WO2021040498A1 - Cosmetic patch - Google Patents

Abstract

Provided is a cosmetic patch. A cosmetic patch according to one embodiment of the present invention is implemented by comprising: a skin attachment layer including a fibrous web and a moisturizing composition filled in the pores of the fibrous web; a first cover layer disposed on one side of the skin attachment layer; and a second cover layer disposed on the other side of the skin attachment layer. Accordingly, the cosmetic patch can prevent or delay the volatilization of effective ingredients to be provided to the skin, while having high content of the effective ingredients. In addition, even though the cosmetic patch is implemented in a very thin thickness, the cosmetic patch can have sufficient content of the effective ingredients, and since excessive content of the effective ingredients is not provided, it is possible to prevent discomfort during use or contamination due to spillage of the effective ingredients on areas other than the skin to be treated. Furthermore, since the cosmetic patch has excellent clinginess and adhesiveness to the skin without a separate adhesive layer or bonding layer, it is possible to prevent skin problems due to ingredients forming the separate adhesive layer or bonding layer, or a problem of the ingredients partially being dissolved and remaining on the skin.

Description

Beauty Patch

The present invention relates to a cosmetic patch, and more particularly, to a cosmetic patch having excellent skin adhesion and adhesion without a separate adhesive layer or adhesive layer.

A general beauty patch is manufactured to have functions such as whitening, wrinkle improvement, moisture supply, skin trouble alleviation, skin elasticity, antibacterial, etc. by containing an essence containing functional substances such as natural extracts, proteins and vitamins on a nonwoven fabric. come.

The above ingredients useful for the skin are generally dissolved in a hydrophilic solvent such as purified water and introduced into a substrate such as a nonwoven fabric.In order to increase the filling rate of the composition in the nonwoven fabric in consideration of the hydrophilic properties of the composition, the nonwoven fabric is also made of a material having high hydrophilicity. I have used what I used.

On the other hand, the solution in which the ingredients useful for the skin supported in the nonwoven fabric are dissolved can be easily evaporated when exposed to the air, so a conventional cosmetic patch is a cosmetic patch with a film-type cover member to prevent evaporation of the solution until it is applied to the skin. It was common to be distributed in a sealed package with a cover.

However, these measures are only effective for storage and distribution, but in order to apply the cosmetic patch to the skin, the film-type cover member must be removed.After removing the film-type cover member, the cosmetic patch exposed to the air is a composition in the form of a solution supported in the nonwoven fabric. There is a problem in that the active ingredients that must reach the skin remain as they are in the cosmetic patch because it evaporates quickly before reaching the sub-skin tissue. In addition, as the evaporation of the composition in a solution state occurs, the cosmetic patch is lifted from the skin or flows down due to its own weight, so that even the remaining composition that is not evaporated is difficult to reach the skin smoothly. Furthermore, the fast drying time of the beauty patch makes it difficult to deliver the active ingredients remaining in the beauty patch to the skin, and after the beauty patch is dried to a certain level, there is a problem that the active ingredients, etc., are reversely transferred from the skin to the beauty patch.

In order to prevent this, recently, excessive amounts of compositions useful for the skin are treated on the nonwoven fabric.In this case, due to the excessive composition on the outside of the nonwoven fabric, the film-type cover member does not adhere well to the beauty patch, or even if it is attached, slipping occurs due to external force. Thus, there is a problem in that the film-type cover member is located off the cosmetic patch, and thus, a cosmetic patch portion that is not protected by the cover member occurs. In addition, in the process of removing the cover member and attaching it to the skin, the cosmetic patch treated with an excessive amount of the useful composition may cause discomfort due to excessive smearing of the composition on the user's hand, or the composition may spill out of the cosmetic patch, resulting in the user's clothes or floor. There is a problem that pollutes. In addition, there is a problem in that the moisturizing composition in the cosmetic patch is volatilized after the cosmetic patch is attached to the skin due to the excessively treated composition, so that small changes in the skin surface are easily pushed and lifted or peeled off even before drying.

Accordingly, recently, a layered cosmetic patch in which a separate layer that prevents evaporation of a solution containing useful components is laminated on the solution-supported nonwoven fabric has been developed. However, even if a separate layer is further provided, evaporation to a desired level is delayed. It is difficult to prevent or prevent, and the thickness of the sheet applied to the skin increases, and thus there is a problem that the skin adhesion decreases. In addition, there is a problem that the manufacturing cost and manufacturing time increase due to the separate layer.

In addition, after attaching the beauty patch to the skin, a separate adhesive or adhesive layer is formed on the surface of the sheet in contact with the skin to prevent it from being lifted or spilled.The separate adhesive or adhesive layer may cause allergies depending on the user when it comes into contact with the skin. It can cause, and it can be partially dissolved by a solution containing an useful component, so there is a problem that adhesion or adhesive components are stained on the skin.

