Foil

FIELD: layered products.

SUBSTANCE: foil comprises basic foil made of oriented polypropylene foil or foil made of polyethylene terephthalate metallized from one side. One side of the foil having the metallized covering is provided with print covering which in turn is provided with lacquer welded under high temperature conditions.

EFFECT: simplified packing of products.

12 cl, 2 dwg

 

The invention relates to artificial foil primarily for packing rectangular objects, in particular soup cubes, with basic foil from polyolefin or polyethylene terephthalate, preferably metallized on one side.

From the application DE-A-19948286 known artificial foil primarily for packaging preferably cubic products, such as soup cubes, and artificial foil consists of a polyolefin foil, preferably made of PE or PP.

On this basis, the basis of the invention is to develop a synthetic foil previously mentioned type so as to ensure easy packing of the items and their absolute tightness.

This task in artificial foil for packing rectangular objects in the form of soup cubes, with base foil of oriented polypropylene foil or foil made of polyethylene terephthalate, metallized on one side, according to the invention is solved in that on one side of the foil, provided with a metallic coating of the printed coating, which with profiling applied it at a high temperature sealing lacquer.

As the base foil used biaxial oriented polypropylene foil.

The surface of the printed coating, available from tapecity the existing varnish, covered with a layer of coating of varnish, applied with profiling.

Between the metallic coating and printing coating provides a primer or adhesive layer.

As the base foil used compact foil.

As the base foil can be used porous foil.

When pores are formed as a cell formed by pulling the foil.

Pores can be formed by foaming.

Compact base foil has a thickness of about 10 to 100 μm, preferably 20 to 50 μm, in particular 28-32 ám.

Hollow base foil has a thickness of about 10 to 100 μm, preferably 20-25 μm, in particular 35 to 40 microns.

Free printable coating, preferably the inner side of the base foil is applied, at least one additional layer.

Simple or biaxial-oriented polypropylene film, and a film of PET, has a very favorable density values, which are even more improved with one-sided metallization.

The sealing varnish, applied with profiling, provides a tight closure so wrapped around the item of packaging of synthetic foil, and thanks to the profiled application is applied only such quantity of the sealing lacquer which is necessary on the I closure.

According to a preferred execution of the invention provides that the surface of the printed coating or metal coating, free from the sealing lacquer supplied printed with profiling layer coating of varnish.

These are protected as areas of the printed image or metallization, and the area covered with the sealing lacquer, and the thickness of the foil remains constant over the entire width, so that it becomes possible uniform winding of the foil.

Another preferred version of the invention is that between the metallization and the printed coating provides a primer or adhesive layer.

It is very profitable, when, according to another preferred execution of the invention, the base foil is provided the use of a compact foil.

In addition, according to the invention as a base foil may include a porous foil.

While both types of foil has shown himself very well, and porous foil seems to be completely opaque, as the edges of the pores occurs refraction.

Voids can be formed as cells that can occur when pulling the foil.

It is possible, however, to create pores foaming.

When using compact base foil thickness according to the of the invention should be from about 10 to 100 microns, preferably 20-50 μm, in particular 28-32 ám.

If, in contrast, uses a porous base foil, it has a thickness of about 10 to 100 μm, preferably 20 to 50 μm, in particular 35 to 40 microns.

In one of the future versions of the invention provides that the free printed coating, preferably the inner side of the base foil has at least one additional layer.

In the drawing the invention is illustrated one example of the execution. It is shown:

Figure 1 - schematic section structure of a transparent foil.

Figure 2 is a schematic section of another structure of the foil for opaque foil.

Figure 1 in figure 1 labeled synthetic foil, the base foil 2 which consists of oriented polypropylene (OPP). This orientation can be carried out in one direction or biaxial. The base foil 2 has on one side a metallic surface 3. This metallic coating is applied by sputtering aluminum. Metallic coating 3 has a side opposite the base foil 2, a primer layer 4 for best adhesion, which may be a two-component polyurethane system which, in turn, caused the printed coating 5. Printing and coating is performed by applying a dye-based nitrocell the SHL way deep or flexographic printing. On it is printed the cover 5 with profiling applied it at an elevated temperature, the sealing lacquer 6, such as wax. This can be used waxes based on polyvinylidenechloride or ethylvinylacetate, or acrylate, and available from this sealing lacquer 6 parts of the surface have a layer 7 covering lacquer.

For the base foil 2 of oriented polypropylene (OPP) was a suitable thickness of 30 μm. The surface of the sealing lacquer 6 are located so that when laid, cut faux foil 1 shown around a rectangular object form tight seals.

A sample implementation of artificial foil 21 of figure 2 differs essentially by the fact that as a base foil 22 is applied opaque oriented polypropylene foil (RPF), whose thickness is 38 mm.

The opacity of the base foil is achieved by stretching (orienting), and in foil having cells that cause refraction of light.

However, pores can be formed also by foaming foil.

It is also the base foil 22 has on one side a metallic surface 3, which is on top of the primer layer 4 deposited printed floor 5. This print coverage 5 again with profiling applied slo the sealing lacquer 6, so he has only the necessary in the preparation and sealing of the package. The remaining part of the surface is covered with again an additional layer coating of varnish 7.

For a finishing varnish 7 is provided by the density of the coating is from 1 to 5 g/m2if necessary, this density may vary from 0.1 to 15 g/m2and be tailor-made for the thickness of the coating of the sealing lacquer 6.

Side of the base foil 22-free metallized coating may, as shown, to have additional coverage 8 to achieve additional barrier properties.

Instead of the polypropylene foil as the base foil can also be used foil PET.

1. Artificial foil for packing rectangular objects in the form of soup cubes, with base foil of oriented polypropylene foil or foil made of polyethylene terephthalate, metallized on one side, in which on one side of the foil, provided with a metallic coating of the printed coating, which with profiling applied it at a high temperature sealing lacquer.

2. Artificial foil according to claim 1, characterized in that as the base foil used doconversion polypropylene foil.

3. Artificial foil according to claim 1, characterized in that the surface of the PE Atego cover (5), available from the sealing lacquer (6), covered with a layer of top coat varnish (7), also inflicted with profiling.

4. Artificial foil according to one of claims 1 and 2 or 3, characterized in that between the metallic coating (3) and the printed coating (5) provides a primer or adhesive layer (4).

5. Artificial foil according to one of claims 1 to 4, characterized in that as the base foil (2) used compact foil.

6. Artificial foil according to one of claims 1 to 5, characterized in that as the base foil (22) used a porous foil.

7. Artificial foil according to claim 6, characterized in that the pores formed as a cell formed by pulling the foil.

8. Artificial foil according to claim 6, characterized in that the pores formed by foaming.

9. Artificial foil according to claim 5, characterized in that the compact base foil (2) has a thickness of approximately 10 to 100 μm, preferably 20 to 50 μm, in particular 28-32 ám.

10. Artificial foil according to claim 6, characterized in that the hollow base foil (2) has a thickness of approximately 10 to 100 μm, preferably 20-25 μm, in particular 35 to 40 microns.

11. Artificial foil in one of the preceding paragraphs, characterized in that at the free print cover (5), preferably, the inner side of the base foil (2, 22) caused, at least, Odie the additional layer (8).



 

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27 cl, 17 dwg, 6 tbl, 3 ex

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