KR20210061025A - Midia for nail sticker - Google Patents

Abstract

The present invention relates to a recording medium for a nail sticker and, more specifically, to a recording medium in which an ink receiving layer is formed on a substrate made of a polyurethane material to print a nail sticker by using a sublimation printer. According to the present invention, the recording medium for a nail sticker comprises: release paper; an adhesive layer formed on the release paper; an opaque substrate made of a polyurethane material, wherein the opaque substrate is attached to the adhesive layer; and an ink receiving layer formed on the substrate. Solvent resistance is enhanced between the substrate and the ink receiving layer when the ink receiving layer is coated so as to form an undercoating layer.

Description

Recording medium for nail sticker{MIDIA FOR NAIL STICKER}

The present invention relates to a recording medium for a nail sticker, and more particularly, to a recording medium capable of printing a nail sticker using a sublimation type printer since an ink receiving layer is formed on a polyurethane material.

In general, nail art refers to the beautiful expression of nails or toenails, and it is a comprehensive concept that means applying an artistic expression to the nails from simply painting a manicure. Drawing on long nails, attaching beads, jewelry, etc. It is representative.

In recent years, the domestic beauty and nail art industry is showing rapid growth, and in the beauty market, which is estimated to be about 4 trillion won, the size of the nail art industry is estimated to be about 1 trillion won, and the scale is continuing to expand for the time being. It is expected to be seen.

In addition, among the decorative materials used in nail art, there is a “nail sticker” that can be used conveniently. These nail stickers are made in the form of printing a design on one side and applying an adhesive on the other side. It is a product that attaches to create a cosmetic effect.

1 illustrates a typical nail sticker, and referring to this, the nail sticker includes a base layer 11, an adhesive layer 12 formed by being applied to the bottom of the base layer 11, and the adhesive layer ( 12) and a decorative layer 14 formed by silkscreen printing on the upper surface of the above-described base layer 11 with a release paper 13 attached to the bottom surface so as to be detachable, and a glitter mix in which epoxy and glitter are mixed. . Since the base layer has to be attached to a curved nail or the like, a material having elasticity and flexibility is used.

Meanwhile, among printers that form an image, there is a thermal transfer printer in which heat is applied to a thermal transfer ribbon coated with a dye so that the dye on the thermal transfer ribbon is transferred and fixed onto a recording medium.

The thermal transfer printer is a sublimation thermal transfer method in which the dye is sublimated and transferred according to the thermal transfer method of the dye, and a melt-type thermal transfer method in which the dye or pigment layer is transferred while being melted by a thermal recording head. It is divided into.

In addition to inkjet printing, such thermal transfer printers are an important means of photo printers, and their use areas are becoming more common, including manufacturing identification cards and printing images electrically expressed from cameras through printers.

Such thermal transfer printers, in particular, sublimation printers, have a small size and are suitable for personal use or portable use.

Therefore, it is not impossible for a user to produce a nail sticker at home according to personal preferences using a sublimation printer. However, in order to produce a nail sticker using a sublimation printer, it is necessary to develop a dedicated recording medium.

Sublimation printers mainly use photo paper or sticker paper as a recording medium. Photo paper includes an ink-receiving layer having good compatibility with sublimation dyes on the substrate, and in the case of sticker paper, an adhesive layer is further included on the opposite side of the substrate. Void PET or PP synthetic paper is used as the substrate used at this time, which has a lot of influence on the printing aptitude depending on the substrate, so there are restrictions on the material to be used.

In the sublimation printer's printing method, in order, Y(yellow)→M(magenta)→C(cyan)→O(Overlay) is transferred or coated on the recording medium. If the reciprocating transfer is performed and there is not too much stiffness of the recording medium, a feeding error occurs at the beginning or during the reciprocation. In the case of photo paper or sticker paper, a plastic film such as PET or PP, which has rigidity, is basically used, so there is no feeding problem during printing.

However, since the substrate is void PET or PP synthetic paper, it is difficult to apply as a recording medium for gel nail stickers that must be adhered to curved nails because it is not elastic and flexible.

