CONDITIONING FOR SEBUM REMOVAL AND FRAGRANCE DIFFUSION

Abstract

CONDITIONING FOR SEBUM REMOVAL AND FRAGRANCE DIFFUSION The disclosure proposes sebum-absorbing articles that include a dry shampoo powder for removing sebum from a subject's hair without any direct contact of the dry shampoo powder with the subject's hair, as well as related devices, necessities, and procedures. The approaches in the disclosure prevent the dry shampoo powder from settling on the subject's hair and provide a cleaner dry shampoo experience. Figure for abstract: none

Description

Title of the invention: CONDITIONING FOR SEBUM REMOVAL AND PERFUME DIFFUSION SUMMARY

[0001] This summary is provided to present a selection of concepts in a simplified form, which are described in greater detail below in the detailed description. This summary is not intended to identify key features of the claimed subject matter, nor to be used as an aid in determining the scope of the claimed subject matter.

[0002] In one aspect, the disclosure proposes an absorbent substrate article, comprising: a hair contact layer including a lower portion for contact with the hair of a subject; a dry shampoo layer attached to an upper portion of the hair contact layer and a deformable layer attached to an upper portion of the dry shampoo layer; wherein the contact of the lower part of the contact layer with the hair of the subject facilitates the removal of sebum from the hair of the subject by the dry shampoo layer without direct contact of the dry shampoo layer with the hair of the subject.

[0003] In embodiments, the hair contact layer comprises a non-woven material.

[0004] In embodiments, the hair contact layer is configured to absorb sebum from the subject's hair.

[0005] In embodiments, the dry shampoo layer comprises a dry shampoo powder composition configured to absorb sebum from the hair of the subject of the hair contact layer.

[0006] In embodiments, the contact of the hair contact layer with the subject's scalp can deform the deformable layer and the absorbent substrate article on the basis of the curvature of the subject's scalp.

[0007] In embodiments, the deformable layer comprises a spongy material, a hydrogel material, an elastic material, a thermally conductive material or any combination thereof.

[0008] In embodiments, the absorbent substrate article comprises a perfume infused in the hair contact layer, the dry shampoo layer, the deformable layer, or any combination thereof.

[0009] In embodiments, the absorbent substrate article includes an adhesive fixed to an upper portion of the deformable layer to fix the absorbent substrate article to a surface.

[0010] In embodiments, the surface is a curved portion of a head of a device for the waterless removal of sebum from the subject.

[0011] In embodiments, the dry shampoo layer comprises a dry shampoo powder composition including dry shampoo powder particles having average particle sizes that are substantially larger than the average pore sizes of the hair contact layer to separate the dry shampoo powder particles from the subject's hair and prevent contact of the dry shampoo powder particles with the subject's hair.

[0012] In embodiments, the absorbent substrate article is formed by a process which includes: assembling a dry shampoo composition of the dry shampoo layer on the deformable layer and bringing the dry shampoo composition into contact with a non-woven material of the hair contact layer to compress and compact the dry shampoo composition to form the dry shampoo layer sandwiched between the deformable layer and the hair contact layer.

[0013] In one aspect, the disclosure proposes a waterless device for the removal of sebum from a subject, the device comprising: a head including an air duct in the head and an air vent fluidly connected to the air duct of the head and an absorbent substrate article configured to be positioned on the head of the device; wherein the air duct and the air vent of the head are configured for the passage of a heated airflow through them, and wherein the heated airflow is configured to come into contact with the sebum, heat and soften the sebum on the subject to facilitate the removal of the sebum from the subject.

[0014] In embodiments, the absorbent substrate can be removably fixed with curved portions of the head to come into contact with the hair displaced by a Coanda effect formed by the device and absorb the sebum from the hair during use.

[0015] In embodiments, the shapes of the heated airflow are modified, changing from linear airflow shapes to curved airflow shapes based on a Coanda effect formed by the device, so that the curved airflow shapes approach the shapes of the curved portions of the device head.

[0016] In one aspect, the disclosure proposes a kit for the waterless removal of sebum from a subject, the kit comprising an absorbent substrate article, a device, or both; and instructional material to provide instructions to a user for the use of the kit for the removal of sebum from the subject.

[0017] The proposal of eco-responsible and environmentally friendly solutions, which are designed and developed taking environmental issues into account, This is becoming a major objective in an effort to address global challenges. In this context, it is important to develop processes for applying cosmetic products that have a better carbon footprint and are more energy and water efficient. Description of the drawings

[0018] [Fig.1A] [Fig.1A] represents an illustration showing a side view of an example of an absorbent substrate article, according to aspects of disclosure.

[0019] [Fig.1B] [Fig.1B] represents a photograph showing a side view of an example of an absorbent substrate article, according to aspects of disclosure.

[0020] [Fig.2A] [Fig.2A] represents a photograph showing the deposition of dry shampoo powder particles on a subject's hair due to direct contact of dry shampoo with the subject's hair, according to aspects of the disclosure.

[0021] [Fig.2B] [Fig.2B] represents a photograph showing the absence of dry shampoo powder particles on a subject's hair due to the absence of direct contact of dry shampoo with the subject's hair, according to aspects of the disclosure.

[0022] [Fig.3A] [Fig.3A] represents a close-up photograph showing the hair of a subject after the use of a traditional hair-cleansing shampoo, according to aspects of the disclosure.

[0023] [Fig.3B] [Fig.3B] represents a close-up photograph showing the subject's hair after use of an absorbent substrate article, according to aspects of the disclosure.

[0024] [Fig.3C] [Fig.3C] represents a close-up photograph showing the subject's hair after the use of a dry shampoo product, according to aspects of the disclosure.

[0025] [Fig.4] The [Fig.4] represents a flowchart of an example of a process for making an absorbent substrate article, according to aspects of disclosure.

[0026] [Fig.5A] The [Fig.5A] represents a diagram illustrating an example of the Coanda effect, according to aspects of disclosure.

[0027] [Fig.5B] Fig.5B represents a diagram illustrating an example of the Coanda effect of an example of a subject's sebum removal device, according to aspects of disclosure.

[0028] [Fig.5C] The [Fig.5C] represents a diagram of an example of a device for removing sebum from a subject, according to aspects of disclosure.

[0029] [Fig.5D] Fig.5D represents a side view and diagram of an example of a subject's sebum removal device, as well as pressure sensors and other device components, according to aspects of disclosure.

[0030] [Fig.6A] Fig.6A represents a bottom view of an example of a device for removing sebum from a subject, according to aspects of disclosure.

[0031] [Fig.6B] Fig.6B represents a top view of an example of a subject's sebum removal device and examples of substrates that can be attached for use with the device, according to aspects of disclosure.

[0032] [Fig.6C] Fig.6C represents a front view of an example of a subject's sebum removal device, as well as an example of use of the device, according to aspects of disclosure.

[0033] [Fig.6D] Fig.6D represents a front view of a subject's hair before (left) and after (right) the use of an example of a device for removing sebum from the subject's hair, showing the lifting of the hair following the removal of sebum, according to aspects of disclosure.

[0034] [Fig.7A] Fig.7A represents a perspective view of an example of a subject's sebum removal device and examples of attachable substrates for use with the device, according to aspects of disclosure.

