SEALABLE PACKAGING PAPER

Abstract

The invention relates to a coated paper, more particularly a translucent coated paper, comprising a base paper and a coating color layer applied thereto, wherein the coating color layer comprising a least one polymer and the coated paper having an opacity in the visible of less than 60%; a method for producing a coated paper of this kind, the use of said coated paper as a packaging material and to packaging comprising the coated paper.

Claims

1. A coated paper comprising a base paper containing less than 5 wt % of fillers and a coating color layer applied directly or indirectly onto one side of the base paper, wherein the coating color layer comprises or consists of at least one heat-sealable material and the coated paper has an opacity in the visible of less than 60%.

2. The coated paper according to claim 1, characterized in that the grammage of the base paper is 45 g/m.sup.2 or less.

3. The coated paper according to claim 1, characterized in that the base paper comprises short fibers, long fibers, recycled pulp and/or alternative fiber materials, such as grass fibers, silphium fibers and/or other mechanically or chemically processed fiber materials.

4. The coated paper according to claim 1, characterized in that the base paper comprises short fibers and long fibers, and that the weight ratio of short fibers to long fibers is greater than 1.

5. The coated paper according to claim 1, characterized in that the coated paper has a cold seam sealing strength of 3 N/15 mm or more when sealing is done with the side coated with the sealing layer on the side coated with the sealing layer (B/B).

6. The coated paper according to claim 1, characterized in that the coated paper has a cold seam sealing strength of 1.5 N/15 mm or more when sealing is done with the side coated with the sealing layer on the side not coated with the sealing layer (B/A).

7. The coated paper according to ah claim 1, characterized in that the coating color layer has a grammage of less than 10 g/m.sup.2.

8. The coated paper according to claim 1, characterized in that the heat-sealable material is selected from the group of thermoplastic polymers, more-particularly polyolefins, vinyl acetate polymers, vinyl acetate copolymers, polyvinyl alcohols, grafted polyvinyl alcohols, ethylene vinyl alcohols, (meth)acrylate (co)polymers, me u ethylene acrylic acid copolymers and styrene acrylate copolymers, acrylic acid esters, (carboxylated) styrene-butadiene copolymers, polyurethanes, carbohydrates and carbohydrate derivatives, aqueous synthetic resin dispersions, thermoplastic ethylene copolymers, and/or natural rubber.

9. The coated paper according to claim 1, characterized in that the coated paper has a burst pressure according to Mullen of more than 150 kPa.

10. The coated paper according to claim 1, characterized in that the coated paper has a longitudinal tensile strength of more than 40 N/15 mm and/or a transverse tensile strength of more than 60 N/15 mm, measured according to ISO 1924-2 (2009).

11. The coated paper according to claim 1, characterized in that the coated paper has a longitudinal elongation at break of >1.5% and/or a transverse elongation at break of >4%, measured according to ISO 1924-2 (2009).

12. The coated paper according to claim 1, characterized in that the coated paper has a thickness of less than 60 m.

13. The coated paper according to claim 1, characterized in that a precoat layer comprising a polymer binder or a surface pigmentation comprising a polymer binder and/or addition of pigments is present between the base paper and the coating color.

14. A process for producing a coated paper according to claim 1, characterized in that an aqueous suspension comprising the starting materials of the coating color layer is applied to the base paper, wherein the aqueous coating suspension has a solids content of 5 to 50 wt % and is applied by a curtain coating process.

15. (canceled)

16. A packaging comprising a coated paper according to claim 1.

17. The packaging according to claim 16, wherein the packaging has a cold seam sealing strength of 3 N/15 mm or more when sealing is done with the side coated with the sealing layer on the side coated with the sealing layer (B/B).

18. The packaging according to claim 16, wherein the packaging has a cold seam sealing strength of 1.5 N/15 mm or more when sealing is done with the side coated with the sealing layer on the side not coated with the sealing layer (B/A).

19. The coated paper according to claim 1, characterized in that the base paper comprises fibers from agricultural residue.

20. The coated paper according to claim 13, characterized in that the precoat polymer layer is starch, the surface pigmentation polymer binder is starch and/or latexes, and/or, the pigment is CaCO.sub.3.

21. A process for producing a coated paper according to claim 14, characterized in that an aqueous suspension comprising the starting materials of the coating color layer is applied to the base paper, wherein the aqueous coating suspension has a solids content of 10 to 30 wt % and is applied by a double curtain coating process with an operating speed of the coating plant of at least 200 m/min.

