DE102019114197A1 - Recording material comprising a printable recording layer, in particular a printable glossy or high-gloss layer, and a barrier layer, as well as production methods and uses therefor - Google Patents

Abstract

A recording material (1) is described, at least comprising a printable recording layer (10) comprising at least one binder and preferably at least one pigment, a first carrier layer (20) and a barrier layer (30) comprising at least one barrier material. In particular, a recording material (1) is also specified as a multilayer composite material, at least comprising a printable glossy or high-gloss layer (10), a first carrier layer (20), an adhesive layer (21), a second carrier layer (22) and a first (30) and, if necessary, further barrier layers. A method for producing the above-mentioned recording material is also described. It also describes the use of a barrier paper, at least comprising the layers of paper substrate as a carrier layer (22) and a first barrier layer (30), for producing a recording material as a multilayer composite material comprising a printable glossy or high-gloss layer. In addition, the use of a recording material specified above for packaging a product is described.

Description

The present invention relates to a recording material at least comprising a printable recording layer comprising at least one binder and preferably at least one pigment, a first carrier layer and a barrier layer comprising at least one barrier material. In a preferred embodiment, the present invention relates to a recording material as a multilayer composite material, at least comprising a printable glossy or high-gloss layer, a first carrier layer, an adhesive layer, a second carrier layer and a first and optionally further barrier layers. Furthermore, the present invention also relates to a method for producing the recording material specified above and the use of a barrier paper, at least comprising the layers of paper substrate as a carrier layer and first barrier layer, for producing a recording material as a multilayer composite material comprising a printable glossy or high-gloss layer, and the use of a recording material specified above for packaging a product.

The barrier layer of a recording material - in particular a barrier paper - for packaging high-quality products is subject to a wide range of requirements, which in sum are not easy to meet: with regard to the barrier function, the recording material should have a high or defined resistance to penetration by water , Water vapor, fats, oils and / or odors in order to protect the products packaged therein effectively against environmental influences. It should also be possible to dispose of the packaging or recording material as problem-free as possible. With regard to the effect on the customer or consumer, especially in the case of high-quality products, a recording material should also have an attractive appearance, which is determined, for example, by the high quality of a printed image on the packaging and its high-quality impression, if possible, by a glossy or high-gloss one Surface should be rounded.

So far, such quality papers, which are characterized by excellent printability and / or by a glossy or high-gloss surface, if they are offered at all with a barrier function, have generally been equipped with plastic films for this purpose.

Conventional packaging papers for foodstuffs, such as in the document, are known, for example DE 10 2014 119 572 A1 described.

A film composite packaging material is already offered as a further packaging option. A film composite packaging material can consist, for example, of a film composite material formed from a paper and a plastic and / or aluminum film. For example, paper is coated on one side with polyethylene, often in an extrusion process, or with an aluminum foil. These film composite packaging materials are characterized by high fat resistance, but their recyclability and biodegradability are limited.

In the document EP 3 342 929 A1 describes a barrier paper for contact with food, which has a high resistance to fats and / or oils and / or moisture and which is not a film composite packaging material, since it does without plastic or metal films. However, it is not a high quality paper with exceptionally good printability.

There is therefore a great need in industry and commerce for packaging materials, especially packaging paper, for high-quality products such as electrical goods, pharmaceuticals or medicinal products and high-quality food, which are characterized by excellent printability and / or a glossy or high-gloss surface , as well as one or more barrier functions to protect high-quality products from environmental influences.

In addition, for the packaging of the products it is desirable if the packaging material, in particular the barrier paper, is heat sealable, i. that it can be bonded to surfaces under the influence of heat and possibly pressure.

• So können beispielsweise an sich bekannte Barrierepapiere in der Regel nicht auf ihrer der Barriereschicht (bzw. der ihren Barriereschichten) gegenüberliegenden Seite mit einer Funktionsschicht wie einer bedruckbaren Aufzeichnungsschicht versehen („gestrichen“) werden. Die zum Streichen von Funktionsschichten auf einem Papiersubstrat eingesetzten Streichfarben sind üblicherweise wasserbasiert und liegen meist in Form wässriger Dispersionen vor (Näheres dazu siehe unten). Es hat sich nun herausgestellt, dass eine wasserbasierte Streichfarbe bzw. auch deren Binderanteile nicht oder nur sehr unvollständig in das Papiersubstrat eines Barrierepapiers eindringen können - wohl, weil übliche Barriereschichten eine sehr geringe Luftdurchlässigkeit aufweisen, so dass eine gute Strichhaftung (d.h. eine gute Haftung der durch die Streichfarbe auf das Papier übertragenen Beschichtungsbestandteile) in diesem Fall nicht gewährleistet werden kann. Eine zusätzliche Schwierigkeit ergibt sich bei der Herstellung von (einseitig) hochglänzenden Papierqualitäten, welche nach dem an sich bekannten Gussstreichverfahren hergestellt werden. Bei diesem Verfahren erfolgt die Trocknung des aufgetragenen Striches, d.h. die Entfernung überschüssigen Wassers aus der Streichfarbe, überdie nicht gestrichene Seite (Rückseite) des Papiersubstrats, da der Gussstrich auf der verchromten Oberfläche des Streichmaschinen-Zylinders liegt, welcher die glänzende bzw. hochglänzende Oberfläche (auf der bedruckbaren Aufzeichnungsschicht) erzeugen soll. Ist auf der Rückseite des Papiersubstrats nun eine Barriereschicht aufgebracht, so kann das überschüssige Wasser nicht oder allenfalls unvollständig über die Rückseite abgeführt werden, was zu einer schlechten Strichtrocknung und einer glanzlosen oder glanzarmen Oberfläche des erzeugten Barrierepapiers führt. Hochwertige Barrierepapierqualitäten lassen sich auf diesem Wege daher nicht erzeugen.

So far, however, various obstacles have stood in the way of meeting the aforementioned needs:

• For example, barrier papers known per se cannot generally be provided (“painted”) with a functional layer such as a printable recording layer on their side opposite the barrier layer (or the side opposite its barrier layers). The coating colors used to paint functional layers on a paper substrate are usually water-based and are mostly in the form of aqueous dispersions (for more details, see below). It has now been found that a water-based coating color or its binder components cannot penetrate the paper substrate of a barrier paper, or only very incompletely - probably because conventional barrier layers have very low air permeability, so that good coat adhesion (i.e. good adhesion of the coating components transferred to the paper by the coating color) cannot be guaranteed in this case. An additional difficulty arises in the production of (one-sided) high-gloss paper qualities which are produced by the cast coating process known per se. In this process, the applied coating is dried, i.e. excess water is removed from the coating color, over the uncoated side (back) of the paper substrate, since the cast coating lies on the chrome-plated surface of the coating machine cylinder, which is the glossy or high-gloss surface ( on the printable recording layer). If a barrier layer is now applied to the back of the paper substrate, the excess water cannot or at most incompletely be removed via the back, which leads to poor line drying and a dull or lackluster surface of the barrier paper produced. High-quality barrier paper qualities cannot therefore be produced in this way.

On the other hand, it is hardly or not at all possible to use a quality paper whose printable recording layer is e.g. a glossy or high-gloss layer is surface-refined - for example, a glossy or high-gloss quality paper produced using the cast coating process - to give barrier properties through the subsequent application of a barrier layer. This solution is opposed by the fact that a quality paper with excellent printability and / or with a glossy or high-gloss surface for finishing with a barrier coating would have to be fed back to the coating machine in order to apply a barrier screed. It has been shown, however, that such a renewed passage of said quality paper through the paper coating machine cannot be completed without loss of quality or even damage to a previously applied glossy or high-gloss printable recording layer on the paper. High-quality barrier paper qualities, in particular those with a glossy or high-gloss printable recording layer, are therefore also practically inaccessible in this way.

It was therefore a primary object of the present invention to provide a recording material which, in addition to excellent printability, also has a barrier functionality. A further, specific object of the present invention was to provide such a recording material as mentioned above which, moreover, also has a glossy or high-gloss surface of the printable recording layer.

An additional object of the present invention was to provide a recording material specified above which, due to its high-quality optical impression, can be used as a packaging material for, above all, high quality products are also suitable.

Further objects of the present invention consisted in providing a production method for a recording material specified above and in expanding the range of use of barrier papers known per se.

• aa) eine bedruckbare Aufzeichnungsschicht (10), umfassend mindestens ein Bindemittel und vorzugsweise mindestens ein Pigment,
• ba) eine erste Trägerschicht (20), vorzugsweise umfassend ein erstes Trägersubstrat,
• bd) vorzugsweise eine Zwischenschicht (23), umfassend mindestens ein Bindemittel, und
• ca) eine erste Barriereschicht (30), umfassend mindestens ein Barrierematerial ausgewählt aus der Gruppe bestehend aus
  • - polymere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus
  • - Polyacrylate,
  • - Polymethacrylate,
  • - Acrylat-Copolymere, wobei vorzugsweise deren Monomere jeweils unabhängig voneinander ausgewählt sind aus der Gruppe bestehend aus Acrylsäurealkylester (vorzugsweise Acrylsäuremethylester, Acrylsäurebutylester und Acrylsäure-2-ethylhexylester), Methacrylsäurealkylester (vorzugsweise, Methacrylsäuremethylester, Methacrylsäurebutylester und Methacrylsäure-2-ethylhexylester), Acrylnitril, Methacrylnitril, Styrol, α-Methylstyrol und deren Gemische,
  • - Polystyrole,
  • - Polybutadiene,
  • - Polyacrylnitrile,
  • - Polyethylene und
  • - deren Gemische,
  • - natürliche Wachse, vorzugsweise Wachse auf der Basis pflanzlicher Öle, besonders bevorzugt Wachse gewonnen durch chemische Modifikation pflanzlicher Öle,
  • - synthetische Wachse, vorzugsweise Wachse umfassend ein oder mehrere gesättigte Kohlenwasserstoffe,
  • - pflanzliche Öle,
  • - organische Pigmente,
  • - anorganische Pigmente,
  • - vernetzte Polysaccharide, vorzugsweise mindestens ein vernetztes Xylan und
  • - deren Mischungen,

wobei die Schichten in der Reihenfolge aa), ba), bd) (sofern vorhanden) und ca) angeordnet sind.It has now surprisingly been found that the primary object and further objects and / or partial objects of the present invention are achieved by a recording material ( 1 ) at least comprising or consisting of the following layers:

• aa) a printable recording layer ( 10 ), comprising at least one binder and preferably at least one pigment,
• ba) a first carrier layer ( 20th ), preferably comprising a first carrier substrate,
• bd) preferably an intermediate layer ( 23 ), comprising at least one binder, and
• ca) a first barrier layer ( 30th ), comprising at least one barrier material selected from the group consisting of
  • - Polymeric binders, preferably selected from the group consisting of
  • - polyacrylates,
  • - polymethacrylates,
  • - Acrylate copolymers, the monomers of which are preferably each independently selected from the group consisting of alkyl acrylate (preferably methyl acrylate, butyl acrylate and 2-ethylhexyl acrylate), alkyl methacrylate (preferably methyl methacrylate, butyl methacrylate, and 2-ethylhexyl methacrylate) , Styrene, α-methylstyrene and their mixtures,
  • - polystyrene,
  • - polybutadienes,
  • - polyacrylonitrile,
  • - Polyethylene and
  • - their mixtures,
  • - natural waxes, preferably waxes based on vegetable oils, particularly preferably waxes obtained by chemical modification of vegetable oils,
  • - synthetic waxes, preferably waxes comprising one or more saturated hydrocarbons,
  • - vegetable oils,
  • - organic pigments,
  • - inorganic pigments,
  • - crosslinked polysaccharides, preferably at least one crosslinked xylan and
  • - their mixtures,

wherein the layers are arranged in the order aa), ba), bd) (if present) and ca).

A recording material described above, or a preferred recording material according to the invention as a multilayer composite material described in more detail below, is in each case outstandingly suitable as a high-quality packaging material which (depending on the nature of the printable recording layer) can be printed (on one side) with various printing processes and which at the same time has one or more has several barrier functions, in particular barrier functions against water, steam, fat, oil and / or oxygen and / or barrier functions to protect against aromas and / or to avoid escaping odors. The recording material according to the invention is preferably not a composite film comprising plastic film or aluminum film.

The invention and combinations of preferred parameters, properties and / or components of the present invention preferred according to the invention are defined in the appended claims. Preferred aspects of the present invention are also given or defined in the following description and in the examples.

The recording material according to the invention is preferably ( 1 ), particularly preferably a recording material according to the invention comprising one or more waxes, heat-sealable, ie it can be bonded to surfaces under the action of heat and possibly pressure.

The recording material according to the invention ( 1 ) can only have the aforementioned layers or it can also have further, additional layers. For example, the recording material according to the invention can have more than one barrier layer, in particular two, three or more barrier layers. The two, three or more barrier layers are preferably arranged on top of one another and in contact with one another. If the recording material according to the invention comprises two or more barrier layers, these are preferably selected in such a way that they mutually reinforce and / or complement one another in terms of their barrier effect. The recording material according to the invention can likewise have more than one intermediate layer, in particular two, three or more intermediate layers.

In preferred variants of the present invention (for more details see below) the recording material according to the invention described above ( 1 ) in addition to the layers specified above on further layers.

The printable recording layer ( 10 ) can be designed in various ways according to the invention, as described in more detail below. The nature of the binder or binders present in the printable recording layer and the pigments preferably present therein depends on the specific configuration of the printable recording layer. To form the printable recording layer, it can be useful or necessary, depending on the configuration, to apply one, two or more printing layer coating compositions (as specified in more detail below) to the first carrier substrate. The printable layers (in the case of two applied printing layer coating compositions, for example, referred to as "pre-coat" and "top coat") are included in the scope of the application of one, two or more print layer coating compositions to a first carrier substrate collectively referred to in the present invention as the “printable recording layer” (10).

In a first embodiment of the present invention, the printable recording layer comprises or consists ( 10 ) from a printable high-gloss layer. A printable high-gloss layer represents a high-gloss layer in the sense of the present invention and is preferably characterized by a gloss value of 40%, particularly preferably 45%, more preferably 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °. Furthermore, a printable recording layer according to the first embodiment of the present invention described here is preferably characterized by one according to DIN 53107: 2016-05 (Title: Testing of paper and cardboard - determination of the smoothness according to Bekk) determined Bekk smoothness from 100 to 2000 seconds, particularly preferably from 400 to 1800 seconds. Deviating from the DIN 53107: 2016-05 The Bekk smoothness is not measured on both sides of the paper, but only on the printable high-gloss layer ( 10 ).

A printable high-gloss layer according to the first embodiment of the present invention specified above is suitable for printing with common printing methods, preferably selected from the group consisting of offset printing, flexographic printing, screen printing, gravure printing and Hewlett-Packard (HP) indigo printing. Furthermore, a printable high-gloss layer according to the above-mentioned first embodiment of the present invention is suitable for a further, additional refinement by one or more treatment steps known per se, preferably selected from the group consisting of cold foil stamping, hot foil stamping, bronzing, metallization and painting. A recording material according to the invention comprising a printable recording layer according to the first embodiment of the present invention described here is preferably produced by a method according to the invention of variant B) described in more detail below. A recording material according to the invention comprising a printable recording layer according to the first embodiment of the present invention described here is preferably produced by applying only one line with a corresponding print layer coating composition, described in more detail below, comprising at least one binder and at least one pigment, preferably using the cast coating method for surface finishing is applied.

The printable recording layer ( 10 ) according to the invention can also be or comprise an ink-receptive layer (or an ink-printable recording layer), as described in more detail below. However, the above-described printable high-gloss layer according to the first embodiment of the present invention is not such an ink-receptive layer.

In inkjet printers, tiny ink droplets are sprayed from a nozzle onto a medium to be printed, the ink droplets being generated, for example, by a piezoelectric element or with the aid of a heating element. As the ink compositions for ink jet printing, aqueous inks, oil-based inks, or solid inks (hot-melt type inks) can be used. However, aqueous inks are preferred and commonly used because they have advantages in manufacturing and handling, and in terms of their smell and safety.

In order to obtain a very good print image, not only the quality of the printer, but also the quality of the medium to be printed (in particular an ink-printable recording layer) is relevant with inkjet printers. It is particularly important that the color that hits it can be easily absorbed by the medium without it running into the surface of the sheet or penetrating too deeply into the medium (e.g. paper). This is particularly relevant when printing detailed graphics or photos that require high resolution, i. many dots per inch ("DPI": dots per inch) of the print image should be achieved in order to obtain a good print image. In addition, the surface of the medium to be printed can be specially finished so that the image appears glossy or matt, for example.

In a second embodiment of the present invention, the printable recording layer comprises or consists ( 10 ) made of an ink-printable glossy layer. For the purposes of the present invention, an ink-printable high-gloss layer is an ink-receptive layer. An ink-printable high-gloss layer represents a high-gloss layer in the sense of the present invention and is preferably characterized by a gloss value of ≥ 40%, particularly preferably 45%, more preferably 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °. A recording material according to the invention comprising a printable recording layer according to the second embodiment of the present invention described here is preferably produced by a method according to the invention of variant B) described in more detail below. A recording material according to the invention comprising a printable recording layer according to the second embodiment of the present invention described here is preferably produced by applying at least two lines corresponding to suitable printing layer coating compositions (each) comprising at least one binder and at least one pigment (for details see below), preferably after the application of the second printing layer coating composition using the cast coating method known per se for surface finishing.

In a third embodiment of the present invention, the printable recording layer comprises or consists ( 10 ) from an ink-printable glossy layer. For the purposes of the present invention, an ink-printable glossy layer is an ink-receptive layer. For the purposes of the present invention, an ink-printable glossy layer represents a glossy layer and is preferably characterized by a gloss value of 20%, particularly preferably 25%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °. A recording material according to the invention comprising a printable recording layer according to the third embodiment of the present invention described here is preferably produced by a method according to the invention of variant B) described in more detail below. A recording material according to the invention comprising a printable recording layer according to the third embodiment of the present invention described here is preferably produced by applying at least two lines in accordance with suitable printing layer coating compositions comprising (each) at least one binder and at least one pigment (for details see below), preferably after After the application of the second printing layer coating composition, the surface refinement (glossy or silk-matt or “semi-glossy” surface) is produced by using a calender, which is known per se.

In a fourth embodiment of the present invention, the printable recording layer comprises or consists ( 10 ) from a matt ink-printable layer. For the purposes of the present invention, a matt ink-printable layer is an ink-receptive layer. A matt ink-printable layer is preferably characterized by a gloss value of <15%, preferably <10%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °. A recording material according to the invention comprising a printable recording layer according to the fourth embodiment of the present invention described here is preferably produced by a method according to the invention of variant A) described in more detail below. A recording material according to the invention comprising a printable recording layer according to the fourth embodiment of the present invention described here is preferably produced by applying at least one line of a correspondingly suitable printing layer coating composition comprising at least one binder and at least one pigment (for details see below).

In a fifth embodiment of the present invention, the printable recording layer comprises or consists ( 10 ) from a treated inkjet layer. For the purposes of the present invention, a treated inkjet layer is an ink-receptive layer. A treated inkjet layer is a coating that comprises at least one binder (preferably starch or polyvinyl alcohol), preferably additives (preferably cationic fixatives) and preferably at least one pigment. The treated inkjet layer is preferably used to improve the print image of an inkjet print or the inkjet printability of a printable recording layer. A recording material according to the invention comprising a printable recording layer according to the fifth embodiment of the present invention described here is preferably produced by a method according to the invention of variant A) described in more detail below. A recording material according to the invention comprising a printable recording layer according to the fifth embodiment of the present invention described here is preferably produced by applying a thin layer of a suitable printing layer coating composition, preferably with the film press in the paper machine, with preferably no further coating (for details see below) the coating machine takes place.

A recording material according to the invention specified above (or a recording material according to the invention specified as preferred in this text) is preferred, the printable recording layer ( 10 ) (additionally) comprises at least one pigment. Pigments which are preferably used in accordance with the invention in printable recording layers are given below in connection with the description of the printing layer coating compositions which are preferably used for the production of printable recording layers.

• wobei vorzugsweise das Aufzeichnungsmaterial zusätzlich eine unter der tintenbedruckbaren Aufzeichnungsschicht (10) und über der ersten Trägerschicht (20) angeordnete Metallschicht (11) aufweist und wobei vorzugsweise die tintenbedruckbare Aufzeichnungsschicht (10) auf der Metallschicht (11) und in Kontakt mit dieser angeordnet ist.

A recording material according to the invention given above is preferred in many cases, the printable recording layer ( 10 ) comprises or is an ink-receptive layer or an ink-printable recording layer,

• where preferably the recording material additionally has an under the ink-printable recording layer ( 10 ) and over the first carrier layer ( 20th ) arranged metal layer ( 11 ) and wherein preferably the ink-printable recording layer ( 10 ) on the metal layer ( 11 ) and is arranged in contact with it.

A recording material according to the invention, wherein the printable recording layer ( 10 ) comprises or is an ink-absorbing layer or an ink-printable recording layer, has the advantage that particularly inexpensive recording materials with a barrier layer can be produced with it, for example in comparison with offset printing. Ink-printable recording materials according to the invention are therefore particularly suitable even for the production of print series with a small number of editions.

If the printable recording layer of the recording material according to the invention comprises or is an ink-absorbing layer, a recording material according to the invention is further preferred, the ink-absorbing layer having a dry weight (lutro) in the range from 2 to 35 g / m ² , preferably in the range from 3 to 25 g / m ² , very particularly preferably in the range from 6 to 20 g / m ² .

When the dry weight is less than 3 g / m ² , the resulting ink-receptive layer cannot completely absorb the inks for full-color printing. If the dry weight of the ink receptive layer is more than 35 g / m ² , the resulting ink jet recording material may be too thick and the ink receptive layer may tend to crack during drying or during use.

If the printable recording layer of the recording material according to the invention comprises or is an ink-receptive layer, it is preferred according to the invention for the ink-receptive layer to contain pigments.

If the printable recording layer of the recording material according to the invention comprises or is an ink-absorbing glossy or high-gloss layer, a recording material according to the invention is likewise preferred, the ink-absorbing glossy or high-gloss layer (or at least one of these layers in the case of several ink-absorbing layers) at least one pigment selected from the group Consists of silica, aluminum oxide and aluminum oxide hydroxide. A recording material according to the invention is preferred, the ink-absorbing glossy or high-gloss layer containing silica and / or boehmite (AlO (OH) or γ-AlOOH).

In a particular variant of the present invention, it is preferred if the ink-absorbent layer contains pigments and comprises or is a microporous or nanoporous ink-absorbing layer.

A “microporous ink-receiving layer” in the context of the present invention is a coating whose composition comprises fine pigment particles and which have a pore diameter of less than 1 μm and more than 0.3 μm, preferably measured with the aid of gas adsorption according to DIN 66135.

A “nanoporous ink-receiving layer” in the sense of the present invention is a coating whose composition comprises fine pigment particles and these have a pore diameter of less than 300 nm, preferably measured with the aid of gas adsorption according to DIN 66135.

According to the invention, it is preferred if the pigments of the aforementioned microporous or nanoporous ink-receiving layer have a pore diameter of less than 1 μm, preferably less than 750 nm, particularly preferably less than 500 nm, measured with the aid of gas adsorption according to DIN 66135.

It is further preferred according to the invention if the pigments of the aforementioned microporous or nanoporous ink-receiving layer have a pore diameter of over 15 nm, preferably over 50 nm, particularly preferably over 100 nm, measured with the aid of gas adsorption according to DIN 66135.

