METHOD TO MAKE A CONTAINER FOR CONSUMER GOODS AND CONTAINER FOR CONSUMER GOODS

Abstract

A method of making a container for consumer goods is provided, the method including: folding a first cellulose-based layer to form a package, the package defining a housing for the consumer goods; forming an outer wrapper, the outer wrapper including a second cellulose-based layer having an inner surface defining an inner area and an outer surface defining an outer area, a first polymeric layer provided on the inner surface, and a second polymeric layer provided on less than 30 percent of the outer surface, the first polymeric layer and the second polymeric layer being heat-sealable layers; wrapping the package with the outer wrapper, the wrapping being made so that the first polymeric layer is provided on an inner side of the second cellulose-based layer; and heating the package and the outer wrapper to seal the outer wrapper on the package, forming the container.

Claims

1.-15. (canceled)

16. A method of making a container for consumer goods, the method comprising: folding a first cellulose-based layer to form a package, the package defining a housing for the consumer goods; forming an outer wrapper, the outer wrapper comprising a second cellulose-based layer having an inner surface defining an inner area and an outer surface defining an outer area, a first polymeric layer provided on the inner surface, and a second polymeric layer provided on less than 30 percent of the outer surface, wherein the first polymeric layer and the second polymeric layer are heat-sealable layers; wrapping the package with the outer wrapper, wherein the wrapping is made so that the first polymeric layer is provided on an inner side of the second cellulose-based layer; and heating the package and the outer wrapper to seal the outer wrapper on the package, forming the container.

17. The method according to claim 16, further comprising: folding the first cellulose-based layer to form the package comprising a lid portion and a box portion, the box portion and the lid portion being divided by an opening line, the lid portion being hinged to the box portion; and wrapping the box portion and the lid portion with the outer wrapper, the outer wrapper covering, at least in part, the opening line.

18. The method according to claim 17, wherein the opening line comprises a first weakened line.

19. The method according to claim 16, wherein the step of folding a first cellulose-based layer forming a package comprises folding the first cellulose-based layer forming a package defining a base wall and a top wall; the method further comprising the step of providing the second polymeric layer on portions of the outer surface of the second cellulose-based layer, which cover the top wall or the base wall of the package when the outer wrapper is wrapped around the package.

20. The method according to claim 16, wherein the step of forming an outer wrapper comprises the step of providing a third polymeric layer.

21. The method according to claim 20, wherein the third polymeric layer is located between the second cellulose-based layer and the first polymeric layer.

22. The method according to claim 20, wherein the third polymeric layer is a moisture barrier layer.

23. The method according to claim 16, further comprising: folding the first cellulose-based layer to form a package comprising a lid portion and a box portion, the box portion and the lid portion being divided by an opening line, the lid portion being hinged to the box portion; wrapping the box portion and the lid portion with the outer wrapper, the outer wrapper covering, at least in part, the opening line; and forming a second weakened line on the portion of the outer wrapper covering the opening line.

24. The method according to claim 16, wherein providing a first polymeric layer or providing a second polymeric layer or providing a third polymeric layer comprises forming a composition comprising one or more of: a polymer or copolymer of ethylene, a polymer or copolymer of propylene, a copolymer of styrene acrylate, a copolymer of styrene butadiene, a copolymer of styrene isoprene, a copolymer of hydrogenated styrene butadiene, a copolymer of hydrogenated styrene isoprene, a copolymer of an ester of acrylic or methacrylic acid, a copolymer of vinyl acetate, and a copolymer of polybutene.

25. The method according to claim 24, wherein the composition further comprises wax.

26. The method according to claim 24, wherein the composition further comprises hydrocarbon resin.

27. A container for consumer goods, the container comprising: a package comprising a box portion and a lid portion, the package defining a housing for the consumer goods, the lid portion being hinged to the box portion by a hinge line, an opening line separating the box portion and the lid portion outside the hinge line, the box portion and the lid portion being formed by folding a first multi-layer blank comprising a first cellulose-based layer; and an outer wrapper wrapped and sealed on the package and covering at least partly the opening line, the outer wrapper comprising: a second cellulose-based layer having an inner surface and an outer surface, a first polymeric layer provided on the inner surface of the second cellulose-based layer, and a second polymeric layer provided on less than 30 percent of the outer surface of the second cellulose-based layer, wherein the first polymeric layer and second polymeric layer are heat-sealable layers.

