Coating comprising a matrix housing a capsule and device comprising such a coating

Abstract

The invention relates to a coating (1) comprising a matrix (2) housing at least one capsule (3), preferably a plurality of capsules (3). The capsules (3) contain any one of at least one odorous product (5a) and / or a treating product (5b). The invention also relates to a spectacle element that is part of a pair of spectacles and which comprises such a coating (1). The invention also relates to a method for diffusing any one of the odorous products (5a) and / or the treating products (5b), which method comprises a step of rubbing the coating (1), for example with a user's finger, or of simply wearing the pair of spectacles if the coating (1) covers the temple tips of the pair of spectacles that naturally rest on the user's ears.

Description

[0001] COATING COMPRISING A MATRIX HOUSING A CAPSULE AND DEVICE COMPRISING SUCH A COATING

[0002] The invention relates to a coating comprising a matrix housing a capsule containing a product. It also relates to a device comprising such a coating. It also relates to an eyeglass element comprising such a coating. It also relates to a pair of eyeglasses comprising at least one such eyeglass element. It also relates to a method for producing such a coating. It also relates to a method for releasing the product.

[0003] In many everyday situations, it is desirable to be able to release a product, such as a treatment product or a fragrance product, at a given moment. The treatment product is, for example, a product intended to repel insects and the fragrance product is, for example, a fragrance intended to enhance a situation or the user's well-being.

[0004] To avoid wasting product, it is desirable to be able to release the product very quickly, very simply, and at the right time.

[0005] Vaporizers are known that are capable of dispensing a product by a user pressing a button that releases a quantity of product contained in a reserve. Such a system is complex, heavy and bulky. In addition, such a system can be difficult to use for very young or even very old users. Furthermore, such a system is not always available within reach of the user, which can delay and ultimately spoil its use at the appropriate time.

[0006] There is therefore a particular need today for an alternative that allows a product to be released very quickly, very simply and at the right time.

[0007] Thus, one aim of the present invention is to propose a coating which allows a product to be released very quickly, in a few seconds in particular, very simply and at the right time.

[0008] Considering the above, one problem that the present invention seeks to solve is in particular to enable users to have a coating that allows a product to be released very quickly, very simply and at the right time.

[0009] The solution to this problem posed has as its first object a coating comprising a matrix housing at least one capsule, characterized in that the capsule contains at least one of an odorous product and / or a treatment product.

[0010] Another subject of the invention is a device and in particular a spectacle element which constitutes a pair of spectacles and which comprises a coating according to the invention, in other words, the coating at least partially covers said device or is the material mainly constituting said device.

[0011] Its additional objects are: devices which are paper or film label supports, for example labels for wine or perfume bottles, devices which are supports made of natural, vegan or synthetic leather, for example leather goods, devices which are gel-coats, paints, or varnishes, for the microencapsulation of active ingredients, devices which are hair clips or barrettes, preferably made of polymer, for the microencapsulation of active ingredients and / or fragrances, odors.

[0012] Another subject of the invention is a device which is a pair of glasses comprising at least one eyeglass element according to the invention.

[0013] Its other subject is a method for producing a coating according to the invention, characterized in that the method comprises any one of an injection, extrusion and / or rotational molding phase.

[0014] Its other subject is a method for producing a coating according to the invention, characterized in that the method comprises any one of a screen printing, flexography, spraying and / or pad printing phase.

[0015] Its additional subject is a method for diffusing any of an odorous product and / or a treatment product, characterized in that the diffusion method comprises a step of rubbing the coating according to the invention.

[0016] Thus, a coating of the present invention is a coating comprising a matrix that houses at least one capsule.

[0017] According to the present invention, the capsule contains at least one of an odorous product and / or a treatment product.

[0018] It is understood that the encapsulation or micro-encapsulation of the odorous product and / or the treatment product in a matrix constitutes a simple packaging of the odorous product and / or the treatment product which facilitates its release, and therefore its use by a user very quickly, in a few seconds in particular, very simply, and at the right time.

