Cosmetic puff

Abstract

To provide a high-performance cosmetic puff which can be recycled as raw materials and has good feel on the skin. [Solution] A cosmetic puff (10) made of a porous flexible sheet, characterized in that the outermost periphery of the periphery has a linear pressed-through ridge (6) and the cross section of the periphery has a rounded shape.

Description

[Technical Field]

[0001] This invention relates to a cosmetic puff made of a porous, flexible sheet, which is recyclable and has a pleasant feel against the skin. [Background technology]

[0002] Conventionally, cosmetic puffs made of rubber-elastic sponges or porous materials have been known as applicators for cosmetic foundations. For example, NBR (acrylonitrile butadiene rubber), SBR (styrene butadiene rubber), and NR (natural rubber) are known as materials for rubber-elastic sponges.

[0003] For example, Patent Documents 1 and 2 disclose a technique for forming a rounded portion near the edge of a cosmetic puff without sewing or polishing, by applying a predetermined amount of heat to the area where the edge of the cosmetic puff is to be formed during the die-cutting process. It is stated that such a configuration can provide a high-performance cosmetic puff with a good feel against the skin. [Prior art documents] [Patent Documents]

[0004] [Patent Document 1] Utility Model Registration No. 3218970 Gazette [Patent Document 2] Japanese Patent Publication No. 2020-5684 [Overview of the Initiative] [Problems that the invention aims to solve]

[0005] However, when manufacturing cosmetic puffs using rubbers such as NBR, SBR, and NR as raw materials, the raw rubber undergoes chemical modification through vulcanization during the manufacturing process. For this reason, it is difficult to recover and recycle the raw rubber using the conventional cosmetic puff manufacturing method described above.

[0006] This invention was made to solve the above-mentioned problems, and aims to provide a high-performance cosmetic puff that is recyclable and has a good feel against the skin. [Means for solving the problem]

[0007] Based on the above findings, the present invention is defined in the following (1) to (16). (1) A cosmetic puff made of a porous, flexible sheet, A cosmetic puff characterized by having linear cuts along the outermost edge of its periphery, and the cross-section of the periphery having a rounded shape. (2) The cosmetic puff according to (1), characterized in that the flexible sheet is one sheet. (3) The cosmetic puff according to (1), characterized in that the flexible sheet is made up of multiple sheets. (4) The cosmetic puff according to (1), characterized in that the flexible sheet consists of two sheets. (5) The cosmetic puff according to (3), characterized in that a flexible filling is provided between the plurality of flexible sheets. (6) The cosmetic puff according to (5), characterized in that a hot melt sheet is provided between the flexible sheet and the flexible filling, and the flexible sheet and the flexible filling are bonded together by the hot melt sheet. (7) The cosmetic puff according to (3), characterized in that a cavity is provided between the plurality of flexible sheets. (8) The cosmetic puff according to (1), characterized in that a finger insertion portion is formed on one side of the cosmetic puff by attaching a strip-shaped band or covering sheet to the peripheral edge. (9) The cosmetic puff according to (8), characterized in that the strip-shaped band or covering sheet is attached to the peripheral edge by welding and bonding. (10) The cosmetic puff according to (1), characterized in that the flexible sheet is polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film. (11) The cosmetic puff according to (10), characterized in that the polyurethane foam, microporous polyurethane porous body, urethane synthetic leather, or urethane film is made from biomass. (12) The cosmetic puff according to (10), characterized in that the polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film uses biomass in an amount of 30% by mass or more and 60% by mass or less. (13) The cosmetic puff according to (1), characterized in that the flexible sheet and the filling are polyurethane foam. (14) The cosmetic puff according to (8), characterized in that the flexible sheet and the strip-shaped sheet or covering sheet are made of polyurethane foam. (15) The cosmetic puff according to (8), characterized in that the flexible sheet, the filling, and the strip-shaped band or covering sheet are made of polyurethane foam. (16) A cosmetic puff according to any one of (1) to (15) above, characterized in that it is for use as a facial cosmetic. (17) A cosmetic puff according to any one of (1) to (15) above, characterized in that it is for use as eye makeup. [Effects of the Invention]

