Nail sticker set

Abstract

To suppress that a decorative effect generated by a decorative layer depends on a material, a characteristic or the like of a UV-curing layer.SOLUTION: A nail seal set comprises a substantially-rectangular base sheet, and a plurality of nail seals which are arranged on the base sheet while being aligned along a prescribed direction. A rectangular frame is formed at the base sheet at one side in a prescribed direction with respect to the plurality of nail seals. Each of the nail seals comprises an adhesion layer, a UV-curing layer and a decorative layer. The decorative layer adheres to a nail. The UV-curing layer is located above the adhesion layer, brought into a soft semi-solid state before UV irradiation, and cured by the UV irradiation. The decorative layer is located above the UV-curing layer, and has at least either of a color and a pattern. That is, the decorative layer constituting a decoration of the nail is located above the UV-curing layer.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The technology disclosed in this specification relates to a nail seal set. [Background technology]

[0002] Nail seals known as gel nail stickers have been known in the field of nail art for some time (see Patent Document 1). These nail seals have a lower interfacing portion and an upper interfacing portion. The lower interfacing portion is made of a soft material with a color or pattern and is attached directly to the nail. The upper interfacing portion is located on top of the lower interfacing portion and is a transparent coating layer that provides gloss. Before being attached to the nail, the upper interfacing portion is in a soft, semi-solid state so that it can conform to the curved surface of the nail. After being attached to the nail, when irradiated with ultraviolet light, it maintains its shape and hardens into a solid state. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2017 / 26790 Summary of the Invention [Problem to be solved by the invention]

[0004] In the conventional nail stickers described above, the upper end interleaving portion, which hardens when exposed to ultraviolet light, covers the upper part of the lower end interleaving portion, which has the color or pattern that constitutes the nail decoration. Therefore, there is room for improvement, for example, because the decorative effect of the color or pattern may depend on the material or characteristics of the upper end interleaving portion.

[0005] This specification discloses a technique that can solve at least part of the above-mentioned problems. [Means for solving the problem]

[0006] The technology disclosed in this specification can be realized in the following forms.

[0007] The nail sticker set disclosed herein includes a substantially rectangular base sheet and a plurality of nail stickers arranged on the base sheet in a predetermined direction. A rectangular frame is formed on the base sheet on one side of the plurality of nail stickers in the predetermined direction. Each nail sticker includes an adhesive layer attached to the nail, an ultraviolet-curable layer, and a decorative layer. The ultraviolet-curable layer is located on top of the adhesive layer, is soft and semi-solid before UV irradiation, and hardens when UV is irradiated. The decorative layer is located on top of the ultraviolet-curable layer and has at least one of a color and a pattern. In this nail sticker set, the decorative layer that constitutes the nail decoration is located on top of the ultraviolet-curable layer. Therefore, compared to conventional nail stickers, the decorative effect of the decorative layer is less dependent on the material and characteristics of the ultraviolet-curable layer.

[0008] The technology disclosed in this specification can be realized in various forms, for example, nail seals, methods for manufacturing nail seals, methods for using nail seals, etc. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a top view showing a nail seal set 1 according to an embodiment of the present invention; [Figure 2] FIG. 2 is an explanatory diagram showing a cross-sectional configuration of the nail seal 100 taken along the line II-II in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] A. Implementation: A-1. Nail Sticker 100 composition: 1 is a top view showing a nail seal set 1 according to this embodiment. This product is a nail seal (also called a nail sticker) that is attached to the top of a fingernail. A view of the back side is omitted because it has no pattern or has a pattern similar to that of the front side.

[0011] As shown in Figure 1, the nail sticker set 1 includes a rectangular base sheet 200 and a plurality of nail stickers 100 arranged on one surface of the base sheet 200. The base sheet 200 is, for example, a sheet made of a light-transmitting resin. The back surface of each nail sticker 100 is protected by the base sheet 200.

