DE3914328A1 - Cardboard-plastic system for files, ring-binders, etc. - has cardboard blank with coat, sheath or pocket of 3-layer co-extruded plastic pref. joined by HF-welding - Google Patents

Abstract

A cardboard blank (I) is provided, with enclosed in or coated with co-extruded unoriented plastic film (strip) on both sides and/or has a plastic film pocket bonded to it, pref. for files.; the film (II) contains a polyolefin, pref. PE and is opt bonded to (I) with a layer of hot melt adhesive or adhesive; the novelty is that (II) consists of at least 3-layer laminated film, comprising upper (A) and lower layer (C) of PE, pref.

Description

The present invention relates to one with mind at least one co-extruded and not oriented Plastic film or plastic film sheet on both sides provided, enclosed or coated cardboard cut, preferably for folders, ring binders and others re organizational and office supplies, the Plastic film or a plastic film fin, preferably polyethylene, contains and is given if with the cardboard blank over a melt custody layer or adhesive layer is connected, and a method of making the same. The art Stoffolie or the plastic sheet consists of an at least three-layer composite film or Composite film web of certain composition, the one has improved weldability.

DE-OS 29 34 850 is already a composite film consisting of at least one carrier layer and one High-frequency weldable top layer from a copo lymerisate from 70 to 90 mol% of ethylene units and 10 up to 30 mol% of vinyl acetate units are known, where as Carrier layer is a layer of polyolefin, polyester or polyamide can be used. The used Unfortunately, layers are peelable, so that a Delamination of the layers occurs easily. The Be The edges of the composite film can therefore also according to  corresponding embodiment in the patent application only permanently welded by heat sealing will. Only the bag opening is high frequency welds with the aim of a peelable closure the bag opening. Such composite films are suitable for peelable, sealed bags suitable, but they are not suitable around film edges to ver permanently with each other in the high frequency process welding. There are also disadvantages of these Composite films for a coating of cardboard cut.

DE-OS 33 24 830 already discloses a cardboard provided with a polyolefin coating, preferably for files, ring binders and other organizational and office supplies, which is provided on at least one surface with two superimposed thin layers of an olefin resin material. The polyolefin coating consists of an at least two-layer polyolefin combination foil, which is placed on at least one side of the cardboard or which completely covers one side of the cardboard with at least one strip-like or frame-shaped overlap of the cardboard on the other side. The polyolefin combination film consists of a hotmelt adhesive film as the lower film, consisting of an olefin homopolymer or copolymer or an olefin homopolymer or copolymer mixture which in total (based on the total plastic mixture for the melt adhesive film) is 33 to 5% by weight, preferably 30 contains up to 7% by weight of a polar monomer or polar monomer mixture in the form of the solid or liquid monomeric or copolymerized compound (s), with a melting point or melting range of 50 to 95 ° C., preferably 60 to 90 ° C., and a density which is greater than the density of the top film and a melt index 190 / 2.16 less than 10 g / 10 min. It also contains a surface film consisting of an olefin homo-, olefin copolymer, a polar group-containing olefin copolymer or an olefin homo- or olefin copolymer mixture which has a melting point or melting range of greater than 100 ° C., preferably greater than 105 ° C., egg a melt index of 190 / 2.16 less than 10 g / 10 min, a hardness of less than 65 Shore D, preferably less than 50 Shore D, and a density of 0.89-0.93 g / cm ³ , preferably 0, 90-0.926 g / cm ³ . The cardboard is bonded directly to the hotmelt adhesive film or hotmelt adhesive layer without the use of an adhesive layer. This film is very well suited for folders, ring binders and other organizational and office materials, but has the disadvantage, among other things, that high-frequency weld seam welding of the polyolefin film is not possible and therefore the film is folded over to form a strip or frame-shaped overlap the foils are required.

The aim and object of the present invention was to to avoid the aforementioned disadvantages and a ver improved, with a plastic film or plastic olienbahn provided on both sides, enclosed or to get coated cardboard blank. The the Cardboard blank surrounding plastic film should in particular special high frequency ver weldable, not or difficult to peel or delami nable, easy to process and for cardboard wrappings or coatings well suited, preferably for  Folders, ring binders and other organizational and office need be used.