Patent Publication 10-2007-0062825 Patent Publication 10-2016-0011658 Patent Publication 10-2017-0018649 Registered Patent 10-1413858

The present invention has been conceived to solve the above problems, and an object of the present invention is to provide a recording medium capable of printing a nail sticker using a sublimation type printer since an ink receiving layer is formed on a substrate made of polyurethane. .

Another object of the present invention is to provide a recording medium capable of smoothly transporting an ink receiving layer formed on a substrate made of a flexible material such as polyurethane when transporting a recording medium in a sublimation printer without being deformed.

In order to solve the above technical problem, in the recording medium for nail sticker according to the present invention, in the recording medium conveyed by a feed roller having protrusions formed on both sides and a pressure roller provided opposite to the feed roller, the protrusion from both sides A release paper for passing through and transferring at an accurate pitch according to the rotation of the feed roller; An adhesive layer formed on the release paper; A base material made of polyurethane attached to the adhesive layer; And an ink receiving layer formed on the substrate, wherein the release paper includes a transfer portion on both sides of which the protrusion penetrates through the adhesive layer, the substrate, and the ink receiving layer.

In addition, it is preferable that the release paper is made of polyester.

In addition, the thickness of the release paper is preferably 75 ~ 125㎛.

In addition, the white layer is preferably formed of a titanium oxide material as a pigment.

In addition, it is preferable that the ink receiving layer has a thickness of 15 μm or more.

In addition, the ink receiving layer is selected from the group consisting of polyester resin, polyacrylate resin, polyvinyl acetate resin, polycarbonate resin, polyurethane resin, polyamide resin, polyvinyl chloride resin, and vinyl chloride-vinyl acetate copolymer. It is preferably formed of any one of the resins.

In addition, it is preferable that the ink receiving layer further includes polyethylene wax or silicone oil to improve releasability during transfer.

In addition, it is preferable that the ink receiving layer further includes a surfactant for dispersing the resin and polyethylene wax or silicone oil.

In addition, it is preferable that the thickness of the substrate is 50 μm or more.

In addition, it is preferable that the thickness of the ink receiving layer/thickness of the substrate is greater than 0.15.

In addition, the thickness of the ink receiving layer/thickness of the substrate is preferably greater than 0.15, and the thickness of the ink receiving layer increases as the thickness of the substrate increases.

In addition, it is preferable that an undercoat layer is formed between the substrate and the ink receiving layer to enhance solvent resistance when coating the ink receiving layer.

In addition, the undercoat layer is preferably formed of any one of polyester, acrylic polymer, and polyurethane.

In addition, it is preferable that a back coating layer is further formed on the back surface of the release paper.

In addition, the back coating layer is preferably formed of a polyurethane or acrylic material.

In addition, it is preferable that the back coating layer further includes a pigment.

In addition, the thickness of the back coat layer is preferably 2 ~ 3㎛.

In addition, it is preferable that the substrate is formed transparently, and a white layer formed between the adhesive layer and the substrate is further formed.

In addition, the white layer is preferably formed of a titanium oxide material as a pigment.

According to the present invention, since an ink receiving layer is formed on a substrate made of polyurethane, it is possible to provide a recording medium capable of printing a nail sticker using a sublimation printer.

Since the substrate is provided on both sides of the release paper with no ink-receiving layer attached, there is an effect that the elastic ink-receiving layer is not deformed and can be transferred flatly when the recording medium is transferred in the sublimation printer.

1 shows a conventional nail sticker.
2 and 3 show an embodiment according to the present invention.
Figure 4 shows the transfer state of the embodiment according to the present invention in the sublimation type printer.
5 shows that a sticker for nails and a sticker for toenails are formed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a cross-sectional view taken along line A-A of FIG. 3, and FIG. 3 is a perspective view showing an embodiment according to the present invention. Referring to this, the embodiment 100 of the recording medium according to the present invention includes a release paper 110, an adhesive layer 120, a substrate 130, and an ink receiving layer 140.

