Coated paper for packaging purposes and method for its manufacture

Abstract

Coated paper, in particular coated paper for packaging food or pharmaceutical products, comprising a backing paper (2), wherein the backing paper (2) has a first surface (2a) and a second surface (2b) opposite the first surface (2a), wherein a first coating (4) is arranged on the first surface (2a) and a second coating (6) is arranged on the second surface, and wherein the backing paper (2) has an absolute paper moisture content according to DIN EN ISO 287 after coating which is ≥ 4% and ≤ 17% and the second coating has a basis weight which is between 1 g / m2 and 7 g / m2.

Description

[0001] The present invention relates to a coated paper for packaging purposes. Various types of paper are known in the prior art for packaging purposes, for example, for packaging food. So-called twist papers are also known, for example, in which the product, such as a candy, is wrapped and the packaging is twisted at both ends.

[0002] Such papers, which are particularly well-known for flexible packaging, typically consist of wax-coated kraft papers or twistable papers in the prior art. PE-extruded coated kraft papers or twist papers are also known from the prior art. Furthermore, silicone-coated kraft papers are also known from the prior art.

[0003] These papers have the particular disadvantage of not being sustainable, especially because they are not recyclable. Furthermore, the grease barrier of such packaging is very limited. Another disadvantage is that, for example, sweets tend to stick to the inner surface of these packages, even when wax-coated papers are used, particularly at temperatures above room temperature. This negative adhesion can also affect the recycling process.

[0004] The present invention therefore aims to provide a packaging paper that avoids, in particular, the aforementioned disadvantages, for example, by adhering less to the goods being packaged and also by increasing the respective grease barriers. In addition, a recyclable product is preferably to be created.

[0005] These objectives are achieved according to the invention by the subject matter of independent claim 1. Advantageous embodiments and further developments are the subject matter of the dependent claims.

[0006] A coated paper according to the invention, in particular a coated paper for packaging food or pharmaceutical products, comprises a backing paper, wherein the backing paper has a first surface and a second surface opposite the first surface, wherein a first coating is arranged on the first surface and a second coating is arranged on the second surface. Furthermore, the backing paper is kraft paper.

[0007] According to the invention, the second coating has a basis weight that lies between 1 g / m² and 7 g / m². Advantageously, the basis weight of said coating (especially in the dry state) lies between 2 g / m² and 4 g / m².

[0008] A recyclable coated paper is particularly preferred.

[0009] In a preferred embodiment, the first surface is an outer surface relating to the product to be packaged. Particularly preferably, the second surface is an inner surface relating to the product to be packaged.

[0010] In a preferred embodiment, the first coating has a print, which can in particular be an inkjet print. All known printing processes, such as gravure, flexographic, UV flexographic, offset, or digital printing, are conceivable for this printing. A protective layer can be provided, which protects this print and preferably has a low coefficient of friction.

[0011] The kraft paper preferably comprises cellulose fibers, preferably bleached and / or unbleached cellulose fibers. Preferably, the cellulose fibers are obtained from softwood, preferably with particularly long and / or strong fibers. Cellulose fibers obtained from long-fibered softwoods are also referred to as kraft fibers within the scope of this invention and its description. These preferably exhibit, as described in detail below, high strength properties and also high elongation, particularly in a transverse direction (in a non-machine direction) or in a direction other than the direction of the fibers.

[0012] The fibers of the kraft paper are preferably arranged in a principal direction of extension, and particularly substantially parallel to each other. The directions of extension of the kraft fibers preferably exhibit angular deviations of less than 30°, preferably less than 25°, preferably less than 20°, and preferably less than 15° with respect to a principal direction of extension.

[0013] In another preferred embodiment, the backing paper is unbleached to create a more natural appearance. The products to be packaged are preferably food items, such as chocolate or sweets.

[0014] The second coating is particularly preferred as a non-stick coating. A non-stick coating, in this context, means that during storage for 24 hours under standard climate conditions, defined for paper, cardboard and pulp as 23 ± 1°C and 50 ± 2% relative humidity (ISO 187 / DIN EN 20187), the contents (e.g., chewing gum) do not stick to the coating.

[0015] The repulping process is often described as producing "stickies." These are paper contaminants that are classified as sticky, are present in the pulp and water systems, and lead to a significant reduction in quality and production disruptions. One of the main sources of stickies is wax. The preferred use of the second coating as a non-stick coating prevents this sticky formation. This can be explained by the fact that, in a preferred embodiment, the varnish does not adhere to the fibers.

