KR102543665B1 - Manufacturing method of gel nail - Google Patents

Abstract

The present invention relates to a method for manufacturing a gel nail, wherein a cured finishing layer is formed by applying a finishing layer coating solution containing a solvent, a slip agent, an ultraviolet curing resin and an ultraviolet curing initiator on a polyethylene terephthalate release layer, or the polyethylene terephthalate Forming a transparent printing layer printed with transparent ink containing a solvent and a thermosetting resin on the release layer, including a solvent, a thermosetting resin, a blue light curing resin and a blue light curing initiator on the cured finishing layer or the transparent printing layer Forming a semi-hardened gel layer by applying a gel coating solution to form an upper layer, including drying; Forming an adhesive layer by applying an adhesive on the polyethylene terephthalate release layer, forming a base layer by laminating a urethane film on the adhesive layer, Forming a decorative layer for decorating nails on the base layer, and forming an adhesive layer on the decorative layer by applying a solvent and a thermosetting resin or an adhesive layer coating solution containing a solvent, a blue light curing resin and a blue light curing initiator; and a bonding step of compressing the upper and lower layers so that the semi-hardened gel layer of the upper layer and the adhesive layer of the lower layer come into contact with each other.

Description

Manufacturing method of gel nail {MANUFACTURING METHOD OF GEL NAIL}

The present invention relates to a method for manufacturing gel nails, and more particularly, to a method for manufacturing adhesive gel nails.

As interest in nail art increases, nail compositions with good adhesion and durability are required. Recently, gel nails, which are hardened by ultraviolet rays or heat and have excellent gloss and last for a long time, are widely used, and various types of nail compositions such as hard gels, soft gels, and soak off gels are available. is being presented

However, since the gel nail treatment of applying a conventional liquid pigment composition requires a professional treatment, a gel nail in the form of a sticker has been released and gained much popularity so that users can easily use it by themselves.

Korean Patent Registration No. 10-2207817 suggests a gel nail sticker that can reversibly change color, pattern, or transmittance even after being attached to the fingernail or toenail.

However, gel nail stickers have poor adhesion compared to liquid gel nail procedures, have poor durability, have a flat film shape, are not natural, lack aesthetic effects, and are harmful to the user's nails and skin because they have to be cured for a long time with ultraviolet rays.

Korean Registered Patent No. 10-2207817 (registered on 2021.01.20)

The gel nail manufacturing method of the present invention was devised to solve the above problems, and cured by applying a finishing layer coating solution containing a solvent, slip agent, UV curing resin and UV curing initiator on a polyethylene terephthalate release layer. Forming a finishing layer or forming a transparent printing layer printed with a transparent ink containing a solvent and a thermosetting resin on the polyethylene terephthalate release layer, a solvent, a thermosetting resin, Forming a semi-cured gel layer by applying a gel coating solution containing a blue light curing resin and a blue light curing initiator, and drying the upper layer forming step; Forming an adhesive layer by applying an adhesive on the polyethylene terephthalate release layer, forming a base layer by laminating a urethane film on the adhesive layer, Forming a decorative layer for decorating nails on the base layer, and forming an adhesive layer on the decorative layer by applying a solvent and a thermosetting resin or an adhesive layer coating solution containing a solvent, a blue light curing resin and a blue light curing initiator; and a bonding step of compressing the upper and lower layers so that the semi-hardened gel layer of the upper layer and the adhesive layer of the lower layer come into contact with each other.

The present invention may also have as its object to achieve other objects that can be easily derived by a person of ordinary skill in the art from these objects and the overall description of this specification in addition to the above clear objects.

The gel nail manufacturing method of the present invention, in order to achieve the above object,

Forming a cured finishing layer by applying a finishing layer coating solution containing a solvent, a slip agent, an ultraviolet curing resin and an ultraviolet curing initiator on a polyethylene terephthalate release layer, or containing a solvent and a thermosetting resin on the polyethylene terephthalate release layer Forming a transparent printing layer printed with transparent ink, applying a gel coating solution containing a solvent, a thermosetting resin, a blue light curing resin and a blue light curing initiator on the cured finishing layer or the transparent printing layer to form a semi-cured gel layer Step, and comprising the step of drying, the upper layer forming step; Forming an adhesive layer by applying an adhesive on the polyethylene terephthalate release layer, forming a base layer by laminating a urethane film on the adhesive layer, Forming a decorative layer for decorating nails on the base layer, and forming an adhesive layer on the decorative layer by applying a solvent and a thermosetting resin or an adhesive layer coating solution containing a solvent, a blue light curing resin and a blue light curing initiator; and a bonding step of compressing the upper and lower layers so that the semi-hardened gel layer of the upper layer and the adhesive layer of the lower layer come into contact with each other.

