DE2053722A1 - Process for the production of a sheet-shaped packaging material and Vorrich device for carrying out the process - Google Patents

Description

ONJB.AB - Lund / Schwöden.

A process for preparing a "arcuate V * .r ^e packing material and apparatus for carrying

de · Procedure «.

Sheet-shaped packaging materials that are currently used to form a cover for drinks, especially for milk, are known to consist of a paper or a paper and aluminum layer, which is generally connected to a polyethylene film, which weighs around 50 g per square meter has

Such a sheet-shaped packaging material has hitherto been used necessarily produced by daft on one Triger sheet made of paper or paper and aluainiua a first at a temperature τοπ about 330 ° C extruded poly-

109820/1880

8AD ORIGINAL

Ethylene layer of about 20 g per square meter and then a second one is extruded at a temperature of around 290 * C PolySthylene layer of about 30 g per square meter is applied. This method has the disadvantage that e · is long and cumbersome, a considerable waste of material and also results in a not very uniform layer material.

The need to make the polyethylene in two consecutive The work to be done can be traced back to daft when applying 50 g per square meter for a Temperature of around 33O * C in a single operation Support sheet would be damaged while applying the layer at a lower temperature, about 29O * C The disadvantage is that the polyethylene film does not adhere properly to the carrier sheet, which means that the so-called removal of the finished container favors will.

The connection by means of a primer layer was also attempted, but with no satisfactory results were obtained, be it because of the cost or because of the Unevenness of connection

To eliminate the aforementioned bare parts, attempts have already been made to dejji polyethylene film on the carrier sheet in one operation with the aid of electrical discharges or

BATH ORIGINAL -2-

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Applying ozonized air to get the polyethylene to adhere better, but they were there too results achieved unsatisfactory

The object of the invention is to provide a method by means of which »it is evident, one preferably from Polyethylene existing layer in one operation to apply a sheet of paper or aluminum. To this end, the invention proposes in the connection zone between the paper or paper and aluminum sheet and the one extruded at a temperature of about 290 ° C PoIyHthylenfiIm diffuse with the air is enriched and ozonated with a small amount of oxygen.

The air-oxygen ratio at room temperature is preferably 20: 1

For a better understanding of the characteristics of the invention In the following, the method is, for example, a preferred embodiment with reference to the drawing a device suitable for carrying out the method is described in more detail.

Fig.l shows the device schematically in side view

and
Fig. 2 is a schematic plan view of the device according to Fig.l.

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BATH ORIGINAL

The device for passing through, generally referred to as IO The method according to the invention has a foundation 11 on, on the two neighboring ones. Rollers 12 and 13 rotatable are stored. Above these rollers 12 and 13 is a Extruded head 14 is arranged, as well as a plastic layer 15, preferably but not necessarily polyethylene is pressed out at a temperature τοη e-twa 29O * C.

Rolls 12 and 13 are used together with the polyethylene layer 15 a paper or paper and aluminum layer 16 is supplied. By means of a diffuser 17 is in the connection zone of layers 15 and 16 diffuses air which is fed through a line 21 and which is made up of bottles 20 graining small amount of oxygen enriched and in ozonized in a manner known per se by means of ozonization cradles 18 is. The air-to-oxygen ratio at room temperature is approximately 20: 1.

Above the diffuser edge 17 an asbestos shield 19 is attached, which prevents the Wime emitted from the StrangpreAkopf IH from changing the temperature of the air emerging from the D0.ee 17, which temperature must in any case be below the oxidation temperature.

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BATH ORIGINAL

Claims (1)

Claims 1) Procedure for «joining a paper or paper and aluminum sheet with a plastic layer, thereby characterized, that the sheet and the layer are guided between two rollers and that in the connection zone air is diffused between the sheet and the plastic layer, which "enriches it with a small amount of oxygen" is chert and ozonated 2. Method according to claim 1, characterized in that because the plastic is IbIyIthy1 · η. 3. Process according to Claims 1 and 2, characterized in that the plastic is at a temperature approx. 290 * C is extruded 4. The method according to claim 1, characterized in that the air-oxygen ratio is 2OsI 5. The method according to claim 1, characterized in that daft the plastic layer a weight τοη about 50 g per Square meter owns " 6 · Device for carrying out the process according to the preceding claims, characterized by a diffusor flute (17) in the connecting zone of the arch with the 109820/1880 Plastic layer, through means (21) for supplying air into the Dttee (l7) by an ozonization device (l8) between the diffuser nozzle (17) and the air supply and by means (20) for introducing oxygen into the air 109820/1880 -6- Blank page