[0019] According to the invention, encapsulation or microencapsulation is a cutting-edge technology process that isolates and protects substances within capsules or microcapsules, thus providing a method for controlled delivery of these substances in various applications. In the context of innovative coatings, encapsulation plays a crucial role in allowing the incorporation of active products, such as odorants or treatment compounds, into solid or liquid matrices without altering their initial properties or the functionality of the support. The capsules, which can vary in size from a few nanometers to several micrometers, are designed to rupture or dissolve under certain specific conditions - such as pressure, temperature, or in the presence of certain chemical stimuli - thus releasing their contents in a controlled manner.This technology offers significant advantages in terms of protecting encapsulated substances from environmental degradation, extending product lifespan, and targeted and sustained release of active agents. In the case of coatings, this translates into improved functionalities, such as the prolonged diffusion of perfumes, fragrances or the activation of surface treatments in response to specific stimuli, thus helping to create materials with dynamic and reactive properties adapted to specific applications.

[0020] The coating according to the invention comprises a capsule shaped into a sphere with a diameter which is for example less than 50 microns. Such a capsule is easy to produce and delimits a suitable volume, in particular necessary and sufficient, to produce the effect desired by the user. The capsule is preferably made of a material impermeable to oxygen such as a polymer resin. This results in preservation of the treatment product and / or the odorous product against oxidation of any of the latter, which guarantees the durability of such a coating for possible use over a long period.

[0021] According to an alternative embodiment, it is possible to have a specific formulation in the form of slurry and / or powder.

[0022] According to the invention, the capsules capable of releasing an odorous product and / or a treatment product following friction are designed to respond to specific stimuli, in this case thermomechanical, to release their contents. As a non-limiting example of capsules or microcapsules that can be envisaged, the following may be mentioned: o Rigid-walled microcapsules: These are capsules with a hard outer shell, often made of polymers, silica, or ceramic, designed to rupture under a specific mechanical stress. They are ideal for applications where immediate and complete release of the contents is desired following pressure or friction. o Elastic microcapsules: Made from elastomeric materials, these capsules can deform under pressure without immediately rupturing, allowing a controlled and gradual release of the contents. They are particularly suitable for applications requiring prolonged diffusion.o Thin-walled microcapsules: These capsules have a thin, fragile outer shell, facilitating rupture under low mechanical stress. They are used to ensure rapid release of the contents upon application of friction. o Controlled-release capsules: Designed with specific rupture mechanisms, these capsules allow controlled release of the contents in response to defined mechanical stimuli. They can be formulated to respond to different force levels, providing flexibility in release management. o Nanoencapsulation: Using nanotechnology, these very small capsules allow active substances to be encapsulated for targeted release. Although their rupture may require specific forces, they provide a large contact surface, promoting efficient diffusion of the active agents.o Phase-change capsules: These capsules contain materials that change physical state in response to a mechanical stimulus, resulting in the release of the contents. They are useful for applications requiring a change in coating behavior following activation.

[0023] Preferably, each of these capsule types may be designed to encapsulate odorous products and / or treatment products, with modifications to the composition of the shell and contents to meet specific release requirements in response to friction. The choice of capsule type will depend on the intended application, the desired properties of the coating (such as durability, type of release, and intensity of the desired effect), as well as the physicochemical characteristics of the active substances to be encapsulated.

[0024] Said capsule contains at least one odorous product and / or at least one treatment product. The encapsulation of the product makes it possible to provide various coatings comprising either capsules comprising a single odorous product, or capsules comprising a single treatment product, or capsules comprising a mixture of an odorous product and a treatment product, or capsules comprising a mixture of several odorous products, or capsules comprising a mixture of several treatment products, or capsules comprising a mixture of several odorous products and several treatment products, or capsules comprising an odorous product and treatment products, or capsules comprising odorous products and a treatment product.

[0025] Preferably, the odorous product is chosen from a fragrance, an aroma and / or an essential oil, taken alone or in a mixture. We note the significant diversity that such a coating can present.

[0026] Preferably, the treatment product is a product chosen from among products intended to keep away insects, such as lice, mosquitoes, mites taken alone or in a mixture. We also note the significant diversity that such a coating can present.

[0027] Even more preferably, the treatment product is chosen from N,N-Diethyl-meta-toluamide, ethyl butylacetylaminopropanoate, Citriodiol, pigments, essential oils, in particular essential oils of Lavandin, Tea tree, True Lavender, Egyptian Geranium, Atlas Cedar, and coconut vegetable oil, taken alone or in a mixture.

[0028] N,N-Diethyl-meta-toluamide, also known as diethyltoluamide or DEET, is the most common active ingredient in insect repellents. It protects against mosquitoes, flies, ticks, fleas, leeches, some parasitic worms, and many biting insects.

