More particularly, the invention relates to a plastic nail file which is made by forming pattern layers by transferring them on both sides of the stick shaped plastic plate comprising materials such as PC (polycarbonate), PE, PP, acetals and so forth, and by forming adhesive layers by applying transparent or translucent adhesives on the pattern layers on both sides by the screen printing method, and then by applying and attaching the transparent abrasive grains having relatively different grain sizes on the adhesive layers by the screen printing method, so that, as a result, the appearance of the nail file may be decorated with the pattern layers more in styleless and elegant, and the grinding and trimming of nail may be performed simultaneously by using only one nail file because on one side thereof, large abrasive grains are applied to obtain rough grind effect and on the other side thereof, relatively small sized grains are applied to obtain soft puffing effect by making the abrasive grain sizes on both sides of the file be different each other.

2. Description of the Prior Art Generally, the nail file is the cosmetic tool which is commonly used by women for trimming their fingernails and toenails. It has been produced by

attaching abrasive stone powder to the plate surface made up of the thin foil shaped metal piece or injection molding plastics. And, in the nail file of the former metal piece, when it is formed on one end of the thin metal piece, the grip portion is formed by so-called, core method, which is the method for an operator to put the grip portion separately in the grip mold for injection molding.

Therefore, the sufficient work efficiency may not be obtained, so that the production cost gets to be increased. And, since when the completion of the production, the color of common steel is exposed intactly and is monotonous, the appearance is not elegant so that the product value may be lowered.

And, when the nail file is injection molded by the latter plastic plate, it is proposed that the adhesive is generally applied and attached on only one surface of the plastic plate and the abrasive grains are spread thereon, and then the pattern layer or printing layer is formed thereon. However, in this case, since the abrasive grains are applied on only one surface of the plastic plate, nails are grinded with single abrasive condition. When user may want different abrasive effects such as rough grind effect, soft puffing effect etc. , user has to prepare separate nail files each having different abrasive grains so that the inconvenience of use may be occurred. And since pattern layers are formed on the surface of abrasive grains by printing or painting, when abrasive grains are abraded by long term use, the pattern layer is also abraded so that the appearance of the nail file may be easily damaged. Thus, the life span of the file is short and the durability of appearance is weak so that the nail files have to be changed frequently. Even though the shape or color of an adhesive layer may be formed variously on the plastic plate by screen printing method, the abrasive grains are also applied and attached on the upper portion of the

adhesive layer. Thus, after the completion of the nail file, the color of an adhesive by screen printing is covered up by the abrasive grains so that the appearance of the surface is determined by the color of the abrasive grains.

As a result, there is a shortcoming that the decorating ability of the nail file is impaired. When the screen printing process of an adhesive proceeds, the remnant of an adhesive is stained on the grip portion so that the appearance of the product may be damaged. And other several problems on work are uncovered.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention is to solve the above mentioned problems and to provide a nail file which is made by forming pattern layers by transferring them on both sides of the stick shaped plastic plate comprising materials such as PC (polycarbonate), PE, PP, acetals and so forth, and by forming adhesive layers by applying transparent or translucent adhesives on the pattern layers on both sides by the screen printing method, and then by applying and attaching the transparent abrasive grains having relatively different grain sizes on the adhesive layers by the screen printing method. As a result, the splendid and various pattern shapes or colors of the pattern layers transferred outside of the surfaces permeates the transparent or translucent adhesive layers and the transparent grains so that the appearance of the nail file may be decorated more in styleless and elegant. Thus, if necessary, by transferring advertisement contents on the nail file, the invention may be used as the advertisement article so that it may be utilized with various purposes.

And, it is an other object of the invention to prevent the pattern layers from being damaged by an abrasion of the abrasive grains and to preserve the splendid and elegant shapes or colors of the pattern layers for a long time till its disuse, since the upper portion of the pattern layers transferred on both sides of the stick shaped plastic plate comprising materials such as PC (polycarbonate), PE, PP, acetals and so forth, is transparently shielded from the outside by transparent or translucent adhesives and transparent abrasive grains so that the pattern layers may be protected, And, li is further object of the invention to provide portable and multi- functioned nail file which the grinding and trimming of nail may be performed simultaneously by using only one nail file because on one side, large abrasive grains are applied to obtain rough grind effect and on the other side, relatively small sized grains are applied to obtain soft puffing effect by making the abrasive grain sizes on both sides of the file be different each other.