Accordingly, when the beauty patch is attached to the skin, it does not cause discomfort to the user, it is easy to attach, and the solution contained in the beauty patch prevents contamination of the hands or surroundings other than the skin on which the beauty patch is processed. There is an urgent need to develop a cosmetic patch that has excellent skin adhesion and adhesion without an adhesive layer, has a useful composition with a high content, and prevents the volatilization of useful ingredients when exposed to air.

The present invention has been devised in consideration of the above points, and it is possible to provide a high content of useful ingredients while preventing or delaying the volatilization of useful ingredients to be provided to the skin or solutions containing the same, and to quickly apply the provided useful ingredients to the skin. The purpose is to provide a beauty patch that can be delivered to.

In addition, the present invention prevents the oil from spilling onto the hand or from the skin area to be attached, but to the periphery of the skin during the process of attaching the cosmetic patch to the skin, as the surface remains semi-dry despite the high content of useful ingredients. There is a different purpose to providing a cosmetic patch.

In addition, the present invention has another object to provide a cosmetic patch having excellent adhesion and adhesion to the skin without a separate adhesive layer or adhesive layer.

In order to solve the above problems, the present invention is a skin adhesion layer comprising a fibrous web formed of fibers having an average pore diameter of 10 µm or less and an air permeability of 50 cfm or less, and a moisturizing composition filled in the pores of the fibrous web, and the skin adhesion layer It provides a cosmetic patch including a first cover layer disposed on one side of the skin and a second cover layer disposed on the other side of the skin adhesion layer.

According to an embodiment of the present invention, in the cosmetic patch, after the first cover layer is removed and one surface of the exposed skin adhesion layer is applied to the skin, the second cover layer may be separated from the skin adhesion layer.

In addition, the fibrous web may have a basis weight of 2 to 50 g/m 2 and a thickness of 2 to 50 μm.

In addition, the fibrous web may include at least one elastic component selected from the group consisting of polyurethane, poly(methyl matacrylate) (PMMA), and polypyrole.

In addition, the fibrous web further includes at least one strength reinforcing component selected from the group consisting of polyvinylidene fluoride, polysulfone and polyethersulfone (PES), and the strength reinforcing component is 20 to 80 based on the total weight of the fiber. It may be included in weight percent.

In addition, the weight average molecular weight of the polyurethane may be 50,000 to 300,000.

In addition, the moisturizing composition has a viscosity of 200 to 750 cP, and may be filled in the pores of the fiber web.

In addition, the fibrous web may be formed of fibers having a diameter of less than 1 μm.

In addition, the fibrous web may have a basis weight of 2 to 10 g/m 2, a thickness of 2 to 20 μm, and an average pore diameter of 0.2 to 5 μm.

In addition, the adhesion between the second cover layer and the skin adhesion layer may be greater than the adhesion between the first cover layer and the skin adhesion layer.

Further, the first cover layer and the second cover layer are non-woven fabrics, each independently having a thickness of 10 to 100 μm and a basis weight of 10 to 50 g/m 2.

In addition, the content of the moisturizing composition may be 6 ~ 30g/m2.

In addition, the present invention includes a skin adhesion layer comprising a fibrous web, wherein the fibrous web provides a member for a beauty patch having a volatilization rate of 5% or less at 23° C. for 1 hour evaluated in a state in which a moisturizing composition is supported. In this case, the moisturizing composition may be a mixture of a compound represented by Chemical Formula 1, Lubrajel DV-Free, and DI in a weight ratio of 5:1:3.

According to the present invention, the cosmetic patch is provided with a liquid useful component or useful component in a high content to be provided to the skin, and while the volatilization of the dissolved solution is prevented or delayed, the useful component can be quickly delivered to the skin. In particular, since the volatilization of useful ingredients, solvents, or dispersion media can be minimized for a long time at the skin temperature to which the cosmetic patch is applied other than room temperature, sufficient time for absorbing the useful ingredients into the skin can be secured. In addition, the prolonged volatilization time can reduce the hassle of removing the cosmetic patch from the skin after a certain period of time as it extends the skin attachment time of the cosmetic patch. In other words, the normal beauty patch dries considerably after 15 to 20 minutes elapsed after the skin is attached, so if the beauty patch is attached to the skin for more than a certain period of time, there is a problem of re-absorbing the useful components of the liquid that have moved to the skin. Even if the cosmetic patch according to the invention is attached to the skin for a long time, it is possible to prevent the liquid useful ingredients from moving backward from the skin to the cosmetic patch. Furthermore, even though it is implemented in a very thin thickness, it is possible to provide useful ingredients in a sufficient amount, and since the useful ingredients are not provided in an excessive amount, it is possible to prevent contamination due to discomfort or flow of useful ingredients to places other than the skin to be treated. In addition, since it has excellent adhesion and adhesion to the skin without a separate adhesive layer or adhesive layer, it is possible to prevent skin problems caused by a separate adhesive layer or adhesive layer, or a problem in which they partially dissolve and remain on the skin.