Description

EXAMPLES

Example 1

[0120] The following coatings were applied to a base paper of 35 g/m.sup.2 with a content of 60% long fibers and 40% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0121] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0122] The coating color layer has the following composition:

TABLE-US-00001 TABLE 1 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0123] The coating color layer has a grammage of 5 g/m.sup.2.

[0124] For this, the precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0125] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00002 TABLE 2 Properties Unit Value Measuring method Grammage g/m.sup.2 40.7 ISO 536 (2020) Thickness m 46 ISO 534 (2012) Longitudinal tensile N/ 60 ISO 1924-2 strength 15 mm Transverse tensile N/ 32 ISO 1924-2 (2009) strength 15 mm Longitudinal % 2.2 ISO 1924-2 (2009) elongation at break Transverse elongation % 5.8 ISO 1924-2 (2009) at break Burst pressure Mullen kPa 209 ISO 2758 (2014) Opacity % 54.2 ISO 2471 (2008-12)) White content % 83.1 ISO 2470-1 (2016-9) Roughness PPS DRS m 3.95 ISO 8791-4 (2008-05) Cold seal seam strength N/ 4.8 ASTM F88 (2015) B-B (140 C., 15 mm 0.3 s, 3.3 bar) Heat seal seam strength N/ 4.3 DIN 55571-2 B-B (140 C., 0.3 s, 15 mm Method C 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam strength N/ 1.9 ASTM F88 (2015) A-B (140 C., 1 s, 15 mm 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 2

Playing Card Packaging (Fold Wrap Packaging):

[0126] A deck of playing cards is wrapped on packaging machines designed for fold wrapping as shown in FIG. 1.

[0127] Sealing is carried out using heat-sealing bars lengthwise and crosswise. Sealing is carried out with the inner side that is coated with a sealing layer onto the uncoated upper side (A/B sealing).

[0128] A cold seal seam strength of 1.5 N/15 mm has proven to be sufficient for this type of packaging.

[0129] The packaged deck is then either packed in another box or placed in a suitable compartment in a game box.

Example 3

Tubular Bag Packaging (Flowpack):

[0130] A few playing cards are wrapped on packaging machines designed for tubular bag packaging as shown in FIG. 2.

[0131] Sealing is carried out using heat-sealing bars lengthwise and crosswise. Sealing is carried out with the inner side that is coated with a sealing layer onto the inner side that is coated with a sealing layer (B/B sealing).

[0132] A cold seal seam strength of 3 N/15 mm has proven to be sufficient for this type of packaging.

[0133] The packaged cards are then either packed in another box or placed in a suitable compartment in a game box.

Example 4

Coding

[0134] Various tests were carried out with QR codes in order to test the possibility of marking both by printing them directly on the uncoated side of the paper according to the invention and on a flat filling good (e.g. playing card cardboard) and reading them through the translucent paper.

[0135] The printer used was a standard HP Office Jet Pro 8210 with the corresponding HP ink 957. A REA VeriCube code reader and tester was used as the reader.

[0136] The software used was TransWin32 V.1.2.0.0/15701r.

[0137] The following results were achieved:

1. QR Code with Little Content Printed on the Uncoated Outside of the Paper: Code Content: Readable

[0138] The QR code is shown in FIG. 3.

TABLE-US-00003 Entire symbol class: 1, 0 (D)* Code type: QR Code Code content (plain text): Test Seal 40 g Evaluation according to: ISO/IEC 15415: 2011, ISO/IEC 18004: 2006

TABLE-US-00004 Parameters Value Min/Max Class Parameters Value Min/max Class Norm Parameter Format information damage 1 max 2 3 Decoding 4 Reflection range 1 Symbol contrast 88% min 40% 4 Contrast uniformity 25% min 30% UEC 100% min 37% 4 Print growth 48 m Modulation 1 Print growth X 46 m AN 0% max 10% 4 Print growth Y 50 m GN 0% max 63% 4 Extreme value of print growth X 87 m, Max 10 m Min Search pattern damage 1 Extreme value of print growth Y 100 m, Max 11 m (FPD) Min Position pattern A1 3 Position pattern A2 3 Optional parameters Position pattern A3 3 Module size 1423 m Synchronization pattern B1 1 Pixel per module 15.272 min 5 4 Synchronization pattern B2 2 Module size X 1422 m Alignment pattern C 4 Module size Y 1424 m

Symbol Properties

TABLE-US-00005 Symbol: Dark symbol on light background Matrix size: 21 21 Rmax: 92% (X: 380, Y: 30) Rmin: 4% (X: 168, Y: 186) Total number of code words: 26 Data code words: 19 Error correction code words: 7 Pattern of masking: 011 Budget for error corrections: 2 (Level L) Corrected errors: 0 Number of unused error corrections: 2 Correctable errors for data modules: from 2 to 16 Total (correct, incorrect) pad characters: 4 (4, 0)
2. QR Code with More Extensive Content Printed on the Uncoated Outside of the Paper: Code Content: Readable

[0139] The QR code is shown in FIG. 4.