[0029] Like DEET, butylacetylaminopropanoate, also known as Insect Repellent 3535, is a broad-spectrum insect repellent. It is particularly effective against mosquitoes, flies, ticks, fleas, and lice. It is widely used in mosquito repellent sprays, for example.

[0030] Citriodiol is an extremely powerful insect repellent. Its main active ingredient is paramenthane-3,8-diol, also known as PMD or menthoglycol. It can be extracted from the essential oil of lemon eucalyptus leaves or synthesized in a laboratory.

[0031] The use of essential oils is particularly indicated in the prevention of lice infestations.

[0032] Advantageously, the anti-insect effectiveness can be accentuated by original combinations of products.

[0033] Advantageously, the matrix is ​​a polymer with a melting temperature below 220°C, which is compatible with the temperature resistance of the fragrance. Such a melting temperature chosen for the polymer matrix is ​​the best compromise between a wide variety of matrix and ease of shaping the matrix.

[0034] The matrix is ​​preferably chosen from polyethylene, polypropylene, cellulose acetate, acrylonitrile butadiene styrene, ethyl vinyl acetate, polyoxymethylene, polypropylene, polystyrene, polyamide, polyvinyl chloride and polyurethane. The polymer matrix can also be of plant origin, biocompostable, recyclable and of biosourced origin, and can comprise corn starch, algae, castor oil with a mineral or vegetable filler.

[0035] According to an alternative embodiment of the invention, the matrix is ​​an ink. According to such an alternative embodiment, the matrix is ​​capable of covering a large number of supports, paper, plastic or the like such as leather, wood, textiles. According to another alternative embodiment of the invention, the matrix is ​​a varnish capable of covering any support. It is understood that the diffusion of said products is accentuated in a varnish, the varnish being applied superficially to a support, such that the diffusion is improved for superficial capsules compared to capsules present in the mass of a coating.

[0036] It is noted that the varnish is for example applied to glasses, in particular by spraying.

[0037] According to a first advantageous embodiment of the invention, the capsule is shaped into a sphere with a diameter which is for example less than 50 microns, said capsule being made of a material impermeable to oxygen such as a polymer resin and contains at least one odorous product and at least one treatment product.

[0038] According to a second advantageous embodiment of the invention, the coating according to the invention comprises:

[0039] - an odoriferous product which is a fragrance, an aroma and / or an essential oil, taken alone or in a mixture; and / or

[0040] - a treatment product which is a product intended to keep insects (lice, mosquitoes, mites, etc.) away, taken alone or in a mixture.

[0041] According to another advantageous embodiment of the invention, the devices comprising a coating according to the invention find an application for microencapsulation of aromas of wines or spirits on paper or film label supports, in particular in correspondence with the products contained in the bottles for which these labels are intended. Thus, the device comprising a coating according to the invention can be in the form of a paper or film label support, for the microencapsulation of aromas of wines or spirits.

[0042] The devices comprising a coating according to the invention also find an application for micro-encapsulation of fragrances on paper or film label supports, in particular in relation to the products contained in the perfume bottles for which these labels are intended; or for deposition on papers used as samples of the fragrances to be tested. Thus, the device comprising a coating according to the invention can be in the form of a paper or film label support, for the micro-encapsulation of fragrances.

[0043] The devices comprising a coating according to the invention also find an application for micro-encapsulation of fragrances, odors on natural, vegan or synthetic leather supports. Thus, the device comprising a coating according to the invention can be in the form of a natural, vegan or synthetic leather support, for the micro-encapsulation of fragrances.

[0044] The devices comprising a coating according to the invention also find an application for microencapsulation of active ingredients in gel coats, paints, varnishes. Thus, the coating according to the invention can be in the form of a gel coat, a paint, or a varnish, for the microencapsulation of active ingredients.

[0045] The devices comprising a coating according to the invention also find an application for micro-encapsulation of active ingredients and / or fragrances, odors on hair clips or barrettes. Thus, the coating according to the invention can be in the form of a hair clip or barrette, preferably made of polymer, for the micro-encapsulation of active ingredients and / or fragrances, odors.

