NL8302706A - CARDBOARD, PREFERABLY FOR ORDNERS, RINGBANDS AND OTHER ORGANIZATIONAL AND OFFICE NEEDS, WHICH SHALL BE POLYALOQUE-COATED. - Google Patents

Description

V

N.0. 31,961 1 *; *

Cardboard, preferably for binders, ring binders and other organization * and office needs, with a polyolefin coating.

The present invention relates to a polyalkene lined board, preferably for binders, ring binders and other organizational and office needs, which is provided on at least one surface with two thin layers of olefin resin material superimposed on one another , which has a different polarity and density in each layer. The polyolefin layer consists of a polyolefin combination film, which is composed of at least two layers, which is applied on at least one side of the cardboard or which covers one side of the cardboard completely with at least one strip-shaped or frame-shaped overlap of surrounds the cardboard on the other side, preferably with a second polyolefin combination film wrapped in strip or framing overlap of the first polyolefin combination film to completely wrap the cardboard. The polyolefin combination sheet is of a hot-melt adhesive film as the bottom sheet of a given polyolefin-based composition having a density greater than the density of the top sheet and at least one surface sheet of defined composition having a density of 0.89-0.93 g / cm 2, preferably 0.90 - 0.926 g / cm 2 compound, the cardboard immediately communicating with the melt-adhesive film or melt-adhesive layer without simultaneous application of an adhesive layer and a thickness of 0.3-5 mm , preferably 1-3 mm.

It is already known to coat paper or cardboard material with an article of paper or cardboard on at least one surface with a low density polyethylene resin material and a second coating of a high density resin material on the outer surface of the low density resin material. density (see German Offenlegungsschrift 2,530,477). This method serves for sealing paper and cartons of material, in order to produce a liquid-tight material, for example for milk packaging and other packaging in dairies, with the aid of the coating carried out.

These seals for liquid-tight packages using coatings with a particular polyethylene resin material intervene between the layers of high-density polyethylene and are, however, unsuitable if the carton is to be used for another purpose and to be coated by other methods. In particular, liquid-tight seals according to German Offenlegungsschrift 2,530,477 are not suitable, because when a subsequent formation with 40 sharp contours, such as in the manufacture of cardboard with coated surface, for organizational purposes, for example, for files, ring binders, envelopes and the like, temperatures above 90 ° C are required. In addition, the moisture contained in the carton would cause blowing when molding without cooling under pressure.

The aim and task of the present invention was therefore to avoid the additional application of adhesive to the cardboard and / or the foil, nevertheless to achieve a good adhesion of the surface layer and, if possible, to improve the properties at shorter production times. of the foil and the assembly, preferably to achieve an improved formability of the foil and cardboard assembly.

The danger of embrittlement through loss of plasticizer should be avoided as much as possible.

Due to the elimination of the use of additional adhesives, preheating or postheating of the layers, resp. adhesive layers for the purpose of pre-drying or evaporating the solvent or diluent of the adhesive as far as possible.

According to the invention it has been determined that these purposes and tasks are provided by a polyolefin-coated cardboard, preferably for binders, ring binders and other organizational and office needs, that on at least one surface of two superimposed thin layers of an olefin resin material is provided, are satisfied. The polyolefin coating consists of a polyolefin combination foil, which is composed of at least two layers, which is applied on at least one side of the cardboard or which completely covers one side of the cardboard with at least one strip-shaped or frame-shaped surrounds the cardboard overlap on the other side, preferably with a second polyolefin combination film under strip * or frame overlapping the first polyolefin combination film encloses the cardboard completely *. The polyolefin combination film according to the invention consists of (1) a melt * adhesive film as bottom foil, consisting of (1.1) an olefin homogene *, * copolymer or olefin homogene *, respectively. copolymer mixture, which in total (based on the total plastic mixture for the melt * adhesive film) 33 * 5 wt.%, preferably 30 * 7 wt.% of a polar monomer or polar mono * mer mixture in the form of the solid or liquid monomeric or copolymerized compounds, preferably as polar comonomer (s), with (1.2) a melting point resp. melting range of 50 * 95 ° C, preferably 60 * 90 ° C, and (1.3) a density greater than the density of the top foil (1.4) with a melt index 190 / 2.16 less than 10 g / 10 min. , and (2.) at least one surface film consisting of (2.1) a 40 olefin homo *, olefin copolymer, a polar group-containing olefin copo * 8302706 3 Λ 41 polymer, or an olefin homo. olefin copolymer mixture, which (2.2) has a melting point resp. melting range above 100 ° C, preferably 105 ° C, (2.3) has a melt index 190 / 2.16 less than 10 g / 10 min, (2.4) a hardness less than 50 Shore D and (2.5) a density of 0.91-0.93 g / cm 2, preferably 0.915-0.926 g / cm 2, wherein the (3.) carton without the simultaneous use of an adhesive layer is immediately coated with the melt-adhesive film or melt-adhesive layer and (3.1) has a thickness of 0.3-5 mm, preferably 1-3 mm.