28. The container according to claim 27, wherein the opening line comprises a first weakened line.

29. The container according to claim 27, wherein the outer wrapper further comprises a second weakened line formed on the portion of the outer wrapper covering the opening line.

30. The container according to claim 27, wherein the package further comprises a base wall and a top wall, and a second polymeric layer provided on portions of the outer surface of the second cellulose-based layer covering the base wall or the top wall.

Description

[0314] Examples will now be further described with reference to the figures in which:

[0315] FIG. 1 is a perspective schematic view of a component of a container according to the invention;

[0316] FIG. 2 is a front view of an element of the component of the container of FIG. 1;

[0317] FIG. 3 is an enlarged side view of the element of FIG. 2;

[0318] FIG. 4 is a front view of an element of another component of the container according to the invention;

[0319] FIG. 5 is an enlarged side view of the element of FIG. 4;

[0320] FIG. 6 is a different embodiment of the element of FIG. 4, in a side view;

[0321] FIG. 7 is a front view of an embodiment of the element of FIGS. 4-6;

[0322] FIG. 8 is a front view of another embodiment of the element of FIGS. 4-6;

[0323] FIG. 9 is a front view of another embodiment of the element of FIGS. 4-6;

[0324] FIGS. 10-17 are perspective views of steps of the method for the realization of the container of FIG. 1;

[0325] FIG. 18 is a schematic enlarged view of a detail of FIG. 10;

[0326] FIG. 19 is a schematic enlarged view of a detail of FIG. 11; and

[0327] FIG. 20 is a graph showing comparative tests between the container of the invention and a prior art container.

[0328] FIG. 1 shows a package 10 to be used in a container realized in accordance with the present invention. The package 10 has the shape of a rectangular parallelepiped and includes a box portion 14 and a lid portion 16. The parallelepiped defines a back wall 21, a front wall 22, a left side wall 23, a right side wall 24, a bottom wall 25 and a top wall 26.

[0329] The package further comprises a first right corner 27 and a second right corner 28 of the package 10. First right corner 27 is formed between the back wall 21 and the right side wall 24, while second right corner 28 is formed between the front wall 22 and the right side wall 24. The package 10 also comprises a first left corner 29 formed between the back wall 21 and the left side wall 23, and a second left corner 51 formed between the front wall 22 and the left side wall 23 (corner 29 is visible in FIG. 14).

[0330] The lid portion 16 is hinged about a hinge line 17 extending across a back wall of the parallelepiped. Further, the package 10 defines a housing or inner volume (not depicted in the drawings) containing for example a group of aerosol generating articles (not shown in the drawings). When the package 10 is closed, the lid portion 16 and the box portion 14 defines an opening line 19 which is the separation line between the lid portion and box portion. The opening line 19 is the geometrical continuation of the hinge line 17. The opening line 19 is formed on the left side wall 23, right side wall 24 and on the front wall 22.

[0331] The opening line 19 is a first weakened line, such as a cut, so that the package 10 can be opened immediately, or it may be perforated, and therefore the package 10 cannot be opened, unless the opening line is broken 19.

[0332] The package 10 is formed from a sheet blank 100 depicted in FIGS. 2 and 3. As illustrated in the lateral view of FIG. 3, the sheet blank 100 comprises a first cellulose based layer 30 comprising a cellulosic material. More preferably, the sheet blank consists in a first sheet of cellulose based material 30. In more detail, the first cellulose based layer 30 is formed from a sheet of a paper-based material. Preferably, the first cellulose based layer 30 has a basis weight comprised between 170 gsm and 270 gsm. Preferably, first cellulose based layer has thickness comprised between 170 micrometers and 400 micrometers.

