Artificial nail

Abstract

An artificial nail is disclosed. According to the present invention, the artificial nail comprises: a nail body; and a shape deformation layer provided at a lower portion of the nail body, wherein in a case where the nail body is pressed and attached to a fingernail or a toenail, a lower surface of the shape deformation layer is deformed into a shape corresponding to the shape of an upper surface of the fingernail or the toenail and an upper surface thereof is deformed into a shape corresponding to the shape of a lower surface of the nail body, so that the shape deformation layer fills a gap between the lower surface of the nail body and the upper surface of the fingernail or the toenail.

Description

artificial nails

[0001] The present invention relates to artificial nails, and more particularly, to artificial nails with improved wearability, adhesiveness, and nail retention.

[0002] Users attach artificial nails with various colors and designs to their fingernails and toenails to improve the length or shape of their fingernails and toenails.

[0003] Artificial nails have the advantage of being more aesthetically pleasing than natural fingernails and toenails and can be shaped to extend from fingernails and other objects.

[0004] However, since artificial nails have low flexibility, when attached to nails with various shapes, such as nails with various widths and lengths, nails with various curvatures and textures, and nails with various grooves and deformations, there is a problem in that it is difficult to naturally deform them to accommodate the various shapes of nails, and thus the wearing comfort is reduced.

[0005] In addition, since artificial nails are restored after being attached to fingernails, etc., severe tightening occurs due to restoration, and gaps or bubbles are created between the fingernails and artificial nails due to restoration, which causes hair to get caught between the fingernails and artificial nails, and contaminants to seep in, which reduces adhesiveness and nail retention.

[0006] [Prior Art Literature]

[0007] [Patent Document]

[0008] Republic of Korea Patent No. 10-1226696

[0009] Therefore, the technical problem to be solved by the present invention is to provide an artificial nail that has improved wearing comfort regardless of the various shapes of nails, etc., and also has improved adhesiveness and nail retention rate.

[0010] According to one aspect of the present invention, an artificial nail may be provided, including a four-piece body; and a shape-deforming layer provided on a lower portion of the four-piece body, wherein when the four-piece body is pressed and attached to a fingernail or toenail, a lower surface thereof is deformed into a shape corresponding to the upper surface shape of the fingernail or toenail, and an upper surface thereof is deformed into a shape corresponding to the lower surface shape of the four-piece body, thereby filling a gap between the lower surface of the four-piece body and the upper surface of the fingernail or toenail.

[0011] The thickness of the central portion of the shape deformation layer may be 0.05 to 5.0 mm, the thickness of the shape deformation layer may become thinner from the central portion to the edge, the ratio of the length of the shape deformation layer to the length of the four-body may be 0.1 to 0.95, and the ratio of the width of the shape deformation layer to the width of the four-body may be 0.1 to 0.95.

[0012] The above shape deformation layer is 0.01 to 10 kgf / cm 2 It can have a Young's modulus.

[0013] The above shape-deforming layer can be hardened after being laminated on the upper surface of a fingernail or toenail.

[0014] The shape-deforming layer may further include a first adhesive layer that is provided on the lower portion of the shape-deforming layer and adheres to the upper surface of the fingernail or toenail, is arranged to surround the lower portion of the shape-deforming layer, and controls the deformation direction of the shape-deforming layer when the nail body is pressed and the shape-deforming layer is deformed.

[0015] The thickness of the first adhesive layer may be 0.05 to 1.5 mm, the ratio of the length of the first adhesive layer to the length of the four-body may be 0.1 to 1, and the ratio of the width of the first adhesive layer to the width of the four-body may be 0.1 to 1.

[0016] The first adhesive layer may include a plurality of first full-color lines cut through the first adhesive layer from the outside to the inside.

[0017] The first adhesive layer may include at least one first opening provided along the edge.

[0018] The first adhesive layer may include a plurality of first perforations spaced apart from each other in the longitudinal and width directions of the four-body body.

[0019] The first adhesive layer may include a plurality of first slots arranged to be spaced apart from each other in the direction from one end of the nail body corresponding to the cuticle layer of the fingernail or toenail to the other end of the nail body corresponding to the free edge of the fingernail or toenail.

[0020] The shape deformation layer may further include a first deformation limiting layer that is provided on the lower part of the shape deformation layer and adhered to the upper surface of the fingernail or toenail, and has a border attached to the lower surface of the nail body along the border of the shape deformation layer and arranged to surround the shape deformation layer, and supports the shape deformation layer while limiting the deformation direction of the shape deformation layer.

[0021] The thickness of the first strain-limiting layer may be 0.005 to 1.5 mm, the ratio of the length of the first strain-limiting layer to the length of the four-body may be 0.1 to 1, and the ratio of the width of the first strain-limiting layer to the width of the four-body may be 0.1 to 1.

[0022] The above first strain limiting layer is 0.03 to 60 kgf / cm 2 It can have a Young's modulus.

[0023] The above first strain-limiting layer can be hardened after being laminated on the upper surface of the fingernail or toenail.

[0024] The first strain-limiting layer may include a plurality of second full-color lines cut through the first strain-limiting layer from the outside to the inside.

[0025] The first deformation limiting layer may include at least one second opening provided along the edge.

[0026] The above second opening may be formed so that the inlet-side cross-sectional area is larger than the outlet-side cross-sectional area.

[0027] The first deformation limiting layer may include a plurality of second perforations spaced apart from each other in the longitudinal and width directions of the four-body body.

[0028] The cross-sectional areas of the plurality of second perforations may be the same or different from each other.

[0029] The first deformation limiting layer may include a plurality of second slots arranged to be spaced apart from each other in the direction from one end of the nail body corresponding to the cuticle layer of the fingernail or toenail to the other end of the nail body corresponding to the free edge of the fingernail or toenail.

[0030] A second deformation limiting layer provided on the lower part of the shape deformation layer, having a border attached to the lower surface of the nail body along the border of the shape deformation layer and arranged to surround the shape deformation layer, supporting the shape deformation layer and limiting a deformation direction of the shape deformation layer; and a second adhesive layer provided on the lower part of the second deformation limiting layer and adhered to the upper surface of a fingernail or toenail, arranged to surround the lower part of the second deformation limiting layer, and controlling a deformation direction of the shape deformation layer when the nail body is pressed and the shape deformation layer is deformed may be further included.

[0031] The thickness of the second strain-limiting layer is 0.005 to 1.5 mm, the ratio of the length of the second strain-limiting layer to the length of the four-piece body is 0.1 to 1, the ratio of the width of the second strain-limiting layer to the width of the four-piece body is 0.1 to 1, the thickness of the second adhesive layer is 0.5 to 1.5 mm, the ratio of the length of the second adhesive layer to the length of the four-piece body is 0.1 to 1, and the ratio of the width of the second adhesive layer to the width of the four-piece body may be 0.1 to 1.

[0032] The second strain-limiting layer may include a plurality of third full-color lines cut through the second strain-limiting layer from the outside to the inside.

[0033] The second adhesive layer may include a plurality of fourth full-color lines cut through the second adhesive layer from the outside to the inside.

[0034] Embodiments of the present invention provide a shape-deforming layer on the lower surface of a nail body, so that the shape-deforming layer can fill the gap between the lower surface of the nail body and the upper surface of a fingernail or toenail, and can be deformed to correspond to various shapes of the nail or toenail, thereby improving the wearing comfort regardless of various shapes of the nail or toenail, and also improving adhesiveness and nail retention rate.

[0035] In addition, in embodiments of the present invention, the shape-deforming layer is deformed to fit the shape of the lower surface of the nail and the upper surface of the nail, etc., so that the tightening phenomenon due to the restoration of the nail can be prevented, the close contact and adhesiveness of the nail to the nail, etc. can be improved, and the generation of gaps or bubbles between the nail and the nail can be suppressed, thereby preventing hair from getting caught and contaminants from seeping in.

[0036] Figure 1 is a perspective view of an artificial nail according to a first embodiment of the present invention.

[0037] Figure 2 is an exploded perspective view of an artificial nail according to the first embodiment of the present invention.

[0038] Figure 3 is a cross-sectional view taken along line AA of Figure 1.

[0039] Figure 4 is a BB cross-sectional view of Figure 1.

[0040] Figure 5 is a back view of an artificial nail according to the first embodiment of the present invention.

[0041] FIG. 6 is an example of a first adhesive layer having a first opening, a first perforation, and a first slot formed according to a first embodiment of the present invention.

[0042] Fig. 7 is an example of a first adhesive layer having a first full color line formed thereon according to the first embodiment of the present invention.

[0043] Figures 8 and 9 are diagrams showing the state of use of artificial nails according to the first embodiment of the present invention.

[0044] Figure 10 is a diagram showing the state of use of an artificial nail having a first full color line according to the first embodiment of the present invention.

[0045] Fig. 11 is a perspective view of an artificial nail according to a second embodiment of the present invention.

[0046] Figure 12 is an exploded perspective view of an artificial nail according to a second embodiment of the present invention.

[0047] Fig. 13 is a CC cross-sectional view of Fig. 11.

[0048] Fig. 14 is a DD cross-sectional view of Fig. 11.

[0049] Fig. 15 is a back view of an artificial nail according to a second embodiment of the present invention.

[0050] FIG. 16 is an example of a first deformation limiting layer having a second opening, a second perforation, and a second slot formed therein according to a second embodiment of the present invention.

[0051] Fig. 17 is an example of a first deformation limiting layer in which a second full-color line is formed according to a second embodiment of the present invention.

[0052] Figures 18 and 19 are diagrams showing the state of use of artificial nails according to the second embodiment of the present invention.

[0053] Fig. 20 is a cross-sectional view taken along the EE line of Fig. 19, showing the state of use of an artificial nail having a first deformation limiting layer in which a second opening is formed.

[0054] Figure 21 is a diagram showing the state of use of an artificial nail equipped with a second full-color line according to a second embodiment of the present invention.

[0055] Fig. 22 is a perspective view of an artificial nail according to a third embodiment of the present invention.

[0056] Figure 23 is an exploded perspective view of an artificial nail according to a third embodiment of the present invention.

[0057] Fig. 24 is a FF cross-sectional view of Fig. 22.

[0058] Fig. 25 is a GG cross-sectional view of Fig. 22.

[0059] Fig. 26 is a back view of an artificial nail according to a third embodiment of the present invention.

[0060] Figures 27 and 28 are diagrams showing the state of use of artificial nails according to the third embodiment of the present invention.

[0061] Figure 29 is a diagram showing the state of use of an artificial nail having a third full color line and a fourth full color line according to a third embodiment of the present invention.

[0062] In order to fully understand the present invention, its operational advantages, and the objects achieved by the practice of the present invention, reference should be made to the accompanying drawings illustrating preferred embodiments of the present invention and the contents described in the accompanying drawings.

[0063] Hereinafter, the present invention will be described in detail by describing preferred embodiments thereof with reference to the attached drawings. The same reference numerals in each drawing represent the same components.

[0064]

[0065] Hereinafter, an artificial nail according to the first embodiment of the present invention will be described.

[0066] FIG. 1 is a perspective view of an artificial nail according to a first embodiment of the present invention, FIG. 2 is an exploded perspective view of an artificial nail according to a first embodiment of the present invention, FIG. 3 is a cross-sectional view taken along line AA of FIG. 1, FIG. 4 is a cross-sectional view taken along line BB of FIG. 1, FIG. 5 is a rear view of an artificial nail according to a first embodiment of the present invention, FIG. 6 is an example of a first adhesive layer having a first opening, a first perforation, and a first slot formed according to a first embodiment of the present invention, and FIG. 7 is an example of a first adhesive layer having a first full color line formed according to a first embodiment of the present invention.

