Three-dimensional-modeling soluble material
A soluble material for three-dimensional modeling, which is used as a raw material of a support material for supporting a three-dimensional object when the three-dimensional object is produced, using a 3D printer of a FDM system, includes a polyester resin including one or more aromatic dicarboxylic acid monomer units A with a sulfonate group, one or more dicarboxylic acid monomer units B without a sulfonate group, and one or more diol monomer units. The proportion of the aromatic dicarboxylic acid monomer unit(s) A in the total of all dicarboxylic acid monomer units is from 10 to 70 mol %. The soluble material has hygroscopicity resistance while the material is large in dissolution rate into any neutral water and removable speedily from a precursor of the three-dimensional object without using any aqueous strong alkaline solution.
1. A soluble material for three-dimensional modeling, which is used as a raw material of a support material for supporting a three-dimensional object when the three-dimensional object is produced, using a 3D printer of a fused deposition modeling system;
the soluble material comprising a polyester resin comprising one or more aromatic dicarboxylic acid monomer units A with a sulfonate group, one or more dicarboxylic acid monomer units B without a sulfonate group, and one or more diol monomer units; and the proportion of the aromatic dicarboxylic acid monomer unit(s) A in the total of all dicarboxylic acid monomer units being from 10 to 70 mol %,
wherein said polyester resin has a weight average molecular weight in the range 11,000 to 38,000, and
wherein the content of the sulfonate groups in the polyester resin is in the range 0.5 to 3 mmol/g.
2. The soluble material for three-dimensional modeling according to claim 1 , wherein an aromatic dicarboxylic acid A from which the aromatic dicarboxylic acid monomer unit(s) A is/are derived is selected from the group consisting of 5-sulfoisophthalic acid, and 2-sulfoterephthalic acid.
3. The soluble material for three-dimensional modeling according to claim 1 , wherein a counter ion of a sulfonic acid group constituting the sulfonate group is at least one selected from the group consisting of a sodium ion, a potassium ion, a magnesium ion, and an ammonium ion.
4. The soluble material for three-dimensional modeling according to claim 1 , wherein a dicarboxylic acid B from which the dicarboxylic acid monomer unit(s) B is/are derived is at least one selected from the group consisting of aromatic dicarboxylic acids and alicyclic dicarboxylic acids.
5. The soluble material for three-dimensional modeling according to claim 1 , wherein a diol C from which the diol monomer unit(s) is/are derived has 2 to 31 carbon atoms.
6. The soluble material for three-dimensional modeling according to claim 1 , wherein the diol monomer unit(s) is/comprise one or more diethylene glycol units, and the proportion of the diethylene glycol unit(s) in the total of all diol monomer units in the polyester resin is from 5 to 60 mol % both inclusive.
7. The soluble material for three-dimensional modeling according to claim 1 , which is in the form of a filament.
8. The soluble material for three-dimensional modeling according to claim 7 , wherein the filament has a diameter of 0.5 to 3.0 mm.
9. The soluble material for three-dimensional modeling according to claim 7 , which is a drawn soluble material for three-dimensional modeling.
10. The soluble material for three-dimensional modeling according to claim 1 , wherein a dicarboxylic acid B for deriving the dicarboxylic acid monomer unit B is at least one dicarboxylic acid selected from the group consisting of an aromatic dicarboxylic acid and an alicyclic dicarboxylic acid.
11. The soluble material for three-dimensional modeling according to claim 1 , wherein the rate of the total amount of the aromatic dicarboxylic acid monomer unit A and the dicarboxylic acid monomer unit B in the total amount of all dicarboxylic acid monomer units in the polyester resin is 80 mol % or more.
12. The soluble material for three-dimensional modeling according to claim 1 , wherein a diol C for deriving the diol monomer unit is at least one diol selected from the group consisting of an aliphatic diol and an aromatic diol.
13. The soluble material for three-dimensional modeling according to claim 12 , wherein the diol C includes diethylene glycol, wherein the proportion of units of diethylene glycol in the total of all diol monomer units in the polyester resin is 5 mol % or more and 60 mol % or less.
14. The soluble material for three-dimensional modeling according to claim 1 , wherein the polyester resin is a polyester resin α in which the proportion of the aromatic dicarboxylic acid monomer units A in the total of all dicarboxylic acid monomer units, which include the aromatic dicarboxylic acid units A, is from 15 to 40 mol %; the proportion of the dicarboxylic acid monomer units B in the same total is from 60 to 85 mol %; and a dicarboxylic acid B for yielding the dicarboxylic acid monomer units B is 2,5-furandicarboxylic acid.
15. The soluble material for three-dimensional modeling according to claim 14 , wherein the proportion of the aromatic dicarboxylic acid monomer units A in the total of all the dicarboxylic acid monomer units in the polyester resin α, which include the aromatic dicarboxylic acid monomer units A, is 15 mol % or more and 40 mol % or less.
16. The soluble material for three-dimensional modeling according to claim 14 , wherein the proportion of the aromatic dicarboxylic acid monomer units B in the total of all the dicarboxylic acid monomer units in the polyester resin α, which include the aromatic dicarboxylic acid monomer units A, is 60 mol % or more and 85 mol % or less.
17. The soluble material for three-dimensional modeling according to claim 14 , wherein the aromatic dicarboxylic acid A in the polyester resin α is at least one selected from the group consisting of 5-sulfoisophthalic acid and 2-sulfoisophthalic acid.
18. The soluble material for three-dimensional modeling according to claim 14 , wherein a diol C in the polyester resin α from which the diol monomer unit(s) is/are derived is at least one selected from the group consisting of ethylene glycol, diethylene glycol, 1,3-propane diol, and dipropylene glycol.
19. The soluble material for three-dimensional modeling according to claim 1 , wherein the content of the polyester resin in the soluble material for three-dimensional modeling is 30% by mass or more.