| 摘要 |
PURPOSE:To produce artificial marble having a solid feeling due to a difference in color tone by molding a plastic containing inorganic granules mixed therein, applying an external force to the surface layer part of the resultant molded product before complete curing thereof and partially deforming the aforementioned surface layer part. CONSTITUTION:A plastic such as an acrylic resin containing inorganic granules mixed therein is cast into a forming mold, cooled and molded into a required shape. Calcium carbonate, aluminum hydroxide, etc., are used as the aforementioned inorganic granules. Granules having a large grain diameter and granules having a small grain diameter are preferably used together and the granules are mixed in an amount of preferably about >=70wt.% based on the plastic. In a state of curing advanced to an extent so that the resultant molded product may not be deformed without applying an external force thereto before the complete curing of the plastic in the molded product, the external force is applied to the surface layer part of the molded product to partially deform the molded product. In the process, part of the molded product around projecting parts provided in the above-mentioned forming mold can be deformed with the projecting parts in releasing thereof from the mold. The density of the inorganic granules in the aforementioned part is changed to a low or high value with the deformation to cause a difference in color tone and afford artificial marble having a solid feeling. |