[0035] [Fig.7B] Fig.7B represents a perspective view of an example of a subject's sebum removal device and an example of a scented substrate that can be attached for use with the device, according to aspects of disclosure.

[0036] [Fig.7C] Fig.7C represents a perspective view of an example of a device for the removal of sebum from a subject, according to aspects of disclosure.

[0037] [Fig.7D] Fig.7D represents a perspective view of an example of a subject's sebum removal device, with a substrate base and substrate base fixing element disassembled and showing air vents from the device head, according to aspects of disclosure.

[0038] [Fig.7E] Fig.7E represents a cross-sectional perspective view of an example of a device for removing sebum from a subject, according to aspects of disclosure.

[0039] [Fig.7F] [Fig.7F] represents a perspective view of a substrate base and of a substrate base fixing, showing airflow over curved portions of the substrate base, according to aspects of disclosure.

[0040] [Fig.7G] Fig.7G represents a perspective view of an example comb design for a device for removing sebum from a subject; the device shown is configured to make contact with the subject's scalp for the removal of sebum, according to aspects of disclosure.

[0041] [Fig.8A] The [Fig.8A] represents a perspective view of an example of a heating element adjacent to an example of a fan, with temperature values ​​indicated at different distances from the heating element shown, according to aspects of disclosure.

[0042] [Fig.8B] Fig.8B represents a graph illustrating the viscosity of sebum at different temperatures, according to aspects of disclosure.

[0043] [Fig.8C] Fig.8C represents a graph illustrating the sebum removal performance under different conditions, according to aspects of disclosure.

[0044] [Fig. 8D] Figure 8D shows a graph illustrating examples of the effects of heat on sebum removal performance under different conditions, according to aspects of the disclosure. The results show that an example of a device and method using a heated airflow can remove more than 35% of the sebum at 50°C, and that sebum removal is 29 to 32% under conditions at 40°C and 45°C.

[0045] [Fig.8E] Fig.8E represents a graph illustrating the effect of temperature on migration distance, according to aspects of disclosure.

[0046] [Fig.8F] Figure [Fig.8F] represents a graph illustrating the effectiveness of the elimination of sebum under different temperature conditions, according to aspects of disclosure.

[0047] [Fig. 8G] Figure 8G shows a graph illustrating the results of a high-friction test corresponding to sebum removal under different conditions with a non-woven substrate, according to aspects of the disclosure. The results show that an example of a device and method can remove approximately 35 to 48% of the sebum, and that a longer duration of use of the device can result in increased sebum removal.

[0048] [Fig.9A] Fig.9A represents a cross-sectional view of examples of curved portions of a sebum removal device, according to aspects of disclosure.

[0049] [Fig.9B] The [Fig.9B] represents illustrations of airflow and images of uses of sebum removal devices with different slopes and aerodynamic properties, according to aspects of disclosure.

[0050] [Fig.9C] The [Fig.9C] represents a cross-sectional view of examples of curved portions of a sebum removal device, as well as illustrations of the use of curved portions of different shapes of a sebum removal device, according to aspects of disclosure.

[0051] [Fig.9D] The [Fig.9D] represents an illustration of an example of an experimental setup for measuring the physical properties of hair with the use of a sebum removal device, according to aspects of disclosure.

[0052] [Fig.9E] Fig.9E represents examples of results from an experiment measuring the physical properties of hair with the use of a sebum removal device, according to aspects of disclosure.

[0053] [Fig.1OA] Fig.1OA represents a flowchart of an example of a process for removing sebum with heat, according to aspects of disclosure.

[0054] [Fig.1OB] Fig.1OB represents a flowchart of an example of a sebum removal process with a Coanda effect, according to aspects of disclosure.

[0055] [Fig.1OC] Fig.1OC represents a flowchart of an example of a method for maintaining an operating temperature of a heated airflow of a sebum removal device, according to aspects of disclosure.

[0056] [Fig. 10D] The [Fig. 10D] represents a flowchart of an example of a method for controlling a heating mode of a sebum removal device based on the distance of the air vents from the scalp of a subject during use, according to aspects of disclosure.

[0057] The foregoing aspects and many associated advantages of the present invention will be more readily appreciated as they are better understood with reference to the detailed description that follows, when taken in conjunction with the accompanying drawings. Detailed description

[0058] Water scarcity is a serious situation in which the demand for water exceeds the availability of water and is a growing concern given rapid urbanization and climate change. Water scarcity is increasingly worrying, particularly in urban areas, where it is projected that one-third to nearly half of the world's urban population will face water scarcity by 2050 (He, C., Liu, Z., Wu, J. et al. Future global urban water scarcity and potential solutions. Nat Commun 12, 4667 (2021)). While significant investments in infrastructure should help meet demand and combat water scarcity, limiting water consumption at the individual level is another option that could help alleviate the demand for this precious natural resource.

[0059] On an individual level, water is generally used for washing, cleaning, and food preparation. Sebum includes all the natural oils produced by the body's sebaceous glands, and a primary reason why many individuals wash so frequently is due to the accumulation of sebum on the scalp and hair, which can lead to a feeling of greasy or oily hair or oily or oily skin and a progressively subjective feeling of dissatisfaction with this condition, or even, in some cases, anxiety. A typical process for removing sebum or oil from the hair may involve an individual obtaining water, wetting their hair, lathering shampoo and washing their hair, rinsing out the shampoo, and drying their hair, including a pre-drying step with a towel and optionally blow-drying the hair. hair and, ultimately, removes the water from the hair that was used to remove sebum or oil with shampoo or soap.

[0060] Although it is possible to use bidets and other low-water washing systems, there is also a significant and ongoing need for waterless sebum removal approaches that are effective enough to replace at least some washing sessions and allow individuals to reduce their washing frequency and water demand. These approaches should also allow individuals to maintain hygiene even in situations where access to water is nonexistent or limited, such as outdoors or in emergency situations. The present disclosure addresses these and other long-unmet needs in art.

[0061] Therefore, in various aspects, the disclosure proposes an absorbent substrate article that can be used alone or with a device of the disclosure. The article allows for the waterless removal of sebum from a subject's hair or scalp using a dry shampoo composition, without any direct contact of the dry shampoo composition with the subject's hair or scalp. In this way, the dry shampoo composition does not deposit on the subject's hair or scalp, which remains clean and free of sebum and dirt.

[0062] Figure [1A] shows an illustration of a side view of an example of an absorbent substrate article. An absorbent substrate article 1 comprises a hair contact layer la comprising a lower portion Id for contact with a subject's hair; a dry shampoo layer 1b attached to an upper portion le of the hair contact layer; and a deformable layer le attached to an upper portion If of the dry shampoo layer. Contact of the lower portion Id of the hair contact layer la with the subject's hair facilitates the removal of sebum from the subject's hair by the dry shampoo layer 1b, without contact of the dry shampoo layer 1b with the subject's hair. As shown in [Fig.[lB], the deformable layer le can be above the dry shampoo layer 1b and the hair contact layer la can be below the dry shampoo layer 1b, so that the dry shampoo layer 1b is sandwiched between the two layers to fix a dry shampoo composition, for example, a dry shampoo powder, in it.

