KR102442515B1 - Cosmetic sheet - Google Patents

Abstract

According to one embodiment of the present invention, a cosmetic sheet is provided. The cosmetic sheet comprises: a base sheet configured to allow at least one region thereof to be subjected to a hydrophobic treatment; and a hydrogel layer that is formed by laminating a hydrogel composition on the top side of the base sheet. The hydrogel layer may be formed to overlap at least a portion of the base sheet by being configured to allow at least a portion of the region of the base sheet having been subjected to a hydrophobic treatment to be impregnated with at least a portion of the hydrogel composition.

Description

Beauty sheet {COSMETIC SHEET}

The present invention relates to a cosmetic sheet.

Hydrogel is a material that can contain 20 to 90% of water, and due to its high moisture content, not only cosmetic fields such as mask packs, but also wound dressings, contact lenses, drug delivery media, and medical fields such as implants. has been applied in various fields.

In the case of a mask pack using a hydrogel, conventionally, a product in which a mask sheet of a certain thickness is formed by curing a hydrogel containing a cosmetic component alone has been developed. These products have the advantage that they do not require a composition other than the hydrogel, but when the thickness of the mask sheet is thin, it is easily torn by an external force, and if the thickness is increased to compensate for this, there is a problem that the wearability is deteriorated, and also due to the hydrolysis phenomenon Due to this, there was also a problem in that excessive moisture may flow down.

In order to compensate for this problem, a type of mask pack product in which a hydrogel is coated and cured on one surface of the nonwoven fabric has been introduced. In the case of such a product, since the nonwoven fabric functions as a support, there is an advantage in that the hydrogel can be easily torn.

However, in the process of coating the hydrogel, a synthetic resin (PET, etc.) film must be additionally attached to the back side of the nonwoven fabric to prevent the hydrogel from penetrating the nonwoven fabric and leaking to the back side, so the thickness of the mask pack product becomes thick. There was a problem. In addition, in actual use, since the synthetic resin film must be removed due to a foreign feeling, there is a limit that cannot effectively prevent the hydrogel from leaking to the back surface of the nonwoven fabric.

An object of the present invention is to provide a beauty sheet for solving the above problems.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

A cosmetic sheet is provided according to an embodiment of the present invention. The cosmetic sheet may include: a base sheet in which at least one region is hydrophobically treated; and a hydrogel layer formed by laminating a hydrogel composition on an upper portion of the base sheet, wherein the hydrogel layer is impregnated to at least a portion of the hydrophobic treated region of the base sheet in which at least a portion of the hydrogel composition is impregnated , It may be formed to overlap at least a part of the base sheet.

In addition, the hydrogel layer, a first hydrogel layer formed to overlap the base sheet; and a second hydrogel layer that is continuous with the first hydrogel layer and is formed on the outside of the base sheet.

In addition, the base sheet may include a non-impregnated region in which the hydrogel composition is not included below the hydrogel layer.

In addition, the non-impregnated region may be formed by limiting the penetration depth of the hydrogel composition by the hydrophobic treated region of the base sheet.

In addition, the non-impregnated region may at least partially overlap the hydrophobic treated region of the base sheet.

In addition, the non-impregnated region may be formed under the base sheet.

In addition, at least one of the base sheet and the hydrogel layer may include at least one of an herbal extract and a raw material.

According to an embodiment of the present invention, a method for manufacturing a cosmetic sheet is provided. The manufacturing method comprises the steps of providing a base sheet; hydrophobically treating at least one region of the base sheet; and laminating a hydrogel composition on top of the base sheet to form a hydrogel layer, wherein at least a portion of the hydrogel composition is impregnated to at least a portion of the hydrophobically treated region of the base sheet. As such, it may be formed so that at least a portion of the base sheet overlaps.

According to the present invention, the hydrogel composition is impregnated into the base sheet to form a hydrogel layer, but by hydrophobic treatment of the upper portion of the base sheet to limit the penetration depth of the hydrogel, the hydrogel composition in the process of forming the hydrogel layer is the base It can penetrate the sheet so that it does not leak to the outside.

In addition, according to the present invention, since there is no need to form a thick base sheet to prevent leakage of the hydrogel composition, it is possible to manufacture a thinner cosmetic sheet than conventional products.