[0333] The sheet blank 100 is folded as known in the field to form the package 10. Any geometrical shape of the package is possible.

[0334] The package 10 formed by suitably folding the sheet blank 100 is then wrapped using an outer wrapper in order to form a container 1 (shown in FIG. 17) to contain consumer goods (not shown), for example for containing aerosol generating articles.

[0335] The outer wrapper is formed from a sheet blank 101 depicted in FIGS. 4-9. In a first embodiment illustrated in FIG. 5, the sheet blank 101 comprises a second cellulose based layer 40 comprising a second cellulosic material, a first polymeric layer 41 and a second polymeric layer 42 both having heat sealing and moisture barrier properties. The second cellulose based layer 40 has an inner surface 44 and an outer surface 45. The first polymeric layer 41 covers the inner surface 44 of the second cellulose based layer 40 completely, as depicted in FIG. 4. The second polymeric layer 42 covers one or more portions of the outer surface 45 of the second cellulose based layer. The area covered by the portions on which the second polymeric layer is deposited is less than 30 percent of the total area of the outer surface 45.

[0336] In more detail, the second cellulose based layer 40 is formed from a sheet of a paper-based material. Preferably, the second cellulose based layer 40 has a basis weight comprised between 40 gsm and 70 gsm. Preferably, the second polymeric layer 42 has a basis weight comprised between 3 gsm and 15 gsm. Preferably, the first polymeric layer has a weight comprised between 4 gsm and 15 gsm. Preferably, the thickness of the second cellulose based layer 40 is comprised between 30 micrometers and 60 micrometers.

[0337] In a different embodiment depicted in FIG. 6, the sheet blank 101 forming the outer wrapper comprises a third polymeric layer 43. The third polymeric layer 43 is a moisture barrier layer. Preferably, the third polymeric layer is located between the inner surface 44 of the second cellulose based layer 40 and the first polymeric layer 41. Preferably, the third polymeric layer 43 has a basis weight comprised between 5 grams per square meter and 10 grams per square meter. In both embodiments of FIGS. 5 and 6, the second polymeric layer 42 is covering one or more portions of the outer surface 45 of the second cellulose based layer 40 according to preferred patterns. Possible embodiments of these patterns are depicted in FIGS. 7-9. The second polymeric layer preferably covers portions of the outer surface that, when the outer wrapper is wrapped around the package 10, correspond to portions at the top wall 26 or at the bottom wall 25 of the package. In FIGS. 7-9 the areas covered by the second polymeric layer are the grey areas. As visible, these areas are located in those portions of the blank 101, 101 that, when folded, covers the top wall or bottom wall of the package 10.

[0338] In order to form the container 1, the outer wrapper formed by blank sheet 101 is wrapped around the package 10 as shown in FIGS. 10-17. First, on the blank sheet 101 or 101, a second weakened line 48 is formed. The second weakened line 48 is formed on the blank sheet 101, 101 in such a way that, when the blank sheet 101, 101 is wrapped around the package 10, the second weakened line 48 is congruent to the opening line 19, as it is visible in FIGS. 15-17.

[0339] The second weakened line 48 may be manufactured with a laser scoring process or partial mechanical cutting of the second cellulose based layer 40 over its thickness without damaging the sealable and moisture barrier layers.

[0340] The second weakened line 48 is formed on the second cellulose based layer 40. The scoring is done on the outer surface 45 of the second cellulose based layer 40 which becomes the outer surface of the container 1. The depth of the scoring is controlled in order not to impact the moisture barrier properties of the third polymeric layer 43 or the heat sealable properties of the first polymeric based layer 41. The second weakened line 48 is not realized in areas of the outer surface 45 which are covered by the second polymeric layer 42.

[0341] Considering the scoring tolerances for both laser and mechanical processes and to have good functionality (ease of opening), the scoring depth is preferably between 50 percent to 80 percent of the thickness of the second cellulose based layer 40. For laser scoring 1000 watts CO.sub.2 laser may be used. Beam control of the laser may take place through a scanner. Process may be reel-to-reel with speed of 200 meters/minute.

