Patent ID: 7674423
Filing Date: 2010-03-09
Classification: B29C,B29K,B33Y

Abstract:
1. A process for producing a three-dimensional model, the process comprising: (a) a layer formation step of forming a layer of a synthetic organic powder material having a refractive index n (b) a shape formation step of bonding the powder material layer into a predetermined shape by a binder that gives a refractive index n (c) sequentially repeating the above steps; the absolute value of the difference between the refractive index n the binder comprising two or more types of binders selected from the group consisting of at least one type of colored binder, a white binder, and a colorless transparent binder, wherein each of the colored binder, the white binder, and the colorless binder includes UV-curing compound, the two types of monomers being a monomer (a) and a monomer (b), a homopolymer of the monomer (a) having a refractive index of 1.55 to 1.75, and a homopolymer of the monomer (b) having a refractive index of 1.35 to less than 1.55, monomer (a) being the aromatic vinyl compound and monomer (b) being the (meth)acrylate ester, and the binder comprising a (meth)acrylate ester of an aliphatic polyhydric alcohol.