ES2387452T3 - Packaging with humidity control - Google Patents

Abstract

A package (1) having a laminate structure comprising: first and second polymeric layers (6.8); and a layer (7) that contains moisture interposed between the polymeric layers, whose wet-containing layer is intended to transfer moisture into a container formed by the packaging, characterized in that a part of the first layer (6) is removable with the in order to expose a corresponding part of the stratum that contains moisture inside the container.

Description

Packaging with humidity control

The present invention relates to packages that have a structure that allows their contents to be kept moist, and in particular a container for use with tobacco products.

Tobacco in products such as cigarettes, pure cigars and loose tobacco for pipe smoking or cigarettes for rolling them one pampering is prone to dry both during the pre-storage period before use and in particular after the packaging has been opened product. This is not convenient, because tobacco loses flavor when dried.

Pure expensive cigarettes are normally stored in humidifiers specially designed to specifically solve this problem by keeping them at a predicted level of moisture to prevent them from drying out. Consumers of loose tobacco often use a more rudimentary concept; a piece of apple or potato skin placed in the flask or tobacco can help keep the tobacco moist

or you can rewet the tobacco that has become too dry. However, this method could not be considered hygienic, and could alter tobacco with unwanted perfumes or flavors.

Therefore, various humidification devices and moisture dispensers have been proposed for use with tobacco products, in particular for use in flasks and in cans and packs of cigarettes. Typically, the devices comprise a source of moisture that can emit water vapor that is surrounded by a permeable envelope such as a housing, a box, a stratum or a flask that keeps the source of moisture separate from tobacco but allows steam of water is transmitted to tobacco. The source of moisture is often some form of heat absorbing medium such as cotton wool, blotting paper, floral foam, or a polyacrylamide gel or crystals, which are moistened with water or with a saline solution. The permeable envelope could be rigid or flexible and could be made permeable by providing perforations or openings therein, or it could be an inherently permeable membrane material.

Since these humidification devices or moisture dispensers have been designed as objects to be inserted in a tobacco container, they could easily be lost in daily use. In addition, the objects are generally in direct contact with the tobacco itself, which could hide the distribution of moisture to all parts of the tobacco, and cause discomfort to a consumer who needs to separate the object from the tobacco when he takes it from the container.

A solution to this problem has been to incorporate means of providing humidification to the tobacco packaging itself. However, this can lead to undesirable shapes and sizes of the packages. In addition, such objects could have a relatively localized humidifying effect, with intense humidification obtained very close to the source of moisture, but a weaker effect being observed farther from the source.

The specification of the UK patent number GB 1,369,992 discloses a tobacco package having a moisture-containing layer enclosed within an outer polypropylene film and an inner polystyrene film, such that the unit can humidify the tobacco through the polystyrene film.

The German utility model DE 8,715,315 discloses a structure in which a fixation can be attached to an inner layer of a package that has a moisture layer covered with fabric, the moisture being transferable to the tobacco of the package through perforations practiced on the web.

An object of the present invention is to provide a container for tobacco products that has a structure that allows ease of use, and an effective humidification is provided to its contents. However, it should be noted that the container of the present invention is equally useful for storing non-tobacco products when humidification is required.

According to one aspect of the present invention, a packaging having a stratified structure comprising first and second polymer layers and a moisture-containing layer interposed between the polymer layers has been provided, the moisture-containing layer for moisture transfer being arranged inside a container formed by the packaging.

A laminate design can be lightweight and flexible and allows the packaging to be rolled or folded for easy transport and storage as a result. Additionally, the laminate structure means that moisture can be distributed through a layer of the packaging instead of being located, so that the shape of the packaging is more convenient for a consumer, without the consequent loss in humidifying effect. The design of the laminate can also be reinforced, with elastic material for use in packaging where it is important to protect the shape of its contents, such as cigarettes.

A fraction of the first polymer layer could be removable in order to expose the corresponding part of the layer containing moisture inside the container.

