FR2929810A1 - Cosmetic treatment method for creating face-lift effect on skin of e.g. face of woman, involves modifying excitation of actuator, so that actuator induces displacement of keratinous material - Google Patents

Abstract

The method involves putting into place on a keratinous material of electroactive polymer material actuator (700), and exciting the actuator, so as to induce deformation. The actuator is put into a place by using fastening on the keratinous material, and the excitation of the actuator is modified, so that the actuator induces a displacement of the keratinous material, where the actuator is elastically deformable, and induces displacement of the keratinous material on returning to initial configuration. The excitation is accompanied by disconnection of electrical conductors feeding the actuator. Independent claims are also included for the following: (1) an epilation method for creating a face-lift effect on a skin of a face or of a body (2) a textile article for wearing by an individual (3) a method for applying a composition (4) a massage device comprising an electroactive material actuator (5) a method for fabricating the actuator (6) a device for applying to keratinous material (7) a method for raising a bust (8) a method for modifying an outline of an eye.

Description

The present invention particularly relates to methods and devices for modifying the appearance of a person and those relating to the application of a composition on keratin materials. It is known to apply to the skin compositions having a tensor effect in order to reduce the visibility of wrinkles. The effect of these compositions may not be as durable as desirable. In addition, their effect is limited because tensor materials, beyond a certain contraction, are cracking. The voltage is therefore limited to small areas, typically a few millimeters.

Moreover, the tensors can only apply contractile forces. They can not give extension effects. Finally, their effect is neither adjustable nor adjustable. Therefore, if the new form is not the desired one, we do not know how to increase or diminish their effect. Cosmetic surgery can permanently transform the face or body. However, there are many situations where a temporary change in the appearance of a person would be sufficient, for example when participating in a show. US Pat. No. 6,937,893 discloses a patch comprising an electrostrictive polymer for acting electromechanically on the skin. An application to the treatment of wrinkles by exciting the polymer with a cyclic tension is disclosed.

Publication WO 99/56829 discloses bandages provided with ultrasonic transducers to accelerate healing of wounds. There is a need for new ways to change the appearance of a person. The invention aims, in some aspects, to provide solutions for temporarily changing the appearance of a person and in other aspects to propose new modes of action on keratin materials, for example for the application of a composition, in particular a cosmetic composition. The invention is based in general on the use of at least one actuator, in particular an electroactive polymer activator.

Electroactive polymer actuators are disclosed in various publications, including US 2007/0114116 A1, US 6,109,852, US 5,389,222, US 5,250,167, US 6,475,639 and WO 01/80284, for example to provide controllable catheters. or artificial muscles for prostheses or robots. According to a first aspect, the subject of the invention is a cosmetic treatment method, comprising the following steps: a) setting up at least one actuator with an electroactive material, preferably an electroactive polymer, on keratin materials, b) exciting the actuator so as to induce a continuous movement of the keratin materials at least as long as the actuator is in place. By "continuous displacement" it is necessary to understand a displacement which is not cyclic, even if this displacement may be of non-constant amplitude in time. The displacement of the keratin materials can lead to a modification of the aspect of the observable person while the actuator is in place. The displacement can result from the application of a non-cyclic voltage to the actuator, of constant polarity.

Throughout the description, "cosmetic treatment" must be understood in a broad manner and includes including the modification of the appearance of keratin materials. The introduction of the actuator on keratin materials may include fixing the actuator by gluing or by other means such as suction cups for example.

The keratin materials may be chosen from the skin, the mucous membranes or the keratinous fibers, in particular the hair or the eyelashes. The excitation may be of electrical origin or other, for example light, biological, chemical or thermal. The actuator may for example comprise one or more compounds capable of transforming an external stimulus, for example a light radiation, a heat input or a mechanical stress into a potential difference leading to excitation of the actuator. For this, we can use one or more photovoltaic cells, providing, under irradiation, a voltage. In an exemplary implementation of the method, after excitation of the actuator, the keratin materials are maintained substantially in the configuration in which the actuator has brought them, by gluing the keratin materials with a holding film or application of a film-forming composition which by filming immobilizes the keratin materials. For example, using an adhesive strip, Scotch brand for example, an adhesive bandage, a lacquer, typically a hairspray, containing a resin-type polymer, a solvent and a propellant, a liquid dressing, an adhesive solution, cyanoacrylate for example.

After the application of this holding film or of this film-forming composition, the actuator may possibly be removed, if this is still possible. The actuator can also be left in place. However, the electrical conductors of the actuator can be removed. Before being placed on the keratin materials, the actuator can be cut to a format depending on the keratin materials to be treated. The excitation of the actuator can be carried out in a gradual manner so as to induce a progressive force and / or a corresponding displacement, for example to enable the user to visually determine the degree of excitation of the actuator. suitable actuator to achieve the desired result or to allow fine adjustment of the degree of expansion or contraction of the actuator. The invention thus also relates, independently or in combination with the foregoing, to a method of cosmetic treatment of a person, comprising the following step: a) exciting at least one material actuator, preferably a polymer, electroactive in a gradual manner, so as to induce a force and / or a progressive corresponding displacement on the keratin materials. The excitation of the actuator can be performed in response to the action of the user on control means, for example the movement of a button or cursor or the input of data on a keyboard or a touch screen. These control means can control an amplitude of the excitation voltage and / or an excitation polarity and / or an excitation frequency, among others. The electrical excitation of the actuator can be at least partially automated, and be performed in response for example to the prior acquisition of at least one typological characteristic of the person, for example an image of his face or his face. body, or in response to at least one signal from a sensor, in particular a sensor carried by the person, for example a sensor for pressure, displacement, moisture, sensitive to light or other.

The method can thus, in an exemplary implementation, include the steps of acquiring at least one image of the body or the face of the person, automatically determining a correction to be made by means of the actuator (s) or allowing the user to enter the desired correction, and to automatically control the actuator or actuators so as to induce on the keratin materials a force and / or displacement to cause a change in the appearance of keratin materials corresponding to the correction sought . The method can be implemented to embellish the person, change his appearance, rectify asymmetries or age, for example for theatrical needs.

The method can also be implemented so that the force and / or displacement exerted by the actuator on the keratin materials tends to exert a persistent action after removal of the actuator. For example, the actuator can be used to locally tighten the skin, on either side of a wrinkle, to reduce the depth thereof and / or allow a tissue reconstruction in a particular configuration. The mechanical stress can be exerted for example on the skin during the night in order to make the wrinkle less apparent during the day. The actuator that is used in this case is for example an actuator that expands when powered electrically. The object of the invention is thus, independently or in combination with the foregoing, a cosmetic treatment process in which at least one material, preferably polymeric, electroactive actuator is applied to the keratin materials, in particular the skin, during a duration greater than 10 minutes, better 60 minutes, even better 3 hours, or even 6 hours or 12 hours, the actuator being applied for example during the night and removed for the day. Subjecting the keratin materials to a prolonged mechanical action can promote tissue reorganization, for example the reformation of collagen.

The invention further relates to a device for implementing such a method, comprising an actuator arranged to be worn during use for the duration above, and the corresponding power supply. The force and / or displacement that is exerted on the keratin materials may also be aimed at performing a massage action, particularly when this force and / or displacement is modulated in time. The massage may for example aim to confer a feeling of well-being, to strengthen, to stimulate nerve endings and / or to promote the action of a cosmetic or dermatological composition.

In exemplary embodiments of the invention relating to particular aspects thereof, the electrical excitation of the actuator is effected by repeated cycles in order to exert a non-constant force and / or reciprocating motion on the actuator. the skin. An advantage associated with the use of an electroactive polymer actuator is that it can benefit from the small thickness of the actuator, which can optionally be used to perform the treatment under clothing or under a masking film having the appearance of the materials. underlying keratin. The actuator may, in an exemplary implementation of the invention, serve to move one of the eyelids, for example the lower eyelid. An actuator that contracts during the application of a voltage is for example fixed at one end on the eyelid and at another end on the cheek. In another embodiment of the invention, several actuators are used simultaneously, and each of these actuators is excited to an individually controllable level. The degree of excitation of the different actuators depends for example on an aspect that is sought to reproduce, this aspect having for example been selected by the user among several. The method may comprise the automatic calculation of the electrical voltage to be applied to each actuator in order to deform the keratin materials to obtain the desired appearance. In another example of implementation of the invention, at least one actuator is used to act on the lower eyelid and at least one other actuator to act on the upper eyelid. Actuators are for example fixed on the eyelids at one end, just below and above the eyelashes, respectively. In one embodiment of the method, several actuators are fixed at one end on the lower eyelid and at the other end on the cheek and these actuators are contracted so as to obtain the desired deformation for the eyelid. In another example of implementation of the invention, an actuator is used which can contract when powered electrically, which is fixed at one end to the ear and at the other end to the skull, and the the actuator is electrically energized to bring the ear closer to the skull, for example to restore symmetry of the ears in case of detachment of one of them. The contraction of the actuator can be progressive, and one can maintain the ear in the desired configuration through an adhesive for example.