The release paper is detachably attached to the adhesive layer, and when using a nail sticker, the user separates the release paper from the adhesive layer and then attaches the base material to the nail or toenail using the adhesive force of the adhesive layer.

The release paper 110 is mainly made of polyester, and is formed to have a thickness of 75 to 125 μm.

When the thickness of the release paper 110 is less than 75 μm, there is a problem that the feed roller is contaminated by the adhesive layer during printing, and when it exceeds 125 μm, the total weight increases to reduce the difficulty in feeding the printer. In addition, there is a problem of rising costs.

The adhesive layer 120 is formed on the back surface of the substrate, and attaches the substrate 130 separated from the release paper 110 to a nail or toenail.

The substrate 130 is a component corresponding to the parent body of the nail sticker, and is formed of a polyurethane material in this embodiment.

Since the substrate 130 is formed of a polyurethane material, it has elasticity and flexibility, so that it can be attached to a curved nail or toenail.

In particular, the polyurethane material substrate 130 has a thickness of 50 to 200 μm.

If the thickness of the substrate 130 is less than 50 μm, there is a problem such as inconvenient and easy sagging when handling by the user, and if it exceeds 200 μm, the step difference becomes too large, which not only impairs feeding of the printer, but also costs There is a problem with rising.

The ink receiving layer 140 is preferably made of a material having good affinity with the dye transferred from the thermal transfer ribbon, diffusion of the dye well during the transfer process, and good preservation for the dye after transfer.

These materials include polyester resins, polyacrylate resins, polyvinyl acetate resins, polycarbonate resins, polyurethane resins, polyamide resins, polyvinyl chloride resins, vinyl chloride-vinyl acetate copolymers, and other highly polarized resins. And resins having bonds.

In addition to these resins, the ink-receiving layer 140 may be added with polyethylene wax or silicone oil to improve releasability during transfer, and a surfactant may also be used for dispersion thereof.

Titanium dioxide, calcium carbonate, clay, zinc oxide, etc. may be added to improve the whiteness of the recording medium 100, and a fluorescent dye may be added to impart fluorescence. In addition, antioxidants or ultraviolet absorbers may be introduced in order to increase weather resistance.

The ink receiving layer 140 may be formed by coating a coating solution containing a resin, an additive, and, if necessary, an inorganic material, followed by drying.

The thickness of the ink receiving layer 140 is preferably 15 μm to 30 μm, and the “thickness of the ink receiving layer/thickness of the substrate” is preferably greater than 0.15.

In addition, the thickness of the ink receiving layer/thickness of the substrate is preferably greater than 0.15, and the thickness of the ink receiving layer increases as the thickness of the substrate increases.

In the case of using the polyurethane substrate 130, if the thickness of the ink receiving layer is less than 15 μm, it is impossible to satisfy sublimation printing aptitude.

The reason why synthetic paper made of void PET or PP material is used as the substrate of the sublimation printer is that the substrate itself has rigidity and a certain degree of cushioning feeling. Due to the characteristics of the sublimation printer, the ribbon and the recording medium meet at one point during printing and are subjected to pressure to adhere to each other between the head and the platen roller. At this time, if the substrate of the recording medium is too rigid without cushioning, the adhesion between the ribbon and the recording medium decreases. The transfer proceeds poorly, resulting in a decrease in printability such as a decrease in optical density (OD).

On the contrary, if the base material has too good elasticity and flexibility like polyurethane, it does not receive adequate pressure, resulting in insufficient dye transfer and a problem in reciprocating feeding.

In order to solve this problem, the portion of the ink-receiving layer that comes into contact with the ribbon should be treated thicker than the existing 5㎛ to compensate for the portion deteriorated by the polyurethane substrate. As a result of conducting several experiments, it was found that the above problem can be solved with an ink-receiving layer of 15 μm or more, and it was also found that the thickness of the polyurethane substrate was affected. As mentioned earlier, the binders used in the ink receiving layer are mainly rigid polymers, so it could be supplemented only by adjusting the thickness.