The removable parts could be in the form of a tear strip, which is defined by a perimeter of lower resistance in the first stratum, and is easily removed in order to allow moisture to move from the moisture-containing stratum to the container contents. .

The packaging could comprise a plurality of tear-off strips, and the moisture-containing stratum could contain a plurality of partitions corresponding to the tear-off strips of the first stratum. This allows a finer control of the humidifying effect provided by the packaging because the moisture can be controllable to the contents of the container over the duration of the contents of the packaging.

Each of the tear-off strips could have a different size, such that, for example, a large strip can be removed when the container contains a large amount of product, and smaller strips are successively removed as the product leaves using.

The packaging could further comprise a unidirectional semipermeable layer between the first polymer layer and the moisture-containing layer to prevent the migration of moisture from inside the container to the moisture-containing layer but to allow the migration of moisture from the layer that Contains moisture inside the container. This prevents moisture contamination in the moisture-containing stratum through the elements in association with the conduit product contained in the container, without reducing the effect of a humidifier.

The first polymer layer itself could be a semi-permeable one-way stratum or a porous stratum., Such that the moisture-containing stratum can keep the container and its contents at an expected level of humidity without any interaction by the consumer , such as the removal of parts of the stratified material.

The first or second polymer layer could be formed from a material selected from: polyethylene, polypropylene, polystyrene, polyethylene terephthalate and polylactic acid.

The moisture-containing layer could comprise an element containing moisture impregnated with water. The moisture-containing element could be formed from a material selected from: paper, microcrystalline cellulose, Psyllium peel, saturated silica gel, starch gels, pectins, natural sponge, synthetic sponge, clay materials, gelatin, agar-agar , cellulosic gum, and alginates. If the element that contains moisture is paper, it could have a matrix shape, comprising polyacrylamide crystals.

The first and second polymer strata could be impermeable to prevent contamination of the environmental product in the container.

The packaging could contain a moisture indicator, to give an orientation to a consumer as to when parts of the first stratum should be removed to expose the moisture inside the container.

The packaging could be charged with tobacco products or smoking articles. As used herein, the term "smoking article" includes smoking products such as cigarettes, cigars whether they are based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes and also products that burn but do not burn. The term "tobacco product" refers to any item manufactured in or sold by the tobacco industry, mainly including a) cigarettes, cigars, pipe tobacco

or cigarettes that the consumer himself bundles, (whether based on tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes;) and b) I non-smoking products incorporating tobacco, tobacco derivatives, expanded tobacco, reconstituted tobacco or tobacco substitutes such as insufflation tobacco leaves. Snus, hard tobacco and products that heat up but don't burn. . This list is not intended to be exclusive but simply illustrates a range of products that can be manufactured and sold in the tobacco industry.

Embodiments of the present invention are described below by way of example only, with reference to the following drawings, of which:

Figure 1 shows an example of a tobacco flask;

Figure 2 shows the laminate structure of the packaging used to form the tobacco flask of Figure 1, according to an embodiment of the invention;

Figure 3 shows an example of a tear strip in the first polyethylene layer of the laminate structure of Figure 2;

Figure 4 shows the part of the first polyethylene layer of Figure 3 with the tear strip removed; Figure 5 shows the position of the tear strip of Figure 3 inside the tobacco flask according to the present invention;

Figure 6 shows a further embodiment of the inside of a tobacco flask according to the present invention;

Figure 7 presents a further embodiment of the laminate structure of a tobacco flask according to the present invention;

Figure 8 shows a further embodiment of the inside of a tobacco flask according to the present invention;

Figure 9 shows a hinged package according to a further embodiment of the invention; Y

Figure 10 shows a hinged lid package according to a further embodiment of the invention.

Figure 1 shows an example of a flask 1 for tobacco. The flask 1 has a containment part 2 in which

10 tobacco 3 is stored, and has a flap 4o that can be used to close the flask 1. The flap 4 contains an adhesive part 5 that allows the flask 1 to be re-sealed after use, although it will be appreciated that they could use various mechanisms to close the flask 1 after use all of which are applicable to the present invention.