The use or simultaneous use of propylene homo- or 10 copolymers for the surface film results in a density of 0.89-0.915 g / cm 2 and a hardness of less than 65 Shore D, so that in total for the surface film (when used of propylene and / or ethylene homo (or copolymers) a hardness less than 65 Shore D, preferably less than 50 Shore D and a density range of 0.89-0.93 g / cm 2, preferably 0, 90 * 0.926 g / cm ^, to be taken as the basis.

In the polyolefin combination film according to the invention, therefore, the additional application of adhesives on the cardboard and / or the film is omitted; likewise, pre-heating of the adhesive layer to evaporate the diluent of the adhesive is not required. Shorter production times are achieved. Pre-drying of the cardboard is also not required because the sealing point of the hot-melt adhesive film is below the evaporation temperature of the moisture contained in the cardboard. Good adhesion of the melting film to the cardboard and to the surface film at the seam location is obtained.

Due to the high viscosity of the hotmelt adhesive layer, the foil and cardboard assembly can be formed during gluing without requiring accelerated cooling with or without pressure.

According to a preferred embodiment, the polyolefin combination film composed of the melt-adhesive film (1) and at least one surface film has a thickness of 50-400 µm, preferably 80-300 µm, in addition the melt-adhesive film a thickness of 5-50 µm, preferably 10-30 µm.

According to a preferred embodiment, the polar group-containing olefin copolymer or olefin copolymer mixture consists of (1.1.1) or contains at least one ethylene and / or propylene copolymer, with a total of 33-5 wt%, preferably 30 -7% by weight of a polar monomer or a polar monomer mixture as a comonomer (comononation) or 40 as polar units in the total plastic mixture for the hot-melt adhesive films. The olefin copolymer or olefin copolymer mixture is preferably used By copolymerizing the polar monomer reap, the polar monomer mixture is prepared with an ether and / or propylene homo and / or copolymer.

In another preferred embodiment, the polar group-containing olefin copolymer mixture of (1.1.2) consists of a non-polar group containing ethylene and / or propylene homo- and / or copolymer or a polar group containing olefin copolymer ethylene copolymer containing preferred polar groups, which is prepared by copolymerization with 10-70 wt.%, preferably 25-60 wt.% of a polar monomer or polar monomer mixture, provided that in total 33-5 wt.%, preferably 30-7% by weight, of a polar monomer or a polar monomer mixture as comonomer (s) or as polar units in the total plastic mixture for the hot-melt foils.

Furthermore, (1.1.3) is the melt index (190 / 2.16). of the polyolefin copolymerized with one or more polar monomers and / or mixture of polyolefins with copolymers with polar monomers of the hot-melt adhesive film less than 10 g / 10 min., preferably less than 8 g / 10 min.

According to a preferred embodiment, the melt-adhesive film additionally (1.1.4) contains an inorganic filler or an inorganic filler mixture as an anti-blocking agent. The surface film also expediently (2.1.2) contains an inorganic filler or an inorganic filler mixture, which preferably serves as a matting agent.

According to a preferred embodiment, per 100 parts by weight of the synthetic resin, respectively. the synthetic resin mixture for the hot-melt adhesive film and / or the surface film uses 0-40 parts by weight, preferably 0.5-20 parts by weight, of a filler or filler mixture. The filler resp. the filler mixture should be very finely divided.

Per 100 parts of the synthetic resin resp. the synthetic resin mixture is added 0.3-5 parts by weight, preferably 0.5 * 3 parts by weight, of one or more processing aids for the hot-melt adhesive film and / or the surface film.

Because both the top film and the hot-melt adhesive film are low in plasticizer (plasticizer content less than 3% by weight), it is preferably free of primary and / or primary. According to the invention, the films according to the invention have liquid plasticizers have the advantage that a plasticizer loss cannot occur or can occur only to a very reduced extent.

Within the scope of the present invention, free from plasticizer is understood to mean that the formulations are free from primary and liquid plasticizers or free from other external plasticizers. By plasticizer 8302706 5 is meant that they have only a very low content of primary resp. possess liquid plasticizers, for example in formulations containing pigments, dyes or fillers simultaneously

As polar copolymerized polyolefins resp. as polar groups containing olefin copolymers are preferably used those ethylene * vinyl acetate * copolymer with a vinyl acetate content of 33 * 5 wt.%, preferably 30 * 7 wt.%, and / or alkyl * resp. olefin acrylates, in particular ethylene acrylate and / or butyl * and / or isobutyl acrylate, contain *.

These required properties can also be achieved with mixtures of polyolefins and copolymers with a higher content of the above-mentioned monomers in a ratio such that the proportion of these monomers is 33 * 5% by weight, preferably 30 * 7% by weight. % in the mixture.

In one embodiment, the polyolefin blends or olefin copolymer blends may also contain by weight up to 15 wt.%, Preferably up to 10 wt.%, By weight of other plastics, for example, EPDM (terpolymer of ethylene, propylene, and a diene with an unsaturated part of the diene in the side chain), EPM (ethylene * propylene * copoly * more) etc.

The surface foil preferably consists of (2.1.3) polyethylene, preferably high-pressure polyethylene, polypropylene or. the copolymers or mixtures thereof with α-olefin polymers, the modulus of elasticity being less than 10 ^ kp / cm ^, preferably less than 10 ^ kp / cm ^ and the Shore D hardness less than 65, preferably less than 50.

The polyolefin * combination film composed of the melt * adhesive film or the melt * adhesive layer and at least one surface film is preferably a co-extruded film *

According to a preferred embodiment, the film is manufactured using a subsequent treatment and cooling of the cooling rolling process.

The polyolefin * combination film composed of melt * adhesive film or melt * adhesive layer and at least one surface * film has an elastic modulus of less than 10 ^ kp / cm 2, preferably lower 10 ^ kp / cm 2 and a Shore D hardness less than 65, preferably less than 50.

In a preferred embodiment, the poly * olefin * combination film is formed together with the carton.

As an inorganic filler or as an inorganic filler mixture, chalk, talc, silicon dioxide or glass spheres are present in the melt * adhesive film or melt * adhesive layer and / or surface layer, the average grain size of the filler being less than 40 µm, preferably less than 8302706 6 20 ym.

The invention furthermore relates to a method for the manufacture of cardboard, which is provided with a polyolefin film, wherein the film resp. films are applied to at least one side of the cardboard, or the cardboard 5 completely enveloped, preferably completely enveloped with a strip-shaped overlap.

According to the method of the invention for the manufacture of the cardboard, which is provided with a polyolefin foil, an at least two-layered polyolefin combination foil is covered completely on one side of the cardboard, with at least one strip-shaped or catheter-shaped overlapping the cardboard on the other side, and preferably covered with a second polyolefin * combination foil under strip * or frame-shaped overlapping of the first polyolefin * combination foil on the other side of the cardboard.

