Patent ID: 7431879
Filing Date: 2008-10-07
Classification: B29C,B33Y

Abstract:
1. A process of producing a three-dimensionally shaped object comprising: (a) a layer forming step of forming a powder material having a refractive index n (b) a cross-sectional shape forming step of feeding an ultraviolet (UV) curable binder in a cross-sectional shape into the powder material layer formed in the foregoing step and irradiating UV rays to cure the binder, thereby forming a bound body of the powder material in the cross-sectional shape corresponding to a cut surface of a subject to be shaped cut at a certain one plane with a binding agent having a refractive index n (c) repeating these steps successively, thereby successively laminating and forming the bound body of the powder material corresponding to a cut surface of the subject to be shaped cut at a plurality of planes, wherein (d) n (e) a volatile component of the UV curable binder after the curing with UV rays is not more than 5% by weight, wherein the ultraviolet (UV) curable binder consists essentially of a photopolymerization initiator, a polymerizable monomer and an additive for viscosity modification, wherein the additive for viscosity modification is a compound having a low viscosity and is capable of being copolymerized with the polymerizable monomer and (f) the amount (W) of the volatile component of the UV curable binder was measured by the weight method according to the following equation: W W