The flask 1 is flexible, which allows it to bend or roll, and is substantially impermeable.

Figure 2 shows a cross-section, taken along the line XY through the rear wall of the flask 1 shown in Figure one, illustrating the structure of the packaging material used according to an embodiment of the present invention. The wall of the flask has a stratified structure comprising first and second polymer layers 6, .8, and a layer 7 containing moisture interposed between the first and second layers 6, .8.

In this embodiment, the polymeric materials are made of polyethylene. The first polyethylene layer 6 forms the inside of the flask 1, and the second polyethylene layer 8 forms the outside of the flask 1. The polyethylene strata 6, 8 are impermeable, such that the moisture of the layer 7 which Contains moisture is confined to the structure of this laminate.

The layer 7 containing moisture is made of paper, which has been impregnated with water during manufacturing

25 of the flask. In this embodiment, the paper layer has been impregnated with 10 g of water, and the flask is intended to contain approximately 50 g of tobacco.

Figure 5 shows a plan view of an area 9 nine of the first polyethylene layer 6 of the flask 1, which forms the inside of the flask. A part of the stratum comprises a tear strip 10, which is defined by a perimeter of lower mechanical resistance (by means, for example of small perforations) and a part of

30 tab 12 which allows the tear strip 10 to be removed from the stratum 6 when it is pulled.

Figure 4 shows a plan view of the same area 9 of the first layer 6 of polyethylene shown in Figure 3, with the tear strip 10 removed. The moisture-containing layer 7 is exposed when the first polyethylene layer 6 has been removed.

When a part of the first polyethylene layer 6 has been removed, a corresponding part of the layer 7 which is

35 exposed to the inside of the flask 1. The humility of the stratum 7 that contains moisture is then free to migrate into the flask 1, where it can hydrate the tobacco 3 is stored in the containment part 2.

Figure 5 shows an example of the position of the tear strip 10 inside the flask 1 in this embodiment, although it should be noted that the invention is not limited to this arrangement, and that the strip 10 can be arranged in any preferred location or orientation, horizontally or vertically or at an angle with 40 to a dimension of the flask 1. The strip should preferably be positioned such that it is not too close to the opening of the flask 1, in order to avoid loss unnecessary humidity to the environment when flap 4 is opened. A number of strips of different shapes, such as rectangular, can also be used

or circular, or a more complex pattern. The tongue part 12 must be easy for a consumer to access, and should be positioned such that, if the flask 1 is rolled or folded after use, the migration of

Water from the exposed part of the stratum 7 that contains moisture to the tobacco 3 is not unnecessarily hidden, so that a strong humidifying effect can be achieved.

The moisture-containing layer 7 can be formed from any material that is capable of storing, containing or otherwise providing a quantity or reservoir of wetting liquid such as water, and releasing the water as a vapor, preferably at room temperature. Water is a substance particularly suitable for the wetting of tobacco, but other substances with properties suitable for the necessary may be used.

storage and release of steam. The paper layer indicated above preferably has the form of a matrix in which crystals or polyacrylamide granules can be incorporated. .

A further example of suitable material for moisture release layer 7 is one or more alginates. These materials are linear copolymers produced by various brown algae, including sea weed (such as laminaria) and bacteria (such as the Azotobacter species), which are insoluble in water but absorb water very quickly. The alginates are fully biocompatible and are used in consumable products, so they are a particularly attractive option for tobacco storage.

Additional examples of suitable materials are microcrystalline cellulose, Psyllium husks, saturated silica gel, rice, starch gels, pectins, natural sponge, synthetic sponge, clay materials such as sepolite and bentonite, gelatin, agar-agar and modified cellulosic gum. .. Combinations of these materials could also be used. A gel could be configured to release moisture at a controlled rate, and it could also be adapted to release heat as well as moisture.

