WO2017194042A2 - Method and installation for producing a multi-layered product, semi-finished product for producing multi-layered products, multi-layered product, and multi-layered film layer skeleton - Google Patents

Abstract

The invention relates to a method for producing a multi-layered product from a plurality of film layers, in which the plurality of film layers are shaped in a shaping area so as to obtain said multi-layered product, wherein the film layers are assembled and made to overlap, and the overlapping assembled film layers are deformed together but such that their surfaces can be detached from one another, to obtain the multi-layered product.

Description

 METHOD AND APPARATUS FOR MANUFACTURING A MULTILAYER PRODUCT, HALF TOOL FOR PRODUCING MULTILAYER PRODUCTS, MULTILAYER PRODUCT AND

 MULTILAYER FILM SURFACE GRILL

On the one hand, the invention relates to a method for producing a multilayer product comprising a plurality of individual layers, in which the plurality of film layers are formed in a forming region to form the multilayer product.

On the other hand, the invention relates to a method for producing a multilayer product from a single film layer, in which the single film layer is formed in a forming area to form the multilayer product. The invention further relates to a method for recycling different product materials for a preferably press-molded and / or thermoformed product, in particular for a multilayer product, in which one or more film layers are formed in a Umfombereich to the product.

The invention further relates to a system for producing a multilayer product comprising a plurality of film layers with a shaping device formulating a forming region for forming the film layers to the multilayer product and having a separating device for separating out the multilayer product from the film layers and thereby producing a film layer residual grating.

The invention furthermore relates to a system for producing a multilayer product from a single film layer with a forming device formulating a forming region for forming the single film layer into the multilayer product and a separating device for separating out the multilayer product from the film layer and thereby producing a film layer residual lattice.

The invention also relates to a semifinished product for producing multilayer products.

CONFIRMATION COPY The invention further relates to a multilayer product having one or more walls.

The invention also relates to a multi-layer film layer residual grid.

From the prior art, generic methods and related equipment for carrying out such methods are known to produce products, in particular multilayer products.

Preferably, such products are produced by thermoforming; However, they can be cold-formed with a suitable embodiment of the method or the equipment used for this purpose, with overpressure and / or vacuum techniques can be used to assist both in a hot working as well as in a cold forming.

Such products are, for example, containers, such as packaging or the like, to which a number of very different properties are often made. For this purpose, these products are multi-layered, ie as multilayer products, so that their walls, which limit the actual cavity of the product, can perform several functions.

For their production, a flat film web is formed as an endless product, in particular by means of a thermoforming process, in such a way that a three-dimensional product is produced from the flat film web.

In order for such a multi-layered product to combine a plurality of different properties, a correspondingly multi-layered film is often required for their production, such a multi-layered film generally being produced by means of extrusion or lamination processes. In other words, this means that a single film has multiple layers that are inextricably linked to produce a multilayer product with that single film.

In the example of extrusion, two or more layers of material are extruded together to form a single multilayer film web, this multilayer film web being formed, for example, on a thermoforming machine to form the respective multilayer product. Alternatively, two or more films of different materials or with different material properties can be laminated together to form a single multilayer film web, so that this individual multilayer film web has inseparably interconnected material layers.

Although these multilayer film webs provided by the known methods have been well established for the production of, in particular, thermoformed products, they are relatively complicated and the use of such multilayer film webs always produces a relatively large amount of waste or no longer for product production usable foil waste.

This not only pollutes the environment, but also makes the production of such multi-layered products more expensive.

The invention has the object of further developing generic methods or systems for producing products or multilayer products for packaging or the like in order to overcome in particular the disadvantages mentioned above. In particular, a cost-effective way should be created to be able to recycle plastics of higher quality, which are required for the production of generic products.

The object of the invention is achieved according to a first aspect of the invention of a method for producing a multilayer product of several film layers, in in which the several film layers are formed in a forming area to form the multilayer product, in which case the film layers are brought together and brought into coincidence and in which the overlapping merged film layers are deformed together, but areally detachable from each other to the multilayer product.

Due to the fact that the individual superimposed film layers are brought together in a covering manner for the deformation process in order to be formed into multilayer products, these superimposed film layers are not inseparably fused or glued to one another, ie at least largely detachable from one another individual construction of a wall of a multilayer product without special technical processes or a special machine park directly before or on a forming machine are determined and embarrassed.

Also in the choice of material compositions with respect to a layer structure of generic products, a manufacturer of such products learns a much greater independence here and he can determine the layer structure and the materials or materials required for this directly before forming and combine almost any combination.

Furthermore, it is possible to dispense with complex building machines for producing a multilayer film, such as multi-layer extrusion lines or laminating lines, as a result of which generic production methods for producing products can be significantly simplified. As a result, the production costs can be significantly reduced.

All this essentially applies to all of the process variants proposed here. In addition, it is particularly advantageous that, following the production of multilayer products, it is possible to separate the individual, substantially "loosely" superimposed film layers with simple means or simply constructing devices in retrospect.

This means that the individual layers of film can be sorted according to type or especially sorted, ie with only negligible amounts of impurities.

Recycling of a film web is also possible after forming into a multilayer product in the prior art, but only to a limited extent because it is not sorted.

In the present case, new film layers are again produced from the recycled material of the used film layers after separation or singulation, so that the once used or used materials can be returned to the production process of identical or similar products or multilayer products. Thus, the once purchased material for the manufacturer of generic products is not lost, which can also reduce the production costs also not insignificant.

The beneficial effects can be achieved in a simple manner in the sense of the invention in that the individual film layers rest only temporarily adjacent to one another, without interacting with one another in a conclusive manner; be it by melting of their surfaces (extrusion) and / or by surface or full-surface adhesion or bonding of their surfaces (lamination) or the like.

On the contrary, in the production of products or multilayer products, the individual layers of film only lie loosely on top of each other, so that no conventional composite material is used for their production.

Thus, the individual film layers do not permanently adjoin one another, at least before a forming process. They interact only temporarily with each other, in the Essentially only immediately before, during and immediately after the actual transformation process, unless this is specifically manipulated by a special process variant so that areas can remain permanently connected to one another.

For the production of generic products or multilayer products, for example, films of suitable materials as endless ware or already cut to size blanks, in particular by means of a thermoforming process such that from the substantially planar films, a three-dimensional product is formed.

The term "multilayer product" in the context of the present invention describes a product which consists of several layers, wherein these individual layers may consist of different materials or these different layers inherent different properties in order to realize a large number of desired effects on the product ,

For the purposes of the invention, the layers of the multilayer product can be produced, on the one hand, by the film layers brought into registration.

On the other hand, it is cumulatively or alternatively also possible to produce one or more layers of the multilayer product by means of a suitable coating on one or more film layers, as will be explained below.