In an exemplary implementation of the invention, the actuator (s) are used to modify the appearance of the body or face before cosmetic surgery, in order to allow the person who will undergo the procedure and / or the surgeon to have an indication of the result of the operation.

In general, the actuator (s) used may be masked by a masking film and / or makeup, so as to be as little visible as possible, especially once the desired movement has been obtained. The object of the invention is therefore, according to another of its aspects, a process for making up keratin materials in which a make-up composition is applied not only to the keratin materials but also to an actuator comprising a material, preferably a polymer, electroactive or a holding film covering this actuator. The actuator (s) can also be initially painted with the color of the underlying keratin materials or have a rough or porous surface state allowing the application and maintenance of a makeup composition such as a foundation. for example. According to another of its aspects, the subject of the invention is also a process for applying a composition, in particular a cosmetic composition, to keratin materials, comprising the step of: exciting a material-based, preferably polymeric, actuator , electroactive to exert a force and / or move the keratin materials in the application zone of the composition. Such a method can: promote the penetration of the composition, for example by effecting a massage action of the keratin materials in the zone of application of the composition, and / or facilitate the renewal of the composition, at the interface with the keratin materials, and / or - exerting a pressure tending to force the penetration of the composition into the keratin materials, and / or - making the contour of the zone of application less clear, which may be useful in the case of application of a foundation or self-tanner, for example.

In some applications, the movement of the actuator may be reciprocating, the frequency of extensions / contractions of the actuator being for example between 1 per minute and 500 per second. The composition may be applied to the keratin materials before the actuator is brought into contact with them. Alternatively, the composition is deposited on the actuator and the latter is applied to the keratin materials. The actuator may also include at least one opening or channel for bringing the composition to the keratin materials, while the actuator is in place. The actuator may, if necessary, be pre-impregnated with the composition to be applied and packaged in a receptacle for the preservation of the composition, for example a sealed receptacle. When the actuator is excited, the latter may or may not be fixed to the keratin materials. For a massage action or scrubbing and / or application of a composition, a contact of the actuator with the keratin materials without attachment to the latter may suffice. The actuator is then for example held by hand by the user or maintained by suitable means against keratin materials. The actuator can be integrated in a garment or undergarment, the device for providing the electrical stimulation voltage of the actuator being for example also integrated into the garment. One or more actuator (s) can be integrated into a patch or mask to be placed on the face, a belt to arrange around the waist or thighs or pants or pants. When the actuator is intended to exert a massage or scrubbing action and / or to apply to the application of a composition, the skin contact surface, set in motion by the actuator, may be flocked or defined by a foam, a woven or non-woven, optionally impregnated (e) by the composition. The contact surface may be slightly abrasive if necessary, in order to achieve a dermabrasion. According to another of its aspects, the subject of the invention is also a kit comprising: at least one material actuator, preferably polymer, electroactive, at least one composition to be applied to the keratin materials, in particular a cosmetic composition or dermatology. Another subject of the invention, according to another of its aspects, is a kit comprising: at least one material actuator, preferably a polymer, electroactive, at least one holding film or a film-forming composition to be applied to the keratin materials to keep them in a configuration where the actuator has brought them. The holding film is for example adhesive, comprising for example one or more adhesive zone (s) covered (s) by a removable protective film. The adhesive is preferably hypoallergenic. The film may still not be adhesive and the kit may include an adhesive in a separate package for adhering the retaining film to the keratin materials. The holding film may optionally have the same appearance as the underlying keratin materials and / or be makeup.

In all these kits, the actuator may be at least partially transparent or have a face having substantially the color of the underlying keratin materials or being makeup. Each of the above kits can be contained in the same packaging, such as for example a box, a box or a blister. The kit may contain one or more reusable or single-use actuators. This or these actuators can be arranged in a sterile individual package, if necessary. Actuators can be conditioned already connected to electrical supply conductors. The invention further relates, in another of its aspects, to a massage device comprising at least one actuator material, preferably polymer, electroactive, and an apparatus for electrically powering the actuator so as to induce displacements periodic actuator. The latter may be an actuator contracting or expanding in response to the application of an electrical voltage always having the same polarity but a variable amplitude, or an actuator able to contract and expand, depending on the polarity of the voltage applied. The massage device may, where appropriate, be integrated with a garment or undergarment, as indicated above, or with a patch or mask. The massage device can be used while the actuator (s) are arranged under at least one garment.

The massage device can be used before or after the application of a cosmetic composition, for example a massage oil, a moisturizing cream, a slimming or exfoliating product, a self-tanner, ....

The actuator may be arranged, if necessary, to heat when electrically powered, either because of a heat dissipation in the electroactive polymer or in one or more ohmic heating elements arranged in parallel or in series with the electroactive polymer or connected to a separate power supply.

The massage device may also include at least one Peltier effect component for cooling the keratin materials when electrically powered. The massage device may comprise at least one electrode that comes into contact with the skin in order to allow electrostimulation of the keratin materials in addition to mechanical stimulation.

The invention further relates, in another of its aspects, to a method of manufacturing an actuator, in which the actuator is formed by successively depositing electrodes and an electroactive polymer on the keratin materials, with the possible interposition of a barrier film between these elements and the keratin materials. The invention also relates to a method of manufacturing an actuator, wherein the electroactive polymer is molded or shaped hot, so as to take the form of keratin materials on which the actuator will be put in place. This can make it possible to have an actuator that best matches the shape of the region of the body or face that will be affected by the excitation of the actuator. The realization of the electrodes of the actuator can be done on the electroactive polymer thus molded or shaped hot, or alternatively the electrodes may already be present on the electroactive polymer when it gives the latter the desired shape. The subject of the invention is also a device to be applied to keratin materials comprising a material actuator, preferably a polymer, electroactive and a source of electrical energy, integrated in the device, for example a battery, which may have been produced by a printing technique. The battery can be carried by the same support as the actuator, for example a flexible film. Stacks made by printing are known from the Powerpaper company in particular. The device may be in the form of a sheet, for example a patch or a mask, with, where appropriate, a control circuit which governs the supply of the electroactive polymer. The control circuit comprises for example a system for triggering the operation of the patch once it is applied to the keratin materials.

The invention further relates, in another of its aspects, to a sheet device to be applied to keratin materials, this device incorporating at least one material actuator, preferably a polymer, electroactive and having at least one optical layer providing a optical effect, arranged to accompany a mechanical deformation of the actuator, and whose appearance changes as a function of this deformation. The optical layer comprises, for example, an interferential structure whose color changes as a function of the degree of expansion or contraction of the actuator, for example because of a change in the distance between diffracting patterns within a diffraction grating . The optical layer can define the outer face of the device.

After application to the keratin materials, the deformation of the actuator is for example adjusted so that the appearance of the optical layer corresponds to that of neighboring keratin materials, which can effectively hide a defect. The subject of the invention is also a device comprising: a material actuator, preferably a polymer, electroactive, a sensor, a control circuit of the actuator as a function of at least one signal delivered by the sensor, actuator being arranged to attach to the keratin materials. The sensor may be arranged to attach to the keratin materials, and may be arranged for example to detect relaxation of the skin, the device comprising a circuit arranged to excite the actuator in response to the detection of this release in order to retighten the skin. The actuator can be placed on areas that may give rise to wrinkles, for example around the eyes, to delay the appearance of wrinkles. According to another of its aspects, the subject of the invention is also a cosmetic treatment method comprising the step of: a) exciting at least one electroactive material actuator so as to induce a deformation thereof, b ) set up the actuator, in particular by fixing it on the keratin materials, and c) modify the excitation of the actuator, so that the actuator induces a displacement of the keratin materials. The actuator may be elastically deformable and induce a displacement of the keratin materials by returning to its initial configuration.