[0342] In case of mechanical scoring, a rotary cutting unit may be used. The operation is performed inserting the second cellulose based layer between knife of the cutting unit and a blind counter roller. Distance between knife and counter roller is between 15 micrometers to 30 micrometers depending on the substrate.

[0343] In the FIGS. 10-19 only blank 101 is shown, however the same process applies to blank 101.

[0344] The sheet blank 101, 101 of the outer wrapper is put in abutment with the right side wall 24 of the package 10 (see FIG. 10). The sheet blank 101, 101 is positioned in such a way that the first polymeric layer 41 contacts the first cellulose based layer 40 at the right side wall 24. The first polymeric layer 41 is thus the inner layer of the outer wrapper and the second cellulose based layer 40 is the outer layer of the outer wrapper.

[0345] The enlarged view in FIG. 18 shows how blank 101 is applied to package 10, putting the blank into contact with the package. Two fold lines 102, 103 are formed in the sheet blank 101, corresponding to the location of the first and second right corners 27, 28 of the package 10. This is depicted in FIG. 11. The sheet blank 101 is then compressed against the side wall 24 as depicted by the arrows in the inlet of FIG. 19.

[0346] The blank sheet 101 is then folded at the two fold lines 102, 103, so that the front wall 22 and back wall 21 of the package 10 are also in contact with the outer wrapper. This is depicted in FIG. 12.

[0347] The package 10 is then preferably re-oriented in order to facilitate wrapping, for example the left side wall 23 may now face upwards, as shown in FIG. 13.

[0348] Two additional fold lines are then formed in the sheet blank 101, fold lines 104, 105, corresponding to the location of the first and second left corners 29, 51. The sheet blank 101 is then folded at the two fold lines 104, 105 and two opposite flaps of the sheet blank overlaps on the left side wall 23. This is depicted in FIG. 14. A panel of sheet blank 101 is formed thus on the left side wall 23, right side wall 24, front wall 22 and back wall 21 of package 10. In this way, the whole opening line 19 and the hinge line 17 are covered by the outer wrapper. The package 10 and outer wrapper are then preferably re-oriented, so that the front wall 22 now faces upwards, as shown in FIG. 15.

[0349] The sheet blank 101 is then folded in a known manner (called envelope folding) in order to cover top wall 26 and bottom wall 25 of the package 10. This is shown in FIGS. 16 and 17. In FIG. 17, the whole package 10 is covered by the outer wrapper, which form a panel on each wall of the package 10. The second weakened line 48 is located congruent to the opening line 19 located underneath.

[0350] Heat and pressure is applied to fix and join the outer wrapper to the package 10. For example, a temperature of 110 degrees Celsius, and a pressure of 1 Newton per square centimetre (N/cm.sup.2) are applied for a time of 100 milliseconds. These conditions provides a satisfactory seal and high adhesion.

EXAMPLE 1

Outer Wrapper

[0351] A first embodiment of sheet blank 101 is given.

[0352] The second cellulose based layer 40 is a 50 grams per square meter paper. The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0353] The composition of the first polymeric layer is as follows:

[0354] The composition forming the first polymer layer comprises: [0355] 40 percent in weight of an ethylene vinyl acetate copolymer having a vinyl acetate comonomer content of 18 percent by weight and a MFI (melt flow index) above 500 grams/minute at 190? C. and 2.16 kg weight (EVATANE 18-550 from SK Polymers); [0356] 35.6 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0357] 20 percent in weight of a paraffin wax (Parvan 1470 from Exxon Mobil); [0358] 4 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0359] 0.4 percent in weight of Pentaerythritol tetrakis (3,5-di-tert-butyl-4-hydroxyhydrocinnamate), such as Irganox 1010 (from BASF, CAS number 6683-19-8). This substance prevents unwanted degradation/oxidation of the hot-melt composition during processing.

[0360] This composition was prepared in sigma blade mixer at a temperature of 170? C.

