EP2506078A1 - Recording material for electrophotographic printing - Google Patents

Abstract

A recording material comprises a carrier material, at least one toner receptive layer, and a metal-coated plastic film arranged between carrier material and toner receptive layer.

Description

FIELD OF THE INVENTION

The invention relates to a recording material with which photo-quality images can be produced by electrophotographic printing processes.

BACKGROUND OF THE INVENTION

The laser printer is based on the principle of electrophotography. Electrophotography, by imaging a photoconductor with the optical image of an original, produces a latent image of electrical charges which is subsequently used to selectively apply a toner (development) and an image (copy) of the original, for example, on paper. to create. One differentiates between direct and indirect as well as wet and dry electrophotography. The wet processes, also called liquid toner processes, use as developers a suspension of a low dielectric constant aliphatic solvent and the toner, while the dry process uses a powder. With the aid of a collimated laser beam and a rotating mirror, an image of the desired side is drawn on the photosensitive drum. The drum is initially negatively charged, with the charge being reversed at the points where the laser beam strikes. The shape of the discharged areas on the drum corresponds to the later expression. About a roll of negatively charged toner, which sticks to the unloaded areas on the image drum, the toner is placed on the drum.

In the dry toner method, the paper is then passed over the image drum. It only touches the drum. Behind the paper a potential field is built up. The toner is transferred to the paper, where it is initially loose. Then the toner is fixed by means of a hot roller and under pressure. The drum is unloaded and excess toner removed from it.

In the liquid toner process, the toner suspension is first transferred to a heated blanket cylinder, on which the carrier liquid is evaporated and the toner is plasticized. From this intermediate drum, the toner image is then transferred to the recording sheet.

The images produced with the help of a laser printer should achieve a quality comparable to a photograph. These include properties such as gloss, stiffness, opacity, high resolution and sharpness, and good lightfastness.

In the publication of HP (Hannelore Breuer): The know-how of the printing: The new laser papers of HP from 13.05.2005, received under 41131.www4.hp.com/Backgrounder_Neue_Laser-Papiere.pdf (as of 31.08.2010 ) multilayer coated papers are described with "open" porous surface on both sides. However, images prepared using such papers have a haptic and surface gloss different from conventional silver halide images.

To get closer to the goal of photo-like quality, electrophotographically generated images are produced on substrates that have the feel and appearance of a typical silver salt photo. In the DE 44 35 350 C1 For example, there is described an image-receiving material for electrophotography comprising a thermoplastic-coated base paper and a toner-receiving layer, and an antistatic backing layer. A disadvantage of this material is that it still needs improvement in terms of toner fixation and behavior in the printer. Furthermore, after printing an image, such materials show troublesome shiny spots which are due to the oil-like substances often used as release agents in the toner formulations.

Further recording materials for electrophotographic processes are described, for example, in US Pat EP 0 789 281 B1 . EP 1 115 559 . JP 2006-215494 . JP 2007-188 055 and JP 2010-020283 ,

SUMMARY OF THE INVENTION

It is therefore an object of the invention to provide a recording material which is printable from at least one side, a good, comparable with a silver salt photo image quality and in addition to good light and ozone resistance during storage a good collection and transport behavior in the Printer and has a good stackability.

This object is achieved by a recording material comprising a carrier material and at least one toner-receiving layer, wherein the recording material contains a metal-coated plastic film arranged between the carrier material and the toner-receiving layer. Preferably, metals are used for coating the plastic film, which have an electrical conductivity of at most 40 x 10 ⁶ S / m. Electrical conductivity refers to the ability of a substance to conduct electrical current, the reciprocal of which is resistivity. Particularly suitable for this purpose is aluminum.

The plastic film suitable for coating with the metal may be a polyolefin film, for example a polyethylene or polypropylene film. It can be single-layered or multi-layered. Preferably, a multilayer biaxially oriented polyolefin film, in particular a polypropylene film is used. The polyolefin film preferably contains a porous core layer and at least one substantially nonporous surface layer disposed on at least one side of the core layer.