According to the invention, it is also preferred if the pigments of the aforementioned microporous or nanoporous ink-receiving layer have a pore diameter, measured with the aid of gas adsorption according to DIN 66135, in the range from 15 nm to 1000 nm, preferably from 50 nm to 750 nm, particularly preferably from 100 nm to 500 nm exhibit.

If the recording material according to the invention comprises an ink-receptive layer, a recording material is also preferred according to the invention in many cases, the ink-receptive layer containing boric acid or a borate.

If the recording material according to the invention comprises or is an ink-receptive layer, according to the invention in many cases a recording material is preferred, the ink-receptive layer containing a mass fraction of 0.001 to 0.1, preferably 0.01 to 0.05 boric acid or borate, based on the as Binder preferably used polyvinyl alcohol.

According to the invention, ink-receptive layers which are preferred to be used in many cases are for example in the document DE 69402121 T2 described. The ink-receptive layers specified there in Examples 1 and 2 are particularly preferred according to the invention in many cases.

If the recording material according to the invention comprises (at least) one ink-receptive layer, a recording material according to the invention is also preferred, the ink-receptive layer containing at least one binder, preferably selected from the group consisting of polyvinyl alcohol, copolymer of polyvinyl alcohol, ethylene-vinyl acetate copolymer, starch, styrene -Butadiene latex and styrene-acrylate latex.

Our own investigations have shown that recording materials according to the invention comprising (at least) one ink-absorbing layer have particularly good properties if polyvinyl alcohol is used as the binder or binder component of one or all of the ink-absorbing layers.

If the recording material according to the invention comprises an ink-absorbing layer, a recording material according to the invention is preferred, the ink-absorbing layer (or all ink-absorbing layers) having (or have) polyvinyl alcohol as a binder or as the binder, preferably a polyvinyl alcohol with a) a degree of saponification of more than 50 mol%, preferably more than 75 mol%, particularly preferably more than 90 mol%, and / or b) has a degree of polymerization of at least 500, preferably of at least 800, particularly preferably of at least 1000 ( or have).

If the recording material according to the invention comprises an ink-receptive layer, recording materials according to the invention have particularly good properties if the polyvinyl alcohol used as a binder has the properties specified in more detail here.

The degree of polymerization of polyvinyl alcohol can be determined with the aid of gel permeation chromatography (GPC), with tetrahydrofuran (THF) being used as the eluent or solvent, polyvinyl alcohol as the standard and an RI detector. The differential refractive index detector (RI = Refractive Index Detector) measures the difference between the refractive index of the sample and the pure THF solvent.

If the recording material according to the invention (comprising an ink-receptive layer) has a metal layer described above ( 11 ), it is possible to give the recording material a metallic look as a special effect.

The metal layer ( 11 ) can be achieved by using an adhesive ( 12th ) on the back of the carrier substrate of the first carrier layer ( 20th ), or it can be applied by vapor deposition of the metal forming the metal layer onto the back of the carrier substrate of the first carrier layer ( 20th ) are applied. If the metal layer is made by using an adhesive ( 12th ) on the back of the carrier substrate of the first carrier layer ( 20th ) was applied, then between the carrier substrate the first carrier layer ( 20th ) and the metal layer ( 11 ) an adhesive layer ( 12th ) arranged, which the metal layer ( 11 ) with the first Carrier layer ( 20th ) (or with the carrier substrate of the first carrier layer) connects. The adhesive is preferably ( 12th ) a polyurethane adhesive.

If a recording material according to the invention has one or more intermediate layers ( 23 ), this intermediate layer comprises one or more binders, preferably one or more crosslinked or uncrosslinked binders, which are particularly preferably selected from the group consisting of starch, polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, silanol group-modified polyvinyl alcohol, diacetone-modified polyvinyl alcohol, ethylene -Vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, acrylate copolymer (including styrene-acrylate polymers and film-forming acrylic copolymers), modified polyethylene glycol, unmodified polyethylene glycol, α-isodecyl-ω-hydroxy -Poly (oxy-1,2-ethanediyl), styrene-butadiene latex, and their mixtures.

A recording material according to the invention is preferred in which the one or more intermediate layers ( 23 ) (if present) comprise or consist of one or more acrylate copolymers and / or styrene-acrylate polymers as binders.

The one or more intermediate layers contained in a recording material according to the invention primarily have the purpose of smoothing the surface of the carrier substrate. However, such intermediate layers can also - e.g. due to the nature of the binders contained therein - each have certain barrier functions. An intermediate layer contained in a recording material according to the invention can, for example, also be a barrier undercoat. In addition to the one or more binders listed above, the one or more intermediate layers contained in a recording material according to the invention can also comprise further components.

If a binding agent is present in an intermediate layer of a recording material according to the invention, which also has the function of a barrier material (as defined in this text), the mass fraction of this binding agent in the intermediate layer and in the barrier layer is in the present text separately (i.e. for each of the two functions as a binder of the intermediate layer and as a barrier material of the barrier layer individually).

A recording material according to the invention is preferred in which the mass fraction of the one or more binders in the intermediate layer ( 23 ) is in the range from 95 to 40%, preferably from 85 to 60%, particularly preferably from 80 to 60%, based on the total mass of an intermediate layer ( 23 ). The mass per unit area of an intermediate layer is preferably ( 23 ) of a recording material according to the invention in the range from 1.5 to 6 g / m ² , preferably from 2.0 to 5.5 g / m ² , particularly preferably from 2.0 to 4.8 g / m ² .

• - einen Glanzwert von ≥ 40 %, besonders bevorzugt von ≥ 45 %, mehr bevorzugt von ≥ 50 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 20°, oder
• - einen Glanzwert von ≥ 40 %, besonders bevorzugt von ≥ 45 %, mehr bevorzugt von ≥ 50 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 60°, oder
• - einen Glanzwert von ≥ 20 %, besonders bevorzugt von ≥ 25 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 60°.

A recording material according to the invention specified above is preferred (or a recording material according to the invention specified as preferred in this text), the printable recording layer ( 10 ) comprises or is, preferably having, a printable high-gloss layer or a printable glossy layer

• a gloss value of 40%, particularly preferably 45%, more preferably 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °, or
• a gloss value of 40%, particularly preferably 45%, more preferably 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °, or
• - A gloss value of ≥ 20%, particularly preferably ≥ 25%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °.

A recording material according to the invention, in which the printable recording layer ( 10 ) a printable high-gloss layer (or a high-gloss layer in the sense of the present invention) or a printable gloss layer (or a glossy layer in the sense of the present invention) comprises or is (in the sense of the first, second or third embodiment of the described in this text present invention), is preferred according to the invention. If the printable recording layer ( 10 ) comprises or is a printable high-gloss layer or a printable glossy layer, it is preferred according to the invention if the recording material according to the invention is in addition to those mentioned above Layers, printable recording layer, first carrier layer and first barrier layer, still further layers.

• aa) eine bedruckbare Aufzeichnungsschicht (10), vorzugsweise eine bedruckbare Hochglanzschicht oder eine bedruckbare Glanzschicht, umfassend mindestens ein Pigment und mindestens ein Bindemittel,
• ba) eine erste Trägerschicht (20);
• bb) eine Klebeschicht (21);
• bc) eine zweite Trägerschicht (22);
• bd) vorzugsweise eine Zwischenschicht (23) umfassend mindestens ein Bindemittel und
• ca) eine erste Barriereschicht (30), umfassend mindestens ein Barrierematerial ausgewählt aus der Gruppe bestehend aus
  • - polymere Bindemittel, ausgewählt aus der Gruppe bestehend aus
  • - Polyacrylate,
  • - Polymethacrylate,
  • - Acrylat-Copolymere, wobei vorzugsweise deren Monomere jeweils unabhängig voneinander ausgewählt sind aus der Gruppe bestehend aus Acrylsäurealkylester (vorzugsweise Acrylsäuremethylester, Acrylsäurebutylester und Acrylsäure-2-ethylhexylester), Methacrylsäurealkylester (vorzugsweise, Methacrylsäuremethylester, Methacrylsäurebutylester und Methacrylsäure-2-ethylhexylester), Acrylnitril, Methacrylnitril, Styrol, α-Methylstyrol und deren Gemische,
  • - Polystyrole,
  • - Polybutadiene,
  • - Polyacrylnitrile,
  • - Polyethylene und
  • - deren Gemische,
  • - natürliche Wachse, vorzugsweise Wachse auf der Basis pflanzlicher Öle, besonders bevorzugt Wachse gewonnen durch chemische Modifikation pflanzlicher Öle,
  • - synthetische Wachse, vorzugsweise Wachse umfassend ein oder mehrere gesättigte Kohlenwasserstoffe,
  • - pflanzliche Öle,
  • - organische Pigmente,
  • - anorganische Pigmente,
  • - vernetzte Polysaccharide, vorzugsweise ein vernetztes Xylan und
  • - deren Mischungen,

wobei die Schichten in der Reihenfolge aa), ba), bb), bc), sofern vorhanden bd), und ca) angeordnet sind.Accordingly, a recording material according to the invention specified above is particularly preferred ( 1 ) (or a recording material according to the invention indicated as preferred in this text), preferably as a multilayer composite material, at least comprising the following layers or consisting of the following layers:

• aa) a printable recording layer ( 10 ), preferably a printable high-gloss layer or a printable glossy layer, comprising at least one pigment and at least one binder,
• ba) a first carrier layer ( 20th );
• bb) an adhesive layer ( 21st );
• bc) a second carrier layer ( 22nd );
• bd) preferably an intermediate layer ( 23 ) comprising at least one binder and
• ca) a first barrier layer ( 30th ), comprising at least one barrier material selected from the group consisting of
  • - polymeric binders selected from the group consisting of
  • - polyacrylates,
  • - polymethacrylates,
  • - Acrylate copolymers, whereby their monomers are preferably each independently selected from the group consisting of acrylic acid alkyl ester (preferably acrylic acid methyl ester, acrylic acid butyl ester and acrylic acid 2-ethylhexyl ester), methacrylic acid alkyl ester (preferably methacrylic acid methyl ester, methacrylic acid butyl ester, methacrylic acid 2-ethylhexyl ester), Methacrylonitrile, styrene, α-methylstyrene and their mixtures,
  • - polystyrene,
  • - polybutadienes,
  • - polyacrylonitrile,
  • - Polyethylene and
  • - their mixtures,
  • - natural waxes, preferably waxes based on vegetable oils, particularly preferably waxes obtained by chemical modification of vegetable oils,
  • - synthetic waxes, preferably waxes comprising one or more saturated hydrocarbons,
  • - vegetable oils,
  • - organic pigments,
  • - inorganic pigments,
  • - crosslinked polysaccharides, preferably a crosslinked xylan and
  • - their mixtures,

whereby the layers are arranged in the order aa), ba), bb), bc), if available bd), and ca).

The above-mentioned recording material preferred according to the invention ( 1 ), preferably as a multilayer composite material, comprises as a printable recording layer ( 10 ) preferably a printable recording layer according to the above-described first aspect of the present invention (printable high-gloss layer), according to the above-described second aspect (ink-receptive high-gloss layer) of the present invention or according to the above-described third aspect of the present invention (ink-receptive glossy layer). There how described above, a recording material with a glossy or high-gloss surface of the printable recording layer cannot be refined in the conventional manner by painting with a barrier layer, the recording material according to the invention specified above is ( 1 ), preferably as a multi-layer composite material, especially preferred for these configurations, since it allows the combination of the properties: excellent printability, glossy or high-gloss surface and in addition one or more barrier layers or barrier properties. According to the invention, a recording material is particularly preferred in which the printable recording layer ( 10 ) comprises or is a printable high-gloss layer (or a high-gloss layer in the sense of the present invention) (in the sense of the first or second embodiment of the present invention described in this text).

In the context of the present invention, an adhesive denotes a non-metallic substance which is able to connect materials through surface adhesion and its internal strength (cohesion). The adhesive to be used according to the invention (see also the following details in connection with the method according to the invention) can be a physically setting adhesive, a chemically curing adhesive or an adhesive without a solidification mechanism. Adhesives that physically set and chemically harden at the same time, ie adhesives with a combined hardening mechanism, can also be used. An adhesive layer results from the adhesive used ( 21st ). Depending on the solidification mechanism of the adhesive, the adhesive and the adhesive layer resulting from the adhesive can have the same or a different chemical composition. If the adhesive hardens through a chemical reaction or sets through the evaporation of a solvent, there is a difference between the adhesive used and the resulting adhesive layer. When using hot-melt adhesives that do not additionally cure chemically, the chemical composition of the adhesive and the resulting adhesive layer are identical.

• - Polyamiden,
• - Polyolefinen, vorzugsweise Polyethylen und amorphen Polyalphaolefinen,
• - Ethylenvinylacetat-Copolymeren,
• - Polyester-Elastomeren,
• - Polyurethan-Elastomeren,
• - Copolyamid-Elastomeren,
• - Vinylpyrrolidon/Vinylacetat-Copolymeren und
• - deren Mischungen bzw. Kombinationen.

A recording material according to the invention specified above is therefore also preferred ( 1 ) (or a recording material according to the invention indicated as preferred in this text), preferably a recording material according to the invention indicated above ( 1 ) as a multilayer composite material, whereby the adhesive layer ( 21st ) comprises or is a hot melt adhesive layer,
wherein the hotmelt adhesive layer preferably comprises at least one polymer selected from the group consisting of

• - polyamides,
• - polyolefins, preferably polyethylene and amorphous polyalphaolefins,
• - ethylene vinyl acetate copolymers,
• - polyester elastomers,
• - polyurethane elastomers,
• - copolyamide elastomers,
• - vinyl pyrrolidone / vinyl acetate copolymers and
• - their mixtures or combinations.

The first carrier layer preferably comprises or consists ( 20th ) of the recording material according to the invention ( 1 ) from a first carrier substrate ( 20th ) with a front side (first side) and a back side opposite this front side (second side). The first carrier substrate is preferably selected from the group consisting of synthetic paper and paper. The first carrier substrate is particularly preferably selected from the group consisting of a coated paper substrate (where a paper substrate in the context of the present text means a carrier substrate comprising paper or consisting of paper), an uncoated paper substrate, a non-surface-treated coated paper substrate and combinations of the aforementioned paper substrates. A plastic film can also be used as the first carrier substrate, but this is not preferred according to the invention.

The application of a coating to a carrier substrate, in particular a paper substrate, is also referred to in paper technology as “painting” and the coating to be applied is referred to as “coating color” (in the context of the present invention, a coating color is also referred to as “coating composition”; on this and on techniques for applying coating compositions to a carrier substrate see below). The coating applied by brushing can be functional and serve to impart certain properties to the carrier substrate (eg to form a recording layer or a barrier layer) or be structural (eg to form an intermediate layer that smooths the surface of the carrier substrate). In principle, it can be applied on one or both sides of the carrier substrate, but application on only one side may be preferred in a number of cases.

The coating color, which is applied to a carrier substance with a coating unit and dried, is also known as a "line" in technical terms. The coating color thus contains (in an aqueous system), in contrast to the coating, a higher proportion of water. Furthermore, crosslinking reactions can occur when the coating color dries and volatile substances evaporate. A “coated paper” is therefore a paper on which a coating has been applied using a coating composition (or a coating color).

A recording material according to the invention is particularly preferred in which the first carrier layer comprises a first carrier substrate which is selected from the group consisting of a coated paper substrate, an uncoated paper substrate, a non-surface-treated base paper substrate and combinations of the aforementioned paper substrates. In the context of the present invention, a recording material according to the invention is also preferred, where at least the first carrier substrate ( 20th ) comprises or is a non-surface-treated coating base paper substrate.

In the context of the present invention, “paper” is understood to mean paper, cardboard and cardboard. In the context of this invention, paper, cardboard and paperboard are flat materials that can be produced from the same basic materials and according to basically the same manufacturing methods. In the context of this invention, a distinction is made between paper, cardboard and cardboard only on the basis of the weight per unit area, cardboard having a weight per square meter of greater than 600 g / m ² , cardboard having a weight per square meter of greater than 150 and less than or equal to 600 g / m ² and paper having a weight per square meter of has less than or equal to 150 g / m ² .

In the context of the present invention, a coated paper substrate is understood to mean a paper substrate which comprises one or more layers applied by painting, in particular a two-, three-, four- or multi-layer paper substrate. Functional layers (but preferably no barrier layers as defined in the present text) and structure-forming layers (such as leveling layers for smoothing the surface) are suitable as layers of such a coated paper substrate.

In the context of the present invention, an uncoated paper substrate is understood to mean a paper substrate which is not coated (that is to say does not comprise layers applied by painting), but which can, however, comprise layers which are not or were not applied by painting. Thus, an uncoated paper substrate can be prepared and, for example, comprise a surface or a starch layer impregnated with starch.

A non-surface-treated coated base paper substrate is understood in the context of the present invention to mean a paper substrate which is uncoated and unprepared.

In general, in the field of specialty papers, the person skilled in the art basically converts them into “uncoated” papers (for example in the context of the present invention, for example a paper substrate) and into “coated” papers (for example in the context of the present invention, for example comprising a paper substrate a "barrier screed", see also below) divided or differentiated.

The second carrier layer preferably comprises or consists ( 22nd ) of the recording material according to the invention ( 1 ) from a second carrier substrate with a front side (first side) and a rear side opposite this front side (second side).

The first carrier layer ( 20th ) and the second carrier layer ( 22nd ) can be the same or different. The first carrier substrate and the second carrier substrate can be identical or different.

According to the invention, a recording material is preferred ( 1 ), the first carrier layer ( 20th ) and / or the second carrier layer ( 22nd ) has or have a mass per unit area in the range from 40 to 250 g / m ² , preferably in the range from 50 to 150 g / m ² , particularly preferably in the range from 60 to 100 g / m ² .

In preferred embodiments of the present invention, the first carrier layer ( 20th ) and the second carrier layer ( 22nd ) different and the second carrier layer ( 22nd ) comprises or consists of a paper substrate which itself already has certain barrier properties due to a suitable material selection and / or due to a suitable manufacturing process (as indicated below).

• - einem Papiersubstrat, welches bei einem Druck (angegeben als sog. Linienlast in kN/m) von mindestens 40 kN/m und einer Temperatur von mindestens 25 °C kalandriert wurde und/oder welches auf einer oder auf beiden Seiten vollflächig mit Stärke imprägniert ist und/oder einen Kurzfaser-Zellstoff mit einem Schopper-Riegler-Grad von mindestens 30°SR und einen Langfaser-Zellstoff mit einem Schopper-Riegler-Grad von mindestens 25°SR aufweist, (hier und für alle entsprechenden Angaben in diesem Text:) bestimmt nach DIN EN ISO 5267-1 : 2000-10 , und wobei das Papiersubstrat mindestens einen Massenanteil von 50 % Kurzfaser-Zellstoff umfasst, bezogen auf die Gesamtmasse aus im Papiersubstrat vorliegenden Kurzfaser-Zellstoff und Langfaser-Zellstoff;
• - einem Papiersubstrat, welches Zellstofffasern umfasst, wobei der Massenanteil der Zellstofffasern ≥ 90 % beträgt, bezogen auf die Gesamtmasse des Papiersubstrates und bestimmt als ofentrockener Massenanteil;
• - einem Papiersubstrat, welches Zellstofffasern umfasst, wobei zumindest ein Teil der Zellstofffasern aus Grasfasern besteht;
• - einem Papiersubstrat, welches einen Zellstoff umfasst, welcher
• - einen Schopper-Riegler-Grad im Bereich von 24 bis 54°SR, vorzugsweise im Bereich von 29 bis 49°SR, besonders bevorzugt im Bereich von 34 bis 44°SR, aufweist, bestimmt nach DIN EN ISO 5267-1 : 2000-10 , und/oder
• - einen KIT-Wert von mindestens 7, vorzugsweise von mindestens 11, besonders bevorzugt von mindesten 12, aufweist, gemessen nach Methode Tappi T 559; und
• - deren Mischungen bzw. Kombinationen.

A recording material according to the invention specified above is therefore also preferred ( 1 ) (or a recording material according to the invention specified as preferred in this text), wherein the first carrier layer and / or the second carrier layer comprises a paper substrate, preferably selected from the group consisting of a coated paper substrate, an uncoated paper substrate, a non-surface-treated coating base paper and combinations thereof ,
wherein the second carrier layer preferably comprises or is a paper substrate which is selected from the group (the group of paper substrates given below indicates those which themselves already have certain barrier properties due to a suitable choice of material and / or a suitable manufacturing process) consisting of:

• - a paper substrate that has been calendered at a pressure (specified as so-called line load in kN / m) of at least 40 kN / m and a temperature of at least 25 ° C and / or which is fully impregnated with starch on one or both sides and / or a short fiber pulp with a Schopper-Riegler degree of at least 30 ° SR and a long fiber pulp with a Schopper-Riegler degree of at least 25 ° SR, (here and for all relevant information in this text :) determined after DIN EN ISO 5267-1: 2000-10 , and wherein the paper substrate comprises at least a mass fraction of 50% short-fiber pulp, based on the total mass of short-fiber pulp and long-fiber pulp present in the paper substrate;
• - A paper substrate which comprises cellulose fibers, the mass fraction of the cellulose fibers being 90%, based on the total mass of the paper substrate and determined as the oven-dry mass fraction;
• a paper substrate comprising cellulose fibers, at least a part of the cellulose fibers consisting of grass fibers;
• - A paper substrate comprising a pulp, which
• - has a Schopper-Riegler degree in the range from 24 to 54 ° SR, preferably in the range from 29 to 49 ° SR, particularly preferably in the range from 34 to 44 ° SR, determined according to DIN EN ISO 5267-1: 2000-10 , and or
• - has a KIT value of at least 7, preferably of at least 11, particularly preferably of at least 12, measured by the Tappi T 559 method; and
• - their mixtures or combinations.

It has been shown that a paper substrate specified above, which was calendered at a pressure of at least 40 kN / m and a temperature of at least 25 ° C and / or which is fully impregnated with starch on one or both sides and / or which a short fiber pulp with a Schopper-Riegler degree of at least 30 ° SR and a long fiber pulp with a Schopper-Riegler degree of at least 25 ° SR, is particularly suitable for producing a barrier paper which has a very high barrier effect Has fat and / or oil and / or moisture. Paper substrates suitable for the purposes of the variant of the present invention described in this paragraph, their properties and preferred combinations are described in particular in the document EP 3 342 929 A1 .

It has also been shown that a paper substrate specified above, which comprises cellulose fibers, preferably sulfate cellulose fibers, the mass fraction of the cellulose fibers being ≥ 90%, based on the total mass of the paper substrate and determined as the oven-dry mass fraction, are excellently suited to a To produce barrier paper, which has a low water and water vapor permeability as well as a high fat and water resistance. In addition, it has been shown that such a paper substrate is outstandingly suitable for paper recycling due to its composition.

It has also been shown that an above-specified paper substrate which comprises cellulose fibers, at least part of the cellulose fibers consisting of grass fibers, is particularly suitable for the purposes of the present invention, the mass fraction of cellulose fibers in the paper substrate in the range from 1 to 100% (or 99%) consists of grass fibers, preferably in the range from 5 to 70%, particularly preferably in the range from 40 to 60, based on the total mass of the cellulose fibers and determined as oven-dry mass fraction. Such a paper substrate is also outstandingly suitable for paper recycling because of its composition.