[0008] According to this invention, it is possible to provide a high-performance cosmetic puff that is recyclable and has a good feel against the skin. [Brief explanation of the drawing]

[0009] [Figure 1] Figure 1(a) is a photograph showing the external appearance of a cosmetic puff according to Embodiment 1 of the present invention. Figure 1(b) is a schematic diagram showing a cross-sectional image of Figure 1(a) viewed from the front. [Figure 2] Figure 2(a) is a perspective view showing a cosmetic puff with a modified form of Figure 1(a). Figure 2(b) is a schematic diagram showing a cross-sectional image of Figure 2(a) viewed from the front. [Figure 3]It is a schematic diagram showing an image of a cross-section viewed in the front direction showing the laminated state of a plurality of materials in the manufacturing process of the cosmetic puff of FIG. 2. [Figure 4] It is a schematic diagram showing an external appearance image of a cosmetic puff according to Embodiment 2 of the present invention. [Figure 5] FIG. 5(a) is a schematic diagram showing an image of a cross-section viewed in the front direction showing the layered state of one material in the manufacturing process of the cosmetic puff according to Embodiment 2 of the present invention. FIG. 5(b) is a schematic diagram showing an image of a cross-section viewed in the front direction showing the laminated state of two materials in the manufacturing process of the cosmetic puff according to Embodiment 2 of the present invention. [Figure 6] It is a schematic diagram showing an image of a cross-section viewed in the front direction of a cosmetic puff according to Embodiment 3 of the present invention. [Figure 7] It is a schematic diagram showing an image of a cross-section of a laminate having a laminated structure of seven materials used in the manufacturing method of a cosmetic puff according to Embodiment 3 of the present invention. [Figure 8] It is a photograph of the external appearance observation of a finger puff. [Figure 9] FIG. 9(a) is a photograph of the external appearance observation of the application part tip of an eyeshadow applicator. FIG. 9(b) is a photograph of the external appearance observation of a die-cut product of the material of the application part tip. [Figure 10] FIG. 10(a) is a photograph of the external appearance observation of a cosmetic puff provided with a finger insertion part by attaching a strip belt. FIG. 10(b) is a photograph of the external appearance observation of a cosmetic puff provided with a finger insertion part by attaching a covering sheet.

Mode for Carrying Out the Invention

[0010] Next, the mode for carrying out the present invention will be described in detail with reference to the drawings. It should be understood that the present invention is not limited to the following embodiments, and design changes, improvements, etc. can be appropriately added based on the ordinary knowledge of those skilled in the art without departing from the spirit of the present invention.

[0011] <Embodiment 1> Figure 1(a) is a photograph showing the external appearance of a cosmetic puff according to Embodiment 1 of the present invention, and Figure 1(b) is a schematic diagram showing a cross-sectional image of Figure 1(a) viewed from the front.

[0012] As shown in Figures 1(a) and (b), the cosmetic puff 10 according to Embodiment 1 of the present invention consists of a central layer 1, a surface layer 2 that constitutes the cosmetic tool application surface provided on the central layer 1, and a back layer 3 provided on the opposite side of the surface layer 2 via the central layer 1. Both the surface layer 2 and the back layer 3 are made of porous flexible sheets. The central layer 1 also constitutes a flexible filler provided between the surface layer 2 and the back layer 3 (two flexible sheets).