In addition, a drying step may be further included after the bonding step.

In addition, the upper layer portion and the lower layer portion may be compressed while the adhesive layer is uncured.

In addition, in the lower layer forming step, after forming the decorative layer and before forming the adhesive layer, a shaped layer coating solution containing a solvent, an ultraviolet curing resin and an ultraviolet curing initiator is applied on the decorative layer, and the shaped layer is formed to have a convex shape. It may further include steps to do.

In addition, the solvent is hydroxyethyl methacrylate (HEMA; Hema), butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, methyl isobutyl ketone (MIBK; incomplete) K), cyclohexanone, ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethylpyrrolidone, and mixtures thereof.

In addition, the thermosetting resin is a styrene / methacrylamide / acrylate copolymer, acrylate / ethylhexyl acrylate / styrene copolymer, acrylate / diethylaminoethyl methacrylate / ethylhexyl acrylate copolymer, It may be selected from the group consisting of sodium DB/acrylate copolymer, acrylate/perfluorohexylethyl methacrylate copolymer, nitrocellulose, cellulose acetate butyrate, acrylate copolymer, and mixtures thereof.

In addition, the UV curing resin may be selected from the group consisting of di-hema trimethylhexyl dicarbamate, acrylate/ethylhexyl acrylate/HEMA copolymer, and mixtures thereof.

And, the UV curing initiator may be selected from the group consisting of hydroxycyclohexylphenyl ketone, trimethylbenzoyldiphenylphosphine oxide, and mixtures thereof.

And, the blue light curing resin is triethylene glycol methyl ether methacrylate (triethylene glycol methyl ether methacrylate), urethane dimethacrylate (urethane dimethacrylate), bisphenol S-glycidyl methacrylate, a compound of Formula 1, and It may be selected from the group consisting of mixtures thereof:

[Formula 1]

(Wherein, A is a hydroxyl group or a methacrylic group).

In addition, the blue light curing resin may be a mixture of a compound represented by Formula 1 in which both A's are hydroxyl groups and a compound in which one A is a hydroxyl group and the other A is a methacrylic group.

In addition, when the blue light curing resin is a mixture of a compound of Formula 1 in which both A's are hydroxyl groups and one A is a hydroxyl group and the other A is a methacrylic group, the mixing ratio is 10 to 90% by weight : 90 to 10 wt%, 20 to 80 wt%: 80 to 20 wt%, or 30 to 70 wt%: 70 to 30 wt%.

And, the blue light curing initiator is from the group consisting of camphorquinone, ethyl p-dimethylamino benzoate, phenylpropanedione, lucirin, and mixtures thereof can be chosen

And, the addition amount of the blue light curing initiator may be 1 to 10 parts by weight, 2 to 9 parts by weight, or 3 to 8 parts by weight per 100 parts by weight of the blue light curing resin.

In addition, the gel coating solution may further include a filler selected from the group consisting of silica, zirconia, and mixtures thereof.

And, the filler may be included by 1 to 30 parts by weight, 2 to 20 parts by weight, or 3 to 10 parts by weight per 100 parts by weight of the blue light curing resin.

And, the gel coating solution may further include a diluent selected from the group consisting of triethylene glycol dimethacrylate, dimethylglyoxime, and mixtures thereof.

And, the diluent may be included by 1 to 10 parts by weight, 2 to 9 parts by weight, or 3 to 8 parts by weight per 100 parts by weight of the blue light curing resin.

And, the gel coating solution may further include an activator selected from the group consisting of diethylaminoethyl methacrylate, diketone, and mixtures thereof.

And, the activator may be included by 0.5 to 5 parts by weight, 0.7 to 4 parts by weight, or 1 to 3 parts by weight per 100 parts by weight of the blue light curing resin.

In addition, the shape layer may have a thickness of 0.6 mm or less, 0.55 mm or less, or 0.5 mm or less.

