 6 are distended. This ensures the desired stability and shape-retention, which makes the packaging capable of being used as packaging from which liquids can be poured without any need for further holding means in the form of frames or the like.
The inside 10 of the packaging can hereafter be filled with liquid in a commonly-known manner, after which the pack¬ aging is closed by means of a weld seam 12 in the edge portion 11 as shown in fig. 4.
The packaging can now be used in a way which corresponds completely to that of a rigid form of packaging, these charac eristics being maintained by the packaging during the whole of the emptying.
The air chambers 6 ensure the stiffness, and at the same time they facilitate the handling of the packaging.
Moreover, the packaging has a suitable resilience, the result being that it does not slip easily out of the hand. To this can be added that the air pockets have an insulating effect, which is an advantage when the packaging is used for cold drinks.
Finally, the packaging is very much the same as known kinds of packaging in both use and appearance, but with those advantages that are provided by the air pockets.
The consumption of material is low, which especially with larger packagings is distinct compared with corresponding packagings of stiff material, such as those made of laminated paper or cardboard.
The production and the filling of the packaging according to the invention can take place on known packaging and filling machines, which naturally must be provided with means for the filling with air and the welding of the pockets 6.
But, this does not increase the price of the packaging noticeably, and it will be particularly competitive in price compared with other forms of liquid packaging with the same characteristics.
The packaging can be produced with a capacity of up to several litres, which makes it possible for relatively large amounts of liquid to be packaged in this simple manner.
After use, the packaging can easily be compressed, possibly after the air pockets have been punctured, and disposed of in a commonly-known manner, completely corresponding to or¬ dinary forms of foil packaging.
It lies within the spirit of the invention to produce pack¬ aging containers in shapes other than that shown in the drawing and other than the packaging described, including shapes which are known from existing packaging, merely providing that these comprise foils with separate air pockets 6 for the stiffening of the sides of the packaging.
Throughout the above description, the chambers are described as being filled with air, but this must be under¬ stood as being merely an example of a suitable gas. Naturally, other gases can be used for the purpose.

Claims

C L A I M S
1. Packaging container, especially for liquids, and produced from foil which is welded together to form a cavity into which liquid can be filled, and where the con¬ tainer can be closed and thereafter opened for the emptying of the liquid, c h a r a c t e r i z e d in that the foil comprises an outer layer (2) and an inner layer (3), said layers (2, 3) being laminated (4) in such a manner that unlaminated portions ( 5 ) extend from the one side or end of the container to its opposite side or end, said unlaminated portions ( 5 ) forming pockets ( 6 ) which can be filled with air before being welded together (7, 8), and such that each pocket (6) constitutes a closed chamber.
2. Packaging container according to claim 1, c h a ¬ r a c t e r i z e d in that the pockets ( 6) extend from the bottom of the container (1) and upwards.
3. Packaging container according to claims 1 and 2, c h a ¬ r a c t e r i z e d in that the unlaminated portions ( 5) are of such a breadth that the cross-section of the air- filled pocket (6) is elongated.
4. Packaging container according to claims 1-3, c h a ¬ r a c t e r i z e d in that the outer layer of foil ( 2 ) is of sufficient strength to resist puncturing and in a commonly-known manner can comprise barrier layers, and in that the inner layer of foil (3) is a relatively thin foil.
5. Packaging container according to claims 1-4, c h a ¬ r a c t e r i z e d in that it can be produced in sizes having capacities from about 200 ml to about 10,000 ml.
6. Method for the production of a packaging container according to claims 1-5, c h a r a c t e r i z e d in that the foil (2, 3) with adjacent through-going unlaminated portions ( 5 ) is welded together ( 8 ) along two opposite sides and bottom in the formation of a cavity (10), where the portions (5) extend from the bottom (9) and upwards, after which the portions ( 5 ) are filled with air and closed (7) by welding or the like, said closing (7) extending at a distance from the upper edge of the container, leaving an edge portion (11) for a closing seam (12) after filling.
7. Use of the packaging container disclosed in claims 1-5 and of the method disclosed in claim 6 for the production thereof, c h a r a c t e r i z e d in that the packaging (1) is used for milk, juices and similar consumer products.
PCT/DK1995/000287 1994-07-08 1995-07-05 Packaging pouch with stiffening air channels WO1996001775A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU29213/95A AU2921395A (en) 1994-07-08 1995-07-05 Packaging pouch with stiffening air channels

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DK0827/94 1994-07-08
DK82794A DK82794A (en) 1994-07-08 1994-07-08 packaging container

Publications (1)

Publication Number Publication Date
WO1996001775A1 true WO1996001775A1 (en) 1996-01-25

Family

ID=8098000

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DK1995/000287 WO1996001775A1 (en) 1994-07-08 1995-07-05 Packaging pouch with stiffening air channels

Country Status (3)

Country Link
AU (1) AU2921395A (en)
DK (1) DK82794A (en)
WO (1) WO1996001775A1 (en)

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GB2311753A (en) * 1996-04-01 1997-10-08 Tetra Laval Holdings & Finance A packaging material web for a self-supporting packaging container wall
WO1998001354A1 (en) * 1996-07-10 1998-01-15 Naeslund Ingemar A packaging container and a method of its manufacture
KR100551511B1 (en) * 1996-07-10 2007-06-04 잉게마르 내슬룬트 Material Packaging Container
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Cited By (101)

* Cited by examiner, † Cited by third party
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