In addition, according to the present invention, when the cosmetic sheet is applied to the skin, it is possible to effectively prevent moisture, functional ingredients, etc. contained in the hydrogel layer from leaking through the opposite side of the cosmetic sheet.

In order to more fully understand the drawings recited in the Detailed Description of the Invention, a brief description of each drawing is provided.
1 shows a cross-sectional view of a cosmetic sheet according to an embodiment of the present invention.
Figure 2 shows the base sheet before the hydrogel layer is formed in the cosmetic sheet according to the embodiment of the present invention.
Figure 3 shows a flowchart for explaining a method of manufacturing a cosmetic sheet according to an embodiment of the present invention.

Hereinafter, exemplary embodiments according to the present invention will be described in detail with reference to the contents described in the accompanying drawings. In addition, a method of constructing and using an embodiment of the present invention will be described in detail with reference to the contents described in the accompanying drawings. The same reference numbers or reference numerals in each figure indicate parts or components that perform substantially the same functions. For convenience described below, the up, down, left and right directions are based on the drawings, and the scope of the present invention is not necessarily limited to that direction.

Terms including an ordinal number, such as first, second, etc., may be used to describe various elements, but the elements are not limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be named as the first component, and similarly, the first component may also be referred to as the first component. and/or includes a combination of a plurality of related items or any one of a plurality of related items.

The terms used herein are used to describe the embodiments, and are not intended to limit and/or limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In this specification, the terms include or have is intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features, number, or step , it should be understood that it does not preclude in advance the possibility of the presence or addition of an operation, component, part, or combination thereof.

Throughout the specification, when a part is said to be connected to another part, it includes not only a case in which it is directly connected, but also a case in which it is indirectly connected with another element interposed therebetween. Also, when it is said that a part includes a certain component, this means that other components may be further included, rather than excluding other components, unless otherwise stated.

Figure 1 shows a cross-sectional view of a cosmetic sheet according to an embodiment of the present invention, Figure 2 shows a base sheet before the hydrogel layer is formed in the cosmetic sheet according to an embodiment of the present invention.

1 and 2 , the cosmetic sheet 100 may include a base sheet 110 and a hydrogel layer 120 .

The base sheet 110 may be formed in the form of a sheet having a predetermined thickness by physically entangled with each other. For example, the base sheet 110 may be a non-woven fabric, and may be formed by mixing one or more fibers to form a web, and physically entangling the fibers by a spun-lace process or the like. . However, this manufacturing method is exemplary, and various methods may be applied depending on the embodiment.

In an embodiment, the fibers constituting the base sheet 110 may be selected from the group consisting of synthetic fibers, regenerated fibers, biodegradable fibers, and mixtures thereof. For example, the fibers include synthetic fibers such as PE (polyethylene) and PP (polypropylene), natural fibers of vegetable or animal origin such as cotton fibers, hemp fibers, wool fibers, silk fibers, rayon fibers, cupra fibers, It is one of natural-derived biodegradable fibers, such as regenerated fibers such as lyocell fibers and microfiber fibers, seaweed fibers, chitosan fibers, and cellulose fibers, or two or more of these fibers may be mixed.

In an embodiment, the fibers constituting the base sheet 110 may be disposed at a density within a predetermined range. For example, the fibers constituting the base sheet 110 are 40 to 140 gsm, 50 to 130 gsm, 50 to 120 gsm, 50 to 110 gsm, 50 to 100 gsm, 50 to 70 gsm, or 80 to 100 gsm. Here, the areal density may mean a mass per unit area (g/m2). As described in detail below, the base sheet 110 may be hydrophobically treated by a hydrophobic material, or may be impregnated with a hydrogel composition forming the hydrogel layer 120 on the inside, if the density of the fibers is too low, a hydrophobic material And/or the hydrogel composition cannot be fixed to the base sheet 110, and if the density is too high, it may be difficult to penetrate the hydrophobic material and/or the hydrogel composition. Accordingly, the density of fibers constituting the base sheet 110 may be limited to a certain range to be suitable for hydrophobic treatment and formation of the hydrogel layer 120 .