In addition, the decorative layer may include one selected from the group consisting of dyes, pigments, glitters, metal foils, hologram foils, and combinations thereof.

In addition, the semi-hardened gel layer may be cured within 60 seconds, 40 seconds, or 30 seconds.

In addition, the thickness of the semi-hardened gel layer may be 0.12 to 0.38 mm, 0.16 to 0.34 mm, or 0.2 to 0.3 mm.

In addition, the cured finish layer or the transparent printing layer may have a thickness of 0.05 to 0.25 mm, 0.08 to 0.22 mm, or 0.1 to 0.2 mm.

And, the slip agent may be a silicone-based slip agent or a non-silicone-based slip agent.

And, the pressure-sensitive adhesive may be an acrylic pressure-sensitive adhesive.

According to the gel nail manufacturing method of the present invention, a gel nail sticker can be easily manufactured and a gel nail in which a semi-hardened layer and a hardened layer are combined can be manufactured. In addition, by using a blue light curing resin instead of a conventional UV curing resin in the semi-curing gel layer, it can be quickly cured with blue light instead of harmful ultraviolet rays, thereby preventing damage to nails and skin. Furthermore, by introducing a filler into the semi-cured gel layer, the strength and abrasion resistance of the gel nail may be improved, shrinkage may be suppressed during curing of the semi-cured gel layer, and generation of reaction heat may be reduced. In addition, a diluent may be introduced into the semi-cured gel layer to impart and adjust necessary fluidity to the semi-cured gel layer before curing, and an activator may be introduced to assist the blue light curing initiator to promote photocuring. In addition, when a convex shape layer is introduced, the gel nail has a convex shape as a whole, which not only gives a three-dimensional effect, but also improves a feminine aesthetic and glossiness, thereby exhibiting an excellent appearance.

1 schematically shows a method for manufacturing a gel nail according to an embodiment of the present invention.
2 shows a cross-section of a shaped layer according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail.

However, the following is only a detailed description by exemplifying specific embodiments, and since the present invention may be variously changed and may have various forms, the present invention is not limited to the specific embodiments illustrated. It should be understood that the present invention includes all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

In addition, in the following description, many specific details such as specific components are described, which are provided to help a more general understanding of the present invention, and it is common in the art that the present invention can be practiced without these specific details. It will be self-evident to those who have the knowledge of And, in describing the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

And, the terms used in this application are only used to describe specific embodiments, and are not intended to limit the present invention. Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and unless explicitly defined in the present application, they should not be interpreted in an ideal or excessively formal meaning. don't

In this application, expressions in the singular number include plural expressions unless the context clearly dictates otherwise.

In this application, terms such as 'comprise', 'include' or 'having' are intended to indicate that the features, components (or components), etc. described in the specification exist, but one or more other features or It does not mean that components or the like do not exist or cannot be added.

In this application, 'blue light' refers to light of 450 to 485 nm or 460 to 480 nm corresponding to the blue region of visible light.

In the gel nail manufacturing method of the present invention, a finishing layer coating solution containing a solvent, a slip agent, an ultraviolet curing resin, and an ultraviolet curing initiator is applied on the polyethylene terephthalate release layer 900 to form a cured finishing layer 800 or Forming a transparent printing layer 800 printed with a transparent ink containing a solvent and a thermosetting resin on the polyethylene terephthalate release layer 900, a solvent on the cured finish layer or the transparent printing layer 800, Forming a semi-cured gel layer 700 by applying a gel coating solution containing a thermosetting resin, a blue light curing resin and a blue light curing initiator, and drying the upper layer forming step;

Forming the adhesive layer 200 by applying an adhesive on the polyethylene terephthalate release layer 100, forming the substrate layer 300 by laminating a urethane film on the adhesive layer 200, the substrate layer Forming a decorative layer 400 for decorating nails on 300, and applying an adhesive layer coating solution containing a solvent and a thermosetting resin, or a solvent, a blue light curing resin and a blue light curing initiator on the decorative layer 400 To form a lower layer portion comprising the step of forming an adhesive layer 600; and

and a bonding step of compressing the upper and lower layers so that the semi-hardened gel layer 700 of the upper layer and the adhesive layer 600 of the lower layer come into contact with each other.