[0067] Referring to FIGS. 1 to 7, an artificial nail (100) according to a first embodiment of the present invention includes a four-body body (110), a shape-deforming layer (120) provided on the lower portion of the four-body body (110), and a first adhesive layer (130) provided on the lower portion of the shape-deforming layer (120).

[0068] The four-piece body (110) according to the present embodiment is attached to an object such as a fingernail or toenail on its lower surface. In addition, since the object such as a fingernail or toenail to which the four-piece body (110) is attached has a three-dimensional curved surface, the four-piece body (110) has a three-dimensional curved shape corresponding to the shape of the object such as a fingernail.

[0069] In this embodiment, the four-piece body (110) may be formed of one or a combination of two of polymethyl methacrylate (PMMA) and acrylonitrile-styrene-butadiene copolymer (ABS), but the scope of the present invention is not limited thereto and may be formed of various materials such as transparent and opaque. In addition, when a shape-deforming layer (120) to be described later is provided on the lower surface of the four-piece body (110), the four-piece body (110) can be manufactured to be very hard, that is, to have high hardness, and the shape of the four-piece body (110) can be maintained as is even after attaching the four-piece body (110) to a fingernail or the like.

[0070] The four-body body (110) is formed into a three-dimensional curved shape corresponding to the shape of an object such as a fingernail, and the radius of curvature in the longitudinal direction of the four-body body (110) can be formed to be larger than the radius of curvature in the width direction.

[0071] And although not shown, a design layer (not shown) providing various colors or patterns may be provided on the upper part of the four-body body (110), and a coating layer (not shown) may be provided on the upper part of the design layer to protect the surface of the design layer and increase the glossiness to improve the appearance of the design layer.

[0072] The shape-deforming layer (120) according to the present embodiment is deformed when the four-piece body (110) is pressed and attached to a fingernail or the like, and the shape is deformed to fit the shape of the upper surface of the fingernail or toenail and the lower surface of the four-piece body (110).

[0073] When the four-piece body (110) is laminated and pressed onto a fingernail or the like, the shape-deforming layer (120) is also pressed together, and at this time, the shape-deforming layer (120) can have a shape corresponding to the upper surface of the fingernail or the like and the lower surface of the four-piece body (110). Specifically, when the four-piece body (110) is pressurized and attached to the fingernail or the like, the shape-deforming layer (120) is also pressed together, so that the upper surface of the shape-deforming layer (120) is deformed into a shape corresponding to the shape of the lower surface of the four-piece body (110), and the lower surface of the shape-deforming layer (120) can be deformed into a shape corresponding to the shape of the upper surface of the fingernail or the like. The shape-deforming layer (120) can have fluidity and flexibility so as to be deformable corresponding to the shape of the lower surface of the four-piece body (110) and the shape of the upper surface of the fingernail or the like.

[0074] A user's fingernails, etc., may have various shapes. For example, the widthwise curve (C-Curve) and lengthwise curve (T-Curve) of a user's fingernails may vary from person to person, the curves and grains formed on the upper surface of the fingernails may vary, and the grooves and deformations formed on the upper surface of the fingernails may vary.

[0075] Conventional artificial nails cannot be naturally deformed to correspond to various shapes of the user's fingernails, etc., so when attaching the artificial nail to the upper surface of the fingernail, etc., the gap between the artificial nail and the upper surface of the fingernail, etc., which has a widthwise curve (C-Curve) and a lengthwise curve (T-Curve), cannot be filled, so there is a problem that the artificial nail is lifted from the upper surface of the fingernail, etc., and a gap or micro-sized bubble is formed between the artificial nail and the upper surface of the fingernail, etc., and this reduces the user's wearing comfort and reduces the adhesiveness and nail retention rate.

[0076] In contrast, since the shape deformation layer (120) according to the present embodiment can be deformed to correspond to various shapes of a fingernail, etc., the shape deformation layer (120) can fill the gap between the lower surface of the nail body (110) and the upper surface of the nail, etc., thereby preventing the nail body (110) from being lifted off the upper surface of the nail, etc. In addition, when the shape deformation layer (120) is deformed to fill the gap between the lower surface of the nail body (110) and the upper surface of the nail, etc., the formation of a gap or micro-sized bubble between the lower surface of the nail body (110) and the upper surface of the nail, etc. can be prevented. In addition, when the shape deformation layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and a predetermined pressure or more is applied to the shape deformation layer (120), the shape deformation layer (120) moves or flows between the four-piece body (110) and the first adhesive layer (130), thereby filling the gap between the widthwise side end of the four-piece body (110) and the widthwise side end of the nail, etc., thereby preventing hair from getting caught and foreign substances from entering the side end of the four-piece body (110) (see FIG. 9(a)). In addition, when the shape deformation layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of a fingernail, etc., the adhesion of the four-piece body (110) to the fingernail, etc. is improved, a tightening phenomenon due to restoration of the four-piece body (110) can be prevented, and the formation of a gap or micro-sized bubble between the lower surface of the four-piece body (110) and the upper surface of a fingernail, etc. can be suppressed, thereby preventing hair from getting caught and contaminants from seeping in.

[0077] In addition, since conventional artificial nails cannot be naturally deformed to correspond to various shapes of the user's fingernails, etc., when attaching artificial nails to the upper surface of the fingernails, etc., there was a problem in that the curves, grooves, and deformations formed on the upper surface of the fingernails, etc. could not be filled, and thus a gap or micro-sized bubble was formed between the artificial nail and the upper surface of the fingernails, etc., and this caused a problem in that the adhesive force and nail retention rate were reduced.

[0078] In contrast, since the shape deformation layer (120) according to the present embodiment can be deformed to correspond to various shapes of fingernails, etc., the shape deformation layer (120) is deformed to correspond to the shape of the curves and grains, grooves and deformations, etc. formed on the upper surface of the fingernails, etc., and fills the curves and resulting grooves and deformations, etc. formed on the upper surface of the fingernails, etc., so that the shape deformation layer (120) can adhere closely to the upper surface of the fingernails, etc., thereby improving the adhesive strength and nail retention rate, and can prevent the formation of voids or microscopic bubbles between the shape deformation layer (120) and the upper surface of the fingernails, etc. (see FIG. 9(a)).

[0079] In addition, conventionally, when artificial nails are attached to the upper surface of a fingernail, glue nails or adhesives are used, and when artificial nails are attached to the upper surface of a fingernail, glue nails or adhesives are used, the degree of adhesion of the artificial nails to the upper surface of the fingernail, etc., is low, causing discomfort due to severe tightening and shrinkage following restoration of the artificial nails, and during the restoration process of the artificial nails, gaps and microbubbles are formed between the artificial nails and the upper surface of the fingernail, etc., causing hair to get caught, etc., reducing the adhesive strength, and when separating the artificial nails from the upper surface of the fingernail, etc., the glue nails or adhesives must be dissolved with acetone, which has the problem of being harmful to the human body.

[0080] In contrast, the artificial nail (100) according to the present embodiment is composed of a shape-deforming layer (120) and a first adhesive layer (130) provided on the lower portion of the shape-deforming layer (120), and does not use a glue nail or adhesive as in the prior art, and when the shape-deforming layer (120) is deformed to fill the gap between the lower surface of the nail body (110) and the upper surface of the nail, etc., the adhesiveness of the nail body (110) to the upper surface of the nail, etc. is increased, thereby resolving the discomfort caused by the tightening and shrinkage due to the restoration of the nail body (110), and suppressing the formation of gaps and microbubbles between the lower surface of the nail body (110) and the upper surface of the nail, etc. due to the restoration, thereby preventing hair from getting caught, etc., and improving the adhesive strength. In the case where the nail body (110) is to be separated from the upper surface of the nail, etc., since a glue nail or adhesive as in the prior art is not used, it may not cause harm to the human body.

[0081] The shape deformation layer (120) may be formed by applying it to the four-body body (110) by any one of dispensing, 3D printing, and double injection; however, the scope of the present invention is not limited thereto and may be formed in various ways. In addition, the shape deformation layer (120) may have a single-layer structure or a multi-layer structure.

[0082] And when the four-body (110) is attached to a fingernail or the like by applying pressure, the shape deformation layer (120) is easily deformed by 0.01 to 10 kgf / cm. 2 It can have a Young's modulus of 0.05 to 5 kgf / cm, preferably 0.05 to 5 kgf / cm 2 can have a modulus of elasticity.

[0083] Meanwhile, the shape-deforming layer (120) may be composed of a thermosetting resin, a photocurable resin, and a heat-drying resin that contain at least one of a thermosetting component, a photocurable component, and a heat-drying component. In addition, the shape-deforming layer (120) may be laminated on a nail or the like in a semi-cured state and deformed, and then further heat-cured, photocured, or heat-dried.

[0084] In this embodiment, thermal curing means thermal curing in the conventional sense triggered by thermal crosslinking by heat treatment, thermal drying means solidification caused by drying of a solvent included in a polymer or a mixture thereof, and photocuring means solidification by UV.

[0085] The shape-deforming layer (120) can be manufactured from a composition including nitrocellulose resin, polyurethane resin, cellulose acetate butyrate resin, UV-curable monomer, heat-curable silicone, and urethane resin.

[0086] The shape-deforming layer (120) may include at least one of a thermosetting component, a photocurable component, and a heat-drying component.

[0087] The thermosetting component is a polyester polyol, a polyester polyol, an acrylic resin in the form of a polyol, a polycarbonate polyol, a polycaprolactone polyol, a polypropylene, a polytetramethylene glycol polyol, or a prepolyol synthesized using the aforementioned polyols, and is cured using an isocyanate (NCO) curing agent.

[0088] In addition, to implement low modulus, acrylates containing methyl groups such as 2-HEMA (2-Hydroxyethyl methacrylate), IBOMA (Isobornyl methacrylate), and 2-HPMA (2-Hydroxypropyl Methacrylate), as well as general monofunctional monomers and UV-curable oligomers with two or more functional groups can be used as plasticizers.

[0089] Photocurable components include monomers with a Tg (glass transition temperature) of -50 degrees (℃) or lower, such as EHA (2-ethylhexyl acrylate), BMA (n-butyl methacrylate), BA (Butyl acrylate), EOEOEA (2-(2-ethoxyethoxy)ethyl acrylate), and IDA (Isodecyl Acrylate). Non-reactive resins can be used to create low modulus. Resins used to create low modulus are characterized by lack of UV reactivity, and resins that are in a liquid or solid state at room temperature can be added.

[0090] Heat-drying components are resins dissolved in a solvent, in a solid or liquid state at room temperature, and are used by dissolving the resin in a solvent. This includes resins with a glass transition temperature (Tg) of -5 degrees (℃) or lower at room temperature, and urethane gels in the form of urethane foam. Conventional polyacrylic resins, polyacrylic polyols, urethane resins that have undergone a urethane reaction, and polyols used in thermosetting resins can be used as is.

[0091] In addition, in cases where the glass transition temperature (Tg) is high, acrylates containing methyl groups such as 2-HEMA (2-Hydroxyethyl methacrylate), IBOMA (Isobornyl methacrylate), and 2-HPMA (2-Hydroxypropyl Methacrylate), as well as general monofunctional monomers, monomers with two or more functional groups, and UV-curable oligomers with one or more functional groups can be used as plasticizers to implement low modulus.