1 is a plan view of a cosmetic patch according to an embodiment of the present invention and an enlarged cross-sectional view along the X-X' boundary line,

2 is a view showing another shape of the beauty patch according to an embodiment of the present invention,

3A to 3C are diagrams illustrating a use state of attaching a cosmetic patch to the skin according to an embodiment of the present invention, and

4 and 5 are photographs showing a volatilization experiment of a cosmetic patch and a moisturizing composition contained in the cosmetic patch according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail so that those of ordinary skill in the art may easily implement the present invention. The present invention may be implemented in various different forms and is not limited to the embodiments described herein.

Referring to FIG. 1, the cosmetic patch 100 of the present invention includes a skin attachment layer 110, a first cover layer 221 provided on one surface of the skin attachment layer 110, and the other surface facing the one surface. It includes a second cover layer 222 provided in the.

The skin adhesion layer 110 includes a fibrous web and a moisturizing composition (not shown) filled in the pores of the fibrous web, and the moisturizing composition does not flow out to the skin adhesion surface even though the moisturizing composition is filled. As a condition, when the skin is attached, the initial push is prevented so that it can be stably attached to the skin, and the moisturizing composition does not adhere to the hand.

The fibrous web maintains the shape of the skin adhesion layer 110 and functions as a support capable of supporting the moisturizing composition. The fibrous web may be formed of fibers 111, and specifically, one strand of fibers may be bent to form a web, or several strands of fibers may be randomly accumulated to form a web.

The fiber 111 is not dissolved in the moisturizing composition and can be used without limitation in the case of a material that can be implemented in a fibrous shape. However, when applied to the skin, the fiber 111 is easily attached without a separate adhesive layer/adhesive layer or a material capable of expressing this effect, and is bent and continuously adheres to the skin surface whose surface morphology is constantly changing. May include an elastic component. As an example of the elastic component, it may be one or more selected from the group consisting of polyurethane, poly(methyl matacrylate) (PMMA), and polypyrole, more preferably polyurethane. Polyurethane is advantageous in terms of adhesion persistence that can be adhered to the skin for a long time without being lifted on the surface of the skin having various morphologies and constantly fluctuating. On the other hand, polyurethane is known to have hydrophobic properties, but the wettability increases rapidly after a predetermined period of time after the liquid formulation is treated, so even when the liquid formulation is hydrophilic, it may be advantageous to contain it at a high filling rate in the pores in the fiber web. . At this time, the polyurethane may have a weight average molecular weight of 50,000 to 300,000, more preferably 150,000 to 250,000, through which there is an advantage of more remarkably achieving the desired effect of the present invention.

In addition, the fiber 111 may further include a strength reinforcing component in order to increase the strength of the fibrous web in addition to the elastic component, for example, including at least one selected from the group consisting of a fluorine-based compound, polyethersulfone, and polysulfone. can do. The fluorine-based compound may be known ones, but preferably polyvinylidene fluoride. When polyvinylidene fluoride, polysulfone, or polyethersulfone is used as the strength enhancing component, it may be more advantageous to provide the moisturizing composition of the present invention in a high content and to be supported for a long time without volatilization for a long period of time.

When forming fibers 111 by mixing polyurethane as an elastic component with a strength reinforcing component, the strength reinforcing component may be included in 20 to 80% by weight based on the total weight of the fiber, more preferably 20 to 50% by weight, For example, it may be contained in 30% by weight. If the strength reinforcing component is provided with less than 20% by weight based on the weight of the fiber, it may be difficult to achieve the desired mechanical strength and spinnability may be deteriorated. In addition, a more improved effect may not be exhibited in the amount of impregnation of the moisturizing composition described later or the retention period after impregnation. Further, it is not easy to maintain the shape and can be easily torn even with a small force, and thus it may not be easy to attach to the skin surface.

In addition, if it exceeds 80% by weight based on the fiber weight, the rigidity of the fiber web increases, and thus the changing skin surface does not change rapidly, so there is a concern that adhesion and adhesion may decrease. In addition, it may be difficult to delay the volatilization of the moisturizing composition to be described later to a desired level.

In addition, the cosmetic patch of the present invention exhibits a slightly sticky sensation similar to a semi-dry state in which the touch of one side of the skin adhesion layer 110 in a state containing a moisturizing composition, through which a separate adhesion or adhesive layer or an excessive amount of Excellent adhesion and adhesion to the skin can be expressed without a moisturizing composition. However, if the strength reinforcing component is excessively included, it may be difficult to develop the desired level of adhesion and adhesion.

