KR102528810B1 - gel nail sticker - Google Patents

Abstract

A gel nail sticker is disclosed. The gel nail sticker of the present invention includes a base film layer in which a release film layer, an adhesive layer, and a soft base gel layer are sequentially laminated; a color layer laminated on top of the base film layer and having colors and patterns; a semi-cured layer laminated on top of the color layer and partially cured to have ductility; And a protective film layer laminated on the upper side of the semi-cured layer, wherein the semi-cured layer is formed through a process of printing semi-cured ink on the upper side of the color layer, and has a thickness of 500 to 700 μm. to be According to the present invention, by forming a semi-cured layer with a thickness of 500 to 700 μm on the upper side of the color layer through a one-degree printing process, it is possible to fundamentally prevent layer separation of the semi-cured layer itself, as well as to prevent the occurrence of layer separation through multi-stage printing. It is possible to increase the aesthetic effect by preventing the occurrence of cascading steps at the edges.

Description

gel nail sticker{gel nail sticker}

The present invention relates to a gel nail sticker that is used by being attached to a user's fingernail or toenail.

Recently, the beauty industry market has rapidly expanded, and at the same time, it has begun to be popularized by the general public. Nail art, a field of the beauty industry, is an essential element of art expressing the body regardless of age group and gender, and has recently undergone rapid development.

In general, nail art mainly consists of applying liquid pigments such as various colors of nail polish to fingernails or toenails. This method requires a technique for uniformly applying liquid pigments, and even if applied uniformly, it is difficult to dry them. Not only does it take a long time, but partial or total detachment occurs easily after drying, causing inconvenience to the user.

Accordingly, in recent years, UV gel nails, which are applied to fingernails or toenails using a liquid pigment containing a UV curable resin composition and then cured using a UV lamp, have been spotlighted.

As an example of a conventional UV gel nail sticker, as shown in FIG. 1, a base film (10, including a release film, an adhesive, and a flexible film), a color layer 20 provided on top of the base film, and a color layer 20 on top of the color layer. A UV semi-curing layer 40 provided, a primer 30 provided between the color layer and the UV semi-curing layer to provide adhesion between the color layer and the UV semi-curing layer, and a UV protective film provided on top of the UV semi-curing layer and removed during use by the user ( 50), etc.

Conventionally, the coating film thickness corresponding to one-time printing of the UV semi-curing layer 40 is 100 to 200 μm. By being formed, in order to realize the thickness of the entire UV semi-cured layer to 500 μm or more, it was possible to manufacture a UV semi-cured layer having a thickness of 500 μm or more only if a 2 or 3 degree printing process was performed.

However, such multi-stage overprinting has a problem of causing irregular outlines of the UV semi-curing layer 40, that is, the gel nail sticker, and in particular, the UV semi-curing layer 40 is formed in a dome shape to provide a three-dimensional effect. In this case, as shown in FIG. 1, a stepwise step is formed at the edge, resulting in a significant decrease in aesthetics of the product.

In addition, due to multi-stage overprinting, a great problem of separation between layers occurred due to adhesion problems between the first UV semi-cured layer 41, the second UV semi-cured layer 42, and the third UV semi-cured layer 43.

Republic of Korea Patent Publication No. 10-2019-0017832 (published on February 20, 2019)

The present invention has been made to solve the above-described conventional problems, and by forming a semi-cured layer having a thickness of 500 to 700 μm on top of a color layer through a one-degree printing process, the occurrence of layer separation of the semi-cured layer itself is fundamentally prevented. In addition, it is possible to increase the aesthetic effect by preventing the stepwise step of the edge corner occurring through multi-level printing, and to increase the production efficiency by simplifying the manufacturing process by omitting the primer between the color layer and the semi-curing layer. An object of the present invention is to provide a gel nail sticker that can be used.

According to one aspect of the present invention, a base film layer consisting of a release film layer, an adhesive layer and a soft base gel layer sequentially laminated; a color layer laminated on top of the base film layer and having colors and patterns; a semi-cured layer laminated on top of the color layer and partially cured to have ductility; And a protective film layer laminated on the upper side of the semi-cured layer, wherein the semi-cured layer is formed through a process of printing semi-cured ink on the upper side of the color layer, and has a thickness of 500 to 700 μm. A gel nail sticker is provided.

The semi-curing ink may provide a certain or more elasticity to the semi-curing layer and may include a highly elastic thermosetting resin composition having 70 to 75 parts by weight based on 100 parts by weight of the semi-curing ink; A UV curable resin composition that reacts to ultraviolet rays and has 20 to 25 parts by weight based on 100 parts by weight of the semi-curing ink; and a silane base additive having 1 to 6 parts by weight based on 100 parts by weight of the semi-curing ink.

The high modulus thermosetting resin composition includes a high modulus polyester resin having 50 to 70 parts by weight based on 100 parts by weight of the high modulus thermosetting resin composition, and does not include acrylic, urethane and epoxy resins.

The UV curable resin composition may include a monomer having 80 to 85 parts by weight based on 100 parts by weight of the UV curable resin composition; And 2 to 10 parts by weight based on 100 parts by weight of the UV curable resin composition, and a photoinitiator having an optical wavelength range of 390 nm to 420 nm, and does not contain oligomers.

The monomer may be a monofunctional monomer.

The monomer may be a polyester-based monomer.