In an embodiment, fibers constituting the base sheet 110 may be disposed with different densities from each other in at least one region. For example, the base sheet 110 may include a low-density first density region and a high-density second density region, and may have a structure in which the first density region and the second density region are sequentially disposed. In addition, the first density region and the second density region may be repeatedly arranged to form a stripe structure, but the present invention is not limited thereto. As such, the base sheet 110 may form a structure in which a low-density region and a high-density region are sequentially disposed, and in particular, a high-density region may be disposed on the hydrophobic-treated base sheet 110 .

At least one region of the base sheet 110 may be hydrophobically treated in a predetermined manner to form a hydrophobic treatment region 111 . For example, the hydrophobic treatment is performed by absorbing (or impregnating) the hydrophobic material between the fibers constituting the base sheet 110, or by configuring at least one region of the base sheet 110 with hydrophobic fibers. can be The hydrophobic material is a material having water-repellent properties, and for example, various types of materials known in the art such as silicone-based, fluorine-based, wax (WAX)-based materials that are harmless to users and can be used for cosmetic production may be applied.

In an embodiment, the hydrophobic treatment region 111 may be formed in at least one region including the upper end of the base sheet 110 . For example, the hydrophobic treatment region 111 may be formed by a predetermined thickness downward from the top surface of the base sheet 110 . In this case, the hydrophobic treatment may be performed in such a way that a hydrophobic material is applied to the top surface of the base sheet 110 so that the hydrophobic material is absorbed into the inner side of the base sheet 110 . However, this is an example, and depending on the embodiment, the hydrophobic treatment region 111 may be formed over the middle region or upper and/or lower portion of the base sheet 110 , or over the entire base sheet 110 .

In an embodiment, the hydrophobic treatment region 111 may serve to limit the penetration depth of at least a portion of the hydrogel composition. Specifically, when the hydrogel composition is laminated on the top of the base sheet 110 to form the hydrogel layer 120, at least a portion of the hydrogel composition (eg, moisture) is inside the base sheet 110 . The hydrogel composition containing a large amount of moisture due to the presence of the hydrophobic treatment region 111 may be permeable only to a portion of the hydrophobic treatment region 111 . Through this, the hydrogel composition can pass through the base sheet 110 and flow out to the outside. That is, the hydrophobic treatment region 111 may act as a kind of blocking film that prevents the hydrogel composition (especially, moisture) from leaking.

In an embodiment, the base sheet 110 may include a non-impregnated region 112 . Here, the non-impregnated region 112 refers to a region in which the hydrogel composition is not included (or impregnated). This non-impregnated region 112 is disposed on the lower side of the hydrogel layer 120 because, in the process of forming the hydrogel layer 120 , the penetration depth of the hydrogel composition is limited by the hydrophobic treatment region 111 . However, the hydrophobic treatment region 111 and at least a part may be formed to overlap.

In an embodiment, the base sheet 110 may be formed to a thickness of 0.01 to 10 mm. When the thickness of the base sheet 110 is smaller than the above range, the formation of the hydrogel layer 120 is difficult, and when the thickness of the base sheet 110 is larger than the above range, adhesion with the skin may be poor.

The hydrogel layer 120 may be formed by laminating a hydrogel composition on top of the base sheet 110 so that at least a portion of the hydrogel composition is impregnated in the base sheet 110, and curing it. The hydrogel layer 120 may contact the user's skin to deliver functional ingredients to the skin.

Here, the hydrogel composition is a material having a high water content that can contain a large amount of water, and a gelling agent (eg, a natural polymer material such as carrageenan, sodium alginate), skin care It may contain a functional ingredient that imparts a function, etc., a preservative (eg, paraoxy-acid esters, phenoxyethanol, imidazolidinyl urea, natural preservatives such as phenonib), water, and the like.

In an embodiment, the hydrogel layer 120 may include a first hydrogel layer 121 and a second hydrogel layer 122 . The first hydrogel layer 121 is a region formed to overlap with the base sheet 110, and the hydrogel composition is formed by the hydrophobic treatment region 111 to the inside of the base sheet 110 by a certain depth (for example, up to at least a portion of the hydrophobic treatment region 111). In addition, the second hydrogel layer 122 is continuous with the first hydrogel layer 121 , and may be formed on the outside of the base sheet 110 without overlapping with the base sheet 110 .

