Multi-layer plastics laminate, and method for the production thereof

Abstract

The invention relates to a multi-layer recyclable plastics laminate (1) having a base layer (2) which is produced from a predetermined plastic, having a second layer (4) which is arranged at least indirectly on a first surface (2a) of this base layer (2) and is produced from a predetermined plastic, and preferably having at least one first cover layer (6) arranged at least indirectly on a second surface (2b) of the base layer (2), characterised in that the second layer (4) is or comprises a layer which is produced in an extrusion lamination process and which connects at least one further third layer (8) at least indirectly to the base layer (2), wherein furthermore the base layer (2), the second layer (4) and the third layer (8) are produced from the same or a related polyolefin, wherein preferably the polyolefin content of this polyolefin in the plastics laminate is greater than 70 vol.%, preferably greater than 80 vol.%, preferably greater than 90 vol.% and preferably greater than 95 vol.%.

Description

[0001] Multilayer plastic laminate and process for its production

[0002] Description

[0003] The present invention relates to a packaging material, and in particular to a plastic laminate for packaging purposes. Such plastic laminates have long been known in the prior art. Recently, however, the packaging industry in particular has placed increasing emphasis on the sustainability and recyclability of such packaging materials. To this end, attempts are being made to avoid the use of materials that are difficult or impossible to recycle, or to completely dispense with them.

[0004] In particular, the packaging industry as a whole is currently facing a transition from non-recyclable packaging materials to recyclable alternatives. Due to the existing infrastructure and economic advantages, the main focus of this transition is on the design of laminates that are amenable to mechanical recycling.

[0005] The applicant aims to improve the recyclability of such plastic laminates and proposes to replace packaging composed of different material groups with packaging made of only one single substance group.

[0006] In many prior art structures, the printed image is not printed on one of the outer layers of a packaging material. Instead, it is known from the prior art to apply the printed image in a so-called sandwich structure. While this has the advantage of protecting the printed image from external influences, it represents a significant disadvantage in the subsequent recycling process, as the printing ink cannot be removed from the packaging laminate. It is also known to bond different films or layers into a laminate using adhesives, for example, based on polyurethane or acrylates.

[0007] During subsequent recycling or regranulation of such laminates, which contain foreign substances in the form of printing inks, adhesives, incompatible plastics or coatings, these can lead to contamination in the recyclate, which can result in visual defects in the form of specks, streaks, etc. during subsequent processing of these recyclates, for example into plastic films. Furthermore, the above-mentioned foreign substances can produce migratory degradation products during the recycling process, which contribute to further contamination of the recyclate and prevent the reuse of such recyclate for food packaging or packaging for use in the medical sector.

[0008] The present invention is therefore based on the object of producing packaging materials and in particular laminates which enable reuse and / or satisfactory recycling of used packaging and the use of recyclate from such packaging for packaging materials for the food or medical sector.

[0009] This object is achieved according to the invention by the subject matter of the independent patent claims. Advantageous embodiments and further developments are the subject matter of the dependent claims.

[0010] A multi-layer and, in particular, recyclable plastic laminate according to the invention comprises a base layer made from a predetermined plastic. Furthermore, a second layer is provided, arranged at least indirectly on a first surface of this base layer, which second layer is made from a predetermined plastic and at least indirectly connects at least one further third layer to the base layer. Furthermore, preferably, at least one first cover layer is provided, arranged at least indirectly on a second surface of the base layer. It would also be possible to provide a print and / or a printed layer alongside or instead of this first cover layer.

[0011] Preferably, the plastic laminate is suitable and intended for packaging food and / or pharmaceutical products.

[0012] Furthermore, at least the base layer, as well as the second and third layers, are made of the same or a similar plastic, in particular polyolefin.

[0013] Related plastics include, but are not limited to, different plastics from a broader group of plastics, such as, but are not limited to, different polyolefins. When using such different plastics, particular attention must be paid to the recycling conditions.