The photoinitiator may be a phospine oxide-based photoinitiator.

The semi-curing ink may further include an acrylic-based antifoaming agent.

The semi-curing ink as a whole may have a viscosity of 4,000 to 6,000 CPS, and the high elasticity thermosetting resin composition before mixing may have a viscosity of 15,000 to 18,000 CPS.

The semi-cured layer is formed by providing a printing plate above the color layer and allowing the semi-cured ink to pass through the printing plate and then guide it to the upper side of the color layer. a screen provided to; and an emulsion film formed on the upper and lower surfaces of the screen to prevent the semi-curing ink from passing through and having a thickness of 500 to 700 μm.

The emulsion film may include a top coat emulsion film formed on the upper surface of the screen to prevent passage of the semi-cured ink and having a thickness of 350 to 500 μm; and an undercoat emulsion film provided on the lower surface of the screen at a position corresponding to the top coat emulsion film and formed to a thickness of 150 to 200 μm.

The printing plate may be sequentially performed through the following processes.

(a) To form the top oil film on the upper surface of the screen, an oil agent is applied twice with a first predetermined thickness, and to form the lower surface oil film on the lower surface of the screen, the oil agent is applied to a second predetermined thickness. After applying twice, heating at 45 to 55 degrees for 15 to 25 minutes; (b) After the step (a), an emulsion is additionally applied twice at a first predetermined thickness to form the top oil film on the upper surface of the screen, and to form the oil film on the lower surface of the screen. After applying the emulsion two times at a second predetermined thickness, heating at 45 to 55 degrees for 15 to 25 minutes; (c) after the step (b), additionally applying an emulsion 5 times at a second predetermined thickness to form an emulsion film on the undercoating surface on the lower surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (d) after step (c), additionally applying an emulsion 5 times at a second predetermined thickness to form an emulsion film on the undercoating surface on the lower surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (e) after the step (d), additionally applying an emulsion three times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (f) after step (e), additionally applying an emulsion three times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (g) after step (f), additionally applying an emulsion three times at a first preset thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (h) after step (g), additionally applying an emulsion 5 times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes; (i) after step (h), to form an emulsion film on the upper surface of the screen, additionally applying an emulsion 5 times to a first predetermined thickness, followed by heating at 45 to 55 degrees for 55 to 65 minutes; (j) after the step (i), additionally applying an emulsion 5 times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 55 to 65 minutes; Here, the first preset thickness is 12 to 18㎛, the second preset thickness is 10 to 15㎛

According to the gel nail sticker of the present invention described above, by forming a semi-curing layer having a thickness of 500 to 700 μm on top of the color layer through a one-degree printing process, it is possible to fundamentally prevent the layer separation of the semi-curing layer itself. In addition, it is possible to increase the aesthetic effect by preventing the occurrence of cascading steps at the edge corners that occur through multi-level printing.

In addition, the production efficiency can be increased by simplifying the manufacturing process by omitting the primer between the color layer and the semi-cured layer.

In addition, by mixing 1 to 6 parts by weight of the silane-based additive, the bonding strength between the color layer and the semi-cured layer is significantly increased, so that the adhesion state of the semi-cured layer to the color layer can be firmly maintained even without a primer intervening.

In addition, since the UV curable resin composition does not contain an oligomer and contains a polyester-based monofunctional monomer, when a user cures a gel nail sticker using a simple UV curing machine, not only can the curing of the semi-cured layer be achieved quickly. In addition, it may be matched with a highly elastic thermosetting resin composition including a highly elastic polyester resin to provide a synergistic effect in terms of providing elasticity of the gel nail sticker.

In addition, since the photoinitiator is based on Phospine oxide and has an optical wavelength range of 390 nm to 420 nm, even if a user uses a simple curing machine with very weak UV output commonly used at home, not only can an optimal UV curing reaction occur, but also a semi-curing layer It is possible to prevent a decrease in the aesthetics of the product by preventing a decrease in transparency of the product.

In addition, even if a semi-cured layer thickness of 500㎛ or more is formed through 1-degree printing through an acrylic defoamer, air bubbles inside the semi-cured layer can be easily removed, transparency is not impaired, and surface smoothness is maintained to maintain the dome of the entire gel nail sticker. ) The shape is also natural, soft and feasible.

1 is a cross-sectional view showing a gel nail sticker according to the prior art;
2 is a cross-sectional view showing a gel nail sticker according to an embodiment of the present invention;
3 is a cross-sectional view showing a printing plate for manufacturing a gel nail sticker according to an embodiment of the present invention;
4 is a table sequentially showing a process of manufacturing a printing plate for manufacturing a gel nail sticker according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, only these embodiments will complete the disclosure of the present invention, and will fully cover the scope of the invention to those skilled in the art. It is provided to inform you. Like reference numerals designate like elements in the drawings.

In the gel nail sticker according to a preferred embodiment of the present invention, a semi-curing layer (dome-curing layer) having a thickness of 500 to 700 μm is formed through a process of printing semi-curing ink once to laminate a dome-shaped printing layer (semi-curing layer) on top of a color layer. By forming a shape printed layer), it is possible to fundamentally prevent layer separation of the semi-cured layer compared to the semi-cured layer of the conventional multi-layer structure (multi-stage printing), as well as to prevent the occurrence of stepped steps at the edge edges caused by multi-layer printing. This can lead to an increase in aesthetic effect.