It has then been shown that a paper substrate specified above, which comprises a cellulose pulp, which has a Schopper-Riegler degree in the range from 24 to 54 ° SR and / or a KIT value of at least 7, preferably when the paper substrate is a cellulose pulp comprises or consists of a short fiber pulp and a long fiber pulp in a ratio between short fiber pulp and long fiber pulp in the range from 2: 1 to 1: 2, preferably in the range from 1.5: 1 to 1: 1 , 5, leads to a particularly dense paper that already has a very high barrier effect against fat.

In the context of the present invention, a polymeric binder is preferably understood to mean a binder which has been built up from a large number of molecules by polycondensation and in which one or more types of atoms or atom groups (so-called repeat units) are repeatedly strung together and which Number of repeating units per molecule is more than 25.

In the context of the present invention, a component of a barrier layer (in particular a barrier layer ( 30th ) or (31)) suitable polymeric binder means any polymeric binder commonly used in paper production, preferably a crosslinked or uncrosslinked binder selected from the group consisting of starch, polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, silanol group-modified polyvinyl alcohol, diacetone-modified polyvinyl alcohol, Ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, modified polyethylene glycol, unmodified polyethylene glycol, α-isodecyl-ω-hydroxy-poly (oxy-1,2-ethanediyl), styrene Butadiene latex, acrylate copolymers (including styrene-acrylate polymers), and their mixtures. It has been shown that the aforementioned polymeric binders can significantly improve the mechanical properties of a barrier layer and / or the biodegradability of a recording material containing such a barrier layer. Some of the polymeric binders mentioned here already have certain barrier properties themselves and / or are also barrier materials (within the meaning of the present invention) and / or are barrier material precursors (within the meaning of the present invention, as described in more detail below).

A group of polymeric binders suitable as a barrier material and / or as a constituent of a barrier layer are, in the context of the present invention, preferred group of acrylate copolymers. An acrylate polymer, preferably an acrylate polymer to be used as a barrier material, is used in the context of present invention (and unless expressly stated otherwise in this text) preferably a copolymer derived from acrylic acid which has an average molar mass in the range from 50,000 to 150,000 g / mol, particularly preferably from 80,000 to 130,000 g / mol and very particularly preferably from 90,000 to 100,000 g / mol. For the purposes of the present invention, the mean molar mass is preferably determined with the aid of gel permeation chromatography (GPC) with tetrahydrofuran (THF) as solvent, polystyrene as standard and refractive index detection (RI detector, refractive index detector).

In the context of the present invention, an acrylate copolymer is particularly preferably a copolymer produced using two, three, four, five, six or all of the monomers selected from the group consisting of methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylic acid, 2-ethylhexyl methacrylic acid and styrene.

The properties of the resulting acrylate copolymer can be controlled in the desired manner through a selection of the monomers used to produce the acrylate copolymer. Our own studies have shown that an acrylate copolymer made from methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, ethyl-2-acrylate, ethyl-2-methacrylate and / or styrene has particularly good barrier properties.

In addition to methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate and styrene, other monomers may have been used to produce the acrylate copolymer or the copolymer was produced from two, three, four, five, six or all monomers selected from the group consisting of acrylic acid methyl ester, methacrylic acid methyl ester, acrylic acid butyl ester, methacrylic acid butyl ester, acrylic acid 2- ethylhexyl ester, 2-ethylhexyl methacrylate and styrene. According to the invention, the acrylate copolymer is particularly preferably a random copolymer.

In the context of the present invention, a natural wax suitable as a barrier material and / or as a component of a barrier layer is preferably a wax based on a vegetable oil. In the context of the present invention, a wax based on a vegetable oil is preferably understood to mean a wax that is or has been obtained by chemical modification of a vegetable oil. The chemical modification is preferably a partial or complete hydrogenation with a metallic catalyst, for example nickel, and hydrogen, all or only some of the double bonds present in the oil before the chemical modification being hydrogenated to single bonds. Unlike vegetable oils, waxes based on vegetable oils are not liquid but solid at 20 ° C. The chemical modification of the vegetable oil thus causes an increase in the melting point.

In the context of the present invention, a vegetable oil is understood to mean a fatty acid triglyceride (comprising naturally occurring fatty acids esterified with glycerol) which is obtained from plants or parts of plants. The oil is usually obtained by pressing, extraction or refining (of the oil or oils) from the plants or parts of plants. The extraction of the oils is known to the person skilled in the art. If plant seeds are used to produce oil, these are called oil seeds. In the seeds, the oil occurs in the form of lipids, which represent its cell membrane and energy reserves. Depending on the proportion of unsaturated fatty acids in the oil, a distinction is made between non-drying (e.g. olive oil), semi-drying (e.g. soy or rapeseed oil) and drying oils (e.g. linseed or poppy seed oil). The term "drying" does not mean evaporation, but the solidification or solidification of the oil caused by the oxidation and polymerization of the unsaturated fatty acids. The use of semi-drying and drying oils as starting materials for producing the waxes used according to the invention is preferred. A natural wax, for example in the form of a wax emulsion, for example in the form of a commercially available wax emulsion, can be contained in a barrier layer coating composition or in a barrier screed.

Possible sources for vegetable oils that can be used in the context of the present invention (or for waxes based on vegetable oils which can be used in the context of the present invention) are agai oil, algae oil, argan oil (from the fruits of the argan tree), avocado oil (from the pulp of the avocado of the avocado tree ), Babaçu oil, cottonseed oil (from the seeds of the cotton plant), borage oil or borage seed oil (from the seeds of the borage plant), cupuagu butter, cashew peel oil, safflower oil (also called "safflower oil", from the seeds of safflower or carthamus), peanut oil (from the fruit of the peanut plant), hazelnut oil (from the hazelnuts of the hazelnut bush), hemp oil (from the seeds of the edible hemp), jatropha oil (from the seeds of Jatropha curcas), jojoba oil (actually a liquid wax; from the seeds of the jojoba bush), Camellia oil (from the seeds of Camellia oleifera, Camellia sinensis or Camellia japonica, cocoa butter, coconut oil (from the seed flesh of the coconut, the tree fruit of the coconut spalme), pumpkin seed oil (also known as seed oil; from the seeds of the Styrian oil pumpkin), linseed oil (from the ripe flax seeds of the flax), camelina oil (from the seeds of the camelina, cruciferous family), macadamia oil (from the nuts of the macadamia tree), corn oil (from the germs of corn), almond oil (from the almonds of the almond tree), mango butter (from Mangifera indica), apricot kernel oil or apricot kernel oil (from the apricot kernel - i.e. the almond of the apricot stone - the apricot or apricot), poppy seed oil (from the seeds of the poppy seeds), evening primrose oil, olive oil ( from the pulp and core of the olive, the fruit of the olive tree, palm oil (from the pulp of the palm fruit, the fruit of the oil palm), palm kernel oil (from the kernels of the palm fruit, the fruit of the oil palm), papaya oil, pistachio oil, pecan oil, perilla oil the seeds of the perilla plant (shiso, sesame leaf), rapeseed oil (from the seeds of rapeseed, cruciferous family), rice oil, castor oil (from the seeds of the miracle tree), sea buckthorn oil (from the pulp of the family) he sea buckthorn berry, the fruit of the sea buckthorn bush), sea buckthorn kernel oil (from the kernels of the sea buckthorn berry, the fruit of the sea buckthorn bush), mustard oil (from the seeds of the black mustard), black cumin oil (from the seeds of the fruit capsule of the black cumin plant), sesame oil (from the seeds of the Sesame plant), shea butter (from the seeds of the shea nut tree), soybean oil (from the beans of the soybean), sunflower oil (from the kernels of the sunflower), tung oil, walnut oil (from the kernels of the walnut tree), watermelon seed oil, grapeseed oil (from the kernels of the fruit (grape) of the vine or grapevine), wheat germ oil (from the germs of wheat) and / or cedar oil (from the wood of the Lebanon cedar). This list is not to be regarded as closed; it shows possibilities for obtaining vegetable oils to be used according to the invention, which can be converted into a wax to be used according to the invention.

In the context of the present invention, waxes based on vegetable oil that are preferably to be used are selected from the list consisting of palm oil, coconut oil, poppy seed oil, olive oil, linseed oil, soybean oil, sunflower oil, safflower oil, rapeseed oil and mixtures thereof. The wax based on a vegetable oil for use in the context of the present invention is preferably a wax based on a soybean oil, ie soybean oil wax or soy wax.

It has been shown that waxes made from the oils mentioned above as being preferred are characterized by high resistance and that they can be produced with high melting points. The waxes to be used preferably according to the invention (palm oil wax, coconut oil wax, poppy seed oil wax, olive oil wax, linseed oil wax, soybean oil wax, sunflower oil wax, safflower oil wax and rapeseed oil wax and mixtures thereof) show a significant increase in resistance to fats and / or oils and / or moisture when used in barrier layers of recording materials according to the invention . Our own studies have shown that when using soybean oil wax, in addition to being resistant to fat, oil and moisture, very low water vapor permeability can also be obtained. The soybean oil wax also has the advantage that it can be produced in a tasteless and odorless quality.

A wax based on a vegetable oil, which has a melting point above 40 ° C., preferably above 50 ° C., particularly preferably above 60 ° C., is preferred as a barrier material and / or as a component of a barrier layer in a recording material according to the invention. It has been shown that when using waxes with a melting point of over 20 ° C, very good results can be obtained. However, it was also possible to show that when using waxes with a melting point of over 40 ° C., the resistance of a barrier layer or a recording material containing it to mechanical stress can be increased. This resistance is increased even further at even higher melting points of the waxes. If a recording material according to the invention is also to be used at higher temperatures, it may be useful to use a wax based on a vegetable oil with a correspondingly higher melting point.

According to the invention, a recording material is preferred, the mass fraction of the wax based on a vegetable oil in the barrier layer being 6 to 98%, preferably 20 to 90%, particularly preferably 50 to 89%, based on the total mass of the barrier layer. Our own studies have surprisingly shown that with a corresponding wax mass fraction of less than 6%, the barrier properties against fat, oil and moisture decrease disproportionately, while with a corresponding wax mass fraction of over 98%, excellent barrier properties can be obtained, but the mechanical resistance of the or a barrier layer decreases disproportionately. A particularly good compromise between barrier and mechanical properties can be obtained in many cases if the corresponding wax mass fraction of the barrier layer is in the range from 50 to 89%.

In the context of the present invention, a synthetic wax suitable as a barrier material and / or as a component of a barrier layer is preferably a wax based on saturated hydrocarbons. A synthetic wax particularly preferably comprises or consists in the context of the present invention of one, two, three or more than three alkanes, preferably selected from the group consisting of heneicosane, docosane, tricosane, tetracosane, pentacosane, hexacosane, heptacosane, octacosane, nonacosane, Triacontane, hentriacontane, dotriacontane, tritriacontane, tetratriacontane, pentatriacontane, hexatriacontane, heptatriacontane, octatriacontane and nonatriacontane, particularly preferably selected from the group consisting of hexacosane, heptacosane, octacosane, nonacosane and triacontane. According to the invention, a wax comprising or consisting of octacosane is particularly preferably used as the synthetic wax. A synthetic wax, for example in the form of a wax emulsion, for example in the form of a commercially available wax emulsion, can be contained in a barrier layer coating composition or in a barrier screed.

A synthetic wax which has a melting point above 40.degree. C., preferably above 50.degree. C., particularly preferably above 60.degree. C., is preferred as the barrier material and / or as a component of a barrier layer in a recording material according to the invention. It has been shown that when using synthetic waxes with a melting point of over 30 C, very good results can be obtained. However, it has also been shown that the use of synthetic waxes with a melting point of over 40 ° C can increase the resistance to mechanical stress. This resistance is increased even further at even higher melting points of the waxes. If a recording material according to the invention is also to be used at higher temperatures, it can make sense to use a synthetic wax based on a vegetable oil with a correspondingly higher melting point.

According to the invention, a recording material is preferred, the mass fraction of the synthetic wax in the or a barrier layer in the range from 5 to 60%, preferably from 15 to 50%, particularly preferably from 20 to 40%, based on the total mass of the or a Barrier layer.

It has been shown that with a corresponding wax mass fraction of less than 5%, the barrier properties against fat, oil and moisture decrease disproportionately, while with a corresponding wax mass fraction of over 60%, excellent barrier properties can be obtained, but the mechanical resistance of the one Barrier layer decreases disproportionately. It has also been found that particularly good recording materials with excellent barrier and mechanical properties can be obtained if the wax mass fraction of the or a barrier layer is in the range from 20 to 40%.

In the context of the present invention, a vegetable oil suitable as a barrier material and / or as a component of a barrier layer is preferably understood to mean a vegetable oil (as defined above) which is selected from the list consisting of palm oil, coconut oil, poppy seed oil, olive oil, linseed oil, soybean oil , Sunflower oil, safflower oil, rapeseed oil and their mixtures. The vegetable oil suitable as a barrier material and / or as a component of a barrier layer is particularly preferably sunflower oil, soybean oil, palm oil and / or rapeseed oil.

In a preferred variant of the present invention, the or a vegetable oil can be at least partially covered with a polymer or used encased in a polymer. Such a partial covering and / or wrapping (which is also referred to as core-shell particles) can for example be described in the document WO 2008/014903 A1 described method are generated. For example, the corresponding polymer is a copolymer of styrene and maleic anhydride derivatives. The polymer preferably contains a maleimide group and is preferably formed by a copolymer with maleimide groups, in particular a copolymer of styrene and maleic anhydride derivatives. This abovementioned partial covering and / or wrapping can alternatively also according to the one in the document WO 2011/110498 A1 described method are generated.

In the context of the present invention, an inorganic pigment suitable as a barrier material and / or as a component of a barrier layer is preferably selected from the group consisting of calcined kaolin, kaolin, kaolinite, magnesium silicate hydrate, silicon oxide, bentonite, calcium carbonate, calcium silicate hydrates (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulphate (preferably according to CAS No. 12004-14-7), aluminum hydroxide, aluminum oxide and boehmite.

An abovementioned inorganic pigment is particularly preferred as a barrier material and / or as a component of a barrier layer, which is shaped like a plate. It has been shown that the use of flake-form pigments leads to particularly good barrier properties. When using platelet-shaped pigments in a barrier layer, the individual platelets of the pigment are apparently offset one on top of the other, so that a dense layer structure with a high barrier effect arises. Pigments that are not in the form of platelets do not form these layer structures. Platelet-shaped (also referred to as “flake-shaped” or “flake-like”) are understood to mean particles which have a significantly larger diameter than thickness. It is particularly preferred according to the invention if the flake-form pigment has a (preferably average) aspect ratio of 5 to 100, preferably 15 to 100, more preferably 20 to 80. In the aspect ratio (also “aspect ratio” or “shape factor”) “Called) is the quotient between the diameter and the thickness of the platelet of the inorganic pigment before it is mixed with the other components. An aspect ratio of 15 means that the diameter of the plate is 15 times larger than the thickness of the plate.

In the context of the present invention, a pigment suitable as a barrier material and / or as a component of a barrier layer is in many cases an organic pigment, an inorganic pigment (as defined above) or a mixture of an organic pigment and an inorganic pigment.

In the context of the present invention, a crosslinked polysaccharide suitable as a barrier material and / or as a component of a barrier layer is preferably understood to mean a crosslinked xylan, particularly preferably a crosslinked arabinoxylan.

According to the invention, a recording material is particularly preferred, the xylan being a xylan from wheat and / or barley husks. Even if xylans from other vegetable sources are also very suitable, it has been shown that xylans from wheat and / or barley husks when used in the or a barrier layer have a particularly good barrier effect against oxygen.

A recording material according to the invention is preferred in which the crosslinked polysaccharide comprises or is a mixture of crosslinked starch and crosslinked xylan. It is particularly preferred if a mixture of starch and xylan (preferably arabinoxylan) is crosslinked, so that crosslinking also takes place between starch and xylan molecules. It is particularly preferred here if more starch than xylan is used, i. E. the starch content in the or a barrier layer is higher than the xylan content. When considering the proportion of starch and the proportion of xylan, reference is made to the respective mass proportions before crosslinking. If necessary - if the proportions already have to be determined for a crosslinked product - a corresponding calculation of the proportions originally present is carried out based on the certain proportion of D-glucose and D-xylose, which can be determined, for example, with the aid of nuclear magnetic resonance spectroscopy (NMR).

It has also been shown that a recording material according to the invention which comprises a first and a second barrier layer, one of these barrier layers comprising a polysaccharide, has particularly good properties when the polysaccharide is crosslinked in its barrier layer. If polysaccharides that are not crosslinked are used in a first barrier layer, the first barrier layer (comprising the non-crosslinked polysaccharide) may dissolve or dissolve when the second barrier layer is applied. After the first barrier layer or the polysaccharides in the first barrier layer have dissolved or partially dissolved, undesired mixing of the polysaccharides with the components of the second barrier layer would then take place. As a result, barrier papers would be obtained which had no distinct first and second barrier layers and had impaired barrier properties (in particular with regard to the barrier effect against gases (in particular oxygen).

According to the invention, crosslinked polysaccharides are preferably used in which the crosslinking of the polysaccharide took place with a crosslinking agent selected from the group consisting of zirconium carbonate, polyamidaminepichlorohydrin resins, boric acid, ammonium zirconium carbonate, methacrylate polymer, diacarboxylic acid, adipic acid, glutaric acid glyoxal, dihydroxy to titanium (IV ) (CAS No. 65104-06-5; Tyzor LA) and glyoxal derivatives, preferably the crosslinking agent is a glyoxal or a glyoxal derivative. It is preferred according to the invention if the crosslinking was carried out by adding the crosslinking agent in a mass fraction of 0.05 to 1%, preferably 0.1 to 0.45%, more preferably 0.35 to 0.425%, based on the total mass of all polysaccharides in the corresponding barrier layer.

• cb) eine unter der ersten Barriereschicht (30) angeordnete zweite Barriereschicht (31), umfassend mindestens ein Barrierematerial ausgewählt aus der Gruppe bestehend aus
  • - polymere Bindemittel, ausgewählt aus der Gruppe bestehend aus
  • - Polyacrylate,
  • - Polymethacrylate,
  • - Acrylat-Copolymere wobei vorzugsweise deren Monomere jeweils unabhängig voneinander ausgewählt sind aus der Gruppe bestehend aus Acrylsäurealkylester, Methacrylsäurealkylester, Acrylnitril, Methacrylnitril, Styrol, α-Methylstyrol und deren Gemische,
  • - Polystyrole,
  • - Polybutadiene,
  • - Polyacrylnitrile,
  • - Polyethylene und
  • - deren Gemische,
  • - natürliche Wachse, vorzugsweise Wachse auf der Basis pflanzlicher Öle, besonders bevorzugt Wachse gewonnen durch chemische Modifikation pflanzlicher Öle,
  • - synthetische Wachse, vorzugsweise Wachse umfassend ein oder mehrere gesättigte Kohlenwasserstoffe,
  • - pflanzliche Öle,
  • - organische Pigmente,
  • - anorganische Pigmente,
  • - vernetzte Polysaccharide, vorzugsweise ein vernetztes Xylan und
  • - deren Mischungen,
  wobei vorzugsweise
  • - die zweite Barriereschicht (31), vorzugsweise vollflächig, auf der ersten Barriereschicht (30), angeordnet und in Kontakt mit dieser ist und/oder
  • - das mindestens eine Barrierematerial der zweiten Barriereschicht (31) verschieden ist von dem mindestens einen Barrierematerial der ersten Barriereschicht (30).

A recording material according to the invention specified above is also preferred ( 1 ) (or a recording material according to the invention indicated as preferred in this text), the recording material comprising as an additional layer:

• cb) one under the first barrier layer ( 30th ) arranged second barrier layer ( 31 ), comprising at least one barrier material selected from the group consisting of
  • - polymeric binders selected from the group consisting of
  • - polyacrylates,
  • - polymethacrylates,
  • - Acrylate copolymers, preferably their monomers are each independently selected from the group consisting of acrylic acid alkyl ester, methacrylic acid alkyl ester, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and mixtures thereof,
  • - polystyrene,
  • - polybutadienes,
  • - polyacrylonitrile,
  • - Polyethylene and
  • - their mixtures,
  • - natural waxes, preferably waxes based on vegetable oils, particularly preferably waxes obtained by chemical modification of vegetable oils,
  • - synthetic waxes, preferably waxes comprising one or more saturated hydrocarbons,
  • - vegetable oils,
  • - organic pigments,
  • - inorganic pigments,
  • - crosslinked polysaccharides, preferably a crosslinked xylan and
  • - their mixtures,
  being preferably
  • - the second barrier layer ( 31 ), preferably over the entire surface, on the first barrier layer ( 30th ), arranged and in contact with this and / or
  • - the at least one barrier material of the second barrier layer ( 31 ) is different from the at least one barrier material of the first barrier layer ( 30th ).

In the aforementioned case, the person skilled in the art selects a combination of the first and second barrier layers in such a way that there is no mutual impairment (e.g. loosening of the first barrier layer when the second barrier layer is applied), but in such a way that an improved or combined barrier effect (opposite can or forms only a first barrier layer).

• - einer Barriereschicht oder einem Barrierestrich, der auf der ersten Trägerschicht, oder, sofern eine zweite Trägerschicht vorhanden ist, auf der zweiten Trägerschicht, vollflächig aufgebracht ist, wobei das Auftragsgewicht des Barrierestrichs einen Masseanteil von weniger als oder gleich 5 % aufweist, bezogen auf die Gesamtmasse der ersten bzw. der zweiten Trägerschicht, wobei vorzugsweise die erste bzw. die zweite Trägerschicht ein Papiersubstrat ist und das Auftragsgewicht des Barrierestrichs einen Masseanteil von weniger als oder gleich 5 % aufweist, bezogen auf die Gesamtmasse des Papiersubstrats (lutro);
• - einer Barriereschicht oder einem Barrierestrich umfassend oder bestehend aus einem polymeren Bindemittel und einem Wachs, vorzugsweise einem Wachs auf Basis eines pflanzlichen Öls,
• - einer Barriereschicht oder einem Barrierestrich umfassend oder bestehend aus einem polymeren Bindemittel und mindestens einem Wachs und/oder mindestens einem, vorzugsweise verkapselten, pflanzlichen Öl,
• - einer Barriereschicht oder einem Barrierestrich umfassend oder bestehend aus
• - einem Acrylat-Copolymer und/oder
• - einem Wachs, vorzugsweise einem Wachs auf Basis eines pflanzlichen Öls (besonders bevorzugt einem Wachs gewonnen durch chemische Modifikation eines pflanzlichen Öls) und/oder einem synthetischen Wachs; besonders bevorzugt umfassend oder bestehend aus einer, zwei, oder sämtlichen Komponenten a) bis c):
  1. a) einem Acrylat-Copolymer mit einer mittleren molaren Masse im Bereich von 50.000 bis 150.000 g/mol, wobei das Acrylat-Copolymer aus zwei, drei, vier, fünf, sechs oder sieben Monomeren hergestellt wurde ausgewählt aus der Gruppe bestehend aus Acrylsäuremethylester, Methacrylsäuremethylester, Acrylsäurebutylester, Methacrylsäurebutylester, Acrylsäure-2-ethylhexylester, Methacrylsäure-2-ethylhexylester und Styrol;
  2. b) einem Wachs auf Basis eines pflanzlichen Öls; vorzugsweise einem Wachs gewonnen durch chemische Modifikation eines pflanzlichen Öls,
  3. c) einem Wachs auf Basis gesättigter Kohlenwasserstoffe, wobei das Wachs auf Basis gesättigter Kohlenwasserstoffe vorzugsweise Octacosan umfasst oder Octacosan ist;
     • - einer Barriereschicht oder einem Barrierestrich umfassend oder bestehend aus mindestens einem Bindemittel und mindestens einem Pigment, vorzugsweise mindestens einem anorganischen Pigment;
     • - einer Barriereschicht oder einem Barrierestrich umfassend oder bestehend aus einem vernetzten Polysaccharid, vorzugsweise umfassend oder bestehend aus einem vernetzten Xylan;

wobei vorzugsweise die erste Barriereschicht (30) und die gegebenenfalls vorhandene zweite Barriereschicht (31) verschieden sind.A recording material according to the invention specified above ( 1 ) (or a recording material according to the invention specified as preferred in this text) is likewise preferred, the first barrier layer ( 30th ) and / or, if a second barrier layer ( 31 ) is present, the second barrier layer is selected or are from the group consisting of

• - A barrier layer or a barrier screed, which is applied over the entire surface on the first carrier layer or, if a second carrier layer is present, on the second carrier layer, the application weight of the barrier screed having a mass fraction of less than or equal to 5%, based on the Total mass of the first and the second carrier layer, the first and the second carrier layer preferably being a paper substrate and the application weight of the barrier screed having a mass fraction of less than or equal to 5%, based on the total mass of the paper substrate (lutro);
• - A barrier layer or a barrier screed comprising or consisting of a polymeric binder and a wax, preferably a wax based on a vegetable oil,
• - a barrier layer or a barrier screed comprising or consisting of a polymeric binder and at least one wax and / or at least one, preferably encapsulated, vegetable oil,
• - A barrier layer or a barrier screed comprising or consisting of
• - an acrylate copolymer and / or
• a wax, preferably a wax based on a vegetable oil (particularly preferably a wax obtained by chemical modification of a vegetable oil) and / or a synthetic wax; particularly preferably comprising or consisting of one, two or all components a) to c):
  1. a) an acrylate copolymer with an average molar mass in the range from 50,000 to 150,000 g / mol, the acrylate copolymer being produced from two, three, four, five, six or seven monomers selected from the group consisting of methyl acrylate and methyl methacrylate , Butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate and styrene;
  2. b) a wax based on a vegetable oil; preferably obtained from a wax by chemical modification of a vegetable oil,
  3. c) a wax based on saturated hydrocarbons, the wax based on saturated hydrocarbons preferably comprising octacosane or being octacosane;
     • - a barrier layer or a barrier screed comprising or consisting of at least one binder and at least one pigment, preferably at least one inorganic pigment;
     • - a barrier layer or a barrier screed comprising or consisting of a crosslinked polysaccharide, preferably comprising or consisting of a crosslinked xylan;

where preferably the first barrier layer ( 30th ) and the possibly existing second barrier layer ( 31 ) are different.

In the context of the present invention, the term “barrier screed” denotes a coating (“line”) applied to a carrier substrate, preferably a paper substrate, through which the paper substrate acquires barrier properties. The barrier layer produced by the barrier screed prevents or at least considerably reduces the undesired passage of certain substances through the carrier substrate (preferably through the paper substrate). The substances whose passage through the carrier substrate is to be prevented or reduced are, in particular, mobile (e.g. pore-mobile and / or mobile due to capillary forces) hydrophilic and / or hydrophobic, possibly also amphiphilic, substances. In the context of the present invention, the term “mobile substances” preferably denotes fat and / or oil and / or water (including water vapor) and / or aromatic substances and / or odorous substances. Carrier substrates refined by one or more barrier screeds are accordingly highly fat-tight and / or water- or moisture-tight and / or aroma-tight. Corresponding barrier papers are ideally suited for food applications such as food packaging, but also for other purposes where appropriate protective properties against environmental influences are important.

In the context of the present invention, the term “barrier screed” is used synonymously with the term “barrier layer coating composition”. A paper substrate that has been refined with at least one barrier screed is also known in technical terms as “barrier paper” (a special paper).

• Eine erste wie vorstehend angegebene spezifische Variante der vorliegenden Erfindung betrifft ein erfindungsgemäßes Aufzeichnungsmaterial umfassend
• ba) eine erste Trägerschicht (20), umfassend oder bestehend aus einem Papiersubstrat und/oder
• bc) eine zweite Trägerschicht (22), umfassend oder bestehend aus einem Papiersubstrat,
  1. (i) wobei das Papiersubstrat der ersten Trägerschicht und/oder (vorzugsweise „oder“) das Papiersubstrat der zweiten Trägerschicht einen Kurzfaser-Zellstoff mit einem Schopper-Riegler-Grad von mindestens 30°SR und einen Langfaser-Zellstoff mit einem Schopper-Riegler-Grad von mindestens 25°SR aufweist bzw. aufweisen und wobei das Papiersubstrat der ersten Trägerschicht und/oder (vorzugsweise „oder“) das Papiersubstrat der zweiten Trägerschicht mindestens einen Massenanteil von 50 % Kurzfaser-Zellstoff umfasst bzw. umfassen, bezogen auf die Gesamtmasse aus Kurzfaser-Zellstoff und Langfaser-Zellstoff; und/oder
  2. (ii) wobei das Papiersubstrat der ersten Trägerschicht und/oder (vorzugsweise „oder“) das Papiersubstrat der zweiten Trägerschicht bei einem Druck (angegeben als sog. Linienlast in kN/m) von mindestens 40 kN/m und einer Temperatur von mindestens 25 °C kalandriert wurde; und/oder
  3. (iii) wobei das Papiersubstrat der ersten Trägerschicht und/oder (vorzugsweise „oder“) das Papiersubstrat der zweiten Trägerschicht auf einer oder auf beiden Seiten vollflächig mit Stärke imprägniert ist;
  und
• ca) sofern das Aufzeichnungsmaterial keine zweite Trägerschicht (22) umfasst, eine erste Barriereschicht (30) oder einen entsprechenden Barrierestrich, die bzw. der auf dem (gegebenenfalls mit Stärke imprägnierten) Papiersubstrat der ersten Trägerschicht (oder, sofern auf der ersten Trägerschicht eine Zwischenschicht (23) vorhanden ist, auf der Zwischenschicht (23)) vollflächig (vorzugsweise auf der zweiten Seite bzw. der Rückseite des Papiersubstrats der ersten Trägerschicht) aufgebracht ist, oder sofern das Aufzeichnungsmaterial eine zweite Trägerschicht (22) umfasst, eine erste Barriereschicht (30) oder einen entsprechenden Barrierestrich, die bzw. der auf dem (gegebenenfalls mit Stärke imprägnierten) Papiersubstrat der zweiten Trägerschicht (oder, sofern auf der zweiten Trägerschicht eine Zwischenschicht (23) vorhanden ist, auf der Zwischenschicht (23)) vollflächig (vorzugsweise auf der zweiten Seite bzw. der Rückseite des Papiersubstrats der zweiten Trägerschicht) aufgebracht ist, wobei jeweils das Auftragsgewicht des Barrierestrichs einen Masseanteil von weniger als oder gleich 5 % aufweist, bezogen auf die Gesamtmasse des Trägersubstrats und der Barriereschicht (lutro),

wobei vorzugsweise jeweils das Flächengewicht eines Papiersubstrates einschließlich einer Barriereschicht im Bereich von 30 bis 250 g/m² (lutro) liegt.The specific variants of the present invention specified below are preferred which use a recording material according to the invention specified above ( 1 ) (or a recording material according to the invention indicated as preferred in this text), the recording material having at least one first barrier layer ( 30th ) includes:

• A first specific variant of the present invention as indicated above relates to a recording material according to the invention comprising
• ba) a first carrier layer ( 20th ), comprising or consisting of a paper substrate and / or
• bc) a second carrier layer ( 22nd ), comprising or consisting of a paper substrate,
  1. (i) wherein the paper substrate of the first carrier layer and / or (preferably "or") the paper substrate of the second carrier layer is a short fiber pulp with a Schopper-Riegler degree of at least 30 ° SR and a long fiber pulp with a Schopper-Riegler- Degree of at least 25 ° SR and wherein the paper substrate of the first carrier layer and / or (preferably "or") the paper substrate of the second carrier layer comprises or comprise at least a mass fraction of 50% short fiber pulp, based on the total mass Short fiber pulp and long fiber pulp; and or
  2. (ii) where the paper substrate of the first carrier layer and / or (preferably “or”) the paper substrate of the second carrier layer at a pressure (specified as so-called line load in kN / m) of at least 40 kN / m and a temperature of at least 25 ° C has been calendered; and or
  3. (iii) the paper substrate of the first carrier layer and / or (preferably “or”) the paper substrate of the second carrier layer being impregnated over the entire surface with starch on one or both sides;
  and
• ca) if the recording material does not have a second carrier layer ( 22nd ) comprises a first barrier layer ( 30th ) or a corresponding barrier screed that is applied to the paper substrate (optionally impregnated with starch) of the first carrier layer (or, if there is an intermediate layer on the first carrier layer ( 23 ) is present, on the intermediate layer ( 23 )) is applied over the entire surface (preferably on the second side or the back of the paper substrate of the first carrier layer), or if the recording material has a second carrier layer ( 22nd ) comprises a first barrier layer ( 30th ) or a corresponding barrier screed that is applied to the paper substrate (optionally impregnated with starch) of the second carrier layer (or, if an intermediate layer ( 23 ) is present, on the intermediate layer ( 23 )) is applied over the entire surface (preferably on the second side or the back of the paper substrate of the second carrier layer), the application weight of the barrier screed in each case having a mass fraction of less than or equal to 5%, based on the total mass of the carrier substrate and the barrier layer (lutro ),

the weight per unit area of a paper substrate including a barrier layer preferably being in the range from 30 to 250 g / m ² (lutro).

Preferably, the or a barrier screed according to the first specific variant of the present invention described here comprises at least one of the components selected from the group consisting of poly (meth) acrylate, polyacrylate, polystyrene, polybutadiene, polyethylene, polyvinyl acetate, polyvinyl alcohol, polyacrylonitrile, polyacrylic acid ester, natural Wax, synthetic wax and mixtures of these components

It has been shown that a recording material according to the invention according to the first specific variant of the present invention described here, comprising a barrier layer as described above, has a very high resistance to fat and / or oil and / or moisture. Due to the design of the paper substrate, the calendering of the paper substrate and / or the impregnation of the paper substrate with starch, it is possible for the barrier screed to have a very high barrier effect against fat and / or oil and / or moisture despite the low application weight of the barrier screed.

A second specific variant of the present invention as indicated above relates to a recording material according to the invention comprising at least one barrier layer ( 30th ) (and / or a barrier layer ( 31 )), wherein the at least one barrier layer comprises or consists of at least one polymeric binder (as indicated or defined above as a suitable component of a barrier layer) and a wax based on a vegetable oil (as indicated or defined above).

In this variant, a wax based on an oil is preferred as the wax based on a vegetable oil, which is selected from the list comprising palm oil, coconut oil, poppy seed oil, olive oil, linseed oil, soybean oil, sunflower oil, safflower oil and rapeseed oil, particularly preferably the wax based on a vegetable oil in this variant is a wax based on a soybean oil, d. H. around soybean oil wax or soy wax.

In this variant, a crosslinked or non-crosslinked binder is preferred as the polymeric binder, selected from the group consisting of starch, polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, ethylene-vinyl acetate copolymer, silanol group-modified polyvinyl alcohol, diacetone-modified polyvinyl alcohol, modified polyethylene glycol, unmodified polyethylene glycol, α-isodecyl-ω-hydroxy-poly (oxy-1,2-ethanediyl), styrene-butadiene latex, styrene-acrylate polymers, acrylic copolymers and mixtures from this. In this variant, a polymeric binder which comprises or consists of one or more styrene-acrylate polymers is particularly preferred as the polymeric binder.

It has been shown that a recording material according to the invention according to the second specific variant specified above has a high resistance to fats and / or oils and / or moisture and can be produced at least predominantly from renewable raw materials. By using a polymeric binder, the barrier layer is surprisingly formed in such a way that it does not become detached from the carrier substrate, preferably the paper substrate, or that the wax passes onto other objects, such as food.

A third specific variant of the present invention as indicated above relates to a recording material according to the invention comprising at least one barrier layer ( 30th ) (and or ( 31 )), wherein the at least one barrier layer comprises at least one polymeric binder (as specified or defined above as a suitable component of a barrier layer) and at least one wax and / or at least one (preferably encapsulated) vegetable oil (as specified or defined above) or consists of it.

In this variant, the wax based on a vegetable oil is preferably a wax selected from the list consisting of palm oil, coconut oil, poppy seed oil, olive oil, linseed oil, soybean oil, sunflower oil, safflower oil and rapeseed oil; The wax based on a vegetable oil is preferably a wax based on a soybean oil, i. H. around soybean oil wax or soy wax. Carnauba wax is also preferred as a wax based on a vegetable oil in this variant.

It is preferred in this variant if the at least one barrier layer comprises at least one vegetable oil instead of the at least one wax or in addition to the at least one wax. A preferred vegetable oil in this variant is an oil selected from the list consisting of palm oil, coconut oil, poppy seed oil, olive oil, linseed oil, soybean oil, sunflower oil, safflower oil and rapeseed oil or a mixture thereof; the vegetable oil is preferably sunflower oil, soybean oil , Palm oil and / or rapeseed oil.

In this variant, it is also preferred if the at least one wax and / or the at least one vegetable oil is at least partially covered with a polymer or completely enveloped by this (for more details, see above).

It is also preferred in this variant if the barrier layer ( 30th ) in addition to the at least one vegetable oil comprises a wax based on saturated hydrocarbons. It has been shown that the combination of a wax based on a vegetable oil with a wax based on saturated hydrocarbons leads to particularly good resistance of a resulting barrier layer to fats and / or oils and / or moisture and / or water or water vapor. The combination of saturated hydrocarbons and waxes from fatty acid triglyceride seems to lead to layers with particularly high molecular densities. The combination of a wax based on a vegetable oil and a wax based on saturated hydrocarbons has a synergistic effect, which leads to particularly good resistance to fats and / or oils and / or moisture and / or water or water vapor. This synergistic effect is particularly pronounced when the wax based on saturated hydrocarbons is octacosan and / or the wax based on a vegetable oil is a wax based on soybean oil.

It has been shown that according to this third specific variant described here, a low water and water vapor permeability as well as a high fat and water resistance of a barrier layer can be brought about.

It has also been shown that in a recording material according to the invention the at least one barrier layer according to the third specific variant described here is particularly suitable for combination or use with an above-described paper substrate which comprises cellulose fibers, the mass fraction of cellulose fibers being 90% , based on the total mass of the paper substrate and determined as the oven-dry mass fraction; or with an above-described paper substrate which comprises cellulose fibers, wherein at least some of the cellulose fibers consist or can consist of grass fibers.

• Eine vierte wie vorstehend angegebene spezifische Variante der vorliegenden Erfindung betrifft demnach ein erfindungsgemäßes Aufzeichnungsmaterial umfassend mindestens eine erste Barriereschicht (30) und eine zweite Barriereschicht (31),
• wobei eine der beiden Barriereschichten ein vernetztes Polysaccharid (im Folgenden auch als „Polysaccharid-Schicht“ bezeichnet) umfasst und die jeweils andere der beiden Barriereschichten (im Folgenden auch als „Zweitschicht“ bezeichnet)
  • i) ein Acrylat-Copolymer und/oder
  • (ii) ein Wachs auf Basis eines pflanzlichen Öls umfasst oder daraus besteht.

The specific variants of the present invention specified below are particularly preferred which use a recording material according to the invention specified above ( 1 ) (or a recording material according to the invention indicated as preferred in this text), the recording material having at least one first barrier layer ( 30th ) and a, preferably over the entire surface, applied to the first barrier layer and in contact with this second barrier layer ( 31 ) and wherein the first and second barrier layers are each different:

• A fourth specific variant of the present invention, as indicated above, accordingly relates to a recording material according to the invention comprising at least one first barrier layer ( 30th ) and a second barrier layer ( 31 ),
• wherein one of the two barrier layers comprises a cross-linked polysaccharide (hereinafter also referred to as "polysaccharide layer") and the other of the two barrier layers (hereinafter also referred to as "second layer")
  • i) an acrylate copolymer and / or
  • (ii) comprises or consists of a wax based on a vegetable oil.

In this variant, it is preferred if the crosslinked polysaccharide is a crosslinked xylan or contains a crosslinked xylan, preferably is a crosslinked arabinoxylan or contains a crosslinked arabinoxylan. It is particularly preferred in this variant if the xylan is a xylan from wheat and / or barley husks, since these have a particularly good barrier effect against oxygen when used in a barrier layer.

It is further preferred in this variant if the crosslinked polysaccharide comprises or is a mixture of crosslinked starch and crosslinked xylan. It is particularly preferred if a mixture of starch and xylan (preferably arabinoxylan) is crosslinked, so that crosslinking also takes place between starch and xylan molecules. It is further particularly preferred if more starch than xylan is used, i. E. the starch content in the first barrier layer is higher than the xylan content. When considering the proportion of starch and the proportion of xylan, reference is made to the respective mass proportions before crosslinking. For further preferred embodiments and further advantages according to this fourth specific variant of the present invention described here, reference is made to the above explanations on crosslinked polysaccharides as barrier material which can be used according to the invention.

It has been shown that it is advantageous if a polymeric binder is also present in the second layer in addition to the wax. All binders customary in papermaking are suitable as polymeric binders which can be present in the second layer in addition to the wax. However, it has been shown that a suitable selection of the polymeric binder can significantly improve the mechanical properties of the barrier layer. It is advantageous and therefore preferred according to the invention if the polymeric binder, which can be present in the second layer in addition to the wax, is a crosslinked or uncrosslinked polymeric binder, as indicated or defined above as a suitable component of a barrier layer).

It has also been shown that it is particularly advantageous if the polymeric binder, which can be present in the second layer in addition to the wax, consists of two or more binders and at least one binder is an anionic binder. An anionic binder is understood to mean a binder which contains several negative charges which are stabilized by cations (e.g. metal cations or ammonium). Suitable anionic binders that are present in the second layer in addition to the wax are, for example, partially or completely deprotonated polyacrylic acid (or copolymers thereof, for example with acrylic acid esters), partially or completely deprotonated polymethacrylic acid (or copolymers thereof, for example with methacrylic acid esters), copolymers of polyacrylic acid esters (preferably Methyl or ethyl esters), copolymers of polymethacrylic acid esters (preferably methyl or ethyl esters) or polyacrylamides or copolymers thereof.

In this variant it is preferred if the second layer comprises or consists of one or more acrylate copolymers, preferably one or more styrene-acrylate copolymers, and a wax based on a vegetable oil, preferably a wax based on soybean oil.

It has been shown that the combination of a polysaccharide layer comprising a crosslinked polysaccharide and a second layer consisting of or comprising an acrylate copolymer, a wax based on a vegetable oil, or a mixture of acrylate copolymer and a wax based on a vegetable oil, causes a particularly low gas permeability, in particular to water vapor and oxygen, and also a particularly good barrier effect against fats, oils and water. The combination of the polysaccharide layer and the second layer has a synergistic barrier effect, which is apparently not only due to the presence of two layers or the resulting thickness of both layers.

A fifth specific variant of the present invention as indicated above relates to a recording material according to the invention comprising at least one first barrier layer ( 30th ) and a second barrier layer ( 31 ), one of the two barrier layers comprising or consisting of a polymeric binder and a pigment (hereinafter also referred to as “pigment layer”) and the other of the two barrier layers (hereinafter also referred to as “wax layer”) Comprises or consists of acrylate copolymer and a wax.

It is preferred in this variant if the wax in the wax layer comprises or is a synthetic wax. Preferred synthetic waxes in or for this variant are waxes which contain or consist of one, two, three or more than three alkanes, particularly preferably selected from the group consisting of heneicosane, docosane, tricosane, tetracosane, pentacosane, hexacosane, heptacosane, Octacosane, nonacosane, triacontane, hentriacontane, dotriacontane, tritriacontane, tetratriacontane, pentatriacontane, hexatriacontane, heptatriacontane, octatriacontane and nonatriacontane, very particularly preferably selected from the group consisting of hexacosane, heptacosane, octacosane, and triacosane. Octacosan-based wax is preferred for this variant.

In this variant, an acrylate copolymer is preferred as the acrylate copolymer in the wax layer, which was produced from methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate and / or styrene, as it is particularly has good barrier properties and is particularly compatible with the wax or in particular with the synthetic wax based on saturated hydrocarbons. In addition to the aforementioned monomers, further monomers may have been used to produce the acrylate copolymer or the copolymer was preferably produced from two, three, four, five, six or all of the monomers selected from the group consisting of methyl acrylate, methyl methacrylate, butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylic acid, 2-ethylhexyl methacrylic acid and styrene.

In this variant, an organic pigment, an inorganic pigment or a mixture of organic pigment and inorganic pigment is preferred as the pigment in the pigment layer. In this variant, the pigment particularly preferably comprises or is an inorganic pigment selected from the list consisting of calcined kaolin, kaolin, kaolinite, magnesium silicate hydrate, silicon oxide, bentonite, calcium carbonate, calcium silicate hydrates (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate (preferably according to CAS No. 12004-14-7); Aluminum hydroxide, aluminum oxide and boehmite.

It is particularly preferred if the pigment in the pigment layer is shaped like platelets (for more details, see above).

An acrylate polymer (or a polyacrylate) or acrylate copolymer is preferred as the binder in the pigment layer, preferably an anionic acrylate polymer or an anionic acrylate copolymer. Particularly preferably, the binder in the pigment layer is or comprises a copolymer which is or is produced using one, two, three or all of the monomers selected from the group consisting of butyl methacrylate, butyl acrylate, methacrylonitrile, acrylonitrile, α-methylstyrene and styrene . Very particularly preferably, the binder in the pigment layer is or comprises a copolymer which is or is produced using butyl acrylate, acrylonitrile and styrene.

It has been shown that the combination of a pigment layer and a wax layer according to this fifth specific variant of the invention leads to extremely low water vapor permeabilities and to particularly high water and fat resistance. At the same time, a recording material according to the fifth specific variant of the present invention described here is mostly easy to recycle, since the corresponding barrier layers contain no films, in particular no plastic or aluminum films. The combination of acrylate copolymer and wax in the wax layer also means that the recording material according to the invention is preferably heat-sealable.

A recording material according to the invention specified above ( 1 ) (or a recording material according to the invention specified as preferred in this text) is likewise preferred, the first barrier layer ( 30th ) and the second barrier layer ( 31 ) are present and where the second barrier layer ( 31 ) from the first barrier layer ( 30th ) is different.