In addition, the fiber web may be a nanofiber web formed of fibers 11 having a diameter of less than 1 μm. As an example, the diameter of the fiber 11 may be 300 to 600 nm. In addition, the fiber web has an average pore diameter of 10 μm or less, preferably 0.01 to 5 μm, more preferably 0.2 to 5 μm, even more preferably 0.2 to 3 μm, even more preferably 0.5 to 1.0 μm. I can. In addition, the air permeability may be 0.3 to 50 cfm, more preferably 0.3 to 30 cfm, even more preferably 1 to 10 cfm, and more preferably 1 to 5 cfm. When the fiber diameter, average pore diameter and air permeability of the fiber web are satisfied within the preferred range of the present invention, the moisturizing composition can be provided in a high content at a high speed in the fiber web, and at the same time, the skin adhesion surface of the fiber web after being filled in the pores of the fiber web It is possible to implement a semi-dry state in which the moisturizing composition does not spill or smear, and can ensure storage stability that can maintain the semi-dry state even when stored for a long time. In addition, there is an advantage of minimizing volatilization of the moisturizing composition even when the fibrous web is exposed to air or when it comes into contact with the skin surface of 35°C or higher. If the average pore diameter is less than 0.01 μm and/or the air permeability is less than 0.3 cfm, there is a concern that the amount of impregnation of the moisturizing composition may decrease. In addition, there is a concern that the attachment time of the skin patch may be excessively extended because the delivery speed of the moisturizing composition to the skin is slow. In addition, when the average pore diameter exceeds 10 μm and/or the air permeability exceeds 50 cfm, the volatilization rate of the moisturizing composition on the surface of the fibrous web increases, thereby reducing skin adhesion, and thus it may be difficult to attach a skin patch for a long time. In addition, due to the rapid volatilization rate, a phenomenon in which the moisturizing composition delivered to the skin may reversely migrate to the skin patch, and to prevent this, the attachment time of the skin patch must inevitably be reduced, and due to this, sufficient useful ingredients move to the skin. You may not be able to.

When the average diameter of the fibers 111 and the average pore diameter of the fiber web satisfy the preferred range of the present invention, the fiber web has a basis weight of 50 g/m 2 or less, preferably 2 to 50 g/m 2, more preferably 2 to It may be 10g/m2 or less, and for example, it may be 3 to 6g/m2. In addition, the fiber web may have a thickness of 2 to 50 μm, preferably 2 to 30 μm, more preferably 2 to 10 μm. The basis weight and thickness of the fibrous web can be more advantageous in achieving the desired effect of the present invention by satisfying the above-described range, and in particular, it is possible to reduce the feeling of adhesion upon skin adhesion while improving skin adhesion, and semi-dry even when stored for a long time. There is an advantage of ensuring storage stability that can maintain the state. If the basis weight exceeds 50g/㎡ and/or the thickness exceeds 50㎛, the feeling of adhesion increases when attaching to the skin, which may give the user an uncomfortable feeling. There is a concern that adhesion may be lowered. In addition, if the basis weight is less than 2 g/m 2 and/or the thickness is less than 2 μm, it may be easily torn, and thus workability may be very deteriorated. In addition, the amount of impregnation of the moisturizing composition may be reduced. In this case, the basis weight may be the basis weight of the fiber web measured in a state in which the moisturizing composition is removed.

The fibrous web according to an embodiment of the present invention has a basis weight of 2.0 to 10 g/m 2, a thickness of 2 to 20 μm, an air permeability of 1 to 30 cfm, and an average pore diameter of 0.2 to 5 in the state where the moisturizing composition is removed. ㎛ may be, through this, it is possible to provide a high content moisturizing composition in the fibrous web while minimizing the volatilization of useful ingredients that occur when the fibrous web is exposed to the air after the moisturizing composition is filled in the pores of the fibrous web, and the moisturizing composition It is possible to improve the delivery speed of the skin, and when the first cover layer 212 and the second cover layer 222 are removed, it may be more suitable to maintain a semi-dry surface condition of the skin adhesion layer.

In addition, the fibrous web may have a larger ratio of through-type pores penetrating through both sides of the first cover layer 212 and the second cover layer 222, respectively, compared to the conventional fibrous web, through which moisturizing described later. The moisturizing composition is retained in a high content while minimizing the volatilization of useful ingredients that occur when the fiber web is exposed to the air after the composition is filled in the pores of the fibrous web, and such a moisturizing composition can be delivered to the skin with excellent efficiency.

Next, the moisturizing composition filled in the pores of the fibrous web will be described.

The moisturizing composition includes useful ingredients that can impart a moisturizing effect to the skin, and these ingredients may be used without limitation in the case of known ingredients, but may preferably include a glycerol-based ingredient. In addition to providing a moisturizing effect, the glycerol-based component exhibits a viscous effect on one side of the skin adhesion layer, so it may be advantageous to provide high adhesion to the skin even if no additional adhesive or adhesive component is provided. have. In addition, these components have the advantage of being able to impregnate the fiber web with a high content despite having strong hydrophilicity compared to other moisturizing components. The glycerol-based component may be glycerol, a modified product of glycerol or a modified product using glycerol. The modified product of glycerol may be a compound represented by Formula 1 below. In addition, the modified product using glycerol may be, for example, a polyacrylic acid copolymer in which a portion of acrylic acid is esterified using glycerol.