At this point, it has already been specified that for the purposes of the invention the layers of the multilayer product can be produced differently, namely firstly from several mutually releasable film layers, secondly from several mutually releasable film layers plus one or more coatings of at least one of these film layers, and thirdly from a single film layer plus a coating or multiple coatings of that single film layer. For the purposes of the invention, the term "releasable" introduced in this context describes that the individual film layers can be lifted off from one another without destroying each other.At least this applies to the film layers immediately after the forming process, in particular with respect to produced film layer residual gratings, from which the finished molded products are separated are.

The multi-layered nature of a multilayer product relates in particular to its walls, which, viewed in cross section, are presently formed by a plurality of contiguous layers.

In the present case, such products are preferably produced by thermoforming.

However, it is also conceivable that they are only cold-formed if the method or systems used therefor are designed only suitably.

It is understood that overpressure and / or vacuum techniques can be used to assist both hot working and cold forming in order to give the manufactured products an even more concise geometry.

A preferred method embodiment for all claimed variants of the method provides that the multilayer product is molded in a thermoforming process and / or in an overprinting process. As a result, contours and geometries on multilayer products can be made even more concise and precise.

Furthermore, the term "film layer" in the context of the invention describes a substantially "endless" wound into a coil film web, or even already cut to size film web blanks, if it seems practicable.

This film layer is monolayer within the meaning of the invention. In other words, this means that the individual film layer, in particular with regard to its cross-section, is preferably characterized by a homogeneous material distribution. For the production of the desired products according to the invention, at least two, preferably three, but also more, film layers are stacked "loosely".

Thus, a film package of individual superimposed film layers is produced for the forming.

It is understood that the so "loose" superimposed film layers during the process by appropriate measures against "slipping" can be secured.

If necessary, this already enough between the individual layers of film attraction forces. It is also conceivable to apply partially weakly acting adhesives to at least one of the film layers in order to avoid critical "slippage" of the film layers.

Cumulatively or alternatively, a mechanical clamping can be provided from the outside. It is to be thought of individual grippers and / or clamping frames.

For example, the film layers are held together in their edge regions. It should also be remembered that the individual layers of film can be partially secured by an adhesive against accidental slipping.

For the purposes of the invention, the individual film layers are stacked with an overlap which is more than 20, preferably more than 50%, and more preferably more than 95%. This ensures a good yield of the film material provided for the production of as many multilayer products per area as possible.

In any case, the plurality of film layers are combined as a "film layer package" or "foil layer stack" with layers of layers that are detachably superimposed again, fed to a forming device and converted into a multilayer product, generally several multilayer products. The production of such a foil layer stack or of such a foil layer stack from a multiplicity of detachably superposed foil layers preferably takes place in a system for producing a multilayer product immediately before the actual forming device. The film layers may in this case consist of a wide variety of materials, for example of a plastic or a plastic compound, or the like.

For the purposes of the invention, the term "forming region" describes that region on the film layers or the film layer package or the film stack in which these film layers are formed into a multilayer product.

Conceptually, a forming area is also described herein as a product area.

According to a second aspect of the invention, the object of the invention is also achieved by a method for producing a multilayer product comprising a plurality of film layers, in which the plurality of film layers are formed into a multilayer product in a forming region, in which case the film layers are brought together and overlapped be brought, in which the overlapping merged film layers are deformed together, but two-dimensionally detachable to the multilayer product, and in which the merged film layers are separated into one or more multilayer products and a film layer rest grid, wherein both the multilayer product and the film layer rest grid to a later be separated back into the original film layers and provided for recycling.

Advantageously, in this method, at a later point in time, both the individual film layers of the multilayer product and the film layer residual lattice can be separated from one another. In the case of the multilayer product, for example, this is the time after the multilayer product was in use.

In the case of the film layer residual lattice, this is preferably immediately after the production of the multilayer product. In this respect, a sorted recycling of the materials originally used is possible.

A concrete realization of the method described above according to the second aspect can be achieved by means of a suitably equipped thermoforming process, but also with a suitably equipped plant for the combined thermoforming of several films into a product, which is characterized, inter alia, by: a. Separate feeding of individual films of different materials and thus also properties (such as barrier function, etc.) for a package or the like, b. Forming films together in a thermoforming process, c. after forming, the films are combined into a multi-layer product, but can be separated under force and recycled separately, d. the layers of the residual grid also remain separable and can be wound up and recycled directly separately.

In the present case, the terms "multilayer product" and "multi-layer product" are used interchangeably.

A good connection of the individual film layers after a forming process can be done in particular in a product area on the superimposed film layers by mechanical gearing or the like. For example, geometries are one Multilayerproduktes chosen such that the layers produced from the individual layers of film on the multilayer product well interlocked with each other and thus sufficiently stable for a "product life" are interconnected.

A related mechanical interlocking between individual foil layers directly adjoining one another can be achieved for example by certain surface properties of these foil layers. Advantageously, this can be dispensed with additional adhesion promoter or the like.

The object is achieved according to a third aspect of the invention by a method for producing a multilayer product of several film layers, in which the plurality of film layers are formed in a forming area to the multilayer product, in which for this purpose the film layers are brought together and brought into coincidence in which the overlapping merged film layers are deformed together but at least partially detachable from each other to the multilayer product, and in which the merged film layers are separated into one or more multilayer products and in a film layer rest grid, wherein the film layer rest grid at a later date again in the Separated film layers and can be provided for recycling.

In this method, the individual film layers are advantageously only partially connected to one another inseparably, namely in forming areas in which the plurality of film layers are formed into multilayer products. In areas that are different from these forming regions, the several foil layers are advantageously detachably connected to one another, so that they can later easily be separated again.

A concrete realization of the method according to the third aspect described above can be achieved by means of a suitably established thermoforming method, but also be achieved with a suitably equipped plant for the combined thermoforming of several films to a product, which is characterized inter alia by: a. Separate feeding of individual films of different materials and thus also properties (such as barrier function, etc.) for a package or the like, b. Forming films together in a thermoforming process, c. by the thermoforming process, the films are connected to a multi-layer product and can not be separated, d. the layers of the residual grid remain separable and can be directly wound up and recycled separately.

Again, the cohesion of the individual layers of the multilayer product can be done by mechanical gearing, as already explained above. However, these layers remain permanently connected to each other in the product area or on the multilayer product and it is not intended to separate these from each other after use of the respective multilayer product. At the film layer residual grid, however, the individual film layers remain easily separable from each other again and thus also recyclable.

The object is also achieved according to a fourth aspect of the invention by a method for producing a multilayer product from a plurality of film layers, in which the plurality of film layers are formed in a forming area to the multilayer product, wherein for this purpose in the forming area an adhesion promoter to at least one of Foil layers is attached, in which subsequently the film layers are brought together and brought into coincidence, in which the overlapping merged layers of film together, but at least partially detachable from each other are deformed to the multilayer product, and wherein the merged layers of film in one or more multilayer products and in one Film layer residual grid are separated, wherein the film layer residual grating separated at a later date again in the film layers and can be provided for recycling.

