Storage container, method for molding resin, and method for forming plating film

Abstract

A storage container is provided, which includes carbon dioxide containing a functional material and a container body in which carbon dioxide has been hermetically contained. Accordingly, a method for molding a resin, a method for forming a plating film, and the storage container for carbon dioxide, which are excellent in the mass productively at low cost, are provided without using any special high pressure apparatus for producing a supercritical fluid.

1 . A storage container comprising:
 carbon dioxide which contains a functional material; and   a container body in which the carbon dioxide has been hermetically contained.   
   
   
       2 . The storage container according to  claim 1 , wherein the functional material is metallic fine particles. 
   
   
       3 . The storage container according to  claim 1 , wherein the functional material is one of a hydrophilic material and a hydrophobic material. 
   
   
       4 . The storage container according to  claim 1 , wherein the functional material is inorganic fine particles. 
   
   
       5 . The storage container according to  claim 1 , wherein the functional material is a surfactant. 
   
   
       6 . The storage container according to  claim 1 , wherein the carbon dioxide includes liquid carbon dioxide having a pressure in a range of 3 MPa to 7.38 MPa, and the storage container is provided with a siphon tube through which the liquid carbon dioxide in the container body is taken out. 
   
   
       7 . The storage container according to  claim 6 , further comprising a stirring apparatus. 
   
   
       8 . The storage container according to  claim 7 , wherein the stirring apparatus includes a stirring bar which is provided in the container body, and a magnetic stirrer which drives the stirring bar. 
   
   
       9 . The storage container according to  claim 8 , wherein the container body is formed of a nonmagnetic material. 
   
   
       10 . The storage container according to  claim 9 , wherein the nonmagnetic material is formed of one material selected from the group consisting of aluminum, stainless steel, inconel, hastelloy, and titanium. 
   
   
       11 . The storage container according to  claim 1 , wherein the carbon dioxide has a pressure in a range of 3 MPa to 15 MPa. 
   
   
       12 . A method for molding a resin, comprising:
 preparing liquid carbon dioxide containing a functional material; and   impregnating the functional material into the resin by bringing the liquid carbon dioxide into contact with the resin having a temperature higher than that of the liquid carbon dioxide.   
   
   
       13 . The method for molding the resin according to  claim 12 , wherein a state of the resin is controlled so that the liquid carbon dioxide is changed into one of carbon dioxide in a supercritical state and high pressure carbon dioxide gas when the liquid carbon dioxide is brought into contact with the resin. 
   
   
       14 . The method for molding the resin according to  claim 12 , which is a method for molding a thermoplastic resin using an injection molding machine provided with a plasticizing cylinder for injecting a melted resin into a mold, the method for molding the thermoplastic resin comprising:
 introducing the liquid carbon dioxide containing the functional material into a flow front portion of the plasticizing cylinder to bring the liquid carbon dioxide into contact with the melted resin in the plasticizing cylinder so that the functional material is impregnated into the melted resin; and   injecting the melted resin in the plasticizing cylinder into the mold to fill the mold therewith.   
   
   
       15 . The method for molding the resin according to  claim 12 , which is a method for molding a thermoplastic resin using an extrusion molding machine, the method for molding the thermoplastic resin comprising:
 bringing the liquid carbon dioxide containing the functional material into contact with the thermoplastic resin which is in a melted state or a softened state in the extrusion molding machine to impregnate the functional material into the thermoplastic resin; and   performing extrusion molding for the thermoplastic resin into which the functional material has been impregnated.   
   
   
       16 . The method for molding the resin according to  claim 12 , wherein the functional material is metallic fine particles. 
   
   
       17 . The method for molding the resin according to  claim 12 , wherein the functional material is one of a hydrophilic material and a hydrophobic material. 
   
   
       18 . The method for molding the resin according to  claim 12 , wherein the functional material is inorganic fine particles. 
   
   
       19 . The method for molding the resin according to  claim 12 , wherein the functional material is a surfactant. 
   
   
       20 . The method for molding the resin according to  claim 12 , wherein the preparation of the liquid carbon dioxide containing the functional material includes preparing a storage container which is filled with the liquid carbon dioxide containing the functional material. 
   
   
       21 . A method for forming a plating film, comprising:
 molding a molded article including metallic fine particles impregnated into a surface of the molded article by using the method for forming the resin as defined in  claim 16 ; and   forming the plating film by an electroless plating method on the surface of the molded article into which the metallic fine particles are has been impregnated.