| 摘要 |
PURPOSE:To obtain a mold not impaired in strength, good in dimensional accuracy, free from a sink and having a smooth surface by adding a prescribed amt. of air bubbles to the resin layer of a resin mold. CONSTITUTION:A resin mold has a resin layer formed as a molding surface layer by the transfer from a model and can also have a reinforcing layer other than the resin layer. The amt. of air bubbles contained in the resin layer is set to 3-20vol.%. The number of contained air bubbles with a diameter of 200mum or less is pref. 30% or more of the total number of air bubbles. By this constitution, no sink is generated at the time of the molding of the resin mold and the transfer property from the model is excellent and the necessity of repairing after demolding is eliminated. |