Thereby, a polyolefin * combination film of (1.) composed of at least two layers is a melt * adhesive film or melt * adhesive layer, consisting of (1.1) an olefin homogene *, * copolymer or olefin homogene *, respectively. * co * polymer mixture, which in total (based on the total plastic mixture for the melt * adhesive film) 33 * 5 wt.%, preferably 30 * 7 wt.%, of a 20 polar monomer or polar monomer mixture in the form of the solid or liquid monomeric or copolymerized compounds, preferably as polar comonomer (s), with (1.2) a melting point or. melting range of 50 * 95 ° C, preferably 60 * 90 ° C, (2.) at least one surface foil, consisting of (2.1) an olefin homogen *, olefin copolymer, a polar group-containing olefin copolymer or an olefin homogen *, respectively. olefin copolymer mixture, which (2.2) has a melting point resp. melting range above 100 ° C, preferably above 105 ° C, (2.3) has a melt index (190 / 2.16) of less than 10 g / 10 min., on a (3.) carton without simultaneous application of an adhesive layer immediately bonded with the melt adhesive film or the hotmelt adhesive layer. The application resp. gluing takes place (4.) at temperatures of 50 * 95 ° C, preferably 70 * 90 ° C under the action of pressure. The polyolefin combination foil with the melt adhesive film or melt adhesive layer is immediately adhered to the cardboard without simultaneous application of an adhesive layer.

* 35 According to a preferred embodiment of the method, the cardboard is cut to the desired size and a poly * v olefin * combination film of larger dimensions than that of the cardboard is completely covered on one side of the cardboard applying at least one free edge strip of the polyolefin * combination film * 40 and then wrapped around the cardboard, so that the polyolefin combination * 8302706 / native film strips the cardboard on the other side * or frame overlap *, preferably completely envelop the cardboard with a second polyolefin * combination film under strip * or frame-shaped overlap of the first polyolefin * combination * film.

After the desired, e.g. rectangular or square, format has been prepared, the cardboard is either directly fed to further processing or stacked and / or stored in a warehouse. The polyolefin combination film is preferably cut to the desired dimensions in the bookbinding machine while unwinding a roller. The folding of the free polyolefin * combination edge * strip projecting outside the cardboard takes place by mechanical devices or methods, preferably using brushes. The gluing preferably takes place by means of shaped plates and / or rollers. When pressing by means of plates, the pressing pressure is 0.3 * 5 kp / cm., 15 when gluing with the roller the line pressure is 3 * 30 kp / cm. The operating time of the heat is set to 0.5 * 5 s (= seconds). Additional measures for fixing the formation are not necessary in the method according to the invention. The cardboard has a thickness of 0.5 * 5 mm, preferably 1 * 3 mm.

According to a preferred method, (4.1.3) the heat is deposited by permanently heated plates or rollers on the layers to be joined, respectively. films transferred. These plates or rolls form the assembly without additional measures for fixing the formation being applied.

25

Example I

Co-extruded film, the top film of polypropylene (ELTEX PKS 404 * registered trademark of Solvay & Cie) and the bottom film of a polar group-containing olefin copolymer mixture containing 9% by weight of a mixture of a high molecular weight acrylic ester and a polyethylene *. state. The thickness of the top foil is 120 µm and that of the adhesive film 30 µm.

Bond temperature: 90 ° C

Weld seam strength: 6 N / 15 mm 35 Bonding time: 3 s

Adhesion to cardboard: not separable; delamination of the cardboard under increased stress during the tensile test.

8302706 w W *>

Example II

Polyolefin-based coextruded film, the top film consisting of high-pressure polyethylene (LDPE 1018 from BASF) and the bottom film consisting of a polar group-containing copolymer of ethylene with ethylene-vinyl acetate (EVA content 30% by weight).

Bond temperature: 90 ° C

Weld seam strength: 2.5 N / 15 mm

Pastes! Jd: 3 s

Adhesion to cardboard: tearing of the cardboard under increased load during the tensile test.

Example III

Top film of a linear high-pressure polyethylene (low-density linear polyethylene), bottom film mixture of a polar groups contains a copolymer blend of ethylene with ethylene * vinyl acetate, consisting of 50 parts by weight with a vinyl acetate content of 20% by weight and 50% by weight. parts with a vinyl acetate content of 30% by weight.

Bond temperature 88 ° C

Weld seam strength: 1.2 N / 15 mm 20 Bonding time: 3.5 s

Adhesion to cardboard: Partial tearing of the cardboard under increased stress during the tensile test.