TABLE-US-00006 Entire symbol class: 0, 0 (F) Code type: QR Code Code content (plain text): Dies ist ein Test-Barcode im QR Code Format. Ersteller: [LF]Technischen Kundenservices [LF]Koehler Innovation & Technologie GmbH[LF]77704 Oberkirch [LF] Evaluation according to: ISO/IEC 15415: 2011, ISO/IEC 18004: 2006

TABLE-US-00007 Parameters Value Min/Max Class Parameters Value Min/max Class Norm Parameter Version information damage 1 max 2 3 Decoding 4 Reflection range 0 Symbol contrast 89% min 40% 4 Contrast uniformity 0% min 30% UEC 50% min 37% 3 Print growth 27 m Modulation 0 Print growth X 32 m AN 0% max 10% 4 Print growth Y 23 m GN 18% max 63% 4 Extreme value of print growth X Min 114 m, Max 191 m Search pattern damage (FPD) 1 Extreme value of print growth Y Min 132 m, Max 159 m Position pattern A1 2 Position pattern A2 1 Optional parameters Position pattern A3 1 Module size 708 m Synchronization pattern B1 1 Pixel per module 15.208 min 5 4 Synchronization pattern B2 1 Module size X 709 m Alignment pattern C 1 Module size Y 708 m Format information damage 1 max 2 3

Symbol Properties

TABLE-US-00008 Symbol: Dark symbol on light background Matrix size: 45 45 Rmax: 94% (X: 762, Y: 53) Rmin: 5% (X: 130, Y: 424) Total number of code words: 196 Data code words: 156 Error correction code words: 40 Pattern of masking: 010 Budget for error corrections: 20 (Level L) Corrected errors: 7 Number of unused error corrections: 13 Corrected errors for data modules: 10 Correctable errors for data modules: from 20 to 160 Total (correct, incorrect) pad characters: 13 (13, 0)
3. QR Code with Little Content and Reading Through the Translucent Paper with Tight-Fitting Paper on the Flat Filling Good. Code Content: Readable

[0140] The QR code is shown in FIG. 5.

TABLE-US-00009 Entire symbol class: 2, 0 (C) Code type: QR Code Code content (plain text): Test Seal 40 g Evaluation according to: ISO/IEC 15415: 2011, ISO/IEC 18004: 2006

TABLE-US-00010 Parameters Value Min/Max Class Parameters Value Min/max Class Norm Parameter Format information damage 0 max 2 4 Decoding 4 Reflection range 2 Symbol contrast 41% min 40% 2 Contrast uniformity 31% min 30% UEC 100% min 37% 4 Print growth 16 m Modulation 2 Print growth X 30 m AN 0% max 10% 4 Print growth Y 1 m GN 0% max 63% 4 Extreme value of print growth X 141 m, Max 98 m Min Search pattern damage 2 Extreme value of print growth Y 119 m, Max 98 m (FPD) Min Position pattern A1 4 Position pattern A2 4 Optional parameters Position pattern A3 3 Module size 1416 m Synchronization pattern B1 2 Pixel per module 15.195 min 5 4 Synchronization pattern B2 2 Module size X 1412 m Alignment pattern C 4 Module size Y 1419 m

Symbol Properties

TABLE-US-00011 Symbol: Dark symbol on light background Matrix size: 21 21 Rmax: 86% (X: 376, Y: 53) Rmin: 45% (X: 64, Y: 194) Total number of code words: 26 Data code words: 19 Error correction code words: 7 Pattern of masking: 011 Budget for error corrections: 2 (Level L) Corrected errors: 0 Number of unused error corrections: 2 Correctable errors for data modules: from 2 to 16 Total (correct, incorrect) pad characters: 4 (4, 0)
4. QR Code with Little Content and Reading Through the Translucent Paper with not Tight-Fitting Paper on the Flat Filling Good. Code Content: Readable.

[0141] The QR code is shown in FIG. 6.