The modification of the excitation in step c) above may correspond to the termination of the excitation. Stopping the electrical excitation of the actuator may be accompanied by a disconnection of the electrical supply conductors of the actuator. The actuator can be used by being fixed on the body, so as to modify the appearance of the chest. The actuator can alternatively be fixed on the face so as to lift the skin around the face. The actuator can still be fixed on the face so as to act on the lower or upper eyelid, especially to enlarge the eye.

The actuator may or may not come into contact with the skin. The actuator can be glued to the skin or attached to clothing or underwear. The actuator is for example glued to the skin on end regions only. The actuator can be glued to the skin with a pressure-sensitive adhesive. The actuator can be used to mechanically apply the skin to muscle. According to another of its aspects, the subject of the invention is also a method for creating a lifting effect on the skin of the face or of the body, in which an actuator is actuated to an electroactive material by applying a tension to it. electrical and then the actuator is fixed on the skin and modifies, including the interruption, the electrical excitation, so as to allow the actuator to retract. The actuator can then be hidden by makeup. Such a method may include the step of evaluating the person to treat the degree of contraction of the actuator necessary to achieve the desired result and adjusting the voltage so as to obtain the desired extension or contraction of the actuator after interruption of the electrical excitation. The actuator can be fixed to the skin by being stuck on it, before interrupting the electrical excitation, the fixing being able to be performed at two opposite ends of the actuator. This method can be useful in particular to lift the turn of the face. The length of skin to be raised can be estimated for example by applying a finger on a corner of the maxilla and raising the finger towards the temples. One can choose, for example, to raise by means of the actuator the skin over a distance of between 1/3 and 2/3, for example half, of the total distance on which the finger could move the skin. The advantage of using an actuator is that the distance the actuator pulls the skin can be relatively precisely controlled.

Another subject of the invention, according to another of its aspects, is a method for raising the breast, in particular at least one breast, in which an actuator is used, to which an electrical voltage is applied to cause its extension, which is fixed. at its ends on areas of the body, and then modifies, including interrupts, the power supply of the actuator, so as to cause its contraction and the desired recovery of the chest. The actuator can be fixed at its ends on firm areas of the body by allowing the breast to rest, for example freely, on an intermediate zone of the actuator. The actuator can still be attached at its ends to soft areas of the body. The actuator may have enlarged and / or thicker end regions, which may facilitate its attachment. Another object of the invention is, according to another of its aspects, a method for modifying the shape of the contour of the eye, in which an electric voltage is applied to an actuator in order to cause it to be elongated, the actuator is fixed on zones of the eye region, and the power supply of the actuator is modified, in particular the power supply is interrupted, so as to cause its retraction and a modification of the appearance of the region of the eye. . The actuator used in this application has for example before electrical excitation a length less than or equal to 30 mm and a width less than or equal to 30 mm, for example about 20 mm in length and about 20 mm in width. The actuator may have a central layer which is less than 50 m thick for example, layers of electrodes and outer layers which are, for example, each less than 15 m thick. The actuator can be used to lift a flanged eyelid. Another subject of the invention is, according to another of its aspects, the use of an actuator for mechanically biasing a region of the body of an individual, in which the actuator performs contraction and extension cycles while simultaneously being disposed on the skin, so that it accompanies at least partially the movement of the actuator. We can treat the cheeks or the region under the eyes.

The invention further relates, in another of its aspects, to a cosmetic treatment process in which an electroactive, preferably polymer, material actuator is excited cyclically to act on a region of the body or face and in which at least one of the amplitude and frequency is determined based on information from the subject on which the actuator is placed. The method may include a step of determining the amplitude and frequency of the mechanical stresses that do not create discomfort for the user. In a prior phase, it is possible for example to vary the frequency, for example between 0.001Hz and 5000Hz, as well as the applied voltage, for example from 0 to 10 000 V. The frequency and the voltage can be modified according to information transmitted by the user subjected to the mechanical stresses of the actuator, so as to determine the values that are most comfortable. The values preferred by the user can be, for example, stored in a device that controls the excitation of the actuator. Several frequency and / or voltage values can be successively applied, in order to allow the user to make a selection. Another object of the invention is, according to another of its aspects, the use of a material actuator, in particular a polymer, an electroactive actuator for the prevention of stretch marks. The actuator is thus used on an area susceptible to stretch marks.

In particular, the actuator can be used for women, in periods when the body can grow, being advantageously used in combination with weight monitoring. The application can be performed on body parts such as thighs, buttocks, breasts and belly. The actuator can be applied to the region to be treated and the power supply of the actuator can be changed so that the actuator undergoes cycles of contraction and extension. For example, the electrical voltage can be applied for a period of at least one minute and then interrupted for a period of at least one minute. The invention can also be used to treat a sore skin, especially by the sun, by using the actuator cycles of extension and / or compression during the period following the appearance of the erythema until the disappearance of it.

If necessary, the treatment of the skin by extension and compression cycles can be performed after exposure to the sun but before the appearance of erythema. The actuator can be used with or without added product.

The actuator may comprise at least one hole allowing the application and diffusion of a composition, for example a fatty fluid, this diffusion taking place for example towards the skin. The actuator may comprise an adhesive for adhering to the skin which contains at least one product having an action on the skin, for example an analgesic product.

The actuator can be integrated into a garment or an undergarment. Another subject of the invention, according to another of its aspects, is an epilation process in which, in contact with the skin, an actuator with an electroactive material, in particular an electroactive polymer, is present, this exciter being integral with a part, in particular textile, capable of exerting a depilatory effect on the skin under the effect of movements of this piece induced by deformations of the actuator, in particular cyclic deformations. The invention further relates, in another of its aspects, to a cosmetic treatment process in which an actuator with electroactive material is excited cyclically to act on a region of the body or face and in which at least one Amplitude and frequency are determined based on information from the subject on which the actuator is placed. The invention further relates, in another of its aspects, to a cosmetic treatment process in which an electroactive material actuator is used to mechanically urge the skin following exposure to the sun that may lead to erythema. Another subject of the invention, according to another of its aspects, is a textile article intended to be worn by an individual, in particular a fabric, comprising a plurality of actuators in the form of threads, in particular integrated threads in the form of strips. to the textile piece, in particular to the weft of the fabric, possibly with an electric excitation generator actuators carried by the textile article.

According to another of its aspects, the subject of the invention is also a process for the cosmetic treatment of a subject in which a textile article as defined above is provided to the subject, and the actuators are excited so as to: - Move the skin or exert pressure on it, cyclically or not, with for example an excitation of the actuators before the introduction of the textile article, so as to cause expansion of the textile article, with possibly a stop of the excitation once the textile article in place, so as to ensure a certain restraint of the region in contact with the textile article, and possibly a new excitation of the actuators before the removal of the textile article , so as to facilitate this removal, with the eventual cyclic excitation of the actuators once the textile article in place. The invention will be better understood on reading the following detailed description, nonlimiting exemplary embodiments thereof, and on examining the appended drawing, in which: FIG. FIG. 2 is a top view of an example of an actuator; FIG. 4 is a view similar to FIG. FIG. 3 of an embodiment variant of an actuator; FIGS. 5 and 6 show in perspective, in a schematic and partial manner, other examples of actuators; FIG. 7 illustrates the use of actuators for acting on the lower eyelids, - Figure 8 illustrates the immobilization of the eyelids by applying a film, following the movements exerted by the actuators of Figure 7, - Figure 9 illustrates an alternative embodiment of the method, using several actuators for each eyelid, - figure 10 illus the use of actuators arranged on the cheeks, - Figure 11 illustrates the use of actuators on an arm, - Figure 12 is a view similar to Figure 11, illustrating the introduction of a film 30 FIG. 13 illustrates the implementation of the method for moving an ear, - FIG. 14 illustrates the use of actuators for acting on both the lower and upper eyelids, FIGS. 23 are block diagrams illustrating various steps of exemplary methods according to the invention; - FIG. 24 represents, in plan view, another example of an actuator; FIG. 25 is a schematic transverse section of the actuator; of FIG. 24, - FIGS. 26 to 28 illustrate different ways of positioning the actuators to act on the chest, - FIG. 29 illustrates the use of an actuator to act on the face, - FIGS. 30 and 31 illustrate the actuator user To act on the region around the eye, - Figure 32 is an example of underwear incorporating actuators, - Figure 33 illustrates the attachment of an article having an actuator on the body, - Figure 34 illustrates a Another example of positioning the actuators - Figures 35 to 37 schematically show examples of textile structures incorporating actuators, and - Figure 38 is a schematic section of an exemplary actuator structure. Actuators The invention is based on the use of actuators with electroactive materials, preferably electroactive polymers, also called EAP actuators according to the English terminology. By actuator electroactive material means an actuator that is capable of contracting or expanding in at least one direction, thanks to the presence in the actuator of at least one electroactive material capable of transforming an electrical energy into mechanical energy. One distinguishes among the actuators with electroactive materials on the one hand those said ionic, such as those based for example on the use of polyelectrolyte gels, ionic composites, conjugated polymers or carbon nanotubes, and on the other hand those said electronic, based for example on the use of piezoelectric polymers, electrostrictive polymers, dielectric elastomers or liquid crystal elastomers and conductive polymers.