1 schematically shows a gel nail manufacturing method according to the present invention, and shows a gel nail manufacturing method consisting of an upper layer forming step, a lower layer forming step, and a bonding step. An upper layer composed of a semi-hardened gel layer 700, a transparent printing layer or cured finishing layer 800, and a polyethylene terephthalate release layer 900, a polyethylene terephthalate release layer 100, an adhesive layer 200, and a base layer ( 300), the decorative layer 400, and the adhesive layer 600 are manufactured, and the upper and lower layers are bonded to form a gel nail. Hereinafter, each step is described in detail.

Upper layer formation stage

First, a polyethylene terephthalate (PET) release layer 900 is prepared. The polyethylene terephthalate release layer 900 forms the uppermost layer of the gel nail of the present invention and can be removed during use.

Next, a cured finish layer or a transparent printed layer 800 is formed on the polyethylene terephthalate release layer 900 . The cured finishing layer or the transparent printing layer 800 serves to smooth the surface and prevent foreign matter from adhering to it.

When the cured finishing layer 800 is formed on the polyethylene terephthalate release layer 900, a finishing layer coating liquid containing a solvent, a slip agent, a UV curing resin and an UV curing initiator is applied on the polyethylene terephthalate release layer 900. The cured finishing layer 800 may be formed by coating. UV curing may be performed after application of the coating solution for the finishing layer. The curing finish layer 800 may be UV-cured within 60 seconds, 40 seconds, or 30 seconds.

The solvent is hydroxyethyl methacrylate (HEMA), butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, methyl isobutyl ketone (MIBK), cyclohexanone, It may be selected from the group consisting of ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethylpyrrolidone, and mixtures thereof.

The slip agent may be a silicone-based slip agent or a non-silicone-based slip agent.

The UV-curable resin may be cured by UV light and may be selected from the group consisting of di-hema trimethylhexyl dicarbamate, acrylate/ethylhexyl acrylate/HEMA copolymer, and mixtures thereof.

The UV curing initiator may be selected from the group consisting of hydroxycyclohexylphenyl ketone, trimethylbenzoyldiphenylphosphine oxide, and mixtures thereof.

When the transparent printing layer 800 is formed on the polyethylene terephthalate release layer 900, the transparent printing layer 800 is formed by printing with a transparent ink containing a solvent and a thermosetting resin on the polyethylene terephthalate release layer 900. can form This transparent printing layer 800 makes the surface smooth and prevents foreign substances from being smeared. Room temperature curing or thermal curing may be performed after transparent ink printing, but thermal curing is advantageous in that the curing time can be shortened.

The solvent is HEMA, butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, MIBK, cyclohexanone, ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethyl pyrrolidone, and mixtures thereof.

The thermosetting resin may be cured by heat, such as styrene/methacrylamide/acrylate copolymer, acrylate/ethylhexyl acrylate/styrene copolymer, acrylate/diethylaminoethyl methacrylate/ethylhexyl acrylate copolymers, sodium DB/acrylate copolymers, acrylates/perfluorohexylethyl methacrylate copolymers, nitrocellulose, cellulose acetate butyrate, acrylate copolymers, and mixtures thereof. can

Also, the thickness of the transparent printing layer 800 may be 0.05 to 0.25 mm, 0.08 to 0.22 mm, or 0.1 to 0.2 mm. When the thickness of the transparent printing layer 800 is within the above range, the surface is smooth and the adhesion of foreign substances is prevented, so that the gloss of the gel nail of the present invention can be maintained for a long time.

Next, a gel coating solution containing a solvent, a thermosetting resin, a blue light curing resin, and a blue light curing initiator is applied on the cured finishing layer or the transparent printing layer 800 to form a semi-cured gel layer 700 . After applying the gel coating solution, drying at room temperature or heat may be performed to form a semi-cured gel layer 700 in a dry state. The main feature of the gel nail manufacturing method of the present invention is that a blue light curable resin is used instead of a conventional UV curable resin for the semi-cured gel layer 700 . Through this, the semi-curing gel layer 700 can be rapidly cured with blue light instead of harmful ultraviolet rays, thereby preventing damage to nails and skin.

Another feature of the semi-curing gel layer 700 is that it includes both a thermosetting resin and a blue light curing resin, through which the curing time can be adjusted according to the use or situation. The ratio of the thermosetting resin and the blue light curing resin may be 1:99 to 99:1, and it is preferable that the blue light curing resin is more than the thermosetting resin. The semi-cured gel layer 700 may be cured within 60 seconds, within 40 seconds, or within 30 seconds with heat, blue light, or a combination thereof.