[0092] After preparing a composition including at least one of the thermosetting component, the photocurable component, and the heat-drying component as described above, the shape-deforming layer (120) can be easily prepared by applying the composition to the four-body body (110). And as described above, the shape-deforming layer (120) has a density of 0.01 to 10 gf / cm 2 It can have a Young's modulus of 0.05 to 5 kgf / cm, preferably 0.05 to 5 kgf / cm 2 It can have a modulus of elasticity. And the user can apply pressure to the four-body (110) with a fingernail or the like to deform the shape-deforming layer (120), and then harden the shape-deforming layer (120) into a hard state.

[0093] The first adhesive layer (130) according to the present embodiment is provided on the lower portion of the shape-deforming layer (120) and adheres to the upper surface of a fingernail or the like. In addition, the first adhesive layer (130) is arranged to surround the lower portion of the shape-deforming layer (120).

[0094] When the first adhesive layer (130) is provided under the shape deformation layer (120), a gap space (C) can be formed between the shape deformation layer (120) and the first adhesive layer (130) (see FIGS. 3 and 4), and when the shape deformation layer (120) is deformed by pressure applied by the four-body body (110), the gap space (C) can be filled with the shape deformation layer (120) (see FIG. 9).

[0095] In addition, the first adhesive layer (130) can control the deformation or movement direction of the shape deformation layer (120) when the four-piece body (110) is pressurized and the shape deformation layer (120) is deformed. Depending on the degree of deformation of the shape deformation layer (120), the shape deformation layer (120) can move or flow outside the first adhesive layer (130). For example, when the degree of deformation of the shape deformation layer (120) is large, that is, when the shape deformation layer (120) receives a large pressure in a specific direction and the amount of movement or flow in the specific direction is large, the adhesive region between the upper surface of the edge of the first adhesive layer (130) and the lower surface of the four-piece body (110) is released from adhesion due to the pressure resulting from the deformation or movement of the shape deformation layer (120), and thus the shape deformation layer (120) can move or flow between the first adhesive layer (130) and the four-piece body (110) (see FIG. 9(a)).

[0096] Meanwhile, if the shape deformation layer (120) has strong adhesive force, the first adhesive layer (130) may be omitted, but it is preferable to use the first adhesive layer (130) to increase adhesive force on fingernails, etc. In addition, if the shape deformation layer (120) is hardened and the shape deformation layer (120) itself is slightly contracted or deformed, the first adhesive layer (130) can serve as a buffer for the contraction or deformation of the shape deformation layer (120).

[0097] The first adhesive layer (130) may be formed of one or a blend of PSA (Pressure Sensitive Adhesive), a vinyl monomer-based polymerized adhesive, a rubber-based adhesive, a polyurethane-based two-component adhesive, etc.

[0098] Meanwhile, referring to FIG. 9(a), when the upper surface of the four-piece body (110) is pressed, the shape-deforming layer (120) having fluidity and flexibility is compressed and spread over the entire area of ​​the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and is deformed to fit the shape of the lower surface of the four-piece body (110) and the upper surface of the nail, etc., to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., or the shape-deforming layer (120) is deformed and moves or flows between the four-piece body (110) and the first adhesive layer (130) to fill the gap between the width-direction side end of the four-piece body (110) and the width-direction side end of the nail, etc. In this way, since the movement or flow of the shape-deforming layer (120) varies depending on the curved shape of the upper surface of the nail, etc., the size of the nail, etc., the pressure applied, etc., it is necessary to control this. This is because, if the shape deformation layer (120) moves or flows in an undesirable direction or the amount of movement or flow is too large, the wearing comfort may be reduced and hair may become caught, and also, the nail retention rate, which is maintained by the nail body (110) attached to the upper surface of the nail, etc., may be reduced.

[0099] Accordingly, in the present embodiment, in order to control the deformation direction of the shape deformation layer (120), the first adhesive layer (130) may include at least one first opening (132) provided along the edge. The first opening (132) may control the horizontal deformation of the shape deformation layer (120) corresponding to the longitudinal and / or widthwise deformation of the four-body body (110). Although at least one first opening (132) formed in the first adhesive layer (130) to be open in the direction of the free edge of a nail or the like is illustrated in FIGS. 6(a) to 6(c), the present invention is not limited thereto, and the first opening (132) may be formed to be open in at least one direction among the cuticle layer, the free edge, and the side of the nail or the like.

[0100] The first opening (132) controls the deformation of the shape deformation layer (120) in the longitudinal and / or transverse directions of the four-piece body (110), that is, controls the movement or flow of the shape deformation layer (120) in the longitudinal and / or transverse directions of the four-piece body (110). That is, when the first opening (132) is formed in the first adhesive layer (130), and the shape deformation layer (120) is deformed under pressure, the movement or flow amount of the shape deformation layer (120) increases in the direction of the first opening (132).

[0101] In addition, in order to improve the close fit and wearability of the nail body (110) and the nail retention rate and to prevent hair from getting caught in the nail body (110), the number, size, shape, inlet side (E) cross-sectional area, outlet side (O) cross-sectional area, etc. of the first openings (132) can be varied so that the movement or flow of the shape-deforming layer (120) can be controlled according to the shape of the upper surface of the nail, etc., the size of the nail, etc. Referring to Fig. 6(a), one first opening (132) is provided in the first adhesive layer (130), and referring to Fig. 6(b), two first openings (132) are provided in the first adhesive layer (130), and referring to Fig. 6(c), three first openings (132) are provided in the first adhesive layer (130). In addition, the first opening (132) may be formed so that the inlet-side (E) cross-sectional area is larger than the outlet-side (O) cross-sectional area along the movement or flow direction of the shape-deforming layer (120). This is because when the shape-deforming layer (120) moves or flows at a high speed through the first opening (132), bubbles may be generated in the first adhesive layer (130) or the wearing comfort of the four-body (110) may be reduced, so that the resistance is increased so that the shape-deforming layer (120) slowly moves or flows through the first opening (132). Thus, the inlet-side (E) cross-sectional area of ​​the first opening (132) may be formed larger than the outlet-side (O) cross-sectional area.

[0102] In addition, in order to control the deformation direction of the shape deformation layer (120) in the present embodiment, referring to FIG. 6(d) and FIG. 6(e), the first adhesive layer (130) may include a plurality of first perforations (134) spaced apart from each other in the length direction and width direction of the four-body body (110). The plurality of first perforations (134) may control the deformation of the shape deformation layer (120) in the height direction.

[0103] The first perforation (134) can be formed in various shapes such as circular or polygonal. And the cross-sectional areas of the plurality of first perforations (134) can be the same or different from each other. When the shape deformation layer (120) is deformed under pressure, the shape deformation layer (120) can move or flow to the lower side of the first adhesive layer (130) through the first perforation (134). In addition, the plurality of first perforations (134) described above can be formed as a single first perforation (134) having a relatively large size (see FIG. 6(f)).

[0104] In addition, in order to control the deformation direction of the shape deformation layer (120) in the present embodiment, referring to FIGS. 6(g) to 6(i), the first adhesive layer (130) may include a plurality of first slots (135) that are arranged to be spaced apart from each other in the direction from one end of the four-piece body (110) corresponding to the cuticle layer of the fingernail or toenail to the other end of the four-piece body (110) corresponding to the free edge of the fingernail or toenail. The plurality of first slots (135) may control the deformation of the shape deformation layer (120) in the height direction.

[0105] The plurality of first slots (135) may be formed in various shapes, such as ovals and polygons, of the four-piece body (110). In addition, the plurality of first slots (135) may be formed such that their cross-sectional areas decrease from one end of the four-piece body (110) to the other end. When the shape-deforming layer (120) is subjected to pressure deformation, the shape-deforming layer (120) may move or flow downward through the first slots (135) of the first adhesive layer (130).

[0106] In addition, in the present embodiment, in order to prevent the first adhesive layer (130) from forming wrinkles or the like when the first adhesive layer (130) is adhered to a fingernail or the like, referring to FIG. 7, the first adhesive layer (130) may include a plurality of first full-color lines (131). When the four-piece body (110) is adhered to a fingernail or the like, wrinkles or the like may form in the first adhesive layer (130) due to the curvature of the four-piece body (110), so the wrinkles may be prevented by adjusting the length, shape, spacing, etc. of the plurality of first full-color lines (131) formed in the first adhesive layer (130). In addition, like the first opening (132), the first perforation (134), and the first slot (135) described above, the first full-color line (131) may control the deformation direction of the shape-deforming layer (120).

[0107] The first full color line (131) is formed by cutting the first adhesive layer (130) from the outside to the inside. One end of the first full color line (131) cuts the outside of the first adhesive layer (130), and the other end of the first full color line (131) cuts the first adhesive layer (130) from the outside to the inside of the first adhesive layer (130) to a predetermined length.

[0108] For example, the other end of the first full-color line (131) arranged in the longitudinal direction of the first adhesive layer (130) can cut the first adhesive layer (130) from the outer side to the inner side by at least 5% of the length of the first adhesive layer (130), and the other end of the first full-color line (131) arranged in the width direction of the first adhesive layer (130) can cut the first adhesive layer (130) from the outer side to the inner side in the width direction of the first adhesive layer (130) by at least 5% of the width of the first adhesive layer (130).

[0109] The first full color line (131) may be a straight full color line cut from the first adhesive layer (130) (see FIG. 7(a)), a straight full color line cut from the first adhesive layer (130) but having a predetermined width (see FIG. 7(b)), a V-shaped notched full color line cut from the first adhesive layer (130) in a V shape (see FIG. 7(c)), a U-shaped notched full color line cut from the first adhesive layer (130) in a U shape (see FIG. 7(d)), and a full color line mixed with a straight line and a notched shape (see FIG. 7(e)), but is not limited thereto and various forms of full color lines may be used.

[0110] In addition, when the nail plate (110) is pressed against the upper surface of the nail, etc., the shape deformation layer (120) is deformed by pressure, and some of the shape deformation layer (120) flows into the first full color line (131) formed in the first adhesive layer (130) to fill the first full color line (131). When the shape deformation layer (120) is deformed to fill the first full color line (131), the user cannot visually identify the first full color line (131), so that the aesthetic defect caused by forming the first full color line (131) in the first adhesive layer (130) can be resolved and the aesthetic feel can be improved (see FIG. 10). In addition, since the shape deformation layer (120) flows into the first full color line (131), the first full color line (131) can control the deformation direction of the shape deformation layer (120).

[0111] In addition, when the nail body (110) is pressurized and attached to the upper surface of the nail, etc., the shape-deforming layer (120) and the first adhesive layer (130) are deformed together. In addition, the lower surface of the first adhesive layer (130) that comes into contact with the nail, etc. is deformed into a shape corresponding to the shape of the upper surface of the nail, etc., and adheres to the nail, etc. In other words, the first adhesive layer (130) can have fluidity and flexibility that can be deformed into a shape corresponding to the shape of the curves, grooves, deformations, etc. formed on the upper surface of the nail, etc. (see FIG. 9(a)). Therefore, since the contact area between the lower surface of the first adhesive layer (130) and the upper surface of the nail, etc. increases, the adhesive force of the nail body (110) to the nail, etc. can be improved.

[0112] Meanwhile, although not shown, the artificial nail (100) according to the present invention may further include a protective film (not shown) provided on the lower surface of the first adhesive layer (130) to protect the first adhesive layer (130). The protective film protects the first adhesive layer (130) until the first adhesive layer (130) is adhered to a nail or the like.

[0113] The protective film has a release property and can be peeled off from the first adhesive layer (130).

