Manufacturing method of gel-type decorative sheet

Abstract

To provide a manufacturing method of a gel-like cosmetic sheet capable of familiarizing a gel-like beauty material to the whole sheet base material.SOLUTION: A manufacturing method of a gel-like cosmetic sheet includes steps of (A) attaching a water-soluble polymer to a sheet base material Sc; and (B) impregnating essence Lc into the sheet base material after the step (A). In addition, the manufacturing method may further include a step of inserting the sheet base material into a package Zp, and in this case, the step (B) is performed after a step (C).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a method for producing a gel-type decorative sheet. [Background technology]

[0002] There are cosmetic sheets in which cosmetic materials are incorporated into a sheet substrate made of paper, woven fabric, nonwoven fabric, etc. (See, for example, Patent Document 1.) Among such cosmetic sheets, there are also gel-type cosmetic sheets that use gel-type cosmetic materials. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-156996 Summary of the Invention [Problem to be solved by the invention]

[0004] Conventionally, a method for manufacturing gel cosmetic sheets involves folding a sheet substrate and inserting it into a package, then filling the package with a gel cosmetic material, and then sealing the package. Therefore, the gel cosmetic material must have a low viscosity so that it can penetrate the entire folded sheet substrate. If a gel cosmetic material with a high viscosity is used, the above manufacturing method makes it difficult for the gel cosmetic material to penetrate inside the folded sheet substrate, and therefore makes it difficult to spread the gel cosmetic material throughout the entire sheet substrate.

[0005] SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a method for producing a gel cosmetic sheet that allows a gel cosmetic material to be applied to the entire sheet substrate. [Means for solving the problem]

[0006] The method for producing a gel cosmetic sheet according to the present invention comprises (A) a step of adhering a water-soluble polymer to a sheet substrate, and (B) a step of impregnating the sheet substrate with a cosmetic serum after step (A).

[0007] According to the above manufacturing method, by impregnating the sheet substrate with a beauty serum, the beauty serum penetrates the water-soluble polymer attached to the sheet substrate and gels, thereby producing a gel-like cosmetic material. Because the beauty serum has a lower viscosity than the gel (gel-like cosmetic material), it easily penetrates into the interior of the sheet substrate, even when the sheet substrate is folded. The speed at which the beauty serum penetrates is faster than the speed at which the water-soluble polymer transforms the beauty serum into a gel. Therefore, the beauty serum penetrates into the interior of the sheet substrate, thereby easily producing a gel-like cosmetic material inside the sheet substrate. In this way, by attaching the water-soluble polymer, which is the base of the gel, to the sheet substrate and then transforming the beauty serum into a gel using the water-soluble polymer, the gel-like cosmetic material is more easily absorbed into the entire sheet substrate than in conventional methods in which the gel-like cosmetic material is later absorbed into the sheet substrate. [Effects of the Invention]

[0008] According to the present invention, in a gel-type cosmetic sheet, it is possible to make the gel-type cosmetic material blend into the entire sheet substrate. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a flowchart showing a method for manufacturing a gel decorative sheet according to an embodiment. [Figure 2] FIG. 1 is a conceptual diagram showing an example of an application device for applying a water-soluble polymer to a nonwoven fabric. [Figure 3] 10A to 10C are conceptual diagrams sequentially illustrating an example of an insertion process. [Figure 4] 1 is a conceptual diagram showing an example of an impregnation step in sequence. DETAILED DESCRIPTION OF THE INVENTION

[0010] [1] Implementation Fig. 1 is a flowchart showing a method for manufacturing a gel-type decorative sheet according to an embodiment. Here, the gel-type decorative sheet is a sheet substrate to which a gel-type cosmetic material has been applied. In this embodiment, the method for manufacturing such a gel-type decorative sheet involves an adhering step, an inserting step, and an impregnation step, which are carried out in this order. Each step will be described in detail below.

[0011] [1-1] Adhesion process The adhesion step is a step of adhering the water-soluble polymer to the sheet substrate. Specifically, a dispersion liquid in which the water-soluble polymer is dispersed is applied to the sheet substrate, and the dispersion liquid is dried to adhere the water-soluble polymer to the sheet substrate.