1. A) i. Bereitstellen oder Herstellen eines ersten Trägersubstrats (20), aufweisend eine erste Seite („Vorderseite“) und eine der ersten Seite gegenüberliegende zweite Seite („Rückseite“);
   • ii. Bereitstellen oder Herstellen einer ersten Druckschicht-Beschichtungszusammensetzung, umfassend mindestens ein Bindemittel und vorzugsweise mindestens ein Pigment, zur Herstellung einer bedruckbaren Aufzeichnungsschicht;
   • ii-1. vorzugsweise Bereitstellen oder Herstellen einer zweiten Druckschicht-Beschichtungszusammensetzung (und gegebenenfalls weiterer Druckschicht-Beschichtungszusammensetzungen), (jeweils) umfassend mindestens ein Bindemittel und vorzugsweise mindestens ein Pigment, zur Herstellung einer bedruckbaren Aufzeichnungsschicht,
   • iii. Aufbringen der bereitgestellten oder hergestellten ersten Druckschicht-Beschichtungszusammensetzung auf die erste Seite des ersten Trägersubstrats (20);
   • iii-1. vorzugsweise Aufbringen der bereitgestellten oder hergestellten zweiten Druckschicht-Beschichtungszusammensetzung (und gegebenenfalls weiteren Druckschicht-Beschichtungszusammensetzungen) auf die erste bzw. die vorhergehende, vorzugsweise (jeweils) getrocknete und/oder vernetzte, Drucksch icht-Beschichtungszusammensetzung;
   • iv. Ausbilden einer bedruckbaren Aufzeichnungsschicht (10) auf der ersten Seite des ersten Trägersubstrats (20), vorzugsweise durch Trocknen der aufgebrachten ersten bzw. der zuletzt aufgebrachten Druckschicht-Beschichtungszusammensetzung;
   • v. vorzugsweise Bereitstellen oder Herstellen einer Zwischenschicht-Beschichtungszusammensetzung, wobei diese Zwischenschicht-Beschichtungszusammensetzung mindestens ein Bindemittel umfasst;
   • vi. vorzugsweise Aufbringen der Zwischenschicht-Beschichtungszusammensetzung auf die zweite Seite des ersten Trägersubstrats (20);
   • vii. sofern in Schritt vi. eine Zwischenschicht-Beschichtungszusammensetzung auf die zweite Seite des ersten Trägersubstrats (20) aufgebracht wurde, Ausbilden einer Zwischenschicht (23), vorzugsweise durch Trocknen und/oder Vernetzen der Zwischenschicht-Beschichtungszusammensetzung;
   • viii. Bereitstellen oder Herstellen eines ersten Barrierestrichs (bzw. einer ersten Barriereschicht-Beschichtungszusammensetzung) umfassend mindestens ein Barrierematerial und/oder mindestens einen Barrierematerial-Vorläufer;
   • ix. Aufbringen des bereitgestellten oder hergestellten ersten Barrierestrichs (bzw. der ersten Barriereschicht-Beschichtungszusammensetzung) auf die zweite Seite des ersten Trägersubstrats (20) oder, sofern in Schritt vii. eine Zwischenschicht (23) ausgebildet wurde, auf die Zwischenschicht, und
   • x. Ausbilden einer ersten Barriereschicht (30) auf der zweiten Seite des ersten Trägersubstrats (20) oder auf der Zwischenschicht (23), vorzugsweise durch Trocknen und/oder Vernetzen des ersten Barrierestrichs (bzw. der ersten Barrieresch icht-Beschichtungszusammensetzung); oder
2. B) i. Bereitstellen oder Herstellen eines ersten Trägersubstrats (20), aufweisend eine erste Seite („Vorderseite“) und eine der ersten Seite gegenüberliegende zweite Seite („Rückseite“);
   • ii. Bereitstellen oder Herstellen einer ersten Druckschicht-Beschichtungszusammensetzung, umfassend mindestens ein Bindemittel und vorzugsweise mindestens ein Pigment, zur Herstellung einer bedruckbaren Aufzeichnungsschicht;
   • ii-1. vorzugsweise Bereitstellen oder Herstellen einer zweiten Druckschicht-Beschichtungszusammensetzung (und gegebenenfalls weiterer Druckschicht-Beschichtungszusammensetzungen), (jeweils) umfassend mindestens ein Bindemittel und vorzugsweise mindestens ein Pigment, zur Herstellung einer bedruckbaren Aufzeichnungsschicht,
   • iii. Aufbringen der bereitgestellten oder hergestellten ersten Druckschicht-Beschichtungszusammensetzung auf die erste Seite des ersten Trägersubstrats (20);
   • iii-1. vorzugsweise Aufbringen der bereitgestellten oder hergestellten zweiten Druckschicht-Beschichtungszusammensetzung (und gegebenenfalls weiterer Druckschicht-Beschichtungszusammensetzungen) auf die erste bzw. die vorhergehende, vorzugsweise (jeweils) getrocknete und/oder vernetzte, Drucksch icht-Beschichtungszusammensetzung;
   • iv. Ausbilden einer bedruckbaren Aufzeichnungsschicht (10), vorzugsweise Ausbilden einer bedruckbaren Hochglanzschicht oder einer bedruckbaren Glanzschicht, auf der ersten Seite des ersten Trägersubstrats (20), vorzugsweise durch oder umfassend das Trocknen der aufgebrachten ersten bzw. der zuletzt aufgebrachten Druckschicht-Beschichtungszusammensetzung;
   • v. Bereitstellen oder Herstellen eines zweiten Trägersubstrats (22), aufweisend eine erste Seite („Vorderseite“) und eine der ersten Seite gegenüberliegende zweite Seite („Rückseite“);
   • vi. vorzugsweise Bereitstellen oder Herstellen einer Zwischenschicht-Beschichtungszusammensetzung, wobei diese Zwischenschicht-Beschichtungszusammensetzung mindestens ein Bindemittel umfasst;
   • vii. vorzugsweise Aufbringen der Zwischenschicht-Beschichtungszusammensetzung auf die zweite Seite des zweiten Trägersubstrats (22);
   • viii. sofern in Schritt vii. eine Zwischenschicht-Beschichtungszusammensetzung auf die zweite Seite des zweiten Trägersubstrats (22) aufgebracht wurde, Ausbilden einer Zwischenschicht (23), vorzugsweise durch Trocknen und/oder Vernetzen der Zwischenschicht-Beschichtungszusammensetzung;
   • ix. Bereitstellen oder Herstellen eines ersten Barrierestrichs (bzw. einer ersten Barriereschicht-Beschichtungszusammensetzung) umfassend mindestens ein Barrierematerial und/oder mindestens einen Barrierematerial-Vorläufer;
   • x. Aufbringen des bereitgestellten oder hergestellten ersten Barrierestrichs (bzw. der ersten Barriereschicht-Beschichtungszusammensetzung) auf die zweite Seite des zweiten Trägersubstrats (22) oder, sofern in Schritt viii. eine Zwischenschicht (23) ausgebildet wurde, auf die Zwischenschicht;
   • xi. Ausbilden einer ersten Barriereschicht (30) auf der zweiten Seite des zweiten Trägersubstrats (22) oder auf der Zwischenschicht (23), vorzugsweise durch Trocknen und/oder Vernetzen des ersten Barrierestrichs (bzw. der ersten Barrieresch icht-Beschichtungszusammensetzung);
   • xii. Bereitstellen oder Herstellen eines Klebstoffes, vorzugsweise eines Schmelzklebstoffes;
   • xiii. Kontaktieren des bereitgestellten oder hergestellten Klebstoffes mit der zweiten Seite des ersten Trägersubstrats (20) und/oder mit der ersten Seite des zweiten Trägersubstrats (22);
   • xiv. Fügen der zweiten Seite des ersten Trägersubstrats (20) mit der ersten Seite des zweiten Trägersubstrats (22), wobei zwischen der zweiten Seite des ersten Trägersubstrats (20) und der ersten Seite des zweiten Trägersubstrats (22) der Klebstoff angeordnet ist; und
   • xv. Aushärten oder Aushärten lassen des Klebstoffes, vorzugsweise unter Ausbildung einer Klebeschicht (21), welche das erste Trägersubstrat mit dem zweiten Trägersubstrat verbindet.

The present invention also relates to a method for producing a recording material ( 1 ), comprising at least the following steps:

1. A) i. Provision or manufacture of a first carrier substrate ( 20th ), having a first side (“front side”) and a second side (“rear side”) opposite the first side;
   • ii. Providing or producing a first printing layer coating composition, comprising at least one binder and preferably at least one pigment, for producing a printable recording layer;
   • ii-1. preferably providing or producing a second printing layer coating composition (and optionally further printing layer coating compositions), (in each case) comprising at least one binder and preferably at least one pigment, for producing a printable recording layer,
   • iii. Applying the provided or prepared first printing layer coating composition to the first side of the first carrier substrate ( 20th );
   • iii-1. preferably applying the provided or prepared second printing layer coating composition (and optionally further printing layer coating compositions) to the first or the preceding, preferably (in each case) dried and / or crosslinked, printing layer coating composition;
   • iv. Forming a printable recording layer ( 10 ) on the first side of the first carrier substrate ( 20th ), preferably by drying the applied first or last applied print layer coating composition;
   • v. preferably providing or producing an interlayer coating composition, said interlayer coating composition comprising at least one binder;
   • vi. preferably applying the interlayer coating composition to the second side of the first carrier substrate ( 20th );
   • vii. if in step vi. an interlayer coating composition on the second side of the first support substrate ( 20th ) was applied, forming an intermediate layer ( 23 ), preferably by drying and / or crosslinking the interlayer coating composition;
   • viii. Providing or producing a first barrier screed (or a first barrier layer coating composition) comprising at least one barrier material and / or at least one barrier material precursor;
   • ix. Applying the provided or produced first barrier screed (or the first barrier layer coating composition) to the second side of the first carrier substrate ( 20th ) or, if in step vii. an intermediate layer ( 23 ) was formed on the intermediate layer, and
   • x. Formation of a first barrier layer ( 30th ) on the second side of the first carrier substrate ( 20th ) or on the intermediate layer ( 23 ), preferably by drying and / or crosslinking the first barrier screed (or the first barrier layer coating composition); or
2. B) i. Provision or manufacture of a first carrier substrate ( 20th ), having a first side (“front side”) and a second side (“rear side”) opposite the first side;
   • ii. Providing or producing a first printing layer coating composition, comprising at least one binder and preferably at least one pigment, for producing a printable recording layer;
   • ii-1. preferably providing or producing a second printing layer coating composition (and optionally further printing layer coating compositions), (in each case) comprising at least one binder and preferably at least one pigment, for producing a printable recording layer,
   • iii. Applying the provided or prepared first printing layer coating composition to the first side of the first carrier substrate ( 20th );
   • iii-1. preferably applying the provided or prepared second printing layer coating composition (and optionally further printing layer coating compositions) to the first or the preceding, preferably (in each case) dried and / or crosslinked, printing layer coating composition;
   • iv. Forming a printable recording layer ( 10 ), preferably forming a printable high-gloss layer or a printable glossy layer on the first side of the first carrier substrate ( 20th ), preferably by or comprising drying the applied first or last applied print layer coating composition;
   • v. Provision or manufacture of a second carrier substrate ( 22nd ), having a first side (“front side”) and a second side (“rear side”) opposite the first side;
   • vi. preferably providing or producing an interlayer coating composition, said interlayer coating composition comprising at least one binder;
   • vii. preferably applying the interlayer coating composition to the second side of the second carrier substrate ( 22nd );
   • viii. if in step vii. an interlayer coating composition on the second side of the second support substrate ( 22nd ) was applied, forming an intermediate layer ( 23 ), preferably by drying and / or crosslinking the interlayer coating composition;
   • ix. Providing or producing a first barrier screed (or a first barrier layer coating composition) comprising at least one barrier material and / or at least one barrier material precursor;
   • x. Applying the provided or produced first barrier screed (or the first barrier layer coating composition) to the second side of the second carrier substrate ( 22nd ) or, if in step viii. an intermediate layer ( 23 ) was formed on the intermediate layer;
   • xi. Formation of a first barrier layer ( 30th ) on the second side of the second carrier substrate ( 22nd ) or on the intermediate layer ( 23 ), preferably by drying and / or crosslinking the first barrier screed (or the first barrier layer coating composition);
   • xii. Providing or producing an adhesive, preferably a hot melt adhesive;
   • xiii. Contacting the provided or produced adhesive with the second side of the first carrier substrate ( 20th ) and / or with the first side of the second carrier substrate ( 22nd );
   • xiv. Joining the second side of the first carrier substrate ( 20th ) with the first side of the second carrier substrate ( 22nd ), whereby between the second side of the first carrier substrate ( 20th ) and the first side of the second carrier substrate ( 22nd ) the adhesive is arranged; and
   • xv. Cure or allow the adhesive to harden, preferably with the formation of an adhesive layer ( 21st ), which connects the first carrier substrate to the second carrier substrate.

With regard to preferred configurations and possible combinations of preferred configurations of the method according to the invention, the following apply to the recording material according to the invention ( 1 ) the explanations given above accordingly (if necessary in a corresponding manner) and vice versa.

In a variant of the method according to the invention specified above, only the steps specified above are carried out. In a further variant of the method according to the invention specified above, further steps are carried out in addition to the steps specified above. In yet another variant of the method according to the invention given above, the steps given above are carried out in the order given.

In the context of the present invention and in accordance with the general understanding of the person skilled in the art, in particular the person skilled in the field of paper technology, the term “coating composition” denotes paints, preferably containing or consisting of pigments or matrix pigments, binders and (mostly) additives, the layer (s) already applied to the or a surface of a carrier substrate, preferably to the or a surface of a paper substrate (paper surface), or to the or a surface of a carrier substrate, preferably to the or a surface of a paper substrate , with special coating devices for surface finishing or modification of the carrier substrate, preferably the paper substrate, are applied ("painted"). Recording materials, in particular papers, produced in this way are referred to as “coated papers”. In the context of the present invention, the term “coating composition” is therefore the generic term for all spreadable coating compositions, preparations and / or solutions for treating, modifying or refining a substrate surface, preferably a carrier substrate surface, in particular preferably a paper substrate surface. A coating slip specified above is accordingly also a coating composition for the purposes of the present invention.

With regard to an above-mentioned coating composition used in a method according to the invention for producing a recording material according to the invention, reference is made here - optionally additionally or in addition - to the preceding or following statements on the composition of the respective individual layers. Conversely, with regard to an above-mentioned layer contained in a recording material according to the invention, reference should be made here - optionally additionally or in addition - to the preceding or following statements on the composition of the respective corresponding coating compositions for their production. The corresponding coating compositions are each designed in such a way that the layers present in a recording material according to the invention result therefrom. The coating compositions are usually in the form of aqueous dispersions and contain the constituents or compounds or precursor compounds (e.g. monomers or crosslinking agents) which are present in the individual layers and which react to form the constituents.

In addition, the coating compositions can also contain additives commonly used in papermaking, such as biocides, dispersants, release agents, defoamers or thickeners, which are added to adjust the properties of the coating composition and which usually remain in the layer produced from the coating composition. Here, additives commonly used in papermaking can be used in the usual amounts.

For applying a coating composition to the carrier substrate or to a layer already present on the carrier substrate (e.g. intermediate layer or first barrier layer), the person skilled in the art knows various techniques which are referred to as "painting", for example: blade coating, coating with a film press, cast coating, Curtain coating, knife coating, air brush coating or spray coating. All of these known abovementioned painting techniques are suitable for applying the abovementioned coating compositions to a carrier substrate, preferably a paper substrate which comprises one or more precoats or intermediate coats or which also does not comprise a precoat or intermediate coat. "Cast-coated paper" is paper whose high-gloss coating (usually one-sided) is achieved by contact drying on a chrome-plated, high-gloss polished metal cylinder, for example the paper type "Supercote".

In one embodiment of the method according to the invention described above, the coating compositions used (printing layer coating composition, interlayer coating composition, barrier layer coating compositions) are each dried and / or crosslinked after their application to form the corresponding layers, before the next step of the method follows, in particular before another coat (or another coating composition) can be applied. This embodiment of the method according to the invention described above is used, for example, when the coating compositions used are applied with a device for single-layer curtain coating (a “single layer curtain coater”).

In an alternative embodiment of the above-described method according to the invention, the coating compositions used (printing layer coating composition, interlayer coating composition, barrier layer coating compositions) are applied one after the other, with the coating composition applied in each case not having to be dried and / or crosslinked before to form the corresponding layer the next step in the process follows, in particular before a further coat (or a further coating composition) can be applied. This embodiment of the method according to the invention described above is used, for example, when the coating compositions used are applied with a device for multilayer curtain coating (a “multilayer curtain coater”).

In the context of the present invention, a “barrier material precursor” is understood to mean a compound or a composition which is part of a coating composition and which is only converted into a fully effective barrier material after the coating composition has been applied to a carrier substrate or to an already applied layer. For example, certain polymeric binders, for example selected from the group consisting of polyacrylates, polymethacrylates, polystyrenes, polybutadienes, acrylate copolymers and mixtures thereof, as Barrier material precursors are used, which are converted into crosslinked polymeric binders, for example by drying and / or crosslinking, and thus develop their full effectiveness as a barrier material.

According to the invention, it is preferably that in step B) xii. provided or manufactured adhesive is an adhesive that is free of water and / or solvents.

In one embodiment of the present invention, said adhesive is a chemically curing adhesive, preferably solidification of the adhesive, i. a formation of the adhesive layer takes place by forming a polymer. According to the invention, cyanoacrylates, methyl methacrylates, unsaturated polyesters, anaerobically curing adhesives, radiation-curing adhesives, epoxy resins, polyurethanes, silicones, phenolic resins, polyimides, polysulfides, bismaeinimides, silane-modified polymers or silicones are preferred.

The adhesive layer produced using a chemically curing adhesive has a chemical composition which does not correspond to the chemical composition of the adhesive used. During the curing of the adhesive, a polymer is formed from the monomers and / or prepolymers used. For example, a cyanoacrylate adhesive hardens to form a cyanoacrylate polymer. Such adhesives and the adhesive layers formed therefrom are well known to those skilled in the art.

In a particularly preferred embodiment of the method according to the invention described above, it is that in step B) xii. provided or produced adhesive to a hot melt adhesive. This hot-melt adhesive is preferably applied before the adhesive provided or produced is contacted with the second side of the first carrier substrate ( 20th ) and / or with the first side of the second carrier substrate ( 22nd ) in step B) xiii. heated and converted into a liquid or viscous state. In step B) xv. the adhesive hardens again by cooling and an adhesive layer results.

Hot melt adhesives have the advantage that they are free of solvents and monomers and that no substances can therefore diffuse into the carrier substrates during the process according to the invention. In this way, undesired impairment of the printable recording layer and deterioration of any glossy or high-gloss layer that may be present are avoided.

According to the invention, it is preferably that in step B) xii. provided or produced adhesive is a hot melt adhesive based on polyamide, polyolefins, polyethylene, amorphous polyalphaolefins, ethylene-vinyl acetate copolymers, polyester elastomers, polyurethane elastomers, copolyamide elastomers or vinyl pyrrolidone / vinyl acetate copolymers.

According to the invention, the in step B) preferably comprises xii. provided or produced adhesive or the resulting adhesive layer has a mass fraction in the range from 90 to 100%, preferably from 92 to 99%, particularly preferably from 95 to 99% polyamide, polyolefins, polyethylene, amorphous polyalphaolefins, ethylene vinyl acetate copolymers, polyester elastomers , Polyurethane elastomers, copolyamide elastomers and / or vinyl pyrrolidone / vinyl acetate copolymers, based on the total mass of the adhesive or the adhesive layer.

A hotmelt adhesive which melts in a temperature range from 100 to 200.degree. C., preferably in a temperature range from 130 to 150.degree. C., is preferred according to the invention.

• xii-1. Schmelzen des bereitgestellten oder hergestellten Klebstoffs, vorzugsweise bei einer Temperatur von 100 bis 200 °C, besonders bevorzugt bei einer Temperatur von 130 bis 150 °C,

umfasst, wobei der Schritt B) xii-1. vor dem Schritt B) xiii. erfolgt.A method for producing a recording material of variant B) which additionally includes the step

• xii-1. Melting the adhesive provided or produced, preferably at a temperature of 100 to 200 ° C, particularly preferably at a temperature of 130 to 150 ° C,

comprises, wherein step B) xii-1. before step B) xiii. he follows.

According to the invention, it is particularly preferred here if the melted adhesive during the application (“contacting”) in step B) xiii. has a temperature in the range from 40 to 100 ° C, preferably from 50 to 80 ° C, particularly preferably from 55 to 70 ° C.

It is also particularly preferred according to the invention if the melted adhesive during the joining in step B) xiv. has a temperature in the range from 40 to 90 ° C, preferably from 50 to 85 ° C, particularly preferably from 55 to 80 ° C.

It is preferred according to the invention if the adhesive used is a hot-melt adhesive based on polyolefins, particularly preferably based on amorphous polyalphaolefins.

It has been shown that when using hotmelt adhesives based on polyolefins in the inventive method, the resulting inventive recording materials have a particularly low tendency to curl or are particularly flat.

According to the invention, it is particularly preferred if the hotmelt adhesive used is a according to the method with ring and ball DIN EN ISO 4625-1: 2006-04 certain softening point in the range from 85 to 105 ° C, preferably from 92 to 98 ° C, particularly preferably from 94 to 96 ° C.

It has been shown that hot-melt adhesives with a softening point in the above-mentioned ranges are particularly well suited to be used in a method according to the invention. If the softening point is above 105 ° C, the temperature during application (“contacting”) in step B) xiii. usually quite high. At softening temperatures below 85 ° C, there is a risk that the hot melt adhesive will soften and the layers bonded to one another will loosen. For example, when a recording material according to the invention is stored in a car parked in the sun during the summer months, the interior of the car can heat up to temperatures of up to approx. 65 ° C.

According to the invention, it is particularly preferred if the adhesive used is one from Anton Paar MCR at 140 ° C 301 Rheometer-specific viscosity in the range from 6000 to 15000 mPas, preferably in the range from 6500 to 11000 mPas, very particularly preferably in the range from 7000 to 9500 mPas.

• xiii. Kontaktieren des bereitgestellten oder hergestellten Klebstoffes mit der ersten Seite des zweiten Trägersubstrats (22).

A method according to the invention for producing a recording material of variant B) is particularly preferred in step B) xiii. is designed as follows:

• xiii. Contacting the provided or produced adhesive with the first side of the second carrier substrate ( 22nd ).

It has been shown that the application of the provided or produced adhesive to the first side of the second carrier substrate ( 22nd ) and then joining the second side of the first carrier substrate ( 20th ) with the first side of the second carrier substrate ( 22nd ), the adhesive after joining between the second side of the first carrier substrate ( 20th ) and the first side of the second carrier substrate ( 22nd ) is arranged, leads to particularly good recording materials according to the invention.

The adhesive provided or produced is preferably contacted via a cylinder.

A method according to the invention described above (or a method according to the invention specified as preferred in this text) is preferred, preferably a method for producing a recording material according to the invention according to the above-described first embodiment of the present invention (“printable high-gloss layer”) wherein the pigment of the printing layer coating composition (or the or a second printing layer coating composition) is selected from the group consisting of aluminum silicate, aluminum oxide, aluminum hydroxide, barium sulfate, bentonite, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), Calcium aluminate sulphate, (preferably according to CAS No. 12004-14-7); Diatomaceous earth, urea-formaldehyde resin, hollow sphere plastic pigments, natural kaolin, calcined kaolin, kaolinite or calcined kaolinite, kieselguhr, silica, preferably precipitated silica, magnesium silicate, magnesium carbonate, satin white, silicon oxide, talc, titanium dioxide, alumina, activated alumina and Zinc oxide.

In a particularly preferred embodiment, the pigment of the printing layer coating composition (preferably according to the first embodiment of the present invention described above) is a mixture of two, three, four or more pigments, preferably selected from the group consisting of aluminum silicate and aluminum oxide , Aluminum hydroxide, barium sulfate, bentonite, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate (preferably according to CAS- No. 12004-14-7), diatomaceous earth, urea-formaldehyde resin, hollow sphere plastic pigments, natural kaolin, calcined kaolin, kaolinite or calcined kaolinite, kieselguhr, silica, preferably precipitated silica, magnesium silicate, magnesium carbonate, satin white, silicon oxide, Talc, titanium dioxide, clay, activated clay and zinc oxide.