[0114] The protective film may be manufactured by surface coating a film or sheet made of one selected from among paper, polyvinyl chloride (PVC), polyethylene (PE), polyurethane (PU), polypropylene (PP), polyethylene terephthalate (PET), polyolefin elastomer (POE), ethylene-vinyl acetate copolymer (EVA), and acrylic resins, or a polymer thereof, with silicone, fluorine, etc.

[0115] Meanwhile, in the case where the shape deformation layer (120) and the first adhesive layer (130) are sequentially provided on the lower part of the four-piece body (110), the minimum size, maximum size, and thickness of the shape deformation layer (120) and the first adhesive layer (130) provided on the lower part of the four-piece body (110) can be limited to solve problems such as inconvenience in attaching the four-piece body (110) to a fingernail, etc., hair getting caught, and contamination by foreign substances.

[0116] Referring to Fig. 4, the central thickness (T1) of the shape deformation layer (120) may be 0.05 to 5.0 mm, and preferably 0.1 to 2.0 mm. In addition, the thickness of the shape deformation layer (120) may be formed to become thinner from the center to the edge.

[0117] If the central thickness (T1) of the shape deformation layer (120) exceeds 5.0 mm, hair entanglement may increase and the wearing comfort may deteriorate, and if the central thickness (T1) of the shape deformation layer (120) is less than 0.05 mm, the desired fit and adhesiveness cannot be obtained.

[0118] The minimum and maximum sizes of the shape deformation layer (120) can be expressed as a ratio of the length and width of the shape deformation layer (120) to the length and width of the four-body body (110).

[0119] Referring to FIG. 5, the ratio of the length (L2) of the shape deformation layer (120) to the length (L1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.9. In addition, the ratio of the width (W2) of the shape deformation layer (120) to the width (W1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.9.

[0120] That is, in the present embodiment, the minimum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 10% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 95% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 95% of the width (W1) of the four-piece body (110).

[0121] Referring to Fig. 4, the thickness (T2) of the first adhesive layer (130) may be 0.05 to 1.5 mm. Meanwhile, the thickness (T2) of the first adhesive layer (130) may be uniformly formed over the entire area or may vary within a range of 0.05 to 1.5 mm.

[0122] And, since the first adhesive layer (130) is arranged to surround the lower part of the shape-deforming layer (120), the size of the first adhesive layer (130) is formed to be larger than the size of the shape-deforming layer (120).

[0123] The minimum and maximum sizes of the first adhesive layer (130) can be expressed as a ratio of the length and width of the first adhesive layer (130) to the length and width of the four-body body (110).

[0124] Referring to FIG. 5, the ratio of the length (L3) of the first adhesive layer (130) to the length (L1) of the four-body body (110) may be 0.1 to 1, and the ratio of the width (W3) of the first adhesive layer (130) to the width (W1) of the four-body body (110) may be 0.1 to 1.

[0125] That is, in the present embodiment, the minimum size of the first adhesive layer (130) corresponds to the case where the length (L3) of the first adhesive layer (130) is 10% of the length (L1) of the four-piece body (110) and the width (W3) of the first adhesive layer (130) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the first adhesive layer (130) corresponds to the case where the length (L3) of the first adhesive layer (130) is 100% of the length (L1) of the four-piece body (110) and the width (W3) of the first adhesive layer (130) is 100% of the width (W1) of the four-piece body (110).

[0126] As described above, by adjusting the minimum and maximum sizes and thicknesses of the shape-deforming layer (120) and the first adhesive layer (130), inconvenience, hair getting caught, contamination by foreign substances, etc. can be prevented when pressurizing and attaching the nail body (110) to a fingernail, etc. In this case, as described above, the first adhesive layer (130) is arranged to surround the lower part of the shape-deforming layer (120), so the size of the first adhesive layer (130) is formed to be larger than the size of the shape-deforming layer (120).

[0127]

[0128] The operation of attaching an artificial nail (100) according to the first embodiment of the present invention configured as described above to a fingernail or the like is described as follows.

[0129] FIG. 8 and FIG. 9 are diagrams showing the state of use of an artificial nail according to the first embodiment of the present invention, and FIG. 10 is a diagram showing the state of use of an artificial nail having a first full color line according to the first embodiment of the present invention.

[0130] Referring to Fig. 8, first, the protective film is peeled off from the first adhesive layer (130). When the protective film is peeled off, the first adhesive layer (130) is exposed. Then, the first adhesive layer (130) is pressed against the upper surface of a nail or the like, and the four-piece body (110) is pressed to attach the four-piece body (110) to the nail or the like.

[0131] Referring to FIG. 9, when the upper surface of the four-piece body (110) is pressed, the shape-deforming layer (120) having fluidity and flexibility is compressed and spreads over the entire area of ​​the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and is deformed to fit the shape of the lower surface of the four-piece body (110) and the upper surface of the nail, etc., thereby filling the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., so that the four-piece body (110) does not rise from the upper surface of the nail, etc., thereby improving the wearing comfort and fit. At this time, depending on the degree to which the shape deformation layer (120) is pressurized, the shape deformation layer (120) moves or flows between the four-piece body (110) and the first adhesive layer (130), thereby filling the gap between the longitudinal and / or transverse end of the four-piece body (110) and the longitudinal and / or transverse end of a fingernail, etc., thereby preventing hair from getting caught and foreign substances from entering the side end of the four-piece body (110) (see FIG. 9(a)).

[0132] Meanwhile, when a first opening (132), a first perforation (134), or a first slot (135) is formed in the first adhesive layer (130) and the shape-deforming layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., the shape-deforming layer (120) moves or flows in the horizontal direction and the height direction of the four-piece body (110) through the first opening (132), the first perforation (134), or the first slot (135) formed in the first adhesive layer (130), and the amount of movement or flow of the shape-deforming layer (120) can be controlled through the first opening (132), the first perforation (134), or the first slot (135) of the first adhesive layer (130), thereby controlling the deformation direction of the shape-deforming layer (120).

[0133] In addition, when the first full color line (131) is formed on the first adhesive layer (130) and the shape-deforming layer (120) is deformed to fill the gap between the lower surface of the nail body (110) and the upper surface of the nail, etc., when the first adhesive layer (130) is adhered to the nail, etc., a straight full color line (see FIG. 10(a)) in which the first adhesive layer (130) is cut, a straight full color line (see FIG. 10(b)) in which the first adhesive layer (130) is cut but has a predetermined width, a V-shaped notched full color line (see FIG. 10(c)) in which the first adhesive layer (130) is cut in a V shape, a U-shaped notched full color line (see FIG. 10(d)) in which the first adhesive layer (130) is cut in a U shape, and a full color line mixed with a straight line and a notched shape (see FIG. 10(e)) etc. The full color line (131) can prevent wrinkles, etc. from occurring in the first adhesive layer (130).

[0134] And when the shape deformation layer (120) is deformed under pressure, a part of the shape deformation layer (120) flows into the first full color line (131) formed in the first adhesive layer (130), so that the deformation direction of the shape deformation layer (120) can be controlled. When the shape deformation layer (120) is deformed to fill the first full color line (131), the user cannot visually identify the first full color line (131), so that the aesthetic defect caused by forming the first full color line (131) in the first adhesive layer (130) can be resolved and the aesthetic feel can be improved.

[0135] And, while the first adhesive layer (130) is adhered to the upper surface of the nail, etc., and the shape-deforming layer (120) is deformed, the nail body (110) is maintained in a state of being attached to the upper surface of the nail, etc. And, while the first adhesive layer (130) is adhered to the nail, etc., and the shape-deforming layer (120) is deformed, the shape-deforming layer (120) is hardened.

[0136] As described above, the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc. is filled by the shape-deforming layer (120), so that the user's wearing comfort, the close contact and adhesiveness of the four-piece body (110) to the nail, etc., and the nail retention rate of the four-piece body (110) to the nail, etc. can be improved.

[0137]

[0138] Hereinafter, an artificial nail according to a second embodiment of the present invention will be described.

[0139] FIG. 11 is a perspective view of an artificial nail according to a second embodiment of the present invention, FIG. 12 is an exploded perspective view of an artificial nail according to a second embodiment of the present invention, FIG. 13 is a cross-sectional view taken along line CC of FIG. 11, FIG. 14 is a cross-sectional view taken along line DD of FIG. 11, FIG. 15 is a rear view of an artificial nail according to a second embodiment of the present invention, FIG. 16 is an example of a first deformation limiting layer having a second opening, a second perforation, and a second slot formed according to a second embodiment of the present invention, and FIG. 17 is an example of a first deformation limiting layer having a second full color line formed according to a second embodiment of the present invention.

[0140] Referring to FIGS. 11 to 17, an artificial nail (100) according to a second embodiment of the present invention includes a four-piece body (110), a shape-deforming layer (120) provided on a lower portion of the four-piece body (110), and a first deformation-limiting layer (140) provided on a lower portion of the shape-deforming layer (120). In addition, the artificial nail (100) according to the second embodiment of the present invention may further include a protective film (not shown) provided on a lower portion of the first deformation-limiting layer (140).

[0141] The four-body (110), shape-deforming layer (120), and protective film according to the second embodiment of the present invention are identical to the four-body (110), shape-deforming layer (120), and protective film according to the first embodiment of the present invention, so a detailed description thereof will be omitted and the differences will be described below.

[0142] The first deformation limiting layer (140) according to the present embodiment can support the shape deformation layer (120) and at the same time limit the deformation direction of the shape deformation layer (120). That is, the first deformation limiting layer (140) can limit at least one of the horizontal deformation and the height deformation of the shape deformation layer (120).

[0143] The first deformation limiting layer (140) is provided on the lower side of the shape deformation layer (120) and adhered to the upper surface of the fingernail or toenail. In addition, the first deformation limiting layer (140) is arranged so that its edge is attached to the lower surface of the nail plate (110) along the edge of the shape deformation layer (120) and surrounds the shape deformation layer (120).

[0144] The first deformation limiting layer (140) has adhesiveness and can be adhered to a fingernail, etc., and in this case, a separate adhesive layer can be omitted. When the first deformation limiting layer (140) is provided under the shape deformation layer (120), a gap space (C) can be formed between the shape deformation layer (120) and the first deformation limiting layer (130) (see FIGS. 13 and 14), and when the shape deformation layer (120) is deformed by pressure applied by the nail body (110), the gap space (C) can be filled with the shape deformation layer (120) (see FIG. 19).

[0145] In cases where the first strain-limiting layer (140) has adhesiveness, a protective film may be provided on the lower surface of the strain-limiting layer (140) to protect the strain-limiting layer (140). The protective film protects the strain-limiting layer (140) until the strain-limiting layer (140) is adhered to a fingernail or the like.

[0146] The first deformation limiting layer (140) may be formed by applying it to the four-body body (110) and the shape deformation layer (120) by any one of dispensing, 3D printing, double injection, and laminating methods; however, the scope of the present invention is not limited thereto and may be formed in various ways. In addition, the first deformation limiting layer (140) may have a single-layer structure or a multi-layer structure.

[0147] The first strain limiting layer (140) is 0.03 to 60 kgf / cm 2 The Young's modulus of the first strain-limiting layer (140) may be the same as or greater than the Young's modulus of the shape-deforming layer (120). That is, the hardness of the first strain-limiting layer (140) may be the same as or greater than the hardness of the shape-deforming layer (120). However, even when the shape of the shape-deforming layer (120) is deformed, it is preferable that the hardness of the first strain-limiting layer (140) be greater than the hardness of the shape-deforming layer (120) so that the first strain-limiting layer (140) can limit the deformation of the shape-deforming layer (120).