[0063] As shown in [Fig. 1A], the thicknesses of the layers (la, 1b, le) can be varied to achieve the desired extraction of sebum from the subject's hair and scalp, which may depend, among other factors, on the materials and compositions of each layer. In some embodiments, the hair contact layer la comprises a non-woven material. In other embodiments, the hair contact layer la is configured to absorb sebum from the hair of the subject. In embodiments, the dry shampoo layer 1b comprises a dry shampoo powder composition configured to absorb sebum from the subject's hair from the hair contact layer la, for example, so that the hair contact layer la can absorb additional sebum and, in this way, the sebum can flow efficiently from the scalp or hair into the hair contact layer la, from where it can be removed by one or more dry shampoo compositions of the dry shampoo layer 1b, which can interact with the sebum.In some embodiments, the contact of the hair contact layer with the subject's scalp can deform the deformable layer and the absorbent substrate article based on the curvature of the subject's scalp, for example, to increase the surface area of ​​the scalp in contact with the article, for better sebum removal. In some embodiments, the deformable layer comprises a spongy material, a hydrogel material, an elastic material, a thermally conductive material, or any combination thereof.

[0064] In embodiments, the absorbent substrate 1 comprises a fragrance infused into the hair contact layer 1a, the dry shampoo layer 1b, the deformable layer 1, or any combination thereof. In embodiments, the absorbent substrate 1 comprises an adhesive attached to an upper portion 1g of the deformable layer 1 for attaching the absorbent substrate 1 to a surface. In embodiments, the surface is a curved portion of the head of a device for the waterless removal of sebum from the subject, for example, as disclosed herein. In embodiments, the dry shampoo layer 1b comprises a dry shampoo powder composition that includes a starch, a surfactant, a detergent, or any combination thereof.

[0065] In examples of embodiments, a dry shampoo powder composition that can be implemented with various aspects of the disclosure may include a commercially available dry shampoo powder composition. In embodiments, the dry shampoo powder composition may include butane, denatured alcohol, propane, aluminum starch octenylsuccinate, oryza sativa starch / rice starch, diisopropyl adipate, disteardimonium hectorite, limonene, linalool, tocopheryl acetate, ascorbyl palmitate, butylene glycol, helianthus annuus seed extract / sunflower seed extract, citral, hydroxycitronellal, geraniol, and a perfume / fragrance.In examples of embodiments, the "Fresh Affair" dry shampoo from Kérastase Paris can be used; it can be obtained commercially from Kérastase Paris (for example, the "Fresh Affair" dry shampoo from Kérastase).<https: / / www.kerastase-usa.com / shampoos / fresh-affair-dry-shampoo.html> . . Accessed May 28, 2024.). However, other dry shampoos may be used without departing from the scope and spirit of the disclosure, including those whose particle size is, at least on average, greater than the average pore size of a hair contact layer of the disclosure.

[0066] Accordingly, in particular or according to preferred embodiments, the dry shampoo layer comprises a dry shampoo powder composition including dry shampoo powder particles having particle sizes that are, on average, larger or substantially larger than the average pore sizes of the hair contact layer. By using a dry shampoo with an average particle size larger than the average pore size of the hair contact layer, it is possible to ensure effective separation of the dry shampoo powder particles from the subject's hair and to prevent or reduce contact of the dry shampoo powder particles with the subject's hair, thereby preventing the deposition of dry shampoo powder particles on the subject's hair. This helps the subject's hair become cleaner and shinier, with less sebum and without the deposition of dry shampoo residue.

[0067] Figure 4 shows a flowchart of an example of a process 2 for manufacturing an absorbent substrate article. A process 2 may include a step 2a of infusing perfume and / or dry shampoo composition onto a spongy material and a step 2b of conditioning the perfume and / or dry shampoo composition on the spongy material with a nonwoven material to form an absorbent substrate article. In some embodiments, the process 2 may include a step 2c of adding an adhesive to the spongy material to form an adhesive backing, and may include a step 2e of contacting the adhesive backing with a device to bond the article to the device for use with the device. In some embodiments, the article may be used without a device, for example, in step 2d.Accordingly, in various embodiments, the absorbent substrate article is formed by a process which includes: assembling a dry shampoo composition (e.g., dry shampoo layer / for example, perfume and / or dry shampoo composition) onto the deformable layer (e.g., spongy material) and bringing the dry shampoo composition into contact with a non-woven material (hair contact layer) to compress and compact the dry shampoo composition to form the dry shampoo layer sandwiched between the deformable layer and the hair contact layer.

[0068] Figure 2A shows a photograph of the deposition of dry shampoo powder particles on a subject's hair due to direct contact of dry shampoo with the subject's hair, for example, as shown in the photograph. produced due to the direct use of dry shampoo powder. [Fig. 2B] shows a photograph demonstrating the absence of dry shampoo powder particles on a subject's hair due to direct contact of dry shampoo with the subject's hair, for example, as occurs due to the use of an absorbent substrate item.

[0069] Other views are shown in [Fig. 3A] (order; normal shampoo), [Fig. 3B] (disclosure absorbent substrate item), and [Fig. 3C] (dry shampoo alone). As demonstrated at least by the results shown in Figures 3A-3C, the use of a disclosure absorbent substrate item for the removal of sebum from a subject's hair and / or scalp results in the removal of dry shampoo powder particles from the subject's hair, while also effectively removing sebum from the subject's hair.

[0070] In various aspects, an absorbent substrate for the release can be used alone for sebum removal, and / or can be used in combination with a release device for sebum removal. Release devices can make practical use of the Coanda effect to converge heated airflows onto a concentrated area and bring hair strands into contact with an absorbent substrate, so that the sebum is heated, softened, and transferred to the substrate for waterless removal of sebum from a biological surface such as the skin, hair, or scalp of an individual. The Coanda effect, illustrated in [Fig. 5A] as a general example, occurs when an airflow 3b attaches to a surface 3a near a curved object 3, and remains attached to the surface 3a even when the surface 3a moves away from the initial direction of the airflow 3b.This results in a deviation in the shape of the airflow as it passes by the curved object 3. An example of a configuration 4 of curved portions 4a of a waterless sebum removal device is shown in [Fig. 5B]. In the configuration 4 shown, the theoretical direction of the airflow 4b differs from the actual observed direction of the airflow 4c, due to the Coanda effect. In the context of an apparatus or device for use with a subject's hair, according to the disclosure, a Coanda effect, resulting from the passage of an airflow from a nozzle over curved surfaces, shapes the subject's hair and causes it to adhere to the curved surfaces.According to certain aspects of the disclosure, the absorbent substrate items can be placed on curved surfaces, so that when the individual's scalp or hair comes into contact with the absorbent substrate items due to the Coanda effect, sebum can be easily transferred from the scalp or hair to the absorbent substrate items for efficient and waterless removal of sebum.

[0071] Any one of the various components of a waterless sebum removal device can be implemented according to embodiments. As shown Figure 5C shows a schematic of an example of a device 6 for removing sebum from a subject, which includes a battery 6b that is functionally connected to a charger 6a. The battery 6b is also functionally connected to a power supply board 6c, which is in turn functionally connected to one or more heat-generating elements 6d (e.g., a heating element or a resistance heating element; e.g., a heating coil). The heat generation by the power supply board 6c can be controlled by a control board 6e, which is functionally connected to one or more heat-generating elements 6d and to one or more airflow-generating elements 6f (e.g., a fan; e.g., a rotary fan).The airflow generation element(s) 6f generate(s) an airflow that passes through an air duct design 6g of the device and, in some embodiments, produces a Coanda effect. The Coanda airflow can also be heated by the heat generation element(s) 6d for a targeted energy output 6h as a result of using the device.

