WO2009038349A2

WO2009038349A2 - Mask pack using the water-vapor controllable sheet

Info

Publication number: WO2009038349A2
Application number: PCT/KR2008/005499
Authority: WO
Inventors: Keum-Duck Hong; Shin-Hee Lee; Hyun-Jung Park; Chang-Rae Lee; Se-Kyoo Jeong; Byeong-Deog Park
Original assignee: Neopharm Co., Ltd.
Priority date: 2007-09-19
Filing date: 2008-09-18
Publication date: 2009-03-26
Also published as: WO2009038349A3

Abstract

There is provided a functional mask pack using a moisture-controllable mask sheet having an effect to promote absorption of an active component in the skin by adjusting directionality with respect to a moisture penetration direction, or showing a skin soothing effect by providing a sense of coldness to the skin. The mask pack comprises a moisture absorbing layer (7) having a relatively lower density and hydrophilicity, a moisture diffusing layer (5) having a relatively higher density and hydrophilicity, and a moisture transfer laye (6) having an intermediate density and hydrophilicity between the moisture absorbing layer and the moisture diffusing layer. Here, the mask sheet is used in the mask pack to promote the absorption of the active component when the mask sheet has a 3-layered structure of the moisture diffusing layer (5), the moisture transfer layer (6) and the moisture absorbing layer (7) which are sequentially stacked from the inside of the mask sheet, and used in the mask pack to soothe the skin when the mask sheet has a 3-layered structure of the moisture absorbing layer (7), the moisture transfer layer (6) and the moisture diffusing layer (5) which are sequentially stacked from the inside of the mask sheet. Therefore, the mask pack according to the present invention may be useful to promote the absorption of the active component and soothe the skin since its particular structure leads to a high moisture mobility, and thus to prevent resource waste and make a contribution to the environmental protections through the re-use of the resources.

Description

[DESCRIPTION] [Invention Title]

MASK PACK USING THE WATER-VAPOR CONTROLLABLE SHEET [Technical Field]

<i> The present invention relates to a mask pack using a moisture controllable sheet, and more particularly, to a mask pack including a mask sheet including a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer, and showing a cosmetic effect and a skin soothing effect, the cosmetic effect being obtained by promoting absorption of an active component such as a cosmetic material or a medicine into the skin since each of the layers shows unidirectional mobility with respect to a moisture penetration direction due to the difference in hydrophilicity and density, and the skin soothing effect being obtained by providing a sense of coldness to irritated skins. [Background Art]

<2> With recent development of medical technologies and bio-technologies, medicines or bioactive substances having a high molecular weight or a high polarity have developed ceaselessly. However, these medicines or bioactive substances have problems in that it is difficult to maintain a constant effective dose of the medicines or bioactive substances in blood in orally administering them, or the medicines or bioactive substances may be easily degraded by enzymes in the gastrointestines. Therefore, there have been ardent attempts to promote bioavailability and a therapeutic effect of medicines, which may be inactivated by the metabolism in the gastrointestines, by using a transdermal administration system in which medicines are delivered into the skin unlike conventional systems such as the oral administration. The transdermal administration has advantages in that it may be used for patients that are difficult to be orally administered, and it is possible to adjust an absorption rate in aspect of formulations. Also, it has advantages in that it has been continuously studied with great interests in the field of cosmetics and skin cares as well as medicines due to the ease of administration, for example easily starting and suspending the administration of medicines and delivering the medicines into the whole body without a pain.

<3> It is difficult to transdermal Iy deliver the medicines due to the barrier of the stratum corneum, and therefore chemical, mechanical and physical delivery promotion systems have been studied in order to solve the above problems.

<4> Among the transdermal delivery promotion systems, there is a chemical method using urea and salicylic acid including: degrading stratum corneum and promote the absorption of medicines by increasing a moisture content in the skin. Urea is commercially available in the form of 10% cream and functions to increase a moisture content in the skin keratin and enhance the transdermal absorption of certain components. In addition, a various kinds of compounds has bee used as the absorption-promoting agent. Among them, alcohols and glycols have been particularly known to promote the transdermal absorption of various medicines, but they are volatile and aromatic. In these years, essential oils having a good absorption in the skin also have attracted public attentions. The essential oils includes Jojoba oil, almond oil, evening primrose oil, camellia oil, olive oil, sunflower oil, avocado oil and castor oil, and are present in flower, fruits, leaves and roots of plants. However, the absorption-promoting agents have problems in that they induce damages to the skin barrier and also react in a concentration- dependent manner, and causes strong stimulus to the skin under a suitable concentration condition to facilitate the permeation into the skin.

<5> In addition to the chemical methods, developments of physical and transdermal delivery promotion systems are also under way with increased interest in effective deliver of active materials. Here, the physical delivery promotion system operates using a direct current, a high-voltage current, a high-frequency current, a magnetic field, ultrasonic waves and lasers, and the transdermal delivery promotion system operates using a mechanical delivery promotion system such as suction, microneedles, skin peeling and skin perforations.

<6> The physical delivery promotion system used to enhance the transdermal administration of medicines includes technologies using iontoporesis, sonophoresis, electroporation, heat and high-frequency energy, all of which have been recently introduced in the filed of the delivery promotion systems. The iontoporesis is achieved by allowing (+) electrical current to flow from an electrode to positively charged medicines in a solution in order to diffuse the positively charged medicines into the skin tissue by means of a repulsive electrical force, and allowing (-) electrical current to flow in negatively charged medicines in the same manner. The sonophoresis is a technology of delivering medicines into the skin by generating micropores in a surface of the skin using an acoustic energy generated by the ultrasonic waves. And the electroporation is a method of instantly and repeatedly applying an electrical current with high voltage to living skin cells to form reversible micropores, and thus enabling the permeation of medicines.

<7> However, the iontoporesis has problems in that it requires an electrolyte solution to facilitate the flow of electrical current in addition to the effective medicines, and the non-ionized or weakly ionic effective medicines are not delivered to a sufficient level since they have low absorptance and absorption rate in the skin due to the low efficiency in use of electrical current. Also, components, concentration and pH of a gel for the iontoporesis, electrical current and procedure time should be pre-set to obtain a sufficient delivery promotion effect, and therefore the above- mentioned conditions should be considered in the manufacture of the mask pack. Furthermore, a very high direct current should be used to allow medicines to permeate a barrier of the skin stratum corneum. The direct current causes rubefaction and burns and other side effects such as damages to cell membranes by an electrochemical reaction with tissues since charges of the direct current flow only in one direction.