The electroactive material is preferably not only sensitive to electrical voltage or current, but also has a flexibility, for example having the mechanical behavior of an elastomer. A polyelectrolyte gel comprises, for example, a polymer gel formed of an elastomeric matrix filled with a liquid. Ionic composites are for example formed of an ionic polymer-metal combination, being also called IPMC according to the Anglo-Saxon terminology, and comprise for example a polymeric membrane comprising an ionic liquid, covered by metal electrodes, so that the Application of an electric field induces electrophoretic migration of ions leading to bending of the membrane. The actuator may comprise at least one conductive polymer, also called CP according to the English terminology. A conductive polymer actuator comprises, for example, an electrochemical cell whose electrodes are conductive polymers, so that the application of a voltage across the electrodes causes a deformation of the cell, due to ion exchanges within the electrodes. electrolyte. Examples of conductive polymer actuators that may be mentioned include polypyrrole-metal helical actuators, polyaniline fiber actuators coated with solid electrolyte polymer and copper or with polyaniline fibers covered with a polypyrrole film. The dielectric elastomer actuators may comprise a thin elastomeric film, sandwiched between two electrodes, the application of the tension causing an extension of the polymeric film in all the dimensions of the plane. The dielectric elastomer may optionally be shaped in one or more plies or in a winding, for example helical. In general, depending on the electroactive polymer used, the deformation of the actuator can be reversible or not, take place essentially in elongation, bending, contraction, in a direction, in a plane or volume. By reversible deformation, it should be understood that the actuator can move in a direction opposite to that induced by the application of the electrical voltage, either spontaneously thanks to an elastic restoring force, for example linked to the inherent elasticity of the electroactive polymer or other active component of the actuator, for example an electrode. This restoring force can still be generated by an elastic return member integrated into the actuator. The reverse deformation can still take place under the effect of a reverse excitation voltage.

When not energized electrically, the actuator can be used as a force or displacement sensor, for example. In this case, the current or potential difference created by the actuator can be analyzed to evaluate the mechanical stresses it perceives. This information can be used to monitor the skin and / or to trigger the activity of the actuator.

When it is in the form of a film, the thickness of the electroactive polymer is for example between 1 m and 2 mm, the electroactive polymer may have undergone, where appropriate, a monoxial or biaxial stretching. The electroactive polymer is for example disposed between two electrodes to which is applied a potential difference. The electrodes can be made of various materials, such as, for example, graphite, carbon black, colloidal suspensions, thin layers of metals including for example gold and silver, electrically conductive polymers, such as, for example polymers comprising a charge of conductive particles, for example silver or carbon, or ionic conductive polymers. The choice of the material of the electrode may depend on the electroactive polymer. The electrodes may cover an entire face of the electroactive polymer or alternatively only a region thereof. An actuator may, where appropriate, have a plurality of electrodes for exciting corresponding regions of the electroactive polymer. These electrodes can be arranged in a network, for example. The electrodes can be electrically isolated from keratin materials. Alternatively, at least one electrode may come into contact with keratin materials, for example in order to be able to perform electrostimulation simultaneously or not with the excitation of the electroactive polymer.

The electrical voltage suitable for activation of the electroactive polymer may depend on the properties of the latter, in particular its dielectric constant and its dimensions. For example, the electrical excitation voltage may be less than or equal to 300 V, better still 150 V, being for example between 0 and 25 V. Preferably, this voltage is a low voltage compatible with its presence in the vicinity of the materials. keratin. If higher voltages are used, it is ensured that the current can not exceed a certain limit, and the system is advantageously provided in case of electrical leakage. The response of the actuator to the excitation voltage can be a linear response or not. The actuator may comprise at least one barrier film between the active structure of the actuator and the outside, for example to prevent contact of the keratin materials with the active chemical compounds of the actuator. This barrier film is for example a film of a thermoplastic material, for example a polyolefin, PVC, polyester, polyamide, polyurethane, cellulose, etc. The actuator may optionally be contained entirely in a sealed envelope, for example a envelope formed of a thin film of a thermoplastic material sealed at its periphery, for example a transparent thermoplastic material. The barrier film may have, where appropriate, the color of the keratin materials or be makeup. The attachment of the actuator to the keratin materials can be carried out in various ways, for example by gluing. The attachment zones can be superimposed on the electroactive polymer or, alternatively, the attachment zones can be offset, the actuator transmitting the force or the displacement via one or more wire (s) or film (s) or the like. transmission members arranged in the extension of the actuator. The barrier film may be adhesive, for example being coated with a protective film prior to use. Alternatively, this film can be glued by means of an extemporaneously reported adhesive. The actuator may comprise a stack of layers comprising several layers of electroactive polymers in order to multiply the mechanical forces. The actuator may comprise: a central layer made of an elastically deformable dielectric material; at least two electrode layers on either side of the layer of dielectric material, preferably also of an elastically deformable material. The electrode layers may be covered with insulating layers, preferably elastically deformable.

The insulating layers may be made of the same dielectric material as the core layer. The dielectric material may comprise a silicone. The actuator can be integrated into a garment or an undergarment. The actuator can be integrated into a bra, panty, stockings, socks, panties or belt to be placed around the abdomen or limb. Figures 1 and 2 show an example of actuator 1 that can be used in the invention, according to some aspects thereof. This actuator 1 is in the general form of a strip and retracts when applying a voltage. The actuator 1 illustrated in these figures comprises a membrane 10 of an ion exchange polymer, for example a perfluorinated polymer, such as copolymers of tetrafluoroethylene and perfluorinated vinyl ether having ûSO 3 H or CO2CO 2H groups, sold by the company Dupont under the Nafion brand.

The ionic conductive polymer membrane 10 may be covered on each of its faces with a layer 11 of conductive polymer, for example polyaniline. This conductive polymer may be covered with a layer 12 of solid electrolyte, for example a sulphate salt. The active structure 14 thus formed can be covered, on at least one face, with a protective film 15 which is for example fixed at two opposite ends 16 and 17 to the structure 14 by means of an adhesive 18. Such an actuator is for example realized as follows. EXAMPLE 1 A film of Nafion 117 (Dupont Co Company) 0.15 mm thick, 10 mm wide and 30 mm long is immersed for 30 minutes in ethyl alcohol containing 2% of a solid electrolyte, potassium sulphate, for example. After immersion, the film is removed and allowed to dry. The polyaniline layers are deposited by immersing the film in an organic solution (n-methylpyrrolidone) of polyaniline. The film was allowed to dry at 60 ° C for 5 hours to remove the solvent. The film is then covered with a solid electrolyte layer following the same procedure as above. The solid electrolyte layer completely covers the polyaniline film.

FIG. 3 shows another example of an actuator, which is intended to work in extension, and which comprises, for example, a dielectric-type electroactive polymer 20 covered on its two faces, in a central zone 21 providing a free peripheral edge 23, an electrically conductive greasy compound 24. The actuator can be covered on both sides with metal electrodes, for example copper, coming into contact with the compound 24 and a flexible barrier film, glued on the 23. A barrier film covers the active structure of the actuator and can be used to transmit the extension of the actuator keratin materials, being glued on them. In the absence of a barrier film, the actuator can be attached directly to the active structure, for example by the border 23, to the keratin materials. Such an actuator can be made as follows. Example 2 A material comprising a mixture of dielectric silicone elastomer with dispersed titanium oxide is produced. In this, one follows the method described in the article IEEE Transactions on dielectrics and electrical insulation, Vol 12, No. 4, 2005. The dielectric silicone (reference Cine-skin A / B / C 50% silicone, Burman industries, USA) is mixed with titanium dioxide (30% by weight) (Titanic, Biossio-code 488257, Carlo Erba Italy) , pre-dried at 100 ° C. The mixture is dispersed by stirring and the crosslinking freezes the mixture at rest in the form of a film of 1 mm thick by 50 mm side. This material is then coated on both sides with the greasy and conductive compound Nyogel 755G, Teclmolube seal, USA, according to a square of 40 mm side. The flat copper electrodes 2 mm wide and 2001an thick 30 connect the two conductive layers to the voltage generator.