[0072] Although any battery or power source can be used for an example of a device 6, in at least some embodiments, a rechargeable battery 6b is used and can be recharged using a charger 6a. Recharging the rechargeable battery 6b by the charger 6a can be done by wired charging, for example, with physical electrical contacts between the rechargeable battery 6b and the charger 6a, for the application of a voltage from a power source, such as an AC outlet, in order to recharge the rechargeable battery 6b. However, in other implementations, recharging the rechargeable battery 6b by the charger 6a can be done by wireless charging, for example, by contactless coupling or electromagnetic coupling between the rechargeable battery 6b and the charger 6a.In such implementations, the charger 6a can act as a charging station, near which the device 6 can be placed for inductive charging of the rechargeable battery 6b by the charger 6a. In these and other implementations, wireless charging can be achieved by passing an alternating current through an induction coil in the charger 6a, such that the moving electrical charge creates a magnetic field whose intensity fluctuates according to the fluctuations in the amplitude of the electrical current, and the changing magnetic field induces an alternating electrical current in an induction coil of the device 6 which passes through a rectifier to be converted into direct current (DC), which is used to recharge the rechargeable battery 6b.Although examples of wired and wireless battery charging implementations are provided here, any suitable wired or wireless charging implementation may be used without departing from the scope and spirit of the disclosure.

[0073] As shown in [Fig. 8A], an example of a heating element can be placed adjacent to an example of a fan, so that the fan generates an airflow and the heating element heats the airflow to produce a heated airflow during operation. The temperature values ​​shown, taken at different distances from the heating element, illustrate the decrease in temperature with increasing distance from the heating element. Since a user may place a device distal or proximal to a subject's head for sebum removal treatment, there may be a risk of heat damage to the hair or scalp, for example, if the air reaching the subject's hair or scalp is too hot.

[0074] Accordingly, as shown in [Fig. 5D], elements 7 of an example of a device for removing sebum from a subject are presented. A waterless device for removing sebum may include a head portion 7a which comprises a plurality of pressure sensors 7h as components of a plurality of teeth 7g intended to come into contact with the subject's hair and scalp during use. When the teeth 7g come into contact with the subject's scalp, the pressure sensors 7h detect the pressure due to this contact, for example, by a deformation of the teeth 7g, and transmit or modify a signal as part of operational communication with a microcontroller unit (MCU) 7b to detect the contact of the teeth 7g with the scalp.Any suitable pressure or force sensor can be implemented in embodiments including, but not necessarily limited to: a pneumatic load cell, a hydraulic load cell, a piezoelectric crystal load cell, an inductive load cell, a capacitive load cell, a magnetostrictive load cell, a strain gauge load cell, or any combination thereof. In this way, the device can be configured to detect contact with the individual's scalp.

[0075] In the embodiments shown and other examples of embodiments, in the absence of contact detection by pressure sensors 7h, the device is configured for a fiber heating process (for example, by using a Coanda effect to generate an airflow to melt the sebum and guide the hair fibers), which may have minimum and maximum temperature thresholds adapted to heating and reducing the viscosity of the sebum at a greater distance from the scalp, for example, by generating a lower temperature or a more heated airflow at the point of contact. When contact is detected by pressure sensors 7h, the device is configured for a scalp heating process, which may have higher temperature thresholds than those of the fiber heating process, due to a greater The amount of sebum on the scalp. The transition between scalp and fiber heating modes can be achieved by implementing a valve 7d, which is functionally connected to the MCU unit 7b. This unit is, in turn, functionally connected to pressure sensors 7h for conditional actuation of the valve 7d. Additionally, a motor and fan assembly 7c can be implemented to generate a flow of heated air, which can be regulated, for example, by the valve 7d.Valve 7d can be opened further in the absence of contact detection by pressure sensors 7h (i.e., for a hair / fiber heating mode and a lower operating temperature range) so that the temperature of the heated airflow decreases, and can be closed further in the event of contact detection by pressure sensors 7h (i.e., for a scalp heating mode and a higher operating temperature range) so that the temperature of the heated airflow increases.

[0076] As shown in [Fig. 100], an example of a method 28 for controlling a heating mode of a sebum removal device includes several steps that can be performed, in whole or in part, and in any order, whether in parallel or sequentially, by a device control circuitry. In a first step 28a, the device is activated. A reading from the pressure sensor can be received by the control circuitry, which executes one or more logic steps to determine whether the device's pressure sensors are in contact with the scalp in step 28b. If the device is touching the scalp (step 28b: YES), then the control circuitry can heat the airflow according to a scalp heating mode in step 28d. If the device is not touching the scalp (step 28b: NO), then the control circuitry can heat the airflow according to a fiber heating mode in step 28c.In some embodiments, the pressure sensors may remain passive or inactive until they come into contact with a surface such as the scalp, after which they transmit a signal to the control circuitry, which is processed by the control circuitry as an indication of scalp contact. In other embodiments, the pressure sensors may maintain a signal to the control circuitry that is interrupted by contact of the pressure sensors with a surface such as the scalp, after which the signal is not transmitted to the control circuitry, and the absence of a signal is processed by the control circuitry as an indication of scalp contact.

[0077] Although the embodiment shown uses dynamic regulation of the heated airflow temperature to ensure the safety and effectiveness of the device at different distances from the scalp, in other embodiments the temperature of the heated airflow may be constant or within a range of fixed temperature. For example, the heated airflow can be maintained within a temperature range suitable for a scalp heating process or, alternatively, for a fiber heating process, or both. In these and other embodiments, the pressure sensors and dynamic temperature control may be optional and, in at least some embodiments, may be omitted from the device.

[0078] As shown in [Fig. 1OC], an example of a method 27 for maintaining an operating temperature of a heated airflow from a sebum removal device includes several steps that can be carried out, in whole or in part, and in any order, whether in parallel or sequentially, by a control circuit of the device. For example, an airflow can be generated 27a and heated 27b at the same time. However, a step that depends on the result of a previous step can be carried out subsequently depending on this condition; for example, the airflow must be cooled 27f only if the temperature of the heated airflow is not below a maximum threshold (step 27e: NO).

[0079] Considering the overall process of method 27, an airflow is generated 27a, for example, by the activation or continuous activation of a motor and fan of the device. As a second step of method 27, the airflow is heated 27b, for example, by the activation or continuous activation of a heating element of the device. The temperature of the heated airflow is measured 27c, for example, by a thermal sensor or thermometer positioned within the heated airflow, which is functionally connected to the control circuitry of the device. The temperature readings from the thermal sensor are received by the control circuitry, which executes one or more logic steps to determine whether a measured temperature is above a minimum threshold (step 27d).If the measured temperature is not above the minimum threshold (step 27d: NO), then the control proceeds to step 27b to further heat the heated airflow. If the measured temperature is above the minimum threshold (step 27d: YES), then the control proceeds to step 27e, where the control circuitry executes one or more logic steps to determine if the measured temperature is below a maximum threshold. If the measured temperature is not below the maximum threshold (step 27e: NO), then the control proceeds to step 27f where the heated airflow is cooled, for example, by activating a valve to restrict the heated airflow or by restricting the exposure of the heated airflow to a heating element or, alternatively, by adjusting the voltage applied to the heating element to reduce the heat emitted by the heating element. After step 27f, the control proceeds to step 27c, where the temperature of the heated airflow is measured.If the measured temperature is below the maximum threshold (step . 27e: YES), then the command proceeds to step 27c, where the temperature of the heated airflow is measured.