[Formula 1]

In Formula 1, R ₁ , R ₂ and R ₃ are each independently hydrogen or an alkyl group having 1 to 2 carbon atoms, and x+y+z may be an integer of 3 to 3000, more preferably an integer of 15 to 45. Preferably, considering the ease of impregnation in the hydrophobic fibrous web, R _{1 , R 2} and R ₃ may be hydrogen. In addition, in Formula 1, x+y+z may be 3 to 3000. If x+y+z is less than 3, it may be difficult to delay or prevent volatilization in air to be expressed at a desired level, and exceed 3000. In this case, the amount of impregnation in the fiber web may be significantly reduced.

According to an embodiment of the present invention, the moisturizing composition may contain a glycerin-based component, preferably glycerol and any one or more of the compounds represented by the following formula (1) in 40% by weight or more of the total moisturizing composition, more preferably It may be contained in an amount of 50% by weight or more, and through this, there is an advantage of remarkably preventing the volatilization of these hydrophilic liquid active ingredients even when purified water or a hydrophilic liquid active ingredient is provided together in the moisturizing composition. In addition, when the moisturizing composition contains purified water or a hydrophilic liquid useful ingredient in the moisturizing composition, it may be more advantageous to delay the volatilization of the moisturizing composition if the moisturizing composition contains both glycerol and the compound represented by the above formula 1. .

The above-described moisturizing composition may be obtained by treating the above-described fiber web with a moisturizing composition having a viscosity of 200 to 750 cP. As described above, the fibrous web according to the present invention does not include a separate adhesive layer or adhesive layer, but the appropriate viscosity of the moisturizing composition may help the skin adhesion. In addition, it may help to increase the impregnation amount of the moisturizing composition impregnated into the fibrous web. Accordingly, preferably, the moisturizing composition may have a viscosity of 200 to 750 cP. However, if the viscosity is less than 200 cP, impregnation into the fibrous web may be easy, but volatilization may increase significantly when exposed to air, and this decreases the sticky touch, such as having the viscosity of the surface of the skin adhesion layer, and eventually affects the skin surface. There is a concern that adhesion may be significantly reduced. In addition, if the viscosity exceeds 750 cP, there is a concern that the time required for filling after processing the composition may be excessively extended or it may be difficult to fill itself to a desired level. In addition, even when it is filled in the fibrous web, it is difficult to deliver it to the skin, so that the skin adhesion layer must be attached to the skin for a long time, or even if it is attached for a long time, delivery itself may not be performed properly.

The basis weight of the skin adhesion layer 110 in which the above-described moisturizing composition is filled in the fibrous web may be 50 g/m 2 or less, for example, 6 to 30 g/m 2.

Next, a first cover layer 221 and a second cover layer 222 for protecting the skin attachment layer 110 are provided on both sides of the above-described skin attachment layer 110. The first cover layer 221 and the second cover layer 222 may all be removed before the skin adhesion layer 110 is applied to the skin, but preferably only the first cover layer 221 is removed first, The second cover layer 222 may be removed after the skin adhesion layer 110 is attached to the skin. As described above, the skin adhesion layer 110 containing the moisturizing composition may exhibit properties such as sticky adhesion on the surface. When the skin adhesion layer 110 is directly gripped by hand, the skin adhesion layer 110 It may not be easily attached to the skin surface to be applied because it does not come off easily. Accordingly, the second cover layer 222 is preferably removed after the skin adhesion layer 110 is attached to the skin.

The first cover layer 221 and the second cover layer 222 may be of a material and shape provided in a conventional cosmetic patch, so the present invention is not particularly limited thereto, but preferably the second cover layer 222 ) May be a nonwoven fabric, and more preferably, both the first cover layer 221 and the second cover layer 222 may be nonwoven fabrics. The cover layer in the form of a non-porous film is slippery due to the nature of the material itself, and has a high rate of contact with lines or points rather than surface contact with the fiber web of the skin adhesion layer, so the adhesion is not good, and there is a risk of leaving the initial attachment position due to external force. . However, when a nonwoven fabric is used, it is not slippery and has a good feel, so it is easy to peel it off, and it has an excellent feeling of use. In addition, the nonwoven fabric is advantageous in increasing the contact area with the fibrous web, and thus can have good adhesion to the fibrous web.

On the other hand, since the nonwoven fabric is a porous substrate through which air can permeate, there is a concern that the skin adhesion layer 110 is indirectly exposed to air. In this case, even if the skin adhesion layer 110 prevents volatilization of the moisturizing composition as much as possible, there is a concern that some volatilization may occur. Accordingly, preferably, the nonwoven fabric used as the first cover layer 221 and the second cover layer 222 may each independently have a thickness of 10 to 100 μm and a basis weight of 10 to 50 g/m 2. In the case of a nonwoven fabric satisfying these conditions, even if the skin adhesion layer 110 is indirectly exposed to air through a flow path formed in the nonwoven fabric, it may be advantageous in minimizing volatilization of the moisturizing composition. In addition, the material of the nonwoven fabric may be polypropylene, for example.