TABLE-US-00012 Entire symbol class: 0, 0 (F) Code type: QR Code Code content (plain text): Test Seal 40 g Evaluation according to: ISO/IEC 15415: 2011, ISO/IEC 18004: 2006

TABLE-US-00013 Parameters Value Min/Max Class Parameters Value Min/max Class Norm Parameter Format information damage 3 max 2 1 Decoding 0 Reflection range 0 Symbol contrast 43% min 40% 2 Contrast uniformity 0% min 30% UEC 0% min 37% 0 Print growth 54 m Modulation 0 Print growth X 69 m AN 1% max 10% 4 Print growth Y 39 m GN 0% max 63% 4 Extreme value of print growth X 265 m, Max 144 m Min Search pattern damage 0 Extreme value of print growth Y 240 m, Max 212 m (FPD) Min Position pattern A1 1 Position pattern A2 0 Optional parameters Position pattern A3 1 Module size 1412 m Synchronization pattern B1 0 Pixel per module 15.155 min 5 4 Synchronization pattern B2 0 Module size X 1408 m Alignment pattern C 4 Module size Y 1415 m

Symbol Properties

TABLE-US-00014 Symbol: Dark symbol on light background Matrix size: 21 21 Rmax: 89% (X: 359, Y: 376) Rmin: 46% (X: 306, Y: 107) Total number of code words: 26 Data code words: 19 Error correction code words: 7 Pattern of masking: 011 Budget for error corrections: 2 (Level L) Corrected errors: 4 Number of unused error corrections: 0 Corrected errors for data modules: 5 Correctable errors for data modules: from 2 to 16 Corrected errors for search pattern modules: 1 Total (correct, incorrect) pad characters: 4 (4, 0)
5. QR Code with Extensive Content and Reading Through the Translucent Paper with Tight-Fitting Paper on the Flat Filling Good. Code Content: Readable

[0142] The QR code is shown in FIG. 7.

TABLE-US-00015 Entire symbol class: 0, 0 (F) Code type: QR Code Code content (plain text): Dies ist ein Test-Barcode im QR Code Format. Ersteller: [LF]Technischen Kundenservices [LF]Koehler Innovation & Technologie GmbH[LF]77704 Oberkirch [LF] Evaluation according to: ISO/IEC 15415: 2011, ISO/IEC 18004: 2006

TABLE-US-00016 Parameters Value Min/Max Class Parameters Value Min/max Class Norm Parameter Version information damage 3 max 2 1 Decoding 0 Reflection range 0 Symbol contrast 50% min 40% 2 Contrast uniformity 0% min 30% UEC 0% min 37% 0 Print growth 2 m Modulation 0 Print growth X 2 m AN 0% max 10% 4 Print growth Y 6 m GN 26% max 63% 4 Extreme value of print growth X Min - 191 m, Max 166 m Search pattern damage (FPD) 0 Extreme value of print growth Y Min - 173 m, Max 151 m Position pattern A1 0 Position pattern A2 0 Optional parameters Position pattern A3 0 Module size 712 m Synchronization pattern B1 0 Pixel per module 15.284 min 5 4 Synchronization pattern B2 0 Module size X 712 m Alignment pattern C 0 Module size Y 712 m Format information damage 3 max 2 1

Symbol Properties

TABLE-US-00017 Symbol: Dark symbol on light background Matrix size: 45 45 Rmax: 93% (X: 768, Y: 63) Rmin: 43% (X: 237, Y: 117) Total number of code words: 196 Data code words: 156 Error correction code words: 40 Pattern of masking: 010 Budget for error corrections: 20 (Level L) Corrected errors: 94 Number of unused error corrections: 0 Corrected errors for data modules: 142 Correctable errors for data modules: from 20 to 160 Corrected errors for search pattern modules: 42 Total (correct, incorrect) pad characters: 13 (13, 0)

Example 5

[0143] The following coatings were applied to a base paper of 35 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0144] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0145] The coating color layer has the following composition:

TABLE-US-00018 TABLE 3 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0146] The coating color layer has a grammage of 5 g/m.sup.2.