<8> With the advent of a well-being era, interests and demands for health and skin cares tends to increase without distinction of age or sex. It is most important for the skin cares to penetrate an efficacious material into the skin so deeply and much that it can take effect on the skin cares. However, the above-mentioned physical and chemical transdermal delivery promotion systems require a method of enhancing a permeation rate of the active materials without a stimulus since they give continuous stimuli and damages to the skin.

<9> Meanwhile, skin moisturizing technologies have been used to protect healthy skins from a variety of skin stresses, including: protecting drying of moisture from the skin and improving a moisturizing effect in the stratum corneum. A moisturizer for absorbing moisture or a wetting agent for preventing evaporation of moisture have been ultimately used to enhance the maintenance of moisture in the stratum corneum. Also, it has been proposed that the differentiation of the stratum corneum is an important way to prevent the drying of moisture from the skin, and therefore a keratin care technology of promoting a normal turnover of the stratum corneum has also developed. In order to meet consumer' s demands with the diversities of a recent society, active developments of functional cosmetics having high physiological activities are also under way to prevent the damages of the skin by ultraviolet rays or remove toxic active oxygen from the skin. <io> In particular, accelerated aging of the skin, skin troubles, overdryness of the skin, atopy and skin hypersensitivity are caused by the exposure to environments that are harmful to the skin, and there have been skin troubles caused by the stress. Particularly in the case of the skin troubles such as skin dryness and atopy, appearance of the skin is not good, and skin treatments such as chemical or physical peelings and lasers skin cares give a stimulus to the skin and make the skin sensitive to the stimulus, and therefore it is necessary to protect the skin from the external exposure. Therefore, in order for an active component to show effects such as skin soothing, skin pore diminishing, wrinkle improvement and soothing of skin burns by exposure to the sun, it is necessary to soothe the skin by providing a sense of coldness to the skin in addition to promoting the absorption of the active component into the skin. Conventional poultice or cosmetics that have been used as non-drug products to provide a sense of coldness to the skin include a small amount of menthol, sorbitol, peppermint oil, etc. However, the poultice or cosmetics has an effect to give a feeling of refreshment to the skin, but does not lower a temperature of the skin in fact. Therefore, it has been known that the poultice or cosmetics give a serious stimulus to the skin when they are used in a large amount, which leads to limitation on application to the face.

<π> In order to improve effects of a mask pack, researches on the mask pack have been mainly carried out in the art by changing and adding components in the mask pack, but there is little active research on a base material of the mask sheet. Most of conventional mask packs are disposable products obtained by incorporating cosmetic components into a nonwoven fabric base. However, the disposable mask packs have problems regarding the economical efficiency and environments since they must be discarded after their use.

<i2> Accordingly, the present inventors have ardently attempted to solve the above-mentioned problems, and found that a mask pack that promote permeation of active materials without a stimulus to the skin and shows a skin soothing effect is obtained by changing materials and structure of the mask sheet, and therefore, the present invention was completed on the basis of the above facts.

<13>

[Disclosure] [Technical Problem]

<i4> The present invention is designed to solve the problems of the prior art, and therefore it is an object of the present invention to provide a mask pack using a moisture controllable mask sheet to apply to the skin, wherein the mask sheet has a 3-layered structure of a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer and is directional with respect to a moisture penetration direction. <i5> Also, it is another object of the present invention to provide a mask pack having an effect to promote absorption of active components in the mask pack into the skin by using a mask sheet that has a moisture diffusing layer, a moisture transfer layer and a moisture absorbing layer formed sequentially from the inside thereof, and is formed with such materials and structure that the moisture diffusing layer, the moisture transfer layer and the moisture absorbing layer can be relatively reduced in density and hydrophilicity. <i6> It is still another object of the present invention to provide a mask pack having an effect to provide a sense of coldness to the skin to soothe the skin by using a mask sheet that has a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer formed sequentially from the inside thereof, and is formed with such materials and structure that the moisture absorbing layer, the moisture transfer layer and the moisture diffusing layer can be relatively increased in density and hydrophilicity.

<17>

[Technical Solution]

<i8> According to an aspect of the present invention, there is provided a mask pack including a mask sheet that has a 3-layered structure of a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer and is directional with respect to a moisture penetration direction.

<i9> Also, there is provided a mask pack including a mask sheet that has a moisture diffusing layer, a moisture transfer layer and a moisture absorbing layer formed sequentially from the inside thereof, and is formed with such materials and structure that the moisture diffusing layer, the moisture transfer layer and the moisture absorbing layer can be relatively reduced in density and hydrophilicity. In this case, a skin adhesive layer may be further formed inside the moisture diffusing layer in order to improve adhesion to the skin. Also, the mask pack according to one exemplary embodiment of the present invention may be formed by coating the mask sheet with a cosmetic or medicine composition that contains an active cosmetic component .

<20> Also, there is provided a mask pack including a mask sheet that has a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer formed sequentially from the inside thereof, and is formed with such materials and structure that the moisture absorbing layer, the moisture transfer layer and the moisture diffusing layer can be relatively increased in density and hydrophilicity. In this case, a skin adhesive layer may be further formed inside the moisture absorbing layer in order to improve adhesion to the skin. Also, the mask pack according to one exemplary embodiment of the present invention may be formed by coating the mask sheet with a cosmetic composition that shows a skin soothing effect.

<2i> The mask pack according to one exemplary embodiment of the present invention is characterized in that it has a 3-layered structure of a moisture absorbing layer, a moisture diffusing layer and a moisture transfer layer, wherein the moisture absorbing layer is made of a hydrophobic material having a relatively lower density and hydrophilicity, the moisture diffusing layer is made of a material having a relatively higher density and hydrophilicity, and the moisture transfer layer is made of a material having an intermediate density and hydrophilicity between the moisture absorbing layer and the moisture diffusing layer. Moisture flows from a low-density fiber from to a high-density fiber, and also flows from a hydrophobic fiber having a low moisture content to a hydrophilic fiber having a high moisture content. The more compact the fibers are, the narrower the gaps between the fibers are. Therefore, the moisture moves toward the more compact fibers due to a capillary phenomenon.