Example IV

Top film 50 parts by weight of high pressure linear polyethylene and 50 parts by weight of a polar group containing ethylene copolymer with an ethylene-vinyl * acetate content of 30% by weight and the bottom film 100 parts of a polar group containing ethylene copolymer with an ethylene-vinyl acetate content of 30% by weight.

Bond temperature: 92 ° C

Weld seam strength: 3.2 N / 15 mm

Bonding time: 2.8 s

Adhesion to paper: Tearing of the cardboard under increased load in the tensile test.

Examples V * VIII

Top foil according to the examples 1 * 4. In addition, the plastic resp. the plastic mixture of the bottom foil added 0.5 * 3% by weight of fillers as an anti-blocking agent. At a bonding time of 3 s 40 and a bonding temperature of 90 ° C, strengths of 2.5 * 3.5 N / 15 mm were measured. In all the adhesion tests, a tear-out of the cardboard occurred under increased stress in the tensile test.

Examples IX-XII

5 Under foil according to the examples 1 * 4 (also 5 * 8). In addition, 0.5 * 3% by weight of fillers are added to the top film as an anti-blocking agent. These correspond to the corresponding examples 1 * 4 (without filler additive) resp. the examples 5 * 8.

Example XIII

The bottom film according to example 2. The top film as example 2, but additionally 7 parts by weight of EPDM (terpolymer of ethylene, propylene and a diene with an unsaturated part of the diene in the side chain) to increase the gloss of the film. set.

15 Bond temperature: 87 ° C

Bonding time: 2 s

Adhesion to Cardboard: Partially delaminating the cardboard when examining the adhesion.

20

Example XIV

Co-extruded film, the top film of high-pressure polyethylene and the bottom film of a mixture of 60 parts by weight of linear high-pressure polyethylene and 40 parts of a polar group containing ethylene-vinyl * acetate * copolymer with a vinyl acetate content of 60% by weight. % exists.

Hardness: 48 Shore D.

Bond temperature: 94 ° C

Bonding time: 2.5 s

Adhesion to cardboard: Tearing of the cardboard at increased load in the tensile test.

Description of the drawing

The accompanying drawing schematically shows a cardboard provided with a polyolefin layer for binders, ring binders or similar organization * and office needs.

The numeral 1 denotes the melt * adhesive foil as the bottom foil, which together with the surface foil (2) is manufactured according to the coextrusion process. The cardboard (3) cut to the desired size is surrounded by the combination foil consisting of the melt * adhesive foil (1) and the top foil (2) such that a polyal * 40 keen * combination foil is placed on the bottom side of the carton (3). with dimensions larger than that of the cardboard under 8302706 10% the adherence of at least one free edge strip of the polyolefin combination film is applied and then wrapped around the cardboard, so that the polyolefin combination film covers the cardboard on the top of a strip1 or frame overlap (4). In a preferred embodiment, a second polyolefin combination foil is applied to the top of the carton under strip 1 or frame overlapping (5) of the first polyolefin combination foil overlap.

8302706 i

Claims (22)