The thickness of the metal-coated plastic film may preferably be 10 to 50 μm. The metal-coated plastic film preferably has an opacity of more than 98% and a specific surface topography expressed by a roughness value Rz of 0.01 to 2 μm.

The carrier material may be uncoated base paper, a coated base paper (pigmented layered base paper) or a resin coated paper.

The toner-receiving layer may preferably contain a water-soluble and / or water-dispersible binder, a finely divided oil-absorbing pigment and / or an electrically conductive component, wherein the electrically conductive Component may be an electrically conductive finely divided oxide or an electrically conductive polymer.

DETAILED DESCRIPTION OF THE INVENTION

For the purposes of the invention, the term base paper is understood to mean an uncoated or surface-sized paper. A base paper may be in addition to pulp fibers, sizing agents such as alkylene dimers, fatty acids and / or fatty acid salts, epoxidized fatty acid amides, alkenyl or alkyl succinic anhydride, wet strength agents such as polyamine-polyamide-epichlorohydrin, dry strength agents such as anionic, cationic or amphoteric polyamides or cationic starches, optical brighteners, fillers, pigments , Dyes, defoamers and other known in the paper industry tools may contain. The base paper can be surface-sized. Examples of suitable sizing agents are polyvinyl alcohol or oxidized starch. The base paper can be produced on a Fourdrinier or a Yankee paper machine (cylinder paper machine). The weight per unit area of the base paper may be 50 to 250 g / m ² , in particular 80 to 180 g / m ² . The raw paper can be used in uncompacted or compacted form (smoothed). Particularly suitable are base papers having a density of 0.8 to 1.2 g / cm ³ , in particular 0.90 to 1.1 g / cm ³ . As pulp fibers, for example, bleached hardwood kraft pulp (LBKP), bleached softwood kraft pulp (NBKP), bleached hardwood sulfite pulp (LBSP) or bleached softwood sulfite pulp (NBSP) can be used. Pulp fibers derived from paper wastes can also be used. The pulp fibers mentioned can also be used mixed and proportions of other fibers, for example of synthetic resin fibers, mixed. However, pulp fibers are preferred 100% hardwood pulp used. The mean fiber length of the unground pulp is preferably 0.6 to 0.85 mm (Kajaani measurement). Furthermore, the pulp has a lignin content of less than 0.05 wt .-%, in particular 0.01 to 0.03 wt .-%, based on the mass of the pulp.

As fillers, for example, kaolins, calcium carbonate in its natural forms such as limestone, marble or dolomite stone, precipitated calcium carbonate, calcium sulfate, barium sulfate, titanium dioxide, talc, silica, alumina and mixtures thereof can be used in the raw paper. Particularly suitable is calcium carbonate with a particle size distribution in which at least 60% of the particles are smaller than 2 microns and at most 40% are smaller than 1 micron. In a particular embodiment of the invention, calcite is used with a particle size distribution in which about 25% of the particles have a particle size of less than 1 micron and about 85% of the particles have a particle size of less than 2 microns.

In a particular embodiment of the invention, a pigment-containing layer can be arranged on the base paper. The pigment may be a metal oxide, silicate, carbonate, sulfide or sulfate. Particularly suitable are pigments such as kaolins, talc, calcium carbonate and / or barium sulfate. Particularly preferred is a pigment having a narrow particle size distribution, wherein at least 70% of the pigment particles have a size of less than 1 micron. The proportion of the pigment with the narrow particle size distribution of the total amount of pigment is at least 5 wt .-%, in particular 10 to 90 wt .-%. Particularly good results can be achieved with a proportion of the pigment having the narrow particle size distribution of from 30 to 80% by weight of the total pigment. Under a pigment with a narrow particle size distribution according to the invention also understood to mean pigments having a particle size distribution in which at least about 70% by weight of the pigment particles have a size of less than about 1 μm and at 40 to 80% by weight of these pigment particles the difference between the pigment having the largest particle size (diameter) and the pigment of the smallest grain size is smaller than about 0.4 μm. Particularly advantageous proved to be a calcium carbonate with a d50% value of about 0.7 microns.

