| 摘要 |
<p>PURPOSE:To obtain the formed product of polymers-composite for precision casting with high strength and without blow-holes by following method in which liquid polymeric monomer and filler-powder with larger density than that of said monomer are mixed and poured into a mold, and then hardened by polymerization under special condition. CONSTITUTION:Liquid polymeric monomers and filler powder having larger density than that of said monomers by 0.4g/cm<3>, are mixed, and thus paste like composite material is made. This paste is poured into a mold, and after the mold is kept under centrifugal gravity larger than 500G, the paste like composite-material is hardened by polymerization. The filler with high density sinks to the mold-bottom by centrifugal gravity F, and the polymeric monomers fills up the gap filled with the filler densely. After hardening by polymerization, the layer containing high filler amount is taken out and used as hardened formed products. As this formed product has high strength and hardness and does not contain blow-holes, it has superior aesthetic property. USE:Crown, inlay, holder, artificial tooth.</p> |