The cosmetic patch 100 of the present invention described above is prepared by processing the moisturizing composition on the prepared fibrous web to prepare the skin adhesion layer 110, and then laminated with the first cover layer 221 and the second cover layer 222. Can be manufactured. Alternatively, the second cover layer 222 and the separately manufactured fibrous web are laminated or the fibrous web is electrospun on the second cover layer 222, and then the fibrous web is treated with a moisturizing composition to provide a skin adhesion layer 110. ), and the first cover layer 221 may be laminated. At this time, the moisturizing composition may be treated through a known method such as spraying or impregnation on the fiber web, so the present invention is not particularly limited thereto.

The skin patch according to an embodiment of the present invention manufactured by the above-described method includes a skin adhesion layer including a fibrous web, and the skin adhesion layer 110 is measured in a state in which the moisturizing composition is supported on the fibrous web. Since the volatilization rate at ℃, 1 hour is less than 5%, the moisturizing composition does not easily volatilize even if it is exposed to the air while it is attached, so there is no problem even if it is attached for a long time, and useful ingredients in the moisturizing composition can be transferred to the skin for a long time. have.

At this time, the volatilization rate (%) is calculated from the initial state weight (A) filled with the moisturizing composition and the weight (B) measured after 1 hour at 23°C, and can be specifically calculated through Equation 1 below, At this time, the moisturizing composition is a mixture of Liponic EG-1, Lubrajel DV-Free, and DI in a weight ratio of 5:1:3.

[Equation 1]

Volatilization rate (%) = [(A-B)×100]/A

In addition, as another example, the skin adhesion layer 110 has a volatilization rate of 15% or less for 1 hour, and more preferably 9% or less, at 35° C., measured in a state in which the moisturizing composition is supported on the fibrous web, and the temperature is higher than room temperature. Even if the moisturizing composition is not easily volatilized even if it is directly attached to the high skin and exposed to the air, there is no problem even if it is attached for a long time, and useful ingredients in the moisturizing composition can be transferred to the skin for a long time.

The cosmetic patch 100 of the present invention may be manufactured in a suitable shape so as to be applicable under the eyes as shown in FIG. 1 as an example, but is not limited thereto, and may be manufactured to be attached to the entire face as shown in FIG. 2, or The present invention is not particularly limited with respect to the shape of the cosmetic patch because it can be manufactured in a conventional circle or polygon for the purpose of being attached to a wide surface of the skin such as the thigh or the like. In addition, as shown in FIGS. 3A to 3C, after the cosmetic patch is attached to the skin with the first cover layer removed, the second cover layer may be removed, and eventually only the skin attachment layer remains on the skin. As can be seen through, it adheres to the curved surface without flowing down, and since it is implemented in a thin thickness without flowing down of the moisturizing composition and there is no cover layer, the feeling of adhesion may hardly occur.

The present invention will be described in more detail through the following examples, but the following examples do not limit the scope of the present invention, which should be construed to aid understanding of the present invention.

<Example 1>

First, a fibrous web to be used for the skin adhesion layer was prepared. To prepare a fibrous web, polyvinylidene fluoride (Arkema, Kynar761) and polyurethane having a weight average molecular weight of 250,000 were mixed in a weight ratio of 3:7, and then the weight ratio of dimethylacetamide and acetone was 70: A spinning solution was prepared by dissolving in the mixed solvent mixed at 30 for 6 hours at a temperature of 80°C using a magnetic bar. Using an electrospinning device, the prepared spinning solution was applied on the second cover layer of a nonwoven fabric in an environment of 65% RH under the conditions of 25KV applied voltage, 25cm distance between the current collector and the spinneret, and 0.05ml/hole discharge amount, and 30℃. Electrospinning was carried out to obtain a fibrous web. Subsequently, the obtained fiber web was calendered twice at a temperature of 130° C. and a pressure of 4 kPa to have a three-dimensional network structure, a basis weight of 3 g/m 2, a thickness of 5 μm, an average pore diameter of 1.6 μm, and a fiber diameter of 300 nm. A phosphorus fiber web was prepared. At this time, the nonwoven fabric used as the second cover layer was made of polypropylene, had a basis weight of 20 g/m 2, a thickness of 220 μm, and an air permeability of 560 cfm.

Thereafter, the moisturizing composition was sprayed on the fibrous web and allowed to stand at room temperature for 15 minutes to prepare a skin adhesion layer. Then, a circular cosmetic patch having a diameter of 55pi was prepared by laminating the first cover layer, which is a nonwoven fabric, on the prepared skin adhesion layer. At this time, the nonwoven fabric used as the first cover layer was the same as the second cover layer. The content of the moisturizing composition in the prepared skin patch was 0.0509 g.