[0046] Finally, the devices comprising a coating according to the invention can be associated with antimicrobial principles and aromatherapy. Also, the device comprising a coating according to the invention can be in the form of a paper or film label support, a natural, vegan or synthetic leather support, a gel-coat, a paint, or a varnish, for the micro-encapsulation of antimicrobial principles and those derived from aromatherapy.

[0047] The devices comprising a coating according to the invention described in particular above offer a wide range of technical advantages, due to the integration of micro-encapsulated capsules within various matrices and applications. Here is a non-exhaustive list of these advantages: a) Controlled release of active substances: Micro-encapsulation allows a targeted and controlled release of odorous and / or treating products, activated by specific stimuli such as friction, pressure, or temperature changes, ensuring effective and prolonged use of the active substances. b) Protection of active substances: The capsules, being advantageously impermeable to oxygen and other potentially degrading factors, protect their contents against volatilization, oxidation, and degradation, thus extending the life and effectiveness of the odorous and treating products.c) Versatility of application: The ability to apply these coatings to a variety of substrates, including paper, film, leather (natural, vegan, or synthetic), as well as in the form of gel-coat, paint, or varnish, significantly expands the areas of use, from product packaging to the coating of luxury items. d) Enhanced user experience: The inclusion of fragrances, aromas, or essential oils enriches the sensory experience of consumers, giving significant added value to products. This can positively influence brand perception and customer satisfaction. e) Specific functionalities: The treatment products offer additional functionalities such as insect repellence or antimicrobial and aromatherapy properties, improving not only aesthetics but also the well-being and health of users.f) Durability of coatings: The use of polymers with melting temperatures advantageously lower than 220°C for the matrix allows the creation of heat-resistant coatings, suitable for various usage conditions and environments, while maintaining the integrity and functionality of the encapsulated capsules. g) Environmental and health applications: Microencapsulation of active ingredients offers potential applications in air purification, odor control, and the diffusion of health-promoting agents, thus contributing to healthier and more pleasant indoor environments. h) Innovation and market differentiation: The integration of microencapsulation in coatings opens new perspectives for innovation in product design and formulation, allowing brands to differentiate themselves in competitive markets.

[0048] The present invention also relates to a device which is an eyeglass element comprising such a coating. In other words, the coating at least partially covers said eyeglass element or is the material mainly constituting said eyeglass element. The eyeglass element is indifferently a temple of eyeglasses, a nose of eyeglasses, or any portion thereof. According to such an alternative embodiment, the coating of the present invention is easily and quickly within reach of the user who wears eyeglasses comprising at least one such eyeglass element. This results in constant, rapid availability, without any particular effort for the user.

[0049] The present invention also relates to a pair of glasses comprising at least one such eyeglass element.

[0050] The present invention also relates to a method for producing such a coating, the method comprising any one of an injection, extrusion and / or rotational molding phase.

[0051] The present invention also relates to a method for producing such a coating, the method comprising any one of a screen printing, flexography, spraying, immersion in a bath and / or pad printing phase.

[0052] The present invention also relates to a method for diffusing any of an odorous product and / or a treatment product, the diffusion method comprising a step of rubbing such a coating, in particular by means of a finger or another part of the user's body. The diffusion method described is based on a friction activation mechanism, specifically designed for coatings containing capsules encapsulating or microencapsulating at least one odorous product and / or a treatment product. Initially, the coating, applied to a suitable surface, preferably remains inactive, the capsules encapsulating the active substances being stably integrated within the matrix of the coating. When an external mechanical force, such as manual rubbing or the use of a tool, is applied to the surface of the coating, this results in local deformation of the matrix and targeted rupture of the capsules.This rupture releases the active products contained in the capsules - either an odorant, a treatment product, or a combination of both. The released product then diffuses through the coating matrix and interacts with the external environment, thus achieving the desired effect, such as the diffusion of a perfume, a fragrance or the application of a treatment to the affected surface. This process allows for a controlled release of the active agents, activated by the user as needed, thus offering a versatile and effective method for managing the diffusion of substances from functionalized coatings.

[0053] It is noted that such diffusion does not destroy or alter any of the odorous product and / or the treatment product, but that a release of said products is obtained by porosity of the capsules without having to break the latter.

[0054] The invention and the advantages resulting therefrom will be better understood upon reading the description and the non-limiting embodiments which follow, with regard to the appended figures in which:

[0055] [Fig. 1] shows a sectional view of a coating of the present invention.