The actuator thus formed is then covered with a flexible plastic film forming barrier on both sides, this film covering the entire surface and being glued only on the edges. The flat electrodes are also covered with the same insulating film.

In the embodiment of Figure 4, the layer of conductive fat compound is deposited so as to provide reserves 25, also called islands, on which the electrical insulating barrier film can be glued. This or these islands are for example in a number between 1 and 20. The presence of islets may allow to transmit more uniformly the extension of the electroactive polymer barrier film, and keratin materials on which this film is fixed. The actuator can still, as illustrated in Figure 5, be filiform. The actuator comprises, for example, a core 30 of an electroconductive polymer, for example a doped polyaniline core, covered with a material 15 serving as a solid electrolyte matrix 31, one of the electrodes being for example in the form of a wire 32, for example copper, spirally wound on the sheath 31. The other arrives on the polyaniline core. Such an actuator can be made as follows. Example 3 The procedure described in the article All Polymer Actuators for Microsystems by A. Mazzoldi et al. Reference: Proceedings of the 3rd Italian Conference on Sensors and Microsystems, World Scientific Publication 1999. Di Natale and D'Amico Editors. Pages 345 to 350. In this example, the actuator comprises a doped polyaniline core coated with a sheath of a solid electrolytic matrix material, namely a mixture of propylene carbonate, ethylene carbonate, of polyacrylonitrile and ..... copper perchlorate in respective proportions 8%, 38%, 13% and 11%. The whole is covered with a copper filament that spirals around the sheath. The actuator can also, as illustrated in FIG. 6, have a helical shape, for example in the form of a ribbon 40 molded in an elastomeric polymer with a helical shape, covered on two opposite sides with a material 41 serving electrode itself covered with an insulator.

The realization of such an actuator can be done for example as follows. Example 4 An elastomeric silicone is used, for example TC 5005, A / B-C, BJB Enterprises Inc. in the USA. It is molded and cut in the form of a helical coil, as described in the article Smart Structures and Materials 2005: Electroactive Polymers Actuators and Devices, edited by Yoseph Bar-Cohen. Proceedings of SPIE Vol. 5759, page 65. An electrode material, for example a mixture of carbon black in a silicone, is applied to both sides of the helicoidal coil. The whole is covered with an insulator, for example a varnish. In the end, we obtain a globally cylindrical actuator.

Applications According to the invention, one or more electroactive polymer actuator (s) can be used on various regions of the body and the face. As illustrated in FIG. 15, an exemplary method according to the invention may comprise a step 100 of placing one or more actuators on the region (s) concerned of the body or of the face. This installation can be carried out by the person himself or by trained personnel for this purpose, for example in a beauty institute. The actuatetu- (s) can be fixed (s) on keratin materials, including glued (s) on them. The actuator (s) may also not be glued directly to the keratin materials, but simply kept in contact with them. In the case of a bonding on keratin materials, the bonding may be provided by a hypoallergenic adhesive preferably which is deposited on the keratin materials and / or the actuator at the time of its introduction. Alternatively, the glue may already be present on the actuator, for example being a pressure sensitive glue, coated prior to use of a film. removable protection. When the actuator (s) are simply held in place against keratin materials without being glued on, this maintenance can be provided for example by a garment or bandage.

Fixing the actuator on keratin materials may allow to exert on them a force tending to stretch, wrinkle or bend the keratin materials, or to exert pressure on them. The force exerted may aim to modify the appearance of the keratin materials, in particular to move the keratin materials, for example the skin or the flesh, over a distance of, for example, between 0.2 mm and 4 cm, better still 0.5 mm to 1 mm. cm. The movement may be aimed at stretching the skin, for example to reduce the appearance of a wrinkle or other defect such as, for example, orange peel or a fatty bead. The displacement may be aimed at fighting against ptosis for example.

The movement can still be exerted on the hair, for example to fight against an ear. When the actuator is attached to the keratin materials, it can still be used to exert a massage action or exfoliation. When the actuator or actuators are simply held against the keratin materials, without being directly attached thereto, the excitation of the actuator or actuators may for example be intended to exert a massage action through a relative movement between the actuator and the underlying keratin materials and / or for the purpose of exerting friction, this massage action or this friction being able to assist in the penetration of an active ingredient or a cosmetic composition or to perform a scrubbing action keratin materials. Several actuators can be excited sequentially to perform a massage, these actuators being for example arranged side by side, being integral or not with the same support. At least one actuator may be applied to or attached at least temporarily to an eyelid, in particular the lower or upper eyelid, the forehead, the cheeks, the lips, the neck, the arm, the torso, the belly, the breasts, the buttocks, one leg. The implementation of an actuator on the face may be used to change the appearance of the latter. In this case, preferably, the actuator will be small and not very visible, being for example at least partially transparent or covered with a masking film of the same color as the keratin materials, or even having a face having the same color as the keratin materials.

Returning to FIG. 15, the installation of the actuator (s) is followed by a step 110 of excitation, which can be carried out by means of an apparatus delivering a suitable electrical voltage, this apparatus being arranged for example at side of the person during the use of the actuator or alternatively being carried by the person, the apparatus comprising for example fastening means on the person such as for example a belt or a fastener for attachment to a belt . The apparatus may comprise an autonomous source of electrical energy, for example one or more cells or a battery, or alternatively be arranged to be powered by the mains. The power supply of the actuator can still be present on the same support as the actuator, as indicated above. The excitation of the actuator can be performed with a single polarity, the potential difference being higher or lower depending on the displacement to be induced. Depending on the actuator used, the excitation can also be carried out with an alternating voltage, the polarity of which changes periodically, which can make it possible to perform a series of dilations and contractions of the actuator or flexions in alternate directions. Several actuators can be excited to combine their efforts and induce greater displacement or stronger traction. The actuator can be gradually powered to induce a gradual displacement and a resultant gradual change in the area of the body to which it is applied, to allow the user to determine which modification is best suited to the result wish. Once the desired displacement has been achieved, a fixing means such as an adhesive film or a film-forming polymer may be applied to the region concerned, in order to keep it in the state where the actuator has brought it, which corresponds to step 120 in Figure 16. The holding means may be various, depending in particular keratin materials concerned. When it comes to the skin, the holding means may comprise an adhesive film to be adhered to the keratin materials. This film is preferably as thin as possible, so as not to be an inconvenience for the person, and this film may be transparent or makeup, that is to say present on the opposite side to the keratin materials, a surface appearance for the attachment of the makeup composition, including a foundation. The holding means may also comprise a film-forming composition which may be applied in the fluid state to the keratin materials, in the state in which the actuator maintains them. This crosslinking or drying composition forms a film which adheres to the keratin materials and makes it possible to maintain them in the configuration in which the actuator has brought them. Once the installation of the holding means has been carried out, the actuator can optionally be removed in a step 130, as illustrated in FIG. 17, if this removal does not harm the maintenance of the keratin materials in the position where the user wishes to leave them. . The user can possibly remove only the electrical supply conductors of the actuator. These electrical conductors can for example be very thin and separated by breaking or cutting at their connection to one actuator. Alternatively, miniature electrical connectors may be used to connect the actuator power leads. In a variant, the power supply of the actuator is effected by means of a clamp which is applied on two opposite faces of the actuator, comprising corresponding electrodes. Once the actuator can stop being energized electrically, the clamp can be removed. The use of such a clamp is particularly suitable for actuators in the form of a film. The supply of the actuator can still be carried out without contact, by induction, thanks to a coil connected to the actuator, for example formed by screen printing or removal of an electric wire or etching of a metal layer, on a same support as 1 actuator. In a variant, it is the actuator that permanently maintains the region of the body or face in the desired state and the installation of a holding means is not necessary.

