Combination of transfer nail tape and transfer spatula

Abstract

To provide a combination (a set) of a transfer nail tape and a transfer spatula capable of transferring gloss and decoration to a nail surface according to nails of various sizes and shapes, even when it is in contact with the nail, correcting a pasting position by moving it on the nail, even when adhesive strength of an adhesive layer is sufficient to correct the position on the nail surface, firmly pasting a transfer layer to the nail by using an elastomer spatula, and firmly transferring it only to a necessary part.SOLUTION: A transfer nail tape is formed by laminating at least a transparent resin layer and an adhesive layer on a base material in order of the transparent layer and the adhesive layer from the base material side, where adhesive strength of the adhesive layer is 0.05 N / 25 mm width or more and 0.5 N / 25 mm width or less. A combination of the transfer nail tape and the transfer spatula can transfer the transparent layer and the adhesive layer from the base material to the nails by pressing the transfer nail tape on an opposite side of the adhesive layer with the transfer spatula consisting primarily of an elastomer and having Vickers hardness of 43 HV or more and 70 HV or less.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a combination of a transfer nail tape, which is a transfer sheet for decorating nails by transferring a transfer layer that imparts gloss and decoration to the surface of the nail, and a transfer spatula used for the transfer. [Background technology]

[0002] Transfer tapes for imparting luster and decoration to the surfaces of fingernails and toenails have been proposed. Patent Document 1 proposes a nail decoration transfer sheet with a nail adhesive piece, at least one end of which is formed in a generally arc shape that roughly conforms to the cuticle. Patent Document 2 also proposes a nail decoration transfer sheet characterized by an adhesive layer formed smaller than the average surface area of ​​the nail.

[0003] Patent Document 1 describes that by providing at least one end of the nail decoration transfer sheet with a nail adhesive piece that is formed in an approximately arc shape that roughly follows the cuticle, and by transferring the approximately arc-shaped edge of one end along the cuticle, the shape of the cuticle part that is the most difficult to cut to fit the shape of the nail can be easily adjusted to the nail, and that if the nail adhesive piece is formed to be approximately the same width as the nail, the part that needs to be cut to fit the nail will only be the tip edge of the nail, and the nail can be covered very easily just by tearing off the transfer layer to fit the edge of the nail.

[0004] Furthermore, Patent Document 2 states that if the adhesive layer (6) is larger than the surface area of ​​the nail (5), it will adhere not only to the nail (5) but also to other skin parts of the finger, making it troublesome to remove it, and therefore it is preferable to make the adhesive layer (6) smaller than the average surface area of ​​the nail (5) to prevent it from adhering to parts other than the nail (5).

[0005] As described above, various transfer nail tapes have been proposed for attaching a transfer layer to the nail surface (gloss or decoration) according to the shape and size of the nail. However, in the nail decoration transfer sheet of Patent Document 1, one end is merely formed in a roughly arc shape that generally follows the cuticle, so the nail adhesive piece does not fit the shape and size of many nails.

[0006] In addition, in the nail decoration transfer paper of Patent Document 2, the adhesive layer is formed smaller than the average surface area of ​​the nail, which results in areas where the adhesive layer is absent at the edge of the nail, and the nail decoration transfer layer at the edge of the nail may peel off. As such, there has been no conventional transfer nail tape that can be adapted to various nail shapes and sizes, and that can reliably attach the transfer layer to the edge of the nail without protruding beyond the edge of the nail.

[0007] In addition, both the nail decoration transfer sheet of Patent Document 1 and the nail decoration transfer paper of Patent Document 2 use the adhesive strength of the adhesive layer to fix the transfer layer to the nail. In order to fix the transfer layer to the nail using the adhesive strength of the adhesive layer, if the adhesive layer does not have sufficient adhesive strength, the transfer layer will easily peel off from the nail. Therefore, conventional transfer nail sheets use an adhesive layer with sufficient adhesive strength to fix the transfer layer to the nail simply by contacting the adhesive layer with the nail. Therefore, if the transfer layer is applied in a state different from the intended state, such as when the decoration on the transfer layer extends beyond the nail or when the decoration on the transfer layer is tilted compared to the intended state, the transfer layer must be peeled off the nail and reapplied.

[0008] However, when the transfer layer is peeled off from the nail to be re-applied, the adhesive layer leaves glue on the nail, reducing the adhesive strength of the adhesive layer, which means that the transfer layer will not adhere sufficiently to the nail when re-applied, and if the transfer layer is thin, peeling it off from the nail can cause wrinkles in the transfer layer, resulting in an unsightly appearance. For this reason, it is preferable that the position of the transfer layer on the nail surface can be adjusted while the adhesive layer is in contact with the nail.