Hereinafter, the present invention will be described in detail with reference to examples.

As shown in FIG. 2, the gel nail sticker according to an embodiment of the present invention includes a base film layer 100, a color layer 200, a semi-curing layer 300, and a protective film layer 400.

First, as shown in FIG. 2, the base film layer 100 is formed in a state in which a release film layer 110, an adhesive layer 120, and a soft base gel layer 130 are sequentially laminated.

The release film layer 110 may employ a PET film having excellent release properties, and an adhesive layer 120 is formed by applying an adhesive to a predetermined thickness on the release film layer 110 . At this time, as the adhesive, it is possible to apply a non-toxic adhesive that is harmless to the human body that is already commonly used. The base gel layer 130 is made in the form of a transparent or translucent film and is provided on the upper side of the adhesive layer 120, and in the embodiment of the present invention, the base gel layer 130 can be applied as a PU film.

Next, the color layer 200 is laminated on top of the base film layer 100 to impart color and patterns to the nail sticker.

The color layer 200 includes at least one of colors, glitters, patterns, letters, and patterns, and functions to provide visual effects due to nail stickers. The color layer 200 may be formed in various ways, such as applying using a roller, spray, silk screen, or printing method, or using a printing method using a nozzle, in order to realize the various visual effects described above, and is a design element. It can be formed in multiple layers to enhance aesthetics due to.

As shown in FIG. 2, the semi-cured layer 300 is laminated on top of the color layer 200 and partially cured to have ductility. The detailed composition of the semi-hardened layer 300 will be described in detail below.

In addition, the protective film layer 400 is laminated on the upper side of the semi-curing layer 300, and includes a UV absorber, which is a UV blocking material, to absorb ultraviolet rays so that the semi-curing layer 300 is completely cured before the user uses the gel nail sticker. can prevent it from happening. This protective film layer 400 is removed by the user after the user attaches the gel nail sticker to the fingernail or toenail and before curing the gel nail sticker using an ultraviolet curing machine (led simple UV curing machine) described later. The protective film layer 400 may use a UV absorber such as a benzotriazole-based or triazine-based UV absorber.

As shown in FIG. 2, in an embodiment of the present invention, the semi-cured layer 300 is formed through a process of printing a semi-cured ink on the upper side of the color layer 200, and its thickness is 500 to 700 μm. is formed with

That is, the present invention does not form a semi-cured layer by employing a multi-layer printing process to implement a semi-cured layer of sufficient thickness, but by forming a semi-cured layer through a simple process of printing one degree of semi-cured ink, so that the conventional multi-layer structure (multi-stage printing) Compared to the semi-cured layer, the layer separation of the semi-cured layer can be fundamentally prevented, and the occurrence of stepped steps at the edge edges caused by multi-level printing can be prevented, and the aesthetic effect can be increased by implementing a sophisticated outline.

Specifically, as shown in FIGS. 2 and 3 , the semi-curing layer 300 provides a printing plate 500 on the upper side of the color layer 200, and after the semi-curing ink passes through the printing plate 500, the color It is formed by leading to the top of the layer 200.

Hereinafter, a printing plate 500 for forming a semi-cured layer 300 with a thickness of 500 to 700 μm by printing semi-cured ink once will be described in detail.

As shown in FIG. 3, the printing plate 500 is provided with a screen 510 provided to pass semi-cured ink, and upper and lower surfaces of the screen 510 to prevent semi-cured ink from passing through, but 500 to 700 μm. It includes an emulsion film 520 formed to a thickness of

Here, the emulsion film 520 is provided on the upper surface of the screen 510 to prevent semi-curing ink from passing through, and is formed to a thickness of 350 to 500 μm. It is provided on the lower surface of the screen 510 at a corresponding position and includes an undercoating emulsion film 522 formed to a thickness of 150 to 200 μm.

On the other hand, after forming the top/bottom emulsion film on the upper and lower surfaces of the screen 510 as a whole, a shape corresponding to the gel nail sticker can be formed on the printing plate 500 through exposure and etching processes. In addition, due to the nature of the continuous printing process, the empty space between the emulsion film 522 on the undercoat and the screen 510 is filled with semi-curing ink, and the empty space between the emulsion film 521 and the screen 510 is filled. A semi-cured layer 300 having a thickness of 500 to 700 μm may be formed on the upper side of the color layer 200 while the semi-cured ink filled in is pressed downward and the ink is lowered.

As described above, the present invention forms the upper coating emulsion film 521 with a thickness of 350 to 500 μm and forms the lower coating emulsion film 522 with a thickness of 150 to 200 μm, so that the upper side of the color layer 200 When the semi-curing layer 300 is formed by printing one degree of semi-curing ink, it is possible to prevent stepwise steps from occurring on the edge outline of the semi-curing layer 300 and to form a precise outline, as well as to form a semi-curing layer ( 300), it is possible to significantly reduce the occurrence of defective nail stickers.

For example, when the thickness of the top coat emulsion film 521 is less than 350 μm and the thickness of the bottom coat emulsion film 522 exceeds 200 μm, specifically, the top coat emulsion film 521 has a thickness of 150 to 200 μm. ) and form an undercoat emulsion film 522 with a thickness of 350 to 500 μm to apply a thickness of the upper coat emulsion film 521 thinner than the thickness of the undercoat emulsion film 522, the screen 510 The drop-down property of the semi-cured ink passing through is deteriorated, resulting in a situation in which it is difficult to print the semi-cured layer 300 having a desired thickness of 500 to 700 μm, and it is difficult to precisely form the edge outline of the semi-cured layer 300. there is.