The voltage applied to the actuator can be adjusted by the user by acting on a control member of an excitation apparatus, such as for example a button or a slider. Alternatively, the excitation voltage can be determined automatically by the device used to supply the actuator or by a circuit board with the actuator on the same support. The voltage is for example gradually increased by the excitation device according to a programmable ramp. In this case, the user starts the operation and the actuator is excited progressively. The user can interrupt the evolution of the applied voltage when the desired result is achieved, for example by pressing a button of the excitation device. The excitation of the actuator (s) can also be performed after a step 140 of selecting a desired appearance, as shown in Figure 18. This selection is made for example from a screen of the excitation device, offering the user several aspects of the keratin materials according to different degrees of excitation of the actuator (s). Once the aspect has been selected, the method may comprise a step 150 for calculating the modifications to be made in order to obtain the desired appearance, in particular displacements to be exerted on the keratin materials. This calculation is for example carried out by a microcomputer from at least one image of the person on which the actuator (s) will be fixed and, if necessary, measurements made on the keratin materials, for example the skin. Once the calculation is made, the appropriate voltage (s) are applied to the actuators to induce the modifications sought in step 160. FIG. 19 illustrates a method in which the person carrying the actuator (s) is observed by a camera, at the step 200, and the image is analyzed at step 210 to determine whether the desired aspect by the person is reached following the movements induced by the actuator (s). The excitation of the actuator (s) at step 220 continues according to the analysis thus performed, in order to get as close as possible to the aspect modification sought by the person. The actuator (s) can thus be excited according to an iterative process and when the appearance corresponds best to the one that is sought, holding means can be set in step 230, the excitation of the actuator (s) can then cease . The action exerted by the actuator can still depend on the response of a sensor, for example a sensor sensitive to a displacement of the skin. For example, the actuator may be excited depending on the detection of a movement of the skin, so as to counter this movement or control its amplitude. Figure 20 illustrates such a method. The latter may comprise a step 300 of placing a sensor on the keratin materials, for example a sensor sensitive to a displacement of the skin. Step 310 consists in analyzing the signals of this sensor in order to excite in step 320 the actuator in the desired manner, for example to counter the displacement above. The actuator can be used to exert pressure on the keratin materials, for example the skin, to facilitate the penetration of an asset. The actuator may exert a constant, temporary or variable pressure over time. The actuator that is used may in particular be an actuator that is capable of contraction and extension, depending on the polarity of the applied voltage. This may allow vibration on the skin and / or massage or spreading action of the composition. Figure 21 illustrates steps of a method of applying a composition involving one or more actuators. After step 400 of installing the actuator (s), the latter can be excited at step 410 in order to prepare the keratin materials, for example to stimulate the blood circulation, to exert a draining action or to perform a dermabrasion. Then, in step 420, the composition is applied after removal of the actuator (s). Fig. 22 illustrates another example of a method, in which the composition is first applied in step 500, and then the actuator (s) are set at step 510, in the region where the composition was applied. The actuator or actuators are excited at step 520, which can promote the penetration of the composition, and then are removed at step 530. Some examples of applications are described below. Example 5 An actuator made according to Example 1 is used, for example, but other actuators retracting when a voltage is applied may be suitable.

The actuator is bonded by the outer face of the barrier film 15 to one of its two longitudinal ends at the cheek, for example by means of a cyanoacrylate-based adhesive, and at the other end on the eyelid, for example half a centimeter below the lower eyelid, as shown in Figure 7.

The voltage can be applied by means of a device 3 making it possible to adjust the voltage applied to each actuator, comprising for example for each actuator a control means such as a button 60. The voltage varies for example from 0 to 3V and can be set to pull the skin under the eyelid, with a contraction ranging for example from 0 to about 3 mm.

When the user considers that he has the desired position, it can be fixed by depositing as shown in Figure 8 an adhesive holding film 5 on which, subsequently, a foundation can be applied, for example Scotch 3M. This adhesive film may have been precut to the format of the actuator, so as to cover it completely. The electrical conductors can then be separated from the actuator.

Example 6 In the example of FIG. 9, several actuators 1 are used to act on each lower eyelid. For example, according to Example 1, a series of actuators 1 30 mm long and 4 mm wide.

In the same way as for example 1, each actuator comprises a barrier film, flexible, bonded to both ends of the active structure. Four of these actuators are glued under each eyelid, vertically so that they are substantially aligned and parallel. The first arrives under the eyelid of the left eye substantially at the beginning of the eye. The second, a little off to the left, comes under the eyelid, 8 mm to the left of the beginning of the eye. The third, shifted to the left in relation to the second, arrives under the eyelid, 16 mm to the left of the beginning of the eye. Finally, the fourth, shifted to the left from the third, arrives under the eyelid 24 mm to the left of the beginning of the eye. With four other actuators, we realize the same arrangement, in symmetry on the other eye. Each of the eight actuators is electrically connected to an excitation device 3 capable of delivering to each actuator a voltage adjustable between 0 and 2.5 V.

Each actuator is activated with different voltages to modify the contour of the eye according to the desired shape. Eight potentiometers 60 allow for example to individually adjust the voltage applied to each of the actuators. At the moment when the user considers that he has obtained the desired position, he fixes the eyelid in this position by depositing an adhesive film, flesh-colored, and the threads can be removed. Example 7 In this example, illustrated in Figures 11 and 12, the actuators are used to lift the flesh of a softened region of the body, for example the flesh of the arms 10 and remedy the flaccid appearance of the arm. For example, the actuators 40 of Example 4 are used. These actuators are placed 20 cm long, 3 mm in diameter, around the flesh of the upper arms. The actuators, ten in number, are glued at one end to a hard part, for example, at the level of the shoulder, and descend to surround the flesh of the upper arm. Under the effect of the electrical excitation voltage, the actuators are stretched and raise the flesh of the upper arms. If necessary, the actuators may be concealed under a masking film 8, the same color as the skin, as shown in FIG. 9. EXAMPLE 8 In this example, one or more actuators are used to act on at least one ear. a person to restore for example a symmetry between the ears in the case of an ear initially more loose than the other. For this purpose, as shown in FIG. 13, an actuator is fixed at one end on the ear and at the other end on the skull, behind the ear. The actuator is for example of the ionic polymer type, 0.5 cm wide, 2 cm long and about 0.25 mm thick, as sold by the American company ERI, with a voltage-modulable supply of 2 at 9V and in frequency, presented in a kit called Deluxe Complimentary Package. The actuator, electrically insulated, is adhered by a hydroalcoholic solution (ethanol) of polyacrylate resin, along the ear, behind it and on the skull.

The electrodes are placed at the base of the actuator. The voltage is adjusted so that the ear takes the desired place, for example to obtain a symmetry of the two ears. In a variant, the actuator is made up by adding a pigmented cream of the same color as the skin of the user. In another variant, once the ear has reached the desired position, an adhesive retaining film or a film-forming composition, for example of the cyanoacrylate type, is positioned to hold the ear in its new position. EXAMPLE 9 In this example, the fiber-type actuators of Example 3 are used to act on the lower and upper eyelids, as illustrated in FIG. 14. The actuators 33 are for example fixed respectively at an end just below the eyelashes. of the upper eyelid. These actuators can be masked. The actuators are attached at the other end to the cheek and the brow bone. By applying a very low voltage, for example from -IV to + 1v, it is possible to stretch or relax the actuators and vary the shape of the eyelid. Example 10 In this example, the actuator is used to apply a fluid composition. The actuator is placed example applied on the cheeks, as shown in Figure 10, or on the lips (variant not shown) or elsewhere. The composition is for example a composition comprising an anti-aging active ingredient. The actuator is for example of the type capable of producing an extension, or even alternating movements extension / contraction obtained by varying the voltage is for example as described in Figures 3 and 4.

The invention is not limited to the examples which have just been described. In particular, other types of electroactive polymer actuators may be used. When applying a composition, it comprises for example any active ingredient currently used in cosmetics, especially anti-wrinkle, moisturizing, slimming, vitamins, ..., and may have various galenic forms.

The composition may comprise a self-tanner, a pigment, a dye, fillers, etc.