According to the invention, it was found that these goals and tasks one with at least one coextruded and non-oriented plastic film or plastic olienbahn provided on both sides, enclosed or coated cardboard blank and / or attached to it or welded-on plastic film bag being, the plastic film or plastic films a polyolefin, preferably polyethylene, contains, the cardboard blank surrounds and / or given otherwise, cut the cardboard over a melt adhesive layer or adhesive layer. According to the invention, the plastic film or the plastic film web of at least three layered composite film or composite film web, from the top film or top layer and the bottom film or underlayer made of polyethylene, preferably LDPE or LLDPE, or this is in addition to processing auxiliaries, additives, fillers and / or pigments contains and / or these as the main component and polar Group containing polymers containing polar groups from 0.1 to 9.9% by weight (based on 100 parts by weight of the top and / or bottom film) contains and the middle film or middle layer made of ethylene-Vi nyl acetate copolymer, ethylene vinyl acetate carbon mon oxide terpolymer, polyamide, chlorinated polyethylene len, modified ethylene-propylene-diene polymer, Ethylene-acrylic acid copolymer or terpolymer, ethylene Acrylic acid ester copolymer or terpolymer, maleic acid reanhydride terpolymer and / or cellulose acetobuty rat exists or one or more of these polymers in addition to processing aids, additives, fillers and / or pigments. The plastic film or  Plastic sheeting shows the cardboard blanks or survive the sheet-like cellulose substrate the edges a weld, preferably a high frequency weld, on. The use of the invention according to coated or enclosed cardboards cut is preferably done for folders, ring binders and other organizational and office supplies.

According to a preferred embodiment, the Middle film or middle layer made of ethylene vinyllace tat copolymer, ethylene-vinyl acetate-carbon monoxide Terpolymer, polyamide, chlorinated polyethylene, modified ethylene-propylene-diene polymer, Ethy len-acrylic acid co- or terpolymer and / or ethyl len-acrylic acid ester co- and / or methacrylic acid co- or terpolymer or ethylene-methacrylic acid ester copolymer or terpolymer, maleic acid drid co- or terpolymer and / or cellulose aceto butyrate or contains one or more of these polymers re or contains these in addition to processing auxiliaries, additives, fillers and / or pigments. The cardboard blank is polygonal, preferably square, rectangular or square. The art Fabric sheet is up to the cardboard cut protruding by a maximum of 8 mm, preferably up to max times 4 mm protruding, film edges with a high frequency weld seam provided, the thickness of the Un film or underlayer (added to the cardboard blank facing layer) less than 65%, preferably 2-45%, the thickness of the middle film or middle layer wearing.

According to a further preferred embodiment the at least three-layer composite film that the  Cardboard blank encloses a top sheet or top layer whose thickness is less than 65%, preferably example, 2-45%, the thickness of the middle layer. This top layer or top film is made of polyethylene len low density (LLDPE or LDPE) or contains this in addition to processing aids, additives, filling substances and / or pigments. The at least three layers term plastic film is after an execution form directly or via a melt adhesive layer or Adhesive layer in connection with the cardboard blank or surrounds it without adhesive or sticky Connection.

According to a preferred embodiment, the rectangular cardboard blank or the rectangular cardboard by at least two grooved and / or groove-shaped elevations and / or depressions or folds as fold lines or in at least three rectangular cardboard cutting fields for folders back, front and back covers divided and over the entire surface of two identical or different, at least three-layer composite film webs, the The bottom layer or bottom film of the cardboard blank indirectly or via a melt adhesive layer or adhesive coated, surrounded by art Sheets of fabric over the cardboard cut up to 0.1 up to 8 mm, preferably 0.5 to 4 mm, protruding Fo line edges with a high-frequency weld, preferred wise high-frequency weld in separation welding processes manufactured, have.

According to a further preferred embodiment at least three next to each other at a distance from 0.2 mm to 15 mm, preferably 0.5 mm to 8 mm,  arranged, rectangular cardboard cuts, best from a rectangular folder spine cardboard cut and each a rectangular front and Back cover cardboard blank, all over two same or different, at least three layered composite film webs, the lower layer or bottom film the cardboard blanks immediately or supplied over a melt adhesive layer or adhesive layer is surrounded, with the plastic film over the outer edges of the cardboard blank 0.1 to 8 mm, preferably 0.5 to 4 mm, protruding plastic Foil sheet edges with a high-frequency weld seam having.

The thickness of the middle film or middle layer is 30-500 µm, preferably 40-350 µm.