[0012] In this embodiment, the sheet substrate is a continuous nonwoven fabric that has been cut into a predetermined shape by processing such as punching or trimming, and is produced by applying a water-soluble polymer to the nonwoven fabric and then cutting the nonwoven fabric into a predetermined shape. The material of the nonwoven fabric is not particularly limited, but examples thereof include natural fibers (paper, cotton, linen, wool, etc.), cellulosic fibers (rayon fiber, acetate fiber, etc.), polyethylene fibers, polypropylene fibers, polyurethane fibers, polyacrylic fibers, nylon fibers, polyvinyl chloride fibers, etc., used alone or in combination.

[0013] The water-soluble polymer used is, for example, a starch-sodium acrylate graft polymer, which is a starch-polyacrylic acid-based polymer. Starch-sodium acrylate graft polymers are less likely to form clumps when impregnated with a beauty serum in the impregnation process described below. However, if a certain amount of clumping is acceptable or if the problem can be resolved by adjusting the ingredients of the beauty serum, polymers other than starch-sodium acrylate graft polymers (e.g., carboxyvinyl polymer, xanthan gum, alkyl acrylate crosspolymer, etc.) can also be used as the water-soluble polymer.

[0014] The solvent for the dispersion liquid may be, for example, isopropyl alcohol (IPA) or ethanol. The dispersion liquid may also contain a thickener, a binder for fixing the water-soluble polymer to the sheet substrate, etc. Although not particularly limited, the thickener may be, for example, hydroxypropyl cellulose (HPC), and the binder may be, for example, polyvinylpyrrolidone (PVP).

[0015] Fig. 2 is a conceptual diagram showing an example of an applicator for applying a water-soluble polymer to a nonwoven fabric. In the example of Fig. 2, the applicator is an apparatus for applying a dispersion to a nonwoven fabric by gravure printing, and includes a container 11, a gravure plate roller 12, a doctor blade 13, and a pressure roller 14. In Fig. 2, the dispersion is indicated by the symbol Lp, and the nonwoven fabric is indicated by the symbol St.

[0016] A dispersion liquid Lp containing a water-soluble polymer dispersed therein is stored in a container 11. The gravure roller 12 is a plate roller having a plurality of depressions 12a formed on its circumferential surface. As the gravure roller 12 rotates, the dispersion liquid Lp adheres to its circumferential surface and fills the depressions 12a. A doctor blade 13 scrapes off excess dispersion liquid Lp adhering to the circumferential surface of the gravure roller 12. A pressure roller 14 presses the nonwoven fabric St, which has been passed between the gravure roller 12 and itself, against the circumferential surface of the gravure roller 12.

[0017] With this configuration of the applicator, the dispersion Lp in the depressions 12a is transferred to the nonwoven fabric St by sequentially feeding the nonwoven fabric St through between the gravure roller 12 and the pressure roller 14 as the gravure roller 12 rotates. This causes the dispersion Lp to be applied to the nonwoven fabric St, resulting in the water-soluble polymer adhering to the entire nonwoven fabric St. The method of applying the dispersion Lp is not limited to gravure printing, and may be changed as appropriate to a dipping method, a spraying method, or the like, depending on the material of the nonwoven fabric St and the amount of water-soluble polymer to be applied.

[0018] After the water-soluble polymer is applied, the nonwoven fabric St is dried. The drying temperature at this time is preferably about 75 to 95° C., and the drying time is preferably about 25 to 36 seconds.

[0019] The nonwoven fabric St is then cut into a predetermined shape by processes such as punching and trimming to form a sheet substrate Sc with the water-soluble polymer adhered to the entire surface. As an example, the nonwoven fabric St is cut into a shape for a two-dimensional face mask (see the upper left diagram in Figure 3). Note that the nonwoven fabric St may be cut into various shapes, not limited to the shape for a two-dimensional face mask.

[0020] In this embodiment, the water-soluble polymer is adhered to the sheet substrate Sc through two steps: applying the water-soluble polymer to the nonwoven fabric St and cutting the nonwoven fabric St. In the adhering step, the water-soluble polymer may be adhered to the sheet substrate Sc by directly applying the dispersion liquid Lp to the sheet substrate Sc that has been cut into a predetermined shape.

