DE2231134A1 - Pack with liquid content - Google Patents

Description

PATENT LAWYERS DR.-ING. H. FINCKE DIPL.-INQ. H. BOHR DIPL-ING. S. STAEGER

Fe r η r u fi 26 60 60

J _n ClNCHEN O ₁ Müllerstrasse 31

June 26, 1972

Folder 22925 Oasis P 24030 A

17 "

ti »

Imperial Chemical Industries Ltd. London, UK

Pack with liquid content

Priority: June 25, 1971 - Great Britain

The invention relates to the packaging of plus items and on containers for! liquids * in particular for ...? lijsf.iiskeit "n that are under over atmospheric pressure. .

2098S3 / 090B

BATH ORIGINAL

According to the invention v / ix-d else pack voi / geschlageü, the pressure wis a holding * ¹ see a ut> eratmosphäri: consists aufweisendem, liquid contents, said container having ^ ungäÖffnuiig least one Entlas in its wall, which consists of several There are holes, which are covered together by an iron patch of a gas-tight flexible .Foiienmaterials, which adheres peelably to the outside of the container wall, the size and spacing of the holes is such. That the adhesive foil material patch resists peeling by the maximum pressure in the Package occurs under normal storage conditions »

The container preferably has at least one or more openings of the type described (this applies in particular if the container is not compressible or not compressible). ^: . The two openings are arranged in such a way that one Sum discharge of the liquid and the other disnt to facilitate emptying by allowing air to freely enter the container.

The maximum possible size of the holes and the space between the holes, which result in a secure seal against the pressure under normal storage conditions, can be determined by experiments with a given spot on a fleece-blue material and with a given adhesive, including storage experiments under all temperature conditions ψ, η are to be understood, which may be encountered when using the packs *

The invention can be applied with particular advantage to the packaging of liquids under superatmospheric pressure in tubular plastic film bags, since the sealing patch withstands much higher pressures than

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BATH ORIGINAL

this is the case with a light spot which covers a single hole, the area of which is equal to the total area of the plurality of holes. In its prefabricated form, with swQi Entleeruiigsöffniffigsn abort ¹ , the pack also offers advantages in terms of production and use.

Ea if-it- already known * its emptying opening in the wall of plastic film is made of old by making a hole in the wall and placing a sealing patch over the hole in such a way that the patch for emptying the container from can be deducted from the grove. It also known is "KutiStstoffilmbehälter with holes, characterized hersustellen in the wall, that st one sehlauchförmigen art of film vCcqt one in tubular ©". FiIa sees the car and then cuts the hole against the surface of the car. These methods can also be used in the manufacture of plastic film containers to be used in accordance with the invention. However, when producing certain "pre-eyed plastic film bags" with two openings of the type described, it is not necessary to use a trolley for producing the openings.

Thus, according to the invention, a hose-shaped one continues to be used Plastic film bag and one made from such a bag Manufactured pack proposed, wherein the bag has a pair of opening parts, each of which by an adhesive sealing gasket leak is covered, wherein at least one patch is peelably attached and wherein the openings on the circumference of the bag are distributed (they are directly opposite each other in the flat empty bag) and in addition each opening consists of a plurality of small (as defined below) holes in the bag wall, which are shared by the

2 0 9853/0906 _B AD

The blank Eeurel is with a 5Hilloch provided, which can be closed after the bag has been filled.

The term "small" as used here to describe the Hole punch used means sufficiently small, being the nature of the wall of the bag and the adhesive used to attach the sealing leak must be taken into account, that the sealing stains stick to the booty wall, ♦ run the opening: against the opposite wall of the empty flat bag is pressed without eir ^ e Adhesion between the opposite walls of the empty Bag is created.

The invention also relates to a method for manufacturing position of these preferred plastic ilin bags. which, through is carried out. that sau a pair of openings, as described through both layers of a length of tubular plastic film in the lay flat fora cuts in and on the wall of the bag above each one Opening of a patch of gas-tight flexible film material attaches.