<22> The present invention is realized using the mobility of moisture. In this case, the moisture absorbing layer of the mask sheet according to one exemplary embodiment of the present invention may be preferably made of a polyolefin-based fiber such as polyethylene and polypropylene that has a low moisture content, the moisture diffusing layer may be formed of a fiber that has a high moisture content, that is, a modified polyester, polyamide fiber that is hydrophilically improved by a physical or chemical method, or a natural fiver such as cotton, rayon and furs, and the moisture transfer layer O

may be formed of a polyester fiber of a polyester shaped yarn having intermediate hydrophi licity between the moisture absorbing layer and the moisture diffusing layer.

<23> In this case, there is no particular limitation on materials in the mask sheet according to one exemplary embodiment of the present invention when it is possible to ensure the relative difference in hydrophi licity between the layers. This is why the innate hydrophi licity of the fiber may be adjusted by modifying a fiber or a strand.

<24> Also, since moisture flows from a low density to a high density in the mask sheet according to one exemplary embodiment of the present invention, the moisture transfer layer and the moisture diffusing layer may have a 1.2 to 4 times higher density (a strand number of fibers per unit area) than the moisture absorbing layer and the moisture transfer layer, respectively. When the density of the moisture transfer layer and the moisture diffusing layer is 1.2 times less, or 4 times greater than the moisture absorbing layer and the moisture transfer layer, it is difficult to manufacture a mask pack. It is also possible to increase the density of fibers by making thin strands or twisting threads. Also, the movement of moisture may be promoted by a capillary phenomenon when shaped yarns are used to weave a fiver.

<25> The moisture is absorbed into the moisture absorbing layer due to the mobility of the moisture in the mask sheet according to one exemplary embodiment of the present invention, and moves to the moisture diffusing layer via the moisture transfer layer. The mask sheet according to one exemplary embodiment of the present invention may apply to a mask pack having an effect to promote the absorption of an active component into the skin, and to a mask pack having an effect to provide a sense of coldness to the skin in order to soothe the skin by changing a stacked structure of the mask sheet according to one exemplary embodiment of the present invention.

<26> The mask pack for promoting the absorption of the active component in to the skin according to one exemplary embodiment of the present invention include the mask sheet that has a moisture diffusing layer, a moisture transfer layer and a moisture absorbing layer stacked sequentially from the inside thereof, and is formed with such materials and structure that the moisture diffusing layer, the moisture transfer layer and the moisture absorbing layer can be relatively reduced in density and hydrophilicity. Therefore, the moisture moves towards the inside of the mask pack, and the active component in the mask pack moves along with the moisture, which leads to an increased amount of the active component applied to the skin.

<27> The movement of components in the skin is caused by the distribution and diffusion. In this case, since the mask sheet that may promote the movement of components from the outside of the skin in a certain direction also promotes the distribution and diffusion of the active component into the skin, the absorption of the active component into the skin may be more improved by the synergic effect on the promotion of the skin permeation.

<28> The mask pack for soothing the skin according to another exemplary embodiment of the present invention include the mask sheet that has a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer stacked sequentially from the inside thereof, and is formed with such materials and structure that the moisture absorbing layer, the moisture transfer layer and the moisture diffusing layer can be relatively increased in density and hydrophilicity. Therefore, the moisture moves from the inside to the outside of the mask pack, and the moisture is discharged through the moisture diffusing layer.

<29> The mask pack has a skin soothing effect since a sense of coldness is given to the skin with the evaporation of the moisture as described above. Therefore, the mask pack according to one exemplary embodiment of the present invention may show a skin soothing effect due to its own structure even when the mask pack does not include a component that provides a sense of coldness to the skin or shows a skin soothing effect. Of course, when the mask pack according to one exemplary embodiment of the present invention including a component having a skin soothing effect is applied to the skin, the mask pack has a synergic effect to improve a skin soothing effect further. <30> The mask sheet according to one exemplary embodiment of the present invention may have a 3-layered structure. In this case, when the mask sheet has a bi-layered structure, the mask sheet has the unidirectional permeation of moisture, but may be easily dried since the moisture stays at the mask sheet for a very short time. Therefore, the active component may not be sufficiently absorbed into the skin, and the skin soothing effect is given only for a short time.

<3i> A moisture content is referred to as a moisture content of the fiber at standard conditions (20°C, 65%RH). Here, natural fibers such as cotton (8.5 %), rayon (11%) and wool (18.25%) have a high moisture content since they have high hydrophilicity, and polyolefin fibers such as polyethylene (0.0%) and polypropylene (0.0%) have a very low moisture content since they have very low hydrophilicity. Also, synthetic fibers such as polyester (0.4%), acryl (1.5%) and nylon (4.5%) have low moisture content since they have low hydrophilicity. However, the hydrophilicity of the synthetic fibers may be chemically improved by introducing a hydrophilic group into the synthetic fibers in a spinning process, and be physically improved by adjusting a shape of nozzles in a spinning process to manufacture a star-shaped or triangular shaped yarn other than a circular shaped yarn.

<32> Therefore, fibers constituting each layer of the mask sheet according to one exemplary embodiment of the present invention may be used regardless of the kinds of the fibers. Here, the relatively hydrophobic moisture absorbing layer may be formed of a polyolefin-based fiber such as polypropylene and polyethylene that has a moisture content of 1% or less, the relatively hydrophilic moisture diffusing layer may be formed of a modified polyester or polyamide fiber that is hydrophi lically improved by the physical or chemical method, or a natural fiber such as cotton, rayon and wool that has a moisture content of 8% or more, and the moisture transfer layer having intermediate hydrophilicity between the moisture absorbing layer and the moisture diffusing layer may be formed of a polyester fiber or its shaped yarns. [Advantageous Effects]

<33> As described above, the mask pack according to one exemplary embodiment of the present invention may be re-used since the mask sheet is coated with an active cosmetic component, and has effects to show a cosmetic effect and a therapeutic effect since the active component penetrates deeply into the skin due to the effect of a unidirectional Iy permeable sheet on the promotion of permeation of moisture, and also show skin soothing and cooling effects by rapidly evaporating the moisture from the skin. Also, the mask sheet that is directional with respect to a moisture penetration direction according to one exemplary embodiment of the present invention may be used in the field of various applications and apply to the entire body as well as the face since the moisture penetration direction may be easily adjusted by changing a stacked structure of the mask sheet. [Description of Drawings]

<34> FIG. 1 is a plane view showing a mask pack according to one exemplary embodiment of the present invention.

<35> FIG. 2 is partial cross-sectional view showing a mask pack according to one exemplary embodiment of the present invention. Here, FIG. 2 (A) is a partial cross-sectional view showing the mask pack having an effect to promote absorption of an active component into the skin according to one exemplary embodiment of the present invention, FIG. 2 (B) is a partial cross- sectional view showing the mask pack having an effect to soothe the skin according to one exemplary embodiment of the present invention, and FIG. 2 (C) is a partial cross-sectional view showing a hydrogel-type mask pack according to one exemplary embodiment of the present invention.

<36> FIG. 3 is a perspective view showing the use of the mask pack according to one exemplary embodiment of the present invention.

<37> FIG. 4 is a graph illustrating the permeation of an active component into the skin as described in Test examples 1 and 2 and Comparative Test example 1 of the present invention.

<38> FIG. 5 is a graph illustrating the permeation of an active component into the skin as described in Test examples 3 and 4 of the present invention.

<39> FIG. 6 is a graph illustrating cooling effects of mask sheets as described in Test example 5 and Comparative Test example 2 of the present invention and a conventional nonwoven fabric sheet according to the changes in temperature.

<40> FIG. 7 is a graph illustrating skin soothing effects of mask sheets as described in Test example 6 and Comparative Test example 6 of the present invention according to the changes in temperature.

<4i> FIG. 8 is a graph illustrating skin soothing effects of mask packs including cosmetic compositions as described in Examples 2 and 3 of the present invention.

<42> FIG. 9 is an image view showing actual images measured using an IR camera when the mask packs including cosmetic compositions as described in Examples 2 and 3 of the present invention are applied to the face. Here, FIG. 9 (A) shows an actual image measured right after the exercise (before application of a pack), FIG. 9 (B) shows an actual image measured 10 minutes after the application of a pack, FIG. 9 (C) shows an actual image measured 20 minutes after the application of a pack, and FIG. 9 (D) shows an actual image measured 10 minutes after the removal of a pack.

<43> FIG. 10 is a graph illustrating cooling effects of hydrogel-type mask packs as described in Examples 4 and 5 of the present invention according to the changes in temperature when the hydrogel-type mask packs are applied to the face.

<44>

[Best Mode]

<45> Hereinafter, exemplary embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

<46> FIG. 1 shows a mask pack according to one exemplary embodiment of the present invention. Here, the mask pack according to one exemplary embodiment of the present invention is divided into three groups according to the regions of the applied face. One is a mask pack 1 that is applied to the entire face, another is a nose pack 2 that is applied to the nose, and the other is an eye pack 3 is applied to the eye. A mask sheet 10 of the mask pack 1 includes a cut portion 11 and an open portion 12 to easily adhere closely to the curved face. FIG. 3 shows the use of the mask pack according to one exemplary embodiment of the present invention.

<47> FIG. 2 is partial cross-sectional view showing a mask sheet of the mask pack according to one exemplary embodiment of the present invention.

<48> FIG. 2 (A) shows a stacked structure of the mask pack having an effect to promote the absorption of an active component into the skin. A moisture absorbing layer 7, a moisture transfer layer 6 and a moisture diffusing layer 5 are sequentially formed from the outside of the mask sheet.

<49> The moisture absorbing layer 7 is relatively hydrophobic and has a low density, and the moisture diffusing layer 5 is relatively hydrophilic and has a high density. Therefore, the moisture moves spontaneously from the outside to the inside of the mask sheet due to the above structures of the moisture absorbing layer 7 and the moisture diffusing layer 5, which leads to the increase in an amount of the moisture transferred to the skin. Active components such as a skin care component in the mask sheet also moves into the skin along with the moisture as the moisture moves along as described above.

<50> Since the mask sheet that may promote the movement of the active components in a certain direction also promotes the distribution and diffusion of the active components into the skin, the absorption of the active components into the skin may be more improved by the synergic effect on the promotion of the skin permeation.

<5i> In the case of the mask pack having an effect to promote the absorption of the active components, a skin adhesive layer may be further formed inside the moisture diffusing layer in order for the mask sheet to adhere closely to the skin without a loose adhesion of the mask sheet. The skin adhesive layer may be formed of a natural or synthetic adhesive, or hydrogel that has an adhesive property. The formation of the skin adhesive layer allows the mask pack to adhere closely to a user' s skin without a loose adhesion of the mask sheet due to the adhesive property when the mask pack is in contact with the user' s skin and is pressed against the user' s skin.

<52> The mask pack having an effect to promote the absorption of the active components may be produced by coating the moisture absorbing layer with a medicine or cosmetic composition containing an active component. The active component may include at least one raw material selected from the group consisting of raw materials that have an anti-winkle effect, a whitening effect, a moisturizing effect and a skin soothing effect, that is, an effect to provide a feeling of coolness or refreshment to the skin. In this case, the medicine or cosmetic composition is preferably present at a content of 100 to 2000 parts by weight, based on the total weight of the mask sheet. When the content of the medicine or cosmetic composition is within the content range, a sufficient amount of the active component may be transferred to the skin, and it is also possible to get rid of inconveniences, for example streaming down of liquid phase component in the use of the mask pack. The optimum content of the medicine or cosmetic composition may be adjusted to a suitable level according to the hygroscopic property of the mask sheet.

<53> In addition to co-enzyme QlO, albumin, green tea extract, collagen and hyaluronic acid, the medicine or cosmetic composition containing an active component may include at least one selected from the group consisting of a material, such as arbutin, vitamin C (ascorbic acid), magnesium ascorbyl phosphate (MAP) and ascorbyl acid 2-glucoside (AA2G) , that has a whitening effect; a material, such as paeoniflorin, kinetin, auxin, peptides and alpha- hydroxy acid, that has an anti-wrinkle effect; and a natural soothing material, such as candelilla wax, alpha-bisabolol , aloe vera, manjistha, Guggal, pine needle extract, collagen extract, grapes extract, papaya extract, green tea extract, gingko extract, seaweeds extract, lavender, chamomile, tea tree, lemon balm, honey, peppermint, avocado oil and soybean oil, that has a skin soothing effect.

<54> When the mask pack having an effect to promote the absorption of the 10

active components is applied to the skin for a predetermined period, the active components in the mask sheet penetrate deeply into a user' s skin due to the effect of the mask sheet on the promotion of the moisture mobility, thus to show various cosmetic and medicinal effects.

<55> FIG. 2 (B) shows a stacked structure of the mask pack having a skin soothing effect. A moisture absorbing layer 7, a moisture transfer layer 6 and a moisture diffusing layer 5 are sequentially formed from the inside of the mask sheet .

<56> The moisture absorbing layer 7 is relatively hydrophobic and has a low density, and the moisture diffusing layer 5 is relatively hydrophilic and has a high density. Therefore, the moisture moves spontaneously from the inside to the outside of the mask sheet due to the above structures of the moisture absorbing layer 7 and the moisture diffusing layer 5, and the moisture is then emitted from the moisture diffusing layer. Since a sense of coldness is given to the skin by the spontaneous emission of the moisture, the mask sheet shows a skin soothing effect, a skin pore diminishing effect, etc.

<57> The mask pack may be produced by coating the above-mentioned mask sheet with the cosmetic composition that has a skin soothing effect by providing feelings of refreshment and coldness to the skin.

<58> The cosmetic composition having a skin soothing effect may include at least one selected from the group consisting of natural soothing components that have a skin soothing effect, including candelilla wax, alpha-bisabolol , aloe vera, manjistha , Guggal , pine needle extract, collagen extract, grapes extract, papaya extract, green tea extract, gingko extract, seaweeds extract, lavender, chamomile, tea tree, lemon balm, honey, peppermint, avocado oil and soybean oil .

<59> In the case of the mask pack having an effect to soothe the skin, a skin adhesive layer may be further formed inside the moisture absorbing layer in order for the mask sheet to adhere closely to the skin without a loose adhesion of the mask sheet. The skin adhesive layer may be formed of a natural or synthetic adhesive, or hydrogel that has an adhesive property. FIG. 2 (C) is a cross-sectional view showing the mask pack according to one exemplary embodiment of the present invention in which a hydrogel layer is formed as the skin adhesive layer. [Mode for Invention]

<60> Accordingly, the following exemplary Examples and Test examples of the present invention will be described in more detail, but it should be understood that the present invention is not particularly limited to the Examples and Test examples of the present invention.

<61>

<62> Example 1: Production of mask sheet

<63> A hydrophilic group (-0H)-engrafted polyester shaped yarn (moisture content: 8%) of 75 deniers was fed into a moisture diffusing layer in a highspeed rapier loom, a circular polyethylene strand (moisture content: 0.05%) of 75 deniers was fed into a moisture absorbing layer, and a polyester shaped yarn (moisture content 0.45%) of 75 deniers was fed into a moisture transfer layer, thus to weave a mask sheet so that the moisture absorbing layer can protrude outward more than the moisture transfer layer. In this case, the mask sheet had a sequentially stacked structure of the moisture absorbing layer, the moisture transfer layer and the moisture diffusing layer. Also, the moisture absorbing layer had a density of 60 to 80 (strands/inch2), and the moisture transfer layer and the moisture diffusing layer had a 2 times higher density (a strand number of fibers per unit area (inch2)) than the moisture absorbing layer and the moisture transfer layer, respectively. The mask sheet was cut into mask sheets for a mask pack as shown in FIG. 1.

<64> Test example: Test for absorption of active component into skin

<65> Selection of subjects: active components

<66> In order to select a medicine-containing composition with which a mask sheet having directionality with respect to a moisture penetration direction is coated according the present invention, solubility of the composition was determined according to the increasing concentration of a dissolution promoter. First, the dissolution promoter (Tween 20 or Tween 80) was mixed with a solvent, phosphate buffered saline (PBS, pH 7.4), and an increasing content of an active component, hydrocortisone, was then added to the resulting mixture.

<67> The following Table 1 lists the experimental results on the dissolution rate of a medicine according to the contents of the active component, hydrocortisone, and the dissolution promoter.

<68> [Table 1]

Dissolution of medicine according to the content of dissolution promoter

<69> X: Not wholly dissolved, 0: Wholly dissolved, Δ: Partially dissolved <70> As seen from the results of Table 1, it was revealed that the medicine is dissolved in the composition when the dissolution promoter is present at a content of 20% or more on the basis of the total weight of the composition, which indicates that the dissolution promoter affects the dissolution of the medicine. The test sample 4 having the best dissolution rate was selected to determine an effect of a unidirectional Iy permeable sheet.

<71> <72> Test for compatibility of active component <73> An ascorbyl glucoside (ascorbic acid 2-glucoside; AA2G) solution that is one of functional cosmetic components that promote whiteness of the skin was added to the unidirectional Iy permeable sheet according to one exemplary embodiment of the present invention in order to determine the compatibility between the ascorbyl glucoside solution and the unidirectional Iy permeable sheet . <74> The following Table 2 lists the experimental results on the wetting property and compatibility which were obtained when the ascorbyl glucoside solution was added to the unidirectional Iy permeable sheet.

<75> [Table 2]

Determination of compatibility with mask sheet

<76> 0: Solution is wholly permeated and stable Δ: Solution is partially permeated and metastable.

<77> As seen from the results of Table 2, it was revealed that the ascorbyl glucoside solution easily permeated through the unidirectional Iy permeable sheet, which makes it possible to measure the wetting property. In this case, the test sample 9 showed lower compatibility than the test sample 8 since moisture is diffused in the test sample 9.

<78> <79> Test example 1: Test for absorption of active component into skin <80> In order to measure absorbance of an active component in the skin when the test sample 4 selected in the test for the selection of a subject medicine was applied to the unidirectional Iy permeable sheet, a skin absorption test was carried out using the skins of hairless mice (cytometric bead array (CBA) female mice, 5 ~ 7 weeks-old). The skins of the hairless mice were extracted right after the test, and fixed in the middle of a Franz- type diffusion cell so that stratum corneums of the skins can face upwards. Then, the unidirectional Iy permeable sheet prepared in Example 1 was arranged and fixed with clamps so that a moisture absorbing layer of the Xi7

unidirectional Iy permeable sheet can face upwards and a moisture diffusing layer of the unidirectional Iy permeable sheet can face downwards. Phosphate buffered saline (pH 7.4) was put into a receptor, and homogeneously stirred under a constant temperature of 37°C at a stirring speed of 600 rpm using a magnetic stirrer. The test sample 4 was added to a donor, and the phosphate buffered saline was taken from the receptor at constant time intervals and the receptor was refilled with fresh phosphate buffered saline. A concentration of the hydrocortisone in the taken test sample was measured using a liquid chromatograph (HPLC). The analysis conditions are listed as follows.

<8i> Analysis conditions

<82> - Column: SHISEIDO C18 (bμm, 4.6 X 250 mm) (HighChemical)

<83> - Mobile phase: acetonitrile / distilled water =40/60

<84> - Flow rate: 1.0 ml/min.

<85> - Detector: ultraviolet rays (at 254 nm)

<86>

<87> Test example 2

<88> A skin absorption test of the test sample 4 was carried out in the same manner as in Test example 1, except that the unidirectional Iy permeable sheet prepared in Example 1 was arranged and fixed with clamps so that a moisture absorbing layer and a moisture diffusing layer of the unidirectional Iy permeable sheet can face towards to opposite direction, that is, that the moisture diffusing layer can face upwards. Then, the unidirectional Iy permeable sheet was tested and analyzed in the same manner as in Test example 1.

<89>

<90> Comparative Test example 1

<9i> A skin absorption test of the test sample 4 was carried out in the same manner as in Test example 1, except that only the skins were fixed with clamps without the use of the unidirectional Iy permeable sheet attached onto the skins. Then, the unidirectional Iy permeable sheet was tested and analyzed in the same manner as in Test example 1.

<92> The following Table 3 lists the experimental results on the medicine flux, skin flux rate and flux delay time of the mask packs described in Test examples 1 and 2 and Comparative Test example 1 according to the change in time.

<93> [Table 3]

Measurement of medicine flux, skin flux rate and flux delay time

<94> <95> As shown in Table 3 and FIG. 4, it was revealed that the mask packs of Test example 1 and the Test example 2 using the unidirectional Iy permeable sheet according to one exemplary embodiment of the present invention includes a significantly higher concentration of hydrocortisone that permeates through the skin, and also has a very high flux rate, compared to the mask pack of Comparative Test example 1, which indicates that the medicine flux into the skin is highly improved in applying the unidirectional Iy permeable sheet to the mask pack. Also, it was revealed that the mask pack of Test example 1 has an approximately 1.5 times higher flux concentration than that of Test example 2, which indicates that a staking sequence of the unidirectional Iy permeable sheets affects the flux and flux rate of the active components.

<96> <97> Test example: Test for absorption of active cosmetic components into skin

<98> Test example 3 <99> The mask sheet was arranged and fixed so that a moisture absorbing layer of the mask sheet can face upwards, and the moisture absorbing layer was coated with an ascorbyl glucoside solution (1 mg/ml) to measure absorbance of the ascorbyl glucoside in the skin. Then, this test was carried out in the same manner as in Test example 1. <ioo> A concentration of the ascorbyl glucoside in the taken test sample was measured using a liquid chromatograph (HPLC). The analysis conditions are listed as follows. <ioi> Analysis conditions

<iO2> - Column: SHISEIDO C18 (5_//m, 4.6 X 250 mm) (HighChemical) <iO3> - Mobile phase: 0.02M NaH2P04 solution <iO4> - Flow rate: 1.0 ml/min. <iO5> - Detector: ultraviolet rays 258 nm

<106>

<iO7> Test example 4

<iO8> The mask sheet was arranged and fixed so that a moisture diffusing layer of the mask sheet can face upwards, and the moisture diffusing layer was coated with an ascorbyl glucoside solution (1 mg/ml) to measure absorbance of the ascorbyl glucoside in the skin. Then, this test was carried out in the same manner as in Test example 3.

<1O9> As sown in FIG. 5, it was revealed that the active components do not permeate through the skin 30 minutes after the application of the mask pack of Test example 4, but effectively permeate through the skin 30 minutes after the application of the mask pack of Test example 3. From the results as described in Test example 1, it was confirmed that a staking sequence of the unidirectional Iy permeable sheets affects the flux and flux rate of the active components.

<no> <πi> Test example: Test for skin soothing effect

<ii2> Cooling effect test of mask sheet

<ii3> Test example 5

<ii4> In order to directly measure a cooling effect of the moisture controllable sheet according to exemplary embodiment of the present invention, the unidirectional Iy permeable sheet prepared in Example 1 was arranged so that a moisture diffusing layer of the mask sheet can face upwards, 10 ml of distilled water (temperature: 21"C) was sprayed onto the moisture diffusing layer, and the changes in temperature were measured according to the time. A region of the unidirectional Iy permeable sheet measured by a thermometer was covered with an aluminum foil and an adiabatic Styrofoam in order to minimize an effect on the environments.

<115>

<ii6> Comparative Test example 2

<ii7> 10 ml of distilled water (temperature: 21°C) was sprayed onto a conventional nonwoven fabric mask sheet having the same thickness as the mask sheet used in Test example 5, and the changes in temperature were then measured according to the time. A region of the nonwoven fabric mask sheet measured by a thermometer was covered with an aluminum foil and an adiabatic Styrofoam in order to minimize an effect on the environments. The results are listed in the following Table 4 and shown in FIG. 6.

<U8> [Table 4]

Measurement of cooling effect

<1 19> <120> As shown in Table 4 and FIG. 6, it was revealed that the mask pack using the moisture controllable sheet (Test example 5) has an excellent cooling effect, compared to that of Comparative Test example 2. In particular, it was confirmed that the mask pack of Test example 5 sustains its cooling effect at a lower temperature than that of Comparative Test example 2.

<121> Whenever the distilled water (temperature: 21°C) was sprayed onto the mask sheet, a temperature of the mask sheet was dropped by the temperature of the distilled water. Then, it was confirmed that the mask pack of Comparative Test example 2 shows its cooling effect (20.8°C) of approximately 21.5% at least 20 minutes after the application, compared to the temperature of the mask pack at a time point of 0 minute (before the test), but the mask pack of Test example 5 shows its cooling effect of approximately 21.5% approximately 3 minutes after the application, which indicates that this is owing to the structure of the mask sheet that promotes the movement of moisture, and a surface temperature of the mask sheet is lowered by continuous evaporation of moisture.

<122>

<123> Measurement of skin soothing effect in application of distilled water <124> Test example 6 <]25> 6 male and female adults (age: 30± 3) who are sensitive or considered to be sensitive to the stimulus were selected, and kept for 1 hour under conditions of constant temperature and moisture (24 ~ 26°C, relative moisture of 40 ~ 50%). Then, the unidirectional Iy permeable sheet of the present invention prepared in Example 1 was put on one cheekbone region so that a moisture diffusing layer of the unidirectional Iy permeable sheet can face upwards, kept for 20 minutes, and then removed. In this case, a temperature of the skin was measured according to the time right until the removal of the mask sheet. At time points of 0 minute (before the application of a mask pack), 10 and 20 minutes after the application of a mask pack, and 10 minutes (30 minutes) after the removal of a mask pack, regions of interest (ROD of the cheekbone region were set using a spot thermometer (MINOLTA CO., LTD. JAPAN), and an average skin temperature in the ROI was calculated to analyze the change in temperature according to the time.

<126> <127> Comparative Test example 3 <128> The experiment was carried out in the same manner as in Test example 6 to calculate an average skin temperature in the ROI and analyze the change in temperature according to the time, except that the conventional nonwoven fabric sheet prepared in Test example 6 was put on the other cheekbone region.

<129> The results are listed in the following Table 5 and shown in FIG. 7. <i30> [Table 5]

Measurement of changes in temperature according to time after application of mask sheet

<131>

<i32> As shown in Table 5 and FIG. 7, it was revealed that the mask pack of Test example 6 has an excellent cooling effect on the skin, compared to that of Comparative Test example 3. In particular, it was confirmed that, after the removal of the mask sheet, the mask pack of Test example 6 sustains its cooling effect at a lower temperature than that of Comparative Test example 3. These results tend to be similar to those of Table 4 in which the cooling effect was directly measured at a room temperature using the distilled water, which indicates that it is possible to enhance the skin soothing effect of the mask pack by controlling the movement of moisture.

<133>

<134> Examples 2 and 3: Preparation of cosmetic composition used in inventive mask pack

<135> Cosmetic compositions of Examples 2 and 3 were prepared, based on the components and contents as listed in the following Table 6, as follows. Components of Phase A listed in the following Table 6 were homogeneously mixed, and thoroughly dispersed and dissolved. When the components of Phase A were thoroughly dissolved, components of Phase A were weighed and thoroughly dissolved, and the resulting mixture of Phase B was added to the Phase A, and stirred for 30 minutes. Phases C and D were added to the resulting mixture, and homogeneously dispersed.

<i36> [Table 6]

Components and contents of cosmetic composition

<137> <138> Test example T- Measurement of skin soothing effect of cosmetic composition-containing mask pack

<I 39> The unidirectional Iy permeable sheets prepared in Example 1 were coated respectively with the cosmetic compositions prepared in Examples 2 and 3, and then tested in the same manner as in Test example 6 to analyze the changes in temperature according to the time. The results are listed in the following Table 7 and shown in FIG. 8. At time points of 0 minute (before the application of a mask pack), 10 and 20 minutes after the application of a mask pack, and 10 minutes (30 minutes) after the removal of a mask pack, measured images were obtained using an IRcamera (Thermogam, IRE KOREA LTD.). The measured images taken by the IR camera are shown in FIG. 9.

<140> [Table 7]

<141>

<142> As shown in Table 7 and FIG. 8, it was revealed that the maximum cooling effects of the mask packs of Examples 2 and 3 according to the present invention are shown to be 24% in the changes in skin temperature, and the cooling effects are more effective than that of cooling water. When the unidirectional Iy permeable sheet was coated with the cosmetic composition including urea powder and xylitol (Example 3), the cooling effect of the unidirectional Iy permeable sheet was not rather significant when compared to the unidirectional Iy permeable sheet coated with the cosmetic composition of Example 2, which indicates that the mask pack can show a sufficient cooling effect due to the movement of moisture in the cosmetic composition without the use of xylitol and urea powder that are expected to show a cooling effect. Therefore, it was confirmed that the mask pack according to the present invention has effect to reduce a temperature of the skin and provide a feeling of refreshment to the skin by using the moisture controllable sheet since the cosmetic composition used in the mask pack does not contain components that may induce pungent stimulus to the skin when the components are used in a large amount.

<143> From the images of IR camera as shown in FIG. 9, it was revealed that the cooling effect is more excellent in the right cheekbone region to which the mask pace of Example 2 is applied than in the left cheekbone region to which the mask pace of Example 3 is applied, and the cooling effect of the mask pace of Example 2 lasts up to approximately 20 minutes. From the above results, it was confirmed that the cosmetic composition according to one exemplary embodiment of the present invention has an effect to allow a user to actually feel a skin soothing effect by continuously sustaining a low skin temperature.

<144> <145> Examples 4 and 5: Preparation of hydrogel mask pack <146> A hydrogel mask pack in which a hydrogel layer as the skin adhesive layer is formed inside the mask sheet prepared in Example 1 was prepared, as follows.

<147> Compositions for a hydrogel-type mask pack were prepared based on the components and contents as listed in the following Table 8.