[0013] As shown in Figures 1(a) and (b), the cosmetic puff 10 has an overall disc-like shape, with a larger width (thickness) in the center and decreasing width (narrowing) towards the outer edge. The thickness of each layer, the central layer 1, the surface layer 2, and the back layer 3, is similar. The periphery of the cosmetic puff 10 is provided with an edge portion 5, which is a joint where the surface layer 2, the central layer 1, and the back layer 3 overlap and become integrated. Furthermore, the shape of the cosmetic puff is not limited to a disc shape like the cosmetic puff 10 according to Embodiment 1 of the present invention, but may be rectangular, elliptical, or egg-shaped in plan view, and can be appropriately changed depending on the manner of use.

[0014] The vicinity of the edge portion 5 (the outermost periphery of the cosmetic puff 10) has linearly cut grooves 6, and the cross-section of the periphery has a rounded shape. As will be explained later in the method of manufacturing the cosmetic puff, during the die-cutting process, the grooves 6 are formed by linearly cutting the area where the edge portion 5 will be formed, and by applying a predetermined amount of heat to the edge portion 5, a rounded shape is formed in the cross-section of the periphery without sewing or polishing. With this configuration, the cosmetic puff 10 becomes a high-performance cosmetic puff with a good feel against the skin.

[0015] In the cosmetic puff 10, the surface layer 2 and back layer 3, which are flexible sheets, are preferably made of polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film. With this configuration, since the raw material is not rubber, no chemical modification by vulcanization is performed during the manufacturing process. Therefore, it is possible to recover and recycle the raw material. In addition, the cosmetic puff 10 can be made to be a cosmetic puff with a better feel against the skin.

[0016] The polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film constituting the flexible sheet is preferably made from biomass. With such a configuration, since the flexible sheet is made from biomass, there is an effect of reducing environmental burden, such as suppressing carbon dioxide emissions. It is preferable that the polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film constituting the flexible sheet use biomass in an amount of 30% to 60% by mass.

[0017] It is preferable that the surface layer 2 and back layer 3, which are flexible sheets, and the core layer 1, which is the filling, are all made of polyurethane foam. With this configuration, the cosmetic puff 10 can be made to be a cosmetic puff that feels better against the skin.

[0018] The cosmetic puff 10 according to Embodiment 1 provides the following effects. (1) The feel can be easily changed depending on the properties of the materials that make up the core layer (filling). (2) The amount of urethane raw material used can be reduced, resulting in cost savings. (3) When using hot melt film (described later), it acts as a barrier, preventing liquid foundation from penetrating deep into the skin. (4) It is possible to create a monomaterial by using the same material for all components. (5) The edge portion has a rounded portion near its periphery, eliminating the need for polishing during the manufacturing process of the edge portion. (6) It can be manufactured using a hot press or high-frequency welder, making it easy to manufacture. (7) By bonding only the edges, the inside can be made hollow, allowing it to be used as a various cosmetic tool by inserting fingers or tips. (8) By constructing the flexible sheet from polyurethane, a thermoplastic resin, material recycling becomes particularly feasible.

[0019] Next, a cosmetic puff according to a modified form of Embodiment 1 will be described. Figure 2(a) is a perspective view showing a cosmetic puff 11 according to a modified form of Figure 1(a). Figure 2(b) is a schematic diagram showing a cross-sectional image of Figure 2(a) viewed from the front. Figure 3 is a schematic diagram showing a cross-sectional image of Figure 2(a) viewed from the front, illustrating the layered state during the manufacturing process of the cosmetic puff 11.

[0020] As shown in Figures 2(a) and (b), the cosmetic puff 11 according to a modified form of Embodiment 1 consists of a central layer 1, a surface layer 2 that constitutes the cosmetic tool application surface provided on the central layer 1, a back layer 3 provided on the opposite side of the surface layer 2 via the central layer 1, and hot melt sheets 4 provided between the central layer 1 and the surface layer 2, and between the central layer 1 and the back layer 3, respectively. The periphery has an edge portion 5 where the surface layer 2, hot melt sheet 4, central layer 1, hot melt sheet 4, and back layer 3 overlap and are integrated. The outermost periphery of the cosmetic puff 11 has linearly cut grooves 6, and the cross-section of the periphery has a rounded shape.

[0021] As the hot melt sheet 4, hot melt films, hot melt webs, hot melt powders, etc., made of TPU (thermoplastic polyurethane), polyamide, ethylene vinyl acetate copolymer, polyolefin resin, polyester, etc., can be used. The composition and effects other than the hot melt sheet 4 are the same as those of Embodiment 1 described above. In this way, the hot melt sheet 4 is provided between the surface layer 2 and the back layer 3 (flexible sheet) and the core layer 1 (flexible filling), and the flexible sheet and the flexible filling are bonded together by the hot melt sheet 4.

[0022] Next, the manufacturing method of the cosmetic puff 11 will be described in detail. First, a hot melt sheet 4 is laminated between the surface layer 2 and the core layer 1, and between the core layer 1 and the back layer 3 to form a five-layer laminate (as shown in Figure 3). Next, the laminate is heat-pressed to produce an integrated sheet, and then the edges 5 of this integrated sheet are formed by die-cutting at a temperature of 150°C or higher using a heat press cutter or high-frequency welder at predetermined locations. This makes it possible to manufacture the cosmetic puff 11 shown in Figures 2(a) and (b). In other words, the compressed upper and lower ends of each layer of the surface layer 2, core layer 1, and back layer 3 come into contact and fuse together due to heat and pressure, creating an edge 5 with a single groove 6.

[0023] In the manufacturing method of the cosmetic puff 11, it is preferable to use a polyurethane foam (PU) for the central layer 1 with a thickness of 35 mm or less, as this is easier to use and provides a good feel and allows for easy application of cosmetics.

[0024] The surface layer 2 can be made of the material described above. A smooth, splinter-free surface for surface layer 2 is preferable for its superior decorative effect. The back layer 3 can also be made of the material described above.

[0025] To bond and integrate the five-layer structure using heat pressing, it is preferable to use a heat press machine and press at a temperature of 150°C or higher for 30 to 90 seconds.

[0026] Die-cutting is performed by pressing a five-layer integrated sheet with a die-cutting blade using a heat press or high-frequency welder to cut out the pieces. When die-cutting at temperatures above 180°C, it is preferable to set the temperature to 180-240°C for 5-30 seconds, as this easily allows for rounded edges to be obtained without sewing or polishing.

[0027] <Embodiment 2> Figure 4 is a schematic diagram showing the external appearance of a cosmetic puff 20 according to Embodiment 2 of the present invention.

[0028] The cosmetic puff 20 according to Embodiment 2 of the present invention consists of a surface layer 2 that constitutes the application surface for the cosmetic tool, and a back layer 3 provided on the opposite side of the surface layer 2 via a central layer 1. Both the surface layer 2 and the back layer 3 are formed from porous, flexible sheets. The same raw materials as in Embodiment 1 can be used for the flexible sheets of the surface layer 2 and the back layer 3.

[0029] As shown in Figure 4, the cosmetic puff 20 has an overall disc-like shape, with a larger width (thickness) in the center and becoming narrower (less wide) towards the outer edge. The thickness of each layer, the surface layer 2 and the back layer 3, is similar. The periphery of the cosmetic puff 20 is provided with an edge portion 5, which is a joint where the surface layer 2 and the back layer 3 overlap and become integrated. Furthermore, the shape of the cosmetic puff is not limited to a disc shape like the cosmetic puff 20 according to Embodiment 2 of the present invention, but may be rectangular, elliptical, or egg-shaped in plan view, and can be appropriately changed depending on the manner of use.

[0030] The outermost edge of the cosmetic puff 20 has linearly cut grooves 6, and the cross-section of the edge has a rounded shape. As will be explained later in the method of manufacturing the cosmetic puff, the grooves 6 are formed by linearly cutting the area that will form the outermost edge during the die-cutting process, and a predetermined heat is applied to the outermost edge, so that the cross-section of the edge has a rounded shape without sewing or polishing. With this configuration, the cosmetic puff 20 becomes a high-performance cosmetic puff with a good feel against the skin.