In order to accomplish such objects, the invention comprises: a stick shaped plastic plate made up of materials such as PC (polycarbonate), PE, PP, acetals and so forth; pattern layers transferred and formed on both sides of the plate ; adhesive layers formed by applying transparent or translucent adhesives on the surfaces of the pattern layers transferred on both sides by the screen printing method; and the transparent abrasive grain layers having relatively different grain sizes applied and attached on the upper portions of the adhesive layers by the screen printing method..

BRIEF DESCRIPTIONS OF THE DRAWINGS The preferred embodiments of the present invention will now be

described by way of example with reference to the accompanying drawings in which: Fig. 1 is a perspective view according to the present invention; Fig. 2 is a partly exploded and perspective view according to the present invention; Fig. 3 is a cross-sectional view illustrating the exploded state of the stacked construction according to the present invention; and Fig. 4 is a longitudinal and cross sectional view according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT Fig. 1 is a perspective view according to the present invention; Fig. 2 is a partly exploded and perspective view according to the present invention; Fig.

3 is a cross-sectional view illustrating the exploded state of the stacked construction according to the present invention; and Fig. 4 is a longitudinal and cross sectional view according to the present invention.

As illustrated in the drawings, the plastic nail file 10 is comprised of the stick shaped plate 1 made up of materials having superior heat-resisting property and high strength such as PE, PP as well as PC, acetals and so forth; pattern layers 2 and 3 each formed by transferring transfer films on both sides of the plate 1; adhesive layers 4 and 5 formed by applying transparent or translucent adhesives by the screen printing method on the surfaces of the pattern layers 2 and 3 transferred on both sides of the stick shaped plastic plate 1; and the transparent abrasive grain layers 6 and 7 having relatively different grain sizes applied and attached on the upper portions of the adhesive layers 4

and 5 by the screen printing method.

In such invention, the pattern layers 2 and 3 may be formed variously by forming the pattern layers 2 and 3 by transferring transfer papers (including both of heat transcription and water transcription) printed variously and splendidly on both sides of the stick shaped plastic plate 1 made up of materials such as PC, PE, PP, acetals etc. And, in the formation of adhesive layers 4 and 5 and abrasive grain layers 6 and 7 which are applied or spread on the pattern layers, since layers 4 and 5 and abrasive grain layers 6 and 7 are formed transparently using adhesives and abrasive grains having transparent or translucent property, the pattern shapes or colors of the pattern layers 2 and 3 formed variously and splendidly on both sides of the stick shaped plastic plate 1, permeates outside of the surfaces. Thus, the pattern shapes or colors of the pattern layers 2 and 3 may be firmly protected, and the damage or abrasion of the pattern layers 2 and 3 due to the abrasion of the abrasive grain layers 6 and 7 may be prevented, and the transparent diamond powder and so on may be adopted as the abrasive grains for constituting the abrasive grain layers 6 and 7.

And, in the formation of the abrasive grain layers 6 and 7 which are applied or spread on the adhesive layers 4 and 5 formed on the upper portions of the pattern layers 2 and 3 transferred variously and splendidly on both sides of the stick shaped plastic plate 1 made up of materials such as PC, PE, PP, acetals etc. , since different abrasive grains each having different grain sizes are formed on both sides by the application or spread, rough grinding and soft puffing may be performed simultaneously.

And, in the formation of the abrasive grain layers 6 and 7 which are applied or spread on the adhesive layers 4 and 5 formed on the upper portions

of the pattern layers 2 and 3 transferred, the screen printing method may be used, so that in production, the inferior cases may be prevented and the nail file of the invention may simply be mass-produced with small number of equipments.

The present invention is valuable since the above mentioned nail file is made by forming pattern layers by transferring them on both sides of the stick shaped plastic plate comprising materials such as PC (polycarbonate), PE, PP, acetals and so forth, and by forming adhesive layers by applying transparent or translucent adhesives by the screen printing method on the pattern layers on both sides, and then by applying and attaching the transparent abrasive grains having relatively different grain sizes on the adhesive layers by the screen printing method, so that, as a result, the appearance of the nail file may be decorated with the pattern layers more in styleless and elegant, and the grinding and trimming of nail may be performed simultaneously by using only one nail file because on one side, large abrasive grains are applied to obtain rough grind effect and on the other side, relatively small sized grains are applied to obtain soft puffing effect by making the abrasive grain sizes on both sides of the file different each other, and, until the abrasive layers are finished their lives and thus disused by the pattern layers'being protected by transparent abrasive grain layers, the pattern layers may not be damaged and the appearance of the nail file may be kept elegantly for a long time so that the elegance of the nail file may be improved.

Although the preferred embodiments of the present invention has been disclosed for illustrative purpose, those skilled in the art will appreciate that various modifications, additions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims.