Applicator for cosmetics

Abstract

A compounded rubber, which comprises an NBR polymer, an organic peroxide and a blowing agent, to which 1 to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler and 10 to 200 parts by weight of precipitated calcium carbonate having a prismatic particle shape and a serving as a filler are added to 100 parts by weight of the NBR polymer, is extrusion molded by means of a continuous extruder, and heated by use of HA heating and UHF heating in combination throughout the rubber to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure. The sponge is passed through press rolls, and the resulting sheet stock is cut or punched with a cutting or punching machine into pieces of a desired form to obtain an applicator for cosmetics.

What is claimed is:  
     
         1 . An applicator for cosmetics which comprises a body obtained by subjecting a compounded rubber to extrusion molding in a given shape, heating a molded rubber to cause vulcanization or crosslinkage therein to provide a molded rubber, and heating the molded rubber to cause vulcanization or crosslinkage therein, and stamping and/or cutting the vulcanized or crosslinked rubber into pieces of a given shape.  
     
     
         2 . The applicator according to  claim 1 , wherein said compounded rubber is made of at least two types of compounded rubbers, which are extrusion molded into plural layers integrally combined together.  
     
     
         3 . The applicator according to  claim 1  or  2 , wherein said compounded rubber is made of a composition which comprises as a major component a polymer having a polar group.  
     
     
         4 . The applicator according to  claim 3 , wherein said polymer having a polar group is NBR wherein a content of acrylonitrile in the NBR polymer is not larger than 30%.  
     
     
         5 . The applicator according to any one of  claims 1  to  4 , wherein the compounded rubber is extrusion molded in a given shape and heated by irradiation with a microwave.  
     
     
         6 . The applicator according to any one of  claims 1  to  5 , wherein said applicator is a sponge puff.  
     
     
         7 . The applicator according to  claim 1 , wherein said body is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding, to the resulting mixture, 1 to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler per 100 parts by weight of the NBR polymer, heating the resulting compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a given form.  
     
     
         8 . The applicator according to  claim 1 , wherein said body is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding, to the resulting mixture, 10 to 200 parts by weight of precipitated calcium carbonate having a prismatic particle shape and a serving as a filler per 100 parts by weight of the NBR polymer, heating the resulting compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a given form.  
     
     
         9 . The applicator according to  claim 1 , wherein said body is obtained by providing an NBR polymer, an organic peroxide and a blowing agent, adding, to the resulting mixture, 1 to 100 parts by weight of a synthetic silicic acid serving as a reinforcing filler and 10 parts by weight to 200 parts by weight of precipitated calcium carbonate having a prismatic particle shape and serving as a filler, each per 100 parts by weight of the NBR polymer, heating the compounded rubber as a whole by use of HA heating and UHF heating in combination to cause vulcanization and expansion thereby providing a thick sponge having a homogenous cell structure, passing through press rolls, and cutting the resulting sheet stock into pieces of a given form.  
     
     
         10 . The applicator according to any one of  claims 7  to  9 , wherein said applicator is a sponge puff.