MODEL MATERIAL, SUPPORT MATERIAL AND COMBINATION OF MODEL MATERIAL AND SUPPORT MATERIAL USED IN INKJET PHOTO-MOLDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a method which provides a photo-cured product of a model material reduced in water swelling deformation and allows extracting a photo-cured product of a model material by immersing a photo-cured product of the model material and a support material.SOLUTION: A model material is used in an inkjet photo-molding method which comprises discharging a model material, in the form of a layer, onto a molding table from a printer head for the model material and discharging a support material dissolvable by immersion in water from a printer head for the support material, with the discharging operations repeated, to mold a three-dimensional photo-cured product composed of the model material. The model material contains a curable resin ingredient of a weighted average value of the SP value of 9.0-10.3; a photo-cured product composed of the model material shows a water swelling ratio of 1 wt.% or smaller; and the curable resin ingredient of the model material comprises a monofunctional ethylenic unsaturated monomer (A), a polyfunctional ethylenic unsaturated monomer (B) free of an urethane group, a urethane-containing ethylenic unsaturated monomer (C) and a photopolymerization initiator (D).