[0031] The cosmetic puff 20 has a configuration in which the central layer 1 is not provided between the surface layer 2 and the back layer 3, compared to Embodiment 1. The surface layer 2 and the back layer 3 may be a single unit, that is, composed of one flexible sheet, or they may be composed of two flexible sheets.

[0032] When the cosmetic puff 20 is made from a single flexible sheet, as shown in Figure 5(a), a die-cutting process is performed at a temperature of 150°C or higher using a hot press cutter or high-frequency welder at a predetermined location where the edge portion 5 of the single flexible sheet should be formed. This creates an edge with a single groove 6. When the cosmetic puff 20 is made from two flexible sheets, as shown in Figure 5(b), two flexible sheets are laminated to form a two-layer structure, and this laminate is heat-pressed to create an integrated sheet. Then, the edge portion 5 of this integrated sheet is formed by die-cutting using a hot press cutter or high-frequency welder at a predetermined location where the edge portion 5 should be formed. That is, the compressed upper and lower ends of each layer of the two flexible sheets come into contact and fuse together due to heat and pressure, creating an edge with a single groove 6. The heat-pressing conditions may be set in the same way as in the embodiments described above, or they may be set appropriately depending on the material and number of flexible sheets used.

[0033] <Embodiment 3> Figure 6 is a schematic diagram showing a cross-sectional image of a cosmetic puff 30 according to Embodiment 3 of the present invention, viewed from the front. As shown in Figure 6, the cosmetic puff 30 according to Embodiment 3 comprises two base material layers 31 with a film layer 33 (not shown in Figure 6) sandwiched between them, a surface film layer 32 made of TPU (thermoplastic polyurethane elastomer) on top of both base material layers 31, and a hot melt sheet 34 between both base material layers 31 and the surface film layer 32.

[0034] The two base material layers 31 are each formed as flexible sheets from polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film.

[0035] Furthermore, both the film layer 33 and the surface film layer 32 are formed from thermoplastic film. In addition, the hot melt sheet 34 can be made of hot melt film, hot melt web, hot melt powder, etc., such as TPU (thermoplastic polyurethane), polyamide, ethylene vinyl acetate copolymer, polyolefin resin, or polyester.

[0036] The cosmetic puff 30 has an overall disc shape, but maintains a consistent width (thickness) from the center to the outer edge, with the thickness decreasing only near the outer edge. The thickness of both the surface film layer 32, the hot melt sheet 34, and the base layer 31 are similar. The periphery of the cosmetic puff 30 is provided with an edge portion 35 (the outermost periphery) where the surface film layer 32, hot melt sheet 34, base layer 31, film layer 33, base layer 31, hot melt sheet 34, and surface film layer 32 overlap and are integrated. This edge portion 35 has linearly cut grooves 6, and the cross-section of the periphery has a rounded shape. Furthermore, there is a cavity 36 in the center.

[0037] Next, the method for manufacturing the cosmetic puff 30 will be described in detail. First, a laminate with a seven-layer structure is formed by laminating a first base layer 31 and a second base layer 31, each made of polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film, a film layer 33 made of thermoplastic film between them, and hot melt sheets 34, 34 between the base layer 31 and film layer 33 on both sides (as shown in Figure 7). After hot pressing the laminate to produce an integrated sheet, the edges 35 are formed only in the parts of the integrated sheet that are to be formed by hot pressing or high-frequency welding at a temperature of 150°C or higher to create the edges 35, thereby manufacturing a cosmetic puff 30 having a cavity 36.