[0014] A preferred embodiment of the multilayer plastic laminate is one in which the plastic-containing layers comprise a predetermined weight percentage of a single polyolefin. Unless otherwise stated within the scope of this invention, all percentages are to be understood as weight percentages.

[0015] In this context, the presence of a single polyolefin should preferably be understood to mean that further polyolefins could be present, but one type of polymer is present in at least a predetermined minimum proportion in one of the plastic-containing layers.

[0016] In this context, “a type of polymer” should be understood in such a way that the polymers can have different properties and can also differ in their molecular structure (for example in the (average) chain length) but are based on the same monomers.

[0017] Likewise, mixtures of different olefinic monomers could be present, but these are arranged differently in the polymers of the plastic-containing layers, for example, differing in their sequence within the polymer (random, alternating, blockwise). This has proven particularly advantageous for recycling, as it can reduce the number of different polymers to be recycled. Examples, but not limited to, include ethylene-vinyl alcohol copolymer (EVOH) and / or ethylene-vinyl acetate copolymer (EVA).

[0018] The plastics are particularly preferably polyolefins and in particular polypropylene (PP) or polyethylene (PE).

[0019] Preferably, a polyolefin content of the polyolefin in the plastic laminate (or generally a content of this plastic) is greater than 70 vol.%, preferably greater than 80 vol.%, preferably greater than 90 vol.% and preferably greater than 95 vol.%.

[0020] In the packaging industry, such structures are often referred to as monomaterial packaging. However, a monomaterial also refers to a plastic laminate that contains different types of a specific polyolefin, for example a blend of polyethylene of different densities, such as low-density PE (LDPE), medium-density PE (MDPE), or high-density PE (HDPE). Also conceivable is a blend of different polypropylenes, such as isotactic polypropylene (PP-it), atactic polypropylene (PP-at), or syndiotactic polypropylene (PP-st), or a blend of a specific polyolefin with a plastic that is sufficiently compatible with the polyolefin in terms of processability, such as, but not limited to, EVOH and / or EVA.

[0021] A recyclable plastic laminate is understood in particular to mean that at least portions of this material can be recycled and, in particular, can be (re)processed into further products. Preferably, at least 70% of the mass fraction of the plastic laminate can be recycled, preferably at least 80%, more preferably at least 90%, and most preferably at least 95%.

[0022] It is therefore proposed to use the same or similar materials for two or more layers and / or plies, which offers a significant advantage in particular with regard to recyclability.

[0023] In a preferred embodiment, the base layer comprises at least one further layer. Therefore, the base layer itself is preferably constructed in multiple layers. Advantageously, the base layer comprises at least one substrate layer, one bonding layer, and one barrier layer.

[0024] Particularly preferably, the base layer consists of a substrate layer, a bonding layer and a barrier layer.

[0025] In a further advantageous embodiment, the substrate layer comprises HDPE, wherein preferably a proportion of HDPE is greater than 60 vol% (and / or greater than 60 wt%), preferably greater than 70 vol% (and / or greater than 70 wt%) and particularly preferably greater than 80 vol% (and / or greater than 80 wt%).

[0026] The HDPE content can approach 100 vol.%, although 100 vol.% is generally never achieved due to common additives. The remainder is a compatible polyolefin material. Compatible polyolefin materials can generally be any type of polyethylene, such as linear low-density polyethylene (LLDPE), linear metallocene low-density polyethylene (mLLDPE), or even ethylene copolymers, such as ethylene-vinyl acetate copolymer (EVA).

[0027] Furthermore, polypropylene (PP) or a cycloolefin copolymer (COC) can be used as a compatible polyolefin material in a maximum amount of 20 vol. The HDPE and the compatible polyolefin material can be present as a mixture in the substrate layer. However, the substrate layer can also be multilayered (extruded or co-extruded) with one (or more) HDPE layer(s) and one (or more) layer(s) of the compatible polyolefin material. The thickness of the base layer is preferably 5 to 35 μm.

