Three-dimension formation composition, method of manufacturing three-dimensional structure, and three-dimensional structure

1. A three-dimension formation composition, comprising:

particles;

a binding resin; and

a water-based solvent,

wherein the binding resin has an ammonium salt of a carboxyl group as a functional group, and

the weight average molecular weight of the binding resin is 50000 to 200000.

2. The three-dimension formation composition according to claim 1 ,

wherein the binding resin contains one or two or more selected from the group consisting of a reaction product of an olefin-maleic anhydride copolymer with ammonia, a polyacrylic acid ammonium salt, an ammonium salt of carboxymethyl cellulose, a polystyrene carboxylic acid ammonium salt, an ammonium salt of an acrylamide-acrylic acid copolymer, and an alginic acid ammonium salt.

3. The three-dimension formation composition according to claim 1 ,

wherein the binding resin has a structure of acid anhydride which is formed by heating.

4. The three-dimension formation composition according to claim 1 ,

wherein the binding resin has a cyclic chemical structure which is formed by heating.

5. The three-dimension formation composition according to claim 4 ,

wherein the binding resin has a five-membered or six-membered cyclic structure which is formed by heating.

6. The three-dimension formation composition according to claim 1 ,

wherein the binding resin has an amide group (—CONH 2 ) together with the ammonium salt of a carboxyl group in a molecule.

7. The three-dimension formation composition according to claim 1 , further comprising:

a compound having an amide group (—CONH 2 ) in addition to the binding resin.

8. The three-dimension formation composition according to claim 7 ,

wherein the compound having an amide group is polyacrylamide.

9. A method of manufacturing a three-dimensional structure, in which the three-dimensional structure is manufactured by laminating a layer, the method comprising:

forming the layer using a three-dimension formation composition containing particles, a binding resin, and a water-based solvent;

removing the water-based solvent from the layer by heating the layer; and

applying a binding solution containing a binder to the layer,

wherein the binding resin has an ammonium salt of a carboxyl group as a functional group.

10. The method of manufacturing a three-dimensional structure according to claim 9 ,

wherein, in the removing of the water-based solvent, the layer is heated to a temperature equal to or higher than the glass transition temperature of the binding resin.

11. The method of manufacturing a three-dimensional structure according to claim 9 ,

wherein, in the removing of the water-based solvent, the heating temperature is 30 degrees Celsius to 140 degrees Celsius.

12. The method of manufacturing a three-dimensional structure according to claim 9 , further comprising:

removing the particles, which are not bound by the binder, after repeating the forming of the layer, the removing of the water-based solvent, and the applying of the binding solution,

wherein the pH of a removing solution used in the removing of the unbound particles is 9 or more.

13. The method of manufacturing a three-dimensional structure according to claim 9 , further comprising:

removing the particles, which are not bound by the binder, after repeating the forming of the layer, the removing of the water-based solvent, and the applying of the binding solution,

wherein, in the removing of the unbound particles, ammonia is used.

14. A three-dimensional structure, which is manufactured by the method of manufacturing a three-dimensional structure according to claim 9 .