[0016] In a further advantageous embodiment, the carrier paper has a tensile strength in a machine direction (MD) which is greater than 30 N / 15 mm, preferably greater than 35 N / 15 mm and preferably greater than 40 N / 15 mm.

[0017] In a further preferred embodiment, the carrier paper has an elongation at break in one machine direction that is greater than 1.5%, preferably greater than 1.8%, and particularly preferably greater than 2%. These values ​​are also determined using a measurement method according to ISO 1924-2:2008.

[0018] In a further preferred embodiment, the carrier paper has a tensile strength in a transverse direction (CD) which is greater than 15 N / 15 mm, preferably greater than 20 N / 15 mm and particularly preferably greater than 22 N / 15 mm.

[0019] These tensile strength values ​​are preferably determined using the measurement standard ISO 1924-2:2008. Preferably, the transverse direction is substantially perpendicular to the machine direction and / or to the fiber orientation of the kraft paper. Particularly preferably, the transverse direction is substantially parallel to a width direction of the kraft paper. Unless explicitly stated otherwise, all tensile strength values ​​refer to a paper grade with a basis weight between 20 and 65 g / m².

[0020] In a further preferred embodiment, the carrier paper has an elongation at break in a transverse direction that is greater than 6%, preferably greater than 6.5%, and particularly preferably greater than 7%. These values ​​are also determined using a measurement method according to ISO 1924-2:2008.

[0021] Preferably, the backing paper exhibits a greater elongation at break in a transverse direction than in a longitudinal direction or the machine direction. Preferably, the elongation at break in the transverse direction is at least 1.5 times greater than the elongation at break in the longitudinal direction, preferably at least 2 times greater, preferably at least 3 times greater, and preferably at least 4 times greater. Particularly preferably, the elongation at break in the transverse direction is at most 10 times greater than the elongation at break in the longitudinal direction, preferably at most 8 times greater, and preferably at most 6 times greater.

[0022] In a further preferred embodiment, the carrier paper has a tear resistance in a machine direction that is greater than 150 mN, preferably greater than 170 mN, preferably greater than 190 mN and particularly preferably greater than 200 mN.

[0023] In a further embodiment, the carrier paper has a tear resistance in a transverse direction that is greater than 170 mN, preferably greater than 190 mN, preferably greater than 200 mN and particularly preferably greater than 210 mN.

[0024] These values ​​of the tear resistance and / or tear propagation resistance according to EN ISO 1974:2012 were particularly preferably determined using the Elmendorf method and / or an Elmendorf device.

[0025] In a preferred embodiment, the backing paper has an absolute moisture content after coating of ≥ 4% and preferably ≥ 6%. Preferably, or independently thereof, the moisture content is ≤ 17% and preferably ≤ 14%, in each case measured according to DIN EN ISO 287. In further preferred embodiments, the backing paper can be treated with a humectant. It has been shown that backing paper with a moisture content as defined above is easier to handle, especially during the packaging process. In particular, backing papers with a moisture content as defined above exhibit higher tear resistance during twisting.

[0026] In another preferred embodiment, the first coating and / or the second coating form an outer surface of the coated paper. Optionally, a printing layer and / or a protective coating may be provided. Alternatively or additionally, a cold-seal coating would also be conceivable. Preferably, such a cold-seal coating is located on an outer surface when forming packaging.

[0027] In a further preferred embodiment, a preferably closed film is arranged on at least one, preferably both, sides of the backing paper. A closed film is preferably understood to be a film that forms a continuous layer on a substrate such as the backing paper. Such a film preferably has no openings, or at least no macroscopically perceptible ones.

[0028] This film is preferably elastic and / or has a reinforcing effect. Preferably, the film comprises a recyclable material and is particularly preferably fully recyclable.

[0029] A film as described above has the task of mechanically supporting the packaging material, preferably the carrier material, during twisting.

[0030] Preferably, a film penetrates at least partially into the fibers of the backing paper, preferably into the fibers that encase the individual cellulose fibers. This preferably results in increased elasticity of the cellulose fibers during twisting.

[0031] Furthermore, a film can preferably stabilize the water balance of the cellulose fibers on the front and back. This has a beneficial effect on further processing (printing, mechanical stress, finishing, etc.). It can also preferably ensure that the paper does not tear or break due to over-drying during subsequent twisting / twisting.