[0009] The nail sticker in Patent Document 3 is a sticker that applies gel paint to the surface of the nail, minimizing the area of ​​the nail surface that comes into direct contact with the gel paint and minimizing damage to the nail surface when the gel paint is removed from the nail, and does not impart gloss or decoration to the nail surface. However, Patent Document 3 describes adjusting the position of the nail adhesive film of the nail sticker that is adhesively placed on the nail surface via a temporary adhesive layer. However, the nail sticker in Patent Document 3 adjusts the position of the nail adhesive film by adding water, and there was no transfer tape that could adjust the position while the adhesive layer was in contact with the nail without using special means such as adding water. [Prior art documents] [Patent documents]

[0010] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-225496 [Patent Document 2] Japanese Utility Model Application Publication No. 62-194099 [Patent Document 3] Japanese Patent Application Publication No. 2019-506267 Summary of the Invention [Problem to be solved by the invention]

[0011] The present invention has been made in consideration of the above circumstances, and the problem to be solved by the present invention is to be able to transfer gloss and decoration to the surface of nails of various sizes and shapes, and to be able to adjust the attachment position by moving it on the nail even while it is in contact with the nail, and even if the adhesive strength of the adhesive layer is such that it can be adjusted on the nail surface, by using an elastomer spatula, the transfer layer can be firmly attached to the nail and transferred only to the required area. To provide a combination (set) of transfer nail tape and transfer spatula. [Means for solving the problem]

[0012] The first invention is a transfer nail tape in which at least a transparent resin layer and an adhesive layer are laminated on a substrate in the order of the transparent resin layer and the adhesive layer from the substrate side, and the adhesive strength of the adhesive layer is 0.05 N / 25 mm width or more and 0.5 N / 25 mm width or less, The thickness of the transparent resin layer is 5 μm or more and 20 μm or less, With the adhesive layer in contact with the nail, the transfer nail tape on the side opposite to the adhesive layer is pressed with a transfer spatula containing elastomer as a main component and having a Vickers hardness of 43 HV or more and 70 HV or less, thereby removing the transparent resin layer and the adhesive layer from the substrate. , and separate the transfer nail tape from the surrounding area that is not transferred to the nail; The transfer nail tape is characterized by being transferable onto the nail, and the transfer spatula is a combination of the transfer nail tape and the transfer spatula.

[0013] The second invention is a combination of the transfer nail tape and transfer spatula described in the first invention, characterized in that the adhesive layer contains resin particles in a proportion of 2.8% by weight or more and 10.2% by weight or less of the solid content of the adhesive layer.

[0014] The third invention is a combination of the transfer nail tape and transfer spatula according to the second invention, characterized in that the particle diameter of the resin particles is 0.5 μm or more and 3.1 μm or less. [Effects of the Invention]

[0015] In this invention, the transfer layer of the transfer nail tape is functionally separated into an adhesive layer and a transparent resin layer, and the adhesive strength of the adhesive layer is set to 0.05 N / 25 mm width or more and 0.5 N / 25 mm width or less, so that the tape can be moved and the application position corrected even when the adhesive layer is in contact with the nail, regardless of the color or decoration of the transparent resin layer. Furthermore, even if the adhesive strength of the adhesive layer is such that the position can be corrected on the nail surface, by using an elastomer spatula with a Vickers hardness of 43 HV or more and 70 HV or less, the transfer layer can be firmly attached to the nail and transferred only to the desired areas, making it possible to provide a combination (set) of transfer nail tape and transfer spatula that can transfer the transfer layer to nails of various sizes and shapes. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 1 is a diagram showing the layer structure of transfer nail tape A, which is an example of the transfer nail tape of the present invention. [Figure 2] 1 is a diagram showing the shape of transfer spatula B, which is an example of a transfer spatula used with the transfer nail tape of the present invention. FIG. [Figure 3] FIG. 10 is a diagram illustrating an evaluation method for alignment evaluation. DETAILED DESCRIPTION OF THE INVENTION

[0017] The combination of the transfer nail tape and transfer spatula of the present invention will be described in more detail below.

[0018] [Transfer nail tape] The transfer nail tape of the present invention is a transfer nail tape in which at least a transparent resin layer and an adhesive layer are laminated on a substrate in the order of the transparent resin layer and the adhesive layer from the substrate side. By transferring the adhesive layer and the transparent resin layer from the substrate of the transfer nail tape of the present invention to the nail, it is possible to impart gloss to the surface of the nail. Furthermore, by providing a decorative layer such as a printed layer between the adhesive layer and the transparent resin layer, it is possible to impart a decorative layer such as a printed layer to the nail in addition to gloss.