However, the invention is not limited to these particular examples of materials for the moisture-containing layer. Any material that has the necessary properties can be used to allow it to absorb an adequate amount of liquid such as water and then release the liquid as vapor by evaporation.

A selection of moisture-containing material that is appropriate for the particular application of the flask 1 can be made. When the flask 1 is intended to be folded or rolled up, structural flexibility could be an important factor, and therefore more materials can be avoided. rigid. Conversely, when structural rigidity is preferred, for the storage of cigarettes or pre-rolled tobacco, for example, a more elastic material can be selected for the laminate structure.

If water is used to provide the unit, it does not need to be running water. An aqueous salt solution can be used instead that can give control over evaporation by determining the humidity of the surrounding environment below which water vapor will be released. Alternatively, other volatile liquid ingredients such as glycerol (glycerin) or propylene glycol could be used; These materials also control the evaporation of water.

Additionally or alternatively, the moisture-releasing element could also contain one or more water-soluble additives that can be transported through the unidirectional membrane by water vapor and hence discharged into tobacco. These may include materials with flavors and fragrances. For example, a moisture-releasing element containing mentor can be used to impart a mentor flavor and a smell of tobacco. Similarly, several flavors such as vanilla, coffee and other flavors could be provided. In this way, the consumer has a mechanism to flavor a tobacco product with a flavor of their choice.

The tear strip 10 of the first layer 6 of polyethylene has been designed to have a shape and position in the tobacco flask 1 so that the humidifying effects of the moisture-containing layer can be optimized. For example, in Figure 5, the strip is shown positioned in such a way that it is not in direct contact with tobacco 3, whereby a good distribution of the humidifying effect can be achieved.

One of the main factors that must be taken into account to optimize the humidifying effect is the period of time over which the effect has to be observed. Preferably, this period is designed to coincide with the period of use of the tobacco product 3 in the flask 1, such that the tobacco 3 can be kept moist until everything has been used. However, excessive amounts of moisture in the laminate structure should be avoided if the weight of the flask 1 should be reduced and flexibility increased.

For the embodiment described above, 10 g of water in the layer 7 containing moisture are sufficient to hydrate approximately 50 g of tobacco over a period of use by a moderate smoker, through an opening made in the first layer 6 of polyethylene of approximately 2.5 cm.,.

The duration of the humidifying effect can be controlled by a number of factors. First, the amount of steam incorporated into the laminate structure can be controlled during the manufacture of the tobacco flask 1 in such a way that it responds to a particular flask size, or at an expected rate of drying of the products. Secondly, the amount of moisture-containing layer 7 that is exposed to the inside of the flask can be controlled in various ways, as described below.

In a further embodiment of the present invention, shown in Figure 6, a plurality of tear strips 13 a, 13b, 13c is incorporated into the first layer 6 of polyethylene of the flask 1. Each strip can be stripped and individually stripped from the structure stratified in the same way described above, and therefore a consumer can peel and tear each strip at convenient times. For example, a strip can be torn every two days in order to obtain a renewed humidifying effect in the flask 1.

Each individual tear strip 13 a, 13b, 13c may be of a different size (which has not been shown). As an example, a tear strip can be provided as the first strip to be removed in the lifetime of tobacco product 3, when most of the tobacco contained within the flask exists. Subsequently, smaller strips can then be torn over time, to provide an additional, but smaller, moisture effect as the amount of remaining tobacco 3 is reduced in flask 1.

As an alternative to tear strips, perforations could be made in the first polyethylene layer in predetermined locations and covered with removable cover parts adhered to the polymeric material around the perforation. These lid parts could then be removed in the same manner as the tear-off strips described above, in order to expose the moisture-containing layer to the tobacco product. As an additional alternative to tear-off strips, strips that can be hermetically resealed can be used that could be reapplied to the first polyethylene layer as desired in order to hermetically seal the moisture-containing layer. This would allow a consumer to have more control of the humidifying effect provided by the moisture-retaining stratum. For example, as tobacco products are used, it may no longer be necessary to provide the same level of humidification as that provided when the flask was full.

