| 摘要 |
PURPOSE:To make it possible to manufacture an excellent boilproof molded item at low cost by a structure wherein a mixture of radial-curing type resin and glass flakes as filter (or flake compound) is set as an intermediate layer next to a gelcoat layer in a molded item, in which both aesthetic sense and water resistance are requested in combination, such as a bathtub a washstand and tiles. CONSTITUTION:Flake compound is applied to a layer next to a gelcoat layer. Further, filler-filled resin is cast to the necessary thickness next to the flake compound layer. Preferable glass flakes used for flake compound are coarse particles and are the type having a wide distribution of particle diameters. Further, as radical-curing type resin, unsaturate polyester resin, vinylester resin, polymer, the side chain of which has radical-curable unsaturated groups, unsaturated uerthane resin and the like are examples. The mixing ratio of the glass flake and the radical-curing type resin in terms of the blending ratio (wt%) of the glass flakes is preferably about 10-60 %. As the resin for gelcoat and the casting resin for backing, radical-curing type resin or another kind of resin is used. As the filler to mix with the casting resin for backing, various materials are used in accordance with required physical properties. |