As a solvent for the coating agent of the ink receiving layer 140, alcohol, glycol ether, ketone, toluene, dimethylformaldehyde, ethyl acetate, etc. may be used in consideration of solubility and workability. In the present invention, ketone, toluene, dimethylformaldehyde, and the like are preferred.

An undercoat layer 150 is further formed between the substrate 130 and the ink receiving layer 140. This is to enhance solvent resistance when coating the ink receiving layer 140.

In the prior art, the substrate is formed of PET or PP, and such a substrate has a certain degree of solvent resistance to solvents such as toluene or MEK (Methyl Ethyl Ketone) of the ink receiving layer, so that it is hardly affected when coating the ink receiving layer.

However, in the case of polyurethane, which is the substrate of the present invention, depending on the type, it is easily soluble in toluene or MEK, so when the ink receiving layer is coated, the substrate melts or swelling occurs due to the solvent of the ink receiving layer, causing the entire crying phenomenon. do. To prevent this, it is possible to solve this problem by using a solvent-resistant polyurethane or by placing an undercoat layer under the ink receiving layer. The use of solvent-resistant polyurethane has advantages and disadvantages of each other, such as limiting the selection of polyurethane and introducing an undercoat layer incurs an increase in cost.

By coating the undercoating layer 140 with a coating solution containing a high-gloss resin, a recording medium having excellent gloss can be manufactured regardless of the material of the substrate 130. The coating liquid used for the undercoat layer 140 contains a sunscreen agent, an antioxidant, and the like to improve the vulnerability of the substrate to light, thereby increasing the light resistance of the recording medium.

In general, a whitening agent or dye may be added to the ink receiving layer 140 in order to increase the whiteness of the recording medium. These become a factor causing yellowing of printed and non-printed parts in a long-term perspective.

By adding such a whitening agent or dye to the undercoat layer 140 rather than the ink receiving layer, it is possible to reduce the effect on the external environment, thereby improving light resistance.

Resins that can be used for the undercoat layer 140 are polyol-based resins, polyurethane-based resins, acrylic resins, vinyl resins, and the like, and a curing agent such as polyisocyanate-based or aziridine-based resin is usually used together. These can be used not only for polyurethane, but also for polyolefin-based films such as polypropylene and polyethylene, and polyethylene terephthalate films. Any coating method can be applied to the undercoat layer, for example, a bar or a gravure coating method is generally used.

It is preferable that the undercoat layer 140 has a thickness of 3 μm to 5 μm.

When the thickness of the undercoat layer 140 is less than 3 μm, there is a problem that sufficient solvent resistance cannot be seen. When it exceeds 5 μm, the overall thickness increases and the cost increases.

In addition, when the urethane substrate 130 is transparent, it is preferable to form a white layer 160 between the adhesive layer 120 and the substrate 130.

Of course, when the base 130 is opaque, for example, when the base 130 is white polyurethane, the white layer 160 is unnecessary.

It is preferable that the thickness of the white layer 160 is 5 μm or less.

In addition, a back coating layer 170 is formed on the back surface of the release paper 110. The back coating layer 170 is for separability and aesthetic appearance during printing between recording media, and may be treated with a matte, an antistatic agent, and imparting releasability, and printing of a company logo may be additionally performed.

The back coating layer 170 is formed of a polyurethane or acrylic material, and a pigment such as silica may be added as necessary. It is preferable that the thickness is 2 µm to 3 µm.

When the thickness of the back coating layer 170 is less than 2 μm, there is a problem that separation between recording media is not smooth, and when it exceeds 3 μm, the overall thickness increases and the cost increases.

Hereinafter, it will be described in detail through examples according to the present invention. However, the present invention is not limited by the following examples.