In a further embodiment, shown in Figure 7, the laminate structure of the flask comprises an additional layer 14 between the moisture-containing layer 7 and the first polyethylene layer 6. This additional layer is a semi-permeable unidirectional membrane 14 that allows water vapor to migrate from the layer 7 that contains moisture to the tobacco products 3 in the flask 1, but which prevents water vapor from migrating in the opposite direction. This is advantageous in applications where it is convenient to keep stratum 7 that contains moisture free of contaminants that could be collected from the environment and subsequently released to tobacco 3.

An advantage of using a semi-permeable layer in this way is that it prevents the moisture-containing layer from absorbing moisture from the tobacco product 3 after most of the water contained in the paper layer has already been released (for example, after removal a tear strip), which if not, could dry the tobacco 3. The inability of the stratum 7 that contains moisture to reabsorb water in this embodiment means that it cannot absorb the taste of tobacco, which would otherwise be inconvenient. In addition, the membrane 14 prevents the paper of the moisture-containing layer 7 from adopting any form of brown staining.

The unidirectional semipermeable membrane 14 could comprise a reverse osmosis membrane, such as a synthetic dialysis membrane or other food grade pharmaceutical membrane. Suitable membrane materials include cellulose acetate, polysulfones or polyvinyl fluoride. However, any material with the desired property of unidirectional steam transmission from the moisture releasing element could be used.

However, in an alternative embodiment, instead of using a unidirectional semipermeable membrane 14, a porous or fully permeable bidirectional membrane could be used. This embodiment would be particularly applicable to situations in which tobacco has to be transferred between a series of different humidity environments, so it is desirable that there is flexibility in the direction of moisture transfer. By allowing moisture to be transferred from tobacco to stratum 7 which it contains in wet conditions, excessive damping of tobacco can be avoided, while in dry conditions, the equilibrium of the system would change so that moisture was transferred to tobacco in order to keep it at an expected humidity level.

The selection between the use of a unidirectional semipermeable membrane and a fully permeable membrane can therefore be made based on the intended use of the packaging.

The laminate structure of Figures 2 and 7 can be applied to the tobacco flask 1 in its entirety, in other words, to all parts of the flask or only to specific parts such as the front and back sides of a flask substantially flat. The design can be done with a view to the flexibility and expected weight of the packaging, and also to the amount of tobacco 3 to be stored and at its expected rate of use. For example, the moisture-containing stratum can be designed to extend across all parts of the flask walls, it can be confined to a limited area, with the flask walls formed only of polymeric material in areas where there is no there is a layer that contains moisture.

When a part of the layer 7 containing moisture is exposed to the tobacco product, water is drawn along the paper layer to the part exposed by osmosis as it evaporates in the flask 1. Consequently, the water can be aspirating from all parts of the flask 1 to reach a relatively small part corresponding to a tear strip 12. In an alternative embodiment, however, the moisture-containing layer 7 can be partitioned to correspond to each of a plurality of tear strips 13 a, 13b, 13c, so that as each strip is removed, the only water that is available to migrate to tobacco 3 is that contained within a corresponding partitioned part of the layer 7 that contains moisture. This arrangement can be effective when the rate of use of tobacco 3 is expected to be small, such that the humidifying effect can be controlled and prolonged in accordance with those conditions.

The second polyethylene layer 8 can be printed to contain the manufacturer's brand and product information. The paper of the moisture-containing layer 7 is preferably colored white, to provide adequate backing to the second polyethylene layer 8, and to prevent the tobacco dye on the first polyethylene layer 6 from being visible through the outside of the flask. one.

The tobacco flask 1 according to embodiments of the present invention can be manufactured a part of the first layer 6 is already removed polyethylene, such that a corresponding part of the moisture retaining layer 7 is exposed to the tobacco 3 in an initial stage. This allows tobacco 3 to remain wet during transport or storage in a retail store before use.