[0361] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 11 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 2

Outer Wrapper

[0362] A second embodiment of sheet blank 101 is given.

[0363] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0364] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0365] The composition of the first polymeric layer is as follows:

[0366] The composition forming the first polymer layer comprises: [0367] 40 percent in weight of a low molecular weight polyethylene resin (Epolene C-15 from Westlake), this polymer has a MFI (melt flow index) above 4000 grams/minute; [0368] 25.8 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0369] 17 percent in weight of a Styrene Modified Polyterpene Resin (Sylvares 6100 from Kraton); [0370] 15 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0371] 2 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0372] 0.2 percent in weight of Irganox 1010 (from BASF).

[0373] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 8 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 3

Outer Wrapper

[0374] A third embodiment of sheet blank 101 is given.

[0375] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0376] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0377] The composition of the first polymeric layer is as follows: [0378] 39.9 percent in weight of Polyolefin Plastomer (Affinity GA1900 from Dow Inc.); [0379] 30 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0380] 20 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0381] 10 percent in weight of a Fischer-Tropsch wax (GTL Sarawax SX 105 from Shell); and [0382] 0.1 percent in weight of Irganox 1010 (from BASF).

[0383] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 4 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 4

Outer Wrapper

[0384] A fourth embodiment of sheet blank 10 is given.

[0385] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0386] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0387] The composition of the first polymeric layer is as follows:

[0388] The composition forming the first polymer layer comprises: [0389] 40 percent in weight of ethylene propylene copolymer with low crystallinity (Vistamaxx 8880 from Exxon); [0390] 25.8 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0391] 17 percent in weight of a Styrene Modified Polyterpene Resin (Sylvares 6100 from Kraton); [0392] 15 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0393] 2 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0394] 0.2 percent in weight of Irganox 1010 (from BASF).

[0395] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 6.5 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

[0396] This composition is similar to the composition of the Example 2, where the low molecular weight polyethylene is replaced with an ethylene propylene copolymer with low crystallinity (Vistamaxx 8880 from Exxon). This composition shows enhanced tackiness and flexibility at low temperature.

EXAMPLE 5

Outer Wrapper

[0397] A fifth embodiment of sheet blank 101 is given.

[0398] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0399] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0400] The composition of the first polymeric layer is as follows:

[0401] The composition forming the first polymer layer comprises: [0402] 40 percent in weight of low crystallinity resin obtained from the metallocene catalyzed polymerization of ethylene with octene (Affinity GA1900 from Dow Chemical Company); [0403] 25.8 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0404] 17 percent in weight of a Styrene Modified Polyterpene Resin (Sylvares 6100 from Kraton); [0405] 15 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0406] 2 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0407] 0.2 percent in weight of Irganox 1010 (from BASF).

[0408] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 12 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

[0409] This composition is similar to the composition of the Example 2, where the low molecular weight polyethylene is replaced with a low crystallinity resin obtained from the metallocene catalyzed polymerization of ethylene with octene (Affinity GA1900 from Dow Chemical Company). This composition shows enhanced flexibility.

EXAMPLE 6 Outer wrapper

[0410] A sixth embodiment of sheet blank 101 is given.

[0411] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0412] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0413] The composition of the first polymeric layer is as follows:

[0414] The composition forming the first polymer layer comprises: [0415] 40 percent in weight of amorphous polypropylene based polymer (Eastoflex E1060 from Eastman); [0416] 25.8 percent in weight of a C9 hydrogenated hydrocarbon resin (Novares Pure 1120 from Rain Carbon); [0417] 17 percent in weight of a Styrene Modified Polyterpene Resin (Sylvares 6100 from Kraton); [0418] 15 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0419] 2 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0420] 0.2 percent in weight of Irganox 1010 (from BASF).

[0421] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 16 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

[0422] This composition is similar to the composition of the Example 2, where the low molecular weight polyethylene is replaced with an amorphous polypropylene based polymer (Eastoflex E1060 from Eastman). This composition shows enhanced tackiness at low temperature.

