| 摘要 |
PURPOSE:To provide the titled resin having high strength even at a low density and excellent durability and suitable for use as an ink roll, etc., by pressure molding a row resin powder obtd. by blending a sublimable material powder with a synthetic resin powder and optionally a synthetic resin powder at ordinary temp. and sintering the resulting molding. CONSTITUTION:The cavity of a pressure molding machine 1 is filled with a predetermined quantity of a synthetic resin powder 5 such as nylon resin, and a die 2 is moved upward to form a cavity, which is then filled with a predetermined quantity of a synthetic resin powder 6 obtd. by blending a sublimable material powder (e.g. naphthalene) with the above-described synthetic resin powder. If desired, only the powder 6 may be fed. The powder is pressed at room temp. under a pressure of 100kg/cm<2> by means of an upper punch 4 and a lower punch 3 to obtain a compacted powder molding 9 composed of the synthetic resin layer 7 and the sublimable material-contg. synthetic resin layer 8. The molding is taken out of the molding machine 1 and sintered to evaporate the sublimable material thus obtaining the titled sintered resin having a high strength even at a low density.
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