According to a further preferred embodiment be carries the thickness of the bottom film or bottom layer and / or the top film or top layer 10-225 µm sometimes 15-100 µm.

The invention further relates to a method for Production of both sides with at least one art or plastic film or plastic film coated cardboard blanks, preferably for Ord ner, ring binders and other organizational and office work may means, the plastic film or plastic olienbahn a polyolefin, preferably polyethylene contains and if necessary with the cardboard blank directly or via a melt adhesive layer or with egg an adhesive is connected. According to the fiction The process is called plastic film or art Fabric sheeting has at least three layers  Composite film or film sheet used, in which the top film or top layer and the bottom film or Lower layer made of polyethylene, preferably LDPE or LLDPE, exist or this in addition to processing aids, Additives, fillers and / or pigments and / or this as the main component and polar group ting polymers containing polar groups of 0.1 to 9.9% by weight (based on 100 parts by weight of the Top and / or bottom film) included and the middle film lie or middle layer made of ethylene-vinyl acetate copoly merisat, ethylene vinyl acetate carbon monoxide terpolyme risat, polyamide, chlorinated polyethylene, modified system ethylene-propylene-diene polymer, ethylene-acrylic acid copolymer or terpolymer, ethylene acrylic acid ester copolymer or terpolymer and / or ethylene metha acrylic acid copolymer or terpolymer or ethylene metha crylic acid ester copolymer or terpolymer, maleic acid reanhydride terpolymer and / or cellulose acetobuty rat exists or one or more of these polymers in addition to processing aids, additives, fillers and / or pigments, each one of these Plastic films, plastic film sheets or correspond appropriate plastic film cuts of the same or different composition separately to the front and fed back surface of the cardboard blank the front and back surface of the cardboard blank brought and the plastic sheeting, plastic sheeting NEN or plastic film sheeting to the Cardboard cut out or protrude the flat substrate the outer edges in the high-frequency welding process are welded together.

The high-frequency separation seam welding on the over the Cardboard cuts protruding outer walls  preferably in such a way that material-welded seams thin spots or lines appear over which the Fo lien waste grid with the plastic article first still communicating, the 3-25%, preferably 4-20%, the total thickness of the surface lying on top of each other the plastic films, sheets and / or cuts wear.

The lower layers or lower films of the composite films tracks are ent according to the inventive method neither directly facing the cardboard blank or are in with an adhesive or adhesive layer Connection. The top sheets or top layers are preferably the outer layers. After another preferred embodiment contain the top films or top layers of pigments, color pigments and / or Fillers or have a on their outer surface Printing layer, preferably colored printing layer and / or an additional surface protective layer.

According to a preferred embodiment of the Invention The process is considered to be at least three-layered Composite foil is a composite foil or a composite foil cut used, the or a top film or Upper layer, the thickness of which is less than 65%, preferably 2-45%, the thickness of the middle layer or The middle film is made of polyethylene or low density (LLDPE or LDPE) in addition to processing aids, additives, fillers and / or pigments and / or these as the main component and polar group-containing polymers with a Ge holds in polar groups from 0.1 to 9.9% by weight (based on 100 parts by weight of the top and / or bottom film) contains and their middle film or middle layer  Ethylene-vinyl acetate copolymer, ethylene-vinyllace Tat carbon monoxide terpolymer, polyamide, chlorinated polyethylene, modified ethylene propylene diene Polymer, ethylene-acrylic acid co- or terpolymer sat or ethylene acrylic acid ester co or terpolyme risat and / or ethlene methacrylic acid co or tempo lymerisat or ethylene-methacrylic acid ester or -Terpolymerisat, maleic anhydride terpolymer and / or cellulose acetobutyrate, or one or contains several of these polymers or additionally Processing aids, additives, fillers and / or contains pigments. The composite film webs or Composite film sheets are cut to the front and fed back surfaces of the cardboard blanks that polygonal, preferably square, rectangular or are square on the front and back surfaces of the Cardboard blanks applied across the board. Below who the plastic sheet or plastic sheet cut to the cardboard cut up to maxi protruding by 8 mm, preferably up to a maximum of 4 mm protruding, film edges with a high fre provided with a cross weld, preferably on the over standing outer edges in high-frequency welding seam process welded together.