[0032] In a further preferred embodiment, the film comprises at least one compostable, recyclable binder. Preferably, such a binder is selected from the group consisting of lignin, starch, casein, dextrin, polyacrylic acid (polymer or as an ionomer), gum arabic, copal resin, pectin, polyvinyl alcohol, shellac, polyalkanoic acid, polyalkylenealkanoic acid, polyhydroxyalkanoid and / or mixtures thereof.

[0033] In a further advantageous embodiment, the film comprises at least one polar, functionalized binder which has the ability to form cross-links with inorganic salts such as calcium oxides, zinc oxides and ammonium salts.

[0034] Preferably, the film has a thickness between 0.5 µm and 5 µm. Particularly preferably, the film has a thickness of 1 µm to 2 µm. The thickness is particularly preferably determined according to EN ISO 534:2012.

[0035] Preferably, the film is applied from a Newtonian solution in aqueous or organic solvents. The glass transition temperature is preferably at least -100°C, more preferably at least +60°C, and regardless of the temperature, preferably at most +100°C. The glass transition temperature is preferably determined by differential scanning calorimetry (DSC) according to ISO 11357-1 to -7. This temperature range ensures blockage-free further processing.

[0036] In a preferred embodiment, the film may additionally be provided with a print and / or a protective layer / coating on a first side and / or with a second coating on a second side of the backing paper.

[0037] In a preferred embodiment, the film is applied as a lacquer coating. The application method and drying process are known to those skilled in the art. For example, application by smooth roller and drying via a hot air duct.

[0038] In a further advantageous embodiment, the carrier paper has a basis weight between 20 g / m² and 65 g / m², preferably between 35 g / m² and 48 g / m², and particularly preferably between 38 g / m² and 45 g / m². The basis weight is preferably determined according to ISO 536:2012.

[0039] In a further preferred embodiment, the first coating has a COF value greater than 0.10, preferably greater than 0.15, and particularly preferably greater than 0.2. Independently or additionally, the first coating has a COF value less than 0.9, preferably less than 0.8, and particularly preferably less than 0.7. With COF values ​​>1, adhesion of the filling material to the paper is possible.

[0040] In a further embodiment, which may be additional to or independent of the aforementioned embodiment, the second coating has a COF value greater than 0.15, preferably greater than 0.2, and particularly preferably greater than 0.25. Independently of or additionally to this, the second coating has a COF value less than 1, preferably less than 0.9, and particularly preferably less than 0.8. With COF values ​​greater than 1, adhesion of the filling material to the paper is possible.

[0041] This COF value is the frictional engagement value, which is particularly preferably determined according to a method according to ASTM D 1894-14.

[0042] Preferably, the second coating has a basis weight between 1 and 8 g, preferably between 1 and 5 g.

[0043] In a further preferred embodiment, the second coating is a water-based dispersion, which preferably comprises polymer particles. The polymer particles preferably have a polymer particle size (measured as d 50 by Sedigraph) that is larger than 1 µm, preferably larger than 2 µm, preferably larger than 3 µm and particularly preferably larger than 4 µm.

[0044] Preferably, the first coating is a dispersion of thermoplastic elastomers, more preferably a dispersion of olefinic copolymers. Alternatively, EAA / EMA dispersions, as well as the same as ionomer dispersions, can be used, or the dispersion can contain one or more EAA / EMA-based ionic polymers.

[0045] In a further preferred embodiment, the second coating comprises a dispersion selected from a group of dispersions including a styrene-based (co-)polymer, an acrylic acid-based (co-)polymer, a styrene- and acrylic acid-based co-polymer, a thermoplastic elastomer, and an ionomer.

[0046] Polymer particles exhibiting very good film-forming properties are preferred. The glass transition temperature, preferably measured by differential scanning calorimetry (DSC), is preferably at least -100°C, more preferably at least -10°C, and regardless of this, preferably at most +100°C.

[0047] In a further preferred embodiment, the second coating has an elongation at break of more than 400%, preferably more than 600%, preferably more than 700%, preferably more than 800% and preferably more than 900%.

[0048] In a further preferred embodiment, the second coating has a tensile strength and / or tear strength of more than 10 MPa, preferably more than 15 MPa, and particularly preferably more than 20 MPa. The tear strength is particularly preferably measured or determined according to the method JIS-K 6760.

[0049] In a further preferred embodiment, the second coating can be heat-sealed relative to the substrate, the first coating and / or itself.

