DE1809798A1 - Sterilizable packaging - Google Patents

Description

DR. ELISABETH JUNG, DR. VOLKER VOSSIUS ₁ DIPL.-ING. GERHARD COLDEWEY

• MÖNCHEN 2 S SIEGEt «TBASlEa · TILEFON 341017 TELEGNAMMADMEEE: IN VINT / M ONCHIM

File number P 18 09 798.8 ALUMIKIUH AG Sterilizable packaging

Priority: November 22, 1967 / Sohwei "Note" ldg-Hr .; 16 382/67

Se 1st known _r earn closing of thin-walled containers, the old one "outward bent Bandflanaoh sided aufansiegeln one, a cover. These containers and Daokels are also plastic foils or metal foils coated with plastic, in particular aluminum foils? shaped. The use of pressure and heat in »heat sealing means that the plastic loops remain silent and result in a tight seal. To open these containers, the lid has a tear-open tab by which it can be grasped and torn away.

Alominium dishes for jam and similar filling goods are for example o with a heating gel varnish based on polyvinyl chloride coated these lacquers adhere well to the aluminum and di Sealed seams are sufficiently tight and can be opened Döech * ns tvot; * d * m good tr ^ tsnit), by being torn away by the seal Cover, 909829/1050

BAD ORiGtNAt

For containers, the contents of which are subjected to heating after the »filling and sealing ttinar sterilization dux * oh? Use aluminum foil ^ with a diameter of about 0.1 mm, which is either coated with polyethylene or with polypropylene. "Your plastics have a softening point" that is higher than the sterilization temperature Sterilization-proof weld seam, depending on the sterilization temperature, special types of polyethylene with a corresponding softening point are required. Is for sterilization at 120 ⁰ O * B, a high-density (0.96) polyethylene necessary- Ss has gesseigdaß However, the weld is so strong that _r AUAT opening the lid mV. Picking up by hand can no longer be easily torn away. Ea needs a lot of force and the point often doesn’t run along the weld seam, or the plastic film loosens over the aluminum foil "so that the container remains closed"

The invention relates to a etsrilislerfählg "packaging therffloplatstischem plastic or coated with thermoplastic material metal foil which can be easily opened by tearing a HeiJiaiegelimht and let characterized gekennstlehn * t _e Dafi in the sealing seam layers au» Polyethylene and polypropylene are welded together "

Ba was surprisingly found that when welding various plastics tvi »po?, .yethylene and polypropylene

909829/1050

BADORLGiNAL

18097it • 3-

a tight seam is obtained, which even after a sterilization * - tion is still tight, which "I can easily tear open, Ib (A blessing on a seam that slid through welding is made of the same plastic *

The invention is particularly advantageous for can-like packs in which a container with an outwardly curved edge is blown onto a metal foil that is deeply drawn from plastic or covered with old plastic. For such containers there was until recently no flawless sterile tear-open seal. According to the invention, various plastics, polyethylene and the like can now be used simply for the production of the container and the lid, whereby the selection of which plastic is to be used for the upper part depends on properties and processing options, see deep-drawing. _r ability of the plastics can judge.

The invention can, however, also be used "in other" cases, for example with the sterilizable pouch or veioh packs, which are used under other than fortion packs for kilohs or haha and which have hitherto been sifted into swelex on the inside old polyethylene coated «aluminum traps can be manufactured. Can Bsi such a pouch pack "# * n in the swischen share from a plastic, Foly & ihylen or polypropylene" produced Si "mown" in the other strip of plastic slngsachwelOt mut be.

909829/1050

BATH ORIGINAL

The drawing shows examples of the invention.

represents.

Fig. 1 and 2 show cross sections duroh badges with sealed

tem cover ρ

Fig. 3 shows a corresponding brewing series and Fig. 4 1st «Ine view of a cut open sterilizer» capable pouch packing.

The cans according to Fig. 1-3 consist of the "container file 1, the upper band of which is bent outwards and rolled up and thereby formed the edge flange 2. It is made of an aluminum foil of Q- i mm thickness coated on the inside with high-density polyethylene The plastic layer on the inside can be glued to the aluminum foil in the form of a low-pressure polyethylene foil by means of an adhesive.

The cover 3 consists of an aluminum foil τοη 0.1 n ₍ which is covered with a polypropylene foil U Ir has a pull-up tongue 4 which is provided with old embossed ribs 4 for better grip.

To close the can, it is held in a ring-shaped Unterwerkseug and the lid is pressed on with a secret punch, with the welding at the edge flange 2 taking place. In the embodiment according to FIG. 2 , the edge 6 of the cover 5 is bent up and extends to the rolled edge 7 d * s edge flange β 2 of the Bf> ~

909829/1050

BATH ORIGINAL

n & lt * rt «ila 1. Duron theae training prevents daJ tola Heat sealing of the covering parts and edge flange that occur liquid plastic contaminates the edge of the gel stool, what to do with “spanking of the following containers” gives.

For example, you know the container part and the Iteolotl consist of the same material (smooth plastic) and only a protruding strip made of a different plastic or an old dlesea plastic at one point of the sealing seam to be on both sides tttbersogtner Aluainiuaetrelfen so dai only one adjoining the sealed seam when lined up Stttek of the lid is torn open, forming an auegui opening.

The bag pack according to FIG. 4 consists of the outside on the inside old polyethylene oversized aluminum rolls 11 and 12, which are placed on top of one another and melted together on the four edges by the sealing seam 13. On one edge 1st in the weld seam is welded into a polypropylene face 14. the Aokung can be done by pulling apart the protruding tabs 15 be opened. The strip can also be inserted just over a corner so that when the door is tidied up, it only has a look. The strip can also consist of an aluminum strip coated with old plastic on both sides and an old one The bath protrudes over the sealed seam so that a tear strip is attached receives.

909829/1050

BATH

Claims (6)

Claims 1) Sterilizable packaging made of thermoplastic material or made of thermoplastic-coated metal foil, which is torn open by a heat-sealed seam can be opened easily, characterized in that layers of polyethylene and polypropylene in the sealing seam are welded together. 2) Packaging according to claim 1, consisting of a container with an outwardly curved edge flange on the inside ^ Aluminum foil coated with polyethylene and one sealed on Lid with tear-off tongue made of aluminum foil coated on the inside with polypropylene. 3) Packaging according to claim 1 and 2, characterized in that the edge of the lid over the rolled edge of the edge flange engages. 4) Packaging according to claims 1-3 »characterized in that in the existing of parts of a plastic ψ The sealing seam of a bag is a strip of the other plastic welded into it » 5) Packaging according to claims 1-4 »consisting of a container with an outwardly curved edge flange and a sealed lid, both with polyethylene or polypropylene are coated, with a protruding strip from the at least one point in the sealing seam another plastic is welded into it. 909829/1050. 18097 6) Packaging according to claim 4 or 5 _r characterized * that the strip welded into the sealing seam is an aluminum strip coated on both sides with the cheese * 909829/1650 Empty soap