[0080] Regarding the temperature ranges of the heated airflow suitable for softening sebum without damaging hair fibers, it has been found that a minimum temperature of approximately 40°C may be appropriate for heating and reducing the viscosity of sebum, and that a maximum temperature of approximately 216°C is appropriate for avoiding damage to hair fibers. Since sebum softening occurs at temperatures well below 216°C, a lower maximum temperature can be used, in some embodiments, to achieve a gentler but effective heating process. Tests at temperatures below 40°C have also shown an effect on sebum viscosity, with a decrease in sebum viscosity of approximately 40 to 50% occurring at approximately 29°C, for example.

[0081] As used herein, "approximately" a quantity means the exact quantity specified as well as all quantities that fall within the range defined by 10% below the specified quantity and 10% above the specified quantity, inclusive.

[0082] Consequently, in certain embodiments, the minimum temperature threshold for the heated airflow can be approximately 25°C, approximately 26°C, approximately 27°C, approximately 28°C, approximately 29°C, approximately 30°C, approximately 31°C, approximately 32°C, approximately 33°C, approximately 34°C, approximately 35°C, approximately 36°C approximately 37°C, approximately 38°C, approximately 39°C, approximately 40°C, approximately 41°C of approximately 42°C, approximately 43°C, approximately 44°C, approximately 45°C, approximately 46°C, of approximately 47°C, approximately 48°C, approximately 49°C, approximately 50°C, approximately 51°C, of approximately 52°C, approximately 53°C, approximately 54°C, approximately 55°C, approximately 56°C, of about 57°C, about 58°C, about 59°C, about 60°C, or a higher temperature, in order to ensure the reduction of sebum viscosity.

[0083] In embodiments, the maximum temperature threshold may be about 216 °C, about 200 °C, about 190 °C, about 180 °C, about 170 °C, about 160 °C, about 150 °C, about 140 °C, about 130 °C, about 120 °C, about 110 °C, about 100 °C, about 95 °C, about 90 °C, about 85 °C, about 80 °C, about 75 °C, about 70 °C, or a lower temperature.

[0084] In cases where a minimum temperature threshold is applied, the heated airflow may need to come into contact with the sebum for a specific period to reduce the sebum's viscosity and be effective. Thus, in some embodiments, the heated airflow can effectively reduce the sebum's viscosity after contact with the sebum for approximately 1 s, approximately 2 s, approximately 3 s, approximately 4 s, approximately 5 s, approximately 6 s, approximately 7 s, approximately 8 s, approximately 9 s, about 10 s, about They, about 12 s, about 13 s, about 14 s, about 15 s, about 16 s, about 17 s, about 18 s, about 19 s, about 20 s, about 21 s, about 22 s, about 23 s, about 24 s, about 25 s, about 26 s, about 27 s, about 28 s, about 29 s, about 30 s, about 35 s, about 40 s, about 45 s, about 50 s, about 55 s, about 60 s, about 70 s, about 80 s, about 90 s, approximately 100 s, approximately 110 s, approximately 120 s, approximately 130 s, approximately 140 s, approximately 150 s, approximately 160 s, approximately 170 s, approximately 180 s, approximately 210 s, approximately 240 s, approximately 270 s, approximately 300 s, approximately 330 s, approximately 360 s, approximately 390 s, approximately 420 s, approximately 480 s, approximately 540 s, approximately 600 s, or a longer duration, to ensure that the viscosity of the sebum decreases.

[0085] In some embodiments, a lower temperature may require a longer contact time to be effective, and a higher temperature may not require a longer contact time to be effective. Identifying effective contact time / heated airflow temperature combinations that are acceptable to users can be achieved through experimentation with different hair types and sizes under various conditions. Automated or semi-automated programs for specific uses or applications, for example, sebum removal programs whose parameters, including time and temperature, are dependent on hair type or size, can be implemented with programmable device control circuitry and optionally be user-selectable.

[0086] Accordingly, in certain aspects, the disclosure proposes an absorbent substrate article that can be used with a "smart" waterless sebum removal device comprising circuitry configured to perform all or part of a process, including, but not necessarily limited to, regulating the temperature of the heated airflow, detecting a force indicative of contact with the scalp, and the like. In some embodiments, the circuitry of a device is configurable with a processor and processor-executable instructions stored on a non-transient machine-readable medium of the device. In other embodiments, a device includes a software application configured to perform all or part of one or more of the disclosure's processes, in any order or combination.However, in some embodiments, a device includes dedicated hardware circuitry. Additional circuitry configuration of the device may include wireless communication or networking circuitry, for example, circuitry configured for a wireless connection, such as a Bluetooth® connection, a Bluetooth® Low Energy (BLE) connection, and / or a Wi-Fi® connection, and / or a wired connection. The networking circuitry, in combination with other circuitry of the computing device, may be... used to request, retrieve, and / or receive data from a computing device or remote server, for example. In some embodiments, the device can be operated using a computing device, such as a smartphone or personal computing device, which can be operated by a user via a graphical user interface, as known in the art. In some embodiments, the circuitry can include an operational connection of one or more sensors with the processor, or other circuitry, to execute logical operations and / or processes based on data received from one or more sensors, for example, pressure sensors, temperature sensors, and the like.

[0087] Any suitable form factor can be implemented for a sebum removal device, including form factors that emit a stream of heated air from one or more air vents, which passes along one or more curved portions of the device to modify the trajectory of the heated airflow due to the Coanda effect. The slope of one or more curved portions can be adjusted or optimized, experimentally, to achieve the desired effect of hair fiber adhesion to one or more curved portions and to form a focal line at which the heated airflow is concentrated. In this way, the heated airflow is concentrated at the focal line and comes into contact with the sebum, heating, softening, and removing it without causing heat-related damage to the hair or scalp.

[0088] Although the Coanda effect is implemented in many embodiments of the device, in at least some embodiments, a waterless sebum removal device can be operational without necessarily resorting to the Coanda effect. For example, another waterless sebum removal device can implement a number of hair-pressing approaches that may include a hair-combing or clamping structure to ensure the physical separation of sebum and hair. These and other implementations can deliver heat to the hair using a heated airflow that is not necessarily altered by the Coanda effect or, alternatively, can deliver heat to the hair by conduction, due to direct contact of the hair with a heated hair-combing or clamping structure.These and similar approaches can heat the hair and soften the sebum so that the sebum has a reduced viscosity and is easily removed from the hair and scalp, whether by the force of the heated airflow, combing the hair, or the attachment structure, or a non-woven substrate.