EXAMPLE 7

Outer Wrapper

[0423] A seventh embodiment of sheet blank 101 is given.

[0424] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0425] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0426] The composition of the first polymeric layer is as follows:

[0427] The composition forming the first polymer layer comprises: [0428] 20 percent in weight of of Styrene Isoprene Copolymer (Kraton D1111 K from Kraton); [0429] 40 percent in weight of hydrogenated hydrocarbon resin (Eastotac? H-130 from Eastman); [0430] 20 percent in weight of polyterpene resin (Piccolyte S125 from DRT); [0431] 19.5 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); and [0432] 0,5 percent in weight of Irganox 1010.

[0433] This composition shows enhanced tackiness.

[0434] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 20 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 8

Outer Wrapper

[0435] A eighth embodiment of sheet blank 101 is given.

[0436] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0437] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0438] The composition of the first polymeric layer is as follows: percent in weight of Styrene Isoprene Copolymer (Kraton D1111 K from Kraton); [0439] 20 percent in weight of amorphous polypropylene based polymer (Eastoflex E1060 from Eastman); [0440] 20 percent in weight of low viscosity tackifying hydrocarbon resin (Escorez 5690 from Exxon Mobil Chemical); [0441] 20 percent in weight of hydrogenated hydrocarbon resin (Eastotac? H-130 from Eastman); [0442] 16.5 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); [0443] 3 percent in weight of a microcrystalline PE wax (Multiwax 180-MH from Sonneborn); and [0444] 0.5 percent in weight of Irganox 1010.

[0445] The composition shows high tackiness.

[0446] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 13 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 9

Outer Wrapper

[0447] A ninth embodiment of sheet blank 101 is given.

[0448] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0449] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0450] The composition of the first polymeric layer is as follows: [0451] 20 percent in weight of hydrogenated ethylene norbornene polymer (TOPAS 8007F-600 from Topas); [0452] 40 percent in weight of hydrogenated hydrocarbon resin (Eastotac? H-130 from Eastman); [0453] 20 percent in weight of amorphous polypropylene based polymer (Eastoflex E1060 from Eastman); [0454] 19.9 percent in weight of paraffin wax (Parvan 1470 from Exxon Mobil); and [0455] 0.1 percent of Irganox 1010.

[0456] This composition shows low tackiness and high viscosity.

[0457] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 5 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

EXAMPLE 10

Outer Wrapper

[0458] A tenth embodiment of sheet blank 101 is given.

[0459] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0460] The whole inner surface of the paper is coated with the first polymeric layer (15 grams per square meter) using slot-die or curtain coating processes. The current technique allow conveniently applying uniform, thin and defect free layers on fiber-based substrates.

[0461] The composition of the first polymeric layer is as follows: [0462] 10 percent in weight of Styrene Ethylene Butylene Copolymer (Kraton G1657 from Kraton); [0463] 10 percent in weight of a low crystallinity resin obtained from the metallocene catalyzed polymerization of ethylene with octene (Affinity EG8200G from Dow Chemical Company); [0464] 39.9 percent in weight of hydrogenated hydrocarbon resin (Regalite R1125 from Eastman); [0465] 20 percent in weight of paraffin wax having a melting point comprised between 51? C. and 54? C. (Parvan 1270 from Exxon Mobil); [0466] 20 percent in weight of paraffin wax having a melting point comprised between 62? C. and 65? C. (Parvan 1470 from Exxon Mobil); [0467] 0.1 percent in weight of Irganox 1010.

[0468] This composition shows high tackiness toward paper and high viscosity.

[0469] The resulting coated paperboard (sheet blank 101) has a moisture permeability of 8 grams/m2/day at 38? C. and 90% RH (determined by ISO 2528:1995).

[0470] Coated multilayer materials according to example 1-10, have been coated on the outer surface with the second polymeric layer (heat sealable layer). The second polymeric layer comprises ethylene vinyl acetate based hot-melt sealant. The second polymeric layer has been deposited according to the pattern of FIG. 7. The composition of the second polymeric layer is identical to the composition of the first polymeric layer as described in Example 1.