By using an adhesion promoter, the individual film layers can be bonded to one another in a particularly intimate manner, so that a product produced with this method variant has very robust mechanical properties.

It is understood that a variety of adhesion promoters can be used. It is particularly advantageous if the adhesion promoter comprises a thermally activatable adhesive. This can unfold its adhesive effect, for example, even by the mere introduction of heat during a forming process. A concrete realization of the method described above according to the fourth aspect can be achieved by means of a suitably equipped thermoforming process, but also with a suitably equipped plant for the combined thermoforming of several films into a product, which is characterized, inter alia, by: a. Separate feeding of individual films of different materials and thus also properties (such as barrier function, etc.) for a package or the like, b. Applying a primer in the product area, leaving residual grid areas uncoated, c. Forming films together in a thermoforming process, d. after forming, the films are combined into a multi-layer product and can not be separated, e. the layers of the residual grid remain separable and can be directly wound up and recycled separately. The individual film layers thus remain permanently in the product area as layers of the multilayer product. However, the film layers of the film layer residue grid can easily be separated from each other again and recycled.

According to a fifth aspect of the invention, the object is also achieved by a method for producing a multilayer product from a plurality of film layers, in which case the plurality of film layers are reshaped in a forming area to form the multilayer product, in which case a separating means for separating outside of the forming area of film layers is attached to at least one of the film layers, in which subsequently the film layers are brought together and brought into coincidence, in which the overlapping merged film layers are deformed together but at least partially detachable from each other to the multilayer product, and wherein the merged film layers are separated into one or more multilayer products and in a film layer rest grid, wherein the film layer residual grating at a later time again separated into the film layers and can be provided for recycling.

Cumulatively, but above all as an alternative to the application of a primer in a forming or product area, a release agent can be provided for separating directly adjacent film layers around the forming or product area, so that the risk of undesired "collapsing "avoided by film layers or at least greatly reduced.

A concrete realization of the above-described method according to the fifth aspect can be achieved by means of a suitably equipped thermoforming process, but also with a suitably equipped plant for the combined thermoforming of several films into a product, which is characterized, inter alia, by: a. Separate feeding of individual foils of different materials and thus also properties (such as barrier function, etc.) for a packaging or the like, b. Applying a release agent in the residual lattice region, product areas of which remain uncoated, c. Forming films together in a thermoforming process, d. after forming, the films are combined into a multi-layer product and can not be separated, e. the layers of the residual grid remain separable and can be directly wound up and recycled separately.

By applying a release agent, the reliability and thus the quality of the separation of the individual film layers after a forming process can be further improved.

The object is also achieved according to a sixth aspect of the invention by a method for producing a multilayer product of several film layers, in which the plurality of film layers are formed in a forming area to the multilayer product, wherein for this purpose only in the forming a functional layer on at least one of the film layers is attached, in which subsequently the film layers are brought together and brought into coincidence, in which the overlapping merged film layers are deformed together, but at least partially detachable or non-detachable to the multilayer product, and in which the merged film layers in a or a plurality of multilayer products and are separated into a film layer residual grid, the multilayer product and / or the film layer remaining grid being separated again into the film layers at a later time and made available for recycling can.

In this way, the multilayer product can additionally be specifically provided with virtually any desired functional layer, as a result of which the functionality of such a multilayer product can be extended particularly simply in terms of process engineering and design. Again, a concrete realization of the method described above according to the sixth aspect by means of a suitably equipped thermoforming process, but also with a suitably equipped plant for the combined thermoforming of several films to a product can be achieved, which is characterized inter alia by: a , Partially apply a barrier layer to a film, leaving residual areas thereof uncoated, b. Forming films together in a thermoforming process, c. Residual grid has no barrier layer and films are separable, d. Product has a barrier layer and is separable or inseparable.

The object is achieved according to a seventh aspect of the invention alternatively by a method for producing a multilayer product from a film layer, in which the film layer is formed in a forming area to the multilayer product, in which purpose a functional layer attached to the film layers only in the forming area in which subsequently the film layer is deformed into the multilayer product, and in which the film layer is separated into one or more multilayer products and into a film layer rest grid, wherein the film layer rest grid can be provided at least partially for recycling at a later time.

Although it is possible to dispense with several layers of film in this process variant, nevertheless, a very good recycling even of a single film layer can be achieved, since this film layer is only partially coated. A concrete realization of the method according to the seventh aspect described above can be achieved by means of a suitably designed thermoforming method, but also be well implemented with a suitably equipped plant for the combined thermoforming of several films to form a product, which is characterized among other things by: a. Partially apply a barrier layer to a film, leaving residual areas thereof uncoated, b. Forming film in a thermoforming process, c. Residual grid has no barrier layer and is therefore recyclable, d. Product has a barrier layer.

This also makes it possible to almost completely reuse the film layer, at least in the area of the film layer grid.

According to a further variant of the method decorative products can be easily produced when a decorative printed film layer is supplied.

Thus, for example, it is very easy to add a decoration for a product during the merging of film layers, preferably in the form of a film layer comprising a decoration.

As a result, a film layer package can be easily created with a decoration.

Advantageously, this decoration can be embedded by a juxtaposition of individual foil layers in a wall of a product.

Cumulatively or alternatively, a decorative layer can also be applied or printed as a functional layer in such a way that it is embedded between two film layers when the foil layers are brought together.

Furthermore, it is expedient if a barrier layer, an electronic layer or the like is attached or printed as a functional layer. As already described above, for many products or multilayer products it is advantageous or often simply necessary to have a barrier layer.

In the present case, such a barrier layer can be realized by a film layer and / or by printing a corresponding barrier material on a film layer.

But also other functional layers can be realized with the methods and solutions proposed here on a multilayer product.

By way of example only, an electronic layer for realizing electronic components on a product should be considered here.

For example, luminous effects on a product can be realized by means of a correspondingly pronounced electronic layer, which can be activated by induction, for example.

In any case, additional functional layers can be easily converted to a film layer or several film layers of a product by using locally limited printing with corresponding printing materials.

Since the recycling of materials or film layers used in the production of press and / or thermoformed products in the present case plays a significant role, the possibility of separating film layers is particularly interesting.

It goes without saying that there are a large number of possibilities for this, both in terms of process technology and plant technology.

After a very significant process execution in this regard, it is advantageous if the film layers are wound separately after separation on a separating on separate take-up reels or reels to provide each film layer separately for recycling can. Winding or winding of the film layers is a structurally simple way of separating the different film layers or the film layer residual grids from one another after the forming process.

Alternatively, it is also useful if the film layers are shredded after separation at a separating device and collected separately in order to be able to provide each film layer separately for recycling. For example, a chopping device or the like is present for this purpose. The chopping device can in this case for each of the separated film layer have their own shredder, to which the separated film is singled to be shredded by the respective shredder.

The shredded film layers can then be collected in a collection container and provided for further processing of any kind. However, the above methods are not exhaustive. Rather, further embodiments are conceivable.