In an embodiment, the hydrogel layer 120 may be formed to a thickness of 0.01 to 10 mm.

In an embodiment, at least one of the base sheet 110 and the hydrogel layer 120 may include an herbal extract and/or a raw material.

Here, the oriental herbal extract is obtained by physically and/or chemically processing oriental herbal ingredients to extract active ingredients therefrom, and may include at least one ingredient that provides cosmetic effects such as moisturizing, whitening, and regeneration to the skin. For example, oriental medicinal ingredients include eoseongcho, baeja, mulberry bark, goji mulberry, gardenia, astragalus, omija, gold, cinnamon, chaff vinegar, angelica, bellflower, loofah, ginkgo biloba, ginger, maekmundong, mung bean, goji berry, wormwood, baekryeoncho, jihwang , cheongung, peony, licorice, hwangryeon, yulpi, bokbunja, casualty, tosaja, chrysanthemum, old ginseng, gold and silver flower, white paper, Yeongyo, eugeunpi, self-inflicted ginseng, ginseng, ginseng, sauerio, red ginseng, ginseng, yulmu, turmeric, sansuyu, galgeun, baekchul , bokryeong, mate, arrowroot, etc. may include, but is not limited thereto.

In addition, the raw material may be a dried product or pulverized product of at least one of leaves, fruits, rinds, stems, and roots of plants. For example, the raw material may be freeze-dried rinds (dermis) of various varieties of tangerines, such as citrus fruits such as Hallabong, Cheonhyehyang, and Redhyang, and citrus fruits such as Noji citrus and kumquat, and then pulverized to a certain size. However, the present invention is not limited thereto, and the raw material 30 is dried and/or pulverized by various plants having active ingredients, such as oriental medicinal herbs such as mugwort, eoseongcho, motherwort, or petals such as rose flower, mulberry flower, marigold, etc. can be formed.

In an embodiment, the base sheet 110 may fix the original material to the inside by physical entanglement of the fibers constituting it.

For example, the base sheet 110 may be manufactured by physically bridging the first web including the first fibers and the second web including the second fibers, and in the manufacturing process of the base sheet 110 , the raw material may be fixed to the inside of the base sheet 110 . Specifically, the raw material is dispersed on the upper side of the first web, the second web is laminated on the upper side thereof, and the first fiber and the second fiber wrap the raw material from the outside through a spun-lace process or the like. While being physically entangled and/or entangled with each other, the original material can be fixed on the inside of the single-layer base sheet 110 .

The beauty sheet 100 and the base sheet 110 shown in FIGS. 1 and 2 are exemplary, and various configurations may be applied according to the embodiment to which the present invention is applied.

Figure 3 shows a flowchart for explaining a method of manufacturing a cosmetic sheet according to an embodiment of the present invention.

The manufacturing method 300 includes the steps of providing the base sheet 110 (S310), hydrophobically treating at least one region of the base sheet 110 (S320), and forming the hydrogel layer 120 (330) may include.

In step S310, the base sheet 110 may be provided. The base sheet 110 may be formed in a sheet form by physically entangling fibers with each other. In an embodiment, the base sheet 110 may be a non-woven fabric. For example, the base sheet 110 may be formed by forming a web by mixing one or more types of fibers, and physically entangling the fibers by a spun-lace process or the like.

In step S320 , the hydrophobic treatment region 111 may be formed on the base sheet 110 by hydrophobically treating at least one region of the base sheet 110 in a predetermined manner. For example, by applying a hydrophobic material to the upper surface of the base sheet 110 , the hydrophobic material is absorbed into the inner side of the base sheet 110 , and the hydrophobic treatment region 111 is formed on the upper surface of the base sheet 110 . It can be formed by a predetermined thickness from the lower side.

In step S330 , the hydrogel layer 120 may be formed on the base sheet 110 . For example, by applying the hydrogel composition to the upper portion of the base sheet 110, at least a portion of the hydrogel composition is impregnated to the inside of the hydrophobic treatment region 111 formed on the upper portion of the base sheet 110 by a certain depth. have. Then, by curing the hydrogel composition, the hydrogel layer 120 may be formed in a form in which at least a portion of the base sheet 110 is overlapped. In step S330 , it is possible to prevent the hydrogel composition from penetrating the base sheet 110 by the hydrophobic treatment region 111 and from leaking to the outside.