In addition, the top coat emulsion film 521 is formed with a thickness of 400 to 550 μm and the undercoat emulsion film 522 is formed with a thickness of 100 to 150 μm so that the thickness of the top coat emulsion film 521 is the undercoat emulsion film 521. When formed to be about 3 times or more of the thickness of 522, similarly, the printed coating film formed through 1-degree printing is formed thinner than the thickness of the printing plate 500, eventually printing a semi-cured layer 300 having a thickness of 500 to 700 μm. It is difficult to do this, and a large amount of air bubbles are generated in the semi-hardened layer 300, which increases the defect rate due to the deterioration of the appearance quality of the gel nail sticker.

In the embodiment of the present invention, the printing plate 500 sequentially goes through the process shown in the table of FIG. 4, and then implements a shape corresponding to the gel nail sticker through an exposure and etching process.

Here, the first preset thickness is 12 to 18 μm, and the second preset thickness is 10 to 15 μm. Also, the emulsion is FOTECOAT-1000 from FOTEC.

Specifically, to form the top oil film 521 on the upper surface of the screen 510, the oil agent is applied twice to a first predetermined thickness, and the lower surface oil film 522 is formed on the lower surface of the screen 510. For formation, the emulsion is applied twice with a second predetermined thickness, and then dried by heating at 45 to 55 degrees for 15 to 25 minutes (step a).

Thereafter, after step (a), an oil agent is additionally applied twice to a first predetermined thickness to form an upper oil film 521 on the upper surface of the screen 510, and an oil film on the lower surface of the screen 510. (522) For formation, the emulsion is additionally applied twice to a second predetermined thickness, and then dried by heating at 45 to 55 degrees for 15 to 25 minutes (step b).

Subsequently, after step (b), an emulsion is additionally applied 5 times to a second predetermined thickness to form an undercoating emulsion film 522 on the lower surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step c).

Subsequently, after step (c), an emulsion is additionally applied 5 times to a second predetermined thickness to form an undercoating emulsion film 522 on the lower surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step d).

Through the step (d), the formation of the emulsion film 522 on the undercoating surface is completed.

On the other hand, the number of times of applying the oil agent in steps (c) and (d) and the number of times of applying the oil agent in steps (i) and (j) described later are the same, but there is a mutual difference in heating time. To elaborate on this, the surface of the undercoat emulsion film formed through steps (c) and (d) is different from the surface of the top coat emulsion film formed through steps (i) and (j). ), and does not require as much curing as the surface of the top coat emulsion film, as it is not a part in direct contact with the surface, and natural curing occurs while the steps (e) to (j) described below are performed, so the heating condition of 15 to 25 minutes It is also possible to efficiently form an emulsion film on the undercoat.

Subsequently, after step (d), an emulsion is additionally applied three times to a first predetermined thickness to form a top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step e).

Subsequently, after step (e), an emulsion is additionally applied three times at a first predetermined thickness to form a top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step f).

Subsequently, after step (f), an emulsion is additionally applied three times to a first predetermined thickness to form a top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step g).

Subsequently, after step (g), an emulsion is additionally applied 5 times to a first predetermined thickness to form a top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 15 to 25 minutes. Dry (step h).

Subsequently, after step (h), an emulsion is additionally applied 5 times to a first predetermined thickness to form a top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 55 to 65 minutes. Dry completely (step i).

Finally, after step (i), the emulsion is additionally applied 5 times to the first predetermined thickness to form the top coat emulsion film 521 on the upper surface of the screen 510, and then heated at 45 to 55 degrees for 55 to 65 minutes. to dry completely (step j).

On the other hand, the number of times the oil agent is applied in the steps (c) and (d) and the number of times the oil agent is applied in the steps (i) and (j) are the same, but there is a mutual difference in the heating time. To elaborate on this, the surface of the top coat emulsion film formed through steps (i) and (j) is different from the surface of the undercoat emulsion film formed through steps (c) and (d). ), a relatively high degree of surface hardening is required compared to the surface of the undercoating emulsion film.

If the surface of the top coat emulsion film formed through steps (i) and (j) is not completely cured and the surface curing degree is lower than the set value, if the printing operation is performed using a squeegee, the friction with the squeegee may cause damage. A phenomenon in which the edge of the drawing emulsion film cannot maintain a precise set shape and falls off may occur, and accordingly, it is impossible to realize a precise line around the edge of the semi-cured layer 300, resulting in a defect.

Therefore, in the embodiment of the present invention, the heat drying time in steps (i) and (j) is increased by a certain length or longer compared to other steps to completely dry the upper surface of the top coat emulsion film 521, thereby solving the above problems. occurrence can be prevented.

The present invention manufactures the printing plate 500 by forming the top oil film 521 and the bottom oil film 522 on the screen 510 sequentially through steps (a) to (j) as described above, It is possible to prevent self-layer separation of the painting emulsion film and the undercoating emulsion film, thereby increasing the durability of the printing plate.

Meanwhile, the present invention proposes an additional method for manufacturing a printing plate other than the method of forming the printing plate through the application of oil to the upper and lower surfaces of the screen 510 as described above.