1. Cardboard provided with a polyolefin coating, preferably for binders, ring binders and other organizational and office needs, which is provided on at least one surface with two superimposed thin layers of an olefin resin material, each layer having a different density, characterized in that the polyolefin coating consists of a polyolefin combination film built up of at least two layers, which is applied on at least one side of the cardboard or which covers one side of the cardboard completely with at least one strip-shaped or surrounds the cardboard overlap on the other side, preferably with a second polyolefin combination film under strip or frame overlap of the first polyolefin combination film, completely envelopes the cardboard, »and the polyolefin combination film from 1. a melt adhesive foil as bottom foil, consisting of 1.1 an olefin homopolymer or olefin homopolymer or. copolymer mixture, which in total (based on the total plastic mixture for the hot-melt adhesive film) 33-5 wt.%, preferably 30-7 wt.%, of a 20 polar monomer or polar monomer mixture in the form of the solid or liquid monomeric or copolymerized compound (s), preferably as polar comonomer (s), with 1.2 melting point resp. melting range of 50-95 ° C, preferably 60-90 ° C, 1.3 a density greater than the density of the top foil and 1.4 a melt index 190 / 2.16 less than 10 g / 10 min., and 2 at least one surface film consisting of 2.1 an olefin homo, olefin copolymer, a polar group-containing olefin copolymer or an olefin homopolymer, respectively. olefin copolymer mixture, which has 2.2 melting point resp. melting range above 100 ° C, preferably above 105 ° C, 2.3 has a melt index 190 / 2.16 less than 10 g / 10 min., 2.4 a hardness less than 65 Shore D, preferably less than 50 Shore D, and 35 2.5 has a density of 0.89-0.93 g / cm 2, preferably 0.90-0.926 g / cm 2, is composed, 3. the carton immediately melts without simultaneously applying an adhesive layer adhesive film or melt-adhesive layer is in a compound and has 8302706 3.1 a thickness of 0.3 * 5 mm, preferably 1 * 3 mm. Cardboard provided with a polyolefin film according to claim 1, characterized in that the polyolefin * combination * 5 film composed of the melt * adhesive film or melt * adhesive layer (1) and at least one surface film (2) has a thickness of 50 * 400 pm, preferably 80 * 300 pm. Cardboard provided with polyolefin film according to Claims 1 and 2, characterized in that the melt-adhesive film resp. the melt adhesive layer 1.4 has a thickness of 5 * 50 µm, preferably 10 * 30 µm. 4. Polyolefin-coated cardboard according to claims 1 * 3, characterized in that the polar group-containing olefin copolymer or olefin copolymer mixture consists of 1.1.1 at least one ethylene * and / or propylene copolymer and comprises a total of 33 * 5% by weight, preferably 30 * 7% by weight, of a polar monomer or a polar monomer mixture as comono * 15 mer (comonomers) or when polar units are present in the total plastic mixture for the melt adhesive films. 5. Polyolefin-coated cardboard according to one or more of claims 1 * 3, characterized in that the polar group-containing olefin copolymer mixture of 1.1.2 contains a non-polar group containing ethylene * and / or propylene homogeneous * and / or copolymer or an olefin copolymer containing polar groups, preferably ethylene copolymer containing polar groups, is prepared by copolymerizing with 10 * 70 wt.%, preferably 25 * 60 wt.% of a polar monomer or polar monomer mixture, with provided that a total of 33 * 5 wt.%, preferably 30 * 7 wt.%, of a polar monomer or of a polar monomer mixture as a comonomer (s) or as polar units in the total plastic mixture for the melt * adhesive foils are present. Polyolefin-coated cardboard according to one or more of claims 1 * 5, characterized in that 1.1.3 the melt index (190 / 2.16) of the polyolefin copolymerized with one or more polar monomers and / or the mixture of polyolefins and olefin copolymers with polar monomers of the melt adhesive film is less than 10 g / 10 min, preferably less than 8 g / 10 min. Cardboard provided with polyolefin film according to one or more of claims 1 * 6, characterized in that the melt-adhesive film resp. melt * adhesive layer additionally 40 1.1.4 contains an inorganic filler or an inorganic filler mixture (as 8302706 anti * blocking agent). The polyolefin-coated cardboard according to one or more of claims 1 * 7, characterized in that the surface film 2.1.2 contains an inorganic filler or an inorganic filler mixture. Polyolefin film-coated cardboard according to one or more of claims 1 * 8, characterized in that the surface film 2.1.3 consists of polyethylene, polypropylene, the copolymers or mixtures thereof with a * olefin polymers, whose modulus of elasticity is less than 10 10 ^ kp / cm ^, preferably less than 10 ^ kp / cm? and its Shore D * hardness is less than 65, preferably less than 50. Polyolefin film-coated cardboard according to one or more of claims 1 * 9, characterized in that the polyolefin * combination of oil composed of the melt * adhesive film or the melt * adhesive layer and at least one surface film is a coextruded film is. Polyolefin film-supplied cardboard according to one or more of claims 1 * 10, characterized in that the coextruded film is manufactured according to the flat film process, preferably under a subsequent cooling 20 according to the cooling-rolling process. Polyolefin film-coated cardboard according to one or more of Claims 1 * 11, characterized in that the polyolefin * composite film composed of the melt * adhesive film or melt * adhesive layer and at least one surface foil has a modulus of elasticity lower than 10 ^ kp / cm 2, preferably less than 10 ^ kp / cm 2 and has a hardness less than 65 Shore D, preferably less than 50 Shore D. Polyolefin foil-backed cardboard according to one or more of claims 1 * 12, characterized in that the polyolefin * combination film is formed, preferably formed together with the cardboard. Polyolefin film-coated cardboard according to one or more of claims 1 * 13, characterized in that as an inorganic filler or filler mixture chalk, talc, silicon dioxide or glass spheres in the melt * adhesive film or the melt * adhesive layer and / or the surface film are present, the average grain size of the filler being less than 40 µm, preferably less than 20 µm. 15. Method for the production of cardboard provided with a polyolefin film, wherein the film is applied on at least one side of the cardboard, characterized in that a polyolefin * combination film, which is built up at least in two layers, is filled on one side of the cardboard. * Covering 40 digits, with at least one strip-shaped or frame-shaped overlap * 8302706 pinging of the cardboard is applied on the other side and preferably with a second polyolefin combination film, under strip * or frame-shaped overlap of the first polyolefin combination film on the other side of the cardboard is covered, that the polyolefin combination film consists of 5 1. a melt-adhesive film or melt-adhesive layer, consisting of 1.1. an olefin homopolymer or olefin homopolymer, respectively. copolymer mixture, which in total (based on the total plastic mixture for the hot-melt adhesive film) 33-5 wt.%, preferably 30-7 wt.% of a polar monomer or polar monomer mixture in the form of solid or liquid monomeric or copolymerized compounds, preferably as polar comonomer (s), with 1.2 melting point resp. melting range of 50-95 ° C, preferably of 60-90 ° C, and 2. at least one surface foil consisting of 2.1 an olefin homo- or olefin copolymer, which 2.2 has a melting point resp. melting range above 100 ° C, preferably above 105 ° C, 2.3 has a melt index 190 / 2.16 less than 10 g / 10 min., wherein the polyolefin combination film with the melting film layer on the carton 3. without simultaneous application of an adhesive layer is immediately pasted and 3.1 the carton has a thickness of 0.5-5 mm, preferably 1-3 mm, 4. the application and treatment process by 4.1 sticking together at temperatures of 50-95 ° C. , preferably 70-90 ° C, as well as 4.2 under pressure. 16. A process for preparing a polyolefin-foil cardboard, wherein the film is applied on at least one side of the cardboard or cardboard completely enveloped, preferably completely enveloped with a strip-shaped overlap, according to claims 15, characterized in that the polyolefin combination film is produced by the coextrusion process and is then applied to the cardboard. Method for the manufacture of a cardboard provided with a polyolefin film 35 according to claim 15 and / or 16, characterized in that 4.1.1. the laminating takes place by means of shaped plates and / or rollers. Method according to one or more of Claims 15-17, characterized in that the pressure of 0.3-4 8302706 <15 kp / cm 2 when pressing by means of plates, when gluing with rollers the linear pressure is 3 * 20 kp / cm. 19. Method according to one or more of claims 15-18, characterized in that 4.1.2. the action time of the heat is 0.5-5 s («seconds). Method according to one or more of claims 15-19, characterized in that 4.1.3. the heat by permanently heated plates or rollers on the layers to be joined resp. foils are transferred. Method according to claim 20, characterized in that these plates or rollers form the assembly, without additional measures for fixing the molded being being applied. 22. Method according to one or more of claims 15-21, characterized in that the cardboard is cut to the desired size and a poly-15 olefin combination foil of larger dimensions than that of the cardboard on one side of the completely covering the cardboard while maintaining at least one free edge strip of the polyolefin combination film and then wrapped around the cardboard, so that the polyolefin combination film overlaps the cardboard on the other side with strip or frame shape, preferably with a second polyolefin combination film enclosing the carton completely under strip or frame overlapping of the first polyolefin combination film. ****** 8302706