[0019] Transfer nail tape A, an example of a transfer nail tape of the present invention, is shown in Figure 1. As shown in Figure 1, the transfer nail tape of the present invention is a transfer nail tape in which a transparent resin layer (11) and an adhesive layer (12) are laminated in this order from the substrate side on one side of a substrate (10). The transfer nail tape of the present invention may further include a decorative layer, such as a printed layer, between the transparent resin layer (11) and the substrate (10) or between the transparent resin layer (11) and the adhesive layer (12). If the decorative layer, such as a printed layer, is transferred together with the transparent resin layer during transfer, the nail can be decorated in addition to gloss. The transfer nail tape of the present invention may also include a release layer between the substrate (10) and the transparent resin layer (11). The release layer improves the transferability of the transparent resin layer (11) and the adhesive layer (12) from the substrate (10) to the nail. When a transfer layer to be transferred to the nail together with the transparent resin layer (11) such as a decorative layer is provided between the transparent resin layer (11) and the substrate (10) as described above, a release layer may be provided between the transfer layer closest to the substrate (10) such as a decorative layer and the substrate (10). Also, to prevent dirt and dust from adhering to the adhesive layer, a separator that can be peeled off from the adhesive layer may be provided on the adhesive layer.

[0020] (base material) The substrate used in the transfer nail tape of the present invention can be a polyester film such as polyethylene terephthalate film or polyethylene naphthalate film, a polyolefin film such as polypropylene film or polyethylene film, a polyimide film, a polyetherimide film, a polycarbonate film, a polyamide film, an aramid film, or any other plastic film commonly used as a substrate for this type of transfer film. The thickness of the substrate is preferably 10 to 50 μm, more preferably 15 to 35 μm. If the substrate thickness is less than 10 μm, the transparent resin layer is likely to crack when laminated onto the substrate. On the other hand, if the substrate thickness exceeds 50 μm, it becomes difficult to fit the transfer nail tape to the curved surface of the nail, making it difficult to transfer the transparent resin layer (11) to the nail and making the transparent resin layer transferred to the nail prone to wrinkles.

[0021] (Transparent resin layer) The transparent resin layer is a layer that is transferred to the nail to impart gloss to the nail. When no release layer is provided between the substrate and the transparent resin layer, it preferably also has the ability to be peeled off from the substrate and is also preferably a layer that can be easily laminated onto the substrate. From the viewpoint of being easily laminated onto the substrate, the transparent resin layer is preferably a layer whose main component is resin. Among various resins, vinyl chloride-vinyl acetate copolymer resin, urethane resin, thermoplastic acrylic resin, thermosetting acrylic resin, UV-curable acrylic resin, etc. are preferred from the viewpoint of being able to impart gloss to the nail. Furthermore, UV-curable acrylic resin is preferred among these because UV curing can adjust the peeling ability from the substrate and make the outer layer on the nail surface less susceptible to scratches.

[0022] The thickness of the transparent resin layer (thickness after drying, hereinafter the same) is preferably 5 μm to 20 μm, more preferably 5 μm to 15 μm. A transparent resin layer thickness of less than 5 μm does not provide sufficient gloss. Furthermore, a transparent resin layer thickness of more than 20 μm is prone to air bubbles forming within the transparent resin layer. When the transparent resin layer is stretched, particularly when transferred to a curved surface, the air bubbles become noticeable within the transparent resin layer, resulting in a poor appearance. Furthermore, after transferring a transfer layer containing a transparent resin layer to a nail, when the transfer nail tape is peeled off from the nail in the portion not transferred to the nail, if the transparent resin layer does not cut well at the boundary between the portion transferred to the nail and the surrounding transparent resin layer not transferred to the nail, burrs will form around the transferred transfer layer, resulting in an unsightly appearance. However, if the thickness of the transparent resin layer exceeds 20 μm, the film strength of the transparent resin layer will be too high, resulting in poor cutting of the transparent resin layer at the boundary between the transparent resin layer and the surrounding transparent resin layer, making burrs more likely to form around the transferred transfer layer.

[0023] The transparent resin layer may contain various coloring materials in addition to the resin component. By containing coloring materials in the transparent resin layer, the nail surface can be decorated with various colors. Examples of coloring materials used in the transparent resin layer include various pigments and dyes, but pigments and dyes that are commonly used in cosmetics are preferred, and pigments and dyes that are highly safe for the skin are more preferred.

[0024] The transparent resin layer can be formed by dispersing or dissolving the above-mentioned materials in an appropriate solvent to prepare a coating solution, applying the solution to a substrate by a known method such as roll coating, reverse roll coating, gravure coating, reverse gravure coating, bar coating, or rod coating to form a coating film, and then drying the coating film. When a UV-curable resin is used, the transparent resin layer can be cured by irradiating the coating film with UV light after it has been formed.