<148> [Table 8]

Components and contents of hydrogel-type pack

<149> <150> Hereinafter, the preparation method of the hydrogel mask pack having the components and contents of Example 4 will be described in more detail. First, glycerine and locust bean resin were put into a3l heating container, and mixed at a room temperature while stirring, and a solution of methylparaben and propylparaben was added to the heating container to obtain a mixture. Then, deionized water was added to the mixture, and the resulting mixture, was then warmed up to 85°C to prepare a gel solution. The other components were sequentially added to the gel solution under a constant temperature of 85^°C, thus to obtain a hydrogel composition.

<i5i> The hydrogel composition was introduced at 80°C into wicks of the mask sheet prepared in Example 1, and formed into a mask pack. The mask pack was cooled to a room temperature to obtain a phase-modified hydrogel-type mask pack.

<152>

<i53> Test example 8: Measurement of skin soothing effect of hydrogel-type mask pack

<i54> The hydrogel type mask packs prepared in Examples 4 and 5 were tested in the same manner as in Test example 6, thus to analyze the changes in temperature according to the time. The results are shown in FIG. 10.

<155> From the results of FIG. 10, it was confirmed that the hydrogel composition of Example 5 according to the present invention is higher in the changes in skin temperature than the hydrogel composition of Example 4 when the hydrogel compositions of Examples 4 and 5 were applied to the mask packs, respectively. However, it was seen that the hydrogel composition of Example 5 does not show a more effective cooling effect than that of Test example 7.

<156>

<i57> Test example 9: Panel test for skin soothing effect

<i58> The hydrogel-type mask packs prepared in Test examples 7 and 8 were applied to subjects' faces to perform a panel evaluation test for feelings of wetting and refreshment while measuring the soothing effect of the hydrogel-type mask packs.

<i59> In order to determine a soothing effect and a feeling of wetting of a mask pack when each of the cosmetic compositions of Example 2, Example 4, Example 5 and Example 3 were applied to the mask pack, the following test was performed. The test for a soothing effect was repeated twice, and the results are listed in the following Tables 9 and 10, based on the 5 point scales.

<160> <161> 5 Point scales <162> 1: Very bad, 2: Bad, 3: Mean, 4: Good, and 5: Very good <163> [Table 9]

Test for feeling of wetting in application of mask sheet

<164> <165> [Table 10]

Test for feeling of refreshment in use of mask pack

<166>

<167> In the Table 10, an average is obtained by dividing a value of (a point scale x a number of subjects) by the sum of subjects.

<168> When the cosmetic composition of Example 2 was applied to the mask pack, it was revealed that the mask pack has good feelings with average point scale values of the good feelings of wetting and refreshment being 4.75 and 4.92, respectively. However, when the cosmetic composition of Example 4 was applied to the mask pack, it was revealed that the mask pack is poor in feelings of wetting and refreshment.

<169>

<170>

[Industrial Applicability]

<i7i> As described above, the present invention is related to a re-usable mask pack, and provides a technology of manufacturing a mask pack having various effects with ease by changing a structure of the mask sheet. Therefore, the mask pack according to the present invention may be useful to apply to the field of industrial applications and make a contribution to the environmental protections.

Claims

[CLAIMS]

[Claim 1]

A mask pack using a moisture controllable mask sheet to apply to the skin, wherein the mask sheet has a 3-layered structure of a moisture absorbing layer, a moisture transfer layer and a moisture diffusing layer and is directional with respect to a moisture penetration direction.

[Claim 2]

The mask pack according to claim 1, wherein the mask sheet has a moisture diffusing layer, a moisture transfer layer and a moisture absorbing layer formed sequentially from the inside thereof, and the moisture diffusing layer, the moisture transfer layer and the moisture absorbing layer are relatively reduced in density and hydrophilicity.

[Claim 3]

The mask pack according to claim 2, wherein the moisture diffusing layer of the mask sheet further comprises a skin adhesive layer formed therein.

[Claim 4]

The mask pack according to claim 2 or 3, wherein the moisture absorbing layer of the mask sheet is coated with a medicine or cosmetic composition that contains an active component.

[Claim 5]

The mask pack according to claim 4, wherein the medicine or cosmetic composition that contains an active component comprises at least one selected from the group consisting of co-enzyme QlO, albumin, green tea extract, collagen and hyaluronic acid; a material, such as arbutin, vitamin C (ascorbic acid), magnesium ascorbyl phosphate (MAP) and ascorbyl acid 2- glucoside (AA2G) , that has a whitening effect; a material, such as paeoniflorin, kinetin, auxin, peptides and alpha-hydroxy acid, that has an anti-wrinkle effect; and a material, such as candelilla wax, alpha-bisabolol , aloe vera, manjistha , Guggal , pine needle extract, collagen extract, grapes extract, papaya extract, green tea extract, gingko extract, seaweeds extract, lavender, chamomile, tea tree, lemon balm, honey, peppermint, avocado oil and soybean oil, that has a skin soothing effect.

[Claim 6]

The mask pack according to claim 4, wherein the cosmetic composition that contains an active component is applied in the form of a solution, a lotion, a cream, a gel, a multi-lamella emulsion (MLE) or elastic liposome.

[Claim 7]

The mask pack according to claim 1, wherein the mask sheet has a moisture diffusing layer, a moisture transfer layer and a moisture absorbing layer formed sequentially from the inside thereof, and the moisture diffusing layer, the moisture transfer layer and the moisture absorbing layer are relatively increased in density and hydrophilicity.

[Claim 8]

The mask pack according to claim 7, wherein the moisture diffusing layer of the mask sheet further comprises a skin adhesive layer formed therein.

[Claim 9]

The mask pack according to claim 7 or 8, wherein the mask sheet is coated with a cosmetic composition having a skin soothing effect.

[Claim 10]

The mask pack according to claim 2 or 7, wherein the moisture absorbing layer of the mask sheet is formed of a polyolefin-based fiber having a low moisture content, the moisture diffusing layer is formed of a hydrophilically-improved and modified polyester, polyamide fiber or cotton fiber that has a high moisture content, and the moisture transfer layer is formed of a polyester shaped yarn having intermediate hydrophilicity between the moisture absorbing layer and the moisture diffusing layer.

[Claim 11]

The mask pack according to claim 2 or 7, wherein the moisture transfer layer and the moisture diffusing layer have a 1.2 to 4 times higher density than the moisture absorbing layer and the moisture transfer layer, respectively.