The composition may be an emulsion, for example an oil-in-water emulsion. In the examples which follow, an actuator having a clean elasticity is used which is expanded by applying an electric voltage, as illustrated by step 800 of the diagram of FIG. 23. It is possible to adjust the applied voltage in order to control the degree of of elongation of the actuator, and indirectly the degree of subsequent retraction under the effect of its elasticity. The actuator can be placed in the expanded state, which corresponds to step 802 of FIG. 23. Then, the excitation of the actuator is interrupted, which corresponds to step 804, so that this it contracts by elastic return and by contracting exerts a force acting on the body. The electrical excitation can be maintained for a certain duration while the actuator is in place on the body or, alternatively, the electric excitation can be interrupted before the actuator is laid, when the contraction of the latter, further when the electrical excitation is stopped, is not immediate. Example 11: Actuator to raise the turn of the face. The actuator is for example in the form of a film 700 consisting of five layers of dielectric elastomers, as shown in Figure 38. The central layer 600 is for example 501um thick. It is formed for example of a mixture of dielectric silicone elastomer with dispersed titanium oxide. In this, one can follow the process described in the article IEEE Transactions on dielectrics and electrical insulation, Vol 12, No. 4, 2005. In one example, the dielectric silicone (reference Cine-skin A / B / C 50% silicone, Burman industries, USA) is mixed with titanium oxide (30% by weight) (Titanio Biossio-code 488257, Carlo company Erba Italy), pre-dried at 100 ° C. It is dispersed by stirring, and then the crosslinking freezes the mixture at rest in the form of a film 100 mm long and 20 mm wide. The central layer 600 is covered on both sides with two layers 602 of the same dielectric silicone, containing particles of carbon black. These two layers form flexible electrodes, for example 20 m thick.

These are covered on their outer faces with a 201um thickness of the same dielectric silicone, to form the outer layers 604, which are for example 20 m thick. The film of this example is intended to lift the skin around the face, it is estimated the length of the skin to rise. For that, one can for example apply the finger on a corner of the maxillary and raise the finger towards the temple. If in this movement upward, the finger can move the skin to a height of 2 cm, we can choose to make a facelift on a distance less than half, 1 cm. Two electrically conductive wires are placed in the film, coming into contact with the flexible electrode layers 602. Then, on one of the two outer layers 604, a sticky coating is applied, for example a pressure sensitive adhesive of the solution type. 40% QA 1350 (Eastman Chemical). Without waiting, the two wires are connected to the terminals of a generator G of voltage 15 which can provide a voltage between 0 and 10000V. Under the difference of potential, the film extends. The voltage V applied is then adjusted to cause elongation of the film equivalent to the movement distance of the target skin, in this case 1 cm for example. Then the actuator is applied to the skin, along the turn of the face, the adhesive side to the skin, as shown in Figure 29 for example. We wait about 5 minutes, then remove the electrical wires. At this moment, the film 700 contracts, causing a gentle lifting effect on the skin of the face. Finally, you can make up the film to hide it. Example 12: Using actuators to raise the chest. The same actuator structure is made as in Example 11, with the difference that the shape is no longer rectangular but as illustrated in FIG. 24, with a central portion 701 of constant width, over a length L and end portions 703 of trapezoidal shape, of length The index each, for example. The maximum width at the ends is for example twice that of the central portion 701.

In addition, the thickness on the end zones is increased being, for example 150 m. The film 700 is applied to the part of the body that is considered soft, in this case the chest when it lacks firmness.

Two approaches are possible: The first is to bear on firm areas, as shown in Figure 26. In this case, the only end zones 703 of the actuator are coated with glue. The potential difference is applied to both electrode layers. Then the film 700 is placed so that one of the two end zones 703 is glued on a firm zone, in this case on the ribs, the other on the lower part of the sternum, so that the breast can rest on the intermediate zone 701 of the actuator. Once the film is installed, wait a few minutes and remove the power supply wires. This causes a raise of the chest. The second approach is to rely on soft parts of the body.

In this case, the two end zones of the actuator are glued on the soft part, in this case the bottom of the chest or the bottom of the chest and the top, as shown in Figures 27 and 28. For bonding the end zones 703 are coated with an adhesive. For greater efficiency, the intermediate zone 701 can also be coated with adhesive. A potential difference is applied to the electrode layers 602. The film 700 is applied, then the wires are removed. Example 13: Use of an actuator to enlarge the eye by acting on the lower eyelid. The same actuator structure is made as in Example 11, except that the film 700 is only 20 mm long, 20 mm wide. Moreover, the central layer 600 is only 401um thick, the electrode layers 602 and the outer layers 604 are only 101um thick. It is estimated the desired enlargement in terms of opening. Typically, it is possible to aim at an opening of 500 μm to 2 mm. A potential difference across the two electrode layers 602 is applied to cause the film 700 to expand about twice as much as the desired eyelid displacement. Thus, for a desired extension of 500 μm, the voltage is adjusted so that the film extends 1000 μm. In this case, a ddp of about 1000V may be necessary. One of the two outer layers 604 is applied to an adhesive, if possible with a rapid setting (for example a cyanoacrylate type).

Then, after application, as shown in Figure 30, the power supply wires are removed. The eye opens then about 5001um. The elasticity of the device allows the skin to move, when blinking, for example. Everything can then be made up.

Example 14: Use of an actuator to enlarge a constricted eye by acting on the upper eyelid. The same actuator structure is made as in Example 13, with the difference that the film is only 30 mm long and 8 mm wide. A potential difference across the two electrode layers is applied to cause an extension of about 20%. One adhesive is applied to one of the two outer layers, if possible fast setting. Then apply the film above the upper eyelid to raise the clamped part, as shown in Figure 31. If the shape of the eyelid allows, the second outer layer can also be covered with glue, and the film can be housed in the crease of the eyelid. Then after application, we remove the son. Under the effect of the contraction of the actuator, the eye opens by partially masking the bridled appearance of the eye, but retaining the flexibility. It may be useful to fix on the skin, for example that of the face, an actuator that is electrically biased so as to undergo a succession of cycles of extension and contraction. The actuator can be attached to the skin with a pressure-sensitive adhesive. Example 15 Device adapted to the face for its maintenance. An actuator is produced according to Example 11, with the difference that the thickness of the central layer 600 is increased for example to 250 μm. In addition, its width and length are equal to 60 mm.

We can start the treatment with a learning phase. This consists in putting the actuator on the skin of the subject, previously coated with a layer of pressure-sensitive adhesive. The electrode layers are connected to a generator capable of delivering voltages ranging from 0 to 10,000 V and which can also modulate the voltage in alternative form. The frequency can also be modulated in the range of 0.001 Hz to 5.000 Hz, for example. The voltage is applied at a starting frequency, for example 1 Hz and with a peak voltage of 1000V. By varying the peak voltage and the frequency, the subject 10 can inform the operator on the features that seem comfortable to him. We can continue by treating the subject, regularly, for example every night, on the cheeks or under the eyes, according to a selected mode that does not cause discomfort. Solicitation of the inner layers of skin and skinning muscles can strengthen the skin. Example 16: Use of an actuator for the prevention of stretch marks. The actuator can be produced according to Example 11. The actuator is applied to the skin of the body, giving priority to the areas likely to undergo stretch marks. The actuator can be used in times when the body can grow and the use can be done in combination with weight tracking. Weight tracking can determine, depending on age, size in particular, whether the actuator should be used or not. The actuator is recommended, in case of weight gain, on certain parts of the body, for example the thighs, the buttocks, the breasts, the belly. 25 Moreover, the actuator is recommended at the time of menstruation, on breasts, even if the weight of the model does not increase. The actuator can be used as follows: One of the faces of the actuator is coated with an adhesive. A voltage ranging from a few hundred volts to a few thousand volts is applied by means of wires connected to the electrode layers. Then, we stick the actuator on the part of the body that is considered likely to suffer from stretch marks.

After a few minutes, the voltage is removed. We can remove the wires or leave them. If left, the voltage can be reapplied regularly to lengthen the actuator. After a few minutes in this state, the tension is removed again, and so on. These cycles make it possible, on the one hand, to keep the areas that should not stretch in contention, but also to strengthen them. Mechanical Solicitations of the Skin: To treat the sore skin and help it regenerate It is known that in the case of burned skin, it is necessary to help the skin by massaging, lengthening or compressing it. Thus, it limits the effects of cardboard skin regeneration. This principle can be used to help sore skin by the sun. Thus, we practice certain movements, including extensions or compressions, during the period from the appearance of erythema to the disappearance of erythema. We can not even wait for the appearance of erythema and practice these movements as soon as we have finished exposure to the sun. The principle is to use an actuator applied to the skin, which is forced to expand or compress. This extension or compression can be maintained over time or be released regularly. Release cycles can be carried out loosening or extending compression or relaxation. It is also possible to apply a cyclic potential difference for a massage effect. These methods can be used with or without added products. Thus, the actuator films can be pierced with holes allowing the application and diffusion of a fatty fluid, for example to the skin. It is also possible to use to adhere the film to the skin an adhesive containing at least one active product such as an analgesic. EXAMPLE 17 Treatment of the sore skin in extension mode An actuator made for example with the film of Example 11, whose shape in width and length is adapted to the zone to be treated, for example a few square centimeters to several, is applied. dozens of square centimeters. The actuator is coated on one side with an adhesive. Then two wires are connected to the electrode layers.