At this time, the moisturizing composition used was a viscosity of 580 cps, and the compound represented by Formula 1, Lubrajel DV-Free, and DI water were mixed in a weight ratio of 5: 1: 3, and the composition of Lubrajel DV-Free was It is shown in Table 1 below.

[Formula 1]

(In Formula 1, R ₁ , R ₂ and R ₃ are hydrogen, and x+y+z=26)

	CAS No.	weight%
water	7732-18-5	50 to 61
glycerin	56-81-5	36.5 ~ 44.6
Glyceryl acrylate/acrylic acid copolymer	56-81-5,9003-01-4	2.6 ~ 3.2
Phenoxyethanol; Ethylene glycol monophenyl ether; 2-phenoxyethanol	122-99-6	0.99 ~ 1.21

<Comparative Example 1>

0.0475 g of the same moisturizing composition was added to a container having the same plane area as the skin patch of Example 1.

<Experimental Example 1>

The skin patch according to Example 1 was attached to the surface of the container of the same size and type used in Comparative Example 1, and at this time, the surface of the fiber web was attached to the container surface. Thereafter, the amount of volatilization of the moisturizing composition was evaluated after allowing it to stand at room temperature at 23° C., and the results are shown in FIGS. 4 (Example 1), FIG. 5 (Comparative Example 1), and Table 2, respectively.

		Example 1	Comparative Example 1
Initial moisturizing composition content (g)		0.0509	0.0475
Remaining amount of moisturizing composition (g) / volatilization rate compared to initial period (%)	1 hour later	0.05009 (-1.7%)	0.0411 (-13.5%)
	2 hours later	0.0483 (-5%)	0.0393 (-16%)

As can be seen from Table 2,

In the case of the skin patch of Example 1, the content of the moisturizing composition volatilized after being left at room temperature for 2 hours was 5% or less, indicating that the volatilization rate was significantly lower than that of Comparative Example 1.

<Examples 2 to 5>

It was prepared in the same manner as in Example 1, but by changing the basis weight, thickness, average pore diameter, air permeability and/or the content of the moisturizing composition of the fiber web as shown in Table 3 below, a cosmetic patch as shown in Table 3 was prepared.

<Comparative Examples 2 to 3>

Prepared by carrying out the same as in Example 1, but prepared in the same manner as in Example 1, but by changing the basis weight, thickness, average pore diameter and/or air permeability of the fiber web as shown in Table 3 below, cosmetic patches as shown in Table 3 below. Was prepared.

<Comparative Examples 4 to 6>

A skin patch was prepared by obtaining a commercially available fibrous web as shown in Table 3 below, which is usually used as a beauty patch.

<Experimental Example 2>

The following physical properties were evaluated for the cosmetic patches of Examples 2 to 5 and Comparative Examples 2 to 6, and the results are shown in Table 3 below.

1. Semi-dry condition evaluation

Immediately after separating the first cover layer and the second cover layer of the prepared skin patch, the presence or absence of a moisturizing composition on the surface of the skin attachment layer was evaluated, and if there is a moisturizing composition that comes out ×, if there is no moisturizing composition that comes out, it is semi-dry. It was judged as a state and evaluated as (circle).

In addition, the prepared skin patch was sealed and left in a dark room at 23° C. for 50 days to evaluate the maintenance of the semi-dry state. Specifically, the content of the moisturizing composition on the surface of the skin attachment layer was evaluated immediately after separation of the first cover layer and the second cover layer of the skin patch after 50 days had elapsed. Specifically, after preparing an oil paper of the same size as the skin patch, it was attached to the skin adhesive layer immediately after the cover layer was separated for 1 second, then removed, and the area where the moisturizing composition was absorbed in the oil paper was measured. The area was calculated as a percentage. When the percentage of the calculated absorption area is 5% or less, it is expressed as ◎, when it is more than 5% and less than 10%, △ when it is more than 10% and less than 20%, and when it exceeds 20%, it is expressed as ×.

2. Volatilization characteristics of moisturizing composition

After 1 hour after attaching the fiber web part of the beauty patch on an aluminum plate maintained at a temperature of 35° C., the weight was measured to calculate the volatilization rate of the moisturizing composition that volatilized. At this time, the first cover layer and the second cover layer were both removed and measured.

3. Evaluation of adhesion after skin adhesion

3 hours after attaching the skin patch to the skin, the adhesion was evaluated. Specifically, if the skin adhesion layer was transparent and the skin adhesion condition was good ◎, the skin adhesion layer was attached to the skin but became slightly opaque. Case △ When it became opaque and detached from the skin, it was evaluated as x.