According to a preferred embodiment of the method according to the invention, the rectangular cardboard blanks, consisting of a rectangular folder cut back, a rectangular front and a back cover cardboard blank, next to one another at a distance of
0.2 mm to 15 mm, preferably
0.5 mm to 8 mm,
arranged and surrounded over the entire surface by two identical or different, at least three-layer composite film webs on their front and back surfaces, the lower layer or lower film of which directly surround the cardboard cuts, or whose lower layer or lower film is sealed or sealed with the cardboard cuts directly or via a melt adhesive layer or adhesive layer be, the plastic films overlap over the outer edges of the cardboard blank and at a distance from the outer edge of the cardboard blank of
0.1 mm to 8 mm, preferably
0.5 mm to 4 mm,
high-frequency separating seams are welded together.

At least three each next to each other at a distance of
0.2 mm to 15 mm, preferably
0.5 mm to 8 mm,
Arranged, rectangular cardboard blanks, consisting of a rectangular file spine cardboard cut, a rectangular front and back cover flap cardboard blank, are thus surrounded over the entire area by two identical or different, at least three layered composite film webs, the lower layer or lower film of which directly surround the cardboard cuts or their lower layer or Bottom film with the cardboard blanks are sealed or glued directly or via a melt adhesive layer or adhesive layer, at the same time, preferably subsequently, the plastic film webs or plastic film web blanks projecting beyond the outer edges of the cardboard are cut at a distance from the edge of the cardboard blank
0.1 mm to 8 mm, preferably
0.5 mm to 4 mm,
high-frequency welded seams and the film web parts, film web fields or film web lines lying between the spaced, rectangular cardboards cut by at least one high-frequency weld seam or high-frequency decorative seam connected by including the cardboard blanks.

According to another preferred embodiment Composite film webs or composite film web cuts used, the middle film thickness or middle layer thickness is 30-500 µm, preferably 40-350 µm, while the thickness of the bottom sheet or bottom layer and / or top film or top layer 10-225 µm, before preferably 15-100 microns. The plastic composite film webs or plastic film cuts, as previously stated, on the front and back surfaces of three each next to each other at a distance of one other arranged cardboard blanks consisting of Front cover, folder spine and back cover, applied and at a distance from the cardboard cut outer edge in high-frequency separating weld drive so welded that the seams welded, thinned areas or lines over the Fo lien grid with the Pap are still connected, the thinned places, lines and the like after the  preferred embodiment a smaller thickness than 15%, preferably less than 10%, of the total thickness the (two) plastic sheeting or plastic have blanks. The the high frequency Foil grids protruding from the weld seam are replaced separated, at the same time, before or after following that between the cardboard blanks parts of film web, film web fields or film web lines in the high-frequency welding process with each other be welded.

According to a preferred embodiment of the Invention According to the process, plastic composite films are used NEN or plastic film cuts of the fo lien compositions prepared and on the front and back surface of three side by side in one Cardboard blanks spaced apart, consisting of front cover, folder spine and Back cover, applied. The plastic film rail or the plastic film sheet blanks subsequently at a distance from the cardboard blank outer edges (protruding) from 0.1 to 8 mm, preferred as 0.5 to 4 mm, with a high-frequency separation Provide welded seam and welded so that the doors seam-welded, material-thinned areas or Lines across the foil grid with that of the foils covered cardboard blank still in verbin dung, the thinned areas, Lines and the like. Thickness less than 25% preferably less than 15%, and particularly preferred less than 10%, the total thickness of the (both) art fabric sheets or plastic sheet blanks point. Between the cardboard blanks were the the film webs or film web cuts  welded together. The over the high frequency welding grid protruding from the weld seam, film re Ste and the like are subsequently separated.

According to a further preferred embodiment ent holds at least one layer or film at least an inorganic or organic filler or a filler mixture in amounts by weight from 0 to 50 % By weight (expediently 0.3 to 50% by weight), preferably 1 up to 40 wt .-%, based on 100 parts by weight of the in the respective film layer containing polymers, or related to the film layer itself. As anorga African fillers are preferred calcium carbonate, Talc, silicon dioxide, clays, magnesium oxide and the like used in finely divided form. The inorganic Fillers or filler mixtures are in one average particle size below 10 microns, preferably with an average particle size less than 1 micron used.

As an inorganic chemical filler or filler Mixtures are preferably starch and cellulose, especially special cellulose fibers used. The single ones Plastic layers may contain additional processing aids, modifiers, Pigments, dyes and / or flame retardants.