[0025] The transparent resin layer may contain various additives within a range that does not impair the various functions required of the transparent resin layer. Examples of the additives include plasticizers, antifoaming agents, surfactants, antioxidants, dispersants, and tackifiers. These additives are preferably additives commonly used in cosmetics, and more preferably additives that are highly safe for the skin.

[0026] (adhesive layer) In the transfer nail tape of the present invention, an adhesive layer is provided as the outermost layer on a transparent resin layer that imparts gloss to the nail. In the transfer nail tape of the present invention, the transparent resin layer that imparts gloss and decoration to the nail and the adhesive layer that imparts adhesion to the nail are functionally separated. Therefore, the adhesive layer does not adhere strongly to the nail simply by contacting the nail. Therefore, if the transfer nail tape is applied in the wrong position, the position of the transfer nail tape on the nail can be corrected. Furthermore, by transferring the adhesive layer of the transfer nail tape of the present invention from the substrate surface opposite the adhesive layer while it is in contact with the nail using the transfer spatula of the present invention, which will be described later, the adhesive layer can adhere strongly to the nail.

[0027] While various adhesive resins can be used as materials for the adhesive layer, acrylic adhesives are preferred among various adhesive resins due to their easy adjustment of adhesive strength and their tendency to develop adhesiveness upon application of pressure. The adhesive strength of the adhesive layer is preferably 0.05 N / 25 mm width or more and 0.50 N / 25 mm width or less, and more preferably 0.07 N / 25 mm width or more and 0.20 N / 25 mm width or less. If the adhesive strength of the adhesive layer is less than 0.05 N / 25 mm, even when a transfer layer containing the adhesive layer is transferred to a nail using the transfer spatula of the present invention described below, the adhesive layer may not adhere sufficiently to the nail, resulting in lifting or peeling of the transfer layer. On the other hand, if the adhesive strength of the adhesive layer exceeds 0.50 N / 25 mm, the adhesive layer will adhere strongly to the nail simply by contacting it with the nail, making it impossible to correct the position of the transfer nail tape on the nail if it is applied in the wrong position.

[0028] (Adhesion strength measurement of adhesive layer) The adhesive strength of the adhesive layer can be measured using the following method. A 12-μm-thick PET substrate with an adhesive layer laminated on it is cut into an adhesive test sheet measuring 150 mm in length and 25 mm in width. The adhesive layer of the adhesive test piece is pressed against a 2-mm-thick stainless steel plate (SUS304 steel plate specified in JIS G4305, with a surface finish of BA (cold-rolled, bright heat-treated), and a surface roughness of 50±25 nm Ra specified in JIS B0601) using a 2 kg roller, which moves back and forth once. After pressing, the test piece is left at room temperature for approximately 24 hours. Next, using a tensile tester at room temperature and humidity, the adhesive test piece (transfer nail tape) is peeled from the stainless steel plate at a peel angle of 180° and a peel rate of 1200 mm / min in the longitudinal direction of the adhesive test piece, and the adhesive strength (N / 25 mm) of the adhesive layer of the transfer nail tape is measured.

[0029] The thickness of the adhesive layer (thickness after drying, hereinafter the same) is preferably 1.0 μm to 3.0 μm, more preferably 1.2 μm to 2.0 μm. If the thickness of the adhesive layer is less than 1.0 μm, the adhesive strength of the adhesive layer will be too weak, and the adhesive layer will not adhere sufficiently to the nail, which may cause the transfer layer to lift or peel after transfer. On the other hand, if the thickness of the adhesive layer exceeds 3.0 μm, the adhesive strength will be too strong, and the adhesive layer will adhere strongly to the nail simply by contacting it with the nail. If the transfer nail tape is applied in the wrong position, it will be impossible to correct the position on the nail.

[0030] As described above, the adhesive layer of the transfer nail tape of the present invention has two contradictory properties: it does not adhere strongly to the nail simply by contacting the nail, but allows the transfer nail tape to be repositioned on the nail if it is applied in the wrong position (hereinafter referred to as "position correcting property"); and it also has the property of allowing the adhesive layer to adhere strongly to the nail by transferring the adhesive layer from the substrate surface opposite the adhesive layer using the transfer spatula of the present invention described below while the adhesive layer is in contact with the nail (hereinafter referred to as "strong adhesive property"). In order to combine these contradictory properties of position correcting property and strong adhesive property, it is preferable that the adhesive layer of the present invention contains particles.

[0031] Various resin particles can be preferably used as particles contained in the adhesive layer. Resin particles are not particularly limited as long as they are particles formed from a resin, and examples include acrylic particles, urethane particles, silicone particles, nylon particles, styrene particles, melamine particles, urethane acrylic particles, polyester particles, and polyethylene particles. Among these resin particles, polyethylene particles or acrylic particles are preferably used. By incorporating particles into the adhesive layer, the particles protrude from the surface of the adhesive layer. Therefore, simply lightly contacting the adhesive layer with the nail reduces the contact area between the resin of the adhesive layer and the nail due to the particles coming into contact with the nail. Therefore, incorporating particles into the adhesive layer can improve position correction performance.