[0148] In addition, the first deformation limiting layer (140) may be composed of a thermosetting resin, a photocurable resin, and a heat-drying resin that contain at least one of a thermosetting component, a photocurable component, and a heat-drying component. In addition, the first deformation limiting layer (140) may be laminated on a nail or the like in a semi-cured state and then further heat-cured, photocured, or heat-dried.

[0149] In this embodiment, thermal curing means thermal curing in the conventional sense triggered by thermal crosslinking by heat treatment, thermal drying means solidification caused by drying of a solvent included in a polymer or a mixture thereof, and photocuring means solidification by UV.

[0150] The first deformation limiting layer (140) can be manufactured from a composition including a nitrocellulose resin, a polyurethane resin, a cellulose acetate butyrate resin, a UV-curable monomer, a UV-curable oligomer, a heat-curable silicone, and a urethane resin.

[0151] The first deformation limiting layer (140) may include at least one of a thermosetting component, a photocurable component, and a heat-drying component.

[0152] The thermosetting component is polyester polyol, polyester polyol, acrylic resin in polyol form, polycarbonate polyol, polycaprolactone polyol, polypropylene, polytetramethylene glycol polyol, or a propolyol synthesized using the aforementioned polyols, and is cured using an isocyanate (NCO) curing agent.

[0153] Photocurable components include monomers with a Tg (glass transition temperature) of -50 degrees (℃) or lower, such as EHA (2-ethylhexyl acrylate), BMA (n-butyl methacrylate), BA (Butyl acrylate), EOEOEA (2-(2-ethoxyethoxy)ethyl acrylate), and IDA (Isodecyl Acrylate). Non-reactive resins can be used to create low modulus. Resins used to create low modulus are characterized by lack of UV reactivity, and resins that are in a liquid or solid state at room temperature can be added.

[0154] Heat-drying components are resins dissolved in a solvent, in a solid or liquid state at room temperature, and are used by dissolving the resin in a solvent. This includes resins with a glass transition temperature (Tg) of -5 degrees (℃) or lower at room temperature, and urethane gels in the form of urethane foam. Conventional polyacrylic resins, polyacrylic polyols, urethane resins that have undergone a urethane reaction, and polyols used in thermosetting resins can be used as is.

[0155] As described above, after preparing a composition including at least one of a thermosetting component, a photocurable component, and a heat-drying component, the composition is applied to the four-body body (110) and the shape-deforming layer (120), thereby easily providing the first strain-limiting layer (140). As described above, the first strain-limiting layer (140) has a strain resistance of 0.03 to 60 kgf / cm. 2 It can have a Young's modulus. And the user can apply pressure to the four-body (110) with a fingernail or the like to deform the shape-deforming layer (120), and then harden the shape-deforming layer (120) and the first deformation-limiting layer (140) into a hard state.

[0156] And, when the upper surface of the four-piece body (110) is pressed, the shape-deforming layer (120) having fluidity and flexibility is compressed and spread over the entire area of ​​the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and is deformed to fit the shape of the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and fills the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., the movement or flow of the shape-deforming layer (120) varies depending on the shape of the upper surface of the nail, etc. and the size of the nail, etc., so it is necessary to limit this. This is because, when the shape-deforming layer (120) moves or flows in an undesired direction, or the amount of movement or flow is too large, the wearing comfort may be reduced, a hair-catching phenomenon may occur, and also, the nail retention rate in which the four-piece body (110) is attached to and maintained on the upper surface of the nail, etc. may be reduced.

[0157] Accordingly, the first deformation limiting layer (140) according to the present embodiment is arranged so that its edge is attached to the lower surface of the four-piece body (110) along the edge of the shape deformation layer (120) and surrounds the shape deformation layer (120), thereby limiting deformation of the shape deformation layer (120). Here, the edge of the first deformation limiting layer (140) attached to the lower surface of the four-piece body (110) is fixed to the lower surface of the four-piece body (110), so that even when the pressure applied to the four-piece body (110) is considerably large when attaching the four-piece body (110) to the upper surface of a fingernail or the like, the shape deformation layer (120) can be prevented from moving or leaking beyond the edge of the first deformation limiting layer (140) attached to the lower surface of the four-piece body (110).

[0158] Accordingly, since the first deformation limiting layer (140) is arranged to surround the shape deformation layer (120), the horizontal and height direction deformation of the shape deformation layer (120) is limited to the inside of the first deformation limiting layer (140). Here, the horizontal direction deformation of the shape deformation layer (120) means that the shape deformation layer (120) is deformed in the length direction and width direction of the four-piece body (110) due to the pressure applied to the four-piece body (110).

[0159] Meanwhile, even when the deformation of the shape deformation layer (120) is limited by the first deformation restriction layer (140), it is necessary to allow movement or flow of the shape deformation layer (120) in a specific direction.

[0160] Accordingly, in the present embodiment, when the shape deformation layer (120) is deformed, the first deformation limitation layer (140) may include at least one second opening (142) provided along the edge so that the shape deformation layer (120) can move horizontally beyond the first deformation limitation layer (140).

[0161] The second opening (142) allows the shape deformation layer (120) to move horizontally beyond the first deformation limitation layer (140). In FIGS. 16(a) to 16(c), at least one second opening (142) formed in the first deformation limitation layer (140) to be open in the direction of the free edge of a nail or the like is illustrated, but this is not limited thereto, and the second opening (142) may be formed to be open in at least one direction among the cuticle layer, the free edge, and the side of the nail or the like.

[0162] The second opening (142) enables the shape deformation layer (120) to move or flow in the longitudinal direction and / or the width direction of the four-body body (110) beyond the first deformation limitation layer (140). That is, when the second opening (142) is formed in the first deformation limitation layer (140), and the shape deformation layer (120) is subjected to pressure deformation, the shape deformation layer (120) can move or flow through the second opening (142).

[0163] In addition, in order to improve the close fit and wearability of the nail body (110) and the nail retention rate and to prevent hair from getting caught in the nail body (110), the number, size, shape, inlet-side (E) cross-sectional area, and outlet-side (O) cross-sectional area of ​​the second openings (142) can be varied depending on the shape of the upper surface of the nail, the size of the nail, etc., so that the shape-deforming layer (120) can move or flow through the second openings (142). Referring to Fig. 16(a), one second opening (142) is provided in the first deformation-limiting layer (140), and referring to Fig. 16(b), two second openings (142) are provided in the first deformation-limiting layer (140), and referring to Fig. 16(c), three second openings (142) are provided in the first deformation-limiting layer (140). In addition, the second opening (142) may be formed so that the inlet-side (E) cross-sectional area is larger than the outlet-side (O) cross-sectional area along the movement or flow direction of the shape deformation layer (120). This is because when the shape deformation layer (120) moves or flows at a high speed through the second opening (142), bubbles may be generated in the first deformation restriction layer (140) or the fit of the four-body body (110) may be reduced, so that the resistance is increased so that the shape deformation layer (120) moves or flows slowly through the second opening (142). Therefore, the inlet-side (E) cross-sectional area of ​​the second opening (142) may be formed larger than the outlet-side (O) cross-sectional area.

[0164] In addition, in order to allow a specific direction of deformation or movement of the shape deformation layer (120), in the present embodiment, referring to FIG. 16(d) and FIG. 16(e), the first deformation limiting layer (140) may include a plurality of second perforations (144) spaced apart from each other in the longitudinal and width directions of the four-body body (110). The plurality of second perforations (144) enable the shape deformation layer (120) to move in the height direction beyond the first deformation limiting layer (140).

[0165] The second perforations (144) can be formed in various shapes such as circular or polygonal. In addition, the cross-sectional areas of the plurality of second perforations (144) can be the same or different from each other. When the shape deformation layer (120) is deformed under pressure, the shape deformation layer (120) can move or flow downwards of the first deformation restriction layer (140) through the second perforations (144). In addition, the plurality of second perforations (144) described above can be formed as a single second perforation (144) having a relatively large size (see FIG. 16(f)).

[0166] In addition, in order to allow a specific direction deformation of the shape deformation layer (120) in the present embodiment, referring to FIGS. 16(g) to 16(i), the first deformation limiting layer (140) may include a plurality of second slots (145) that are arranged to be spaced apart from each other in the direction from one end of the four-piece body (110) corresponding to the cuticle layer of the fingernail or toenail to the other end of the four-piece body (110) corresponding to the free edge of the fingernail or toenail. The plurality of second slots (145) enable the shape deformation layer (120) to move in the height direction beyond the first deformation limiting layer (140).

[0167] The plurality of second slots (145) can be formed in various shapes, such as ovals and polygons, of the four-piece body (110). In addition, the plurality of second slots (145) can be formed so that the cross-sectional area decreases from one end of the four-piece body (110) to the other end. When the shape-deforming layer (120) is subjected to pressure deformation, the shape-deforming layer (120) can move or flow downward through the second slots (145) of the first deformation-limiting layer (140).

[0168] In addition, in the present embodiment, in order to prevent wrinkles, etc. from occurring in the deformation limiting layer (140) when the first deformation limiting layer (140) is adhered to a fingernail or the like, referring to FIG. 17, the first deformation limiting layer (140) may further include a plurality of second full-color lines (141). When the four-piece body (110) is adhered to a fingernail or the like, wrinkles, etc. may occur in the first deformation limiting layer (140) due to the curvature of the four-piece body (110), so wrinkles can be prevented by adjusting the length, shape, spacing, etc. of the plurality of second full-color lines (141) formed in the first deformation limiting layer (140).

[0169] The second full-color line (141) is formed by cutting the first strain-limiting layer (140) from the outside to the inside so as to penetrate the first strain-limiting layer (140). One end of the second full-color line (141) cuts the outside of the first strain-limiting layer (140), and the other end of the second full-color line (141) cuts the first strain-limiting layer (140) from the outside to the inside of the first strain-limiting layer (140) to a predetermined length.

[0170] For example, the other end of the second full-color line (141) arranged in the longitudinal direction of the first strain-limiting layer (140) can cut the first strain-limiting layer (140) from the outer side to the inner side by at least 5% of the length of the first strain-limiting layer (140), and the other end of the second full-color line (141) arranged in the width direction of the first strain-limiting layer (140) can cut the first strain-limiting layer (140) from the outer side to the inner side in the width direction of the first strain-limiting layer (140) by at least 5% of the width of the first strain-limiting layer (140).

[0171] The second full-color line (141) may be a straight full-color line cut through the first strain-limiting layer (140) (see FIG. 17(a)), a straight full-color line cut through the first strain-limiting layer (140) but having a predetermined width (see FIG. 17(b)), a V-shaped notched full-color line cut through the first strain-limiting layer (140) in a V shape (see FIG. 17(c)), a U-shaped notched full-color line cut through the first strain-limiting layer (140) in a U shape (see FIG. 17(d)), and a full-color line mixed with a straight and notched shape (see FIG. 17(e)), but is not limited thereto and various forms of full-color lines may be used.

[0172] In addition, when the nail plate (110) is pressed against the upper surface of the nail, the shape deformation layer (120) is deformed under pressure, and a part of the shape deformation layer (120) flows into the second full color line (141) formed in the first deformation limiting layer (140) to fill the second full color line (141). When the shape deformation layer (120) is deformed to fill the second full color line (141), the user cannot visually identify the second full color line (141), so that the aesthetic defect caused by forming the second full color line (141) in the first deformation limiting layer (140) can be resolved and the aesthetic feel can be improved (see FIG. 21). In addition, since the shape deformation layer (120) flows into the second full color line (141), the second full color line (141) can allow the shape deformation layer (120) to be deformed or moved beyond the first deformation limiting layer (140).