According to a further preferred embodiment at least one layer or film layer is a blowing agent medium or blowing agent mixture in weight amounts of 0.1 to 6.5% by weight, preferably 0.3 to 5.5% by weight, based on the respective layer or polymer halt or polymer and filler content of the respective Layer. The blowing agent is preferred processing or thermoforming of the plastic  mix to plastic film or plastic film web added so that in the respective layer or Fo a certain amount, preferably in coextrusion Degree of foaming achieved and a lowering of you te of 1 to 30%, preferably 5 to 25% becomes.

According to a further preferred embodiment the top layer or top film and / or the bottom layer or bottom film or the entire composite film structured or shaped. This additional procedure ren gives the composite films an attractive appearance path, furthermore a reduction in the contact area che in the roll or in the stack and thus a smaller one Block.

According to a further embodiment, in at least one film layer peroxidic or EHS-ver wetting agents in amounts by weight from 0.05 to 4 % By weight, preferably 0.1 to 3% by weight, is used. These agents increase the amount of heat stability without significantly influencing the hardness of the Film layer.

According to a further preferred embodiment be stands the plastic film or the plastic film web from an at least three-layer composite film or Composite film web from which the top film or top layer and the bottom film or bottom layer made of poly ethylene, preferably LDPE or LLDPE, exists or this in addition to processing aids, additives, filling contains substances and / or pigments and / or these as Main component in 90.5 wt .-% to 99.5 wt .-% and polymers containing polar group containing  the polymers containing polar groups from 0.5 to 9.5% by weight (based on 100 parts by weight of the upper and / or bottom film) contains.

Examples:

According to the method of the invention Plastic composite film webs or plastic films sections of the films mentioned in the examples Made seating and on the front and back area of three next to each other at a distance of cardboard blanks arranged 3.5 mm apart, consisting of front cover, folder spine and Back cover, applied. The plastic film web or the plastic film sheet cuts were made in one Distance from the cardboard blank outer edge (protruding) of 2 mm with a high-frequency separating weld provided and welded that the parting seam welding thinned areas or lines over the Foil grid with the one enclosed by the foil webs cardboard blanks are still connected, whereby the thinned places, lines and the like thickness less than 15%, preferably less than 10%, the total thickness of the (two) plastic films exhibit. Between the cardboard blanks the two foil webs welded together (in high frequency welding process). The the high frequency separator Foil grids protruding from the weld seam were replaced separated.

Example 1:

A 280 μm thick, three-layer coextrusion was carried out te, non-oriented composite film and used, consisting of a 220 µm thick medium layer of polyamide and a 30 µm thick polyethylene layer (LDPE) as a double-sided top layer (i.e.  Upper and lower layer).

The upper and lower layers thus had the same Composition.

Two of the three-layer film webs or films web cuts were made after application of the same up or under the cardboard blanks up together frequency welded. There were flawless highs frequency separating welds with industrially acceptable attainable cycle times.

Example 2:

A three-layer film consisting of a 260 µm dic ken ethylene-vinyl acetate copolymer layer (with egg vinyl acetate content of 28% by weight) and with two Au Outer layers of polyethylene (LDPE) with a layer thickness 40 µm each was coextruded. The so obtained Composites were made according to the above description after feeding to the cardboard cuts and the like high frequency welded together. It emerged inseparable welds, especially between the inner layers (lower layers) made of Po polyethylene (LDPE), and it worked fine Achieve high frequency separating welds.

Example 3:

It became a co-extruded, non-oriented art fabric film, consisting of a middle layer of Ethy len-vinyl acetate copolymer (with 28 wt.% Vinylace factual content), each with two outer layers (top and sub-layer) in a layer thickness of 40 microns contain filler-containing polyethylene. The fill  fabric of the outer layers (upper and lower layers) 10% by weight. They contained finely divided fillers (Krei de, which is in the form of a batch during manufacture were given. The slides were then like described above, high frequency welded. The foil had a dry grip. There was one good welding of the inner LDPE layers (Sub-layers) with each other, as well as good ones Make high-frequency separating welds.  

Drawing description:

In the accompanying drawing is a preferred off embodiment of the coated or cardboard blank surrounded by the plastic film web shown schematically.

The three cardboard cuts ( 1 ), consisting of the front cover, file spine (smaller area) and back cover, are surrounded by the three-layer composite film. The middle layer or middle film ( 3 ) has the greatest layer thickness. Above or below the middle layer or middle film, the top layer ( 8 ) or top film is shown schematically, which has a thinner layer thickness than the middle layer or middle film (not shown in the schematic drawing) and which at the same time preferably represents the outer layer. According to one embodiment, the top layer is also provided with a print and / or lacquer layer and can also be embossed or structured. The bottom film or bottom layer ( 2 ) directly surrounds the cardboard blank (as well as the top and bottom surface of the cardboard blank) or, according to one embodiment, is glued or sealed to the cardboard blank. At the protruding outer edges, the composite films are provided with a separating weld ( 4 ), which represents a high-frequency separating weld. Between the cardboard blanks, the plastic composite films are welded or connected to one another on their lower layers or lower films by a sealing seam ( 5 ) or decorative seam, which is produced in the high-frequency welding process.

In the next to the schematic representation of the schematic section, it is shown that the separating weld seam ( 6 ), produced in the high-frequency separating welding process, can also be arranged on or near the underside of the film or the underside of the cardboard cutout and does not have to lie in the middle of the film. Likewise, the sealing seam ( 7 ) can be arranged in the plane of the bottom film.

In Fig. 2, a seam-welded folder with cardboard insert and welded pocket is shown schematically. The cardboard insert is surrounded by the three-layer film, consisting of top layer or top film, middle layer or middle film and bottom layer or bottom film, the bottom layers or bottom films facing the cardboard insert directly or via an intermediate layer or adhesive layer or in connection therewith stand. On one side of the three-layer film, a pocket is welded onto the upper layer or upper film, which is preferably three-layer and is preferably welded or welded to the upper film of the three-layer films surrounding the cardboard blank with the lower layer or lower film.

Claims (13)