Specifically, it is a method of pouring an emulsion into a molding mold, heating and drying to form a plate-shaped film-type emulsion film, and then attaching it to the upper and lower surfaces of the screen 510. The aesthetic quality of the gel nail sticker may be improved by elaborately forming an outline corresponding to the edge of the gel nail sticker through exposure and etching.

In other words, after pouring an emulsion to a thickness of 350 to 500 μm in the mold, heating and drying to form a top coat emulsion film, the top coat emulsion film is separated from the mold and attached to the upper surface of the screen 510. . At this time, since the top coat emulsion film separated from the mold has a certain viscosity or higher, it can be attached to the upper surface of the screen without using a separate adhesive.

In addition, after pouring the emulsion to a thickness of 150 to 200 μm into the molding mold, heating and drying to form an undercoating emulsion film, the undercoating emulsion film may be separated from the molding die and attached to the lower surface of the screen 510. At this time, since the undercoating emulsion film separated from the mold has a certain viscosity or more, it can be attached to the lower surface of the screen without using a separate adhesive.

In such a plate-shaped film-type emulsion film, since the top and bottom oil films are each composed of one layer, compared to the case where the oil film is formed through the above-mentioned steps (a) to (j), the oil film By fundamentally preventing the separation between the layers, it is possible to prevent a decrease in durability even if the printing operation is repeatedly performed for a long time and many times.

In addition, since a number of processes such as steps (a) to (j) described above are not required, rapid manufacturing of printing plates is possible, resulting in a reduction in manufacturing time.

Hereinafter, semi-cured ink will be described in detail.

In an embodiment of the present invention, the semi-curing ink is a kind of hybrid type ink and includes a high elasticity thermosetting resin composition, a UV curing resin composition, a silane base additive and an acrylic defoaming agent.

First, the highly elastic thermosetting resin composition is cured by heat at a certain temperature or higher, and can provide the semi-cured layer 300 with high ductility and elasticity of a certain level or more due to partial curing.

In an embodiment of the present invention, the high elasticity thermosetting resin composition is prepared to have 70 to 75 parts by weight based on 100 parts by weight of the semi-curing ink.

Here, when the high-elasticity thermosetting resin composition is mixed in an amount of less than 70 parts by weight, the heat drying time required to sufficiently dry the semi-cured layer 300 is about 1 hour or more due to the manufacturing process, so productivity is inevitably lowered. In addition, since the content of the UV curable resin composition that does not react to heat is relatively increased during the heat drying process, the time required for the consumer to fully cure the semi-cured layer 300 with UV light for the use of a gel nail sticker increases, resulting in UV curing During the process, the stickiness of the product surface significantly increases the possibility of causing stains on the product surface and deteriorating aesthetics.

Conversely, when the high modulus thermosetting resin composition is mixed in excess of 75 parts by weight, the content of the UV curable resin composition that does not react to heat is relatively reduced during the heat drying process, so most of the semi-cured layer 300 is dried in the heat drying process to give a radius There is a problem of significantly reducing the elasticity (flexibility) of the image layer 300, eventually, the gel nail sticker product. In addition, as described above, due to the reduced flexibility of the gel nail sticker including the semi-curing layer 300, that is, the tendency to maintain the shape of the printed state of the semi-curing layer 300 on the color layer 200 becomes stronger. When a bar consumer attaches a gel nail sticker to a nail (toenail), it is not uniformly attached as a whole along the curved surface of the nail, and the part corresponding to the rim of the nail is not attached and easily falls off.

In an embodiment of the present invention, the high modulus thermosetting resin composition includes a high modulus polyester resin and a solvent having 50 to 70 parts by weight based on 100 parts by weight of the high modulus thermosetting resin composition, and does not include acrylic, urethane and epoxy resins.

Here, the high modulus polyester resin can implement high transparency compared to urethane and epoxy resin, and can have relatively high flexibility although the transparency is lower than that of acrylic resin. In the present invention, acrylic, urethane and By including only the highly elastic polyester resin without including the epoxy resin, it is possible to provide the semi-cured layer 300 having a thickness of 500 to 700 μm with high transparency and at least a certain level of elasticity (flexibility).

Here, when the high modulus polyester resin is less than 50 parts by weight, the viscosity of the semi-cured ink is lowered due to the relatively high content of the solvent. In the case of forming the semi-hardened layer 300, a problem occurs in that the thickness of 500 to 700 μm set uniformly as a whole is not formed, and a thickness smaller than this is formed. In addition, due to the decrease in viscosity of the semi-cured ink, after the semi-cured ink is printed on the upper side of the color layer 200, a phenomenon of flowing down of the semi-cured ink occurs, so that the edge outline of the semi-cured layer 300 does not maintain the set shape. That is, a defect in which the outer line is not uniformly located occurs.

On the contrary, when the high modulus polyester resin is mixed in excess of 70 parts by weight, most of the semi-cured layer 300 is dried during the heat drying process, which significantly reduces the elasticity (flexibility) of the semi-cured layer 300, eventually the gel nail sticker product. there is In addition, as described above, due to the reduced flexibility of the gel nail sticker including the semi-curing layer 300, that is, the tendency to maintain the shape of the printed state of the semi-curing layer 300 on the color layer 200 becomes stronger. When a bar consumer attaches a gel nail sticker to a nail (toenail), it is not uniformly attached as a whole along the curved surface of the nail, and the part corresponding to the rim of the nail is not attached and easily falls off.