[0089] In at least some embodiments in which the Coanda effect is implemented, the selection of the slope of the device, as illustrated by way of example in [Fig. 9A], can be informed by experiments with different slopes, as illustrated by way of example in Figures 9B, 9C, 9D, and 9E. For example, in [Fig. 9A], a plurality of slopes 21 can be tested. A steep slope 21a can be compared to a gentle slope 21b. In the embodiment shown, the steep slope 21a can be characterized at least in part by the amount of rise (i.e., 50 units) divided by the amount of run (i.e., 15 units; or half of 30 units). Similarly, the gentle slope 21b can be characterized at least in part by the amount of rise (i.e., 50 units) divided by the amount of run (i.e., 10 units; or half of 20 units). Thus, in the illustrated embodiment, the slopes of the curved portions of the steep slope 21a are equal to 50 units / 15 units = 3.33, and the slopes of the curved portions of the gentle slope 21b are equal to 50 units / 10 units = 5.00.Although curved sections with a continuous slope are shown in these examples, curved sections with a discontinuous slope may be implemented, without departing from the scope and spirit of the disclosure, for example, to modify or improve the aerodynamic properties of the device. As will be understood by those skilled in the art, different dimensions (including, but not limited to, the amount of climb and the amount of travel) will result in different Coandà effects.

[0090] As shown in [Fig. 9B], curved portions 21a, 21b with different slopes can introduce different free spaces between the hair and the wall of the curved portions. Furthermore, since different hair types have different strengths and flexibilities, this effect can be exploited to configure specific designs for particular hair types. For example, one or more designs including one or more curved portions with different slopes can be implemented for one or more hair types, including, but not limited to, straight hair, wavy hair, curly hair, and very tight curls.Similarly, one or more curved sections with varying slopes can be implemented for one or more hair thicknesses, including, but not limited to, fine hair (e.g., strands less than 0.05 mm thick), medium hair (e.g., strands greater than 0.05 mm and less than 0.08 mm thick), and thick hair (e.g., strands greater than 0.08 mm thick). Other hair properties can contribute to its flexibility and ability to adhere to the curved sections, such as suppleness or stiffness, which can be influenced by the presence of products in the hair, as well as the density and electrostatic characteristics of the strands, such as the tendency to accumulate an electrostatic charge, and similar factors.These and other hair characteristics may be taken into account when testing or selecting one or more device features, including, without. However, to limit ourselves to this, the slope values ​​for the curved portions 21a, 21b, in order to facilitate the adhesion of the hair to the curved portions using the Coanda effect without interfering with the positioning of the device head between the strands of hair for use.

[0091] As shown in [Fig. 9C], examples of curved portions 23 having certain radii or slope dimensions X can be tested to evaluate the deformation of hair strands due to the Coanda effect and the resulting adhesion of the hair strands to the walls of the curved portions. For example, different curved portions 23a, 23b having different radii or slope properties (X=10, X=8) can be evaluated with images captured during use, with and without airflow. Another experimental setup 24 is shown in [Fig. 9D], by which it is possible to determine the force with which the Coanda effect attracts or creates additional tension, and horizontally displaces, one or more hair strands 24d. For example, a hair strand 24d can be attached to a tensiometer 24c, which is attached to a support beam 24b supported by a surface 24a, such as a tabletop.The experimental curved portions 24e can be placed adjacent to the hair strand 24d, and an airflow F applied to the setup, for example, from above. A horizontal force Fn, resulting from the Coanda effect, displaces the hair strand 24d horizontally towards the experimental curved portions 24e, and the distance of the displacement can be measured using a ruler or other distance indicator. When the airflow F is applied, the tension force applied to the hair strand 24d can be measured with the tension meter 24c. As shown in [Fig. 9E], the periodic application of the airflow over time results in corresponding measurements from the tension meter, with a maximum force Fmax of 0.14 N.Thus, the airflow velocity F, the dimensions of the curved portions of the device, or both, can be developed and configured for use with one or more specific hair sizes or types to avoid breaking the hair strands during use. An additional variable that can be included in this and other experiments is the temperature of the heated airflow, which can potentially impact the resistance of the strands and the ease with which they are moved due to the Coanda effect during use.

[0092] During testing of various designs, it was found that a steeper slope of the curved portions introduces greater horizontal displacement and curvature of the hair, and that a gentler slope of the curved portions introduces less horizontal displacement and curvature of the hair. However, since a significantly steeper slope can be more difficult to insert between the strands of hair during use, a balanced or moderate slope is preferable. intermediate can be implemented in embodiments to facilitate the insertion of curved portions into the hair while also maintaining a horizontal movement and curvature of the hair satisfactory for the removal of sebum.

[0093] Experiments conducted under different sebum removal conditions provided comparative information on sample parameters for sebum removal devices and methods, according to various aspects of disclosure. For example, an in vitro oil removal test using the weight of a strand of hair as the measurement reading revealed that heated substrates and wet and heated substrates were more effective for sebum removal than dry, unheated substrates ([Fig. 8C], Table 1). A test applying a heated airflow, heated to temperatures below 40°C, below 45°C, or below 50°C for 5 minutes, revealed that a minimum temperature threshold of approximately 40°C may be suitable for sebum removal ([Fig. 8D]).Furthermore, an in vitro migration distance test evaluating the movement of oils along a surface following the application of a heated or unheated airflow for extended periods revealed that the heated airflow (35 °C) displaced the oils along the surface a much greater distance than the unheated airflow (5 °C) ([Fig. 8E]), consistent with the greater ability of the heated airflow to reduce sebum viscosity. This association was also observed in a removal efficiency test ([Fig. 8F]). A high-friction test, in which nonwoven substrates were in contact with hair samples for varying durations, revealed that sebum was transferred from the hair sample to the substrates over time, with decreasing efficiencies observed in the range of approximately 2 min to 5 min of contact time.

[0094] After identifying effective parameter sets for sebum removal, a prototype device design was developed. A bottom view of an example of a sebum removal device for a subject is shown in [Fig. 0A]; in the orientation shown, the air vents 8f and 8e face the observer, so that a heated airflow passing through the air vents 8f and 8e would move in the general direction towards the observer. A device 8 includes a head 8g attached to a handle 8h. An air duct within the handle 8h is fluidly connected to an air duct within the head 8g. When an airflow moves through the air duct in the handle 8h, it can pass through the air duct in the head 8g and exit through the air vents 8f and 8e.When the airflow exits the air vents 8f and 8e, it comes into contact with the curved portions 8d and 8c of the head and adheres to them according to a Coanda effect formed by the curved portions 8d and 8c of the head. In the illustrated embodiment, the curved portions 8d and 8c. The head converges towards an edge 8b which extends along a length of the head 8g. The curved portions 8d and 8c of the head may include solid surfaces for the adhesion of a substrate 8j to them, as shown in [Fig. 6B]. The device 8 can be supplied or configured for use with any of a number of substrates 8i for sebum removal. As shown in [Fig. 6C], with the substrate attached to an example device 9, the heated airflow including 9b and 9c moves from the head 9a of the device 9 along the curved portions of the device 9, with the substrate on it, and comes into contact with the hair and scalp of a subject 9d for waterless sebum removal. When the substrate comes into contact with the scalp and the heated airflow warms and softens the sebum, the latter can be more easily wiped away, absorbed or otherwise transferred from the scalp to the substrate.In this way, sebum can be effectively removed from the subject 9d without the use of water, detergents or soap, or bathing.