[0173] In addition, when the nail body (110) is pressurized and attached to the upper surface of the nail, etc., the shape deformation layer (120) and the first deformation limiting layer (140) can be deformed together. In addition, the lower surface of the first deformation limiting layer (140) that comes into contact with the nail, etc. is deformed into a shape corresponding to the shape of the upper surface of the nail, etc., and is in close contact with the nail, etc. In other words, the first deformation limiting layer (140) can have fluidity and flexibility that can be deformed into a shape corresponding to the shape of the curves, grooves, deformations, etc. formed on the upper surface of the nail, etc. (see FIG. 19(a)). Therefore, since the contact area between the lower surface of the first deformation limiting layer (140) and the upper surface of the nail, etc. increases, the adhesive force of the nail body (110) to the nail, etc. can be improved.

[0174] Meanwhile, in the case where the shape deformation layer (120) and the first deformation limitation layer (140) are sequentially provided on the lower part of the four-piece body (110), the minimum size, maximum size, and thickness of the shape deformation layer (120) and the first deformation limitation layer (140) provided on the lower part of the four-piece body (110) can be limited to solve problems such as inconvenience in pressurizing and attaching the four-piece body (110) to a fingernail, hair getting caught, and contamination by foreign substances.

[0175] Referring to Fig. 14, the central thickness (T1) of the shape deformation layer (120) may be 0.05 to 5.0 mm, and preferably 0.1 to 2.0 mm. In addition, the thickness of the shape deformation layer (120) may be formed to become thinner from the center to the edge.

[0176] If the central thickness (T1) of the shape deformation layer (120) exceeds 5.0 mm, hair entanglement may increase and the wearing comfort may deteriorate, and if the central thickness (T1) of the shape deformation layer (120) is less than 0.05 mm, the desired fit and adhesiveness cannot be obtained.

[0177] The minimum and maximum sizes of the shape deformation layer (120) can be expressed as a ratio of the length and width of the shape deformation layer (120) to the length and width of the four-body body (110).

[0178] Referring to FIG. 15, the ratio of the length (L2) of the shape deformation layer (120) to the length (L1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.09. The ratio of the width (W2) of the shape deformation layer (120) to the width (W1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.9.

[0179] That is, in the present embodiment, the minimum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 10% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 95% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 95% of the width (W1) of the four-piece body (110).

[0180] Referring to Fig. 14, the thickness (T3) of the first strain-limiting layer (140) may be 0.005 to 1.5 mm. Meanwhile, the thickness (T3) of the first strain-limiting layer (140) may be uniformly formed over the entire area or may vary within a range of 0.005 to 1.5 mm.

[0181] And, since the first deformation limiting layer (140) is arranged to surround the lower part of the shape deformation layer (120), the size of the first deformation limiting layer (140) is formed to be larger than the size of the shape deformation layer (120).

[0182] The minimum and maximum sizes of the first deformation limiting layer (140) can be expressed as a ratio of the length and width of the first deformation limiting layer (140) to the length and width of the four-body body (110).

[0183] Referring to FIG. 15, the ratio of the length (L4) of the first strain-limiting layer (140) to the length (L1) of the four-body (110) may be 0.1 to 1, and the ratio of the width (W4) of the first strain-limiting layer (140) to the width (W1) of the four-body (110) may be 0.1 to 1.

[0184] That is, in the present embodiment, the minimum size of the first strain-limiting layer (140) corresponds to the case where the length (L4) of the first strain-limiting layer (140) is 10% of the length (L1) of the four-piece body (110) and the width (W4) of the first strain-limiting layer (140) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the first strain-limiting layer (140) corresponds to the case where the length (L4) of the first strain-limiting layer (140) is 100% of the length (L1) of the four-piece body (110) and the width (W4) of the first strain-limiting layer (140) is 100% of the width (W1) of the four-piece body (110).

[0185] As described above, by adjusting the minimum and maximum sizes and thicknesses of the shape deformation layer (120) and the first deformation limitation layer (140), inconvenience, hair getting caught, contamination by foreign substances, etc. can be prevented when pressurizing and attaching the nail body (110) to a fingernail, etc. In this case, as described above, the first deformation limitation layer (140) is arranged to surround the lower part of the shape deformation layer (120), so the size of the first deformation limitation layer (140) is formed to be larger than the size of the shape deformation layer (120).

[0186]

[0187]

[0188] *The operation of attaching an artificial nail (100) according to the second embodiment of the present invention configured as described above to a fingernail or the like is described as follows.

[0189] FIG. 18 and FIG. 19 are diagrams showing the state of use of an artificial nail according to a second embodiment of the present invention, FIG. 20 is a cross-sectional view taken along the EE line of FIG. 19, showing the state of use of an artificial nail having a first deformation-limiting layer in which a second opening is formed, and FIG. 21 is a diagram showing the state of use of an artificial nail having a second full-color line according to a second embodiment of the present invention.

[0190] Referring to Fig. 18, first, a protective film (not shown) is peeled off from the first strain-limiting layer (140). When the protective film is peeled off, the first strain-limiting layer (140) is exposed. Then, the first strain-limiting layer (140) is pressed against the upper surface of a nail or the like, and the four-piece body (110) is pressed to attach the four-piece body (110) to the upper surface of the nail or the like.

[0191] Referring to FIG. 19, when the upper surface of the four-piece body (110) is pressed, the shape-deforming layer (120) having fluidity and flexibility is compressed and spread over the entire area of ​​the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and is deformed to fit the shape of the lower surface of the four-piece body (110) and the upper surface of the nail, etc., thereby filling the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., so that the four-piece body (110) does not rise from the upper surface of the nail, etc., thereby improving the wearing comfort and fit. At this time, the shape-deforming layer (120) moves or flows within the first deformation-limiting layer (140), and the first deformation-limiting layer (140) limits the deformation direction of the shape-deforming layer (140).

[0192] Meanwhile, when a second opening (142), a second perforation (144), or a second slot (145) is formed in the first deformation limiting layer (140) and the shape deformation layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., the shape deformation layer (120) can move or flow in the horizontal direction and the height direction of the four-piece body (110) beyond the first deformation limiting layer (140) through the second opening (142), the second perforation (144), or the second slot (145) formed in the first deformation limiting layer (140). For example, as illustrated in FIG. 20(a), when the first deformation limiting layer (140) surrounds the shape deformation layer (120) and the shape deformation layer (120) is pressurized, the shape deformation layer (120) spreads, moves, or flows within the first deformation limiting layer (140). In addition, as illustrated in FIG. 20(b), when the first deformation limiting layer (140) includes the second opening (142), when the shape deformation layer (120) is pressurized, the shape deformation layer (120) can be deformed, moved, or flowed in the free edge direction of a fingernail or the like through the second opening (142) of the first deformation limiting layer (140). In addition, although not illustrated, as described above, the shape deformation layer (120) can be deformed, moved, or flowed in the lateral direction of a fingernail or the like through the second opening (142) of the first deformation limiting layer (140).

[0193] In addition, when the second full-color line (141) is formed on the first deformation limiting layer (140) and the shape deformation layer (120) is deformed to fill the gap between the lower surface of the four-body body (110) and the upper surface of the nail, etc., when the first deformation limiting layer (140) is adhered to the nail, etc., a straight full-color line (see FIG. 21(a)) formed on the first deformation limiting layer (140) is cut, a straight full-color line (see FIG. 21(b)) formed by cutting the first deformation limiting layer (140) but having a predetermined width, a V-shaped notched full-color line (see FIG. 21(c)) formed by cutting the first deformation limiting layer (140) in a V shape, a U-shaped notched full-color line (see FIG. 21(d)) formed by cutting the first deformation limiting layer (140) in a U shape, and a full-color line mixed with a straight and notched shape (see FIG. The second full-color line (141) such as (see 21(e)) can prevent wrinkles, etc. from occurring in the first deformation-limiting layer (140).

[0194] And when the shape deformation layer (120) is deformed under pressure, a part of the shape deformation layer (120) flows into the second full color line (141) formed in the first deformation limiting layer (140), thereby allowing the shape deformation layer (120) to be deformed beyond the first deformation limiting layer (140). And when the shape deformation layer (120) is deformed to fill the second full color line (141), the user cannot visually identify the second full color line (141), thereby eliminating the aesthetic defect caused by forming the second full color line (141) in the first deformation limiting layer (140) and improving the aesthetic feel.

[0195] And, while the first deformation limiting layer (140) is adhered to the upper surface of the nail, etc., and the shape deformation layer (120) is deformed, the nail body (110) is maintained in a state of being attached to the upper surface of the nail, etc. And, while the first deformation limiting layer (140) is adhered to the nail, etc., and the shape deformation layer (120) is deformed, the shape deformation layer (120) and / or the first deformation limiting layer (140) are hardened.

[0196] As described above, the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc. is filled by the shape-deforming layer (120), so that the user's wearing comfort, the close contact and adhesiveness of the four-piece body (110) to the nail, etc., and the nail retention rate of the four-piece body (110) to the nail, etc. can be improved.

[0197]

[0198] Hereinafter, an artificial nail according to a third embodiment of the present invention will be described.

[0199] FIG. 22 is a perspective view of an artificial nail according to a third embodiment of the present invention, FIG. 23 is an exploded perspective view of an artificial nail according to a third embodiment of the present invention, FIG. 24 is a cross-sectional view taken along line FF of FIG. 22, FIG. 25 is a cross-sectional view taken along line GG of FIG. 22, and FIG. 26 is a rear view of an artificial nail according to a third embodiment of the present invention.

[0200] Referring to FIGS. 22 to 26, an artificial nail (100) according to a third embodiment of the present invention includes a four-body body (110), a shape-deforming layer (120) provided under the four-body body (110), a second deformation-limiting layer (140) provided under the shape-deforming layer (120), and a second adhesive layer (130) provided under the second deformation-limiting layer (140). In addition, the artificial nail (100) according to the third embodiment of the present invention may further include a protective film (not shown) provided under the second adhesive layer (130).

[0201] The four-piece body (110), the shape-deforming layer (120), the second adhesive layer (130), and the protective film according to the third embodiment of the present invention are the same as the four-piece body (110), the shape-deforming layer (120), the first adhesive layer (130), and the protective film according to the first embodiment of the present invention, and thus a detailed description thereof will be omitted. In addition, the second strain-limiting layer (140) according to the third embodiment of the present invention is the same as the first strain-limiting layer (140) according to the second embodiment of the present invention, and thus a detailed description thereof will be omitted. The differences will be described below.

[0202] In this embodiment, a shape deformation layer (120), a second deformation restriction layer (140), a second adhesive layer (130), and a protective film (not shown) are sequentially provided on the lower part of the four-body body (110).

[0203] The second deformation limiting layer (140) according to the present embodiment can support the shape deformation layer (120) and at the same time limit the deformation direction of the shape deformation layer (120). That is, the second deformation limiting layer (140) can limit at least one of the horizontal deformation and the height deformation of the shape deformation layer (120). The second deformation limiting layer (140) is provided below the shape deformation layer (120), and is arranged so that the edge is attached to the lower surface of the four-body body (110) along the edge of the shape deformation layer (120) and surrounds the shape deformation layer (120).