1. With at least one co-extruded and non-oriented plastic film or plastic film web on both sides, enclosed or coated cardboard blank and / or on or welded on plastic film bag, preferably for folders, ring binders and other organizational and office supplies, the plastic film or Plastic sheeting contains a polyolefin, preferably polyethylene, and is optionally connected to the cardboard blank via a hot melt adhesive layer or adhesive layer, since it is characterized in that the plastic sheeting or plastic sheeting consists of an at least three-layer composite film or composite film web, of which the top film or top layer and the lower film or lower layer consists of polyethylene, preferably LDPE or LLDPE, or this in addition to processing aids, additives, fillers and / or pigments and / or polyme containing these as the main component and polar group re with a polar group content of 0.1 to 9.9% by weight (based on 100 parts by weight of the top and / or bottom film) and the middle film or middle layer made of ethylene-vinyl acetate copolymer, Vinyl acetate-carbon monoxide terpolymer, sat, polyamide, chlorinated polyethylene, modified ethylene-propylene-diene polymer, ethylene-acrylic acid copolymer or terpolymer, ethylene-acrylic acid ester copolymer or terpolymer, maleic acid hydride terpolymer and / or cellulose acetate butane or contains one or more of these polymers in addition to processing aids, additives, fillers and / or pigments and the plastic film or plastic film web has a weld seam, preferably a high-frequency weld seam, on the edges protruding from the cardboard cuts. 2. Cardboard enclosed by plastic sheeting cut according to claim 1, characterized in that the middle film or middle layer of Ethy len-vinyl acetate copolymer, ethylene-vinyl acetate Carbon monoxide terpolymer, polyamide, chlorinated Polyethylene, modified ethylene-propylene-dienpo polymer, ethylene-acrylic acid co- or terpolymer sat, ethylene-acrylic acid ester co- or terpolymer sat, maleic anhydride terpolymer and / or Cellulose acetobutyrate exists or one or more ere of these polymers contains or additionally Processing aids, additives, fillers and / or pigments that the cardboard blank contains polygonal, preferably square, rectangular or square, and the plastic sheet on the cardboard cut up to a maximum of 8 mm protruding, preferably up to a maximum of 4 mm protruding, film edges with a Hochfre cross weld, preferably on the protruding ones External edges with a high-frequency separating weld is provided, the thickness of the bottom film or Lower layer (facing the cardboard blank Layer) less than 65%, preferably 2-45%, the thickness of the middle film or middle layer wearing. 3. Cardboard enclosed by plastic sheeting Section according to claims 1 and 2, characterized  records that the at least three-layer Ver bund foil has an upper foil or top layer, whose thickness is less than 65%, preferably 2-45% the thickness of the middle layer or middle film and made of low density polyethylene (LLDPE or LDPE) exists or this in addition to Verar processing aids, additives, fillers and / or pigments and / or these as the main ingredient and polar group-containing polymers with a Polar group content of 0.1 to 9.9% by weight (based on 100 parts by weight of the upper and / or Un film) contains. 4. Cardboard enclosed by plastic sheeting Section according to one or more of claims 1 to 3, characterized in that the at least three-layer plastic film directly or over a melt adhesive layer or adhesive layer with the Cardboard blank is connected or this without any adhesive or adhesive connection. 5. Pappenzu enclosed by plastic film webs according to one or more of claims 1 to 4, characterized in that the rectangular cardboard blank or the rectangular cardboard by at least two groove-shaped and / or groove-shaped elevations and / or depressions or folds as fold lines or in at least Three rectangular cardboard cut-out fields for file spine, front and back cover divided and completely surrounded by two identical or different, at least three-layer composite film sheets, the lower layer or lower film of which is cut to the cardboard directly or via a melt adhesive layer or adhesive layer, the plastic film sheets about the cardboard cut up to
0.1 to 8 mm, preferably
0.5 to 4 mm,
have protruding film edges with a high frequency separating weld. 6. Pappenzu enclosed by plastic film webs cut according to one or more of claims 1 to 5, characterized in that in each case at least three next to each other at a distance of
0.2 mm to 15 mm, preferably
0.5 mm to 8 mm,
Arranged, rectangular cardboard blanks, consisting of a rectangular folder spine cardboard blank and a rectangular front and back cover cardboard blank all over the entire area are surrounded by two identical or different, at least three-layer composite film webs, the bottom layer or bottom film of which directly surround the cardboard blanks or their bottom layer or bottom film with the Cardboard cut directly or via a melt adhesive layer or adhesive layer are sealed or glued, the plastic film web over the outer edges of the cardboard blank
0.1 to 8 mm, preferably
0.5 to 4 mm,
has protruding plastic film web edges with a high-frequency separating weld seam and at least one high-frequency weld seam or high-frequency decorative seam is arranged between the rectangularly spaced pap cuts, which connects the plastic film webs arranged on and under the cardboard cuts. 7. Cardboard enclosed by plastic sheeting section according to one or more of claims 1 to 6, characterized in that the thickness of the Mittelfo lie or middle layer 30-500 microns, preferably 40-350 µm. 8. Cardboard enclosed by plastic sheeting section according to one or more of claims 1 to 7, characterized in that the thickness of the subfo lie or underlayer 10-225 µm, preferably 15-100 µm. 9. Process for the production of both sides with mind at least one plastic film or plastic film sheet enclosed or coated cardboard blanks, preferably for folders, ring binders and other documents ganization and office supplies, the Plastic film or plastic film a poly contains olefin, preferably polyethylene and counter if necessary with the cardboard cut over a Melt adhesive layer or bonded with an adhesive which is characterized in that as art at least one plastic film or