Examples and Comparative Examples

On the other side of the base material, the adhesive layer composition shown in [Table 1] is bakered on the other side of the polyurethane (trade name: DSAL series, Korea 2&2 Chemical) laminated with a 50㎛ transparent polyethylene terephthalate (PET) protective film on one side. After drying with an applicator, apply it to a thickness of ~40㎛ to form the adhesive layer of the recording medium for nail sticker, and then peel off the 50㎛ protective film and remove the ~105㎛ release PET with antistatic agent and matt back coating. The release paper was laminated toward the adhesive layer. On one side of the polyurethane substrate of the thus prepared recording medium, the undercoat layer composition shown in the following [Table 2] was applied to a thickness of ~4㎛ after drying using a bar coater, and then the ink receiving layer shown in [Table 3] again. The composition was dried using a bar coater and then applied in various thicknesses to complete the final nail sticker recording medium.

Adhesive layer composition division compound Input amount (parts by weight) solute 2-ethylhexyl acrylate 46.5 Acrylic acid 3.3 2,2-azobisisobutylonitrile 0.2 menstruum Ethyl acetate 50

Note) Solute compound: Japanese pure chemical

Undercoat layer composition division compound Input amount (parts by weight) solute Water-dispersible polyurethane (32%) ¹⁾ 30.9 Aziridine crosslinking agent ²⁾ 0.1 Silicone additive (surfactant) ³⁾ One menstruum water 68

Note) 1) Water-dispersible polyurethane: Handok Industries, HU-SM100

2) Arijirin crosslinking agent: BF Chemtech, CL-467

3) Silicone additive: BWK Korea, BYK-348

Ink-receiving layer composition division compound Input amount (parts by weight) solute Vinyl chloride-vinyl acetate copolymer ¹⁾ 19 Amino-modified silicone oil ²⁾ 0.02 Epoxy modified silicone oil ³⁾ 0.02 Fluorine surfactant ⁴⁾ 0.06 menstruum Methyl ethyl ketone 40 toluene 40

Note) 1) Vinyl chloride-vinyl acetate copolymer: Hanwha Chemical, CP-430

2) Amino-modified silicone oil: Shinwol Chemical, KF-393, Japan

3) Epoxy-modified silicone oil: Shinwol Chemical, X-22-343, Japan

4) Fluorine surfactant: US 3M, FC-4430

[Table 4] shows examples and comparative examples according to the thickness of the polyurethane and the thickness of the ink receiving layer.

Recording medium for nail sticker (unit: ㎛) Floor classification Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Polyurethane base 200 120 50 220 40 120 60 Ink receiving layer 30 20 15 35 15 15 10

Experimental method: Evaluation of the characteristics of recording media for nail stickers

The recording media for nail stickers prepared in Examples (1 to 3) and Comparative Examples (1 to 4) were imaged using a thermal transfer photo printer (PC389P) manufactured by LG Electronics, Korea. At this time, the wrinkles and spots of the image, the feeding quality (round trip), and the optical density (OD) were evaluated, and the results are summarized in Table 5 below.

In Table 5 below, the optical density was measured with a SpectroEye measuring instrument manufactured by X-rite in the United States after printing a magenta and black image of 1 cm X 1 cm.

In addition, the evaluation of wrinkles and unevenness in the printed image was performed by visually checking whether there were wrinkles or unevenness in the image when printing the image, and comparing the sizes with each other. As a result, when there are no wrinkles or spots, "○", when the size is 0.3cm or less, is represented by "△", and when the size is 0.3cm or more, it is represented by "x".

In addition, the evaluation of the feeding quality is similar to that when printing images, print in the order of Y (yellow) → M (magenta) → C (cyan) → O (Overlay), stopping at the beginning or in the middle, or film in the last O order. It was checked visually whether or not a paper feeding error such as sticking occurred, and the degree was compared. As a result, "○" when there is no paper feed error, "△" when a paper feed error occurs in 1 out of 3 sheets or a problem occurs in the last O sequence, and "x" for a severe case where a feeding error almost always occurs. Represented by.