In particular in this connection, the object of the invention according to a further special aspect of the invention is also achieved by a process for recycling different product materials for a preferably press- and / or thermoformed product, in particular for a multilayer product, in which one or more Foil layers are converted into a Umfombereich to the product, in which for this purpose the film layers are brought together and brought into coverage, and / or at least one film layer is acted upon with a functional layer, wherein the merged film layers in the forming area together, but areally detachable from each other Be deformed product in which the merged film layers are separated into one or more products and in a film layer rest grid, and in which the common, but areally detachable film layers of the film layer remainder grid and / or the product again from egg Nander be separated for re-sorting at a later date.

By this process variant, a material-specific separation of the materials originally used is easily possible after a forming process.

So it is particularly effective when used film layers are at least partially used for the production of new film layers after forming into one or more products.

For this reason alone, it is advantageous for the separated film layers to be melted, whereby new film layers for producing products are again produced from their molten materials. All proposed methods have in common that individual film layers for producing a multilayer product at least partially reshaped to the multilayer product and can be separated later sorted, since the individual films either adjoin one another and / or are only partially provided with a functional coating. The object of the invention is also achieved by a system for producing a multi-layer product comprising a plurality of film layers with a shaping forming a forming device for forming the film layers to the multilayer product and with a separator for separating the multilayer product from the film layers and thereby producing a film layer residual grating, wherein the plant a feeding device with at least two Vorhalteeinrichtungen for holding at least two film layers of different product materials comprises, so that the at least two film layers are jointly, but releasably deformable on the forming device to the multilayer product. In particular, by the merger individual film layers can preferably be superimposed immediately before the forming device, ie upstream of a machine direction before forming, in such area covering, whereby the layer structure of the multilayer product can be particularly easily determined and produced.

On the one hand, individual layers of film can partially be formed into final products together and, on the other hand, following the forming, ie downstream of the machine direction, they can be removed from each other again and thereby separated.

The individual film layers can be brought together with little effort in the sense of the invention, if the system or the supply device has corresponding Vorhalteeinrichtungen which are adapted to hold ready individual film layers in the context of the invention for the merger and merge immediately on the inlet side.

This can be done, for example, when axes of rotation of individual Vorhalteeinrichtungen, such as roller elements for winding foil layers, are arranged in the same horizontal plane. Often it is already sufficient if related axes of rotation of immediately adjacent roller elements are arranged horizontally within the diameter of the immediately adjacent roller element or of immediately adjacent film rollers.

In order to bring together the individual film layers in the sense of the invention, it is advantageous if the axes of rotation of two immediately adjacent Vorhalteeinrichtungen or roller elements or film rolls are less than 10 cm or less than 5 cm vertically spaced from each other. Preferably, the distance is only less than 2 cm.

Depending on the configuration or arrangement of the Vorhalteeinrichtungen it may be necessary that the merging of the individual film layers must be constructive support. In this respect, an advantageous embodiment variant provides that the feed device comprises an assembly device for covering the at least two film layers in a surface-overlapping manner.

It is understood that both Vorhalteeinrichtungen and merging devices of the feeder can be designed very different. Structurally particularly simple, a Vorhalteeinrichtung be realized by a Abwickelgestell with individual roles, the Vorhalteeinrichtung is hereby set up for unwinding of film layer rolls.

An assembly device can be realized by corresponding guide means for bringing together the individually tapered film layers, such guide means being able to comprise approximately correspondingly arranged roller elements and / or guide plate elements or the like.

Furthermore, the merging device may comprise positioning means by means of which the position of the individual film layers can be organized in a particularly precise manner.

As a guiding and / or positioning means also gripper elements or the like can be used, and this is especially advantageous in foil layer blanks.

The guide means and / or positioning means may be passive or designed as actively controlled elements.

In any case, it is important that the feeding device is set up to provide the individual film layers precisely aligned with one another on the forming device. Furthermore, it is advantageous if the feeding device comprises a coating device for coating, in particular for partial coating, a film layer which is arranged between the at least two feeding devices and the forming device and / or a heating device of the system. By such Coating device, a multilayer product can be inexpensively equipped with an additional functional layer, without the need for another film layer. As a result, the multilayer product can be produced even more varied.

The forming device and the separating device can be realized individually in the system, or as a combination device. The object of the invention is also of a plant for producing a multilayer product of a single film layer with formulating a reforming Umformvorrichtung for forming the single film layer to the multilayer product, in particular with a feeding device for feeding the single film layer, in particular with a Vorhalteeinrichtung for The system comprises at least one coating device for coating, in particular for partial coating, the single film layer, the at least one coating device being between a first film layer and a separating device for separating the multilayer product from the single film layer and thereby producing a film layer residual grating Provision device for holding the single film layer and the forming device and / or a heating device of the system is arranged.

With such a set-up system, it is possible to produce a multilayer product with only a single film layer, the layer structure of which can be produced individually by applying a coating directly to the system. A coating can be printed or otherwise applied here. And yet the only film layer after forming can be at least partially separated and recycled in the sense of the invention. This is possible with this system, since a coating is applied locally on the single film layer only in the forming area.

In order to separate individual, used film layers from one another, it is advantageous if the system comprises a separating device for separating the previously combined at least two, but detachable film layers.

Suitable separating devices can be designed differently. In order to avoid repetition, reference is made to the statements made in connection with the methods in which reference has already been made to different separating devices.

Advantageously, the number of separating means for separating previously merged but detachable film layers corresponds to the number of holding devices for holding film layers, thereby ensuring that each film layer used can be collected separately for recycling.

Furthermore, it is advantageous if the system comprises a heating device by means of which one or more foil layers are preheatable for forming.

Thermoforming plants are particularly suitable for reshaping the film layers. A thermoforming plant is a plant by means of which incoming film layers are plastically deformed while supplying heat energy.

For example, thermoforming equipment from KIEFEL TECHNOLOGIES, in particular from the KMD or KTR series, is suitable for carrying out the proposed processes, if these are proposed to be equipped accordingly. Even existing plants or thermoforming can be easily retrofitted to implement with them the proposed method into reality. The object of the invention is additionally achieved by a semifinished product for producing multilayer products with at least two superimposed separate film layers, wherein the separate film layers are arranged to form multilayer products releasably superimposed to a film layer stack or foil layer stack.

In this case, the semifinished product according to the invention consists of mutually detachable film layers, in contrast to previously customary semi-finished products, which have inextricably interconnected layers, both before forming and after forming into multilayer products.

For the purposes of the invention, the term "releasable" as used herein describes that the individual film layers can be lifted off one another in a non-destructive manner. In contrast to the state of the art, this is not possible because the layers are inseparably bonded to each other, so that the film layer here would be completely destroyed.

This semifinished product is preferably produced directly at the plant for producing multilayer products by stacking the individual film layers directly in front of the heating device or the shaping device.