Next, the UV curable resin composition is cured in response to ultraviolet rays, and is completely cured into a shape corresponding to the shape of the user's fingernails or toenails by a UV curing machine or ultraviolet rays exposed in daily life, thereby exhibiting adhesion and durability to the fingernails and toenails. can provide.

In an embodiment of the present invention, the UV curable resin composition is prepared to have 20 to 25 parts by weight based on 100 parts by weight of the semi-curing ink.

Here, the UV curable resin composition includes a monomer having 80 to 85 parts by weight based on 100 parts by weight of the UV curable resin composition, and a photoinitiator having 2 to 10 parts by weight based on 100 parts by weight of the UV curable resin composition and having a light wavelength region of 390 nm to 420 nm, , oligomers are not included.

That is, the UV curable resin composition (UV curable ink) currently used in gel nail stickers usually consists of oligomers, monomers, photoinitiators and additives, but the present invention does not include oligomers and consists only of monomers and photoinitiators.

In other words, when the oligomer is included, the flatness of the printing surface of the semi-curing layer 300 is lowered and the surface of the gel nail sticker becomes rough, and when the user wants to cure the gel nail sticker with UV light using a UV curing machine, etc. In particular, there is a disadvantage in that the curing reaction occurs very slowly for the LED simple UV curing machine. Therefore, when a user cures using a simple LED UV curing machine at home, the time required for curing significantly increases, and a shortage occurs even in the completely cured part, and consumers may feel considerable inconvenience in using it. In the present invention, by mixing polyester-based monomers, the surface of the gel nail sticker can be prevented from becoming rough, thereby increasing product completion.

In addition, since the curing reaction of the UV curing resin composition for the LED simple UV curing machine occurs very slowly, the semi-curing layer 300 for a long time during the curing process, eventually the surface hardness of the gel nail sticker remains low for a long time In the process of bar hardening, surface scratches and contamination can easily occur.

In an embodiment of the present invention, the monomer is applied as a polyester-based monomer.

In general, there are various types of monomers such as polyester, acrylic, urethane, epoxy, silicone, etc., but in the present invention, the high elasticity thermosetting resin composition includes a high elasticity polyester resin having 50 to 70 parts by weight, and has high elasticity A polyester-based monomer is applied so that the characteristics of high modulus polyester, which is the main material of the thermosetting resin composition, are generated as efficiently as possible.

For reference, the simple LED UV curing device commonly used by users at home has a UV wavelength range of 390 nm to 420 nm, and the output is so weak that it is difficult for the instrument to measure.

On the other hand, when an oligomer is contained, there is a problem in that it is difficult to cause rapid curing using a simple UV curing machine. In order to induce sufficiently fast curing of the UV curing resin composition even through such a simple curing machine, the present invention, as described above, It does not contain oligomers and constitutes a UV curable resin composition only with monomers and photoinitiators.

In the embodiment of the present invention, the monomer is applied as a monofunctional monomer of the polyester series as a monofunctional monomer.

If the UV curing resin composition contains a monomer with many functional groups, the UV curing reaction occurs relatively slowly. Therefore, when a user cures a gel nail sticker using a simple UV curing machine at home, the rapid curing of the semi-curing layer 300 is achieved. Since it is difficult to achieve, the present invention can provide a rapid curing reaction even using a UV simple curing machine by including a polyester-based monofunctional monomer roll.

On the other hand, in order to generate an optimal UV curing reaction in a simple curing machine with very weak UV output commonly used by users at home, the selection and content of the photoinitiator that initiates the UV curing reaction is very important.

To this end, the present invention applies a photoinitiator capable of the most dramatic initiation activity in the main wavelength range of 390nm to 420nm, which is the main wavelength of the led simple UV curing machine, and is mixed with 2 to 10 parts by weight compared to 100 parts by weight of the UV curing resin composition.

In addition, in the embodiment of the present invention, the photoinitiator is applied as a photoinitiator based on Phospine oxide.

That is, the present invention is a UV curable resin composition, that is, a semi-curing layer (300 ) can be efficiently cured.

In other words, the camphoroquinone-based photoinitiator can also induce sufficient initiation activity in the 390 nm to 420 nm wavelength band, but the camphoroquinone-based photoinitiator has a yellow color, so when included in the UV curing resin composition, the transparency of the semi-curing layer 300 is reduced, resulting in aesthetic aesthetics. There is a problem with the feeling falling.

On the other hand, the phospine oxide-based photoinitiator applied in the present invention has a more transparent color than the camphoroquinon-based photoinitiator, and has excellent polymerization efficiency with polyester-based monofunctional monomers.

In addition, other photoinitiators that react in the wavelength range of 390 nm to 420 nm include 1-phenyl-1,2-propanedione / p-octyloxy-phenyl-phenyl iodonium hexafluoroantimonate, but polymerization efficiency and transparency with monofunctional monomers of polyester series It is inefficient and causes many disadvantages compared to phospine oxide-based photoinitiators in terms of , color, and solubility.

In an embodiment of the present invention, the phospine oxide-based photoinitiator is mixed in 2 to 10 parts by weight based on 100 parts by weight of the UV curable resin composition. The degree of UV curing of the semi-curing layer 300 is insufficient, so that the stickiness of the gel nail sticker surface (semi-curing layer) remains even after the user hardens it using a simple led UV curing machine.

