Artificial nail

Abstract

Disclosed is an artificial nail. The artificial nail according to an embodiment of the present disclosure includes a nail body, a design layer attached to an upper surface of the nail body, and a 3-dimensional coating layer of an upwardly convex transparent dome shape on the design layer.

What is claimed is: 
     
         1 . An artificial nail, comprising:
 a nail body having a 3-dimensional (3D) curved surface shape, the nail body having an attachment region on an upper surface, wherein the attachment region is formed in a straight line shape in a lengthwise direction and a curve shape in a widthwise direction; and   a design layer of a flat shape attached to the attachment region.   
     
     
         2 . The artificial nail according to  claim 1 , wherein a lower surface of the nail body has a radius of curvature corresponding to a shape of a fingernail or a toenail, and
 a widthwise radius of curvature of the attachment region is larger than a widthwise radius of curvature of the lower surface of the nail body.   
     
     
         3 . The artificial nail according to  claim 2 , wherein a ratio of the widthwise radius of curvature of the attachment region to the widthwise radius of curvature of the lower surface of the nail body is 1.05 to 4.0. 
     
     
         4 . The artificial nail according to  claim 1 , wherein a ratio of a length of the attachment region to a length of the nail body is 0.4 to 0.8, and
 a ratio of a width of the attachment region to a width of the nail body is 0.45 to 0.8.   
     
     
         5 . The artificial nail according to  claim 1 , wherein a ratio of a length of the attachment region to a length of the nail body is 0.4 to 0.8, and a ratio of a width of the attachment region to a width of the nail body is 0.45 to 0.8, so that a flexural modulus of the nail body is 1 to 20 MPa with the design layer attached to the attachment region, and the nail body has a curved surface shape with a continuously increasing thickness in a direction from a widthwise end to a center, wherein the thickness of the nail body at an edge position of the attachment region is 0.1 to 1.7 mm, and the thickness of the nail body at an intermediate position on the upper surface of the nail body between the widthwise edge position of the nail body and the edge position of the attachment region is 0.1 to 0.5 mm. 
     
     
         6 . The artificial nail according to  claim 1 , further comprising:
 a 3D coating layer having an upwardly convex transparent dome shape on the design layer.   
     
     
         7 . The artificial nail according to  claim 6 , wherein a thickness at a center of the 3D coating layer is 300 to 2000 um, and
 the thickness of the 3D coating layer decreases from center to edge.   
     
     
         8 . The artificial nail according to  claim 6 , further comprising:
 a first protection coating layer on the 3D coating layer, wherein the first protection coating layer makes smooth connection between the 3D coating layer and the nail body, and covers the entire upper surface of the nail body to protect the 3D coating layer,   wherein an area of the 3D coating layer is equal to or smaller than an area of the design layer.   
     
     
         9 . The artificial nail according to  claim 8 , wherein a thickness of the first protection coating layer is 20 to 400 um. 
     
     
         10 . The artificial nail according to  claim 8 , further comprising:
 a multilayer coating layer on the first protection coating layer, wherein the multilayer coating layer covers the first protection coating layer and has various changes in color or pattern depending on a viewing direction; and   a second protection coating layer on the multilayer coating layer, wherein the second protection coating layer covers the multilayer coating layer to protect the multilayer coating layer.   
     
     
         11 . The artificial nail according to  claim 1 , wherein the design layer includes a dichroic film and a holographic film having a change in color or pattern depending on a viewing direction.