In a preferred embodiment, the process of production takes place downstream of a supply device or downstream of supply devices or coating devices thereof.

The object of the invention is also achieved by a multilayer product having one or more walls, in which at least one wall has at least two surface overlapping functional layers, which are produced by at least two adjacent foil layers, wherein the at least two adjacent foil layers are arranged detachably adjacent to each other. Thus, the raw materials produced for the production of the multilayer product can be recovered much better and recycled for the production of identical or identical products. In particular, the individual film layers of the multilayer product can be recycled separately from one another.

The object of the invention is likewise based on a multi-layer foil layer grid of at least two sheet-covering film layers with recesses after the removal of multilayer products, wherein the at least two surface covering functional layers are detachably arranged adjacent to each other. As a result, a simple separation of the individual film layers of the film layer residue grid succeeds each other after the forming, whereby the individual film layers can be recycled separately from each other.

It should be explicitly pointed out at this point that the features of the solutions described above or in the claims can optionally also be expressly combined in order to be able to implement the advantages and effects that can be achieved in the present case in a cumulative manner.

Components which in the individual figures at least substantially coincide with respect to their function may in this case be identified by the same reference symbols, the components not having to be numbered and explained in all the figures.

In the drawing show:

FIG. 1 schematically shows a model view of a first installation for producing multilayer products, by means of which the different film layers used for the production of the multilayer products can be detached from one another, so that both the used film layers of the multilayer products and of a film layer residual lattice from which the multilayer products are extruded were separated, or only the used film layers of Folienlagenrestgit- ters can be separated from each other sorted and thus also sorted recyclable; FIG. 2 schematically shows a model view of a second system for producing

 Multilayer products, by means of which the different film layers used for the production of the multilayer products can be detached from one another, so that both the used film layers of the multilayer products and of a film layer residual grating from which the multilayer products have been removed or only the used film layers of the film layer residual grate are sorted from each other can be separated and thus also sorted recyclable, wherein additionally at least one of the film layers can be provided with a coating, such as partially applied adhesive and / or release agent; FIG. 3 schematically shows a model view of a third system for producing

 Multilayer products, by means of which the different film layers used for the production of the multilayer products are detachable from each other so that both the used film layers of the multilayer products and a film layer residual grating from which the multilayer products were separated or only the used film layers of the film layer residual grating are separated from each other sorted can, wherein additionally at least one of the film layers in forming areas, in which the film layers are formed into multilayer products, with a further functional layer, such as provided in the forming areas barrier layer can be provided;

FIG. 4 schematically shows a model view of another plant for the production of

Multilayer products, by means of which the different film layers used for the production of the multilayer products are detachable from one another, so that both the used film layers of the multilayer products and also a Folienlagenrestgitters, from which the multilayer products were separated out, or only the used film layers of the film layer residue grid sorted pure can be separated from each other and thus are sorted recyclable, at least one of the film layers is provided with a decorative layer; Figure 5 schematically shows a perspective bottom view of a three-layer packaging with a wall of three layers, which consist of three mutually, but mutually releasable film layers;

FIG. 6 schematically shows a detailed view of the edge region of the three-layered packaging shown in FIG. 5; and Figure 7 shows schematically a partial perspective view of a three-layer container with a wall of three layers, which consist of three mutually, but mutually releasable film layers, of which one of the film layer carries an additional decorative layer, which is embedded embedded protected between two layers of film. The exemplary embodiments shown in FIGS. 1 to 4 are all based on a system 1 for producing multilayer products 2, with the exemplary embodiments shown here, with the exception of a few differences, having substantially comparable construction.

The multilayer products 2 in this case have at least three layers 2A, 2B and 2C. The plant 1 has an inlet side 3 and an outlet side 4 and thus also a machine direction 5.

The term "machine direction" in the sense of the invention designates a transport direction along a processing path 6 through the system 1.

As a basis for producing the multilayer products 2, the system 1 comprises at least at the embodiments shown here a thermoforming system 10th

The thermoforming system 10 shown here by way of example comprises a forming device 11, a separating device 12, a heating device 13 and a stacking device 14.

The forming device 11 of the system 1 comprises a lower tool 15 and a transverse to the machine direction 5 displaceable upper tool 16th

The upper and lower tools 15 and 16 formulate the forming area 17 (shown and numbered only by way of example) of the plant 1, whereby a large number of such forming areas 17 are usually provided in order to immediately produce a maximum number of multilayer products 2 with a single forming process can. The forming device 11 downstream of the separation device 12 of Appendix 1 comprises in this Appendix 1 a punch 20 with a lower part 21 and a transversely to the machine direction 5 movable upper punched part 22. By means of the punch 20, the molded multilayer products 2 are punched out.

The heating device 13 of the system 1 placed upstream of the forming device 11 has both upper heating elements 23 and lower heating elements 24, which lie opposite each other, for the most homogeneous heating possible.

The downstream of the separator 12 still arranged stacking device 14 stacks the finished molded multilayer products 2 for their further transport.

In addition to the so-constructed thermoforming unit 20, the system 1 is characterized by feeders 25 (Figure 1), 26 (Figure 2), 27 (Figure 3) and 28 (Figure 4) and by corresponding separating means 30 (Figure 1), 31 (FIG 2), 32 (Figure 3) and 33 (Figure 4). According to the first exemplary embodiment of FIG. 1, the feeding device 25 of the system 1 comprises feeding devices 35 (numbered only by way of example) with a roller frame 36 for holding a first film roll 37, a second film roll 38 and a third film roll 39.

From each of the film rolls 37, 38 and 39, a single film layer 40, 41 and 42, respectively, can be unrolled or withdrawn in the machine direction 5, wherein the individual film layers 40, 41 and 42 are each as a film web (not separately numbered) along the processing path. 6 are moved.

For example, the transport of the individual film layers 40, 41 and 42 by means not shown here transport gripper or the like can be done.

When unrolling the Vorhalteeinrichtungen 35, the individual film layers 40,

41 and 42 brought together and immediately brought into coincidence with each other, the individual film layers 40, 41 and 42 are detachable to each other.

Thus, the individual film layers 40, 41 and 42 together form a semifinished product 43 for producing the multilayer products 2 and the individual film layers 40, 41 and 42 are thus also formed together to form the multilayer products 2.

In this first exemplary embodiment, the film rolls 37, 38 and 39 are arranged one behind the other in the machine direction 5 in such a way that the individual film layers 40, 41 or

42 are almost inevitably merged as soon as they are transported in the machine direction 5.

For this purpose, the film rolls 37, 38 and 39 transversely to the machine direction 5 on a hardly distinguishable difference in height. Thus, they are not arranged vertically one above the other. In other words, the film rolls 37, 38 and 39 arranged one behind the other in the machine direction 5 have only a difference in height of less than 2 cm.

In this respect, the Vorhalteeinrichtungen 35 and their film rolls 37, 38 and 39 are at almost the same height with the transport path. 6

In any case, the individual film layers 40, 41 and 42, respectively, are transported through the thermoforming system 20 as a releasable film layer package strand 44 and are shaped together by means of the shaping device 11.

Subsequently, the multilayer products 2 produced are separated out of the individual film layers 40, 41 and 42 or the film layer packet strand 44 by means of the separating device 12 and stacked by means of the stacking device 14.

This results in a film layer remaining grid 45 (only exemplified), which consists of the individual film layers 40, 41 and 42.

Since the individual film layers 40, 41 and 42 are detachably connected to one another, they can be singled out on the outfeed side of the system 1 by means of the separating device 29 and wound up separately on corresponding take-up rollers 46, 47 and 48.

Thus, each of the individual film layers 40, 41 and 42 is ready for a single-type recycling.

Here, the first film roll 37 and the first take-up roll 46 are operatively connected to each other by means of the first film layer 40. In other words, the first film layer 40 extends from the first film roll 37 to the first take-up roll 46.

The same applies to the second film roll 38 and the second winding roll 47 with respect to the second film layer 41, and the third film roll 39 and the third take-up reel 48 with respect to the third film layer 42nd With the first exemplary embodiment of the system 1 shown in FIG. 1, it is possible in particular to realize two concrete applications with regard to thermo-forming:

A first case provides for a separate feeding of individual foils 40, 41 and 42 made of different materials, by means of which also different properties, such as a barrier function, an electronic component function, a decoration function o- the like, in particular for a package 2 or the like can be implemented, and co-forming the foils 40, 41 and 42 in a thermoforming process wherein, after forming, the foils 40, 41 and 42 are bonded to a multi-layer product 2 but are forcibly separated and recycled separately, and wherein the foils 40, 41 and 42 of a resulting film residue grid 45 can also be separated by, for example, wound directly separated and can be recycled. A separation of the films 40, 41 and 42 of the multi-layer product 2 takes place only after its use.

A second different case also provides separate feeding of individual foils 40, 41 and 42 of different materials, by means of which also different properties, such as a barrier function, an electronic component function, a decoration function or the like, in particular for a packaging 2 or the like can be implemented, and co-forming the foils 40, 41 and 42 in a thermoforming process, wherein after forming the foils 40, 41 and 42 are no longer separably connected to a multi-layer product 2, and wherein the foils 40, 41 and 42 of a resulting However, they can be separated by, for example, directly wound up separately and then recycled.

The second exemplary embodiment of the system 1 shown in FIG. 2 differs essentially only with regard to the second supply device 26. In this respect, in the second embodiment, only the differences in terms of the first embodiment (Figure 1) are explained in order to avoid repetition. With regard to the same or equivalent features is also described on the explanations of the other embodiments. The following differences are worth mentioning.

With regard to the second feeding device 26, first, the film rolls 37, 38 and 39 are arranged one above another in a changed roll stand 50 in the vertical direction 51.

Secondly, for the purpose of bringing the individual film layers 40, 41 and 42 together, an additional joining device 52 is provided on the inlet side for covering the individual film layers 40, 41 and 42 in a planar overlapping manner.

The here schematically shown merge device 52 is structurally simple realized by roller elements not shown, which are placed above and below the processing section 6. Third, the second feeding device 26 also comprises a coating device 55 for partially coating the second film layer 41.

The coating device 55 comprises an upper coating apparatus 56 and a lower coating apparatus 57, so that the second film layer 41 can be coated on both sides. By means of the coating device 55, by means of a very wide variety of coating means 58 (only exemplified) for producing a very wide variety of functional layers (not explicitly shown in this second exemplary embodiment) can be produced on at least one of the individual film layers 40, 41 and 42.

The second separating device 30 essentially corresponds to the first separating device 29 of the first exemplary embodiment shown in FIG. With the second exemplary embodiment of the system 1 shown in FIG. 2, it is possible, in particular, to implement two further specific applications with regard to thermoforming, namely cases 3 and 4:

A third case also provides separate feeding of individual foils 40, 41 and 42 of different materials, by means of which also different properties, such as a barrier function, an electronic component function, a decoration function or the like, in particular for a packaging 2 or the like can be implemented, an application a bonding agent (such as a thermally activatable adhesive, see coating means 58) in the forming or product area 17 - residual film grid 45 remain uncoated - and a common molding of the films 40, 41 and 42 in a thermoforming process, wherein after forming the films 40, 41 and 42 are no longer separable connected to a multi-layer product 2, wherein the films 40, 41 and 42 of a resulting film residual grating 45, however, can be separated by, for example, wound directly separated and can be recycled. A fourth case provides a separate feeding of individual foils 40, 41 and 42 of different materials, by means of which also different properties, such as a barrier function, an electronic component function, a decoration function o- the like, in particular for a package 2 or the like can be implemented Applying a release agent (see coating agent 58) in the designated Folienla- genrestgitter 45, as well as a common molding of the films 40, 41 and 42 in a thermoforming process before, after forming the films 40, 41 and 42 to a multi-layer product 2 no longer separable However, the films 40, 41 and 42 of a resulting film residual grid 45 can be separated, for example, by being wound up directly separated and then recycled. The third exemplary embodiment of the system 1 shown in FIG. 3 differs in particular from the second exemplary embodiment (FIG. 2) of the system 1, essentially with respect to the third supply device 27 and the third separating device 31. In this respect, in the third embodiment, only the differences with regard to the second embodiment (Figure 2) are explained in order to avoid repetition. With regard to the same or equivalent features is also described on the explanations of the other embodiments.

On the one hand, in the case of the third feed device 27, the second film roll 38 (see FIG. 2) is dispensed with. In this respect, the modified roller frame 50 comprises only the first film roll 37 (first film layer 40) and the third film roll 39 (third film layer 42), ie a total of only two film rolls 37 and 39.

Thus, only by means of the individual film layers 40 and 42, only two layers 2A and 2C can be realized on the multilayer products 2.

On the other hand, accordingly, the third separating device 31 is designed without a second take-up roll 47 (see FIG. 2), and thus has altogether only two winding rolls 46 and 48, namely the first take-up roll 46 and the third take-up roll 48.

In order to realize a third layer (here now the layer 2B) on the multilayer products 2, a functional layer 61 (here layer 2B) is applied on one side to the third film layer 42 by means of a further coating device 60. In this third exemplary embodiment, the functional layer 61 applied by the further coating device 60 is a barrier layer formed on the multilayer products 2 (layer 2B).

With the third exemplary embodiment of the system 1 shown in FIG. 3, it is possible, in particular, to realize two further specific applications with regard to thermoforming, namely cases 5 and 6: A fifth case provides for a partial application of a barrier layer (61 or 2B) on one of the foils so that areas of the foil remainder grid 45 remain uncoated and for co-forming the foils in a thermoforming process leaving the foil remainder grating 45 uncoated Films can be separated from each other, and wherein the products 2 have a barrier layer and the films are there either separable or inseparable from each other.