plastic film three-layer composite film or composite film web is used where the top film or top layer and the bottom film or bottom layer  Polyethylene, preferably LDPE or LLDPE or this in addition to processing aids, additives agents, fillers and / or pigments and / or these as the main ingredient and containing polar group Polymers containing polar groups from 0.1 to 9.9% by weight (based on 100 parts by weight of the Top and / or bottom film) contains and the means film or middle layer made of ethylene vinyllace tat copolymer, ethylene vinyl acetate carbon mono xid terpolymer, polyamide, chlorinated polyethylene len, modified ethylene-propylene-diene polymer sat, ethylene-acrylic acid co- or terpolymer, Ethylene-acrylic acid ester copolymer or terpolymer, Maleic anhydride terpolymer and / or Cellu loseacetobutyrat exists or one or more these polymers in addition to processing aids, additives contains agents, fillers and / or pigments, that one of these plastic films, plastic olienbahnen or corresponding plastic film railway cuts of the same or different types composition separate from the front and back surface of the cardboard blank fed to the front and back surface of the cardboard blank applied and the plastic films, plastic film webs or Plastic sheeting cut to the cardboard cut or protrude the flat substrate Outer edges in the high frequency welding process are welded together. 10. The method according to claim 9, characterized in that as an at least three-layer composite film Composite foil or a composite foil blank ver a top film or top is used layer whose thickness is less than 65%,  preferably 2-45%, the thickness of the middle layer or middle film and is made of polyethylene low density (LLDPE or LDPE) exists or this in addition to processing aids, additives, Fillers and / or pigments and / or these as Main component and polar group containing Polymers containing polar groups from 0.1 to 9.9% by weight (based on 100 parts by weight of the Top and / or bottom film) contains and their Mit telfoil or middle layer made of ethylene vinyllace tat copolymer, ethylene vinyl acetate carbon mono xid terpolymer, polyamide, chlorinated polyethylene len, modified ethylene-propylene-diene polymer sat, ethylene-acrylic acid co- or terpolymer, Ethylene-acrylic acid ester copolymer or terpolymer, Maleic anhydride terpolymer and / or Cellu loseacetobutyrat exists or one or more this polymer contains or in addition to Ver work aids, additives, fillers and / or contains pigments that the composite film webs or composite film web cuts to the front and fed back surfaces of the cardboard blanks that polygonal, preferably square, rectangular or are square on the front and back surfaces surface of the cardboard blanks and the plastic sheeting on the cardboards cut up to a maximum of 8 mm protruding up to a maximum of 4 mm protruding film rims provided with a high-frequency weld seam, preferably on the protruding outer edges in High frequency separating welding processes with each other be welded.   11. The method according to claims 9 and 10, characterized in that the rectangular Pappenzu cuts, consisting of a rectangular Ord nerrückenpappenzuttcut and each a right corner-shaped front and a backside cover paper, penzuschnitt, side by side at a distance of
0.2 mm to 15 mm, preferably
0.5 mm to 8 mm,
arranged and the entire surface are surrounded by two identical or different, at least three-layer composite film webs on their front and back surfaces, the bottom layer or bottom film of which directly surrounds the cardboard blanks or whose bottom layer or bottom film is cut or glued with the cardboards directly or via a melt adhesive layer or adhesive layer is, the plastic film webs protrude beyond the outer edges of the cardboard blank and at a distance from the outer edge of the cardboard blank of
0.1 to 8 mm, preferably
0.5 to 4 mm,
high-frequency separating seams are welded together. 12. The method according to one or more of claims 9 to 11, characterized in that in each case at least three next to each other at a distance of
0.2 mm to 15 mm, preferably
0.5 mm to 8 mm,
Arranged, rectangular cardboard blanks, consisting of a rectangular cardboard folder spine and a rectangular front and back cover cardboard blank, all over the entire area are surrounded by two identical or different, at least three-layer composite film webs, the lower layer or lower film of which directly surrounds the cardboard cuts or the lower layer or lower film of which Pappenzu cut directly or over a melt adhesive layer or adhesive layer is sealed or glued that the over the outer edges of the Pappenzu cut protruding plastic film webs or plastic film web cuts at a distance from the edge of the cardboard blank of
0.1 to 8 mm, preferably
0.5 to 4 mm,
high-frequency seams are welded and the film web parts, film web fields or film web lines lying between the spaced-apart rectangular cardboard cuts are connected by at least one high-frequency weld seam or Hochfre quenzziernaht including the cardboard blanks. 13. The method according to one or more of claims 1 to 12, characterized in that a composite fo lienbahn or a composite film cut ver is used, their central film thickness or average layer thickness 30-500 µm, preferably 40-350 µm, is, while the thickness of the bottom film or Un top layer and / or top film or top layer 10-  225 µm, preferably 15-100 µm, is that the Plastic composite film webs or plastic films cuts to the front and back surface of each because three next to each other at a distance from each other the arranged cardboard blanks consisting of Front cover, folder spine and back cover, applied and at a distance from the Cardboard blank outer edges in high-frequency separation welding process that are welded seams welded, thinned material or lines over the foil grid with those of Fo cardboard blanks still enclosed in Connect, with the material diluted Places, lines and the like. Thickness less than 15%, preferably less than 10%, of the total thickness of the (two) plastic film webs or Have plastic film blanks and die High-frequency weld seam protruding foil grid subsequently separated, at the same time before or after that between the cardboards cut arranged film web parts, film web fields or foil web lines in high frequency welding processes are welded together.