The solvent is HEMA, butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, MIBK, cyclohexanone, ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethyl pyrrolidone, and mixtures thereof.

The thermosetting resin may be cured by heat, such as styrene/methacrylamide/acrylate copolymer, acrylate/ethylhexyl acrylate/styrene copolymer, acrylate/diethylaminoethyl methacrylate/ethylhexyl acrylate copolymers, sodium DB/acrylate copolymers, acrylates/perfluorohexylethyl methacrylate copolymers, nitrocellulose, cellulose acetate butyrate, acrylate copolymers, and mixtures thereof. can

The blue light curing resin is triethylene glycol methyl ether methacrylate, urethane dimethacrylate, bisphenol S-glycidyl methacrylate, a compound represented by Formula 1, and these It may be selected from the group consisting of mixtures:

[Formula 1]

(Wherein, A is a hydroxyl group or a methacrylic group).

In addition, the blue light curing resin may be a mixture of a compound represented by Formula 1 in which both A's are hydroxyl groups and a compound in which one A is a hydroxyl group and the other A is a methacrylic group.

In the case where the blue light curing resin is a mixture of a compound of Formula 1 in which both A's are hydroxyl groups and a compound in which one A is a hydroxyl group and the other A is a methacrylic group, the mixing ratio is 10 to 90% by weight: 90 to 10 wt%, 20 to 80 wt%: 80 to 20 wt%, or 30 to 70 wt%: 70 to 30 wt%.

And, the blue light curing initiator is from the group consisting of camphorquinone, ethyl p-dimethylamino benzoate, phenylpropanedione, lucirin, and mixtures thereof can be chosen

And, the addition amount of the blue light curing initiator may be 1 to 10 parts by weight, 2 to 9 parts by weight, or 3 to 8 parts by weight per 100 parts by weight of the blue light curing resin.

In addition, the gel coating solution may further include a filler selected from the group consisting of silica, zirconia, and mixtures thereof. These fillers can improve the strength and abrasion resistance of gel nails, suppress shrinkage during curing of the semi-cured gel layer 700, and reduce generation of reaction heat.

The filler may be included in an amount of 1 to 30 parts by weight, 2 to 20 parts by weight, or 3 to 10 parts by weight per 100 parts by weight of the blue light curing resin.

And, the gel coating solution may further include a diluent selected from the group consisting of triethylene glycol dimethacrylate, dimethylglyoxime, and mixtures thereof. Through this, fluidity required for the semi-cured gel layer 700 before curing may be imparted and adjusted.

And, the diluent may be included by 1 to 10 parts by weight, 2 to 9 parts by weight, or 3 to 8 parts by weight per 100 parts by weight of the blue light curing resin.

And, the gel coating solution may further include an activator selected from the group consisting of diethylaminoethyl methacrylate, diketone, and mixtures thereof. The activator assists the blue light curing initiator to promote photocuring.

And, the activator may be included by 0.5 to 5 parts by weight, 0.7 to 4 parts by weight, or 1 to 3 parts by weight per 100 parts by weight of the blue light curing resin.

In addition, the thickness of the semi-hardened gel layer 700 may be 0.12 to 0.38 mm, 0.16 to 0.34 mm, or 0.2 to 0.3 mm. When the thickness of the semi-hardened gel layer 700 is within the above range, flexibility and elasticity are expressed to improve wearing comfort and adhesion, and to naturally settle on the nail to improve aesthetics.

Lower layer formation stage

First, a polyethylene terephthalate (PET) release layer 100 is prepared. The polyethylene terephthalate release layer 100 may be a base layer of the gel nail of the present invention. The polyethylene terephthalate (PET) release layer 100 is a film that protects the adhesive layer 200 and can be removed when gel nails are used.

Next, an adhesive layer 200 is formed by applying an adhesive on the polyethylene terephthalate release layer 100 . The pressure-sensitive adhesive may be an acrylic pressure-sensitive adhesive, but is not limited thereto. Gel nails can be attached to fingernails or toenails through the adhesive.

Next, a base layer 300 is formed by laminating a urethane film on the adhesive layer 200 . The substrate layer 300 formed on the adhesive layer 200 is a layer that serves as a substrate for the decoration layer 400 to go up. The total thickness of the polyethylene terephthalate release layer 100, the adhesive layer 200, and the substrate layer 300 may be 0.18 to 0.3 mm, 0.2 to 0.25 mm, or 0.22 to 0.23 mm.

Next, a decoration layer 400 for decorating nails is formed on the base layer 300 . The decoration layer 400 formed on the base layer 300 is a layer for decorating the nail, and can decorate the nail using a material selected from the group consisting of dyes, pigments, glitters, metal foils, hologram foils, and combinations thereof. Furthermore, after forming a layer of dye or pigment on the base layer 300, a layer of glitter, metal foil, or hologram foil may be formed thereon. After decorating the decorative layer 400 by these, it can be hardened and fixed.

Next, an adhesive layer 600 is formed on the decoration layer 400 . The adhesive layer 600 is for bonding the lower layer to the upper layer, and may be formed by applying (i) a solvent and a thermosetting resin, or (ii) an adhesive layer coating solution containing a solvent, a blue light curing resin and a blue light curing initiator. After applying the adhesive layer coating solution, it remains sticky until bonding with the upper layer.

The solvent is HEMA, butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, MIBK, cyclohexanone, ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethyl pyrrolidone, and mixtures thereof.

The thermosetting resin may be cured by heat, such as styrene/methacrylamide/acrylate copolymer, acrylate/ethylhexyl acrylate/styrene copolymer, acrylate/diethylaminoethyl methacrylate/ethylhexyl acrylate copolymers, sodium DB/acrylate copolymers, acrylates/perfluorohexylethyl methacrylate copolymers, nitrocellulose, cellulose acetate butyrate, acrylate copolymers, and mixtures thereof. can

The blue light curing resin is triethylene glycol methyl ether methacrylate, urethane dimethacrylate, bisphenol S-glycidyl methacrylate, a compound represented by Formula 1, and these It may be selected from the group consisting of mixtures:

[Formula 1]

(Wherein, A is a hydroxyl group or a methacrylic group).

In addition, the blue light curing resin may be a mixture of a compound represented by Formula 1 in which both A's are hydroxyl groups and a compound in which one A is a hydroxyl group and the other A is a methacrylic group.

In the case where the blue light curing resin is a mixture of a compound of Formula 1 in which both A's are hydroxyl groups and a compound in which one A is a hydroxyl group and the other A is a methacrylic group, the mixing ratio is 10 to 90% by weight: 90 to 10 wt%, 20 to 80 wt%: 80 to 20 wt%, or 30 to 70 wt%: 70 to 30 wt%.

And, the blue light curing initiator is from the group consisting of camphorquinone, ethyl p-dimethylamino benzoate, phenylpropanedione, lucirin, and mixtures thereof can be chosen

And, the addition amount of the blue light curing initiator may be 1 to 10 parts by weight, 2 to 9 parts by weight, or 3 to 8 parts by weight per 100 parts by weight of the blue light curing resin.

On the other hand, after forming the decorative layer 400 and before forming the adhesive layer 600, a shape layer coating solution containing a solvent, a UV curing resin, and a UV curing initiator is applied on the decorative layer 400 so as to have a convex shape. A shape layer 500 may be formed. The shape layer 500 may be formed after UV-curing the decoration layer 400 . The shape layer 500 may be UV-cured after application of the coating solution.

The solvent is HEMA, butyl acetate, ethyl acetate, isopropyl alcohol, ethanol, diacetone alcohol, MIBK, cyclohexanone, ethoxydiglycol, methyl acetate, methylpyrrolidone, dimethyl carbonate, ethyl pyrrolidone, and mixtures thereof.

The UV-curable resin may be cured by UV light and may be selected from the group consisting of di-hema trimethylhexyl dicarbamate, acrylate/ethylhexyl acrylate/HEMA copolymer, and mixtures thereof.

The UV curing initiator may be selected from the group consisting of hydroxycyclohexylphenyl ketone, trimethylbenzoyldiphenylphosphine oxide, and mixtures thereof.

The shape layer 500 is characterized by having a convex shape. Due to the convex shape layer 500, the gel nail can have a convex shape as a whole, which not only gives a three-dimensional effect, but also improves a feminine aesthetic and glossiness, and can show an excellent appearance.