A sixth case provides for partial application of a barrier layer (61 or 2B) on a single foil to leave areas of the foil remainder grid 45 uncoated, as well as forming the single foil in a thermoforming process, leaving the foil remainder grid 45 uncoated and recycled can be, and wherein the products 2 have a barrier layer.

The fourth exemplary embodiment of the installation 1 shown in FIG. 4 substantially corresponds to the first exemplary embodiment (FIG. 1), only with the difference that the third film layer 42 is decorative-printed with an interior decoration 2D. Otherwise, reference is made to the explanations in particular of the embodiment of Figure 1 in order to avoid repetition.

According to the further multilayer product 65 shown in Figures 5 and 6, it is a package (not separately numbered) which consists of a total of three layers 66, 67 and 68, an inside layer 66, an outside layer 67 and an intermediate layer , middle layer 68.

More specifically, the multilayer product 65 has a wall 69 constructed by the three layers 66, 67 and 68.

The multilayer product 65 is produced by means of the system 1 according to the first exemplary embodiment, the three layers 66, 67 and 68 being produced detachably from one another by means of three film layers (not numbered here). Thus, each of the three layers 66, 67 and 68 can be easily separated and recycled independently.

In the figure 7 only partially shown further multilayer product 70 is a container 71, which is provided with a decoration 72. The further multilayer product 70 is likewise distinguished by layers 73, 74 and 75, which are realized by three film layers (not explicitly numbered here), wherein both the three film layers and also the three layers 66, 67 and 68 are detachable from one another later after use of the container 71 separated from each other to be recycled. The decoration 72 is hereby created by printing on one of the film layers, wherein in this exemplary embodiment the layer 74 carries the decoration 72.

Due to the printing, the decoration 72 can also be regarded as a layer (not separately numbered) of the further multilayer product 70.

It should be explicitly pointed out at this point that the features of the solutions described above or in the claims and / or figures can optionally also be combined in order to be able to implement or achieve the explained features, effects and advantages in a cumulative manner.

It is understood that the above-described embodiments are only a first embodiment of the present invention. In this respect, the embodiment of the invention is not limited to these exemplary embodiments.

All disclosed in the application documents features are claimed as essential to the invention, provided they are new individually or in combination over the prior art. LIST OF REFERENCE NUMBERS

1 plant for the production of multilayer products

2 multilayer products

2A first layer

 2B second layer

2C third layer

 2D decoration (fourth layer)