EXAMPLE 11

Outer Wrapper

[0471] A first embodiment of sheet blank 101 is given.

[0472] The second cellulose based layer 40 is a 50 grams per square meter paper.

[0473] The whole inner surface of the paper is coated with the third polymeric layer (10 grams per square meter) using coating processes.

[0474] The composition of the third polymeric layer (moisture barrier layer) is as follows: [0475] 40 percent in weight of a high density polyethylene wax (Excerex 40800 from Mitsui); [0476] 30 percent in weight of hydrogenated hydrocarbon resin (Eastotac? H-130 from Eastman); [0477] 20 percent in weight of a low crystallinity ethylene propylene copolymer (Vistamaxx 8880 from Exxon); [0478] 9.9 percent in weight Paraffin Wax (Parvan 1470 from Exxon Mobil); [0479] 0.1 percent in weight of Irganox 1010 from BASF.

[0480] This intermediate material did show a permeability of 8 grams/m2/day and did not show any tackiness nor thermoplastic behavior below 100? C.

[0481] The material above was coated with a 6 gsm of the first polymeric layer having the same composition described in Example 1. This first polymeric layer was applied by curtain coating. Moreover, the material was provided with the second polymeric layer according to the pattern of FIG. 7. The composition of the second polymeric layer is the composition detailed for the first polymeric layer in Example 1.

[0482] The final moisture permeability of the multilayer blank 101 is 6 grams/m2/day.

Comparative Example

[0483] Comparative Example has been made comparing the performances of the following containers:

[0484] Comparative container (BOPP film): 20 cigarettes hinge lid packages formed by a lacquered 180-270 gsm paperboard and wrapped with 16 micrometers BOPP film. This container A is represented as a continuous line in FIG. 20.

[0485] Container of the invention (Paper Barrier): 20 cigarettes packages were prepared with hinge lid packages made of the sheet blank 100. This blank 100 is made of a 240 gsm (298 microns thick) bleached cellulose pulp (SBS) paperboard (tradename Invercote L PM, produced by IGGESUND PAPERBOARD AB). The hinge lid is then wrapped with sheet blank 101 realized according to Example 3. This container is represented as a dashed line in FIG. 20.

[0486] Container BOPP and the container of the invention were placed in climatic chambers to simulate extreme environmental conditions, humidity uptake or loss was monitored via Oven Volatiles Method.

[0487] The graph of FIG. 20 shows that the containers according to the invention have a moisture intake or loss similar to comparative container packed in BOPP film.

[0488] Oven Volatiles (OV in the drawings) were measured according to method: DETERMINATION OF MOISTURE CONTENT (OVEN VOLATILES) OF TOBACCO AND TOBACCO PRODUCTS, CORESTA Recommended Method 76 (published in July 2017 No. https://www.coresta.org/sites/default/files/technical documents/main/CRM 76-July2017.

[0489] The results are shown in FIGS. 14 and 15.

[0490] In FIG. 20, the conditions jungle are applied. The container BOPP and the container of the invention are kept at a temperature of 32 degrees Celsius and a relative humidity of 85 percent. Container BOPP and container of the invention, as shown by the solid line and dashed line, have a very similar behaviour, that is the oven volatiles slowly increase within 90 days.

[0491] For the purpose of the present description and of the appended claims, except where otherwise indicated, all numbers expressing amounts, quantities, percentages, and so forth, are to be understood as being modified in all instances by the term about. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein. In this context, therefore, a number A is understood as A?10 percent of A. Within this context, a number A may be considered to include numerical values that are within general standard error for the measurement of the property that the number A represents. The number A, in some instances as used in the appended claims, may deviate by the percentages enumerated above provided that the amount by which A deviates does not materially affect the basic and novel characteristic(s) of the claimed invention. Also, all ranges include the maximum and minimum points disclosed and include any intermediate ranges therein, which may or may not be specifically enumerated herein.