In addition, when the Phospine oxide-based photoinitiator is mixed in excess of 10 parts by weight, the PhospineOxide photoinitiator that has not reacted to the LED simple UV curing unit remains, resulting in a yellowing phenomenon in which the semi-cured layer 300 turns yellow, and thus gel nails It causes a considerable adverse effect on the aesthetic part of the sticker.

Next, a silane base additive is mixed so as to have 1 to 6 parts by weight based on 100 parts by weight of the semi-curing ink.

In an embodiment of the present invention, the silane base additive is mixed to increase mutual adhesion between the color layer 200 and the semi-cured layer 300, and the present invention is to improve mutual adhesion between the color layer and the semi-cured layer. In the meantime, sufficient adhesive strength can be provided with only the silane base additive without intervening a separate primer or the like.

In other words, the present invention mixes 1 to 6 parts by weight of a silane base additive with 100 parts by weight of semi-curing ink in semi-curing ink to form trihydroxy as follows, thereby forming the printing surface (upper side) of the color layer 200. surface) and the semi-cured layer 300 may provide adhesive force so that strong bonding is achieved.

Therefore, even if the semi-cured layer 300 is formed by directly printing the semi-cured ink on the color layer 200 without adding a printing process such as a primer, interlayer separation between the color layer 200 and the semi-cured layer 300 occurs. can definitely be prevented.

Here, when the mixing ratio of the silane base additive is less than 1 part by weight, the amount of trihydroxy produced is too small to provide a certain level of adhesive strength, and interlayer separation between the color layer and the semi-cured layer may occur.

Conversely, when the mixing ratio of the silane base additive exceeds 6 parts by weight, the thermal reaction rate of the semi-cured ink is greatly increased, so that the semi-cured layer 300 printed on the upper side of the color layer 200 in a heat drying process becomes jelly in a short time. It changes like a shape, making continuous work in the printing process impossible. In addition, when the mixing ratio of the silane base additive exceeds 6 parts by weight, the printing surface (surface of the semi-cured layer) reacts rapidly with the NCO of the curing agent added to the semi-cured ink during the 1-degree printing process using the actual semi-cured ink. It becomes rough and a problem arises in surface smoothness.

Next, in an embodiment of the present invention, the semi-curing ink further includes an acrylic-based antifoaming agent.

In the present invention, the semi-curing layer 300 has a thickness of 500 to 700 μm through 1-degree printing of semi-curing ink. It is formed in thickness, but this thickness formed by one-degree printing cannot be seen as thin.

In general, as the coating film thickness of the printed layer formed by one-color printing increases, more air bubbles are generated in the printed layer and there is a problem in that they are not easily defoamed. In order to improve this, a material having antifoaming power should be added to the printing ink, but generally used silicon-based additives cause a cloudiness phenomenon and impair the transparency of the product (gel nail sticker).

In order to prevent this problem from occurring, the present invention adds 1 to 10 parts by weight of an acrylic antifoaming agent to 100 parts by weight of the semi-cured ink in the semi-cured ink. Therefore, even if a thickness of the semi-cured layer 300 of 500 μm or more is formed by one-time printing, air bubbles inside the semi-cured layer 300 can be easily removed, transparency is not impaired, and surface smoothness is maintained to maintain the dome of the entire gel nail sticker. The shape of the dome is also natural, soft and feasible.

In an embodiment of the present invention, the semi-curing ink is made to have a viscosity of 4,000 to 6,000 CPS as a whole, and the high elasticity thermosetting resin composition constituting the semi-curing ink, the UV curing resin composition, and the silane base additive are mixed with each other before the high elasticity heat. The cured resin composition is made to have a viscosity of 15,000 to 18,000 CPS.

The applicant of the present invention repeatedly conducted a number of experiments and confirmed that the viscosity of the semi-cured ink should be maintained at 4,000 to 6,000 CPS in order to form a semi-cured layer having a thickness of 500 to 700 μm without defects through a 1-color printing process. In addition, when the viscosity of the semi-curing ink is lower than 4,000 CPS, the thickness of the semi-curing layer (printing film thickness) decreases and the semi-curing ink flows outside the set edge outline (outside the edge of the gel nail sticker), resulting in product defects. confirmed to have occurred.

In addition, when the viscosity of the semi-cured ink exceeds 6,000 CPS, the drop-down property of the semi-cured ink through the printing plate is deteriorated during printing of the semi-cured layer, so that the set edge outline (outside the edge of the gel nail sticker) is elaborate. It was confirmed that a problem that could not be formed occurred.

To sum up, the present applicant printed a semi-cured ink through a number of experiments to form a semi-cured layer 300 with a thickness of 500 to 700 μm on the upper side of the color layer 200, the high elasticity thermosetting resin composition, It was confirmed that an optimized ink printing result was obtained in a state in which the total viscosity of the semi-cured ink composed of the UV curable resin composition, the silane base additive, and the acrylic defoaming agent had a viscosity of 4,000 to 6,000 CPS.

Specifically, before mixing the composition, additives, and antifoaming agent, the high elasticity thermosetting resin composition has a viscosity of 15,000 to 18,000 CPS, and the UV curing resin composition, silane base additive, acrylic antifoaming agent and solvent (alcohol or acetone) are added to Overall, the viscosity of the semi-cured ink was adjusted to have a viscosity of 4,000 to 6,000 CPS.

