Nail sticker for coating uv gel layer and application method thereof

Abstract

The present disclosure relates to a nail sticker including a UV gel layer and a method for preparing same. In accordance with the embodiments of the present disclosure, the need of soaking a nail in a harmful solution for a long time for removal of a UV gel may be avoided while maintaining the advantages of the UV gel. Also, the problems that the opposite end of the cuticle is chipped or the end of the cuticle is peeled may be solved while maintaining the advantages of the UV gel.

What is claimed is: 
     
         1 . A nail sticker for coating a UV gel layer, wherein a top surface of the nail sticker is embossed. 
     
     
         2 . The nail sticker for coating a UV gel layer according to  claim 1 , wherein said embossing is performed by passing the nail sticker for coating a UV gel layer between a first roll and a second roll and an embossing pattern is formed on at least one of the first roll and the second roll. 
     
     
         3 . The nail sticker for coating a UV gel layer according to  claim 1 , wherein the nail sticker for coating a UV gel layer has a surface roughness of 5a≦R a ≦10a and 10z≦R z ≦100z as a result of said embossing. 
     
     
         4 . A nail sticker for coating a UV gel layer, which has a print layer formed on a top surface of the nail sticker. 
     
     
         5 . The nail sticker for coating a UV gel layer according to  claim 4 , wherein the print layer is formed by a method selected from silk-screen printing, gravure printing and offset printing and the print layer is formed on a base primer layer formed on a top surface of the nail sticker for coating a UV gel layer. 
     
     
         6 . The nail sticker for coating a UV gel layer according to  claim 4 , wherein the nail sticker for coating a UV gel layer has a surface roughness of 5a≦R a ≦10a and 10z≦R z ≦100z. 
     
     
         7 . A nail sticker for coating a UV gel layer, which has a UV-cured coating layer formed on a top surface of the nail sticker. 
     
     
         8 . The nail sticker for coating a UV gel layer according to  claim 7 , wherein the UV-cured coating layer is formed by coating a composition for forming a UV-cured coating layer comprising a UV-curable oligomer and a UV initiator on the nail sticker for coating a UV gel layer and irradiating UV. 
     
     
         9 . The nail sticker for coating a UV gel layer according to  claim 8 , wherein the composition for forming a UV-cured coating layer further comprises a multifunctional monomer. 
     
     
         10 . The nail sticker for coating a UV gel layer according to  claim 8 , wherein the UV-curable oligomer is an oligomer with both ends substituted with UV-curable functional groups, the UV-curable functional group being selected from an acrylate group and a vinyl group, the oligomer is selected from a urethane oligomer, an acrylate oligomer, an olefin oligomer and a vinyl alcohol oligomer, and the oligomer has a degree of polymerization of 10-100. 
     
     
         11 . The nail sticker for coating a UV gel layer according to  claim 8 , wherein part of the UV-curable functional groups included in the UV-cured coating layer remain unreacted after UV curing and the content of the unreacted UV-curable functional groups is 3-5% of the UV-curable functional groups included in the composition for forming a UV-cured coating layer. 
     
     
         12 . A nail sticker for coating a UV gel layer, which has a top primer layer formed on a top surface of the nail sticker. 
     
     
         13 . The nail sticker for coating a UV gel layer according to  claim 12 , wherein the top primer layer is formed by coating a composition for forming a top primer layer comprising a polymer for forming a top primer layer, a solvent and an additive on the nail sticker and evaporating the solvent partly or completely. 
     
     
         14 . The nail sticker for coating a UV gel layer according to  claim 13 , wherein the polymer for forming a top primer layer is selected from polyurethane, polyacrylate, polyolefin, polyvinyl alcohol and polyvinyl chloride, the composition for forming a top primer layer has a surface tension measured by the dyne pen method of 28-72 dyne/cm, and the top primer layer has a curing index measured as modulus after allowing to stand at 75° C. for 72 hours of 5-25 MPa. 
     
     
         15 . The nail sticker for coating a UV gel layer according to  claim 13 , wherein the composition for forming a top primer layer further comprises a UV-curable oligomer with both ends substituted with UV-curable functional groups and the content of the UV-curable oligomer is 1-3% of the polymer for forming a top primer layer and 3-5% of the UV-curable functional groups included in the composition for forming a UV-cured coating layer. 
     
     
         16 . A nail sticker for coating a UV gel layer, which has a laminated film layer attached on a top surface of the nail sticker. 
     
     
         17 . The nail sticker for coating a UV gel layer according to  claim 16 , wherein the laminated film layer has a tensile strength measured according to ASTM D638 of 5-200 MPa, an elongation measured according to ASTM D638 of 10-500%, a modulus in the elongation range of 0-10% measured according to ASTM D638 of 3-70 MPa, a surface tension measured by the dyne pen method of 28-72 dyne/cm, a curing index measured as modulus after allowing to stand at 75° C. for 72 hours of 10-50 MPa, a thickness measured by the dual gauge method of 2-50 μm, and a print adhesion measured according to the cross-cut tape test of ASTM D3359-02 of 2B or greater. 
     
     
         18 . A UV gel layer-coated nail sticker, which has a UV gel layer formed on a nail sticker. 
     
     
         19 . The UV gel layer-coated nail sticker according to  claim 18 , wherein the nail sticker is the nail sticker for coating a UV gel layer according to any one of  claims 1  to  15 . 
     
     
         20 . A nail sticker kit for coating a UV gel layer comprising a nail sticker and a composition for forming a UV-cured coating layer. 
     
     
         21 . The nail sticker kit for coating a UV gel layer according to  claim 20 , wherein the nail sticker is the nail sticker for coating a UV gel layer according to any one of  claims 1  to  15 . 
     
     
         22 . The nail sticker kit for coating a UV gel layer according to  claim 20 , wherein the composition for forming a UV-cured coating layer comprises a composition for forming a UV base gel layer and a composition for forming a UV top gel layer. 
     
     
         23 . The nail sticker kit for coating a UV gel layer according to  claim 20 , wherein the nail sticker kit for coating a UV gel layer further comprises a UV light source providing means. 
     
     
         24 . The nail sticker kit for coating a UV gel layer according to  claim 20 , wherein the nail sticker kit for coating a UV gel layer further comprises a coating aiding means for coating the composition for forming a UV top gel layer. 
     
     
         25 . A nail care method using a UV gel layer-coated nail sticker, comprising:
 attaching a nail sticker on a natural nail;   coating a composition for forming a UV base gel layer on the nail sticker;   forming a UV base gel layer by exposing the coated composition for forming a UV base gel layer to UV light;   coating a composition for forming a UV top gel layer on the UV base gel layer; and   forming a UV top gel layer by exposing the coated composition for forming a UV top gel layer to UV light.   
     
     
         26 . The nail care method using a UV gel layer-coated nail sticker according to  claim 26 , wherein the nail sticker is the nail sticker for coating a UV gel layer according to  claim 1 .