In a further embodiment of the invention, a pigment mixture consisting of the abovementioned calcium carbonate and kaolin can be used in the pigment-containing layer. The quantitative ratio calcium carbonate / kaolin is preferably 30:70 to 70:30. The amount ratio of binder / pigment in the pigment-containing layer may be 0.1 to 2.5, preferably 0.2 to 1.5, but especially about 0.9 to 1.3. Any known water-soluble and / or water-dispersible binder can be used in the pigment-containing layer. In addition to latex binders, film-forming starches, such as thermally modified starches, in particular corn starches or hydroxypropylated starches, are particularly suitable for this purpose. The pigment-containing layer can be applied in-line or off-line with all customary in papermaking application units, the order quantity is chosen so that after drying the application weight 0.1 to 30 g / m ² , in particular 1 to 20 g / m ² , or According to a particularly preferred embodiment, 2 to 8 g / m ² . In a preferred embodiment, the pigment-containing layer is applied with a size press or film press integrated within the paper machine.

In a further embodiment of the invention, the base paper or the coated base paper on both sides with synthetic resin layers be provided. The resin layers (front and / or back resin layer) may preferably contain a thermoplastic polymer. Particularly suitable for this purpose are polyolefins, for example low density polyethylene (LDPE), high density polyethylene (HDPE), polypropylene, 4-methylpentene-1 and mixtures thereof and polyesters, for example polycarbonates. In a particular embodiment of the invention, the thermoplastic polymer is a biodegradable polymer and / or a polymer based on renewable raw materials such as a linear polyester, thermoplastic modified starch, or polylactic acid or a mixture of these polymers with each other or with other polymers.

In a further particularly preferred embodiment of the invention, the front and / or rear synthetic resin layer contains at least 40 wt .-% HDPE having a density of more than 0.95 g / cm ³ , in particular 60 to 80 wt .-%. Particularly preferred is a composition consisting of 65% by weight HDPE having a density greater than 0.95 g / cm ³ and 35% by weight LDPE having a density of less than 0.935 g / cm ³ .

The synthetic resin layers may contain white pigments such as titanium dioxide as well as other auxiliaries such as optical brighteners, dyes and dispersing aids. In a particular embodiment of the invention, antistatic substances, in particular electrically conductive inorganic pigments, are added to the synthetic resin layers.

The coating weight of the synthetic resin layers may be 5 to 50 g / m ² , in particular 5 to 30 g / m ² , but preferably 10 to 20 g / m ² . The synthetic resin layer can be extruded onto the base paper or the coated base paper in one layer or be multilayered coextruded. The extrusion coating can be carried out at machine speeds up to 600 m / min.

The synthetic resin layers may, in one embodiment of the invention, be applied symmetrically on both sides of the base paper, i. the resin layers on both sides of the base paper have the same composition and are identical in surface topography. According to the invention, the surface of the synthetic resin layer may have roughness values Rz of 0.03 to 15 μm on both sides. The determination of the roughness Rz is carried out by a Hommel surface scanner according to DIN 4768.

In another embodiment of the invention, which aims at a one-side printable glossy recording material, the resin layer on the side of the recording material which carries the toner-receiving layer and which is intended for printing (front side) has a lower roughness than that on the back side , In this embodiment, the side of the synthetic resin layer intended for printing has roughness values Rz of 0.03 to 1.8 μm, while the synthetic resin layer arranged on the side not intended for printing has roughness values Rz of 12 to 16 μm.