[0038] In manufacturing the cosmetic puff 30, the aforementioned materials can be used for each layer, and the same processing conditions as those for manufacturing the cosmetic puff 11 are basically applied. In particular, as mentioned above, by sandwiching the hot melt sheet 34 and applying heat only to the edge portion, the edge portion 35 is bonded while the center portion is not bonded, making it possible to insert fingers or instruments. The thermoplastic film in the hollow portion can be removed as needed.

[0039] The cosmetic puff 30 obtained in this way can be used as a finger puff as shown in Figure 8, or as an applicator tip for an eyeshadow applicator as shown in Figure 9(a) after undergoing the die-cutting process shown in Figure 9(b).

[0040] Furthermore, since the cosmetic puff 30 has a surface film layer 32 attached to the puff (base layer 31), dirt can be removed simply by washing with water or wiping with a tissue, and the puff does not become dirty. In addition, by changing the film type and surface condition, it is possible to create different types for use with powders, liquids, creams, etc.

[0041] In the embodiments of the present invention, the cosmetic puffs 10, 11, and 30 may each have a finger-insertion portion formed on one side of the puff by attaching a strip-shaped band 21 or a covering sheet 22 to the periphery, as shown in Figure 10. Such cosmetic puffs are suitable for use as facial makeup or eye makeup. The strip-shaped band 21 or covering sheet 22 can be attached to the periphery of the cosmetic puff by welding. Specifically, an attachment point for the strip-shaped band is provided on the cosmetic puff body and the band is attached there. Alternatively, it can be fused at the same time as die-cutting using a heat press or high-frequency welder.

[0042] The strip-shaped band 21 and the covering sheet 22 can be formed from polyurethane foam, microporous polyurethane porous material, urethane synthetic leather, or urethane film. Furthermore, by forming the aforementioned flexible sheet, strip-shaped band 21, and covering sheet 22 constituting the cosmetic puff from polyurethane foam, it becomes possible to recycle the raw materials more easily and obtain a high-performance cosmetic puff with good skin feel. In addition, in cosmetic puffs made by combining multiple parts, a monomaterial cosmetic puff that can be recycled as is can be obtained. [Examples]

[0043] The following are examples to better understand the present invention and its advantages, but the present invention is not limited to these examples.

[0044] (Example 1) As a flexible sheet, a polyurethane foam sheet (TECORA 41E, apparent density 120 kg / m³) is used. 3 A 10mm thick material (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 30% plant-derived raw material ratio) was pressed and cut out using a hot press machine with a die equipped with a cutting blade. The shape of the die of the hot press machine was arbitrary, the temperature was set to 195°C, and the time was set to 30 seconds. During the die-cutting process, the edges were compressed by the heat, resulting in a cosmetic puff with rounded edges without the need for sewing or polishing.

[0045] (Example 2) As a flexible sheet, a polyurethane foam sheet (TECORA 41E, apparent density 120 kg / m³) is used. 3 Two sheets of 3mm thick material (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 30% plant-derived raw material ratio) were stacked and pressed using a hot press machine with a die equipped with a cutting blade to cut them out. The shape of the die of the hot press machine was arbitrary, the temperature was set to 195°C, and the time was 30 seconds. During the die-cutting process, heat was applied to the edges, making the edges of the two overlapping layers appear as one, resulting in a cosmetic puff with rounded edges formed without the need for sewing or polishing.

[0046] (Example 3) As a flexible sheet, a polyurethane foam sheet (TECORA 41E, apparent density 120 kg / m³) is used. 3 Two sheets of 2mm thick material (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 30% plant-derived raw material ratio) are layered together, with a polyurethane foam sheet (TECORA 45, apparent density 90kg / m²) as a filler in between. 3 A 5mm thick sheet of material (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 35% plant-derived raw material ratio) was sandwiched between layers and pressed using a hot press machine with a die equipped with a cutting blade to cut it out. The shape of the hot press machine die was arbitrary, the temperature was set to 195°C, and the time was 40 seconds. During the die-cutting process, heat was applied to the edges, making the edges of the three overlapping layers appear as one, resulting in a cosmetic puff with rounded edges formed without the need for sewing or polishing.