Hereinafter, the present invention will be described in more detail by way of Examples and Comparative Examples. However, the following Examples and Experimental Examples are merely illustrative of the present invention, and the content of the present invention is not limited to the following Examples and Experimental Examples.

Experimental Example 1: Moisture transfer test

As shown in Table 1, the base sheets of Examples 1 to 3 were prepared by hydrophobically treating the nonwoven fabric with different concentrations of hydrophobic material according to the present invention. In addition, Comparative Examples in which the hydrophobic treatment was not performed on the same nonwoven fabric were prepared in the same size and thickness as Examples 1 to 3.

Example 1 Example 2 Example 3 comparative example Nonwoven areal density (GSM) 25 25 25 25 Hydrophobic material type silicon silicon silicon - Hydrophobic substance concentration (%) 0.01 0.1 One -

Then, the hydrogel composition was laminated to a thickness of 1.5 mm (34GSM) on each of the upper sides of the sheets according to Examples 1 to 3 and Comparative Examples, and the moisture movement distance in the nonwoven fabric according to the capillary action was measured for 20 minutes.

Example 1 Example 2 Example 3 comparative example Moisture movement distance (mm) 240 120 0 260

As shown in Table 2, it can be seen that in Examples 1 to 3, the movement distance of moisture according to the capillary phenomenon is small for the same time period as compared to Comparative Examples. Through this, it can be seen that when hydrophobic treatment is performed on the nonwoven fabric as in Examples 1 to 3, the penetration depth of the hydrogel composition (especially, moisture) can be constantly limited in the manufacturing process of the cosmetic sheet.

Experimental Example 2: Moisture absorption experiment of beauty sheet

According to the present invention, a hydrogel composition is laminated to a thickness of 1.5 mm (34GSM) on a nonwoven fabric (25GSM) treated with 0.1% silicone according to the present invention to prepare a cosmetic sheet of an embodiment, and a no-mesh type hydrogel sheet without a base sheet A comparative example was prepared to a thickness of 1.5 mm.

Then, Examples and Comparative Examples were immersed in distilled water for 30 minutes, and the weight change before and after immersion was calculated as a percentage to measure the water absorption capacity of each of Examples and Comparative Examples.

Example comparative example absorptivity(%) 54.5 10.4

As shown in Table 3, it can be seen that the Example has a higher water absorption than the Comparative Example. That is, in the case of the embodiment, the sheet of the same area may be filled with more moisture and/or cosmetic liquid and provided to the user.

Experimental Example 3: Moisture evaporation experiment of beauty sheet

After preparing the cosmetic sheets of the same Examples and Comparative Examples as in Experimental Example 2, the Examples and Comparative Examples were immersed in distilled water for 30 minutes, and then left at room temperature for 6 hours. The moisture evaporation rate of each and Comparative Example was measured.

Example comparative example 20 minutes evaporation rate (%) 2.5 5.1 3 hours evaporation rate (%) 27.0 34.0 6 hours evaporation rate (%) 43.6 53.9

The evaporation rate may mean a ratio of the cosmetic liquid that is not transferred to the skin and evaporates into the air among the liquid cosmetics filled in the cosmetic sheet. As shown in Table 4, it can be seen that the Example shows a lower evaporation rate than the Comparative Example.

When examining Experimental Example 2 and Experimental Example 3 together, it can be seen that, while a larger amount of liquid is absorbed in Example compared to Comparative Example, a smaller amount of liquid is evaporated. That is, the Example can be seen to have a higher delivery efficiency of the cosmetic solution than the Comparative Example.

Experimental Example 4: Tensile test of beauty sheet

The cosmetic sheets of Examples and Comparative Examples identical to those of Experimental Example 2 were prepared, and the tensile length and tensile modulus before the sheet was broken by pulling the Examples and Comparative Examples with the same force were measured.

Example comparative example Tensile length (mm) 55 35 Tensile rate (%) 73 47

As shown in Table 5, it can be seen that the Example has a greater tensile length and tensile modulus than the Comparative Example. That is, it can be seen that the Example can effectively prevent the sheet tearing problem by the force applied to the beauty sheet in the course of use compared to the Comparative Example.