[0012] The nail stickers 100 are generally rectangular and extend in one direction, with four rounded corners. A plurality of nail stickers 100 are arranged on the surface of the base sheet 200 in a predetermined direction (the longitudinal direction of the base sheet 200 in FIG. 1, hereinafter referred to as the "sticker arrangement direction"). All of the nail stickers 100 have approximately the same length L (e.g., 20 mm or more and 24 mm or less) in the longitudinal direction. Furthermore, the widths W of the nail stickers 100 in the short direction (sticker arrangement direction) are different from one another. In FIG. 1, the width W gradually increases from the nail sticker 100 located at one end of the sticker arrangement direction to the nail sticker 100 located at the other end.

[0013] Fig. 2 is an explanatory diagram showing a cross-sectional configuration of the nail seal 100 at the position II-II in Fig. 1. As shown in Fig. 2, the nail seal 100 includes an adhesive layer 110, an ultraviolet curing layer 120, a decorative layer 130, and a coating layer 140.

[0014] The adhesive layer 110 is removably attached to the surface of the base sheet 200. The adhesive layer 110 is a layer that maintains its softness and adhesiveness both before and after irradiation with ultraviolet light. The adhesive layer 110 is preferably made of a medical adhesive such as an acrylic adhesive, a rubber adhesive (such as an adhesive containing natural rubber or synthetic rubber as its main component), or a silicone adhesive. The adhesive layer 110 may contain at least one of a softener, a resin, and a filler in addition to the adhesive. The adhesive layer 110 does not have any color or pattern that constitutes a decoration visible from the outside of the nail sticker 100, and is, for example, a layer of the color (transparent, etc.) of the material of the adhesive layer 110.

[0015] The UV-curable layer 120 is located on top of the adhesive layer 110, and is a layer that is in a soft semi-solid state (e.g., gel-like) before UV irradiation and hardens when UV is irradiated. Specifically, the UV-curable layer 120 is disposed so as to adhere closely to the surface of the adhesive layer 110. The UV-curable layer 120 contains a UV-curable raw material (which may contain, for example, a urethane acrylate oligomer or a polyester oligomer). The UV-curable raw material is, for example, a substance that maintains a soft semi-solid state before UV irradiation, but receives energy from an external substance and hardens into a solid polymeric substance through a photopolymerization reaction when UV is irradiated.

[0016] In this embodiment, when the ultraviolet cured layer 120 is irradiated with ultraviolet rays, it becomes harder than before the ultraviolet irradiation, but is not in a completely solid state, but rather becomes a soft, non-solid state (semi-gel-like). Such an ultraviolet cured layer 120 can be produced by adjusting the content (e.g., 50 wt% or less) of the ultraviolet cured material in the ultraviolet cured layer 120 before ultraviolet irradiation. The ultraviolet cured layer 120 may also contain at least one of a thermally dried material, a photoinitiator (which may include, for example, trimethylbenzoylphosphine oxide), and an additive.

[0017] The decorative layer 130 is located on top of the ultraviolet-cured layer 120 and has at least one of a color (pigment) and a pattern (including a design) that constitutes a decoration visible from outside the nail sticker 100. FIG. 1 illustrates a nail sticker 100 with a gradation decoration. The decorative layer 130 maintains its softness before and after irradiation with ultraviolet light. In this embodiment, the decorative layer 130 is a printed layer in which at least one of a color and a pattern is printed (transferred) onto the surface of the ultraviolet-cured layer 120. The decorative layer 130 can be formed, for example, by printing (transferring) a color, a pattern, etc. onto the surface of the semi-solid ultraviolet-cured layer 120 using various transfer methods such as inkjet printing or screen printing.