On the intended for printing side of the carrier material, in particular a base paper or coated base paper, according to the invention, first a metal-coated plastic film is laminated. In this case, a polymeric layer, preferably low density polyethylene (LDPE), is extruded between the substrate and the plastic film. The thickness of the polyethylene layer is 6 to 15 g / m ² , in particular 6 to 10 g / m ² .

The metal-coated plastic film can be laminated according to the invention on one side or on both sides of the carrier material. In the embodiment of the invention where the metal coated plastic film is disposed on only one side of the substrate, the back of the substrate may be extrusion coated with a thermoplastic polymer. Particularly suitable for this purpose are polyolefins, for example low-density polyethylene (LDPE), high-density polyethylene (HDPE), polypropylene, 4-methylpentene-1 and mixtures thereof, and also polyesters. The application weight of the backside polymer layer may be 5 to 50 g / m ² , in particular 5 to 30 g / m ² . In a further embodiment of the invention, a single-layered or multi-layered plastic film, in particular a biaxially oriented polypropylene film, can be applied to the rear side. The core layer may contain substantially non-porous surface layers on both sides.

The metal-coated side of the film applied to the substrate is painted in the next step with a toner-receiving coating solution which forms a toner-receiving layer after drying. In the particular embodiment of the invention, which aims at a double-sided printable marking material, the metal-coated plastic film and the toner-receiving layer are applied on both sides of the substrate.

The toner-receiving layer preferably comprises at least one water-soluble and / or water-dispersible binder, a finely divided pigment and / or an electrically conductive component.

The binder in the toner-receiving layer can be any binder commonly used for paper coatings, preferably starch, polyvinyl alcohol, acrylates or copolymers of acrylates with other monomers are used. Particularly preferred binders are ethylene-acrylic acid copolymers, especially those having a melting range of 70 to 100 ° C.

The finely divided pigment in the toner-receiving layer according to the invention is a finely divided inorganic pigment, for example silica, alumina, alumina hydrate, aluminum silicate, calcium carbonate, zinc oxide, tin oxide, antimony oxide, titanium dioxide, indium oxide or a mixed oxide of these oxides. In a particularly preferred embodiment, the finely divided pigment is zinc oxide, tin oxide, antimony oxide, titanium dioxide indium oxide or a mixed oxide of these oxides. The finely divided pigments may be present individually or as mixtures in the toner-receiving layer.

The finely divided pigments in the toner-receiving layer preferably have an average particle size of less than 1000 nm, in particular less than 200 nm. Particular preference is given to pigments having a BET surface area of from 30 m ² / g to 400 m ² / g. Pigments according to the invention can be obtained by the flame process or by wet-chemical precipitation processes.

According to the invention, the electrically conductive component in the toner-receiving layer can be an electrically conductive polymer and / or an electrically conductive pigment. Electrically conductive polymers according to the invention may be those in which the electrical charge is transported in the form of ions, such as polystyrene sulfonic acid. However, preference is given to polymers in which the electric charge in the form of Electrons or holes are transported, for example, polyanilines and polythiophenes. Is particularly preferred as the conductive polymer doped with polystyrene acid poly (3,4-ethylene-dioxythiophene) (PEDOT: PSS), which is available for example under the names CLEVIOS ^® or ORGACON ^®. If, according to the invention, a polymer is used as the electrically conductive component in the toner-receiving layer, in a particular embodiment of the invention it can replace the water-soluble or water-dispersible binder in whole or in part.

Conductive pigments according to the invention may consist inter alia of metal powder or carbon. However, preference is given to oxides such as antimony oxide, tin oxide, indium oxide or, with particular preference, titanium dioxide or zinc oxide or mixed oxides of the elements antimony, indium, titanium, zinc or tin. The conductive pigments of the invention preferably have an average particle size of less than 1000 nm, more preferably less than 200 nm. If a conductive pigment is used as the electroconductive component, in a preferred embodiment of the invention it may also simultaneously constitute the finely divided pigment of the toner-receiving layer.