		Example 2	Example 3	Example 4	Example 5	Comparative Example 2	Comparative Example 3	Comparative Example 4	Comparative Example 5	Comparative Example 6
Fiber web	Fiber material	PVDF+PU	PVDF+PU	PVDF+PU	PVDF+PU	PVDF+PU	PVDF+PU	Tencel	PP	Rayon
	Fiber diameter	Less than 1㎛	Less than 1㎛	Less than 1㎛	Less than 1㎛	Less than 1㎛	1~1.5㎛	7~ 10㎛	15~28㎛	12~20㎛
	Basis weight (g/㎡)	3.3	10	10	15	10	10	40	30	55
	Thickness(㎛)	5	15	20	45	45	60	280	220	310
	Average pore diameter (㎛)	1.6	3.0	5.0	9.5	11.4	12.3	30~60	30~60	30~60
	Air permeability (cfm)	3	25	30	40	50	60	470	560	290
Moisturizing composition impregnation amount (g/㎡)		10	15	20	25	30	35	More than 40	More than 40	More than 40
Properties	Initial semi-dry state	○	○	○	○	○	○	×	×	×
	Maintainability in semi-dry state	◎	◎	○	○	△	×	×	×	×
	35℃ 1 hour volatilization rate (%)	7.8	8.9	11.1	14.9	22.9	25.7	60.5	63.1	55.4
	Adherence	◎	◎	◎	◎	△	△	×	×	×

As can be seen in Table 3,

In the case of Comparative Examples 3 to 5 using a conventional cosmetic patch, the initial state was not a semi-dry state, and accordingly, the volatilization rate of the moisturizing composition was greater than that of the example, and after a certain period of time, it was confirmed that there was no adhesion.

In addition, in the case of Comparative Example 1 and Comparative Example 2, it was initially in a semi-dry state, but the maintenance of the semi-dry state was deteriorated, and it can be seen that the volatilization rate and adhesion were also poor compared to the Example.

In contrast, in the case of the cosmetic patch according to the example, the surface of the initial skin adhesion layer was implemented in a semi-dry state, and it was excellent in maintaining the semi-dry state even in the storage stability evaluation for 30 days, and the volatilization rate at 35° C. for 1 hour was also small, so that it was excellent.

Although an embodiment of the present invention has been described above, the spirit of the present invention is not limited to the embodiment presented in the present specification, and those skilled in the art who understand the spirit of the present invention can add components within the scope of the same idea. It will be possible to easily propose other embodiments by changing, deleting, adding, etc., but it will be said that this is also within the scope of the present invention.

Claims (13)

1. A skin adhesion layer comprising a fiber web having an average pore diameter of 10 μm or less and an air permeability of 50 cfm or less, and a moisturizing composition filled in the pores of the fiber web;

   A first cover layer disposed on one surface of the skin adhesion layer; And

   Beauty patch comprising; a second cover layer disposed on the other surface of the skin adhesion layer.
2. The method of claim 1,

   The cosmetic patch, characterized in that after the first cover layer is removed and one surface of the exposed skin adhesion layer is applied to the skin, the second cover layer is separated from the skin adhesion layer.
3. The method of claim 1,

   The fiber web is a cosmetic patch, characterized in that the average pore diameter is 0.01 ~ 5㎛, air permeability is 0.3 ~ 50cfm.
4. The fiber web is a cosmetic patch, characterized in that the basis weight is 2.0 ~ 50g / ㎡, the thickness is 3 ~ 50㎛.
5. The method of claim 1,

   The fibrous web is a cosmetic patch, characterized in that it contains at least one elastic component selected from the group consisting of polyurethane, poly(methyl matacrylate) (PMMA) and polypyrole.
6. The method of claim 5,

   The fibrous web further includes at least one strength reinforcing component selected from the group consisting of polyvinylidene fluoride, polysulfone and polyethersulfone (PES), and the strength reinforcing component is 20 to 80% by weight based on the total weight of the fiber. Beauty patch, characterized in that included as.
7. The method of claim 4,

   Beauty patch, characterized in that the weight average molecular weight of the polyurethane is 50,000 ~ 300,000.
8. The method of claim 1,

   The moisturizing composition has a viscosity of 200 ~ 750cP, a cosmetic patch, characterized in that filled in the pores of the fiber web.
9. The method of claim 1,

   The fiber web is cosmetic patch, characterized in that formed of fibers having a diameter of less than 1㎛.
10. The method of claim 1,

    The cosmetic patch, characterized in that the adhesion between the second cover layer and the skin adhesion layer is greater than the adhesion between the first cover layer and the skin adhesion layer.
11. The method of claim 1,

    The first cover layer and the second cover layer are non-woven fabrics, each independently having a thickness of 10 to 100 μm and a basis weight of 10 to 50 g/m 2.
12. The method of claim 1,

    Cosmetic patch, characterized in that the content of the moisturizing composition is 6 ~ 20g / ㎡.
13. The method of claim 1,

    The fiber web is a cosmetic patch, characterized in that the basis weight is 2 ~ 10g / ㎡, the thickness is 2 ~ 20㎛, the average pore diameter is 0.2 ~ 5㎛.

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