[0050] In a further preferred embodiment, the second coating is heat-sealable and, in particular, heat-sealable from itself and, in particular, heat-sealable at a temperature of less than 90°C, preferably less than 80°C and preferably less than 70°C.

[0051] A corresponding sealability is also preferred with regard to paper.

[0052] In another preferred embodiment, the second coating, for example a lacquer layer, is coated with a cold-seal lacquer.

[0053] In another preferred embodiment, the coated paper forms a grease barrier. This grease barrier exhibits properties corresponding to KIT 12. This value was preferably determined in accordance with the TAPPI 559 test method. The indirect KIT test method of the TAPPI T-559 standard is used to verify the grease resistance of fluorochemically coated paper and cardboard.

[0054] The grease resistance of paper can be determined using the KIT test (Tappi). In this test, a very thin oil (palm oil) is dripped onto the paper surface. If a halo forms around the drop on the reverse side (i.e., the side opposite the side where the oil was applied), the test is considered failed. Diluting the palm oil with solvents (e.g., toluene) makes the oil more aggressive, allowing it to penetrate the paper surface more easily. A KIT value of 1 means that even undiluted palm oil was able to penetrate the paper surface. A KIT value of 9 indicates that the surface can withstand even the more aggressive liquid, and the paper is therefore extremely grease-resistant.

[0055] A suitable barrier for a palm kernel fat test was preferably determined. Measurements can be carried out according to ISO 16523 or DIN 531165. These resulted in penetration marks of less than 1 mm.

[0056] In a further preferred embodiment, the carrier paper has a smoothness greater than 1300 s, preferably greater than 1350 s, and more preferably greater than 1400 s. In a further preferred embodiment, the carrier paper has a smoothness less than 2000 s, preferably less than 1900 s, and particularly preferably less than 1800 s. In particular, this is the smoothness according to Bekk, which is particularly preferably measured according to a method according to ISO 5627:1995.

[0057] In a further preferred embodiment, the carrier paper has a liquid absorption capacity and in particular a water absorption capacity which is greater than 20 g per m 2< , preferably greater than 22 g per m 2< and particularly preferably greater than 24 g per m 2< .

[0058] In this or another preferred embodiment, the carrier paper has a water absorption capacity of less than 32 g / m², preferably less than 30 g / m², and particularly preferably less than 28 g / m². The COBB 60 value (at 105°C for 2 minutes) according to ISO 535:2014 is preferably measured. The COBB value indicates the water absorption capacity of paper and solid board or corrugated board.

[0059] Preferably, the coated paper has a water absorption capacity of less than 25 g / m², more preferably less than 23 g / m², and particularly preferably less than 21 g / m². Additionally or alternatively, the coated paper preferably has a water absorption capacity of greater than 5 g / m², more preferably greater than 7 g / m², and particularly preferably greater than 9 g / m². In particular, a coated paper with a water absorption capacity in the range of 10–20 g / m² is preferred. As explained above regarding the water absorption capacity of the substrate paper, these values ​​preferably represent the COBB 60 value (at 105°C for 2 minutes), measured according to ISO 535:2014.

[0060] The applicant has determined that the aforementioned values ​​are particularly suitable for the carrier paper described herein and especially for the entire coated paper.

[0061] Particularly preferably, as mentioned above, the coated paper has at least three layers and particularly preferably exactly three layers including the backing paper (where an additional top layer for a varnish and / or a color layer may be provided).

[0062] In another preferred embodiment, the carrier paper has a maximum porosity of 40 ml / min.

[0063] A porosity of less than 35 ml / min is particularly preferred, less than 30 ml / min is preferred, and less than 25 ml / min is preferred.

[0064] The Bendsen method, which uses an air leak method with a predetermined differential pressure, is particularly preferred for determining porosity. A preferred method for determining porosity is specified in ISO 5636-3:2013.

[0065] The present invention further relates to a method for producing a coated paper comprising the following steps. First, a substrate paper is provided, the substrate paper preferably being kraft paper and having a first surface and a second surface, the second surface being opposite the first surface. In a further process step, a first coating is applied to the first surface of the substrate paper. In a further process step, a second coating is applied to the second surface of the substrate paper.

[0066] The second coating preferably has a basis weight between 1 g / m² and 7 g / m². Preferably, an intaglio printing process is used in at least one process step.

[0067] Further advantages and embodiments are shown in the attached drawings: These show: Fig. 1 is a schematic representation of a coated paper according to the invention. Fig. 2 is a schematic representation of a preferred embodiment of a coated paper with a film on one side of the backing paper.