division Wrinkles/stains Paper feed quality magenta black Remark Example 1 ○ ○ 1.77 1.85 Chapter 3 Average Example 2 ○ ○ 1.78 1.83 Chapter 3 Average Example 3 ○ ○ 1.75 1.83 Chapter 3 Average Comparative Example 1 X X - - Print 1 Y only Comparative Example 2 ○ ○ 1.76 1.84 Chapter 3 Average Comparative Example 3 ○ ○ 1.58 1.61 Chapter 3 Average Comparative Example 4 △ △ 1.36 1.42 Average of 2 sheets (Chapter 1 O Failure)

From the results of Table 5 above, in all cases, the'wrinkle/stain' and'feed quality' problems occurred only in Comparative Examples 1 and 4. In the case of Comparative Example 1, the total thickness of the recording medium was more than 400 μm, which was too thick even if the printer was mechanically modified, so that feeding was not properly performed. As a result, one out of three sheets were Y-printed, but at that time, it was also seen that wrinkles and stains were largely generated as the ink-receiving layer/polyurethane substrate was pushed. There is also a cost aspect, but if the recording medium is too thick, it seems that it is not easy to match it mechanically. In the case of Comparative Example 4, the value of the "thickness of the ink receiving layer/thickness of the substrate" is 0.17, which is greater than 0.15, but the thickness of the ink receiving layer is 10 μm, which is less than 15 μm.

As mentioned earlier, the introduction of polyurethane, which has good elasticity and flexibility, has a great influence on the feeding quality. If the ink receiving layer is thick enough (15㎛ or more), it can be seen that it compensates for the disadvantages of polyurethane. In Comparative Example 4, since the ink receiving layer was not sufficiently thick, a problem occurred in the paper feed quality, and accordingly, a wrinkle/stain problem was also caused.

In the case of Comparative Example 3, the thickness of the polyurethane is also 50 μm or more and the thickness of the ink receiving layer is 15 μm or more, but the value of “thickness of the ink receiving layer/thickness of the substrate” is 0.125, which is less than 0.15.

Since the thickness of the ink receiving layer is 15㎛ or more, it has been shown that there are no'wrinkles/stains' and'feeding quality' problems. However, in order to satisfy the optical density, it must be thickened to some extent depending on the thickness of the polyurethane substrate.

Although the light density of magenta and black is higher than that of Comparative Example 4 in which the ink-receiving layer is 10 µm, it can be seen that the optical density is decreased by ~10% compared to the Example. In the case of Comparative Example 2, there are no problems with wrinkles/stains, paper feed quality, and light density during printing.

However, when removing the sticker from the printed recording medium to attach to the actual nails or toenails after printing, the polyurethane part is too thin, so it is a little inconvenient to remove it from the release paper and, above all, it tends to stretch easily, causing deformation of the printed image. Discomfort occurs even when attaching to nails. This indicates that the polyurethane thickness should have a certain thickness (50㎛ or more) in consideration of the fact that it is a sticker for nail art.

division Example 1 Example 2 Example 3 Comparative Example 1 Comparative Example 2 Comparative Example 3 Comparative Example 4 Usability No problem No problem No problem - weeping No problem -

3 and 4, in the recording medium 100 according to the present invention, the substrate 130 and the ink-receiving layer 140 are removed from both ends of the release paper 110 to expose the surface of the release paper 110. It can be seen that the transfer part 111 is formed.

The release paper 110 is a component for conveying the protrusion 211 of the feed roller 210 at a correct pitch through penetration.

That is, the substrate 130 has an area smaller than that of the release paper 110. Therefore, both sides of the release paper 110 are exposed to form the transfer part 111.

As described above, in the printing method of a sublimation printer, Y(yellow)→M(magenta)→C(cyan)→O(Overlay) is transferred or coated on the recording medium in order. During this process, the recording medium is transferred back and forth in the printer. It must be transported back and forth four or more times. Accordingly, the sublimation type printer is provided with a pressure roller 220 at an upper portion and a feed roller 210 at a lower portion with a recording medium interposed therebetween.

The feed roller 210 is formed with a plurality of protrusions 211 penetrating the release paper 110, and the pressure roller 220 is formed with a stepped portion 222 in close contact with the transfer unit 111.