[0095] Various aspects of disclosure can provide a variety of benefits. For example, in [Fig. 6D], an illustration 10 shows a subject before 10a and after 10b the use of a disclosure sebum removal device. Due to the removal of sebum, the subject's hair may have more volume and be lighter because of the reduction in mass resulting from the sebum removal. For example, the subject's hair may have more bounce or volume. These and other disclosure results can correspond to high levels of consumer satisfaction and a high probability of reuse and water conservation.

[0096] Considering the characteristics of an example of a device kit 11, as shown in [Fig. 7A], the device kit 11 may include a device linked with curved portions configured to receive a substrate 11b on them. In some embodiments, the substrate 11b is one of a plurality of substrates 11c, containing identical, similar, dissimilar, or different characteristics among the substrates of the plurality of substrates 11. For example, as they are used, the substrates 11 may become soiled and be replaced with new substrates. Another example of a device kit 12 is shown in [Fig. 7B] and includes a device 12a and a scented component 12b, which may include an independent fragrance or pre-scented substrates, for example.The use of a scented substrate with device 12a can result in the transfer of the fragrance from the substrate to the subject's hair or scalp, providing a fragrant aesthetic touch. While scented substrates may be supplied with a fragrance composition infused into the substrate, this is only one example of an infused substrate; another example includes a substrate infused with a sebum-dissolving composition. Examples of sebum-dissolving compositions may include, for example, a retinoid, an exfoliant such as salicylic acid or glycolic acid, an oil, a diluent, a vector, a salt, a buffer component for pH control, or any combination thereof.

[0097] In various embodiments, a composition may be infused into an absorbent substrate article, and the infused article dried or dehydrated, for example, for packaging or offering for sale, and supplied to a user in a dry state. The user may then re-moisten the infused substrate before use, so that the components of the composition are solubilized and active in the water. However, in other embodiments, an article may be supplied to a user in a dry state, optionally in combination with a composition, which the user may then infuse into the substrate before using the substrate.As will be understood by those skilled in the art, these and other relatively minor uses of water with aspects of disclosure do not call into question the use of the expression "water-free" as used here, which generally refers to aspects that can be implemented without a significant or substantial amount of water, as is otherwise customary in processes with soap or detergent baths.

[0098] A perspective view of an example of a waterless sebum removal device is shown in [Fig. 7C], with other configurations and views of the example device shown in Figures 7D, 7E, 7F, and 7G. In the illustrated embodiment, a waterless sebum removal device 13 for a subject includes a handle 13a and a head 13b which includes a substrate base 13c and a substrate base attachment element 13b for attaching a substrate to the substrate base 13c. In the illustrated embodiment, the substrate base 13c also has curved portions designed to produce a Coanda effect on an airflow, such that the airflow is shaped into an arc by the Coanda effect and bends the hair towards the curved portions during use.In some embodiments, the handle 13a includes a dorsal part 13g, a ventral part 13h, a left part 13i and a right part 13j which together form a housing for the handle which includes an air duct 13d inside. In some embodiments, the air duct 13d of the handle is fluidly connected to an air duct 13n of the head, as shown in [Fig.7E], so that air flows from the air duct 13d of the handle into the air duct 13n of the head and exits through air vents 13k of the head, where the airflow comes into contact with curved portions 13m of the substrate base to generate the Coanda effect. As shown in [Fig.7D], in some embodiments, the substrate base 13c is detachable from the head 13b of the device 13 by bending and retraction of the substrate base 13c from the substrate base fixing element 131.This configuration can be used to clean or repair device 13, extract a used substrate from substrate base 13c or attach a new one. substrate to substrate base 13c, for example. A nonwoven substrate may be attached to substrate base 13c by any suitable means, including, but not limited to, an adhesive backing, an adhesive substance, a button, a clasp, a snap / clip closure, hook and loop tape, a zipper, a magnet, and any combination thereof. In at least some embodiments, the substrate may be attached to substrate base 13c, at least partially, by pressure or friction adjustment due to the attachment of the substrate base fastener 131 to substrate base 13c; in such embodiments, the substrate may be fixed between the substrate base fastener 131 and substrate base 13c and held in place by these elements. However, other mechanisms for attaching the substrate to substrate base 13c may be implemented without departing from the scope and spirit of this disclosure.

[0099] As shown in [Fig. 7G], in at least some embodiments, a substrate base 13c comprises a plurality of channels 13p, formed by a plurality of edges 13o, configured to guide an airflow (curved arrows) over curved portions of the substrate base 13c and through the channels 13p. The configuration shown forms a comb for the device, configured to make contact with the scalp for the removal of sebum from the subject. In this embodiment and other embodiments in which a nonwoven substrate is attached to the substrate base 13c, the curvature of the airflow around the substrate, which follows the shape of the curved portions of the substrate base 13c, bends the subject's hair and increases the contact of the hair and scalp with the substrate. This helps to absorb sebum and oil from the hair and scalp for waterless cleansing.

[0100] In various aspects, the disclosure proposes waterless sebum removal processes that rely at least in part on heating the sebum with a stream of heated air to reduce the viscosity of the sebum and remove the sebum from the hair. In various aspects, a process can be performed by a user, or by instructing a user to perform the process (for example, by providing the user with instructions to guide them in using a device, performing a process, or the like).

[0101] Sebum removal can be facilitated by the use of a substrate, which may or may not be heated, and which may be dry or moist. As shown in [Fig. 1OA], a waterless sebum removal process 26a includes, in step 26b, generating a heated airflow configured to soften the sebum; in step 26c, bringing the hair and / or scalp into contact with the heated airflow; in step 26d, providing a substrate to capture the sebum; in step 26e (optional), heating the substrate; and in step 26f, bringing the hair and / or scalp into contact with the substrate or the heated substrate, as appropriate. As shown in [Fig. 1OB], a waterless sebum removal process 26g with concrete application The Coanda effect includes, in step 26h, the generation of a heated airflow with a Coanda effect that is configured to soften sebum; in step 26i, contacting the hair and / or scalp with the heated airflow having the Coanda effect; in step 26j, providing a substrate configured to capture sebum; in step 26k (optional), heating the substrate; and in step 261, contacting the hair and / or scalp with the substrate or the heated substrate, as appropriate. PAINTINGS

[0102] [Table 1]

[0103] Table 1. Test data concerning the removal of oil from a strand of hair in vitro using a water-free device (see also [Fig.8C]). Sebum Removal Stage Description Hair Strand Weight (g) N / A Original Hair Strand Weight 8.45 N / A Hair Strand with Oil 8.75 1 Cold Airflow with Dry Substrate 8.68 2 Heated Airflow with Dry Substrate 8.53 3 Heated Airflow with Wet Substrate 8.49 NON-EXHAUSTIVE METHODS

[0104] Although general features of the disclosure are described and shown, and specific features of the disclosure are presented in the claims, the following non-limiting embodiments relate to features, and combinations of features, that are explicitly contemplated as forming part of the disclosure. The following non-limiting embodiments contain elements that are modular and can be combined with each other in any number, order, or combination to form a new non-limiting embodiment, which can itself be further combined with other non-limiting embodiments.