[0068] Fig. 1 Figure 1 shows a schematic representation of a coated paper 1 according to the invention. Reference numeral 2 denotes a substrate. This substrate 2 has a first surface 2a and a second surface 2b.

[0069] A first coating 4 is arranged on the first surface 2a, and a second coating 6 is arranged on the second surface 2b. The second coating 6 is assigned to a product to be packaged in a packaging state, and the first coating 4 faces outwards. Preferably, both coatings are arranged over the entire surface of the substrate 2.

[0070] A print can also be applied to the first coating 4. Furthermore, a protective layer (not shown) is preferably provided for this print.

[0071] Surface 6a of the second coating is also, in relation to the entire coated paper, an outer surface of the same. Likewise, surface 4a of the first coating (disregarding any printing and its protective layer) is also another outer surface of the coated paper 1.

[0072] Fig. 2 Figure 1 shows a schematic representation of a preferred embodiment of a coated paper 1 with a film 8 on a surface 2a of the carrier paper 2. Such a film 8 can serve to mechanically support the packaging material, preferably the carrier material 2, during twisting.

[0073] Preferably, a film 8 penetrates at least partially into fibers of the carrier paper 2, preferably into the fibers that encase the individual cellulose fibers. This preferably results in increased elasticity of the cellulose fibers during twisting.

[0074] In this embodiment, the coating 4 is arranged on the side of the film 8 opposite the carrier paper 2. Analogous to the one described in Fig. 1 In the illustrated embodiment, a second coating 6 is arranged on the second surface 2b of the carrier material 2.

[0075] In addition to the one in Fig. 2 In a preferred embodiment (not shown), in addition to the film shown on a surface 2a of the carrier paper 2, a further film 8 can be arranged on a second opposing surface 2b of the carrier paper 2. Such a film 8 is then arranged between the carrier material 2 and the second coating 6.

[0076] A film 8 is preferably elastic and / or has a reinforcing effect. Preferably, the film 8 comprises a recyclable material and is particularly preferably fully recyclable.

[0077] Preferably the film 8 (arranged on one or both sides of the carrier paper 2) is a closed film 8.

[0078] The applicant reserves the right to claim all features disclosed in the application documents as essential to the invention, provided they are novel individually or in combination compared to the prior art. It is further noted that the individual figures also describe features which may be advantageous on their own. A person skilled in the art will immediately recognize that a particular feature described in a figure may be advantageous even without incorporating other features from that figure. Furthermore, a person skilled in the art will recognize that advantages may also arise from a combination of several features shown in individual or different figures.

Claims

1. Coated paper, in particular coated paper for packaging food or pharmaceutical products, comprising a backing paper (2), wherein the backing paper (2) has a first surface (2a) and a second surface (2b) opposite the first surface (2a), wherein at least a first coating (4) is arranged on the first surface (2a) and a second coating (6) is arranged on the second surface, and wherein the backing paper is kraft paper, characterized by the fact that The carrier paper (2) after coating has an absolute paper moisture content according to DIN EN ISO 287 which is ≥ 4% and ≤ 17% and the second coating has a basis weight which is between 1 g / m² 2 and 7 g / m² 2 lies.

2. Coated paper (1) according to claim 1, characterized by the fact thata film (8) is arranged between the carrier paper (2) and the first and / or second coating (4, 6), wherein the film (8) is preferably a closed and elastic film (8) and acts as a reinforcing layer, and / or the film has a thickness of 0.5 - 5 µm, preferably 1 - 2 µm and / or is at least partially embedded in fibers of the carrier paper.

3. Coated paper (1) according to claim 2, characterized by the fact thatThe film comprises at least one compostable, recyclable binder, wherein such a binder is preferably selected from a group comprising lignin, starch, casein, dextrin, polyacrylic acid (polymer or as ionomer), gum arabic, copal resin, pectin, polyvinyl alcohol, shellac, polyalkanoic acid, polyalkylenealkanoic acid, polyhydroxyalkanoid and / or mixtures thereof, and / or the film comprises a polar, functionalized binder which has the ability to form cross-links with inorganic salts, such preferably calcium oxides, zinc oxides and ammonium salts.

4. Coated paper (1) according to at least one of the preceding claims, characterized by the fact thatthe carrier paper (2) has a tensile strength in a machine direction (MD) which is greater than 30 N / 15 mm, preferably greater than 35 N / 15 mm and preferably greater than 40 N / 15 mm and / or the carrier paper (2) has a tensile strength in a transverse direction (CD) which is greater than 15 N / 15 mm, preferably greater than 20 N / 15 mm and preferably greater than 22 N / 15 mm.

5. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the carrier paper (2) has an elongation at break in a machine direction (MD) that is greater than 1.5%, preferably greater than 1.8%, preferably greater than 2.0% and / or the carrier paper (2) has an elongation at break in a transverse direction (CD) that is greater than 6%, preferably greater than 6.5% and particularly preferably greater than 7%.

6. Coated paper (1) according to at least one of the preceding claims, characterized by the fact thatthe carrier paper (2) has a tear strength in a machine direction that is greater than 150 mN, preferably greater than 170 mN, preferably greater than 190 mN and particularly preferably greater than 200 mN and / or that the carrier paper (2) has a tear strength in a transverse direction (CD) that is greater than 170 mN, preferably greater than 190 mN, preferably greater than 200 mN and particularly preferably greater than 210 mN.

7. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the first coating (4) and / or the second coating (6) form an outer surface of the coated paper (1).

8. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the carrier paper (2) has a basis weight which is between 20 g / m² 2 and 65 g / m² 2 , preferably between 35 g / m² 2 and 48 g / m² 2 and especially preferably between 38 g / m² 2 and 45 g / m²2 lies.

9. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the first coating has a COF value greater than 0.1, preferably greater than 0.15 and particularly preferably greater than 0.2 and / or less than 0.9, preferably less than 0.8 and particularly preferably less than 0.7 and / or the second coating has a COF value greater than 0.15, preferably greater than 0.2 and particularly preferably greater than 0.25 and / or less than 1, preferably less than 0.9 and particularly preferably less than 0.8 and / or the second coating has a COF value greater than 0.5, preferably greater than 0.6 and particularly preferably greater than 0.7 and / or the second coating has a COF value less than 1.0, preferably less than 0.9 and particularly preferably less than 0.

8.

10. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the second coating (6) is a water-based dispersion which preferably comprises polymer particles, wherein the polymer particles particularly preferably have a medium size (d 50 (Sedigraph)) has a thickness greater than 1 µm, preferably greater than 2 µm, preferably greater than 3 µm and preferably greater than 4 µm.

11. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the second coating comprises a dispersion selected from a group of dispersions containing a styrene-based (co-)polymer, an acrylic acid-based (co-)polymer, a styrene- and acrylic acid-based (co-)polymer, a thermoplastic elastomer and an ionomer, and / or the second coating (6) is heat-sealable, in particular from itself, and in particular is heat-sealable at a temperature of less than 90°, preferably less than 80° and preferably less than 70°.

12. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the second coating (6) has an elongation at break of more than 400%, preferably more than 600%, preferably more than 700%, particularly preferably more than 800% and preferably more than 900% and / or that the second coating has a tensile strength of more than 10 MPa, preferably more than 15 MPa and particularly preferably more than 20 MPa.

13. Coated paper (1) according to at least one of the preceding claims, characterized by the fact that the coated paper (1) forms a grease barrier and / or the coated paper is used for twist applications in the food packaging sector.

14. Coated paper (1) according to at least one of the preceding claims, characterized by the fact thatthe carrier paper (2) has a smoothness greater than 1300 s, preferably greater than 1350 s, preferably greater than 1400 s and / or the carrier paper has a smoothness less than 2000 s, preferably less than 1900 s and preferably less than 1800 s, and / or the carrier paper (2) has a water absorption capacity greater than 20 g / m² 2 , preferably larger than 22 g / m² 2 and preferably larger than 24 g / m² 2 and / or the carrier paper (2) has a water absorption capacity of less than 32 g / m² 2 , preferably less than 30 g / m² 2 and preferably smaller than 28 g / m² 2 .

15. Method for producing a coated paper (1) comprising the steps of: - providing a backing paper, wherein the backing paper (2) is a kraft paper and has a first surface (2a) and a second surface (2b), the second surface (2b) being opposite the first surface (2a); - applying a first coating (4) to the first surface (2a) of the backing paper; - applying a second coating (6) to the second surface (2b) of the backing paper; characterized by the fact that the carrier paper (2) after coating has an absolute paper moisture content according to DIN EN ISO 287 which is ≥ 4% and ≤ 17% and the second coating (6) has a basis weight which is between 1 g / m² 2 and 8 g / m² 2 lies.