[0032] When the adhesive layer is in contact with the nail and transferred from the substrate surface opposite the adhesive layer using the transfer spatula of the present invention described below, the pressure of the transfer spatula crushes the polyethylene particles protruding from the adhesive layer surface in an adhesive layer containing polyethylene particles. The crushing of the polyethylene particles increases the contact area between the adhesive layer resin and the nail, allowing the adhesive layer to adhere strongly to the nail. On the other hand, when the adhesive layer contains acrylic particles, the pressure of the transfer spatula causes the acrylic particles protruding from the adhesive layer surface to sink into the adhesive layer resin. The sinking of the acrylic particles into the adhesive layer resin increases the contact area between the adhesive layer resin and the nail, allowing the adhesive layer to adhere strongly to the nail.

[0033] The particle content of the adhesive layer is preferably 0.8% by weight to 12.2% by weight, more preferably 2.8% by weight to 10.2% by weight, based on the solid content of the adhesive layer. The inclusion of particles improves positioning ability, but if the particle content is less than 0.8% by weight, the positioning ability is hardly improved. On the other hand, if the particle content exceeds 12.2% by weight, the adhesive layer will not adhere sufficiently to the nail, even when transferred using the transfer spatula of the present invention described below, and the transfer layer may lift or peel off.

[0034] The average particle size of the particles contained in the adhesive layer is preferably 0.2 μm or more and 3.6 μm or less, and more preferably 0.5 μm or more and 3.1 μm or less. If the average particle size of the particles is less than 0.2 μm, there is almost no improvement in position correction performance. On the other hand, if the average particle size of the particles is more than 3.6 μm, the adhesive performance is reduced, so even if the adhesive layer is transferred using the transfer spatula of the present invention described below, the adhesive layer may not adhere sufficiently to the nail, and the transfer layer may lift or peel after transfer.

[0035] (Method for measuring the average particle size of resin particles) The average particle size of the resin particles of the present invention is a number-average particle size that can be measured by the following method. The number-average particle size of the resin particles of the present invention can be measured by observing the cross section of the adhesive layer with a scanning electron microscope (SEM). The number-average particle size is determined by observing at a magnification where the number of particles as an aggregate is 10 to 50 per field of view, determining the diameter of the circumscribed circle of the particles from the obtained image, and using this as the particle size. The number of observations is increased to 100 particles, and the number-average particle size is determined from the value measured.

[0036] (Transfer spatula) The transfer nail tape of the present invention can be used with an elastomer transfer spatula to achieve both the above-mentioned position correction performance and strong adhesive performance. The term "elastomer" may refer to a material whose main component is elastomer, but it does not necessarily have to be a 100% elastomer material. Furthermore, the entire transfer spatula does not need to be made of elastomer; at least the tip of the transfer spatula, which presses the transfer nail tape to transfer the transfer layer of the transfer nail tape to the nail, needs to be made of elastomer. Using a transfer spatula with an elastomer tip ensures that the above-mentioned position correction performance and strong adhesive performance can be achieved at the same time.

[0037] The Vickers hardness of the elastomer used in the transfer spatula should preferably be between 43HV and 70HV. If the Vickers hardness of the elastomer is less than 43HV, the adhesive strength of the transfer layer of the transfer nail tape will decrease, the adhesive layer will not adhere sufficiently to the nail, and the transfer layer may peel or peel off after transfer. On the other hand, if the Vickers hardness of the elastomer exceeds 70HV, the transparent resin layer may be scratched or deformed during transfer, which may result in a poor appearance of the nail after transfer. The Vickers hardness (HV) of the elastomer is the average value of three measurements taken in accordance with JIS Z2244 using a microhardness tester (Mitutoyo Corporation HM221) with a load of 0.01N applied to a flat portion of the elastomer material for 15 seconds. As long as the Vickers hardness is within the above range, there are no particular restrictions on the elastomer material to be used, and various rubber materials such as polyurethane elastomers, olefin elastomers, styrene elastomers, polyamide elastomers, nylon 12 elastomers, polyester elastomers, and acrylic rubber, NBR, isoprene rubber, SBR, butadiene rubber, silicone rubber, and butyl rubber can be used.

[0038] The area of ​​the tip of the transfer spatula that presses the transfer nail tape is 2mm 2 (For example, 1mm length x 2mm width) or more than 6mm 2 (For example, 2 mm length × 3 mm width) or less. 2 If the area is less than 2 mm, the pressing force per unit area will be too large, which may damage the transparent resin layer. 2 If the area is less than 6mm, the tip of the transfer spatula will be easily damaged. 2 If the pressure applied to the transfer nail tape exceeds this value, the pressure applied per unit area to the transfer nail tape will be small, causing the adhesive layer of the transfer nail tape to not adhere sufficiently, which may result in lifting or peeling of the transfer layer after transfer.