[0021] [1-2] Insertion process The insertion process is a process of inserting the sheet substrate Sc to which the water-soluble polymer is attached into a package. FIG. 3 is a conceptual diagram showing, as an example of the insertion process, the process of folding the sheet substrate Sc and inserting it into a package Zp in sequence. In the example of FIG. 3, the sheet substrate Sc (upper left diagram) cut into a shape for a two-dimensional face mask is folded along vertical fold lines Ma1 and Ma2 (upper right diagram, lower left diagram), and then folded along horizontal fold line Mb (lower center diagram). Note that the folding method of the sheet substrate Sc is not limited to the method shown in FIG. 3 and may be changed as appropriate depending on the shape and size of the sheet substrate Sc.

[0022] Then, the folded sheet substrate Sc is inserted into the package Zp (lower right diagram) as shown in the lower right diagram of Fig. 3. The sheet substrate Sc may also be inserted into the package Zp as is without being folded.

[0023] [1-3] Impregnation process The impregnation process is a process of impregnating the sheet substrate Sc with a beauty serum. FIG. 4 is a conceptual diagram showing an example of the impregnation process in sequence. As shown in the example of FIG. 4, in the impregnation process, the beauty serum Lc is poured into the package Zp (left diagram), and then the opening of the package Zp is sealed (center diagram). In this way, in the impregnation process, the sheet substrate Sc is impregnated with the beauty serum Lc within the package Zp (right diagram of FIG. 4).

[0024] According to the manufacturing method of this embodiment, the sheet substrate Sc is impregnated with the beauty serum Lc, which then permeates the water-soluble polymer attached to the sheet substrate Sc, gelling the beauty serum Lc and producing a gel-like cosmetic material. Because the beauty serum Lc has a lower viscosity than a gel (a gel-like cosmetic material), it easily penetrates into the interior of the sheet substrate Sc, even when the sheet substrate Sc is folded. The beauty serum Lc penetrates faster than the water-soluble polymer converts the beauty serum Lc into a gel. Therefore, the beauty serum Lc penetrates into the interior of the sheet substrate Sc, which makes it easier to produce a gel-like cosmetic material inside the sheet substrate Sc. By first attaching the water-soluble polymer, which is the gel base, to the sheet substrate Sc and then converting the beauty serum Lc into a gel using the water-soluble polymer, the gel-like cosmetic material is more easily absorbed into the entire sheet substrate Sc than in conventional methods in which the gel-like cosmetic material is subsequently absorbed into the sheet substrate Sc.

[0025] Furthermore, since the gel-type cosmetic material is absorbed into the entire sheet substrate Sc in this way, the sheet substrate Sc is less likely to dry out during use, and its adhesion to the skin is improved.Furthermore, the gel-type cosmetic material can contain a large amount of cosmetic ingredients, making it possible to obtain high cosmetic effects.

[0026] [2] Example <Sheet substrate> The sheet substrate Sc has a basis weight of 30 g / m 2 More than 100g / m 2 It is preferable that the weight is 30 g / m or less. 2If the weight is less than 100 g / m, the strength of the sheet substrate Sc will be weakened, and problems such as tearing of the sheet substrate Sc during processing or use will be more likely to occur. 2 If it is larger, the repulsive force of the sheet substrate Sc becomes strong, which may cause problems such as making it difficult to perform the folding process required for folding.

[0027] <Water-soluble polymer> It is preferable that the particle size of the water-soluble polymer be 13 μm or less (see Tables 1 and 2). This is because if the particle size is larger than 13 μm, the gel-like cosmetic material obtained by impregnating the water-soluble polymer with the cosmetic serum Lc becomes opaque and is prone to problems such as powder formation (see Table 2).

[0028] [Table 1]

[0029] [Table 2]

[0030] The amount of water-soluble polymer attached to the sheet substrate Sc is 0.6 g / m 2 More than 2.0g / m 2 It is preferable that the coating amount is 0.6 g / m or less (see Tables 1 and 3). 2 If the applied amount is less than 2.0 g / m, problems such as the water-soluble polymer not gelling even when impregnated with the beauty serum Lc are likely to occur (see Table 3). 2 If it is larger, the viscosity of the gel-type cosmetic material will be too high, which can lead to problems such as stickiness and a poor user experience (see Table 3).