[0056] [Fig. 2] represents a side view of an eyeglass arm comprising a coating illustrated in Fig. 1.

[0057] [Fig. 3] represents in perspective a pair of glasses comprising a spectacle arm illustrated in figure 2.

[0058] [Fig. 4] schematically represents a diffusion process of a product constituting a coating illustrated in Figure 1.

[0059] In Figure 1, a section of a coating 1 of the present invention is shown. The coating 1 comprises a matrix 2 which houses capsules 3. In other words, the capsules 3 are distributed inside the matrix 2 in a random manner, some of these capsules 3 being flush with a surface 4 of the matrix 2. This surface 4 is preferably a free surface accessible to a user. The capsules 3 are for example shaped into a sphere with a diameter D which is between 5 microns and 50 microns, and for example of the order of 10 microns, to within + / - 10%.

[0060] Each capsule 3 contains at least one of an odorous product 5a and / or a treatment product 5b. According to various variants, the capsules 3 comprise a single odorous product 5a, or the capsules 3 comprise a single treatment product 5b, or the capsules 3 comprise a mixture of an odorous product 5a and a treatment product 5b, or the capsules 3 comprise a mixture of several odorous products 5a, or the capsules 3 comprise a mixture of several treatment products 5b, or the capsules 3 comprise a mixture of several odorous products 5a and several treatment products 5b, or the capsules 3 comprise an odorous product 5a and treatment products 5b, or the capsules 3 comprise odorous products 5a and a treatment product 5b, or even any combination of the variants cited above. In other words, matrix 2 is capable of containing any combination of the capsules 3 listed above.

[0061] Each capsule 3 is made of a material impermeable to oxygen, to protect the odorous product 5a and / or the treatment product 5b from oxidation which would impair the qualities of one or other of the products 5a, 5b.

[0062] The odorous product 5a is, for example, a fragrance, an aroma, an essential oil or the like, taken alone or in a mixture.

[0063] Treatment product 5b is, for example, a product intended to repel insects, in particular lice, mosquitoes, and / or mites, taken alone or in a mixture.

[0064] For example, the treatment product is chosen from N,N-Diethyl-meta-toluamide, Citriodiol, ethyl butylacetylaminopropanoate, pigments, essential oils, in particular essential oils of Lavandin, Tea tree, True lavender, Egyptian geranium, Atlas cedar, and coconut vegetable oil, taken alone or in a mixture.

[0065] Preferably, the matrix 2 is a polymer whose melting temperature is lower than 220°C, to facilitate its implementation using manufacturing processes explained below.

[0066] For example, matrix 2 is chosen from polyethylene, polypropylene, cellulose acetate, acrylonitrile butadiene styrene, ethyl vinyl acetate, polyoxymethylene, polypropylene, polystyrene, polyamide, polyvinyl chloride and polyurethane. The polymer matrix can also be of plant origin, bio-compostable, recyclable and bio-sourced origin, such as corn starch, algae, castor oil.

[0067] According to a preferred embodiment, the matrix 2 is an ink. It is thus capable of being applied to any support, such as paper, glass, a plastic material, a metallic material, a natural material, such as wood, or another similar material such as leather or textiles. In this case, the coating 1 is for example deposited on the paper or another support as listed above by a production method comprising either a screen printing phase, or a flexography phase, or a spraying phase and / or a pad printing phase.

[0068] According to another embodiment illustrated in Figure 2, the coating 1 at least partially covers a spectacle arm 10. The spectacle arm 10 extending between a hinge 11 and a sleeve 12, the coating 1 covers a covering zone 13 which is comprised between the hinge 11 and the sleeve 12, and which is capable of covering the sleeve 12, on all of its faces. Preferably, such a covering zone 13 equips an external face 14 of the spectacle arm 10. It is understood that the external face 14 of the spectacle arm 10 is the face opposite an internal face 15 of the spectacle arm which is placed opposite the user's head when the user wears his glasses.

[0069] According to yet another embodiment, the spectacle arm 10 is obtained by a production method comprising an injection phase, an extrusion phase, a rotational molding phase or the like. In this case, the matrix 2 of the coating 1 is the material mainly constituting the spectacle arm 10 itself.