[0147] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0148] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00019 TABLE 4 Measuring Properties Unit Value method Grammage g/m.sup.2 40.4 ISO 536 (2020) Thickness m 47.8 ISO 534 (2012) Longitudinal tensile N/ 55.7 ISO 1924-2 strength 15 mm Transverse tensile N/ 31.5 ISO 1924-2 strength 15 mm (2009) Longitudinal % 2.0 ISO 1924-2 elongation at break (2009) Transverse elongation % 6.1 ISO 1924-2 at break (2009) Burst pressure Mullen kPa 173 ISO 2758 (2014) Opacity % 51.3 ISO 2471 (2008-12) White content % 83.8 ISO 2470-1 (2016-9) Roughness PPS DRS m 4.07 ISO 8791-4 (2008-05) Cold seal seam strength N/ 5.2 ASTM F88 (2015) B-B (140 C., 0.3 s, 15 mm 3.3 bar) Heat seal seam strength N/ 4.8 DIN 55571-2 B-B (140 C., 0.3 s, 15 mm Method C 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam strength N/ 1.8 ASTM F88 (2015) A-B (140 C., 1 s, 15 mm 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 6

[0149] The following coatings were applied to a base paper of 25 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0150] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0151] The coating color layer has the following composition:

TABLE-US-00020 TABLE 5 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0152] The coating color layer has a grammage of 4 g/m.sup.2.

[0153] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0154] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00021 TABLE 6 Measuring Properties Unit Value method Grammage g/m.sup.2 29.6 ISO 536 (2020) Thickness m 39.0 ISO 534 (2012) Longitudinal tensile N/ 39.6 ISO 1924-2 strength 15 mm Transverse tensile N/ 20 ISO 1924-2 strength 15 mm (2009) Longitudinal % 1.3 ISO 1924-2 elongation at break (2009) Transverse elongation % 4.0 ISO 1924-2 at break (2009) Burst pressure Mullen kPa 96 ISO 2758 (2014) Opacity % 37.9 ISO 2471 (2008-12) White content % 81.5 ISO 2470-1 (2016-9) Roughness PPS DRS m 3.67 ISO 8791-4 (2008-05) Cold seal seam strength N/ 3.2 ASTM F88 (2015) B-B (140 C., 0.3 s, 15 mm 3.3 bar) Heat seal seam strength N/ 3.0 DIN 55571-2 B-B (140 C., 0.3 s, 15 mm Method C 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam strength N/ 1.7 ASTM F88 (2015) A-B (140 C., 1 s, 15 mm 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 7

[0155] The following coatings were applied to a base paper of 25 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0156] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0157] The coating color layer has the following composition:

TABLE-US-00022 TABLE 7 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0158] The coating color layer has a grammage of 3 g/m.sup.2.

[0159] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0160] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00023 TABLE 8 Properties Unit Value Measuring method Grammage g/m.sup.2 28.6 ISO 536 (2020) Thickness m 37.0 ISO 534 (2012) Longitudinal N/ 39.6 ISO 1924-2 tensile strength 15 mm Transverse tensile N/ 20 ISO 1924-2 (2009) strength 15 mm Longitudinal % 1.3 ISO 1924-2 (2009) elongation at break Transverse % 4.0 ISO 1924-2 (2009) elongation at break Burst pressure kPa 96 ISO 2758 (2014) Mullen Opacity % 37.9 ISO 2471 (2008-12) White content % 81.5 ISO 2470-1 (2016-9) Roughness PPS DRS m 3.67 ISO 8791-4 (2008-05) Cold seal seam strength N/ 3.2 ASTM F88 (2015) B-B (140 C., 0.3 s, 15 mm 3.3 bar) Heat seal seam strength N/ 2.9 DIN 55571-2 B-B (140 C., 0.3 s, 15 mm Method C 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam N/ 1.5 ASTM F88 (2015) strength A-B (140 C., 15 mm 1 s, 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 8

[0161] The following coatings were applied to a base paper of 30 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0162] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0163] The coating color layer has the following composition:

TABLE-US-00024 TABLE 9 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0164] The coating color layer has a grammage of 4 g/m.sup.2.

[0165] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0166] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00025 TABLE 10 Properties Unit Value Measuring method Grammage g/m.sup.2 34.4 ISO 536 (2020) Thickness m 41.5 ISO 534 (2012) Longitudinal tensile N/ 44.0 ISO 1924-2 strength 15 mm Transverse tensile N/ 23.9 ISO 1924-2 (2009) strength 15 mm Longitudinal elongation % 1.3 ISO 1924-2 (2009) at break Transverse elongation % 5.0 ISO 1924-2 (2009) at break Burst pressure Mullen kPa 108 ISO 2758 (2014) Opacity % 44.6 ISO 2471 (2008-12) White content % 83.0 ISO 2470-1 (2016-9) Roughness PPS DRS m 4.11 ISO 8791-4 (2008-05) Cold seal seam N/ 3.5 ASTM F88 (2015) strength B-B (140 C., 15 mm 0.3 s, 3.3 bar) Heat seal seam N/ 3.3 ASTM F88 (2015) strength B-B (140 C., 15 mm 0.3 s, 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam N/ 1.6 DIN 55571-2 strength A-B (140 C., 15 mm Method C 1 s, 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 9