 3 inlet side

 4 outlet side

 5 machine direction

6 processing distance

 10 thermoforming system

 11 forming device

 12 separation device

 13 heating device

14 stacking device

 15 lower tool

 16 upper tool

 17 forming areas

20 punch

21 lower part

 22 stamped part

 23 upper heating elements

 24 lower heating elements

 25 first feeding device

26 second feeder

 27 third feeder

 28 fourth feeding device

 29 first separating device

30 second separating device 31 third separating device

 32 fourth separating device

 35 Vorhalteeinrichtungen

 36 roller frame

 37 first roll of film

 38 second film roll

 39 third film roll

 40 first film layer

 41 second film layer

 42 third film layer

 43 semi-finished product

 44 film layer packet strand

 45 film residual layers

 46 first take-up roll

 47 second take-up roll

 48 third take-up roll

 50 modified caster frame

 51 vertical direction

 52 Merge device

 53 upper coating apparatus

55 coating

 56 upper coating apparatus

57 lower coating apparatus

58 coating agents

 60 more coating devices

61 functional layer

 65 more multilayer product

66 inside layer

 67 outside layer

 68 intermediate, middle layer

69 wall another multilayer product container

decoration

first shift

second layer third layer

Claims

claims: Method for producing a multilayer product (2, 65, 70) from a plurality of film layers (40, 41, 42), in which the plurality of film layers (40, 41, 42) in a forming region (17) are joined to the multilayer product (2, 65 70), in which for this purpose the film layers (40, 41, 42) are brought together and brought into coincidence, and in which the overlapping merged film layers (40, 41, 42) together, but areally detachable from each other to the multilayer product (2; 65; 70) are deformed. 2. A method for producing a multilayer product (2, 65, 70) from a plurality of film layers (40, 41, 42), wherein the plurality of film layers (40, 41, 42) in a forming region (17) to the multilayer product (2, 65 70), in which for this purpose the film layers (40, 41, 42) are brought together and brought into coincidence, in which the overlapping merged film layers (40, 41, 42) together, but areally detachable from each other to the multilayer product ( 2; 65; 70) and in which the combined film layers (40,41,42) are separated into one or more multilayer products (2; 65; 70) and a film layer rest grid (45), both the multilayer product (2; 65; 70) and the film layer remaining grid (45) at a later time again in the film layers (40, 41, 42) separated and can be provided for recycling. 3. A method for producing a multilayer product (2; 65; 70) from a plurality of film layers (40, 41, 42), wherein the plurality of film layers (40, 41, 42) in a forming region (17) to the multilayer product (2; 70) are converted, in which for this purpose the film layers (40, 41, 42) brought together and brought into coincidence, in which the overlapping merged film layers (40, 41, 42) together, but at least partially detachable from each other to the area Multilayer product (2; 65; 70) are deformed, and in which the merged film layers (40, 41, 42) are separated into one or more multilayer products (2; 65; 70) and into a film layer rest grid (45), the film layer rest grid (45) being reinserted into the film layers at a later time ( 40, 41, 42) can be separated and provided for recycling. A method for producing a multilayer product (2; 65; 70) from a plurality of film layers (40,41,42), wherein the plurality of film layers (40,41,42) in a forming region (17) are joined to the multilayer product (2; 65; 70 ), in which purpose in the forming area (17) an adhesion promoter is applied to at least one of the film layers (40, 41, 42), in which subsequently the film layers (40, 41, 42) are brought together and brought into coincidence, in which the film layers (40, 41, 42) which are brought together in a covering manner are deformed jointly but at least partially detachably from one another to the multilayer product (2; 65; 70), and in which the merged film layers (40, 41, 42) merge into one or a plurality of multilayer products (2; 65; 70) and separated into a film layer rest grid (45), wherein the film layer rest grid (45) at a later time again in the film layers (40, 41, 42) separated and ready for recycling can be made. Method for producing a multilayer product (2; 65; 70) from a plurality of film layers (40, 41, 42), wherein in the case of the plurality of film layers (40, 41, 42) in a forming region (17) to the multilayer product (2; 65; 70), in which a separating means for separating film layers (40, 41, 42) is applied to at least one of the film layers (40, 41, 42) outside the forming area (17), in which case the film layers (40, 41, 42) are brought together and in this case brought into coincidence, wherein the overlapping merged film layers (40, 41, 42) together but at least partially detachable from each other to the multilayer product (2; 65; 70) deformed, and in which the merged film layers (40, 41, 42) are separated into one or more multilayer products (2, 65, 70) and into a film layer rest grid (45), wherein the film layer rest grid (45) again separates into the film layers (40, 41, 42) at a later time and can be provided for recycling. 6. A method for producing a multilayer product (2, 65, 70) from a plurality of film layers (40, 41, 42), wherein the plurality of film layers (40, 41, 42) in a forming region (17) to the multilayer product (2, 65 70), in which purpose a functional layer (61) is applied to at least one of the film layers (40, 41, 42) only in the forming region (17), in which case the film layers (40, 41, 42) are subsequently brought together and here are brought into coincidence, in which the film layers (40, 41, 42) which are brought together in overlapping manner are deformed together, but at least partially detachably or non-detachably from one another to the multilayer product (2; 65; 70), and in which the merged film layers (40, 41, 42) are separated into one or more multilayer products (2; 65; 70) and a film layer remainder grid (45), the multilayer product (2; 65; 70) and / or the film layer remainder grid (45) becoming later Time again in di e film layers (40, 41, 42) separated and can be provided for recycling. 7. A method for producing a multilayer product (2, 65, 70) from a single film layer (40, 41, 42), wherein the single film layer (40, 41, 42) in a forming region (17) to the multilayer product (2; 65, 70), in which purpose a functional layer (61) is attached to the sole one of the film layers (40, 41, 42) only in the forming region (17), in which case the single film layers (40, 41, 42) is deformed into the multilayer product (2; 65; 70) and in which only the film layer (40,41,42) is separated into one or more multilayer products (2; 65; 70) and a film layer rest grid (45); Film layer residual grid (45) can be provided at least partially for reuse at a later time. 8. The method according to any one of claims 1 to 7, characterized in that when a decorative printed film layer (40, 41, 42) is supplied. 9. The method according to any one of claims 1 to 8, characterized in that as a functional layer (61) a barrier layer, an electronic layer or the like is attached or printed. 10. The method according to any one of claims 1 to 9, characterized in that the multilayer product (2; 65; 70) is formed in a thermoforming process and / or in an over-vacuum forming process. 11. The method according to any one of claims 1 to 10, characterized in that the film layers (40, 41, 42) after separation on a separating device (29; 30; 31; 32) on separate take-up rollers (46, 47, 48) separately be wound up in order to provide each film layer (40, 41, 42) separately for recycling. 12. The method according to any one of claims 1 to 11, characterized in that the foil layers (40, 41, 42) after separating at a separating device 29; 30; 31; 32) shredded and collected separately to provide each film layer (40, 41, 42) separately for recycling can. 13. A method for recycling different product materials for a preferably press- and / or thermoformed product, in particular for a multilayer product (2; 65; 70), in which one or more film layers (40, 41, 42) in a Umfombereich (17) be converted to the product, in which for this purpose the film layers (40, 41, 42) brought together and brought into coincidence and / or at least one film layer (40, 41, 42) is acted upon by a functional layer (61), in which the merged layers of film (40, 41, 42) in the forming area (17) are deformed together, but detachable from each other surface to the product, in which the merged film layers (40, 41, 42) in one or more products and in a film layer rest grid (45) are separated, and in which the together, but areally detachable film layers (40, 41, 42) of the Folienlagenrest- grid (45) and / or the product are separated from each other again to be made ready for sorting at a later time for recycling. 14. The method according to any one of claims 1 to 13, characterized in that the separated film layers (40, 41, 42) are melted, being produced from the molten materials again new film layers (40, 41, 42) for the manufacture of products. 15. System (1) for producing a multilayer product (2; 65; 70) from a plurality of film layers (40, 41, 42) having a forming device (11) formulating a forming region (17) for forming the film layers (40, 41, 42) to the multilayer product (2; 65; 70) and to a separating device (12) for separating out the multilayer product (2; 65; 70) from the film layers (40,41,42) and thereby producing a film layer remainder grid (45), in particular for carrying out one of the methods according to at least one of the preceding claims, characterized in that the installation (1) has a feed device (25; 26; 27; 28) with at least two supply devices (35) for holding at least two film layers (40, 41, 42) from different product materials, so that the at least two film layers (40, 41, 42) can be deformed together but detachably from the forming device (11) to the multilayer product (2; 65; 70). 16. System (1) according to claim 15, characterized in that the feed device (25; 26; 27; 28) comprises an assembly device (35; 52) for covering the at least two film layers (40,41,42) in a covering manner , 17. Plant (1) according to claim 15 or 16, characterized in that the supply device comprises a coating device (57; 60) for coating, in particular for partial coating, a film layer (40, 41, 42), which between the at least two Vorhalteeinrichtungen (35) and the forming device (11) and / or a heating device (13) of the system (1) is arranged. 18. An installation (1) for producing a multilayer product (2; 65; 70) from a single film layer (40, 41, 42) with a forming device (11) forming a forming area (17) for forming the single film layer (40, 41, 42) to the multilayer product (2; 65; 70), and with a separating device (12) for separating the multilayer product (2) from the film layer (40, 41, 42) and thereby producing a film layer remainder grid (45), in particular for performing a The method according to at least one of claims 1 to 14, characterized in that the system (1) comprises at least one coating device (57, 60) for coating, in particular for partial coating, the single film layer (40, 41, 42), wherein the at least one coating device (57, 60) is arranged between a provision device (35) for holding the single film layer (40, 41, 42) and the forming device (11) and / or a heating device (13) of the device (1). 19. System (1) according to one of claims 15 to 18, characterized in that the system (1) has a separating device (29; 30; 31; 32) for separating the previously at least two combined but detachable film layers (40, 41 , 42). 20. Plant (1) according to any one of claims 15 to 19, characterized in that the number of separating means (29; 30; 31; 32) for separating previously merged, but detachable film layers (40, 41, 42) of the number on Vorhalteeinrichtungen (35) for holding foil layers (40, 41, 42) corresponds. 21. Plant (1) according to any one of claims 15 to 20, characterized in that the plant (1) comprises a heating device (13) by means of which one or more film layers (40, 41, 42) are preheated for forming. 22. Semifinished product (43) for producing multilayer products (2; 65; 70) having at least two separate separate film layers (40, 41, 42), wherein the separate film layers (40, 41, 42) for forming into multilayer products (2; ; 70) are arranged releasably superimposed to a foil layer package (44) or foil layer stack. 23. Multilayer product (2; 65; 70) having one or more walls (69), in which at least one wall (69) has at least two layers (66, 67, 68; 73, 74, 75) which overlap one another by means of at least two adjoining film layers (40, 41, 42) are produced, wherein the at least two adjacent film layers (40, 41, 42) are arranged detachably adjacent to each other. 24. Multi-layer film layer rest grid (45) comprising at least two sheet-like covering layers (40, 41, 42) with recesses after the removal of multilayer products (2; 65; 70), wherein the at least two surface covering film layers (40, 41, 42) detachably are arranged adjacent to each other.