[0018] The coating layer 140 is positioned on top of the decorative layer 130. The coating layer 140 is soft and semi-solid before UV irradiation, hardens when irradiated with UV, and is optically transparent (e.g., transparent). The coating layer 140 contains a UV-curable raw material. However, the content (wt%) of the UV-curable raw material in the coating layer 140 is preferably lower than the content (wt%) of the UV-curable raw material in the UV-curable layer 120. The coating layer 140 may be glossy. Furthermore, the thickness D4 of the coating layer 140 (the thickness in the stacking direction of the nail sticker 100; the same applies hereinafter) is thinner than the thickness D2 of the UV-curable layer 120. The coating layer 140 preferably contains an adhesive, which improves the bonding between the decorative layer 130 and the coating layer 140. The coating layer 140 may be formed on top of the decorative layer 130 before shipping, or may be formed after shipping by a user spraying a gel or spray containing the UV-curable raw material onto the top of the decorative layer 130.

[0019] The thickness D1 of the adhesive layer 110 is thicker than the thickness D2 of the UV-cured layer 120 after curing. The cushioning properties of the adhesive layer 110 are higher than the cushioning properties of the UV-cured layer 120 after curing. The thickness D3 of the decorative layer 130 is thinner than the UV-cured layer 120 and is preferably thinner than the coating layer 140. The thickness of the adhesive layer 110 is preferably 50 μm or more and 100 μm or less. The thickness of the UV-cured layer 120 is preferably 30 μm or more and 60 μm or less. The thickness of the decorative layer 130 is preferably 4 μm or more and 60 μm or less. The thickness of the coating layer 140 is preferably 15 μm or more and 30 μm or less.

[0020] A-2. Advantages of this embodiment: An example of how to use the nail sticker set 1 according to this embodiment is as follows: Peel the desired nail sticker 100 from the base sheet 200, and attach the back surface (adhesive layer 110) of the nail sticker 100 to the surface of the nail (which may be an artificial nail). At this time, the UV-curable layer 120 and the coating layer 140 are both in a soft, semi-solid state, so the nail sticker 100 as a whole is flexible. Therefore, the nail sticker 100 can be deformed to a shape corresponding to the curved surface of the nail and adhered to the surface of the nail. After that, when the nail sticker 100 is irradiated with UV light for a certain period of time, the UV-curable layer 120 and the coating layer 140 are hardened. As a result, the nail sticker 100 is attached to the surface of the nail while maintaining its shape corresponding to the surface of the nail.

[0021] In this embodiment, the decorative layer 130 that constitutes the nail decoration is located on top of the ultraviolet cured layer 120 (see FIG. 2). Therefore, compared to conventional nail stickers, the decorative effect of the decorative layer 130 can be made less dependent on the material and characteristics of the ultraviolet cured layer 120. In other words, since the color and pattern of the decorative layer 130 are located closer to the surface of the nail sticker 100, the color and the like of the decorative layer 130 appear more clearly on the surface of the nail sticker 100.

[0022] In this embodiment, the adhesive layer 110 is thicker in the stacking direction of the nail sticker 100 than the cured UV-cured layer 120 and has high cushioning properties. Therefore, the cushioning properties of the adhesive layer 110 can reduce the burden on the nail caused by, for example, the curing of the UV-cured layer 120. For example, it can absorb the impact from the nail sticker 100 to the nail due to external force. Furthermore, when peeling the nail sticker 100 from the nail, the cushioning properties of the adhesive layer 110 can prevent stress caused by deformation of the nail sticker 100 from being transmitted to the nail. In this way, the nail sticker 100 of this embodiment can be attached to and detached from the nail while preventing damage to the nail.

[0023] In this embodiment, the decorative layer 130 is a printed layer in which at least one of a color and a pattern is printed on the surface of the ultraviolet cured layer 120. Therefore, the bonding strength between the decorative layer 130 and the ultraviolet cured layer 120 can be improved without providing a separate adhesive layer.