Experimental Example 5: Adhesion test of beauty sheet

The cosmetic sheets of Examples and Comparative Examples identical to those of Experimental Example 2 were prepared, and the hydrogel parts of Examples and Comparative Examples were attached to a smooth surface with a small coefficient of friction, and then, as time elapsed at an angle of 90 degrees, Examples and Comparative Examples, respectively The length of this sliding movement was measured.

Example comparative example 20 min travel length (mm) 6 130 1 hour travel length (mm) 7 253 2 hours travel length (mm) 7 255

As shown in Table 6, it can be seen that the Example has a greater surface adhesion than the Comparative Example. That is, in the embodiment, since the nonwoven fabric, which is the base sheet, holds the shape of the hydrogel layer, it is possible to maintain high adhesion even after the user's wearing time elapses.

Experimental Example 6: Evaluation of beauty sheets

A beauty sheet of the same Example and Comparative Example as in Experimental Example 2 was prepared, and the beauty sheet according to the Example and Comparative Example was worn by a user, and then an evaluation test was conducted.

Evaluation items Example comparative example adhesion +++ + moisturizing +++ + vitality ++ + activity +++ + preference +++ + Criteria: +++: Very good; ++: Excellent; +: Normal

As described above, it can be seen that the Examples received high evaluations for the Comparative Examples in all areas of adhesion, moisturizing, lasting power, activity and preference. In particular, it can be seen that by preventing evaporation or syneresis of the hydrogel composition through hydrophobic treatment in the embodiment, it provides improved moisturizing and lasting power compared to the existing cosmetic sheet (Comparative Example).

As described above, although the embodiments have been described with reference to the limited embodiments and drawings, various modifications and variations are possible from the above description by those skilled in the art. For example, the described techniques are performed in an order different from the described method, and/or the described components of the system, structure, apparatus, circuit, etc. are combined or combined in a different form than the described method, or other components Or substituted or substituted by equivalents may achieve an appropriate result. In addition, each embodiment may be operated in combination with each other as needed. Therefore, other implementations, other embodiments, and equivalents to the claims are also within the scope of the following claims.

100: beauty sheet 110: base sheet
111: hydrophobic treatment region 112: non-impregnated region
120: hydrogel layer 121: first hydrogel layer
122: second hydrogel layer

Claims (8)

As a beauty sheet,
at least one area of the base sheet is hydrophobically treated; and
Comprising a hydrogel layer formed by laminating a hydrogel composition on top of the base sheet,
The hydrogel layer is formed such that at least a portion of the hydrogel composition is impregnated to at least a portion of the hydrophobic treated region of the base sheet, so that at least a portion overlaps with the base sheet,
The base sheet includes a non-impregnated region that does not contain the hydrogel composition under the hydrogel layer,
The non-impregnated region is formed by limiting the penetration depth of the hydrogel composition by the hydrophobic treated region of the base sheet,
The non-impregnated region, at least partially overlapping the hydrophobic treated region of the base sheet. The method of claim 1,
The hydrogel layer,
a first hydrogel layer formed to overlap the base sheet; and
Continuous with the first hydrogel layer, the cosmetic sheet comprising a second hydrogel layer formed on the outside of the base sheet. delete delete delete The method of claim 1,
wherein the non-impregnated region is formed under the base sheet. The method of claim 1,
At least one of the base sheet and the hydrogel layer comprises at least one of an herbal extract and a raw material, a cosmetic sheet. A method for manufacturing a beauty sheet, comprising:
providing a base sheet;
hydrophobically treating at least one region of the base sheet; and
Laminating a hydrogel composition on top of the base sheet to form a hydrogel layer,
In the step of forming the hydrogel layer,
The hydrogel layer is formed such that at least a portion of the hydrogel composition is impregnated to at least a portion of the hydrophobic treated region of the base sheet, so that at least a portion overlaps with the base sheet,
In the base sheet, by limiting the penetration depth of the hydrogel composition by the hydrophobic treated region of the base sheet, a non-impregnated region that does not contain the hydrogel composition is formed below the hydrogel layer,
and the non-impregnated region overlaps at least partially with the hydrophobic treated region of the base sheet.

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