[0204] The second deformation limiting layer (140) may include at least one third opening (not shown) provided along the edge, a plurality of third perforations (not shown) arranged to be spaced apart from each other in the longitudinal and width directions of the four-piece body (110), and a plurality of third slots (not shown) arranged to be spaced apart from each other in the direction from one end of the four-piece body (110) corresponding to the cuticle layer of the fingernail or toenail to the other end of the four-piece body (110) corresponding to the free edge of the fingernail or toenail. Since the third opening, the third perforation, and the third slot formed in the second deformation limiting layer (140) are the same as the second opening (142), the second perforation (144), and the second slot (145) formed in the first deformation limiting layer (140) according to the second embodiment, a detailed description thereof will be omitted.

[0205] In addition, the second strain-limiting layer (140) may include a plurality of third wan-color lines (141) cut from the outer side of the second strain-limiting layer (140) to penetrate the second strain-limiting layer (140) in an inward direction. The third wan-color lines (141) formed in the second strain-limiting layer (140) are the same as the second wan-color lines (141) formed in the first strain-limiting layer (140) according to the second embodiment, and thus a detailed description thereof will be omitted.

[0206] The second adhesive layer (130) according to the present embodiment is provided on the lower part of the second deformation-limiting layer (140) and is adhered to the upper surface of a fingernail or the like. In addition, the second adhesive layer (130) is arranged to surround the lower part of the second deformation-limiting layer (140). In addition, the second adhesive layer (130) can control the deformation direction of the shape-deforming layer (120) when the nail body (110) is pressed and the shape-deforming layer (120) is deformed. In the case where the second adhesive layer (130) controls the deformation direction of the shape-deforming layer (120), it is assumed that the shape-deforming layer (120) moves or flows beyond the second deformation-limiting layer (140) to the second adhesive layer (130) through the third opening, the third perforation, the third slot, and the third full-collar line (141) of the second deformation-limiting layer (140).

[0207] The second adhesive layer (130) may include at least one fourth opening (not shown) provided along the edge, a plurality of fourth perforations (not shown) arranged to be spaced apart from each other in the longitudinal and width directions of the four-piece body (110), and a plurality of fourth slots (not shown) arranged to be spaced apart from each other in the direction from one end of the four-piece body (110) corresponding to the cuticle layer of the fingernail or toenail to the other end of the four-piece body (110) corresponding to the free edge of the fingernail or toenail. The third opening, the third perforation, and the third slot formed in the second adhesive layer (130) are the same as the first opening (132), the first perforation (134), and the first slot (135) formed in the first adhesive layer (130) according to the first embodiment, and therefore, a detailed description thereof will be omitted.

[0208] In addition, the second adhesive layer (130) may include a plurality of fourth wainlines (131) cut from the outside to the inside of the first adhesive layer (130) so as to penetrate the first adhesive layer (130). The fourth wainlines (131) formed in the second adhesive layer (130) are the same as the first wainlines (131) formed in the first adhesive layer (130) according to the first embodiment, and thus a detailed description thereof will be omitted.

[0209] In this embodiment, a second adhesive layer (130) is provided under a second deformation-limiting layer (140) to increase adhesive strength and closeness to the upper surface of a nail, etc. In addition, when the shape-deforming layer (120) and / or the second deformation-limiting layer (140) are cured and the shape-deforming layer (120) and / or the second deformation-limiting layer (140) themselves are slightly contracted or deformed, the second adhesive layer (130) can serve as a buffer for the contraction or deformation of the shape-deforming layer (120) and / or the second deformation-limiting layer (140).

[0210] Since the present embodiment is structured such that the second adhesive layer (130) wraps around the second strain-limiting layer (140), the size of the second adhesive layer (130) is formed to be larger than the size of the second strain-limiting layer (140) so that the second adhesive layer (130) wraps around the second strain-limiting layer (140).

[0211] Therefore, when the second deformation limiting layer (140) includes a third opening, a third perforation, a third slot, or a third full-color line (141), when the shape-deforming layer (120) is pressurized and deformed, the shape-deforming layer (120) can move or flow toward the second adhesive layer (130) through the third opening, the third perforation, the third slot, or the third full-color line (141). At this time, since the second adhesive layer (130) is arranged to surround the second deformation limiting layer (140), the shape-deforming layer (120) can move or flow between the second deformation limiting layer (140) and the second adhesive layer (130). And when the second adhesive layer (130) includes a fourth opening, a fourth perforation, a fourth slot, or a fourth full-color line (131), the shape-deforming layer (120) can be controlled to move or flow outward of the second adhesive layer (130) through the fourth opening, the fourth perforation, the fourth slot, or the fourth full-color line (131). In addition, the shape-deforming layer (120) can move or flow outward of the second adhesive layer (130) depending on the degree of deformation of the shape-deforming layer (120). For example, when the degree of deformation of the shape deformation layer (120) is large, that is, when the shape deformation layer (120) receives a large pressure in a specific direction and the amount of movement or flow in the specific direction is large, the adhesive region between the upper surface of the edge of the second adhesive layer (130) and the lower surface of the four-piece body (110) is released from the adhesive due to the pressure resulting from the deformation or movement of the shape deformation layer (120), and thus the shape deformation layer (120) can move or flow between the second adhesive layer (130) and the four-piece body (110).

[0212] Meanwhile, in the case where the shape deformation layer (110), the second deformation limitation layer (140), and the second adhesive layer (130) are sequentially provided on the lower part of the four-body body (110), the minimum size, maximum size, and thickness of the shape deformation layer (110), the second deformation limitation layer (140), and the second adhesive layer (130) can be limited to solve problems such as inconvenience in attaching the four-body body (110) to a fingernail, etc., hair getting caught, and contamination by foreign substances.

[0213] Referring to Fig. 25, the central thickness (T1) of the shape deformation layer (120) may be 0.05 to 5.0 mm, and preferably 0.1 to 2.0 mm. In addition, the thickness of the shape deformation layer (120) may be formed to become thinner from the center to the edge.

[0214] If the central thickness (T1) of the shape deformation layer (120) exceeds 5.0 mm, hair entanglement may increase and the wearing comfort may deteriorate, and if the central thickness (T1) of the shape deformation layer (120) is less than 0.05 mm, the desired fit and adhesiveness cannot be obtained.

[0215] The minimum and maximum sizes of the shape deformation layer (120) can be expressed as a ratio of the length and width of the shape deformation layer (120) to the length and width of the four-body body (110).

[0216] Referring to FIG. 26, the ratio of the length (L2) of the shape deformation layer (120) to the length (L1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.9. In addition, the ratio of the width (W2) of the shape deformation layer (120) to the width (W1) of the four-body body (110) may be 0.1 to 0.95, and preferably 0.25 to 0.9.

[0217] That is, in the present embodiment, the minimum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 10% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the shape deformation layer (120) corresponds to the case where the length (L2) of the shape deformation layer (120) is 95% of the length (L1) of the four-piece body (110) and the width (W2) of the shape deformation layer (120) is 95% of the width (W1) of the four-piece body (110).

[0218] Referring to Fig. 25, the thickness (T3) of the second strain-limiting layer (140) may be 0.005 to 1.5 mm. Meanwhile, the thickness (T3) of the second strain-limiting layer (140) may be uniformly formed over the entire area or may vary within a range of 0.005 to 1.5 mm.

[0219] And, since the second deformation limiting layer (140) is arranged to surround the lower part of the shape deformation layer (120), the size of the second deformation limiting layer (140) is formed to be larger than the size of the shape deformation layer (120).

[0220] The minimum and maximum sizes of the second deformation limiting layer (140) can be expressed as a ratio of the length and width of the second deformation limiting layer (140) to the length and width of the four-body body (110).

[0221] Referring to FIG. 26, the ratio of the length (L4) of the second strain-limiting layer (140) to the length (L1) of the four-piece body (110) may be 0.1 to 1. And, the ratio of the width (W4) of the second strain-limiting layer (140) to the width (W1) of the four-piece body (110) may be 0.1 to 1. That is, in the present embodiment, the minimum size of the second strain-limiting layer (140) corresponds to a case where the length (L4) of the second strain-limiting layer (140) is 10% of the length (L1) of the four-piece body (110) and the width (W4) of the second strain-limiting layer (140) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the second deformation limiting layer (140) corresponds to the case where the length (L4) of the second deformation limiting layer (140) is less than 100% of the length (L1) of the four-body (110) and the width (W4) of the second deformation limiting layer (140) is 100% of the width (W1) of the four-body (110).

[0222] Referring to Fig. 25, the thickness (T2) of the second adhesive layer (130) may be 0.05 to 1.5 mm. Meanwhile, the thickness (T2) of the second adhesive layer (130) may be uniformly formed over the entire area or may vary within a range of 0.05 to 1.5 mm.

[0223] And, since the second adhesive layer (130) is arranged to surround the lower part of the second strain-limiting layer (140), the size of the second adhesive layer (130) is formed to be larger than the size of the second strain-limiting layer (140).

[0224] The minimum and maximum sizes of the second adhesive layer (130) can be expressed as a ratio of the length and width of the second adhesive layer (130) to the length and width of the four-body body (110).

[0225] Referring to FIG. 26, the ratio of the length (L3) of the second adhesive layer (130) to the length (L1) of the four-body body (110) may be 0.1 to 1. In addition, the ratio of the width (W3) of the second adhesive layer (130) to the width (W1) of the four-body body (110) may be 0.1 to 1.

[0226] That is, in the present embodiment, the minimum size of the second adhesive layer (130) corresponds to the case where the length (L3) of the second adhesive layer (130) is 10% of the length (L1) of the four-piece body (110) and the width (W3) of the second adhesive layer (130) is 10% of the width (W1) of the four-piece body (110). In addition, the maximum size of the second adhesive layer (130) corresponds to the case where the length (L3) of the second adhesive layer (130) is 100% of the length (L1) of the four-piece body (110) and the width (W3) of the second adhesive layer (130) is 100% of the width (W1) of the four-piece body (110).

[0227] As described above, by controlling the minimum size, maximum size, and thickness of the shape deformation layer (120), the second deformation limitation layer (140), and the second adhesive layer (130), it is possible to prevent inconvenience, hair getting caught, contamination by foreign substances, etc. when pressurizing and attaching the nail plate (110) to a fingernail, etc. At this time, since the second deformation limitation layer (140) is arranged to surround the lower part of the shape deformation layer (120), the size of the second deformation limitation layer (140) is formed to be larger than that of the shape deformation layer (120), and since the second adhesive layer (130) is arranged to surround the lower part of the second deformation limitation layer (140), the size of the second adhesive layer (130) is formed to be larger than that of the second deformation limitation layer (140).

[0228]

[0229] The operation of attaching an artificial nail (100) according to the third embodiment of the present invention configured as described above to a fingernail or the like is described as follows.

[0230] FIG. 27 and FIG. 28 are diagrams showing the state of use of an artificial nail according to a third embodiment of the present invention, and FIG. 29 is a diagram showing the state of use of an artificial nail having a third full color line and a fourth full color line according to a third embodiment of the present invention.

[0231] Referring to Fig. 27, first, a protective film (not shown) is peeled off from the second adhesive layer (130). When the protective film is peeled off, the second adhesive layer (130) is exposed. Then, the second adhesive layer (130) is pressed against the upper surface of a nail or the like, and the four-piece body (110) is pressed to attach the four-piece body (110) to the upper surface of the nail or the like.

[0232] Referring to FIG. 28, when the upper surface of the four-piece body (110) is pressed, the shape-deforming layer (120) having fluidity and flexibility is compressed and spread over the entire area of ​​the lower surface of the four-piece body (110) and the upper surface of the nail, etc., and is deformed to fit the shape of the lower surface of the four-piece body (110) and the upper surface of the nail, etc., thereby filling the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., so that the four-piece body (110) does not lift off the upper surface of the nail, etc., thereby improving the wearing comfort and close fit, etc. At this time, the shape-deforming layer (120) moves or flows within the second deformation-limiting layer (140), and the second deformation-limiting layer (140) limits the deformation of the shape-deforming layer (140). In addition, the second adhesive layer (130) serves to attach the four-piece body (110) to the upper surface of the nail, etc.