A method is preferred according to the invention in which the (above-described) printing layer coating composition has a mass fraction (oven-dry) of pigments (preferably as stated above) in the range from 50 to 95%, preferably from 60 to 90%, particularly preferably from 70 to 80%, based on the dry weight of the printing layer coating composition after oven drying.

It has surprisingly been found that particularly good gloss properties are obtained if the printing layer coating composition described above has a mixture of calcium carbonate and kaolin, in particular a mixture of natural calcium carbonate and natural kaolin, a mixture of precipitated calcium carbonate and natural kaolin, a mixture of natural calcium carbonate and calcined kaolin or a mixture of precipitated calcium carbonate and calcined kaolin.

A method according to the invention described above (or a method according to the invention specified as preferred in this text) is preferred, preferably a method for producing a recording material according to the invention according to the above-described first embodiment of the present invention (“printable high-gloss layer”), wherein the binder of the printing layer Coating composition (or the or a second printing layer coating composition) is selected from the group consisting of starch, polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer (also referred to as or used in this text as synonymous with "ethylene-vinyl acetate copolymer"), styrene-butadiene copolymer, mixed polymer of acrylic acid esters, biopolymer latices, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, starch, a combination of starch and Sty rol-butadiene copolymer, silanol group-modified polyvinyl alcohol, diacetone-modified polyvinyl alcohol, acrylate copolymer (including film-forming acrylic copolymers).

A combination of starch and styrene-butadiene copolymer as a binder of the printing layer coating composition is preferred according to the invention in the case of the above-described first embodiment of the present invention.

A method according to the invention described above (or a method according to the invention indicated as preferred in this text) is preferred, the or a printing layer coating composition additionally containing further additives, preferably selected from the group consisting of biocides, wet strength agents, release agents, dispersants, defoamers, optical brighteners, thickeners, waxes, shading dyes and crosslinkers.

A method according to the invention described above for producing a recording material (or a method according to the invention for producing a recording material specified as preferred in this text) according to variant B) described above is preferred, preferably a method for producing a recording material according to the invention according to the first embodiment of the above-described present invention (“printable high-gloss layer”) and / or a method for producing a recording material according to the invention according to the above-described second embodiment of the present invention (“ink-printable high-gloss layer”), wherein after the (last) print layer coating composition has been applied to the first side of the first carrier substrate (step B) iii. or B) iii-1.) a Yankee cylinder (preferably with a metallic jacket surface) on the (last applied) printing layer coating composition to form a printable high-gloss layer ( 10 ) acts (step B) iv.). According to the invention, said smoothing cylinder is preferably a polished cast coating cylinder (high-gloss cylinder) known per se, preferably a chrome cylinder. This method is also known to the person skilled in the art as the "cast-coating technique" or "cast coating" or "cast coating method".

In a preferred embodiment of the method according to the invention (variant B)), the provided or produced printing layer coating composition is first applied to the Yankee cylinder and via the Yankee cylinder to the first side of the first carrier substrate ( 20th ) applied (step B) iii. or B) iii-1). The drying then takes place in step B) iv. through the Yankee cylinder.

In a further embodiment of the method according to the invention (variant B)), the provided or produced printing layer coating composition is applied to the first side of the first carrier substrate, leveled and contacted with a heated smoothing cylinder, in particular a high-gloss cylinder, with simultaneous drying to form a high-gloss line.

It is preferred according to the invention (in particular with regard to the above-described first and the above-described second embodiment of the present invention) if the Yankee cylinder, in particular the polished cast coating cylinder, has a surface temperature in the range from 60 to 110 ° C and preferably a surface temperature in the range from 70 to 100 ° C.

It is preferred according to the invention if the joining of the second side of the first carrier substrate ( 20th ) with the first side of the second carrier substrate ( 22nd ) in step B) xiv. with a contact pressure in the range from 100 to 200 kg, preferably with a contact pressure in the range from 120 to 180 kg, particularly preferably with a contact pressure in the range from 135 to 165 kg, preferably by calendering.

If a recording material according to the invention is produced according to the above-described method according to the invention which comprises, as the printable recording layer, a printable high-gloss layer according to the above-described first embodiment of the present invention, generally only one (as described above) printing layer coating composition is used to form the printable high-gloss layer applied and optionally dried (as described above; Step A) iii. and A) iv. or steps B) iii. and B) iv.).

If a recording material according to the invention is produced according to the above-described method according to the invention which comprises, as the printable recording layer, an ink-printable high-gloss layer according to the above-described second embodiment of the present invention, as a rule at least two print-layer coating compositions are applied to form the ink-printable high-gloss layer and optionally dried, of which the second (applied later) is the printing layer coating composition (described below) for forming the ink-printable high-gloss layer (see the above-described method for producing a recording material, step B) iii. or B) iii-1. and B) iv.).

• - ein oder mehrere Pigmente vorzugsweise ausgewählt aus der Gruppe bestehend aus
  • - anorganische Pigmente, vorzugsweise ausgewählt aus der Gruppe bestehend aus natürlichem Calciumcarbonat, gefälltem Calciumcarbonat, natürlichem Kaolin, kalziniertem Kaolin, Kaolinit oder calciniertem Kaolinit, Calciumsilkathydrat (vorzugsweise hergestellt aus den Mineralien Tobermorit und/oder Xonotlit), Calciumaluminatsulfat, (vorzugsweise gemäß CAS-Nr. 12004-14-7) und Kieselsäure; und
  • - Hohlkugel-Kunststoff-Pigmenten;
• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Polyvinylalkohol, Acetoacetyl-modifiziertem Polyvinylalkohol, Carboxylgruppen-modifiziertem Polyvinylalkohol, Ethylen-Vinylalkohol-Copolymer, einer Kombination aus Polyvinylalkohol und Ethylen-Vinylalkohol-Copolymer, Silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol,
• - ein oder mehrere Erdalkali-Metallsalze, vorzugsweise umfassend ein oder mehrere Erdalkali-Chloride,
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus kationische Fixiermittel, vorzugsweise umfassend ein oder mehrere kationische Polymere auf der Basis einer wässrigen Lösung aus polyquarternärem Ammoniumchlorid; Nuancierfarbstoffe, Aufheller und Netzmittel.

The first printing layer coating composition (“precoat”) (to be applied to the first carrier substrate) according to the above-described second aspect of the present invention preferably comprises

• - One or more pigments, preferably selected from the group consisting of
  • - Inorganic pigments, preferably selected from the group consisting of natural calcium carbonate, precipitated calcium carbonate, natural kaolin, calcined kaolin, kaolinite or calcined kaolinite, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate, (preferably according to CAS no . 12004-14-7) and silica; and
  • - hollow sphere plastic pigments;
• - One or more binders, preferably selected from the group consisting of polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, silanol group-modified polyvinyl alcohol and diacetone-modified Polyvinyl alcohol,
• - One or more alkaline earth metal salts, preferably comprising one or more alkaline earth metal chlorides,
• - preferably one or more additives selected from the group consisting of cationic fixing agents, preferably comprising one or more cationic polymers based on an aqueous solution of polyquaternary ammonium chloride; Shading dyes, brighteners and wetting agents.

Preferably, the first printing layer coating composition (“precoat”) according to the above-described second embodiment of the present invention is applied by the curtain coating method, but other coating methods known per se are also possible.

• - ein oder mehrere anorganische Pigmente, vorzugsweise ausgewählt aus der Gruppe bestehend aus Aluminiumsilikat, Aluminiumoxid, Aluminiumhydroxid, Bariumsulfat, Bentonit, Böhmit, natürlichem Calciumcarbonat, gefälltem Calciumcarbonat, Calciumsilkathydrat (vorzugsweise hergestellt aus den Mineralien Tobermorit und/oder Xonotlit), Calciumaluminatsulfat, (vorzugsweise gemäß CAS-Nr. 12004-14-7) und Kieselsäure;
• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Polyvinylalkohol, Acetoacetyl-modifiziertem Polyvinylalkohol, Carboxylgruppen-modifiziertem Polyvinylalkohol, Ethylen-Vinylalkohol-Copolymer, einer Kombination aus Polyvinylalkohol und Ethylen-Vinylalkohol-Copolymer, Acrylat-Copolymer, vorzugsweise Styrol-Acrylat-Copolymer, Silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol; und
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus Ammoniumsalze, Netzmittel, Verdickungsmittel, Freisetzungsmittel („Release-Mittel“) und Vernetzungsmittel.

As a second (to be applied to the, preferably dried and / or crosslinked, first printing layer coating composition described above) printing layer coating composition (“top coat”) according to the above-described second embodiment of the present invention In the invention, any of the printing layer coating compositions described above for the first aspect of the present invention can be used. Preferably, the second printing layer coating composition according to the second aspect of the present invention described above comprises:

• - One or more inorganic pigments, preferably selected from the group consisting of aluminum silicate, aluminum oxide, aluminum hydroxide, barium sulfate, bentonite, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate, (preferably according to CAS No. 12004-14-7) and silica;
• - One or more binders, preferably selected from the group consisting of polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl-group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, acrylate copolymer, preferably styrene-acrylate Copolymer, silanol group-modified polyvinyl alcohol and diacetone-modified polyvinyl alcohol; and
• - Preferably one or more additives selected from the group consisting of ammonium salts, wetting agents, thickeners, release agents (“release agents”) and crosslinking agents.

Preferably, the second printing layer coating composition according to the above-described second aspect of the present invention is applied by the cast coating method (as described in more detail above).

If a recording material according to the invention is produced according to the above-described method according to the invention which comprises, as the printable recording layer, an ink-printable gloss layer according to the third embodiment of the present invention described above, as a rule at least two print layer coating compositions are applied to form the ink-printable gloss layer and optionally dried, of which the second (later applied, “top layer”) is the second printing layer coating composition described below for forming the ink-printable high-gloss layer (cf. the above-described method for producing a recording material: Step A) iii. or A) iii-1. and A) iv. or steps B) iii. or B) iii-1. and B) iv.). According to the invention it may be preferred in the case of the third embodiment of the present invention described above to use a coated paper substrate as the first carrier substrate, the coated paper substrate preferably being provided with a precoat comprising one or more inorganic pigments, preferably silica.

• - ein oder mehrere Pigmente vorzugsweise ausgewählt aus der Gruppe bestehend aus
  • - anorganische Pigmente, vorzugsweise ausgewählt aus der Gruppe bestehend aus natürlichem Calciumcarbonat, gefälltem Calciumcarbonat, natürlichem Kaolin, kalziniertem Kaolin, Kaolinit oder calciniertem Kaolinit, Calciumsilkathydrat (vorzugsweise hergestellt aus den Mineralien Tobermorit und/oder Xonotlit), Calciumaluminatsulfat, (vorzugsweise gemäß CAS-Nr. 12004-14-7) und Kieselsäure; und
  • - Hohlkugel-Kunststoff-Pigmenten;
• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Polyvinylalkohol, acetoacetyl-modifiziertem Polyvinylalkohol, carboxylgruppen-modifiziertem Polyvinylalkohol, Ethylen-Vinylalkohol-Copolymer, einer Kombination aus Polyvinylalkohol und Ethylen-Vinylalkohol-Copolymer, silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol, und
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus kationische Fixiermittel, vorzugsweise umfassend ein oder mehrere kationische aliphatische Polyaminverbindungen; Erdalkali-Metallsalze, vorzugsweise umfassend ein oder mehrere Erdalkali-Chloride; Nuancierfarbstoffe, Aufheller und Netzmittel.

The first printing layer coating composition (“precoat”) (to be applied to the first carrier substrate) according to the third aspect of the present invention described above preferably comprises

• - One or more pigments, preferably selected from the group consisting of
  • - Inorganic pigments, preferably selected from the group consisting of natural calcium carbonate, precipitated calcium carbonate, natural kaolin, calcined kaolin, kaolinite or calcined kaolinite, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate, (preferably in accordance with CAS no . 12004-14-7) and silica; and
  • - hollow sphere plastic pigments;
• - One or more binders, preferably selected from the group consisting of polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, silanol group-modified polyvinyl alcohol and diacetone-modified Polyvinyl alcohol, and
• - preferably one or more additives selected from the group consisting of cationic fixing agents, preferably comprising one or more cationic aliphatic polyamine compounds; Alkaline earth metal salts, preferably comprising one or more alkaline earth metal chlorides; Shading dyes, brighteners and wetting agents.

According to the third embodiment of the present invention described above, the first printing layer coating composition (“precoat”) is preferably applied by the curtain coating method, but other coating methods known per se are also possible.

• - ein oder mehrere anorganische Pigmente, vorzugsweise ausgewählt aus der Gruppe bestehend aus Aluminiumsilikat, Aluminiumoxid, Aluminiumhydroxid, Bariumsulfat, Bentonit, Böhmit, natürlichem Calciumcarbonat, gefälltem Calciumcarbonat, Calciumsilkathydrat (vorzugsweise hergestellt aus den Mineralien Tobermorit und/oder Xonotlit), Calciumaluminatsulfat, (vorzugsweise gemäß CAS-Nr. 12004-14-7) und Kieselsäure;
• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Polyvinylalkohol, acetoacetyl-modifiziertem Polyvinylalkohol, carboxylgruppen-modifiziertem Polyvinylalkohol, Ethylen-Vinylalkohol-Copolymer, einer Kombination aus Polyvinylalkohol und Ethylen-Vinylalkohol-Copolymer, Acrylat-Copolymer, vorzugsweise Styrol-Acrylat-Copolymer, silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol; und
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus Netzmittel und Freisetzungsmittel („Release-Mittel“).

As the second (to be applied to the, preferably dried and / or crosslinked, first printing layer coating composition described above) printing layer coating composition (“topcoat”) according to the third aspect of the present invention described above, one of those described above for the first aspect of the present invention can be used Printing layer coating composition can be used. Preferably, the second printing layer coating composition according to the third aspect of the present invention described above comprises:

• - One or more inorganic pigments, preferably selected from the group consisting of aluminum silicate, aluminum oxide, aluminum hydroxide, barium sulfate, bentonite, boehmite, natural calcium carbonate, precipitated calcium carbonate, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate, (preferably according to CAS No. 12004-14-7) and silica;
• - One or more binders, preferably selected from the group consisting of polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, acrylate copolymer, preferably styrene-acrylate Copolymer, silanol group-modified polyvinyl alcohol and diacetone-modified polyvinyl alcohol; and
• - preferably one or more additives selected from the group consisting of wetting agents and release agents (“release agents”).

Preferably, the second printing layer coating composition according to the third embodiment of the present invention described above is applied by the curtain coating method, but other coating methods known per se are also possible. Preferably, after application (and preferably subsequent drying and / or crosslinking), the second printing layer coating composition is then calendered in a manner known per se to produce or form the (printable) glossy layer.

If a recording material according to the invention is produced according to the above-described method according to the invention which comprises, as the printable recording layer, a matte ink-printable layer according to the fourth embodiment of the present invention described above, at least one (preferably one) print layer coating composition is applied to form the matte ink-printable layer and optionally dried.

• - ein oder mehrere anorganische Pigmente, vorzugsweise ausgewählt aus der Gruppe bestehend aus natürlichem Calciumcarbonat, gefälltem Calciumcarbonat, natürlichem Kaolin, kalziniertem Kaolin, Kaolinit oder calciniertem Kaolinit, Calciumsilkathydrat (vorzugsweise hergestellt aus den Mineralien Tobermorit und/oder Xonotlit), Calciumaluminatsulfat, (vorzugsweise gemäß CAS-Nr. 12004-14-7) und Kieselsäure;
• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Polyvinylalkohol, acetoacetyl-modifiziertem Polyvinylalkohol, carboxylgruppen-modifiziertem Polyvinylalkohol, Ethylen-Vinylalkohol-Copolymer, einer Kombination aus Polyvinylalkohol und Ethylen-Vinylalkohol-Copolymer, silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol, und
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus kationische Fixiermittel, vorzugsweise umfassend ein oder mehrere kationische aliphatische Polyaminverbindungen; Erdalkali-Metallsalze, vorzugsweise umfassend ein oder mehrere Erdalkali-Chloride; Nuancierfarbstoffe, Aufheller und Netzmittel.

The at least one printing layer coating composition (to be applied to the first carrier substrate) according to the fourth aspect of the present invention described above preferably comprises:

• - One or more inorganic pigments, preferably selected from the group consisting of natural calcium carbonate, precipitated calcium carbonate, natural kaolin, calcined kaolin, kaolinite or calcined kaolinite, calcium silicate hydrate (preferably made from the minerals tobermorite and / or xonotlite), calcium aluminate sulfate, (preferably according to CAS No. 12004-14-7) and silica;
• - One or more binders, preferably selected from the group consisting of polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, ethylene-vinyl alcohol copolymer, a combination of polyvinyl alcohol and ethylene-vinyl alcohol copolymer, silanol group-modified polyvinyl alcohol and diacetone-modified Polyvinyl alcohol, and
• - preferably one or more additives selected from the group consisting of cationic fixing agents, preferably comprising one or more cationic aliphatic polyamine compounds; Alkaline earth metal salts, preferably comprising one or more alkaline earth metal chlorides; Shading dyes, brighteners and wetting agents.

Preferably, the at least one printing layer coating composition according to the fourth aspect of the present invention described above is applied according to the Curtain coating is applied, but other coating methods known per se are also possible. In some cases it may be preferred to calender the at least one printing layer coating composition after application (and preferably subsequent drying and / or crosslinking) in a manner known per se.

If a recording material according to the invention is produced according to the method according to the invention described above, which comprises a treated inkjet layer as the printable recording layer according to the fifth embodiment of the present invention described above, at least one printing layer coating composition is applied to form the treated inkjet ink-printable layer and, if necessary dried.

• - ein oder mehrere Bindemittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Stärke, Polyvinylalkohol, Acetoacetyl-modifiziertem Polyvinylalkohol, Carboxylgruppen-modifiziertem Polyvinylalkohol, Silanolgruppen-modifiziertem Polyvinylalkohol und Diaceton-modifiziertem Polyvinylalkohol, und
• - vorzugsweise ein oder mehrere Additive, ausgewählt aus der Gruppe bestehend aus mehrwertige Metallsalze, vorzugsweise Erdalkali-Metallsalze, besonders bevorzugt umfassend ein oder mehrere Erdalkali-Chloride und kationische Fixiermittel, vorzugsweise umfassend ein oder mehrere kationische aliphatische Polyaminverbindungen.

The at least one printing layer coating composition (to be applied to the first carrier substrate) according to the fifth aspect of the present invention described above preferably comprises:

• - One or more binders, preferably selected from the group consisting of starch, polyvinyl alcohol, acetoacetyl-modified polyvinyl alcohol, carboxyl group-modified polyvinyl alcohol, silanol group-modified polyvinyl alcohol and diacetone-modified polyvinyl alcohol, and
• - Preferably one or more additives selected from the group consisting of polyvalent metal salts, preferably alkaline earth metal salts, particularly preferably comprising one or more alkaline earth metal chlorides and cationic fixing agents, preferably comprising one or more cationic aliphatic polyamine compounds.

In some cases it can be preferred if the at least one printing layer coating composition according to the fifth aspect of the present invention comprises one or more pigments, preferably inorganic pigments. Preferably, the at least one printing layer coating composition according to the fifth aspect of the present invention described above is applied as a thin film after the paper has been produced in the paper machine, preferably using a film press known per se.

• yi. Bereitstellen oder Herstellen eines zweiten Barrierestrichs (bzw. einer zweiten Barriereschicht-Beschichtungszusammensetzung) umfassend mindestens ein Barrierematerial und/oder mindestens einen Barrierematerial-Vorläufer, wobei vorzugsweise das mindestens eine Barrierematerial und/oder der mindestens eine Barrierematerial-Vorläufer des zweiten Barrierestrichs (bzw. der zweiten Barriereschicht-Beschichtungszusammensetzung) jeweils verschieden ist von dem in Schritt A) v. bzw. von dem in Schritt B) ix. jeweils eingesetzten mindestens einem Barrierematerial und/oder dem mindestens einen Barrierematerial-Vorläufer des ersten Barrierestrichs (bzw. der ersten Barriereschicht-Beschichtungszusammensetzung);
• yii. Aufbringen des bereitgestellten oder hergestellten zweiten Barrierestrichs (bzw. der zweiten Barriereschicht-Beschichtungszusammensetzung) auf die erste Barriereschicht (30); und
• yiii. Ausbilden einer zweiten Barriereschicht (31) auf der ersten Barriereschicht (30), vorzugsweise durch Trocknen und/oder Vernetzen des zweiten Barrierestrichs (bzw. der zweiten Barriereschicht-Beschichtungszusammensetzung),

wobei vorzugsweise die Schritte yi. bis yiii. nach dem Schritt A) vii. bzw. nach dem Schritt B) xi. ausgeführt werden.A method according to the invention specified above for producing a recording material (or a method according to the invention which is stated as preferred in this text for producing a recording material) is likewise preferred, additionally comprising the steps:

• yi. Providing or producing a second barrier screed (or a second barrier layer coating composition) comprising at least one barrier material and / or at least one barrier material precursor, wherein preferably the at least one barrier material and / or the at least one barrier material precursor of the second barrier screed (or the second barrier layer coating composition) is in each case different from that in step A) v. or from that in step B) ix. in each case used at least one barrier material and / or the at least one barrier material precursor of the first barrier screed (or of the first barrier layer coating composition);
• yii. Applying the provided or produced second barrier screed (or the second barrier layer coating composition) to the first barrier layer ( 30th ); and
• yiii. Formation of a second barrier layer ( 31 ) on the first barrier layer ( 30th ), preferably by drying and / or crosslinking the second barrier screed (or the second barrier layer coating composition),

wherein preferably steps yi. to yiii. after step A) vii. or after step B) xi. are executed.

• - Herstellen oder Bereitstellen eines Mehrschichtverbundes aus einer Metallschicht (11), einer Trennschicht und einer Trägerschicht,
• - Herstellen oder Bereitstellen eines ersten Trägersubstrates (20), aufweisend eine Vorderseite und eine der Vorderseite gegenüberliegende Rückseite,
• - Beschichten der Vorderseite des ersten Trägersubstrates (20) und/oder der Metallschicht (11) des Mehrschichtverbundes mit einem Klebstoff (12),
• - Aufkaschieren des ggf. mit dem Klebstoff (12) beschichteten Mehrschichtverbundes auf das hergestellte oder bereitgestellte, ggf. mit dem Klebstoff (12) beschichtete, ersten Trägersubstrates (20), sodass der Klebstoff (12) zwischen der Vorderseite ersten Trägersubstrates (20) und der Metallschicht (11) angeordnet ist,
• - vorzugsweise teilweises oder vollständiges Trocknen bzw. Aushärten des Klebstoffes (12), sodass eine Klebstoffschicht (12) resultiert,
• - Entfernen der Trägerschicht und der Trennschicht,
• - Corona-Behandlung der Metallschicht (11),
• - Herstellen oder Bereitstellen einer Beschichtungszusammensetzung zur Herstellung einer bedruckbaren Aufzeichnungsschicht (10), vorzugsweise einer tintenaufnahmefähigen Schicht (10),
• - Auftragen der hergestellten oder bereitgestellten Beschichtungszusammensetzung auf die Metallschicht (11),
• - Trocknen der aufgebrachten Beschichtungszusammensetzung, sodass eine bedruckbare Aufzeichnungsschicht (10), vorzugsweise eine tintenaufnahmefähige Schicht (10), ausgebildet wird.