The preferred plastic film pouch of the invention gives the advantage & a £ the openings can be made by passing through both layers of a flat tubular Cuts through the film and then places sealing patches to cover the holes without the risk of the Glue thinning stains together through the holes or on the opposite wall of the bag stick, even if a meltable adhesive or a pressure- or contact-sensitive one Adhesive used to fasten the same will. The bag can then be filled without delay

209853/0906

.Inflated or prepared for filling. Which received? Rac ^ uag gives the other advantage, which also applies to all other packs of the invention, that if the contents have a considerable baratio-atmospheric pressure ₅ via z.3. When the container ar 2 ¹ Yes Packing triple or other carbonated? Liquids are used, the sealing patch over the small holes is exposed to a smaller peeling force than usual a larger hole. There is therefore less tendency for the sealing patch to be pushed away when it covers several small holes than when it covers a large hole with the same total area. The leak can thus be fastened sufficiently firmly over the small holes so that it does not come off but can easily be pulled off the opening of the container. In the case of plastic film bags, it has been found that the holes are small enough. That the sealing patches can be applied without adhesion between the walls of the bags are small enough that they meet the above requirements with regard to resistance to the peel forces.

Da3 e.i'.findung3according to methods for the production of Eunatstoff- ■? IimDeu "sln can continuously with a coil a? ilmsoülauchs operated, the? ilm gradually in Lengths of a bag unit is advanced to the cutter. The hole groups are preferably on the longitudinal axis of the lay flat tubes so that they are diametrically opposed to each other when the bags are inflated.

Any opening of the preferred plastic bag can go through be covered with a separate sealing stain · If necessary however, the two openings can also be cut through different parts

209853/0906

a single diaphragm covering 3ein, for example can be a band ceilweisa or completely around the pouch placed and attached at least over ind around the openings will. If the packing is to be partially stiffened, for example by surrounding it with a sleeve adhering to it, then, in general, two openings will be required so that the package can be emptied by pouring it out. Each opening is then preferably covered by a sealing patch that is a short distance away from the bag at one end adheres so that it can be easily removed by peeling it from the wall. For completely flexible bags only has to an opening can be covered by an easily peelable sealing patch, since there is then no air inlet to empty the container is necessary.

A preferred embodiment of a KunetBtoffila bag and a plastic film pack according to the invention will now be explained in more detail with reference to the accompanying drawing, which shows a filled pack which is suitable for packaging beer or other carbonated beverages. The bag is in a plump state due to the pressure of the contents. According to the drawing, the bag 1 is closed at each end by a gas-tight welding 2. It has a cylindrical part between two independent ends. The cylindrical part is surrounded by a Versteifungehülse 3, which adheres thereto. A group of seven holes, which form a EntleerungaÖffnucg, let provided in the wall of the bag. A similar second (not shown) opening Ast diametrically opposite the opening 4 is present. A sealing patch 5 covers the holes and adheres to the surrounding wall of the bag. One end of 6 dee seal

209853/0906 ^ d original

stain stands out so that it can be easily removed «If the stain is peeled off and if the stain above the second opening is removed in a similar manner for the purpose of air admission, then the pack can be easily emptied by pouring it out. "

In a specific example of a pack as described, there is the bag made of a 30 / * thick, biaxially oriented Film tube made of polyethylene terephthalate, which is a 7 / ^ thick Covering made of vinylidene chloride carries. The seven holes are circular and 2.78 mm in diameter. The sealing patch made from the same coated film how the bag is made is attached to the container wall by means of a mixed polyester adhesive. The bags granulated by the process described in GB-PS 1,251,672 be filled through a filling opening which can be provided in the wall of the bag.

Any plastic film can be used for the manufacture of the bags can be used as long as it is suitable for use with the content for which it is intended. For packaging beer and other carbonated liquids, whereupon the Invention can be used with particular advantage, the bags are preferably made of a biaxially oriented Film tube made of polyethylene terephthalate, which has a covering made of a vinylidene chloride adsch polymer, to make the container impermeable to carbon dioxide and oxygen. The bags can be attached to their Ekden using the in of the FR-PS 2 100 105 described method can be provided with gas-tight welds. This procedure exists by making an elongated weld between the flat, opposed layers of plastic film