In one embodiment of the present invention, a moisture indicator may be included in the tobacco flask 1, to give an orientation to a consumer. This could be uniquely useful when the flask 1 contains a plurality of tear strips 13 a, 13b, 13c because guidance can be given as to when individual strips should be removed. The indicator can be any type of compact humidity measurement device or a sensor that gives a visual indication of the humidity level. A convenient example is a paper or cardboard device comprising one or more sensor areas of a water-sensitive material that absorbs moisture from the atmosphere and changes color according to whether the humidity is above or below any value. threshold A range of sensor areas that have different threshold values could be provided, to give a visual age scale from which the consumer can make a decision as to whether their tobacco product is sufficiently moist.

In a further embodiment of the present invention, shown in Figure 8, the first polyethylene layer 6 itself contains a unidirectional semipermeable membrane portion 15 that allows water vapor to migrate from the layer 7 containing moisture to the products 3 of tobacco in the flask one, but prevents water vapor from migrating in the opposite direction. By forming the semipermeable part 15 in the first polyethylene layer 6 itself, a reduction in the size and weight of the packaging can be obtained avoiding the need to form an additional semipermeable layer on the first polyethylene layer 6. As described above, the unidirectional semipermeable membrane could be replaced by a porous or permeable membrane when desired.

The permeable or semipermeable part 15 of the stratum 6b is made of polyethylene could be of any appropriate size, depending on the expected moisture exposure to the tobacco products 3 of the flask 1. Part 15 could form the entire interior of the flask 1 when a higher degree of moisture transfer is required.

Through the use of said permeable or semipermeable part, the moisture-containing layer. It can keep the flask and its contents at a predicted level of humidity without any interaction by the consumer, such as the removal of parts of the stratified material.

It is possible to use a plurality of semipermeable or permeable or porous parts in the flask, evenly distributed through the inside of the flask 1 or located in a particular region, such as the center, in order to maximize the moisture transfer performance . It is also possible to use a combination of semipermeable, permeable or porous parts and tear-off strips with 10 removable strips (as described in the previous embodiments), in order to promote a level of humidification base that does not require control by the user, but to provide an option of a “high level” humidification effect through the removal of the tear strips, to be used in drier conditions Below the tear strip 10 may be either the layer 7 which It contains moisture or a membrane 14 in contact with the layer 7 which contains moisture as described in the previous embodiments.

The first and second 6.8 layers of polyethylene do not need to be made of the same material with each other. The materials are typically plastic materials, and polypropylene, polystyrene, polyethylene terephthalate and polylactic acid could be used as an alternative to polyethylene. Preferably, the outer stratum of a tobacco flask 1 should be recyclable or biodegradable, he said while preventing moisture release from the stratum that contains moisture to the environment. The inner layer of the tobacco flask should be easy to dispose in tear-off strips, which are sufficiently tightly connected with an inner layer to present a tight seal tight to the layer 7 that contains moisture, but which can be separated along what perforated perimeters 11 or preformed or less resistant lines without excessive force.

When the tobacco product to be contained in the packaging is in the form of a cigarette, or a pure cigar, instead of loose tobacco, the flask described above may form an inner shell 17 in a package 16 having a rigid outer frame 18, for example as shown in Figure 9. The walls of the outer frame 18 of the package could be made of an elastic, rigid material, such as cardboard or plastic or a similar material that demonstrates the rigidity required for a package hinged lid, for example, as shown in figure 9, in order to protect its contents. The inner shell 17 is inserted into the outer frame 18 during the manufacturing process, and could either be attached to the outer frame 18 by an adhesive, or it could be partially or totally removable from the outer frame 18 during use to facilitate the removal of tear strips 19 (shown at the top of the inner shell 17 by way of example only) or user control of the humidifying effects mentioned above. In Figure 9, the inner shell 17 has been shown extending partially from the hinged lid open packaging 16.