Another aspect of the present invention relates to a method for producing a recording material according to the invention ( 1 ) comprising a metal layer ( 11 ), comprising the following steps:

• - Production or provision of a multi-layer composite from a metal layer ( 11 ), a separating layer and a carrier layer,
• - Production or provision of a first carrier substrate ( 20th ), having a front side and a rear side opposite the front side,
• - Coating the front of the first carrier substrate ( 20th ) and / or the metal layer ( 11 ) of the multilayer composite with an adhesive ( 12th ),
• - Laminating the, if necessary, with the adhesive ( 12th ) coated multilayer composite on the manufactured or provided, possibly with the adhesive ( 12th ) coated, first carrier substrate ( 20th ) so that the adhesive ( 12th ) between the front of the first carrier substrate ( 20th ) and the metal layer ( 11 ) is arranged,
• - preferably partial or complete drying or hardening of the adhesive ( 12th ) so that an adhesive layer ( 12th ) results,
• - Removal of the carrier layer and the separating layer,
• - Corona treatment of the metal layer ( 11 ),
• - producing or providing a coating composition for producing a printable recording layer ( 10 ), preferably an ink-receptive layer ( 10 ),
• - Application of the prepared or provided coating composition to the metal layer ( 11 ),
• - Drying the applied coating composition so that a printable recording layer ( 10 ), preferably an ink-receptive layer ( 10 ), is trained.

• - Herstellen oder Bereitstellen ersten Trägersubstrates (20), aufweisend eine Vorderseite und eine der Vorderseite gegenüberliegende Rückseite,
• - Beschichten der Vorderseite des hergestellten oder bereitgestellten ersten Trägersubstrates (20) mit einer Metallschicht (11) durch physikalische Gasphasenabscheidung,
• - Herstellen oder Bereitstellen einer Beschichtungszusammensetzung zur Herstellung einer bedruckbaren Aufzeichnungsschicht (10), vorzugsweise einer tintenaufnahmefähigen Schicht (10),
• - Auftragen der hergestellten oder bereitgestellten Beschichtungszusammensetzung auf die Metallschicht (11),
• - Trocknen der aufgebrachten Beschichtungszusammensetzung, sodass eine bedruckbare Aufzeichnungsschicht (10), vorzugsweise eine tintenaufnahmefähige Schicht (10), ausgebildet wird.

Another aspect of the present invention relates to an alternative method for producing a recording material according to the invention comprising a metal layer ( 11 ), comprising the following steps:

• - Production or provision of the first carrier substrate ( 20th ), having a front side and a rear side opposite the front side,
• - Coating of the front side of the manufactured or provided first carrier substrate ( 20th ) with a metal layer ( 11 ) through physical vapor deposition,
• - producing or providing a coating composition for producing a printable recording layer ( 10 ), preferably an ink-receptive layer ( 10 ),
• - Application of the prepared or provided coating composition to the metal layer ( 11 ),
• - Drying the applied coating composition so that a printable recording layer ( 10 ), preferably an ink-receptive layer ( 10 ), is trained.

In the context of the present invention, physical vapor deposition and, as is customary in the field (English physical vapor deposition, "PVD") are understood to mean a process in which a metal is converted into the gas phase with the aid of physical processes and then to the substrate to be coated ( 10 ) where the metal condenses and the metal layer ( 11 ) forms.

A method according to the invention as described above for producing a recording material according to the invention comprising a metal layer ( 11 ), whereby the metal layer ( 11 ) is an aluminum layer, copper layer, gold layer or silver layer, preferably an aluminum layer.

Also preferred is a method according to the invention as described above for producing a recording material according to the invention comprising a metal layer ( 11 ), wherein the coating composition is applied using a curtain coating method, a roll transfer method, or a gravure printing method. According to the invention, it is preferred to apply the coating composition with the aid of a gravure printing process. In the gravure printing process, the coating composition is applied to a steel roller etched with a grid. Then this is covered with a metal layer ( 11 ) provided first carrier substrate ( 20th ), which has undergone corona treatment, is pressed against this steel roller with a roller, and the coating composition is transferred. The coating composition is rubbed in by the different speeds of the rollers, so that the grid of the steel roller disappears and an even application is created.

• bc) ein Papiersubstrat als Trägerschicht (22);
• bd) vorzugsweise eine Zwischenschicht (23) umfassend mindestens ein Bindemittel und
• ca) eine erste Barriereschicht (30), umfassend mindestens ein Barrierematerial ausgewählt aus der Gruppe bestehend aus
  • - polymere Bindemittel, ausgewählt aus der Gruppe bestehend aus
    • - Polyacrylate,
    • - Polymethacrylate,
    • - Acrylat-Copolymere, wobei vorzugsweise deren Monomere jeweils unabhängig voneinander ausgewählt sind aus der Gruppe bestehend aus Acrylsäurealkylester, Methacrylsäurealkylester, Acrylnitril, Methacrylnitril, Styrol, α-Methylstyrol und deren Gemische,
    • - Polystyrole,
    • - Polybutadiene,
    • - Polyacrylnitrile,
    • - Polyethylene und
    • - deren Gemische,
  • - natürliche Wachse,
  • - synthetische Wachse,
  • - pflanzliche Öle,
  • - organische Pigmente,
  • - anorganische Pigmente,
  • - vernetzte Polysaccharide, und
  • - deren Mischungen,

wobei die Schichten in der Reihenfolge bc), sofern vorhanden bd), und ca) angeordnet sind,
zur Herstellung eines bedruckbaren Aufzeichnungsmaterials als mehrschichtiges Verbundmaterial mit Barrierefunktion, mindestens umfassend (d.h.: wobei das bedruckbare Aufzeichnungsmaterial als mehrschichtiges Verbundmaterial mit Barrierefunktion mindestens umfasst):

• - eine bedruckbare Hochglanzschicht (10), welche einen Glanzwert aufweist von ≥ 40 %, besonders bevorzugt von ≥ 45 %, mehr bevorzugt von ≥ 50 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 20°, oder
• - eine tintenbedruckbare Hochglanzschicht (10), welche einen Glanzwert aufweist von ≥ 40 %, besonders bevorzugt von ≥ 45 %, mehr bevorzugt von ≥ 50 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 60°, oder
• - eine tintenbedruckbare Glanzschicht (10), welche einen Glanzwert aufweist von ≥ 20 %, besonders bevorzugt von ≥ 25 %, gemessen nach DIN EN ISO 2813:2015-02 bei einem spezifischen Messwinkel von 60°, und vorzugsweise umfassend eine Klebeschicht (21).

The present invention also relates to the use of a barrier paper, at least comprising the following layers:

• bc) a paper substrate as a carrier layer ( 22nd );
• bd) preferably an intermediate layer ( 23 ) comprising at least one binder and
• ca) a first barrier layer ( 30th ), comprising at least one barrier material selected from the group consisting of
  • - polymeric binders selected from the group consisting of
    • - polyacrylates,
    • - polymethacrylates,
    • - Acrylate copolymers, preferably their monomers are each independently selected from the group consisting of acrylic acid alkyl ester, methacrylic acid alkyl ester, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and mixtures thereof,
    • - polystyrene,
    • - polybutadienes,
    • - polyacrylonitrile,
    • - Polyethylene and
    • - their mixtures,
  • - natural waxes,
  • - synthetic waxes,
  • - vegetable oils,
  • - organic pigments,
  • - inorganic pigments,
  • - crosslinked polysaccharides, and
  • - their mixtures,

where the layers are arranged in the order bc), if present bd), and ca),
for the production of a printable recording material as a multilayer composite material with a barrier function, at least comprising (ie: wherein the printable recording material as a multilayer composite material with a barrier function at least comprises):

• - a printable high-gloss layer ( 10 ), which has a gloss value of ≥ 40%, particularly preferably ≥ 45%, more preferably ≥ 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °, or
• - an ink-printable glossy layer ( 10 ), which has a gloss value of ≥ 40%, particularly preferably ≥ 45%, more preferably ≥ 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °, or
• - an ink-printable glossy layer ( 10 ), which has a gloss value of ≥ 20%, particularly preferably ≥ 25%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °, and preferably comprising an adhesive layer ( 21st ).

With regard to preferred embodiments and possible combinations of preferred embodiments of the use of a barrier paper according to the invention, the following apply to the method according to the invention and / or to the recording material according to the invention ( 1 ) the explanations given above accordingly (if necessary in a corresponding manner) and vice versa.

• cb) eine auf der ersten Barriereschicht (30) angeordnete zweite Barriereschicht (31), umfassend mindestens ein Barrierematerial ausgewählt aus der Gruppe bestehend aus
  • - polymere Bindemittel, ausgewählt aus der Gruppe bestehend aus
    • - Polyacrylate,
    • - Polymethacrylate,
    • - Acrylat-Copolymere, wobei vorzugsweise deren Monomere jeweils unabhängig voneinander ausgewählt sind aus der Gruppe bestehend aus Acrylsäurealkylester, Methacrylsäurealkylester, Acrylnitril, Methacrylnitril, Styrol, α-Methylstyrol und deren Gemische,
    • - Polystyrole,
    • - Polybutadiene,
    • - Polyacrylnitrile,
    • - Polyethylene und
    • - deren Gemische,
  • - natürliche Wachse,
  • - synthetische Wachse,
  • - pflanzliche Öle,
  • - organische Pigmente,
  • - anorganische Pigmente,
  • - vernetzte Polysaccharide, und
  • - deren Mischungen, wobei vorzugsweise
    • - die zweite Barriereschicht vollflächig auf der ersten Barriereschicht, angeordnet und in Kontakt mit dieser ist und/oder
    • - das mindestens eine Barrierematerial der zweiten Barriereschicht verschieden ist von dem mindestens einen Barrierematerial der ersten Barriereschicht (30).

An above-mentioned use according to the invention is preferred, the barrier paper comprising as an additional layer:

• cb) one on the first barrier layer ( 30th ) arranged second barrier layer ( 31 ), comprising at least one barrier material selected from the group consisting of
  • - polymeric binders selected from the group consisting of
    • - polyacrylates,
    • - polymethacrylates,
    • - Acrylate copolymers, preferably their monomers are each independently selected from the group consisting of acrylic acid alkyl ester, methacrylic acid alkyl ester, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and mixtures thereof,
    • - polystyrene,
    • - polybutadienes,
    • - polyacrylonitrile,
    • - Polyethylene and
    • - their mixtures,
  • - natural waxes,
  • - synthetic waxes,
  • - vegetable oils,
  • - organic pigments,
  • - inorganic pigments,
  • - crosslinked polysaccharides, and
  • - their mixtures, preferably
    • the second barrier layer is arranged over the entire surface of the first barrier layer and is in contact therewith and / or
    • - the at least one barrier material of the second barrier layer is different from the at least one barrier material of the first barrier layer ( 30th ).

• - das Verpackungsmaterial ausgewählt ist aus der Gruppe bestehend aus Verpackungspapier; Einschlagmaterial, vorzugsweise Einschlagpapier; Beutel, Tüten, Sachets, Unterlegmaterial, vorzugsweise Unterlegpapier; Zwischenlegematerial, vorzugsweise Zwischenlegepapier; und Trennmaterial, vorzugsweise Trennpapier; und/oder
• - das Verpacken umfasst das Einwickeln, Einpacken, Einschlagen, Unterlegen, Zwischenlegen und/oder Trennen; und/oder
• - das Produkt ausgewählt ist aus der Gruppe bestehend aus
  • - Elektrogeräte, vorzugsweise Rundfunk- und Fernsehgeräte, Computer, Computerzubehör und mobile Endgeräte;
  • - digitale und Printmedien;
  • - optische Geräte, vorzugsweise Film- und Fotoaufzeichnungsgeräte;
  • - pharmazeutische Produkte, vorzugsweise Arzneimittel, Heilkräuter, Kräutermischungen, Kräutertees und pharmazeutische Trockenextrakte;
• - Lebensmittel, vorzugsweise ausgewählt aus der Gruppe bestehend aus Süßwaren (vorzugsweise umfassend Fruchtgummi, Weingummi, Schaumzucker, Lakritze, Kakao- und Schokoladewaren, Bonbons und Zuckerwaren, Kaugummi, Speiseeeis, vorzugsweise Eiscreme, Milchspeiseeis, Fruchteis und Sorbets), Backwaren (vorzugsweise umfassend Feingebäck), Rohmassen (vorzugsweise umfassend Marzipan, marzipanähnliche Massen wie Persipan, Nuss-Nougatmassen, Nougatkrem und Haselnussmark), gebratene Waren, frittierte Waren, Snackwaren (vorzugsweise umfassend Knabberartikel), Sandwiches, Brot, Burger, Fisch, Meeresfrüchte, Fleischwaren, Wurstwaren und Käse; und
• - Nahrungs- und Genussmittel, vorzugsweise umfassend
  • - unbehandelte Nahrungsmittel, z.B. Tierhälften, rohes Gemüse, Kartoffeln;
  • - küchenfertige Nahrungsmittel (bereits zugeschnitten bzw. portioniert und/oder filetiert, ungegart bzw. nicht fertig zubereitet), z.B. zerlegtes Fleisch, geputztes Gemüse, rohes Tiefkühlgemüse, tiefgekühlte Fischfilets, Kartoffeln im Glas, verpacktes Rührei;
  • - garfertige Nahrungsmittel (Fertiggerichte, müssen nur noch zubereitet, etwa gebraten, gekocht, frittiert oder gebacken werden), z.B. gefrorenes Spiegelei, frische Fisch- oder Fleischfilets, Reis, Nudeln, tiefgekühlte Pommes Frites, Tiefkühl-Rahmgemüse, fertigpaniertes Schnitzel, Aufbackbrötchen;
  • - misch- und/oder aufbereitungsfertige Nahrungsmittel (fertig vorbereitete oder gegarte Lebensmittel, denen weitere Zutaten hinzugefügt werden können, und die ggf. noch erwärmt werden müssen), z.B. Kartoffelpüreepulver, Tütensuppen, Instant-Nudelgerichte;
  • - zubereitungsfertige Nahrungsmittel (können direkt erhitzt und anschließend verzehrt werden), z.B. Tiefkühlfertiggerichte, Mikrowellenfertiggerichte;
  • - verzehrfertige Nahrungsmittel (direkter Verzehr nach Entfernung der Verpackung möglich), z.B. Stangen-Ei, Fertigsalate und
  • - konservierte Nahrungsmittel (z.B. tiefgefroren, gekühlt, getrocknet, sterilisiert oder pasteurisiert, konserviert, gesäuert, unter Vakuum verpackt).

Furthermore, the present invention also relates to the use of a recording material according to the invention described above ( 1 ) (or a preferred recording material according to the invention described above ( 1 )) preferably an above-described recording material according to the invention as a multilayer composite material,
as packaging material and / or for packaging a product,
being preferably

• - The packaging material is selected from the group consisting of packaging paper; Wrapping material, preferably wrapping paper; Bags, sachets, sachets, backing material, preferably backing paper; Liner material, preferably liner paper; and release material, preferably release paper; and or
• - The packaging includes wrapping, wrapping, wrapping, laying under, interposing and / or separating; and or
• - the product is selected from the group consisting of
  • - Electrical appliances, preferably radio and television sets, computers, computer accessories and mobile devices;
  • - digital and print media;
  • - optical devices, preferably film and photo recorders;
  • - pharmaceutical products, preferably pharmaceuticals, medicinal herbs, herbal mixtures, herbal teas and pharmaceutical dry extracts;
• - Food, preferably selected from the group consisting of confectionery (preferably comprising fruit gum, wine gum, foam sugar, liquorice, cocoa and chocolate goods, candies and sugar confectionery, chewing gum, ice cream, preferably ice cream, milk ice cream, fruit ice cream and sorbets), baked goods (preferably comprising pastries ), Raw masses (preferably comprising marzipan, marzipan-like masses such as persipan, nut-nougat masses, nougat cream and hazelnut pulp), fried goods, fried goods, snack goods (preferably comprising snacks), sandwiches, bread, burgers, fish, seafood, meat products, sausage products and cheese ; and
• - Food and luxury goods, preferably comprehensive
  • - untreated food, eg carcasses, raw vegetables, potatoes;
  • - Kitchen-ready food (already cut or portioned and / or filleted, uncooked or not fully prepared), e.g. cut meat, cleaned vegetables, raw frozen vegetables, frozen fish fillets, potatoes in a jar, packaged scrambled eggs;
  • - Ready-to-cook foods (ready-to-eat meals only need to be prepared, e.g. fried, boiled, deep-fried or baked), e.g. frozen fried eggs, fresh fish or meat fillets, rice, pasta, frozen French fries, frozen cream vegetables, breaded schnitzel, baked rolls;
  • - Ready-to-mix and / or ready-to-use foods (ready-made or cooked foods to which further ingredients can be added and which may still have to be heated), e.g. mashed potatoes, soups in sachets, instant noodle dishes;
  • - ready-to-prepare foods (can be heated directly and then consumed), eg frozen ready meals, microwave ready meals;
  • - Ready-to-eat foods (can be consumed directly after removing the packaging), e.g. stick eggs, ready-made salads and
  • - Preserved food (e.g. frozen, chilled, dried, sterilized or pasteurized, preserved, soured, packed under vacuum).

With regard to preferred configurations and possible combinations of preferred configurations of the use according to the invention of a recording material according to the invention, the following apply to the use according to the invention of a barrier paper, to the method according to the invention for producing a recording material and / or to the recording material according to the invention ( 1 ) the explanations given above accordingly (if necessary in a corresponding manner) and vice versa.

• - Bereitstellen eines erfindungsgemäßen Aufzeichnungsmaterials, vorzugsweise umfassend ein oder mehrere Wachse,
• - Auflegen des bereitgestellten erfindungsgemäßen Aufzeichnungsmaterials auf eine Oberfläche, sodass zumindest ein Teil der zweiten Barriereschicht auf der Oberfläche aufliegt,
• - Anpressen des auf die Oberfläche aufliegenden Aufzeichnungsmaterials unter Einwirkung von Wärme, sodass die erste und/oder die zweite Barriereschicht zumindest in dem auf der Oberfläche aufliegenden Teil bis in den schmelzflüssigen Zustand erwärmt wird,
• - Reduzieren des Anpressdruckes und der Einwirkung von Wärme, sodass die in den schmelzflüssigen Zustand gebrachte Schicht abkühlen.

Another aspect of the present invention relates to a method for heat sealing a recording material according to the invention ( 1 ) comprising the following steps:

• - providing a recording material according to the invention, preferably comprising one or more waxes,
• - placing the recording material according to the invention provided on a surface so that at least a part of the second barrier layer rests on the surface,
• - pressing the recording material resting on the surface under the action of heat, so that the first and / or the second barrier layer is heated to the molten state at least in the part resting on the surface,
• - Reduction of the contact pressure and the effect of heat so that the layer that has been brought into the molten state cools down.

Further configurations result from the exemplary embodiments explained in more detail in the figures and from the following examples.

The figures ( 1 to 5 ) show schematically possible layer structures of recording materials according to the invention:

1 shows schematically a recording material 1 , which consists of a paper substrate as the first carrier layer 20th , a printable recording layer disposed on the front side of the paper substrate 10 and a first barrier layer 30th consists. The paper substrate can comprise grass fibers and has a front side and a rear side opposite the front side. The first barrier layer is on the back of the paper substrate 30th arranged, which consists of a polymeric binder and a wax. In the case of the printable recording layer 10 it is a matte ink-printable recording layer (see fourth embodiment of the present invention described above).

2 shows schematically a recording material 1 made from a paper substrate 20th as the first carrier layer, a printable recording layer arranged on the front side of the paper substrate 10 , an intermediate layer arranged on the paper substrate (rear side) 23 ("Barrier precoat") and a first barrier layer arranged on the intermediate layer 30th consists. The paper substrate is an untreated base paper and has a front side and a rear side opposite the front side. On the intermediate layer 23 (Back) is the first barrier layer 30th arranged, which consists of a polymeric binder, a wax based on a vegetable oil and a vegetable oil. In the case of the printable recording layer 10 it is a “treated inkjet” recording layer (cf. fifth embodiment of the present invention described above).

3 shows schematically a recording material 1 made from a paper substrate 20th as the first carrier layer, one on the front of the paper substrate 20th arranged printable recording layer 10 , one on the back of the paper substrate 20th arranged adhesive layer 21st , a paper substrate 22nd as a second carrier layer, one on the paper substrate 22nd (Back) arranged intermediate layer 23 ("Barrier precoat") and a first barrier layer arranged on the intermediate layer (rear side) 30th consists. The paper substrate ( 20th , 22nd ) is an untreated base paper or one or one or two-sided surface-prepared paper on the intermediate layer 23 (Back) is the first barrier layer 30th arranged, which consists of an acrylate copolymer and a wax based on a vegetable oil. In the case of the printable recording layer 10 it is an ink-printable high-gloss layer (cf. second embodiment of the present invention described above).

4th shows schematically a recording material 1 made from a paper substrate 20th as the first carrier layer, one on the front of the paper substrate 20th arranged printable recording layer 10 , one on the back of the paper substrate 20th arranged adhesive layer 21st , a paper substrate 22nd as a second carrier layer, one on the paper substrate 22nd (Back) arranged intermediate layer 23 ("Barrier primer"), a first barrier layer arranged on the intermediate layer (rear side) 30th and a second barrier layer arranged on the first barrier layer 31 consists. The paper substrate ( 20th , 22nd ) is a base paper which is provided with a surface preparation. On the intermediate layer 23 is the first barrier layer 30th arranged, which comprises a crosslinked xylan. The second barrier layer is on top of the first barrier layer 31 arranged, which comprises an acrylate copolymer and a wax based on a vegetable oil. In the case of the printable recording layer 10 it is a printable high-gloss layer (cf. first embodiment of the present invention described above).

5 shows schematically a recording material 1 made from a paper substrate 20th as the first carrier layer, one on the front of the paper substrate 20th arranged adhesive layer (polyurethane adhesive) 12th , one on top of the adhesive layer 12th arranged metal layer 11 , an ink-receptive layer as a printable recording layer 10 , one on the back of the paper substrate 20th arranged adhesive layer 21st , a paper substrate 22nd as a second carrier layer, one on the paper substrate 22nd (Back) arranged intermediate layer 23 ("Barrier precoat"), a first barrier layer arranged on the intermediate layer 30th and a second barrier layer arranged on the first barrier layer 31 consists. The paper substrate ( 20th , 22nd ) is a base paper. On the intermediate layer 23 is the first barrier layer 30th arranged, which comprises a polymeric binder and an inorganic pigment. The second barrier layer is on top of the first barrier layer 31 arranged, which comprises an acrylate copolymer and a synthetic wax. In the case of the printable recording layer 10 it is an ink-printable glossy layer (see third embodiment of the present invention described above).

List of reference symbols

1

Recording material or recording material, preferably as a multilayer composite material (cf. in particular 3 , 4th and 5 );

10

printable recording layer;

11

Metal layer;

12

Adhesive layer;

20th

first carrier substrate;

21st

Adhesive layer;

22nd

second carrier substrate;

23

Intermediate layer;

30th

first barrier layer;

31

second barrier layer;

The following examples are intended to further explain and illustrate the invention without restricting its scope of protection:

Examples:

In paper manufacture, a distinction is made between three grades for the dryness of paper and cellulose: “atro” (absolutely dry), “lutro” (air dry) and “otro” (oven dry). The information is given in “% dry dry”, “% dry dry” and “dry dry”, where “dry dry” stands for paper or cellulose with 0% water content. For “lutro” a “normal” moisture content (which is fundamentally necessary for the paper) is used as the basis for the calculation. In the case of pulp and wood pulp, the billing mass is usually 90: 100, i.e. 90 parts fabric, 10 parts water. The state of paper or cellulose after drying under specified, defined conditions is called "oven-dry".