The amount of the electrically conductive component in the toner-receiving layer is selected so that the surface resistance of the recording material is less than 15 log (ohms / cm), measured according to DIN 53483. According to the invention, it can be in a range from 0 to 50 wt. in particular 0.1 to 4.0 wt .-%, based on the mass of the dried layer, are.

In a further embodiment of the invention, the toner-receiving layer additionally contains anionic or nonionic surfactants in an amount of 0.01 to 4.0 wt .-%, in particular 0.05 to 2.5 wt .-%, based on the dried layer ,

Optionally, the toner-receiving layer may also contain other adjuvants, such as matting agents, dyes, crosslinking agents, lubricants, anti-blocking agents, and other conventional additives.

The coating composition for forming the toner-receiving layer can be applied in-line or off-line with all customary in papermaking application units, the amount is chosen so that after drying the coating weight of at most 3 g / m ² , in particular 0.1 to 2 g / m ² , or according to a particularly preferred embodiment is 0.3 to 0.7 g / m ² . The coating composition can be applied as a coating by means of a custom coating unit integrated within the extrusion coating installation. For example, a 3-roller application or a squeegee device is particularly well suited for this purpose.

In a further embodiment of the invention, further layers such as protective layers or gloss-improving layers can be applied to the toner-receiving layer. The coating weight of such layers is preferably less than 1 g / m ² .

The following examples serve to further illustrate the invention.

EXAMPLES

A base paper A was made from eucalyptus pulp. For grinding, the pulp was ground as an approximately 5% aqueous suspension (thick matter) with the aid of a refiner to a freeness of 36 ° SR. The mean fiber length was 0.64 mm. The concentration of pulp fibers in the thin was 1 wt .-%, based on the mass of the pulp suspension. Additives such as cationic starch in an amount of 0.4% by weight, as a neutral sizing agent alkyl ketene dimer (AKD) in an amount of 0.48% by weight, wet strength agent polyamine-polyamide-epichlorohydrin resin (Kymene®) were added to the thin material. in an amount of 0.36 wt .-% and a natural CaCO ₃ in an amount of 10 wt .-%. The quantities are based on the pulp mass. The thinstock, whose pH was adjusted to about 7.5, was transferred from the head box to the wire of the paper machine, followed by sheet formation by dewatering the web in the wire section of the paper machine. In the press section, the further dewatering of the paper web to a water content of 60 wt .-%, based on the web weight. Further drying took place in the dryer section of the paper machine with heated drying cylinders. The result was a base paper with a basis weight of 160 g / m ² and a humidity of about 7%.

The base paper is coated on both sides with a coating of a styrene-acrylate binder, starch and a pigment mixture of calcium carbonate and kaolin with a coating weight of 15 g / m ² on both sides, dried and then smoothed with a calender. The material thus obtained is referred to below as base paper A and used for the subsequent lamination of the metal-coated film in the extruder.

Base paper B was produced in the same way as base paper A from eucalyptus pulp. In the pulp dispersion, however, it additionally contains titanium dioxide in an amount such that the base paper web after completion contains 10% by weight of TiO ₂ , based on dry matter. This base paper B was used directly, without applying a further coating composition, for the subsequent lamination of the metal-coated film in an extruder.

Both surfaces (front sides) of the base papers A and B intended for printing were laminated in the extruder after irradiation with a corona discharge with a metallized multilayer biaxially oriented polypropylene film (BOPP film, PZN, Vibac GmbH), whereby a film of polyethylene lower Density (LDPE) was extruded between the paper backing material and the plastic film. The thickness of the adhesion-promoting polyethylene film was 8 g / m ² . The side of the base papers A and B opposite the print side was coated with a polyethylene blend of 30% by weight of a low density polyethylene (LDPE, d = 0.923 g / cm ³ ) and 70% by weight of a high density polyethylene (HDPE, d = 0.964 g / cm ³ ) coated with an application weight of 40 g / m ² in the extruder. The cooling cylinder was chosen so that the resulting surface of the back has a roughness of 0.9 microns, measured as Rz value according to DIN 4768. The materials obtained are hereinafter referred to as A1 and B1.

