Method for molding shape of bristles of mascara brush for eyelashes, mold used in the method, and mascara brush molded by the method

Abstract

A mascara brush for eyelash makeup includes two strands of iron cores and brush bristles having dorsal portions, which are formed by nylon bristles put on the iron cores and twisted spirally several times so as to be formed radially on the basis of the iron cores, the brush bristles having the dorsal portions having the same length on the basis of the iron cores.

What is claimed is: 
     
         1 . A mascara brush for eyelash makeup comprising:
 two strands of iron cores; and   brush bristles having dorsal portions, which are formed by nylon bristles put on the iron cores and twisted spirally several times so as to be formed radially on the basis of the iron cores, the brush bristles having the dorsal portions having the same length on the basis of the iron cores.   
     
     
         2 . The mascara brush according to  claim 1 , wherein the dorsal portions comprise applying dorsal portions and arranging dorsal portions with lower density than the applying dorsal portions. 
     
     
         3 . A mascara brush molded by a process comprising:
 preparing a mascara by putting nylon bristles constituting brush bristles on two strands of iron cores and twisting them spirally several times so as to spread in all directions on the basis of the iron cores so that the brush bristles have a circular section;   seating the brush bristles of the prepared mascara in a dorsal portion molding hole of a mold;   putting the mold, in which the brush bristles are seated, into a molding furnace and heating the molding furnace so that the brush bristles of the mascara made of nylon are thermally transformed into a form corresponding to the dorsal portion molding hole of the mold to thereby mold dorsal portions;   drawing out the mold and extracting the mascara brush having the dorsal portions by being thermally transformed in correspondence with the dorsal portion molding hole after the mold is heated and the brush bristles having the dorsal portions are completely molded; and   drying the mascara extracted from the dorsal portion molding hole of the mold at room temperature so as to plastic-form the dorsal portions of the brush bristles formed by thermal transformation through an annealing process.   
     
     
         4 . The mascara brush according to  claim 3 , wherein the molding furnace is heated at temperature of 195° C. to 205° C. 
     
     
         5 . The mascara brush according to  claim 3 , wherein the mold heated in the molding furnace is heated for 17 minutes to 23 minutes.