[0070] In Figure 3, a pair of glasses 20 is illustrated comprising at least one such glasses branch 10 and preferably two such glasses branches 10. The pair of glasses 20 comprises a frame 21 carrying two lenses 22, for example connected by a bridge 23, a nose 24 being interposed between the two lenses 22 to serve as a support for the pair of glasses 20 on the user.

[0071] It is noted that the coating 1 is capable of equipping any element of glasses 10' constituting the pair of glasses 20, such as the glasses branch 10, the bridge 23, the nose 24 or any other portion of the pair of glasses 20.

[0072] In Figure 4, a method of diffusing the odorous product 5a and / or the treatment product 5b is illustrated which comprises a step of rubbing a finger 30 of the user against the surface 4 of the coating 1, in particular from a movement 31 parallel to the surface 4 which exerts a pressure 32 on the surface 4 of the matrix 2. Such a pressure 32 causes heating and / or expansion of the capsules 3, which releases the odorous product 5a and / or the treatment product 5b and allows its rapid and instantaneous diffusion into the environment.

[0073] These arrangements are such that it is easy to diffuse the odorous product 5a and / or the treating product 5b into the atmosphere by simply rubbing the user on a branch of glasses 10, or another element of glasses 10', which is easily accessible for a finger 30 or another part of the user's body. Such diffusion may, for example, be related to the user's vision, for example when attending a show, such as a cinema or the like. These arrangements are also such that it is easy to exert pressure 32 on a postcard or pages of a magazine comprising such a coating 1 to release a fragrance related to an illustration carried by the postcard.It is noted that this pressure 32 can be exerted by the simple fact of wearing the pair of glasses 20 in the case where the coating 1 covers the sleeves 12 of the pair of glasses 20 which naturally rest on the user's ears.

[0074] It should be noted that the diffusion can be naturally light, under the effect of heat in particular, then accentuated by the pressure 32 exerted voluntarily by the user.

[0075] In both cases, we obtain an olfactory function of the pair of glasses 20 or of the postcard or of another support which is totally controlled by the user.

Claims

CLAIMS 1. Coating (1) comprising a matrix (2) housing at least one capsule (3), characterized in that the capsule (3) contains at least one of an odorous product (5a) and / or a treatment product (5b).

2. Coating (1) according to claim 1, characterized in that the capsule (3) is shaped into a sphere with a diameter (D) which is less than 50 microns, said capsule preferably being made of a material impermeable to oxygen such as a polymer resin and preferably containing at least one odorous product (5a) and at least one treatment product (5b).

3. Coating (1) according to one of claims 1 or 2, characterized in that it comprises: an odorous product (5a) which is a fragrance, an aroma and / or an essential oil, taken alone or in a mixture; and / or a treatment product (5b) which is a product intended to keep insects away, taken alone or in a mixture.

4. Coating (1) according to any one of the preceding claims, characterized in that the matrix (2) is a polymer whose melting temperature is less than 220°C.

5. Coating (1) according to any one of claims 1 to 4, characterized in that the matrix (2) is an ink or a varnish.

6. Device comprising a coating according to one of the preceding claims, characterized in that it is in the form of a paper or film label support, for the micro-encapsulation of aromas of wines or spirits.

7. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a paper or film label support, for the micro-encapsulation of fragrances.

8. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a natural, vegan or synthetic leather support, for the micro-encapsulation of fragrances.

9. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a gel-coat, a paint, or a varnish, for the micro-encapsulation of active ingredients.

10. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a paper or film label support, a natural, vegan or synthetic leather support, a gel-coat, a paint, or a varnish, for the micro-encapsulation of antimicrobial principles and those derived from aromatherapy. 1 1. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a hair clip or a barrette, preferably made of polymer, for the micro-encapsulation of active ingredients and / or fragrances, odors.

12. Device comprising a coating according to one of claims 1 to 5, characterized in that it is in the form of a bezel element (10').

13. Pair of glasses (20) comprising at least one device (10') according to claim 12.

14. Method for producing a coating (1) according to any one of claims 1 to 4, characterized in that the method comprises any one of an injection, extrusion and / or rotational molding phase.

15. Method for producing a coating (1) according to any one of claims 1 to 5, characterized in that the method comprises any one of a screen printing, flexography, spraying, immersion in a bath and / or pad printing phase.

16. Method for diffusing any of an odorous product (5a) and / or a treatment product (5b), characterized in that the diffusion method comprises a step of rubbing the coating (1) according to any one of claims 1 to 5.

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