[0039] The shape of the pressing surface at the tip of the transfer spatula is preferably rectangular or square. By making the shape of the pressing surface rectangular or square, it is possible to apply a uniform pressure to the transfer nail tape surface pressed by the transfer spatula by moving the transfer spatula over the nail along one side of the rectangle or square. When the shape of the pressing surface at the tip of the transfer spatula is rectangular, it is preferable that the length of the longer side is 3 mm or less. The surface of the nail is curved, and if the longer side of the rectangle exceeds 3 mm, the tip of the transfer spatula cannot follow the curved surface of the nail surface, making it impossible for the transfer spatula to apply uniform pressure to the transfer nail tape, which makes it more likely that poor transfer of the transfer layer will occur.

[0040] (Example) The present invention will be explained in more detail using the following examples and comparative examples. However, the present invention is not limited to these examples. Hereinafter, when the amount of each material is expressed as "parts," it means "parts by weight" unless otherwise specified.

[0041] (Transfer nail tape) (Production Example 1) (Transparent resin layer) The transparent resin layer coating liquid prepared by kneading the materials in the following formula was applied to a 25 μm thick PET film, dried, and then exposed to an integrated light intensity of 500 mj / cm. 2 The coating was cured by irradiating it with ultraviolet light of 1000 kJ / cm to form a transparent resin layer having a thickness of 10 μm. (Transparent resin layer coating liquid) Urethane acrylate (containing 50% by weight of acrylate oligomer) (Negami Industrial Co., Ltd. Art Resin UN-907) 29.0 parts Alkylphenone photopolymerization initiator (IGM Resins omnirad184) 1.0 parts Methyl ethyl ketone 80.0 parts

[0042] The adhesive layer coating liquid described below was applied onto the transparent resin layer of the transfer nail tape of Preparation Example 1, and heated and dried at 100°C for 2 minutes to form an adhesive layer with a thickness of 1.6 μm after drying. (Adhesive layer coating liquid) Acrylic copolymer 100.0 parts (Hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approx. 500,000, solid content 37%) Hexamethylene diisocyanate 0.5 parts (solids 37.5%) Total 100.5 copies

[0043] The adhesive layer of the transfer nail tape of Preparation Example 1 and the release agent-coated surface of a 25 μm thick cover film (made of polyethylene terephthalate) coated with a silicone-based release agent were placed facing each other and sandwiched between two rolls (a rubber roll and a metal roll), and the two were bonded together while allowing air to escape, thereby obtaining the transfer nail tape of Preparation Example 1 of the present invention.

[0044] (Preparation Example 2, containing 3% polyethylene particles with a particle size of 0.6 μm) A transfer nail tape of Preparation Example 2 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 0.6 μm, solid content 100%) 1.15 parts Total 101.65 copies

[0045] (Preparation Example 3, containing 10% polyethylene particles with a particle size of 0.6 μm) A transfer nail tape of Preparation Example 3 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 0.6 μm, solid content 100%) 4.13 parts Total 104.63 copies

[0046] (Preparation Example 4, containing 3% polyethylene particles with a particle diameter of 3.0 μm) A transfer nail tape of Preparation Example 4 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 3.0 μm, solid content 100%) 1.15 parts Total 101.65 copies

[0047] (Preparation Example 5, containing 10% polyethylene particles with a particle diameter of 3.0 μm) A transfer nail tape of Preparation Example 5 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 3.0 μm, solid content 100%) 4.13 parts Total 104.63 copies

[0048] (Preparation Example 6, containing 1% polyethylene particles with a particle size of 0.6 μm) A transfer nail tape of Preparation Example 6 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 0.6 μm, solid content 100%) 0.38 parts Total 100.88 copies

[0049] (Preparation Example 7, containing 12% polyethylene particles with a particle diameter of 3.0 μm) A transfer nail tape of Production Example 7 was obtained in the same manner as the transfer nail tape of Production Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 3.0 μm, solid content 100%) 5.07 parts Total 105.57 copies

[0050] (Preparation Example 8, containing 3% polyethylene particles with a particle size of 0.3 μm) The transfer nail tape of Production Example 8 was obtained in the same manner as the transfer nail tape of Production Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 0.3 μm, solid content 100%) 1.15 parts Total 101.65 copies

[0051] (Preparation Example 9, containing 10% polyethylene particles with a particle diameter of 3.5 μm) The transfer nail tape of Production Example 9 was obtained in the same manner as the transfer nail tape of Production Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 3.5 μm, solid content 100%) 4.13 parts Total 104.63 copies