Example 1: Production of a first carrier substrate (20) with a printable high-gloss layer (10)

The first carrier substrate is made from bleached and ground hardwood and softwood pulps on a Fourdrinier paper machine with the addition of, based on the total solids content (dry) of the pulp fed to the paper machine, with a mass fraction of 0.8% alkylated ketene dimer glue ("AKD- Glue ”) as mass gluing, as well as other common additives, a carrier paper with a mass per unit area of 64 g / m ^{2 is} produced.

• 78-88 Massenanteile Kaolin als erstes Pigment,
• 12-22 Massenanteile Calciumcarbonat als zweites Pigment,
• 10-20 Massenanteile (bezogen auf 100 % Pigment) Styrol-Butadien-Latex als Bindemittel,
• 3-7 Massenanteile (bezogen auf 100 % Pigment) Stärke als Cobinder,
• 2-8 Massenanteile (bezogen auf 100 % Pigment) weitere Hilfsstoffe (Biozid 0,0-0,1 Massenanteile, Dispergiermittel 0,2-1 Massenanteile, Verdicker 0,15-1,5 Massenanteile, 0,1-3,0 Massenanteile Release-Mittel, 0,1-1,5 Massenanteile Aufheller/ Nuancierung) und Wasser.

On the front side of the first carrier substrate (to produce a printable high-gloss layer with a mass per unit area of 25-30 g / m ² ) using a coating unit, a printing layer coating composition is applied which has the following composition, the mass proportions of the first and the second Add 100% pigments and the stated proportions by weight of the other components relate to 100% pigment:

• 78-88 parts by mass of kaolin as the first pigment,
• 12-22 parts by mass of calcium carbonate as a second pigment,
• 10-20 parts by mass (based on 100% pigment) styrene butadiene latex as a binder,
• 3-7 parts by mass (based on 100% pigment) starch as cobinder,
• 2-8 parts by mass (based on 100% pigment) other auxiliaries (biocide 0.0-0.1 parts by mass, dispersant 0.2-1 parts by mass, thickener 0.15-1.5 parts by mass, 0.1-3.0 parts by mass Release agent, 0.1-1.5 parts by mass of brightener / nuance) and water.

After the above-mentioned printing layer coating composition has been applied, it is dried and smoothed with a smoothing cylinder at a surface temperature of 80-100 ° C. to form the printable high-gloss layer, with a value of typically> 300 Bekk / sec DIN 53107: 2016-05 (Title: Testing of paper and cardboard - determination of smoothness according to Bekk) and a gloss value of> 40%, measured according to DIN EN ISO 2813: 2015-02 is measured at a specific measuring angle of 20 ° for the gloss layer. The coated first carrier substrate produced in this way is also referred to as cast-coated paper, the high-gloss coating of which (on one side) is achieved by contact drying on chrome-plated, high-gloss polished metal cylinders, in particular smoothing cylinders. The cast coating method used here is to be understood as the so-called “direct method”, i.e. a cast coating process in which the with equalized, but still wet coated web is brought into contact with the heated surface of a high-gloss cylinder.

A carrier substrate is obtained on the first side (“front side”) of which a printable high-gloss layer is arranged.

Example 2: Production of a second carrier substrate (22) with an intermediate layer (23), a first barrier layer (30) and a second barrier layer (31)

A paper substrate is used as the second carrier substrate, which consists of a 1: 1 mixture of short fiber and long fiber pulp with a grind of 39 ° SR and an additive with a mass fraction of 1% talc as filler, based on the total mass of the paper substrate, on a paper machine a paper web provided with resin sizing in the mass and having a mass per unit area of 70 g / m ^{2 is} produced. The paper substrate produced is calendered at a line load of 80 kN / m and a temperature of 80 ° C.

Using a nozzle applicator and a doctor blade, an intermediate layer coating composition, which is in the form of an aqueous dispersion, is applied to the second side of the second carrier substrate and this coating composition is then dried using IR, air drying and drying cylinders, so that an intermediate layer with a basis weight of 10 g / m ² results. The composition of the interlayer coating composition (excluding water) is given in Table 1 below.

Using an air brush, a first barrier layer coating composition, which is present as an aqueous dispersion, is applied to the intermediate layer produced (on the second side of the second carrier substrate) and this coating composition is then dried with the aid of IR and air drying, so that a first barrier layer with a basis weight of typically 5.5 g / m ² results. The composition of the first barrier coating composition (excluding water) is also given in Table 1 below.

Using a volumetric doctor blade, a second barrier layer coating composition, which is in the form of an aqueous dispersion, is applied to the first barrier layer produced, and this coating composition is then dried using IR and air drying, so that a second barrier layer with a basis weight of typically 9.5 g / m ² results. The composition of the second barrier layer coating composition (excluding water) is also given in Table 1 below.

The resulting second carrier substrate, which comprises (in successive layers) an intermediate layer, a first barrier layer and a second barrier layer, can be heat-sealed at 120 ° C. and has a basis weight of typically 95 g / m ² . The second carrier substrate obtained in this way typically has the properties summarized in Table 2 below. Table 1: Components of the coating compositions used component Trade name component Mass fraction Interlayer coating composition (plus water): kaolin Capim NP slurry pigment 50-85 Agitan 351 Defoamer 0.1-0.5 Stabilized copolymer Acroflex 307 Rheological aid 0.1 - 1 Copolymer dispersion based on n-butyl acrylate, acrylonitrile and styrene Acronal 505 binder 10-50 First barrier layer coating composition (plus water): Nonionic surfactant mixture Metolat 700 Wetting agents 0.1-0.6 Glyoxal Glyoxal Crosslinking agents 0.1 - 1 Xylan XH 11.4 (from Seelution AB) Barrier means 90-99.5 Second barrier layer coating composition (plus water): Acrylate copolymer, containing waxy Tecryl PB 16/3 (Trüb Emulsions Chemie) Barrier means 90-100 Metolat 700 Wetting agents 0.1 - 1

Table 2: Typical properties of a second carrier substrate produced as in Example 2 value Determination method Water vapor permeability: 13.4 g / (m ^{2 *} day) DIN 53122-1 KIT value: 12th Tappi 559 Fat permeability test with palm kernel fat: Level1 DIN 53116 Fat permeability test with turpentine oil: +1800 s Tappi 454 Bekk smoothness: 15s ISO 5627

Example 3: Production of a recording material according to the invention

A commercially available hot-melt adhesive (Technomelt DM 1010 hot-melt adhesive from Henkel AG & Co. KGaA, Düsseldorf) is placed between the second side of the first carrier substrate (as produced in Example 1 above) and the first side of the second carrier substrate (as produced in Example 2 above) applied (by contacting the two carrier substrate sides with the hot melt adhesive) and the aforementioned carrier substrate sides are glued to one another over the entire surface in the usual way.

A recording material according to the invention results ( 1 ), its schematic structure in 4th is specified.

The resulting recording material according to the invention typically has a Bekk smoothness of 1100 Bekk / sec on the high-gloss layer DIN 53107: 2016-05 (Title: Testing of paper and cardboard - determination of the smoothness according to Bekk) and a gloss value of about 58%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °. The printable recording layer (printable high-gloss layer) is white. The printable high-gloss layer of the resulting recording material according to the invention can be printed very well by offset printing. The recording material according to the invention shows a high level of flatness, ie a low tendency to curl.

QUOTES INCLUDED IN THE DESCRIPTION

This list of the documents listed by the applicant was generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Patent literature cited

• DE 102014119572 A1 [0004]
• EP 3342929 A1 [0006, 0078]
• DE 69402121 T2 [0045]
• WO 2008/014903 A1 [0100]
• WO 2011/110498 A1 [0100]

Non-patent literature cited

• DIN EN ISO 2813: 2015-02 [0021, 0026, 0027, 0028, 0058, 0207, 0224, 0233]
• DIN 53107: 2016-05 [0021, 0224, 0233]
• DIN EN ISO 5267-1: 2000-10 [0077]
• DIN EN ISO 4625-1: 2006-04 [0166]

Claims (14)

Recording material (1) at least comprising the following layers: aa) a printable recording layer (10) comprising at least one binder, ba) a first carrier layer (20) and ca) a first barrier layer (30) comprising at least one barrier material selected from the group consisting of - polymer binders, - natural waxes, - synthetic waxes, - vegetable oils, - organic pigments, - inorganic pigments, - cross-linked polysaccharides, and - their mixtures, the layers being arranged in the order aa), ba) and ca). Recording material after Claim 1 wherein the printable recording layer (10) comprises or is an ink-absorbing layer, wherein the recording material preferably additionally has a metal layer (11) arranged below the ink-printable recording layer (10) and above the first carrier layer (20) and wherein preferably the ink-printable recording layer ( 10) is disposed on and in contact with the metal layer (11); and / or - comprises at least one pigment. Recording material according to one of the preceding claims, wherein the printable recording layer (10) comprises or is a printable high-gloss layer or a printable glossy layer, preferably having a gloss value of ≥ 40%, particularly preferably% 45%, more preferably 50%, measured in accordance with DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °, or - a gloss value of ≥ 40%, particularly preferably ≥ 45%, more preferably ≥ 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °, or - A gloss value of ≥ 20%, particularly preferably ≥ 25%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °. Recording material according to one of the preceding claims, preferably as a multilayer composite material, at least comprising the following layers: aa) a printable recording layer (10), preferably a printable high-gloss layer or a printable glossy layer, comprising at least one pigment and at least one binder, ba) a first carrier layer (20), bb) an adhesive layer (21), bc) a second carrier layer (22); bd) preferably an intermediate layer (23) comprising at least one binder, and ca) a first barrier layer (30) comprising at least one barrier material selected from the group consisting of - polymeric binders selected from the group consisting of - polyacrylates, - polymethacrylates, - Acrylate copolymers, whereby their monomers are preferably each independently selected from the group consisting of acrylic acid alkyl esters, methacrylic acid alkyl esters, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and their mixtures, - polystyrenes, - polybutadienes, - polyacrylonitriles, - polyethylenes and - their mixtures, - natural waxes, - synthetic waxes, - vegetable oils, - organic pigments, - inorganic pigments, - cross-linked polysaccharides, and - their mixtures, the layers in the order aa), ba), bb), bc), if available bd) , and ca) are arranged. Recording material after Claim 4 wherein the adhesive layer (21) comprises or is a hot melt adhesive layer, wherein the hot melt adhesive layer preferably comprises at least one polymer selected from the group consisting of - polyamides, - polyolefins, preferably polyethylene and amorphous polyalphaolefins, - ethylene vinyl acetate copolymers, - polyester elastomers, - Polyurethane elastomers, - Copolyamide elastomers, - Vinylpyrrolidone / vinyl acetate copolymers and - Mixtures or combinations thereof. Recording material according to one of the preceding claims, wherein the first carrier layer and / or the second carrier layer comprises a paper substrate, preferably selected from the group consisting of a coated paper substrate, an uncoated paper substrate, a non-surface-treated base coated paper substrate and combinations thereof, wherein the second carrier layer preferably comprises or is a paper substrate which is selected from the group consisting of: - a paper substrate that was calendered at a pressure, specified as a so-called line load in kN / m, of at least 40 kN / m and a temperature of at least 25 ° C and / or which is fully impregnated with starch on one or both sides and / or a short fiber pulp with a Schopper-Riegler degree of at least 30 ° SR and a long fiber pulp with a Schopper-Riegler degree of at least 25 ° SR, determined according to DIN EN ISO 5267-1: 2000-10 , and wherein the paper substrate comprises at least a mass fraction of 50% short-fiber pulp, based on the total mass of short-fiber pulp and long-fiber pulp present in the paper substrate; - A paper substrate which comprises cellulose fibers, the mass fraction of the cellulose fibers being 90%, based on the total mass of the paper substrate and determined as the oven-dry mass fraction; a paper substrate comprising cellulose fibers, at least a part of the cellulose fibers consisting of grass fibers; - A paper substrate comprising a pulp, which - has a Schopper-Riegler degree in the range from 24 to 54 ° SR, preferably in the range from 29 to 49 ° SR, particularly preferably in the range from 34 to 44 ° SR, determined according to DIN EN ISO 5267-1: 2000- 10, and or - has a KIT value of at least 7, preferably of at least 11, particularly preferably of at least 12, measured by the Tappi T 559 method; and - their mixtures or combinations. Recording material according to one of the preceding claims, wherein the recording material comprises as an additional layer: cb) a second barrier layer (31) arranged below the first barrier layer (30), comprising at least one barrier material selected from the group consisting of - polymeric binders selected from the group consisting of - polyacrylates, - polymethacrylates, - acrylate copolymers, whereby their monomers are preferably each independently selected from the group consisting of acrylic acid alkyl esters, methacrylic acid alkyl esters, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and mixtures thereof, Polystyrenes, - polybutadienes, - polyacrylonitriles, - polyethylenes and - their mixtures, - natural waxes, - synthetic waxes, - vegetable oils, - organic pigments, - inorganic pigments, - crosslinked polysaccharides, and - mixtures thereof, preferably - the second barrier layer (31), preferably over the entire surface, is arranged on the first barrier layer (30) and is in contact therewith and / or - the at least one barrier material of the second barrier layer (31) is different from the at least one barrier material of the first barrier layer (30). Recording material according to one of the preceding claims, wherein the first barrier layer (30) and / or, if a second barrier layer (31) is present, the second barrier layer is or are selected from the group consisting of - A barrier layer or a barrier screed, which is applied over the entire surface on the first carrier layer or, if a second carrier layer is present, on the second carrier layer, the application weight of the barrier screed having a mass fraction of less than or equal to 5%, based on the Total mass of the first and the second carrier layer, the first and the second carrier layer preferably being a paper substrate and the application weight of the barrier screed having a mass fraction of less than or equal to 5%, based on the total mass of the paper substrate (lutro); - A barrier layer or a barrier screed comprising or consisting of a polymeric binder and a wax, preferably a wax based on a vegetable oil, - a barrier layer or a barrier screed comprising or consisting of a polymeric binder and at least one wax and / or at least one, preferably encapsulated, vegetable oil, - A barrier layer or a barrier screed comprising or consisting of - an acrylate copolymer and or a wax, preferably a wax based on a vegetable oil and / or a synthetic wax; particularly preferably comprising or consisting of one, two or all components a) to c): a) an acrylate copolymer with an average molar mass in the range from 50,000 to 150,000 g / mol, the acrylate copolymer being produced from two, three, four, five, six or seven monomers selected from the group consisting of methyl acrylate and methyl methacrylate , Butyl acrylate, butyl methacrylate, 2-ethylhexyl acrylate, 2-ethylhexyl methacrylate and styrene; b) a wax based on a vegetable oil; c) a wax based on saturated hydrocarbons, the wax based on saturated hydrocarbons preferably comprising octacosane or being octacosane; - a barrier layer or a barrier screed comprising or consisting of at least one binder and at least one pigment, preferably at least one inorganic pigment; - a barrier layer or a barrier screed comprising or consisting of a crosslinked polysaccharide, preferably comprising or consisting of a crosslinked xylan; wherein the first barrier layer (30) and the optionally present second barrier layer (31) are preferably different. Recording material after Claim 8 wherein the first barrier layer (30) and the second barrier layer (31) are present and wherein the second barrier layer (31) is different from the first barrier layer (30). A method for producing a recording material (1), at least comprising the following steps: A) i. Providing or producing a first carrier substrate (20), having a first side and a second side opposite the first side; ii. Providing or preparing a first printing layer coating composition for producing a printable recording layer, comprising at least one binder and preferably at least one pigment; ii-1. preferably providing or producing a second printing layer coating composition and optionally further printing layer coating compositions, comprising at least one binder and preferably at least one pigment, for producing a printable recording layer, iii. Applying the provided or prepared first printing layer coating composition to the first side of the first carrier substrate (20); iii-1. preferably applying the provided or prepared second printing layer coating composition and optionally further printing layer coating compositions to the first or the preceding, preferably dried and / or crosslinked, printing layer coating composition; iv. Forming a printable recording layer (10) on the first side of the first carrier substrate (20), preferably by drying the applied first or the last applied printing layer coating composition; v. preferably providing or producing an interlayer coating composition, said interlayer coating composition comprising at least one binder; vi. preferably applying the interlayer coating composition to the second side of the first support substrate (20); vii. if in step vi. an interlayer coating composition has been applied to the second side of the first carrier substrate (20), forming an interlayer (23), preferably by drying and / or crosslinking the interlayer coating composition; viii. Providing or producing a first barrier screed comprising at least one barrier material and / or at least one barrier material precursor; ix. Applying the provided or produced first barrier screed to the second side of the first carrier substrate (20) or, if in step vii. an intermediate layer (23) has been formed on the intermediate layer; and x. Forming a first barrier layer (30) on the second side of the first carrier substrate (20) or on the intermediate layer (23), preferably by drying and / or crosslinking the first barrier screed; or B) i. Providing or producing a first carrier substrate (20), having a first side and a second side opposite the first side; ii. Providing or producing a first printing layer coating composition, comprising at least one binder and preferably at least one pigment, for producing a printable recording layer; ii-1. preferably providing or producing a second printing layer coating composition (and optionally further printing layer coating compositions), (in each case) comprising at least one binder and preferably at least one pigment, for producing a printable recording layer, iii. Applying the provided or prepared first printing layer coating composition to the first side of the first carrier substrate (20); iii-1. preferably applying the provided or prepared second printing layer coating composition (and optionally further printing layer coating compositions) to the first or the preceding, preferably dried and / or crosslinked, printing layer coating composition; iv. Forming a printable recording layer (10), preferably forming a printable high-gloss layer or a printable glossy layer, on the first side of the first carrier substrate (20), preferably by or comprising drying the applied first or last applied printing layer coating composition; v. Providing or producing a second carrier substrate (22), having a first side and a second side opposite the first side; vi. preferably providing or producing an interlayer coating composition, said interlayer coating composition comprising at least one binder; vii. preferably applying the interlayer coating composition to the second side of the second support substrate (22); viii. if in step vii. an interlayer coating composition has been applied to the second side of the second carrier substrate (22), forming an interlayer (23), preferably by drying and / or crosslinking the interlayer coating composition; ix. Providing or producing a first barrier screed comprising at least one barrier material and / or at least one barrier material precursor; x. Applying the provided or produced first barrier screed to the second side of the second carrier substrate (22) or, if in step viii. an intermediate layer (23) has been formed on the intermediate layer; xi. Forming a first barrier layer (30) on the second side of the second carrier substrate (22) or on the intermediate layer (23), preferably by drying and / or crosslinking the first barrier screed; xii. Providing or producing an adhesive, preferably a hot melt adhesive; xiii. Contacting the provided or produced adhesive with the second side of the first carrier substrate (20) and / or with the first side of the second carrier substrate (22); xiv. Joining the second side of the first carrier substrate (20) with the first side of the second carrier substrate (22), the adhesive being arranged between the second side of the first carrier substrate (20) and the first side of the second carrier substrate (22); and xv. Hardening or allowing the adhesive to harden, preferably with the formation of an adhesive layer (21) which connects the first carrier substrate to the second carrier substrate. Procedure according to Claim 10 , additionally comprising steps yi. Providing or producing a second barrier screed comprising at least one barrier material and / or at least one barrier material precursor, wherein preferably the at least one barrier material and / or the at least one barrier material precursor of the second barrier screed is each different from that in step A) v. or from that in step B) ix. in each case used at least one barrier material and / or the at least one barrier material precursor of the first barrier screed; yii. Applying the provided or produced second barrier screed to the first barrier layer (30); and yiii. Forming a second barrier layer (31) on the first barrier layer (30), preferably by drying and / or crosslinking the second barrier screed, wherein preferably steps yi. to yiii. after step A) vii. or after step B) xi. are executed. Use of a barrier paper, at least comprising the following layers: bc) a paper substrate as a carrier layer (22), comprising a front side and a rear side opposite the front side; bd) preferably an intermediate layer (23) comprising at least one binder and ca) a first barrier layer (30) comprising at least one barrier material selected from the group consisting of - polymeric binders selected from the group consisting of - polyacrylates, - polymethacrylates, - acrylate Copolymers, the monomers of which are preferably each independently selected from the group consisting of alkyl acrylates, alkyl methacrylates, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and their mixtures, - polystyrenes, - polybutadienes, - polyacrylonitriles, - polyethylenes and - their mixtures, - natural waxes, - synthetic waxes, - vegetable oils, - organic pigments, - inorganic pigments, - cross-linked polysaccharides, and - their mixtures, wherein the layers are arranged in the order bc), if present bd), and ca), for the production of a printable recording material as a multilayer composite material with a barrier function, comprising - a printable high-gloss layer (10) which has a gloss value of ≥ 40%, especially preferably ≥ 45%, more preferably ≥ 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 20 °, or - an ink-printable high-gloss layer (10) which has a gloss value of ≥ 40%, especially preferably ≥ 45%, more preferably ≥ 50%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °, or - an ink-printable gloss layer (10) which has a gloss value of ≥ 20%, especially preferably of ≥ 25%, measured according to DIN EN ISO 2813: 2015-02 at a specific measuring angle of 60 °. and preferably comprising an adhesive layer (21). Use after Claim 12 , wherein the barrier paper comprises as an additional layer: cb) a second barrier layer (31) arranged on the first barrier layer (30), comprising at least one barrier material selected from the group consisting of - polymeric binders selected from the group consisting of - polyacrylates, - Polymethacrylates, - acrylate copolymers, the monomers of which are preferably each independently selected from the group consisting of acrylic acid alkyl esters, methacrylic acid alkyl esters, acrylonitrile, methacrylonitrile, styrene, α-methylstyrene and their mixtures, - polystyrenes, - polybutadienes, - polyacrylonitriles, - polyethylenes and - their mixtures, - natural waxes, - synthetic waxes, - vegetable oils, - organic pigments, - inorganic pigments, - crosslinked polysaccharides, and - their mixtures, preferably - the second barrier layer arranged over the entire surface of the first barrier layer and in contact with this is and / or - this is at least one bar barrier material of the second barrier layer is different from the at least one barrier material of the first barrier layer (30). Use of a recording material (1) according to one of the Claims 1 to 9 as packaging material and / or for packaging a product, preferably - the packaging material is selected from the group consisting of packaging paper; Wrapping material, preferably wrapping paper; Bags, sachets, sachets, backing material, preferably backing paper; Liner material, preferably liner paper; and release material, preferably release paper; and / or the packaging comprises wrapping, wrapping, wrapping, laying under, interposing and / or separating; and / or - the product is selected from the group consisting of - electrical appliances, preferably radio and television sets, computers, computer accessories and mobile devices; - digital and print media; - optical devices, preferably film and photo recording devices - pharmaceutical products, preferably medicinal products, medicinal herbs, herbal mixtures, herbal teas and pharmaceutical dry extracts - Food, preferably selected from the group consisting of confectionery, baked goods, raw materials, fried goods, deep-fried goods, snack goods, sandwiches, bread, burgers, fish, seafood, meat products, sausage products and cheese; and - foodstuffs and luxury foods, preferably comprising - untreated foodstuffs, for example halved animals, raw vegetables, potatoes; - ready-to-cook foods; - ready-to-cook foods; - Mixable and / or ready-to-use foods; - ready-to-prepare foods; - ready-to-eat foods; and - canned foods.

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