[0047] (Example 4) As a flexible sheet, a polyurethane foam sheet (TECORA 41E, apparent density 120 kg / m³) is used. 3 Two sheets of 2mm thick material (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 30% plant-derived raw material ratio) are layered together, with a polyurethane foam sheet (TECORA 45, apparent density 90kg / m²) as a filler in between. 3 A 5mm thick sheet (manufactured by Yukigaya Chemical Industry Co., Ltd., with a 35% plant-derived raw material ratio) is sandwiched between the flexible sheet and the filling, and a polyurethane hot melt film (MF30T-MX, 30μm thick, manufactured by Nisshinbo Textile Co., Ltd.) is sandwiched in between, creating a 5-layer structure. Next, a hot press was used to press the flexible sheet and the filling material at 150°C for 30 seconds, creating a single, integrated sheet through bonding. Next, the five-layer sheet was pressed and cut out using a hot press with a die equipped with a cutting blade. The shape of the hot press die was arbitrary, the temperature was 195°C, and the time was 40 seconds. During die-cutting, heat was applied to the edges, making the edges of the five overlapping layers appear as one, resulting in a cosmetic puff with rounded edges that could not be sewn or polished. A similar effect was obtained when die-cutting was done using a high-frequency welder instead of a hot press under the same conditions.

[0048] (Example 5) As the flexible sheet, two layers of polyurethane foam sheets (TECORA 41E, apparent density 120 kg / m 3 , thickness 2 mm, manufactured by Yukigaya Chemical Industry Co., Ltd., plant-derived raw material ratio 30%) were stacked, and a polyurethane foam sheet (TECORA 45, apparent density 90 kg / m 3 , thickness 5 mm, manufactured by Yukigaya Chemical Industry Co., Ltd., plant-derived raw material ratio 35%) was sandwiched as a filler. Further, a strip (strip sheet) with a width of 15 mm of the flexible sheet (TECORA 41E) was overlapped across the cosmetic puff and pressed with a hot press using a die with a cutting blade to cut it out. The shape of the die of the hot press was arbitrary, the temperature was 195°C, and the time was 40 seconds. When die-cutting, heat was applied to the edge portion, so that the edges of the multilayered overlapping portions appeared to be integrated, and a finger insertion strip-shaped strip-attached cosmetic puff with rounded edge ribs formed without sewing or polishing was obtained.

[0049] (Example 6) Instead of the strip sheet in Example 5, the same flexible sheet (TECORA 41E) was overlapped and molded so as to cover a part of the cosmetic puff to create a cosmetic puff with a finger insertion covering sheet.

[0050] (Example 7) Similar to Example 2, as the flexible sheet, two layers of polyurethane foam sheets (TECORA 41E, apparent density 120 kg / m 3 , thickness 3 mm, manufactured by Yukigaya Chemical Industry Co., Ltd., plant-derived raw material ratio 30%) were stacked, pressed with a hot press using a die with a cutting blade, and cut out. The shape of the die of the hot press was arbitrary, the temperature was 195°C, and the time was 30 seconds. When die-cutting, heat was applied to the edge portion, so that the edges of the two-layer overlapping portions appeared to be integrated, and rounded edge ribs were formed without sewing or polishing. In this way, a bag body with a cavity between two sheets was obtained. This was used as the application part chip of an eyeshadow applicator and adhered to a polyurethane handle shaft to make an eye makeup applicator.