We stick the actuator on the skin. The voltage is applied, for example a few hundred volts. This keeps the skin for several hours. Example 18: Treatment of sore skin in massage mode The method is substantially the same as in the previous example, with the difference that the voltage is varied at a frequency ranging from 0.001 Hz to 5000 Hz. These methods can be used to avoid skin compaction and lack of oxygenation caused by certain situations, for example in order to treat naturally unvascularized areas, for example because the subject is in a sitting or lying position, as is the case of people who are stuck or traveling, and / or areas that are sore by heat, electricity, intense light, sunburn, surgery or immersion. These methods can also be used with pre-treatments or post-treatments, for example treatments related to the administration or application of anesthetics, analgesics, anti-inflammatories, botox, etc. skin care It is possible to produce clothing such as undergarments, incorporating at least one actuator arranged to come or not in contact with the skin, in order to exert a massage action and / or contention.

Underclothing for the care of the skin A piece of flexible clothing, for example a knitted fabric or soft lace, is incorporated into an actuator, for example made according to example 11. The actuator is glued to the fabric in its face. internal. The actuator may cover the same surface as all or part of the piece of clothing. In the case of a bra-type undergarment, the actuator can cover the area of the cups, as illustrated in FIG. 32. In the case of a panty-type or panty-type undergarment, the actuator can cover the gluteal portion and in particular the area where the buttocks join the thighs, as shown in Figure 34. One can also make an undergarment to cover the belly, consisting of a piece of fabric that goes around belly, in a fairly flexible fabric, knitted for example, as shown in Figure 33.

In a hidden location of the undergarment, for example near the straps in the case of a bra or near the belt in the case of a panty, two son can be connected to the two electrode layers. Where appropriate, as illustrated in Figure 32, the electric generator can be integrated with the textile article. The size of the garment does not need to be adjusted closer to the body. For example if the model has a size corresponding to 90B, we will choose a bra size larger: 95C for example. If the model size 40, we will choose a panty size 42.

Just before putting on the undergarment, the actuator is put in charge by imposing a tension of approximately 1000V. After donning the undergarment, the threads are removed. This causes an effect on the elasticity of the skin and preventing the extension of the skin. This is especially indicated for areas susceptible to stretch marks, and the garment is especially indicated during weight gain.

To remove the underwear, you can possibly reconnect the tension to enlarge the actuator (s). Thus, the garment is removed without difficulty because it regains the starting size. This is also applicable to other items such as socks, tights, stockings, shoes, t-shirts, shirts, gloves, actuators particularly suitable for clothing that, to stay in place, are forced to tighten the body, such as as for example stockings, tights or gloves. EXAMPLE 19 Underwear for the Legs and the Depilatory Arms As shown in FIG. 25, a piece of flexible garment 900, for example a knitted fabric or supple lace, is integrated with a film 700 according to the example 11. The film 700 can be glued to the fabric 900 on its outer face. The whole can also be covered with a second layer of fabric 905, itself flexible. In this case, the film 700 is sandwiched between the two layers of fabric, which corresponds to the example shown in FIG. 25. The film may cover the same surface as all or part of the piece of clothing. In the case of a sock, the film can cover the entire fabric area. In the case of stockings or tights, the film may cover only the lower zone, under the knees. In the case of high type gloves, which go up the length of the arm, the film may cover the entire surface or be present only on the area from the wrist to the top of the glove. The film is equipped with two wires that are connected to a power supply. The tissue of the inner face, that is to say the one that will be in contact with the skin, is chosen to grip the hair. Thus, some mesh or weave will be used, leaving the hair likely to get stuck in the fabric. The fabric of the inner face is held integral with the film of the actuator, for example by gluing. Once the garment is in place, such as socks or gloves, the wires are connected to an electric generator. The generator varies the voltage regularly. The cycles can be sinusoidal oscillations (ranging from -1000 V to 1000 V for example) at variable frequencies, for example of the order of 1 Hz. The cycles can be abrupt changes in voltages (in lms for example) followed trays where the tension remains constant.

These movements provide an embellishment of the skin by creating an effect limiting the visibility of the hair and resulting in slight desquamation, and help the blood circulation. It is possible to combine treating compositions (oils, moisturizers, etc.), desquamating compositions (abrasives such as alumina), chemical peel compositions (glycolic acid in solution) or chemical depilatory compositions (based on mercaptan). Example 20: Cloth with Weft Films made of strips of actuator films of size 10 cm long and 3 mm wide are produced.

Then we perform the screening shown in Figure 35, which combines actuators 700 and 750 son other than actuators. These yarns may be of cotton, cellulose, linen, polyamide resin, wool and other artificial or blended fibers. Thereafter, the actuators 700 are electrically connected as shown in FIG. 36. The energization generates a monodirectional elongation in the direction of the actuators 700. This fabric can be applied directly to the body (by adhering the surface) or can form any or part of a garment.

Actuators 700 can also be connected in the manner illustrated in FIG. 37 by connecting them to a power supply system that makes it possible to address each actuator 700 individually. An electronic control system makes it possible to deform the fabric in different ways, for example by contracting some fibers rather than others.

Finally, the wefts of the fabric may be different from those illustrated in FIGS. 35 to 37 and integrate, for example, actuators in both axes, for a more precise control of the applied pressure. The expression having one must be understood as being synonymous with having at least one.

Claims (23)

REVENDICATIONS1. Cosmetic treatment process, comprising the steps of: al) setting up at least one electroactive material actuator, preferably an electroactive polymer, on the keratin materials, b) exciting the actuator so as to induce a continuous movement of the keratinous material at least as long as the actuator is in place, or a2) exciting the actuator so as to induce deformation thereof, b2) setting up the actuator, in particular by fixing it on the keratin materials, and c2) modifying the excitation of the actuator, so that the actuator induces a displacement of the keratin materials. 2. Method according to claim 1, comprising the steps a2) to c2). 3. Method according to claim 2, the actuator being elastically deformable and the actuator inducing a movement of keratin materials when it returns to its initial configuration. 4. The method of claim 3, the modification of the excitation in step 2c) corresponding to the termination of the excitation. 5. Method according to claim 4, stopping the electrical excitation of the actuator accompanied by a disconnection of the electrical supply conductors of the actuator. 6. Method according to any one of claims 1 to 5, the actuator being used, in particular being fixed on the body, so as to change the appearance of the chest. 7. Method according to any one of claims 1 to 5..5, 1'actuateur being fixed on the face so as to lift the skin around the face. 8. Method according to any one of claims 1 to 5, the actuator being fixed on the face so as to act on the lower or upper eyelid, in particular to enlarge the eye. 9. Method according to any one of claims 1 to 8, the actuator coming into contact with the skin. 10. Method according to any one of claims 1 to 8, the actuator does not come into contact with the skin. 11. A method according to any one of claims 1 to 10, the actuator being glued to the skin or attached to a garment or under garment. The method of claim 9, wherein the actuator is bonded to the skin on end regions only. 13. Method according to one of claims 11 or 12, the actuator being bonded to the skin with a pressure-sensitive adhesive. 14. The method of claim 9, the actuator being used to mechanically stress the skin in order to strengthen it. 15. Method according to any one of claims 1 to 6, the actuator being integrated in a garment or an undergarment. The method of claim 15, wherein the actuator is integral with a bra, panty, stockings, socks, pants, or belt to be placed around the abdomen or an abdomen. member. 17. A method according to any one of the preceding claims, the actuator comprising: a central layer of an elastically deformable dielectric material, at least two electrode layers on either side of the layer of dielectric material, preferably also in an elastically deformable material. 18. The method of claim 17, the electrode layers being covered with insulating layers, preferably elastically deformable. 19. The method of claim 18, the insulating layers being made of the same dielectric material as the core layer. 25 20. The method of claim 17, the dielectric material comprising a silicone. ......................... A cosmetic treatment process in which an electroactive material actuator is cyclically excited to act on a body or face region and wherein at least one of the amplitude and frequency is determined as a function of information from the subject on which the actuator is placed. 22. Method according to any one of the preceding claims, wherein the keratin materials are chosen from the skin, the mucous membranes or the keratinous fibers, in particular the hair or the eyelashes. 23. A method according to any one of the preceding claims, the actuator (s) being electroactive polymer.