[0028] The barrier layer preferably consists of (or has) a barrier polymer, i.e., a polymer with sufficient barrier properties, particularly but not exclusively against oxygen, water (vapor), and / or aroma. EVOH is preferably used as the barrier polymer. The barrier layer preferably has a thickness of 2-8 μm. The low thickness of the barrier layer preferably does not compromise recyclability.

[0029] The bonding layer preferably connects the barrier layer to the substrate layer. This should ensure sufficient bond adhesion. Suitable bonding layers are preferably made of polymers with increased polarity, for example, based on maleic anhydride-modified polyolefins (such as PE or PP), ethylene-vinyl acetate copolymer (EVA), ethylene / acrylic acid copolymer (EAA), ethylene-butyl acrylate copolymer (EBA), or similar polyolefin copolymers. The thickness of a bonding layer is advantageously 1 to 5 μm.

[0030] The proportion of polar molecular groups is preferably at least 5%, preferably at least 10%. For example, a 30% blend of an EAA with 20% acrylic acid monomer content with an LDPE can be used as the material for the tie layer.

[0031] In a further embodiment, the base layer comprises only a single layer of a polyolefin or of a blend of polyolefin and a compatible polyolefin material as described above.

[0032] Preferably, the second layer comprises or is a (connecting) layer produced by a lamination process, particularly preferably by a laminating process and / or preferably by an extrusion laminating process, which connects a (further) third layer at least indirectly to the base layer.

[0033] It would also be conceivable to use an adhesive lamination (e.g., based on polyurethane (PU) or acrylate) in the lamination process. In particular, lamination with a non-polyolefin adhesive specifically developed for the recycling process might be suitable, yet still produce recyclate suitable for food / pharmaceutical packaging.

[0034] In a further preferred embodiment, the plastic laminate has a third layer or at least three layers are provided.

[0035] In a further preferred embodiment, the third layer comprises or is a polyolefin and preferably represents an outer layer of the plastic laminate. Preferably, the third layer comprises or is an activatable, in particular a thermally activatable layer and has a sealing start temperature which is < 160 °C, preferably < 150 °C, preferably < 140 °C, preferably < 130 °C, preferably < 120 °C, preferably < 110 °C, preferably < 100 °C, preferably < 90 °C and preferably < 80 °C.

[0036] In a further advantageous embodiment, the plastic laminate has a further or fourth layer, wherein this further layer is preferably arranged at least indirectly between the second layer and the third layer.

[0037] This fourth layer is preferably a film, preferably produced by extrusion, from a plastic of the same or a similar type as the base layer and the third layer.

[0038] In a further advantageous embodiment, the plastic laminate has a fifth layer, wherein this fifth layer preferably comprises or is a (connecting) layer produced by a lamination process, particularly preferably by a laminating process and / or preferably by an extrusion laminating process, which connects the third layer at least indirectly to the fourth layer.

[0039] It would also be conceivable to use an adhesive lamination (e.g., based on polyurethane (PU) or acrylate) in the lamination process. In particular, lamination with a non-polyolefin adhesive specifically developed for the recycling process might be suitable, yet still produce recyclate suitable for food / pharmaceutical packaging.

[0040] In a further preferred embodiment, this fifth layer comprises the same or similar materials as the second layer.

[0041] Particularly preferably, the said layers (base layer, second layer, third layer, fourth layer and / or fifth layer) are predominantly and particularly preferably entirely composed of the same or a similar plastic.

[0042] The base layer and / or the fourth layer preferably has a mass fraction of at least 75%, preferably at least 80%, preferably at least 90%, preferably at least 95%, preferably at least 97%, and preferably at least 99% of this plastic. The third layer preferably has a mass fraction of at least 85%, preferably at least 90%, preferably at least 95%, preferably at least 97%, and preferably at least 99% of this plastic.

[0043] The second layer and / or the fifth layer preferably comprises at least 75%, preferably at least 80%, preferably at least 85%, preferably at least 90%, and preferably at least 95% of an identical or similar plastic or its base monomer, preferably ethylene or propylene, as the base layer and the third layer. The remaining portion can be composed, among other things, of polar comonomers such as, preferably, acrylic acid (AA), vinyl acetate (VA), maleic anhydride, or butyl acrylate, to improve adhesion, for example, to metallized films.

[0044] In a further advantageous embodiment, at least one of the layers and in particular the base layer, the third layer and / or the fourth layer additionally comprises an inorganic coating which contains at least one substance selected from a group comprising a metal, a semi-metal, a metal oxide, a semi-metal oxide, aluminum, copper, titanium, gold, silver, aluminum oxide (AlOx), silicon oxide (SiOx), or mixtures thereof and which can provide the plastic laminate with barrier properties, in particular but not exclusively against oxygen, water (vapor) and / or aroma.

[0045] In a further preferred embodiment, a barrier coating with barrier properties, particularly but not exclusively against oxygen, water (vapor), and / or aroma, is applied to at least one of the layers using a method known from the prior art. The barrier coating preferably comprises a material compatible with polyolefins and is applied with an application weight of between 0.5 g / m 2 and 5 g / m 2 applied.

[0046] In a further advantageous embodiment, at least one of the layers, and in particular the base layer, the third layer, and / or the fourth layer, comprises or is a film produced in an extrusion process, preferably a film produced in an extrusion process and stretched in at least one direction. In a preferred embodiment, at least one of the layers, and in particular the base layer, the third layer, and / or the fourth layer, is multi-layered. The cover layer is preferably arranged at least indirectly on the second surface of the base layer. In a preferred embodiment, the cover layer is a coating and serves to protect the underlying printing ink. Conceivable embodiments of the cover layer include, for example but not exclusively, polyurethane (PI1), polyvinyl butyral (PVB), nitrocellulose (NC), and / or acrylate-based overprint varnishes.

[0047] The cover layer is preferably temperature-resistant up to 160°C, preferably up to 180°C, particularly preferably up to 200°C. Temperature resistance is defined within the scope of this invention such that the cover layer neither sticks nor undergoes visible deformation upon contact with a hot sealing jaw.

[0048] Particularly preferably, the cover layer is arranged on the outside with respect to the plastic laminate and / or has a surface which is an outer surface of the plastic laminate.

[0049] In a further preferred embodiment, the plastic laminate has a print and / or imprint (in particular having colors) and this print and / or imprint is preferably arranged at least indirectly or preferably directly on the second surface of the base layer.

[0050] In a preferred embodiment, this print and / or imprint is provided instead of the first cover layer.

[0051] Particularly preferably, this print is a print applied by means of a printing process known from the prior art, such as, but not exclusively, gravure printing, flexographic printing or digital printing.

[0052] In a further advantageous embodiment, a further layer is preferably arranged at least indirectly between the printing layer and the base layer. In a further advantageous embodiment, this layer is a coating that promotes the detachment of the printing ink from the base layer.

[0053] Preferably, the plastic laminate extends in a longitudinal direction, a width direction perpendicular to the longitudinal direction and a thickness direction perpendicular to the longitudinal direction and the width direction.

[0054] Preferably, the first and second surfaces of the base layer extend in the longitudinal direction and in the width direction.

[0055] Preferably, the base layer has a thickness (extending in the thickness direction) that is greater than 5 pm, preferably greater than 10 pm and particularly preferably greater than 15 pm.

[0056] Preferably, the base layer has a thickness (extending in the thickness direction) that is less than 60 pm and preferably less than 50 pm.

[0057] Preferably, the second layer has a thickness (extending in the thickness direction) which is greater than 0.5 pm, preferably greater than 1 pm, preferably greater than 2 pm and particularly preferably greater than 3 pm.

[0058] Preferably, the second layer has a thickness (extending in the thickness direction) which is less than 20 pm, preferably less than 15 pm and particularly preferably less than 10 pm.

[0059] Preferably, the cover layer has a thickness (extending in the thickness direction) which is greater than 0.3 pm, preferably greater than 0.7 pm, particularly preferably greater than 1.5 pm.

[0060] Preferably, the cover layer has a thickness (extending in the thickness direction) which is less than 10 pm, preferably less than 8 pm, particularly preferably less than 5 pm.

[0061] Preferably, the coating between the base layer and the print has an application weight which is less than 10g / m 2 , preferably less than 8g / m 2 and preferably less than 5g / m 2 .

[0062] Particularly preferably, the coating between the base layer and the print has a coating weight which is greater than 0.5 g / m 2 preferably more than 1g / m 2 and preferably more than 2g / m 2 is.

[0063] Preferably, the third layer has a thickness (extending in the thickness direction) that is greater than 5 pm, preferably greater than 10 pm and particularly preferably greater than 15 pm.

[0064] Preferably, the third layer has a thickness (extending in the thickness direction) which is less than 150 pm, preferably less than 100 pm, particularly preferably less than 70 pm.

[0065] Preferably, the fourth layer has a thickness (extending in the thickness direction) that is greater than 5 pm, preferably greater than 10 pm and particularly preferably greater than 15 pm.

[0066] Preferably, the fourth layer has a thickness (extending in the thickness direction) that is less than 60 pm and preferably less than 50 pm.

[0067] Preferably, the fifth layer has a thickness (extending in the thickness direction) that is greater than 0.5 pm, preferably greater than 1 pm, preferably greater than 2 pm and particularly preferably greater than 3 pm.

[0068] Preferably, the fifth layer has a thickness (extending in the thickness direction) which is less than 20 pm, preferably less than 15 pm and particularly preferably less than 10 pm.

[0069] Preferably, the plastic laminate has a thickness (extending in the thickness direction) which is greater than 10 pm, preferably greater than 20 pm, preferably greater than 30 pm, preferably greater than 40 pm.

[0070] Preferably, the plastic laminate has a thickness (extending in the thickness direction) which is less than 400 pm, preferably less than 350 pm, preferably less than 300 pm, preferably less than 250 pm.

[0071] The present invention is further directed to a regranulate produced (at least partially and preferably entirely) from a plastic laminate of the type described above. Preferably, the regranulate is made of at least 70%, preferably at least 80%, and preferably at least 90% of the plastic laminate of the type described above.

[0072] Regranulates are, in particular, plastics produced during the recycling of plastic waste. The waste is typically shredded, washed, dried, melted, and reformed into granules to create regranulate. The regranulates can then be reused as raw materials and processed.

[0073] Today, there is a widespread requirement that the plastic granules used in the extrusion of plastic films contain at least a portion of recycled plastic. Recycled plastic is obtained from the recycling of production waste, and in particular from waste generated by end users and returned via suitable collection and sorting systems as part of the circular economy. In the mechanical recycling process, plastic waste is mechanically shredded and processed into recycled plastic in the form of regranulated plastic. The plastic waste is sorted beforehand to obtain the most pure plastic recyclate possible. Against this background, as mentioned above, the packaging materials (and / or the materials of the individual components) are advantageously composed of a single polymeric component, such as, in particular, but not exclusively, polyethylene or polypropylene.

[0074] Due to the inventive arrangement of the printing ink on the outer side of the plastic laminate, the printing ink can be removed from the packaging material in a washing process taking place in the recycling process, which is not possible or only possible to a limited extent in structures known from the prior art with a non-external printing layer and leads to the contamination in the plastic recyclate already described, which in turn precludes further use of such recyclates for films for direct food contact.

[0075] The single-variety plastic laminate described above therefore forms a good basis for the production and use of a plastic recyclate, which is used in extrusion, particularly but not exclusively in the cast film extrusion or blown film extrusion process, in order to produce high-quality films that can be used for direct food contact.