209853/0906 _BA o

or in the saw of the edges xmä. HbQT creates the entire length of the open end, maintaining the end of the container! the weld-turns over so that the weld-turns -completely on the outer surface of the wall of the container, and the turned-over end into this. ' Layer attached with the aid of a strip of flexible material which sticks to the edge area of the folded face and to essentially the entire length of the edge area and to the adjacent parts of the container wall, whereby it also extends over the inner sand of the weld "

The invention may also to the packaging of under superatmospheric pressure fluids in rigid or semi-rigid containers pretext © * _t are as Video- prepared for packaging in molded plastic containers or in containers "the odor from paper laminates the like, for example, be able to withstand that the internal pressure in the package . In particular, the invention can also be applied to the packaging of liquids in metal cans. Metal cans for beer or other carbonated beverages have heretofore been provided with opening devices in one end of the can where part of the end plate can be torn out. Other metal cans must be pierced with a suitable tool. The first way of opening is expensive and the second is often inexpedient. The present invention creates emptying openings for such containers in a particularly simple manner. It has been found that a single opening in a metal can of a size that is reasonable for emptying the contents cannot be securely sealed by a peelable sealing patch. "

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BATH ORIGINAL

- Q _

whom) puts the contents under considerable pressure, but it has been found _{f /} that the multi-hole opening according to the invention can be safely closed in this way because the pressure is distributed, and this also applies if the contents consist of beer or also consists of another carbonated drink. The invention thus results in a reduction in costs and a particularly clean and convenient way of opening the pack.

The sealing patches can be made of any gas-tight, flexible material, which by means of a non-toxic adhesive can be attached to the metal or other material of the container wall. For example, it can also be used for the sealing patch is a biaxially oriented polyethylene terephthalate film, which is coated with a vinylidene chloride melt polymer is to be used. Mixed polyester adhesives are particularly suitable for attaching such sealing patches to metal cans those produced by condensation of ethylene glycol with obtained from a mixture of terephthalic and sebacic acids will.

The rigid or semi-rigid containers are preferably provided with two multi-hole openings, as with the plastic films, by separate sealing stains or by different ones Parts of a single sealing patch are covered.

209853/0906

Claims (1)

- ίο - Claims 1J pack, consisting of a container with a liquid content under superatmospheric pressure β , characterized in that the container has at least one emptying opening, which consists of other holes, which are jointly covered by a spot made of a gas-tight flexible sheet material, which adhered to the outside of the container wall in a peelable manner, the size and spacing of the holes being such that the adhesive piece of flexible foil material resists being switched off by the maximum pressure which is developed in the pack under normal storage conditions. 2. Package according to claim 1, characterized in that it has two of said openings, each of which is provided with a removable adhesive plaque. 3. Pack according to claim 1 or 2 “characterized in that the container consists of a plastic film. 4 ·. Pack according to Claim 2, characterized in that the two openings through different parts of a single one Strip-shaped Dichtungsi'lscks are covered. 5. Pack according to claim 1 or 2, characterized in that that the container consists of a metallic can. 6. Kunststoffilffi bags for use in the production of a pack according to Anaprucli 3 _S, characterized in that the bag has at least one emptying opening in its wall. 209853/0906 BATH ORIGINAL which consists of several holes ₄ which are covered together by a piece of a gas-tight "flexible film material which is removable and adheres to the outside of the bag wall. The bag also has a filling opening. ?. Kunatstoffilnbeutel according to claim 6 _5, characterized in that it comprises openings a pair of which are covered by an adhesive seal patch _s wherein at least one spot releasably adhered, and wherein the openings ijs flat empty tube each lie directly opposite and wherein finally .Each opening in the Beuteiwendung from a plurality of holes beßteht of which ^ edes iet sufficiently small that the sealing ₉ spots may be applied to the flat bag without the adhesion takes place through the holes, wherein the Beute3. is also provided with a filling opening * 8. Kunst st of film bag according to claim 7%, characterized in that the two openings are covered by separate parts of a single streifanförroigen sealing spot, Process for the production of a bag according to claim 7, characterized in that the said openings are produced by cutting through both layers of a piece of a tubular plastic film lying flat and in that on the wall of the tubular plastic Film attached a patch of a gas-tight flexible film material over each opening. 209853/0906 Blank page