In the portion where the protrusion 211 penetrates, there is no base 130 made of polyurethane, so the substrate 130 made of an elastic material is not distorted by the pressure through which the protrusion 211 penetrates. In particular, since the step portion 222 is in close contact with the transfer portion 111, it does not affect the substrate 130 located inside the step portion 222, so that the substrate 130 can be kept flat. .

It is preferable that the width of the stepped portion 222 is equal to or greater than the width of the conveying portion 111.

Referring to FIG. 5, in the embodiment according to the present invention, a cut line is formed on the release paper 110 so that the nail sticker S1 and the toenail sticker S2 can be easily separated.

100: recording medium (Example)
110: release paper
120: adhesive layer
130: substrate
140: ink receiving layer
150: undercoat layer
160: white layer
170: back coating

Claims (19)

In the recording medium conveyed by a feed roller having protrusions formed on both sides and a pressure roller provided opposite to the feed roller,
Release paper for conveying the protrusions through the protrusions from both sides at an accurate pitch according to the rotation of the feed roller;
An adhesive layer formed on the release paper;
A substrate made of polyurethane attached to the adhesive layer; And
Includes; an ink receiving layer formed on the substrate,
The release paper is a recording medium for nail sticker, characterized in that at both sides of the protrusion pierces, the adhesive layer, the substrate and the ink receiving layer is not formed a conveying part.
The method of claim 1,
The recording medium for nail sticker, characterized in that the release paper is made of polyester.
The method of claim 2,
The recording medium for nail sticker, characterized in that the thickness of the release paper is 75 ~ 125㎛.
The method of claim 1,
The white layer is a recording medium for nail sticker, characterized in that formed of a titanium oxide material as a pigment.
The method of claim 1,
The ink receiving layer is a recording medium for nail sticker, characterized in that the thickness of 15㎛ or more.
The method of claim 1,
The ink receiving layer is any selected from the group consisting of a polyester resin, a polyacrylate resin, a polyvinyl acetate resin, a polycarbonate resin, a polyurethane resin, a polyamide resin, a polyvinyl chloride resin and a vinyl chloride-vinyl acetate copolymer. A recording medium for nail sticker, characterized in that formed of a single resin.
The method of claim 6,
The ink-receiving layer is a recording medium for nail sticker, characterized in that it further comprises polyethylene wax or silicone oil to improve releasability during transfer.
The method of claim 7,
The ink receiving layer further comprises a surfactant for dispersing the resin and polyethylene wax or silicone oil.
The method of claim 1,
The recording medium for nail sticker, characterized in that the thickness of the substrate is 50 μm or more.
The method of claim 1,
The recording medium for nail sticker, characterized in that the thickness of the ink receiving layer/thickness of the substrate is greater than 0.15.
The method of claim 10,
The thickness of the ink receiving layer/thickness of the substrate is greater than 0.15, and the thickness of the ink receiving layer increases as the thickness of the substrate increases.
The method of claim 1,
A recording medium for nail sticker, characterized in that an undercoat layer is formed between the substrate and the ink receiving layer to enhance solvent resistance when the ink receiving layer is coated.
The method of claim 12,
The undercoat layer is a recording medium for nail sticker, characterized in that formed of any one of polyester, acrylic polymer, and polyurethane.
The method of claim 1,
A recording medium for nail sticker, characterized in that a back coating layer is further formed on the back surface of the release paper.
The method of claim 14,
The back coating layer is a recording medium for nail sticker, characterized in that formed of a polyurethane or acrylic material.
The method of claim 15,
The recording medium for nail sticker, characterized in that the back coating layer further includes a pigment.
The method of claim 14,
The recording medium for nail sticker, characterized in that the thickness of the back coati layer is 2 ~ 3㎛.
The method of claim 1,
The substrate is formed transparently,
A recording medium for nail sticker, characterized in that a white layer formed between the adhesive layer and the substrate is further formed.
The method of claim 18,
The white layer is a recording medium for nail sticker, characterized in that formed of a titanium oxide material as a pigment.

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