In the above, the present invention has been shown and described in relation to preferred embodiments for illustrating the principles of the present invention, but the present invention is not limited to the configuration and operation as shown and described. Rather, it will be appreciated by those skilled in the art that many changes and modifications may be made to the present invention without departing from the spirit and scope of the appended claims.

100: base film layer 110: release film layer
120: adhesive layer 130: base gel layer
200: color layer 300: semi-curing layer
400: protective film layer 500: printing plate
510: screen 520: emulsion film
521: top coat emulsion film 522: bottom coat emulsion film

Claims (12)

a base film layer in which a release film layer, an adhesive layer, and a soft base gel layer are sequentially laminated;
a color layer laminated on top of the base film layer and having colors and patterns;
a semi-cured layer laminated on top of the color layer and partially cured to have ductility; and
Including a protective film layer laminated on the upper side of the semi-cured layer,
The semi-curing layer is formed through a process of printing a semi-curing ink on the upper side of the color layer, and has a thickness of 500 to 700 μm,
The semi-curing layer is formed by providing a printing plate on the upper side of the color layer and allowing the semi-curing ink to pass through the printing plate and then guide it to the upper side of the color layer,
The printing plate,
a screen through which the semi-cured ink passes; and
A gel nail sticker comprising an emulsion film formed on the upper and lower surfaces of the screen to prevent the semi-curing ink from passing through and formed to a thickness of 500 to 700 μm. According to claim 1,
The semi-curing ink,
a highly elastic thermosetting resin composition capable of providing a certain or more elasticity to the semi-curing layer and having 70 to 75 parts by weight based on 100 parts by weight of the semi-curing ink;
A UV curable resin composition that reacts to ultraviolet rays and has 20 to 25 parts by weight based on 100 parts by weight of the semi-curing ink; and
A gel nail sticker, characterized in that mixed with a silane base additive having 1 to 6 parts by weight based on 100 parts by weight of the semi-curing ink. According to claim 2,
The high elasticity thermosetting resin composition includes a high elasticity polyester resin having 50 to 70 parts by weight based on 100 parts by weight of the high elasticity thermosetting resin composition, and does not contain acrylic, urethane and epoxy resins Gel nail sticker. According to claim 2 or 3,
The UV curable resin composition,
A monomer having 80 to 85 parts by weight based on 100 parts by weight of the UV curable resin composition; and
It has 2 to 10 parts by weight relative to 100 parts by weight of the UV curable resin composition, and includes a photoinitiator having an optical wavelength region of 390 nm to 420 nm,
A gel nail sticker characterized in that it does not contain oligomers. According to claim 4,
The monomer is a gel nail sticker, characterized in that the monofunctional monomer. According to claim 4,
The monomer is a gel nail sticker, characterized in that the polyester-based monomer. According to claim 4,
The photoinitiator is a gel nail sticker, characterized in that the phospine oxide-based photoinitiator. According to claim 2,
The semi-curing ink further comprises an acrylic-based antifoaming agent, characterized in that the gel nail sticker. According to claim 2,
The semi-curing ink has a viscosity of 4,000 to 6,000 CPS as a whole,
The gel nail sticker, characterized in that the high elasticity thermosetting resin composition before mixing has a viscosity of 15,000 to 18,000 CPS. delete According to claim 1,
The emulsion film,
a top coat emulsion film formed on the upper surface of the screen to prevent the semi-curing ink from passing through and having a thickness of 350 to 500 μm; and
A gel nail sticker characterized in that it comprises a bottom oil film formed on the lower surface of the screen at a position corresponding to the top oil film and formed to a thickness of 150 to 200 μm. According to claim 11,
The gel nail sticker, characterized in that the printing plate is made sequentially through the following process.
(a) To form the top oil film on the upper surface of the screen, an oil agent is applied twice with a first predetermined thickness, and to form the lower surface oil film on the lower surface of the screen, the oil agent is applied to a second predetermined thickness. After applying twice, heating at 45 to 55 degrees for 15 to 25 minutes;
(b) After the step (a), an emulsion is additionally applied twice at a first predetermined thickness to form the top oil film on the upper surface of the screen, and to form the oil film on the lower surface of the screen. After applying the emulsion two times at a second predetermined thickness, heating at 45 to 55 degrees for 15 to 25 minutes;
(c) after the step (b), additionally applying an emulsion 5 times at a second predetermined thickness to form an emulsion film on the undercoating surface on the lower surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(d) after step (c), additionally applying an emulsion 5 times at a second predetermined thickness to form an emulsion film on the undercoating surface on the lower surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(e) after the step (d), additionally applying an emulsion three times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(f) after step (e), additionally applying an emulsion three times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(g) after step (f), additionally applying an emulsion three times at a first preset thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(h) after step (g), additionally applying an emulsion 5 times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 15 to 25 minutes;
(i) after step (h), to form an emulsion film on the upper surface of the screen, additionally applying an emulsion 5 times to a first predetermined thickness, followed by heating at 45 to 55 degrees for 55 to 65 minutes;
(j) after the step (i), additionally applying an emulsion 5 times at a first predetermined thickness to form an emulsion film on the upper surface of the screen, followed by heating at 45 to 55 degrees for 55 to 65 minutes;
Here, the first predetermined thickness is 12 to 18㎛,
The second preset thickness is 10 to 15 μm.

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