[0051] The cosmetic applicators in Examples 1-7 use more than 30% plant-derived raw materials, thus reducing CO2 emissions. Furthermore, they are monomaterialized, allowing for raw material recycling. In this way, all of them are environmentally friendly. When these cosmetic tools were used to apply makeup to the face or around the eyes, they were found to be comfortable to use and to produce excellent makeup results. [Explanation of Symbols]

[0052] 1: Central layer 2: Surface layer 3: Back layer 4.34: Hot melt sheet 5,35: Edge section 6: Muscle 10, 11, 20, 30: Makeup puff 21: Band-shaped zoning 22: Covering sheet 31: Base material layer 32: Surface film layer 33: Film layer 36: Cavity

Claims

1. A cosmetic puff made of a porous, flexible sheet of polyurethane, A cosmetic puff characterized by having linear cut lines on the outermost edge, and a rounded cross-section on the edge, achieved by die-cutting using a heat press cut or high-frequency welder, resulting in a pleasant feel against the skin.

2. The cosmetic puff according to Claim 1, characterized in that the temperature at which the die-cutting process is performed is 150°C or higher.

3. The cosmetic puff according to Claim 1, characterized in that the temperature for the die-cutting process is 180°C to 240°C and the time is 5 to 30 seconds.

4. The cosmetic puff according to claim 1, characterized in that the flexible sheet is one sheet.

5. The cosmetic puff according to claim 1, characterized in that the flexible sheet comprises multiple sheets.

6. The cosmetic puff according to claim 1, characterized in that the flexible sheet consists of two sheets.

7. The cosmetic puff according to claim 5, characterized in that a flexible polyurethane filling is provided between the plurality of flexible sheets.

8. A cosmetic puff according to claim 7, characterized in that a hot-melt sheet of TPU (thermoplastic polyurethane) is provided between the flexible sheet and the flexible filling, and the flexible sheet and the flexible filling are bonded together by the hot-melt sheet.

9. The cosmetic puff according to claim 5, characterized in that a cavity is provided between the plurality of flexible sheets.

10. The cosmetic puff according to claim 1, characterized in that a finger insertion portion is formed on one side of the cosmetic puff by attaching a polyurethane strip or covering sheet to the peripheral edge.

11. The cosmetic puff according to claim 7, characterized in that a finger insertion portion is formed on one side of the cosmetic puff by attaching a polyurethane strip or covering sheet to the peripheral edge.

12. The cosmetic puff according to claim 10, characterized in that the strip-shaped band or covering sheet is attached to the peripheral edge by welding and bonding.

13. The cosmetic puff according to claim 11, characterized in that the strip-shaped band or covering sheet is attached to the peripheral edge by welding and bonding.

14. The cosmetic puff according to claim 1, characterized in that the flexible sheet is polyurethane foam, a microporous polyurethane porous body, urethane synthetic leather, or urethane film.

15. The cosmetic puff according to claim 14, characterized in that the polyurethane foam, microporous polyurethane porous body, urethane synthetic leather, or urethane film is made from biomass.

16. The cosmetic puff according to claim 14, characterized in that the polyurethane foam, microporous polyurethane porous body, urethane synthetic leather, or urethane film uses biomass in an amount of 30% by mass or more and 60% by mass or less.

17. The cosmetic puff according to claim 7, characterized in that the flexible sheet and the filling are polyurethane foam and are monomaterials that can be recycled as is.

18. The cosmetic puff according to claim 10, characterized in that the flexible sheet and the strip-shaped sheet or covering sheet are made of polyurethane foam and are monomaterials that can be recycled as is.

19. The cosmetic puff according to claim 11, characterized in that the flexible sheet, the filling, and the strip-shaped band or covering sheet are made of polyurethane foam and are monomaterial that can be recycled as is.

20. The cosmetic puff according to any one of claims 17 to 19, characterized in that the polyurethane foam is made from biomass raw materials.

21. A cosmetic puff according to any one of claims 1 to 19, characterized in that it is for use as a facial makeup product.

22. A cosmetic puff according to any one of claims 1 to 19, characterized in that it is for use as eye makeup.

23. A cosmetic puff according to claim 22, which is an egg-shaped cosmetic puff that is the applicator tip of an eyeshadow applicator.

Images