Modeling material for forming photofabrication model in ink-jet three dimensional printing, supporting material for supporting the shape of photofabrication model on photofabrication and production method of photofabrication model

1. A modeling material for forming a photofabrication model in ink-jet three dimensional printing method, comprising curable resin ingredients (A) to (C) with a weighted average of SP value of 9.0 to 10.3 and a photopolymerization initiator (D), wherein curable resin ingredient (A) is a monofunctional ethylenically unsaturated monomer (A), curable resin ingredient (B) is a polyfunctional ethylenically unsaturated monomer containing no urethane group (B), curable resin ingredient (C) is a urethane group-containing ethylenically unsaturated monomer (C) and, wherein the content of (A) is 50 to 90%, the content of (B) is 3 to 25%, the content of (C) is 5 to 35%, and the content of (D) is 0.1 to 10% on the basis of the weight of the modeling material, and the water-swelling ratio of a phototcured product of the modeling material is not more than 1% by weight.

2. The modeling material according to claim 1 , further comprising 10% by weight or less of a water-soluble component.

3. The modeling material according to claim 1 , wherein the water-swelling ratio of a photocured product of the modeling material is not more than 1% by weight.

4. The modeling material according to claim 1 , wherein the glass transition point of a photocured product of the modeling material is 50 to 120° C.

5. A supporting material for supporting the shape of a photofabrication model on photofabrication in ink-jet three dimensional printing method, comprising a water-soluble monofunctional ethylenically unsaturated monomer (F), an alkylene oxide adduct containing an oxypropylene group (G), and a photopolymerization initiator (D), wherein the content of (F) is 3 to 45%, the content of (G) is 50 to 95%, and the content of (D) is 0.1 to 10% on the basis of the weight of the supporting material.

6. The supporting material according to claim 5 , wherein (G) is polyoxypropylene glycol with a number average molecular weight of 100 to 5,000 and/or water.

7. The supporting material according to claim 5 , wherein (G) is a water-soluble nonreactive compound that is compatible with (F) and is not compatible with a photocured product of (F).

8. The supporting material according to claim 5 , wherein a photocured product of the supporting material has a durometer hardness of 17 to 35 HDA.

9. A two-pack photocurable resin composition for ink-jet three dimensional printing method comprising a combination of a modeling material for forming a photofabrication model in ink-jet three dimensional printing method and a supporting material for supporting the shape of the photofabrication model on photofabrication,

the modeling material comprising curable resin ingredients (A) to (C) with a weighted average of SP value of 9.0 to 10.3 and a photopolymerization initiator (D), wherein curable resin ingredient (A) is a monofunctional ethylenically unsaturated monomer (A), curable resin ingredient (B) is a polyfunctional ethylenically unsaturated monomer containing no urethane group (B), curable resin ingredient (C) is a urethane group-containing ethylenically unsaturated monomer (C) and, wherein the content of (A) is 50 to 90%, the content of (B) is 3 to 25%, the content of (C) is 5 to 35%, and the content of (D) is 0.1 to 10% on the basis of the weight of the modeling material,

the supporting material comprising a water-soluble monofunctional ethylenically unsaturated monomer (F), an alkylene oxide adduct containing an oxypropylene group and/or water (G), and a photopolymerization initiator (D), wherein the content of (F) is 3 to 45%, the content of (G) is 50 to 95%, and the content of (D) is 0.1 to 10% on the basis of the weight of the supporting material.

10. A photofabrication model obtained by allowing the composition according to claim 9 to be photocured by ink-jet three dimensional printing method.

11. A production method of a photofabrication model by ink-jet three dimensional printing method, comprising the step of producing the composition according to claim 10 with a three-dimensional modeling system.

12. The production method according to claim 11 , wherein the three-dimensional modeling system is composed of a personal computer (PC) and a three-dimensional modeling apparatus connected to the PC.

13. The modeling material according to claim 1 wherein said SP value is 9.2-10.0.

14. The supporting material according to claim 5 , further comprising water.

15. A modeling material utilized in an ink-jet three dimensional printing method where discharging of a modeling material from a printer head for modeling material and discharging of a supporting material from a printer head for supporting material are repeated for the formation of layers on a modeling table to shape a three-dimensional fabrication product formed of a photocured product of the modeling material and a photocured product of the supporting material, and the photocured product of the supporting material is separated from the photocured product of the modeling material to extract the photocured product of the modeling material by immersing the three-dimensional fabrication product in water, wherein

the modeling material contains curable resin ingredients (A) to (C) with a weighted average of SP value of 9.0 to 10.3 and a photopolymerization initiator (D), wherein the SP value prevents the cured product of the modeling material from deforming due to swelling with water, and wherein curable resin ingredient (A) is a monofunctional ethylenically unsaturated monomer (A), curable resin ingredient (B) is a polyfunctional ethylenically unsaturated monomer containing no urethane group (B), curable resin ingredient (C) is a urethane group-containing ethylenically unsaturated monomer (C), and, wherein the content of (A) is 50% to 90%, the content of (B) is 3% to 25% and the content of (C) is 5% to 35%, and the content of (D) is 0.1% to 10% on the basis of the weight of the modeling material, and the water-swelling ratio of a photocured product of the modeling material is not more than 1% by weight.