[0052] (Production Example 10) A transfer nail tape of Preparation Example 10 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Ethylene vinyl acetate copolymer (MFR150, VA%28%) 20.00 parts Toluene 80.00 parts

[0053] (Preparation Example 11, particle size 0.6 μm polyethylene particles 3% content, adhesive layer thickness 0.8 μm) The transfer nail tape of Preparation Example 11 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation and the thickness of the adhesive layer after drying was changed to 0.8 μm. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Polyethylene particles (average particle size 0.6 μm, solid content 100%) 1.15 parts Total 101.65 copies

[0054] (Preparation Example 12, particle size 0.6 μm polyethylene particles 3% content, adhesive layer thickness 3.2 μm) A transfer nail tape of Preparation Example 12 was obtained in the same manner as the transfer nail tape of Preparation Example 11, except that the thickness of the adhesive layer after drying was changed to 3.2 μm.

[0055] (Example 13, particle size 0.6 μm acrylic particles 3% content, adhesive layer thickness 1.6 μm) A transfer nail tape of Preparation Example 13 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Acrylic particles (average particle size 0.6 μm, solid content 100%) 1.15 parts Total 101.65 copies

[0056] (Example 14, particle size 0.6 μm acrylic particles 10% content, adhesive layer thickness 1.6 μm) A transfer nail tape of Preparation Example 14 was obtained in the same manner as the transfer nail tape of Preparation Example 1, except that the adhesive layer coating liquid was changed to the following formulation. (Adhesive layer coating liquid) Acrylic copolymer (hydroxybutyl acrylate, butyl acrylate copolymer, weight average molecular weight Mw: approximately 500,000, solid content 37%) 100.00 parts Hexamethylene diisocyanate (solid content 37.5%) 0.50 parts Acrylic particles (average particle size 0.6 μm, solid content 100%) 4.13 parts Total 104.63 copies

[0057] (Transfer spatula) (Transfer spatula production example 1) A transfer spatula of transfer spatula production example 1 was prepared, with the shape shown in Figure 2, and the tip of the transfer spatula made of polyurethane elastomer with a Vickers hardness of 47 HV. The pressing surface of the transfer nail tape was a rectangle of 1 mm x 3 mm, and the tip of the transfer spatula was designed to be detachable from the hole in the transfer spatula body shown in Figure 2, and the tip of the transfer spatula was attached to the transfer spatula in a state where it protruded 5 mm from the transfer spatula body.

[0058] (Transfer spatula production example 2) A transfer spatula of transfer spatula production example 2 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to a polyurethane elastomer having a Vickers hardness of 45 HV.

[0059] (Transfer spatula production example 3) A transfer spatula of transfer spatula production example 3 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to a polyurethane elastomer having a Vickers hardness of 50 HV.

[0060] (Transfer spatula production example 4) A transfer spatula of transfer spatula production example 4 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to brass with a Vickers hardness of 110 HV.

[0061] (Transfer spatula production example 5) A transfer spatula of transfer spatula production example 5 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to a plastic eraser with a Vickers hardness of 40 HV.

[0062] (Transfer spatula production example 6) A transfer spatula of transfer spatula production example 6 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to a polyurethane elastomer having a Vickers hardness of 68 HV.

[0063] (Transfer spatula production example 7) A transfer spatula of transfer spatula production example 7 was prepared in the same manner as the transfer spatula of transfer spatula production example 1, except that the material of the tip of the transfer spatula was changed to a polyurethane elastomer having a Vickers hardness of 72 HV.

[0064] The above transfer nail tape production examples and transfer spatula production examples were combined as shown in Table 1 to create examples and comparative examples of combinations of transfer nail tape and transfer spatula, and the following alignment evaluation and transfer evaluation were performed for each.

[0065] (Table 1) TIFF0007827562000001.tif58165

[0066] (Evaluation method) (Adhesion strength measurement of adhesive layer) The adhesive strength of the adhesive layer of each transfer nail tape was measured using the following measurement method. The measurement results are shown in Table 2. An adhesive layer coating solution was prepared for use in producing each transfer nail tape. The adhesive layer coating solution used to laminate the adhesive layer of each transfer nail tape was used on the surface of a 12 μm-thick PET substrate. The adhesive layer was laminated under the same coating conditions and to the same layer thickness as each example, to prepare an adhesive strength measurement sheet for each example (transfer nail tapes of Examples 1 to 14). Next, the adhesive strength measurement sheet for each transfer nail tape was cut to prepare a 150 mm long, 25 mm wide adhesive strength measurement strip for each transfer nail tape. The adhesive layer of the adhesive strength test piece was pressed against a 2mm thick stainless steel plate (SUS304 steel plate specified in JIS G4305, with a surface finish of BA (cold rolled and then bright heat treated), and a surface roughness of 50±25nm Ra specified in JIS B0601) using a 2kg roller, which was then rolled back and forth once. After pressing, the test piece was left at room temperature for approximately 24 hours. Next, using a tensile tester at room temperature and humidity, the adhesive strength (N / 25mm) of the adhesive layer of the transfer nail tape for each example was measured, with the test piece being peeled off from the stainless steel plate at a peel angle of 180° and a peel speed of 1200mm / min in the longitudinal direction of the test piece.