In an alternative embodiment, the structure of the laminate packaging of the invention could be used either as a part, or as the entire outer frame 20 of a hinged lid cigarette pack or a box as shown in the figure. 10, where there is no inner envelope. The second polyethylene layer 8, in this embodiment, would form the outer packaging, while the first polyethylene layer 6 would be exposed to the cigarettes contained by the packaging, in the same manner described above. The moisture-containing layer 7 could be exposed by removing a tear strip 21, but a membrane could be used as described above. The layers 6, .8 of polyethylene, in addition to demonstrating the resistance and

10 moisture permeabilities required could be reinforced with a suitable elastic material to maintain the shape of the packaging required to protect the contents of the package.

It should be noted that the laminate structure of the described packaging can be formed from a series of different containers, such as flexible pouches with a bag-like appearance, and stiffer flasks such as bags, boxes or hinged lid packages for cigarettes, pure cigars and similar products, being present in each

15 one the moisture transfer operation from the laminate structure.

It should also be noted that the packaging of the present invention can be used to store any product that requires hydration during storage, and not just tobacco.

Claims (14)

1. A package (1) having a laminate structure comprising:  first and second polymeric strata (6.8); Y. a layer (7) containing moisture interposed between the polymeric layers, whose layer containing moisture is intended to transfer moisture into a container formed by the packaging. characterized in that a part of the first layer (6) is removable in order to expose a corresponding part of the layer that contains moisture inside the container. 2. A packaging according to claim 1, wherein the removable part is a tear strip (10) defined by a perimeter of lower resistance (11) in the first layer (6). 3. A package according to claim 2 comprising a plurality of tear-off strips (13 a, 13b, 13c), wherein the moisture-containing layer (7) has a plurality of partitions corresponding to the tear-off strips in the first layer . 4. A package according to claim 3, wherein each of the plurality of tear strips (13 a, 13b, 13c) has a different size. 5. A packaging according to any of the preceding claims, further comprising a unidirectional semipermeable layer (14) between the first polymeric layer (6) and the moisture-containing layer (7) to prevent moisture migration from the interior of the container to the stratum that contains moisture, but to allow moisture migration of the stratum that contains moisture into the container.

6.

 A packaging according to any of the preceding claims, wherein the first and second layers (6,8) are waterproof.

7.

 A package according to any of the preceding claims, wherein a part of the first polymeric layer (6) is a unidirectional semipermeable membrane (15) designed to prevent moisture migration from inside the container to the moisture-containing layer (7) but to allow the migration of moisture from the layer that contains moisture to the interior of the container.

8.

 A packaging according to any of the preceding claims, wherein the first polymeric layer (6) is a permeable material.

9.

 A package according to any one of the preceding claims, wherein the polymeric layers first

or second (6.8) have been formed from a material selected from polyethylene, polypropylene, polyethylene terephthalate polystyrene and polylactic acid. 10. A package according to any one of the preceding claims, wherein the moisture-containing layer (7) comprises a moisture-containing element impregnated with water. 11. A packaging according to claim 10, wherein the moisture-containing element (7) is formed of a material selected from paper, microcrystalline cellulose, Psyllium husks, saturated silica gel, rice, starch gels, pectins, natural sponge, synthetic sponge, clay materials, gelatin, agar-agar, cellulosic gum, and alginates. 12. A package according to claim 10, wherein the paper is in the form of a matrix, comprising polyacrylamide crystals. A package according to any of the preceding claims, which contains a moisture indicator.

14.

 A packaging according to any of the preceding claims, to contain a consumable product, wherein the product could be a tobacco product (3).

fifteen.

 A package according to claim 14, arranged as a flask, containing a tobacco product, or wherein the laminate structure is elastic and the packaging is arranged as a package containing a tobacco product.

FIGURE 1  FIGURE 2   FIGURE 3  FIGURE 4     FIGURE 7    FIGURE 9   FIGURE 10