Subsequently, the sides coated with the metallized film were coated with the toner-receiving coating and dried. The application amount of the coating composition was chosen such that a dry application of 0.5 g / m ² results. The composition of the coating compositions is below specified.

Coating slip a

A dispersion of 3.0 g of a conductive pigment (antimony-doped titanium-tin oxide FT-2000, manufactured by ISK IS-HIHARA SANGYO KAISHA Ltd., Japan) in 27 g of water was prepared and mixed by means of a rotor-stator mixing system (ULTRA-TURRAX ^® from IKA ^® , Germany) until the mean particle size of the pigment is 180 nm. 22.4 g of ethylene acrylate dispersion MICHEM PRIME 4990 ^® RE were mixed with the thus prepared dispersion, 0.1 g surfactant SURFYNOL ^® 440 and 47.5 g of water.

Coating composition b

16.3 g of ethylene acrylate dispersion MICHEM PRIME 4990 ^® RE were mixed with 29.0 g of a dispersion of AEROSIL ^® 300 (manufactured by Evonik Degussa AG, Germany) (having a solid content of 20 wt .-%, 3 g of a dispersion of polystyrene VERSA ^® TL 130, manufacturer Akzo Nobel Surface Chemistry AB, Sweden, polymer content 30 wt .-%), 0.1 g of wetting agents SURFY-NOL ^® 440 and 51.6 g of water mixed.

Coating c

19.3 g of ethylene acrylate dispersion MICHEM PRIME 4990 ^® RE were mixed with 29.0 g of a dispersion of AEROSIL ^® 300 (manufactured by Evonik Degussa AG, Germany) having a solids content of 20 wt .-%, 0.1 g surfactant SURFYNOL ^® 440 and 51.6 g of water mixed.

COMPARATIVE EXAMPLES

Both intended for printing surfaces of the raw papers A and B were after irradiation with a corona discharge with a biaxially oriented polypropylene film TREFAN TND 35 (Manufacturer Treofan Germany GmbH & Co. KG) laminated. The backs of the papers were extrusion coated with a polyethylene blend as in the inventive examples. The resulting materials are referred to below as A2 and B2.

Both intended for printing surfaces of the papers A2 and B2 were then coated with a toneraufreichenden coating and dried. The application amount of the coating composition was chosen such that a dry application of 0.5 g / m ² results. The composition of the coating is given below.

Coating weight d (comparison)

To 27.9 g of an ethylene acrylate dispersion MICHEM PRIME 4990 ^® RE (available from Michelman, Belgium) with a polymer content of 35.7 wt .-%, 0.1 g Wetting agent Surfynol ^® 440 (available from Air Products, The Netherlands ) and 72 g of water.

The recording materials obtained in Examples and Comparative Example were subjected to the tests described below.

surface resistivity Measured with a comb electrode according to DIN 53483, given in log (ohms / cm)

Bonding test : Two sheets of the DIN A4 size substrate are stacked at 23 ° C and 50% RH and loaded with a 10 kg weight. After 65 hours, the leaves are separated manually and the sticking / gluing is evaluated.

+: No bonding,
○: easy bonding,
-: strong bonding

Toner adhesion : The recording materials are printed with an HP ^® Indigo ^® 6000 electrophotographic printer and the adhesion of the toner is assessed at 23 ° C / 50% RH by affixing and repelling a TESA 4104 adhesive tape.

+: Toner layer remains undamaged,
○: toner layer slightly torn off,
-: Toner layer completely torn off the carrier.

Visual assessment of print on gloss spots: The recording materials are printed on an HP ^® Indigo ^® 6000 electrophotographic printer and the print image is visually assessed.

+: no highlights,
- highlights visible.

