Method of producing three-dimensional shaped article

Abstract

A method of producing a three-dimensional shaped article includes a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in fluid than the material for forming the shaped article, a step of forming a stack by melting and stacking the particle layers, and a step of removing the material having higher solubility in the fluid than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the fluid than the material for forming the shaped article in the fluid.

1 . A method of producing a three-dimensional shaped article, comprising:
 a step of forming particle layers by arranging particles containing a material for forming a shaped article and particles containing a material having higher solubility in water than the material for forming the shaped article;   a step of forming a stack by melting and stacking the particle layers; and   a step of removing the material having higher solubility in the water than the material for forming the shaped article from the stack by dissolving the material having higher solubility in the water than the material for forming the shaped article in the water,   wherein the material having higher solubility in the water and the material for forming the shaped article contains a water-soluble carbohydrate.   
     
     
         2 .- 4 . (canceled) 
     
     
         5 . The method according to  claim 1 , wherein the water-soluble carbohydrate is a water-soluble dietary fiber. 
     
     
         6 . (canceled) 
     
     
         7 . The method according to  claim 1 , wherein the material having higher solubility in the water than the material or forming the shaped article contains at least one selected from the group consisting of a water-soluble dietary fiber, polydextrose, lactitol, and maltotetraose. 
     
     
         8 .- 9 . (canceled) 
     
     
         10 . The method according to  claim 1 , wherein the material for forming the shaped article is at least one selected from the group consisting of polypropylene, an acrylonitrile-butadiene-styrene copolymer, polymethyl methacrylate, and polyvinyl acetate. 
     
     
         11 . The method according to  claim 1 , wherein the step of removing the material having higher solubility in the water than the material for forming the shaped article is performed by immersing the stack in the water. 
     
     
         12 . The method according to  claim 1 , wherein the step of forming the particle layers by arranging the particles containing the material for forming the shaped article and the particles containing the material having higher solubility in the water than the material for forming the shaped article is performed by transfer. 
     
     
         13 . The method according to  claim 12 , wherein the transfer is performed by electrostatic transfer. 
     
     
         14 . The method according to  claim 1 , wherein the step of forming the stack by melting and stacking the particle layers is performed by stacking the particle layers after the particle layers are melted. 
     
     
         15 . The method according to  claim 1 , wherein the step of forming the stack by melting and stacking the particle layers is performed by melting the particle layers after the particle layers are stacked. 
     
     
       The method according to  claim 1 , wherein the stacking of the particle layers is performed by transfer. 
     
     
         17 . The method according to  claims 1 , wherein the melting of the particle layers is performed by heating. 
     
     
         18 . The method according to  claim 1 , wherein the solubility parameter of the particles containing the material having higher solubility than the material for forming the shaped article is 2 (MPa) 1/2  or more closer to the solubility parameter of the water than the solubility parameter of the particles containing the material for forming the shaped article. 
     
     
         19 . The method according to  claim 18 , wherein the solubility parameter of the particles containing the material having higher solubility than the material for forming the shaped article is 15 (MPa) 1/2  or more closer to the solubility parameter of the fluid water than the solubility parameter of the material for forming the shaped article. 
     
     
         20 . The method according to  claim 1 , wherein the water-soluble carbohydrate is sugar.