[0076] A major disadvantage of extrusion lamination compared to adhesive lamination is the high amount of waste generated during the lamination process. This is particularly problematic when it comes to small and medium print runs / job sizes, which have become prevalent in recent years, particularly due to the increased differentiation of different print designs.

[0077] The shift from counter-printing in a sandwich structure to surface printing addresses this disadvantage in addition to the intended improved recyclability. With a limited number of layers or film combinations, the current manufacturing sequence can be changed from individual production runs to a process that provides semi-finished extrusion laminates, which can also be produced in high qualities and large quantities.

[0078] The print jobs can preferably be carried out based on already laminated stock material.

[0079] The present invention further relates to a film, wherein the film is produced (at least partially and preferably completely) with a regranulate of the type described above. This film preferably has a proportion of at least 50%, preferably at least 60%, preferably at least 70%, preferably at least 80%, preferably at least 90% of this regranulate. In addition to the regranulate, it may also contain additives or new or non-recycled granules.

[0080] Furthermore, the invention is directed to a plastic packaging which comprises a plastic laminate of the type described above and / or which is at least partially and preferably completely made of such a plastic laminate.

[0081] In particular, this plastic packaging is suitable and intended for packaging food and / or pharmaceutical products. The present invention is further directed to a method for producing a plastic laminate, in particular a plastic laminate of the type described above, comprising the following steps.

[0082] In a first process step, an extrusion and in particular co-extrusion of a base layer takes place, which preferably has at least one substrate layer, a connecting layer and a barrier layer (which in particular consists of or contains a barrier polymer).

[0083] In a further process step (in particular a second process step following the first process step), the base layer is bonded to another layer by means of extrusion lamination.

[0084] In a further (particularly subsequent) process step, the base layer is printed.

[0085] Preferably, the steps mentioned here are carried out in the specified order, in particular printing is preferably carried out after the base layer has been bonded to the further layer.

[0086] Preferably, the co-extrusion is carried out by means of an extrusion process which is selected from a group of extrusion processes which includes cast film processes and blown film processes.

[0087] The substrate layer is preferably made of HDPE. In another preferred process, the barrier polymer is EVOH.

[0088] In another preferred method, the base layer is stretched. This stretching preferably occurs before the base layer is bonded to the further layer. Stretching preferably occurs in at least one and preferably in at least two directions.

[0089] In another preferred method, a further or fourth layer is added. This fourth layer is preferably bonded to the base layer. Particularly preferably, the fourth layer is bonded to the base layer by means of a lamination process, in particular by extrusion lamination.

[0090] In a further preferred method, this fourth layer is bonded to the third layer. Particularly preferably, the fourth layer is bonded to the third layer by means of a lamination process, in particular by extrusion lamination.

[0091] Further advantages and embodiments are shown in the attached drawings, which show:

[0092] Fig. 1 shows a plastic film according to the invention in a first embodiment; and

[0093] Fig. 2 shows a plastic film according to the invention in a second embodiment.

[0094] Fig. 1 shows a first embodiment of a multilayer plastic laminate 1 according to the invention. This laminate extends in a longitudinal direction L, which is perpendicular to the plane of the figure, a width direction B, and a thickness direction D.

[0095] A base layer 2 is provided, which has a first surface 2a and a second surface 2b, which is opposite the first surface 2a. Both surfaces 2a, 2b extend in the longitudinal direction L and the width direction B.

[0096] This base layer is preferably made of (especially stretched) PE or (especially stretched) PP. This ensures sufficient stability and / or the necessary mechanical properties.

[0097] Reference numeral 4 denotes a second layer arranged on the first surface 2a. This second layer is preferably an extrusion lamination and / or an extrusion laminated layer. This layer is preferably made of PE or PP. If the base layer 2 is made of PE, the second layer 4 is preferably also made of PE, and if the base layer is made of PP, the second layer 4 is preferably also made of PP.

[0098] On the second surface 2b of the base layer, a coating 12 (printing pre-varnish) is optionally provided and further preferably one or more printing inks 14. The coating 12 is preferably provided between the base layer 2 and the printing ink(s) 14.

[0099] This coating 12 or pre-printing varnish facilitates the removal of the printing ink 14 from the base layer 2.

[0100] Reference numeral 6 denotes a cover layer arranged on the printing ink(s). In particular, this is a lacquer layer, and in particular a transparent lacquer layer.

[0101] A further third layer 8, which preferably consists of (in particular blown) PE or CPP, is preferably arranged on the extrusion lamination 4 (i.e., the second layer). This further cover layer is preferably made of the same or a similar plastic as the base layer 2 and layer 4.

[0102] It is advantageous that the third layer 8 consists at least partially of a polyolefin with a sealing start temperature below 100 °C, preferably below 80 °C.

[0103] In this way, the temperature difference between the melting point of the cover layer (see paragraph on cover layer) and the melting point of the third layer 8 is at least 60°C, preferably at least 80°C, further preferably at least 100°C and particularly preferably at least 120°C.

[0104] Fig. 2 shows a further embodiment of a plastic film according to the invention.

[0105] In this embodiment, a further, fourth layer 16 is present between the second layer 4 and the third layer 8, which is preferably made of (particularly stretched) PP or (particularly stretched) PE. This further layer is also preferably made of the same plastic as the base layer. The further layer preferably comprises a metallized and / or AlOx / SiOx vapor-deposited layer.

[0106] Between this fourth layer 16 and the third layer 8, a further, fifth layer 18 is preferably provided, which is preferably again an extrusion lamination and / or an extrusion-laminated layer. This layer is preferably also made of the same material as the base layer.

[0107] The applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are novel, individually or in combination, over the prior art. It is further noted that the individual figures also describe features that may be advantageous in and of themselves. The skilled person will immediately recognize that a specific feature described in a figure may be advantageous even without adopting further features from that figure. Furthermore, the skilled person will recognize that advantages may also arise from a combination of several features shown in individual or different figures.

Claims

Patent claims 1. Multilayer recyclable plastic laminate (1) comprising a base layer (2) made of a predetermined plastic, a second layer (4) made of a predetermined plastic arranged at least indirectly on a first surface (2a) of this base layer (2), and preferably at least one first cover layer (6) arranged at least indirectly on a second surface (2b) of the base layer (2), characterized in that the second layer (4) is or comprises a layer produced in an extrusion lamination process, which connects at least one further third layer (8) at least indirectly to the base layer (2), wherein the base layer (2), the second layer (4) and the third layer (8) are made of the same or a related polyolefin, wherein preferably the polyolefin content of this polyolefin in the plastic laminate is greater than 70 vol.%, preferably greater than 80 vol%, preferably greater than 90 vol% and preferably greater than 95 vol%.

2. Plastic laminate according to claim 1, characterized in that the base layer (2) has at least one further layer and preferably the base layer has at least one substrate layer, a bonding layer and a barrier layer.

3. Plastic laminate (1) according to at least one of the preceding claims, characterized in that at least one of the layers (2, 8, 16) is stretched in at least one direction.

4. Plastic laminate (1) according to at least one of the preceding claims, characterized in that the base layer (2) has a thickness greater than 5 pm, preferably greater than 10 pm and particularly preferably greater than 15 pm and / or the base layer (2) has a thickness less than 60 pm, preferably less than 50 pm.

5. Plastic laminate according to at least one of the preceding claims, characterized in that the plastic film has a print (14) and this print is preferably arranged at least indirectly between the second surface (2b) of the base layer (2) and the first cover layer (6) and this print is particularly preferably provided instead of the first cover layer (6) and represents an outer layer of the plastic laminate (1) and is arranged at least indirectly on the second surface (2b) of the base layer (2).

6. Plastic laminate according to at least one of the preceding claims, characterized in that a coating (12) is arranged between the base layer (2) and the print (14), wherein this coating (12) has a coating weight of less than 10 g / m² 2 , preferably less than 8 g / m² 2 and in particular preferably less than 5 g / m³ 2and / or this coating (12) has an application weight of more than 0.5 g / m² 2 , preferably more than 1 g / m³ 2 , and in particular preferably more than 2 g / m³ 2 exhibits and facilitates the removal of the print (12) during the recycling process.

7. Plastic laminate (1) according to at least one of the preceding claims, characterized in that the first cover layer (6) is a thermally resistant coating with a temperature resistance of greater than 160°C, preferably greater than 180°C and particularly preferably greater than 200°C, and a thickness of less than 10 pm, preferably less than 8 pm, particularly preferably less than 5 pm and / or with a thickness of more than 0.3 pm, preferably more than 0.7 pm, particularly preferably more than 1.5 pm.

8. Plastic laminate (1) according to at least one of the preceding claims, characterized in that the plastic laminate has a fourth layer (16), wherein this further layer preferably is arranged at least indirectly between the second layer (4) and the third layer (8).

9. Plastic laminate (1) according to at least one of the preceding claims, characterized in that the plastic laminate has a fifth layer (18) which connects the third layer (8) at least indirectly with the fourth layer (16) and preferably this fifth layer is or has a layer produced in a lamination process and preferably a layer produced in an extrusion lamination process.

10. Plastic laminate (1) according to at least one of the preceding claims, characterized in that at least one of the layers and in particular the base layer, the third layer and / or the fourth layer is an inorganic coating which contains at least one substance selected from a group comprising a metal, a semimetal, a metal oxide, a semimetal oxide, aluminum, copper, titanium, gold, silver, aluminum oxide (AlOx), silicon oxide (SiOx), or mixtures thereof and which can provide the plastic laminate with barrier properties, in particular but not exclusively against oxygen, water (vapor) and / or aroma.

11. Plastic laminate (1) according to at least one of the preceding claims, characterized in that at least one outer layer comprises an activatable and in particular a thermally activatable film and in particular a sealing film.

12. Plastic laminate (1) according to at least one of the preceding claims, characterized in that the third layer (8) consists of a polyolefin and preferably has a sealing start temperature of < 160 °C, preferably < 150 °C, preferably < 140 °C, preferably < 130 °C, preferably < 120 °C, preferably < 110 °C, preferably < 100 °C, preferably < 90 °C and preferably < 80 °C.

13. Plastic laminate (1) according to at least one of the preceding claims, characterized in that The extrusion lamination comprises a predetermined proportion of at least 75%, preferably at least 80%, preferably at least 85%, preferably at least 90% and preferably at least 95% of the same or related plastic or its base monomer, preferably ethylene or propylene, as the base layer and the third layer, wherein the remaining proportion preferably comprises polar comonomers such as preferably acrylic acid (AA), vinyl acetate (VA), maleic anhydride, butyl acrylic acid ester, to improve adhesion, for example, to metallized films.

14. Regranulate, at least partially, produced from a plastic laminate according to one of the preceding claims, wherein preferably the regranulate is produced from the plastic laminate (1) to at least 70%, preferably to at least 80%, preferably to at least 90%.

15. Film, in particular for packaging material, characterized in that the film is produced, at least partially, from a regranulate according to claim 14.

16. Plastic packaging, especially for food and / or pharmaceutical products, made from a plastic laminate (1) according to at least one of the preceding claims.

17. Method for producing a plastic laminate comprising the following steps: - Extrusion and in particular co-extrusion of a base layer (2) which preferably comprises at least one substrate layer, one bonding layer and one barrier layer made of a barrier polymer; - Joining the base layer (2) to the further layer (8) by means of extrusion lamination and / or applying a print to the base layer.

Images