[0031] Furthermore, the water-soluble polymer is 0.6 g / m 2 More than 2.0g / m 2 It is preferable that the adhesive be attached to both sides of the sheet substrate Sc in the following amounts.

[0032] [Table 3]

[0033] <Beauty serum> The amount of serum Lc poured into the package Zp is preferably between 12 and 17 times the amount of the sheet substrate Sc (see Tables 1 and 4). This is because the serum Lc is more likely to penetrate appropriately throughout the entire sheet substrate Sc within the package Zp. On the other hand, if the amount of serum Lc is less than 12 times, problems such as the serum Lc not penetrating to the inside of the folded sheet substrate Sc (see FIG. 3) are likely to occur (see Table 4). On the other hand, if the amount of serum Lc is more than 17 times, the amount of serum Lc is too much, which is likely to cause problems such as the serum Lc dripping during use (see Table 4).

[0034] [Table 4]

[0035] The viscosity of the serum Lc injected into the package Zp should preferably be between 1000 mPa·s and 2000 mPa·s (see Tables 1 and 5). This is because if the viscosity is less than 1000 mPa·s, the serum Lc may not gel even when impregnated into the water-soluble polymer (see Table 5). On the other hand, if the viscosity is greater than 2000 mPa·s, the serum Lc may not penetrate deep into the folded sheet substrate Sc (see Figure 3). However, in the penetrated areas, the viscosity of the gel-like cosmetic material may become too high, causing stickiness and other problems that make the product uncomfortable to use (see Table 5).

[0036] [Table 5]

[0037] The above-described embodiments and examples should be considered to be illustrative in all respects and not restrictive. The scope of the present invention is defined by the claims, not by the above-described embodiments and examples. Furthermore, the scope of the present invention is intended to include all modifications within the meaning and scope of the claims.

[0038] For example, the manufacturing method of the gel cosmetic sheet described above may be modified to one that does not require an insertion step (such as by directly applying the beauty serum Lc to the sheet substrate Sc to which the water-soluble polymer has been attached and allowing it to penetrate), and such manufacturing methods are also included in the present invention. [Explanation of symbols]

[0039] 11 Container 12 Gravure version of Laura 12a Depression 13 Doctor Blade 14 Pressure roller Lc serum Lp dispersion Ma1, Ma2, Mb fold lines Sc sheet substrate St Non-woven fabric Zp Package

Claims

1. (A) forming a sheet substrate having a water-soluble polymer attached in a dry state that gels upon absorbing a beauty serum; (B) after the step (A), inserting the sheet substrate into a package; (C) after step (B), injecting the beauty serum into the package to impregnate the sheet substrate with the beauty serum within the package; A method for producing a gel-type decorative sheet, comprising:

2. In the step (A), the amount of the water-soluble polymer attached to the sheet substrate is 0.6 g / m ２ 2.0g / m or more ２ The method for producing a gel-type decorative sheet according to claim 1 , wherein the water-soluble polymer is adhered to the sheet substrate in the following manner.

3. 3. The method for producing a gel-type decorative sheet according to claim 1 or 2, wherein in step (A), the water-soluble polymer is adhered to the sheet substrate by applying a dispersion liquid in which the water-soluble polymer is dispersed to the sheet substrate.

4. 4. The method for producing a gel-type decorative sheet according to claim 3, wherein in step (A), the dispersion is applied to the sheet substrate by gravure printing or dipping.

5. 5. The method for producing a gel cosmetic sheet according to claim 1, wherein in step (C), the cosmetic serum used has a viscosity of 1000 mPa·s or more and 2000 mPa·s or less before being impregnated into the sheet substrate.

6. A method for manufacturing a gel cosmetic sheet as described in any of claims 1 to 5, wherein in step (C), the beauty serum used is one that penetrates into the sheet substrate faster than the speed at which the water-soluble polymer gels upon absorption of the beauty serum.

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