[0233] Meanwhile, although not shown, when a third opening, a third perforation, or a third slot is formed in the second deformation limiting layer (140) and the shape deformation layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., some of the shape deformation layer (120) may move or flow in the horizontal direction and the height direction of the four-piece body (110) within the second deformation limiting layer (140), and the remainder of the shape deformation layer (120) may move or flow in the horizontal direction and the height direction of the four-piece body (110) between the second deformation limiting layer (140) and the second adhesive layer (130) beyond the second deformation limiting layer (140) through the third opening, the third perforation, or the third slot formed in the second deformation limiting layer (140).

[0234] In addition, when a third full-color line (141) is formed in the second deformation-limiting layer (140) and the shape-deforming layer (120) is deformed to fill the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc., some of the shape-deforming layer (120) may move or flow in the horizontal direction and the height direction of the four-piece body (110) within the second deformation-limiting layer (140), and the remainder of the shape-deforming layer (120) may move or flow in the horizontal direction and the height direction of the four-piece body (110) between the second deformation-limiting layer (140) and the second adhesive layer (130) beyond the second deformation-limiting layer (140) through the third full-color line (141) formed in the second deformation-limiting layer (140). At this time, when the shape deformation layer (120) is deformed to fill the third full color line (141), the user cannot visually identify the third full color line (141), so the aesthetic defect caused by forming the third full color line (141) in the second deformation restriction layer (140) can be resolved and the aesthetic feel can be improved.

[0235] As described above, when a third opening, a third perforation, a third slot, or a third full-color line (141) is formed in the second deformation-limiting layer (140), when the shape-deforming layer (120) is deformed under pressure, a part of the shape-deforming layer (120) spreads, moves, or flows between the second deformation-limiting layer (140) and the second adhesive layer (130) through the third opening, the third perforation, the third slot, or the third full-color line (141). And the shape-deforming layer (120) that moves or flows between the second deformation-limiting layer (140) and the second adhesive layer (130) can move or flow between the four-piece body (110) and the second adhesive layer (130) to fill a gap between the longitudinal and / or widthwise ends of the four-piece body (110) and the longitudinal and / or widthwise ends of a fingernail, etc.

[0236] Meanwhile, in the case where a part of the shape deformation layer (120) moves or flows between the second deformation limitation layer (140) and the second adhesive layer (130) by the third opening, the third perforation, the third slot, or the third full-color line (141) of the second deformation limitation layer (140), a fourth opening, a fourth perforation, or a fourth slot may be formed in the second adhesive layer (130) to control the deformation direction of the shape deformation layer (120). The shape deformation layer (120) moves or flows in the horizontal direction and the height direction of the four-body body (110) through the fourth opening, the fourth perforation, or the fourth slot formed in the second adhesive layer (130), and the amount of movement or flow of the shape deformation layer (120) is controlled through the fourth opening, the fourth perforation, or the fourth slot of the second adhesive layer (130), thereby controlling the deformation direction of the shape deformation layer (120). Additionally, a fourth full color line (131) can be formed on the second adhesive layer (130) to control the deformation direction of the wrinkle prevention and shape deformation layer (120) of the second adhesive layer (130).

[0237] As illustrated in FIG. 29, when a third full color line (141) is formed in the second deformation-limiting layer (140), a fourth full color line (141) is formed in the second adhesive layer (130), and the four-body body (110) is pressed to deform the shape-deforming layer (120), some of the shape-deforming layer (120) moves or flows in the horizontal direction and the height direction within the second deformation-limiting layer (140), and the remainder of the shape-deforming layer (120) moves or flows between the second deformation-limiting layer (140) and the second adhesive layer (130) through the third full color line (141) of the second deformation-limiting layer (140), and the shape-deforming layer (120) that has moved or flowed between the second deformation-limiting layer (140) and the second adhesive layer (130) can flow into the fourth full color line (131) formed in the second adhesive layer (130). When the shape deformation layer (120) fills the third full color line (141) and the fourth full color line (131), the user cannot visually identify the third full color line (141) and the fourth full color line (131), thereby eliminating the aesthetic defect caused by forming the third full color line (141) and the fourth full color line (131) and improving the aesthetic feel.

[0238] The second adhesive layer (130) is adhered to the nail, etc., and the shape-deforming layer (120) is deformed, so that the four-body body (110) is maintained in a state of being attached to the upper surface of the nail, etc. In addition, the shape-deforming layer (120) and / or the second deformation-limiting layer (140) can be cured in a state where the second adhesive layer (130) is adhered to the upper surface of the nail, etc., and the shape-deforming layer (120) is deformed, so that the four-body body (110) is maintained in a state of being attached to the upper surface of the nail, etc.

[0239] As described above, the gap between the lower surface of the four-piece body (110) and the upper surface of the nail, etc. is filled by the shape-deforming layer (120), so that the user's wearing comfort, the close contact and adhesiveness of the four-piece body (110) to the nail, etc., and the nail retention rate of the four-piece body (110) to the nail, etc. can be improved.

[0240]

[0241] As such, the present invention is not limited to the described embodiments, and it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Accordingly, such modifications or variations should fall within the scope of the claims of the present invention.

[0242] [Explanation of symbols]

[0243] 100: Artificial nails 110: Nail polish

[0244] 120: Shape deformation layer 130: First adhesive layer, second adhesive layer

[0245] 140: First strain-limited layer, second strain-limited layer

[0246] The artificial nail according to the present invention can improve the wearing comfort regardless of the various shapes of fingernails and the like, and can also improve the adhesiveness and nail retention rate.

Claims

four Japanese characters; and An artificial nail comprising a shape-deforming layer provided on the lower part of the nail body, wherein when the nail body is attached to a fingernail or toenail by being pressed, the lower surface is deformed into a shape corresponding to the upper surface shape of the fingernail or toenail, and the upper surface is deformed into a shape corresponding to the lower surface shape of the nail body, thereby filling the gap between the lower surface of the nail body and the upper surface of the fingernail or toenail. In the first paragraph, The thickness of the center of the shape deformation layer is 0.05 to 5.0 mm, and the thickness of the shape deformation layer becomes thinner from the center to the edge. An artificial nail in which the ratio of the length of the shape deformation layer to the length of the four-body body is 0.1 to 0.95, and the ratio of the width of the shape deformation layer to the width of the four-body body is 0.1 to 0.

95. In the first paragraph, The above shape deformation layer is 0.01 to 10 kgf / cm 2 Artificial nails with a Young's modulus of . In the first paragraph, An artificial nail in which the shape-deforming layer is laminated on the upper surface of a fingernail or toenail and then hardened. In the first paragraph, An artificial nail further comprising a first adhesive layer provided on the lower portion of the shape-deforming layer and adhered to the upper surface of a fingernail or toenail, arranged to surround the lower portion of the shape-deforming layer, and controlling the deformation direction of the shape-deforming layer when the nail body is pressed and the shape-deforming layer is deformed. In paragraph 5, The thickness of the first adhesive layer is 0.05 to 1.5 mm, The ratio of the length of the first adhesive layer to the length of the four-body body is 0.1 to 1, An artificial nail in which the ratio of the width of the first adhesive layer to the width of the above-mentioned nail body is 0.1 to 1. In paragraph 5, The above first adhesive layer is, An artificial nail comprising a plurality of first full-color lines cut through the first adhesive layer from the outer side to the inner side of the first adhesive layer. In paragraph 5, The above first adhesive layer is, An artificial nail comprising at least one first opening provided along a border. In paragraph 5, The above first adhesive layer is, An artificial nail comprising a plurality of first perforations spaced apart from each other in the longitudinal and width directions of the above-mentioned four-body body. In paragraph 5, The above first adhesive layer is, An artificial nail comprising a plurality of first slots arranged to be spaced apart from each other in the direction from one end of the nail body corresponding to the cuticle layer of the fingernail or toenail to the other end of the nail body corresponding to the free edge of the fingernail or toenail. In the first paragraph, An artificial nail further comprising a first deformation limiting layer provided on the lower portion of the shape deformation layer and adhered to the upper surface of the fingernail or toenail, the edge of which is attached to the lower surface of the nail body along the edge of the shape deformation layer and arranged to surround the shape deformation layer, and which supports the shape deformation layer and limits the deformation direction of the shape deformation layer. In Article 11, The thickness of the first deformation limiting layer is 0.005 to 1.5 mm, The ratio of the length of the first deformation limiting layer to the length of the above four-body body is 0.1 to 1, An artificial nail in which the ratio of the width of the first deformation-limiting layer to the width of the above-mentioned four-body body is 0.1 to 1. In Article 11, The above first strain limiting layer is 0.03 to 60 kgf / cm 2 Artificial nails with a Young's modulus of . In Article 11, An artificial nail wherein the first deformation-limiting layer is laminated on the upper surface of a fingernail or toenail and then curable. In Article 11, The above first deformation limiting layer is, An artificial nail comprising a plurality of second full-color lines cut through the first deformation-limiting layer from the outside to the inside of the first deformation-limiting layer. In Article 11, The above first deformation limiting layer is, An artificial nail comprising at least one second opening provided along the edge. In Article 16, The above second opening is an artificial nail formed so that the cross-sectional area on the inlet side is larger than the cross-sectional area on the outlet side. In Article 11, The above first deformation limiting layer is, An artificial nail comprising a plurality of second perforations spaced apart from each other in the longitudinal and width directions of the above-mentioned four-body body. In Article 18, The cross-sectional areas of the plurality of second perforations are the same or different from each other. In Article 11, The above first deformation limiting layer is, An artificial nail comprising a plurality of second slots arranged to be spaced apart from each other in the direction from one end of the nail body corresponding to the cuticle layer of the fingernail or toenail to the other end of the nail body corresponding to the free edge of the fingernail or toenail. In the first paragraph, A second deformation limiting layer provided on the lower portion of the shape deformation layer, the edge of which is attached to the lower surface of the four-body body along the edge of the shape deformation layer and arranged to surround the shape deformation layer, and which supports the shape deformation layer and limits the deformation direction of the shape deformation layer; and An artificial nail further comprising a second adhesive layer provided on the lower portion of the second deformation-limiting layer and adhered to the upper surface of a fingernail or toenail, arranged to surround the lower portion of the second deformation-limiting layer, and controlling the deformation direction of the shape-deforming layer when the nail body is pressed and the shape-deforming layer is deformed. In Article 21, The thickness of the second deformation limiting layer is 0.005 to 1.5 mm, The ratio of the length of the second deformation-limiting layer to the length of the above four-body body is 0.1 to 1, The ratio of the width of the second deformation limiting layer to the width of the above four-body body is 0.1 to 1, The thickness of the second adhesive layer is 0.05 to 1.5 mm, The ratio of the length of the second adhesive layer to the length of the above four-body body is 0.1 to 1, An artificial nail in which the ratio of the width of the second adhesive layer to the width of the above-mentioned nail body is 0.1 to 1. In Article 21, The second deformation limiting layer is, An artificial nail comprising a plurality of third full-color lines cut through the second deformation-limiting layer from the outside to the inside of the second deformation-limiting layer. In Article 21, The second adhesive layer is, An artificial nail comprising a plurality of fourth full-color lines cut through the second adhesive layer from the outer side to the inner side of the second adhesive layer.

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