[0067] (Table 2) TIFF0007827562000002.tif60165

[0068] (Alignment evaluation) The transfer nail tape of each example and comparative example was cut to a width of 10 mm, and the separator was peeled off. As shown in Figure 3, with the adhesive layer lightly in contact with the nail, the transfer nail tape was pulled with a spring balance (maximum measurement of 5 N) so that it moved along the surface of the nail in the longitudinal direction of the nail, and whether or not the transfer nail tape could move was confirmed. The nails used for evaluation were the commercially available artificial nails listed below. The measurement results were evaluated according to the following criteria. The evaluation results are shown in Table 3. False nails used for evaluation, manufacturer: YFFSFDC Material: ABS (acrylonitrile butadiene styrene) Size: 25mm x 15mm x 5mm Evaluation criteria: ⊚: The value indicated by the spring balance was less than 1 N, and the transfer nail tape moved relative to the nail. ○: The value indicated by the spring balance is between 1N and 2N, and the transfer nail tape is not transferred to the nail. It moved. ×: The transfer nail tape does not move against the nail even when the value indicated by the spring balance reaches 2N. It was.

[0069] (Transferability evaluation) The separator of each transfer nail tape of each Example and Comparative Example was peeled off, and with the adhesive layer lightly in contact with the false nail, the transfer spatula of each Example and Comparative Example was pressed against the false nail with a force of 1.5 N. The transfer layer (adhesive layer and transparent resin layer) of the transfer nail tape was transferred to the false nail by moving it 5 mm in the direction perpendicular to the 3 mm edge of the pressing surface of the tip of the transfer spatula. After transfer, the transfer nail tape was peeled off from the false nail, and the state of attachment of the transfer layer to the false nail was visually confirmed. If the 3 mm x 5 mm transfer layer was transferred without any chipping, the evaluation was completed. If the transfer was insufficient, such as there being chips in the 3 mm x 5 mm transfer layer after the first transfer, a new transfer nail tape and false nail were used to perform one more transfer, and the transfer state was then confirmed twice at the same location on the same transfer nail tape. If the transfer is still insufficient after two transfers, a new transfer nail tape and artificial nails are used to transfer the image a third time, increasing the number of transfers until the entire 3mm x 5mm transfer layer is transferred without any missing parts. The measurement results were evaluated according to the following criteria. The evaluation results are shown in Table 3. The same artificial nails as those used in the above alignment evaluation were used. Evaluation criteria ⊚: A 3 mm x 5 mm transfer layer can be transferred without chipping in 5 tries or less. ○: A 3 mm × 5 mm transfer layer can be transferred without chipping in 6 to 10 times. △: A 3mm x 5mm transfer layer can be transferred without any chipping after 11 to 15 tries. ×: The 3 mm×5 mm transfer layer cannot be transferred without any defects even after 15 transfers.

[0070] (Table 3) TIFF0007827562000003.tif58165 [Explanation of symbols]

[0071] 10...Base material (transfer nail tape) 11...Transparent resin layer (transfer nail tape) 12...Adhesive layer (transfer nail tape) A... Transfer nail tape B...Transfer spatula

Claims

1. A transfer nail tape comprising a substrate on which at least a transparent resin layer and an adhesive layer are laminated in this order from the substrate side, wherein the adhesive strength of the adhesive layer is 0.05 N / 25 mm width or more and 0.5 N / 25 mm width or less, and the thickness of the transparent resin layer is 5 μm or more and 20 μm or less, and the adhesive layer is in a state where the adhesive layer is in contact with a nail, and the transfer nail tape on the side opposite the adhesive layer is pressed with a transfer spatula containing elastomer as a main component and having a Vickers hardness of 43 HV or more and 70 HV or less, the transparent resin layer and the adhesive layer can be separated from the surrounding transfer nail tape that is not transferred to the nail, and transferred to the nail.

2. 2. The combination of transfer nail tape and transfer spatula according to claim 1, wherein the adhesive layer contains resin particles in an amount of 2.8% by weight or more and 10.2% by weight or less of the solid content of the adhesive layer.

3. 3. The combination of transfer nail tape and transfer spatula according to claim 2, wherein the particle diameter of the resin particles is 0.5 μm or more and 3.1 μm or less.

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