[0105] Embodiment 1. Absorbent substrate article, comprising: a hair contact layer including a lower portion for contact with the hair of a subject; a dry shampoo layer attached to an upper portion of the hair contact layer and a deformable layer attached to a upper portion of the dry shampoo layer; wherein contact of the lower part of the hair contact layer with the subject's hair facilitates the removal of sebum from the subject's hair by the dry shampoo layer without direct contact of the dry shampoo layer with the subject's hair.

[0106] Embodiment 2. Absorbent substrate article of embodiment 1 or any other embodiment, wherein the hair contact layer comprises a non-woven material.

[0107] Embodiment 3. Absorbent substrate article according to any one of embodiments 1-2 or any other embodiment, wherein the hair contact layer is configured to absorb sebum from the subject's hair.

[0108] Embodiment 4. Absorbent substrate article according to any one of embodiments 1 to 3 or any other embodiment, wherein the dry shampoo layer comprises a dry shampoo powder composition configured to absorb sebum from the hair of the subject of the hair contact layer.

[0109] Embodiment 5. Absorbent substrate article according to any one of embodiments 1 to 4 or any other embodiment, wherein the contact of the hair contact layer with the scalp of the subject can deform the deformable layer and the absorbent substrate article on the basis of the curvature of the scalp of the subject.

[0110] Embodiment 6. Absorbent substrate article according to any one of embodiments 1 to 5 or any other embodiment, wherein the deformable layer comprises a spongy material, a hydrogel material, an elastic material, a thermally conductive material or any combination thereof.

[0111] Embodiment 7. Absorbent substrate article according to any one of embodiments 1 to 6 or any other embodiment, comprising a perfume infused in the hair contact layer, the dry shampoo layer, the deformable layer or any combination thereof.

[0112] Embodiment 8. Absorbent substrate article according to any one of embodiments 1 to 7 or any other embodiment, comprising an adhesive fixed to an upper portion of the deformable layer to fix the absorbent substrate article to a surface.

[0113] Embodiment 9. Absorbent substrate article according to any one of embodiments 1 to 8 or any other embodiment, wherein the surface is a curved portion of a head of a device for the waterless removal of sebum from the subject.

[0114] Embodiment 10. Absorbent substrate article according to any one of embodiments 1 to 9 or any other embodiment, wherein the dry shampoo layer comprises a dry shampoo powder composition comprising dry shampoo powder particles having average particle sizes that are substantially larger than the average pore sizes of the hair contact layer to separate the dry shampoo powder particles from the subject's hair and prevent contact of the dry shampoo powder particles with the subject's hair.

[0115] Embodiment 11. Absorbent substrate article according to any one of embodiments 1 to 10 or any other embodiment, in which the absorbent substrate article is formed by a process which includes: assembling a dry shampoo composition of the dry shampoo layer on the deformable layer and bringing the dry shampoo composition into contact with a non-woven material of the hair contact layer to compress and compact the dry shampoo composition to form the dry shampoo layer sandwiched between the deformable layer and the hair contact layer.

[0116] Embodiment 12. A device for the waterless removal of sebum from a subject, the device comprising: a head including an air duct and a vent fluidly connected to the air duct of the head; and the absorbent substrate article of one of embodiments 1 to 11 or any other embodiment, configured to be positioned on the head of the device; wherein the air duct and the air vent of the head are configured for the passage of a heated airflow through them, and wherein the heated airflow is configured to come into contact with, heat and soften the sebum on the subject in order to facilitate the removal of the sebum from the subject by the absorbent substrate article.

[0117] Embodiment 13. Device according to embodiment 12 or any other embodiment, wherein the absorbent substrate can be removably fixed with curved portions of the head to come into contact with the hair displaced by a Coanda effect formed by the device and absorb the sebum from the hair during use.

[0118] Embodiment 14. Device according to any one of embodiments 12 and 13 or according to any other embodiment, wherein the shapes of the heated airflow are modified and change from linear airflow shapes to curved airflow shapes based on a Coanda effect formed by the device, so that the curved airflow shapes approach the shapes of the curved portions of the head of the device.

[0119] Embodiment 15. Necessary for the waterless removal of sebum from a subject, the necessary comprising the absorbent substrate article of any one of embodiments 1 to 11 or of any other embodiment, the device of any one of embodiments 12 to 14 or of any other embodiment, or both; and instructional material to train a user in the use of the necessary equipment for the removal of sebum from the subject.

[0120] Although illustrative embodiments have been shown and described, it will be appreciated that various changes may be made to them without departing from the spirit and scope of the invention.

Claims

Demands

1. Absorbent substrate article (1), comprising: a hair contact layer (la), including a lower portion (Id) in contact with the hair of a subject; a dry shampoo layer (1b) attached to an upper portion (le) of the hair contact layer (la); and a deformable layer (le) attached to an upper portion (If) of the dry shampoo layer; wherein the contact of the lower portion (Id) of the hair contact layer facilitates the removal of sebum from the subject's hair by the dry shampoo layer (1b) without direct contact of the dry shampoo layer with the subject's hair.

2. Absorbent substrate article according to claim 1, wherein the contact layer (la) comprises a non-woven material.

3. Absorbent substrate article according to any one of claims 1 and 2, wherein the dry shampoo layer (1b) comprises a dry shampoo powder composition configured to absorb sebum from the hair of the subject of the hair contact layer.

4. Absorbent substrate article according to any one of claims 1 to 3, wherein contact of the contact layer (la) with the scalp of the subject can deform the deformable layer (le) and the absorbent substrate article (1) on the basis of the curvature of the scalp of the subject.

5. Absorbent substrate article according to any one of claims 1 to 4, wherein the deformable layer (the) comprises a spongy material, a hydrogel material, an elastic material, a thermally conductive material, or any combination thereof.

6. An absorbent substrate article according to any one of claims 1 to 5, wherein the dry shampoo layer (1b) comprises a dry shampoo powder composition including dry shampoo powder particles having average particle sizes that are substantially larger than the average pore sizes of the hair contact layer for separating the dry shampoo powder particles from the hair of the subject and prevent contact of dry shampoo powder particles with the subject's hair.

7. Absorbent substrate article according to any one of claims 1 to 6, wherein the absorbent substrate article is formed by a process comprising: assembling a dry shampoo composition of the dry shampoo layer (1b) onto the deformable layer (1e); and bringing the dry shampoo composition into contact with a non-woven material of the contact layer (1a) to compress and compact the dry shampoo composition to form the dry shampoo layer sandwiched between the deformable layer and the hair contact layer.

8. A device for the waterless removal of sebum from a subject, the device comprising: a head (7a) comprising an air duct (6g) inside and an air vent fluidly connected to the air duct of the head and the absorbent substrate article (1) according to any one of claims 1 to 7, configured to be positioned on the head of the device; wherein the air duct and the air vent of the head are configured for the passage of a heated airflow through them, and wherein the heated airflow is configured to come into contact with the sebum on the subject, heat it and soften it to facilitate the removal of the sebum from the subject by the absorbent substrate article.

9. Necessary for the waterless removal of sebum from a subject, the necessary comprising the absorbent substrate article (1) according to any one of claims 1 to 7 or the device according to claim 8 and instructional material for training a user in the use of the necessary for the removal of sebum from the subject.