[0167] The following coatings were applied to a base paper of 30 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0168] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0169] The coating color layer has the following composition:

TABLE-US-00026 TABLE 11 Trade name Material % ods Hypod 2000 Heat-sealable polyolefin 97.58 Walocel CRT 100 Sodium carboxymethyl cellulose 0.68 Acroflex VX 559 Acrylate polymer 0.2 Sterocoll DF3 Rheology additives based on 0.05 polyacrylamide Aerosol OT-70PG Surfactant based on Na- 0.49 docusate Metolat 368 Wetting agent, based on a fatty 1.00 acid ester

[0170] The coating color layer has a grammage of 3 g/m.sup.2.

[0171] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0172] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00027 TABLE 12 Properties Unit Value Measuring method Grammage g/m.sup.2 33.2 ISO 536 (2020) Thickness m 40.7 ISO 534 (2012) Longitudinal tensile N/ 44.1 ISO 1924-2 strength 15 mm Transverse tensile N/ 23.8 ISO 1924-2 (2009) strength 15 mm Longitudinal elongation % 1.3 ISO 1924-2 (2009) at break Transverse elongation % 4.9 ISO 1924-2 (2009) at break Burst pressure Mullen kPa 106 ISO 2758 (2014) Opacity % 44.3 ISO 2471 (2008-12) White content % 83.4 ISO 2470-1 (2016-9) Roughness PPS DRS m 4.01 ISO 8791-4 (2008-05) Cold seal seam N/ 3.1 ASTM F88 (2015) strength B-B (140 C., 15 mm 0.3 s, 3.3 bar) Heat seal seam N/ 2.8 DIN 55571-2 strength B-B (140 C., 15 mm Method C 0.3 s, 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam N/ 1.5 ASTM F88 (2015) strength A-B (140 C., 15 mm 1 s, 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

Example 10

[0173] The following coatings were applied to a base paper of 40 g/m.sup.2 with a content of 40% long fibers and 60% short fibers. The base paper additionally contains 2 wt % of filler.

Precoat/Primer:

[0174] The precoat contains 100 wt % of starch. The grammage of the precoat is 1 g/m.sup.2.

Coating Color Layer:

[0175] The coating color layer has the following composition:

TABLE-US-00028 TABLE 13 Trade name Material % ods Sealcoat MB 46 HE Polyvinyl alcohol and polyvinyl 99.305 acetate Lumites I-SC Surfactant based on Na- 0.695 docusate

[0176] The coating color layer has a grammage of 4 g/m.sup.2.

[0177] The precoat was applied using a film press. The coating color layer was applied using a curtain coater.

[0178] The coated paper obtained was examined. The results are shown in the following table:

TABLE-US-00029 TABLE 14 Properties Unit Value Measuring method Grammage g/m.sup.2 45.4 ISO 536 (2020) Thickness m 49 ISO 534 (2012) Longitudinal tensile N/ 63.33 ISO 1924-2 strength 15 mm Transverse tensile N/ 37.63 ISO 1924-2 (2009) strength 15 mm Longitudinal elongation % 1.7 ISO 1924-2 (2009) at break Transverse elongation % 5.4 ISO 1924-2 (2009) at break Burst pressure Mullen kPa 155 ISO 2758 (2014) Opacity % 55.7 ISO 2471 (2008-12) White content % 83.6 ISO 2470-1 (2016-9) Roughness PPS DRS m 4.0 ISO 8791-4 (2008-05) Cold seal seam N/ 2.7 ASTM F88 (2015) strength B-B (140 C., 15 mm 0.3 s, 3.3 bar) Heat seal seam N/ 2.0 DIN 55571-2 strength B-B (140 C., 15 mm Method C 0.3 s, 3.3 bar, waiting time 80 ms, tensile length 80 mm) Cold seal seam N/ 1.3 ASTM F88 (2015) strength A-B (140 C., 15 mm 1 s, 3.3 bar) Recyclability recyclable PTS-RH 021: 2012 Food contact certified BfR XXXVI; FDA 176.170; FDA 176.180

[0179] All examples were produced and tested using Hypod 2000 or Sealcoat MB 46 HE as the sealing medium. The sealing media can be replaced by other sealing media with comparable values in accordance with the present application.