[0024] In this embodiment, the decorative layer 130 is sandwiched and held between the coating layer 140 and the ultraviolet-cured layer 120. Therefore, the shapeability of the nail sticker 100 as a whole can be improved compared to, for example, a configuration without a coating layer. Furthermore, since the coating layer 140 is thinner than the ultraviolet-cured layer 120, the decorative effect of the decorative layer 130 can be made less dependent on the material and characteristics of the coating layer 140 compared to, for example, a configuration in which the coating layer 140 has the same thickness as the ultraviolet-cured layer 120. In short, according to this embodiment, by dividing the layer that is cured by ultraviolet light into two layers (the ultraviolet-cured layer 120 and the coating layer 140) that sandwich the decorative layer 130 from above and below, the shapeability (strength) of the nail sticker 100 as a whole can be ensured while suppressing the influence of the decorative layer 130 on the decorative effect.

[0025] As shown in FIG. 1, the decorative layer 130 of the nail sticker 100 has a gradation in which the color density gradually decreases from one longitudinal end of the nail sticker 100 to the other. That is, the pattern on one end of the nail sticker 100 (the upper side of FIG. 1 , a dark gradation color) is different from the pattern on the other end (the lower side of FIG. 1 , e.g., a light gradation color). Therefore, the nail sticker 100 can be selectively used by using the pattern on one end or the pattern on the other end. In the method using the pattern on the one end, one end of the nail sticker 100 is attached to the nail so that it matches the base of the nail, and the other end is cut off. This allows for the creation of a nail with a gradation color that becomes lighter from the base to the tip. In the method using the pattern on the other end, the other end of the nail sticker 100 is attached to the nail so that it matches the base of the nail, and the one end is cut off. This allows for the creation of a nail with a gradation color that becomes darker from the base to the tip. In other words, one nail sticker 100 can be used to enjoy two different designs.

[0026] B. Variations: The technology disclosed in this specification is not limited to the above-described embodiments, and can be modified into various forms without departing from the spirit thereof, for example, the following modifications are also possible.

[0027] The configurations of the nail sticker set 1 and the nail stickers 100 in the above embodiment are merely examples and can be modified in various ways. For example, a release paper may be attached to the back surface (adhesive layer 110) of each nail sticker 100 instead of the base sheet 200. Also, a protective sheet may be attached to the surface (e.g., coating layer 140) of the nail sticker 100.

[0028] 1 illustrates a nail sticker 100 having a decorative layer 130 with a gradation pattern, but the present invention is not limited to this, and the color and pattern (including the pattern) of the decorative layer 130 may include, for example, a pattern other than a gradation, or letters, figures, symbols, etc. The decorative layer 130 is not limited to a printed layer, and may be, for example, a sheet-like member.

[0029] The materials forming each layer of the nail sticker 100 of the above embodiment are merely examples, and each member may be formed of other materials. For example, the adhesive layer 110 and the ultraviolet curing layer 120 may contain a colored (e.g., chromatic) pigment as long as they do not constitute decoration of the nail sticker 100. Furthermore, the materials forming the ultraviolet curing layer 120 and the coating layer 140 are not limited to materials that harden into a non-solid state after ultraviolet irradiation, and may also be materials that harden into a solid state.

[0030] The manufacturing method of the nail seal 100 in the above embodiment is merely an example and can be modified in various ways. [Explanation of symbols]

[0031] 1: Nail seal set 100: Nail seal 110: Adhesive layer 120: UV curable layer 130: Decorative layer 140: Coating layer 200: Base sheet

Claims

[Claim 1] A substantially rectangular base sheet; A plurality of gel nail stickers are arranged on the base sheet along the longitudinal direction of the base sheet, The base sheet has a rectangular frame formed on one side in the longitudinal direction of the plurality of gel nail stickers, Each gel nail seal is a nail seal set having an adhesive layer to be attached to the nail, an ultraviolet curing layer located on top of the adhesive layer, which is in a soft semi-solid state before being irradiated with ultraviolet light and hardens when irradiated with ultraviolet light, and a decorative layer located on top of the ultraviolet curing layer and which has at least one of a color and a pattern.

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