The convex shape of the shape layer 500 may appear in various forms. The convex shape may be formed on all or part of the shape layer 500, and there may be one or more convex shapes. The shape layer 500 may have a different thickness depending on the location. 2 shows a cross section of a shape layer 500 as an embodiment of the present invention. The shaped layer 500 having a cross section as shown in FIG. 2 is a dome-shaped shaped layer 500 that becomes thicker toward the center and thinner toward the edge. In this case, an effect of convexing the user's fingernails or toenails may be obtained.

The thickness of the shaped layer 500 may be 0.6 mm or less, 0.55 mm or less, or 0.5 mm or less, or the maximum thickness of the shaped layer 500 may be 0.3 to 0.5 mm, 0.35 to 0.5 mm, or 0.4 to 0.5 mm. . If the thickness of the shape layer 500 is less than the above range, the three-dimensional effect is insignificant, whereas if it exceeds the above range, the appearance may be damaged.

Bonding step of upper and lower layers

After manufacturing the upper layer and the lower layer, the upper and lower layers are compressed and bonded so that the semi-hardened gel layer 700 of the upper layer and the adhesive layer 600 of the lower layer come into contact with each other. At this time, the upper layer portion and the lower layer portion may be compressed while the adhesive layer 600 is uncured.

In addition, bonding may be performed by pressing using a roller, or other known methods may be used.

In addition, the gel nail may be manufactured by further including drying after bonding the upper and lower layers.

After bonding, the gel nail includes an adhesive layer 200, a substrate layer 300, a decorative layer 400, optionally a shape layer 500, an adhesive layer 600, a semi-cured gel layer (on the polyethylene terephthalate release layer 100) 700), a transparent printing layer or cured finishing layer 800, and a polyethylene terephthalate release layer 900 may have a sequentially stacked structure.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various modifications without departing from the gist of the present invention. Of course it is possible. Therefore, the scope of the present invention should not be construed as being limited to the above embodiments, and should be defined by not only the claims to be described later, but also those equivalent to these claims.

100 Polyethylene terephthalate release layer
200 adhesive layer
300 base layer
400 decorative layers
500 shape layers
600 adhesive layer
700 semi-hard gel layer
800 clear print layer or hard finish layer
900 polyethylene terephthalate release layer

Claims (6)

Forming a cured finish layer by applying a finishing layer coating solution containing a solvent, a slip agent, an ultraviolet curing resin and an ultraviolet curing initiator on a polyethylene terephthalate release layer, or containing a solvent and a thermosetting resin on the polyethylene terephthalate release layer Forming a transparent printing layer printed with transparent ink;
Forming a semi-cured gel layer by applying a gel coating solution containing a solvent, a thermosetting resin, a blue light curing resin, and a blue light curing initiator on the cured finishing layer or the transparent printing layer; and
A step of forming an upper layer, including drying;
Forming an adhesive layer by applying an adhesive on the polyethylene terephthalate release layer;
Forming a base layer by laminating a urethane film on the adhesive layer;
Forming a decorative layer for decorating nails on the base layer, and
A lower layer forming step comprising forming an adhesive layer on the decorative layer by applying a solvent and a thermosetting resin, or an adhesive layer coating solution containing a solvent, a blue light curing resin and a blue light curing initiator; and
and a bonding step of compressing the upper and lower layers so that the semi-hardened gel layer of the upper layer and the adhesive layer of the lower layer come into contact with each other. The method of claim 1,
The manufacturing method of a gel nail, characterized in that it further comprises the step of drying after the bonding step. The method of claim 1,
The method of manufacturing a gel nail, characterized in that the upper layer and the lower layer are compressed while the adhesive layer is uncured. The method of claim 1,
The lower layer forming step may include applying a shaped layer coating liquid containing a solvent, an ultraviolet curing resin, and an ultraviolet curing initiator on the decorative layer before forming the adhesive layer after forming the decorative layer, and forming the shaped layer to have a convex shape. A method for manufacturing a gel nail, characterized in that it further comprises. The method of claim 4,
The method of manufacturing a gel nail, characterized in that the thickness of the shaped layer is 0.6 mm or less, 0.55 mm or less, or 0.5 mm or less. The method of claim 1,
The method of manufacturing a gel nail, characterized in that the decorative layer comprises a material selected from the group consisting of dyes, pigments, glitters, metal foils, hologram foils, and combinations thereof.

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