The test results are summarized in Table 1 below. Table 1 recording material surface resistivity bonding test toner adhesion shiners A1a invention 7.4 + + + Alb invention 12.0 + + + A1c invention 12.5 + + + B1a invention 7.4 + + + B1b invention 12.0 + + + B1c invention 12.5 + + + A2d comparison > 14.9 ○ ○ - B2d comparison > 14.9 ○ ○ -

In addition compression tests with the working with dry toners printers IGen ^® 3 were carried out by XEROX ^® and NexPress ^® from Kodak ^®. Table 2 below shows the test results (averages for the 3 printers). The toner transfer to the label sheet was evaluated visually for the uniformity of homogeneously printed color areas, where "+" stands for good uniformity, "○" for slight density variations and "-" for large density variations in the printed image. recording material Toner transfer toner adhesion shiners A1a invention + + + Alb invention + + + A1c invention ○ + + B1a invention + + + B1b invention + + + B1c invention ○ + + A2d comparison - ○ - B2d comparison - ○ -

EVALUATION OF THE RESULTS

It was found that the images obtained using the recording materials according to the invention have a similar appearance with silver halide images and a comparable haptics. The adhesion of the toner to the surface is good in the recording materials according to the invention, the leaves do not stick together, do not accumulate electrostatically and give a uniform Toner transfer using both dry and liquid toners. Gloss spots by drops of the oils used in the toner as auxiliaries are safely avoided.

Claims (17)

A recording material for electrophotographic printing processes comprising a support material and at least one toner-receiving layer, characterized in that the recording material contains a metal-coated plastic film arranged between the support material and the toner-receiving layer. Recording material according to claim 1, characterized in that the metal has an electrical conductivity of at most 40 x 10 ⁶ S / m. Recording material according to claims 1 and 2, characterized in that the metal is aluminum. Recording material according to at least one of claims 1 to 3, characterized in that the plastic film is a metal-coated multilayer biaxially oriented polypropylene film. Recording material according to at least one of claims 1 to 4, characterized in that the metal-coated side of the plastic film has a specific roughness, expressed by the roughness value Rz, of 0.01 to 2 μm. Recording material according to at least one of claims 1 to 5, characterized in that the rear side of the carrier material has a synthetic resin layer. Recording layer according to claim 6, characterized in that the synthetic resin layer is an extruded polyolefin layer or a laminated polymer film. Recording material according to at least one of claims 1 to 7, characterized in that the toner-receiving layer contains a water-soluble and / or water-dispersible binder, a finely divided inorganic pigment and / or an electroconductive component. A recording material according to claim 8, characterized in that the water-dispersible binder is an ethylene-acrylate polymer or ethylene-acrylate copolymer. Recording material according to claim 8 and 9, characterized in that the finely divided pigment is alumina, alumina hydrate, silica, an oxide of antimony, indium, titanium, zinc or tin or a mixed oxide of two or more of these elements. Recording material according to at least one of claims 8 to 10, characterized in that the finely divided pigment has an average particle size of 10 nm to 2 microns. Recording material according to at least one of claims 8 to 10, characterized in that the finely divided pigment has a BET surface area of 10 m ² / g to 400 m ² / g. Recording material according to at least one of claims 8 to 12, characterized in that the electrically conductive component is a finely divided, electrically conductive pigment. Recording material according to at least one of claims 8 to 12, characterized in that the conductive component is an electroconductive polymer. Recording material according to at least one of claims 8 to 14, characterized in that the amount of the electroconductive component in the toner-receiving layer is 0 to 50 wt .-%, in particular 0.1 to 4.0 wt .-%, based on the mass of dried layer. Recording material according to at least one of claims 1 to 15, characterized in that the carrier material is a base paper or a coated base paper. Recording material according to at least one of claims 6 to 15, characterized in that the surface resistance of the recording material is less than 15 log (ohm / cm), measured according to DIN 53483.