| 摘要 |
PURPOSE:To make it possible to improve restoring resistance of a sponge when it is stored without spoiling absorptive characteristics when it is used by pressing a cellulose sponge obtd. by coagurating a viscose mixture wherein a viscose, a reinforcing fiber and a crystalline sodium sulfate are incorporated, regenerating and washing it under a condition where the water content is adjusted in a specified range. CONSTITUTION:A cellulose sponge is obtd. by incorporating Glauber's salt, a reinforcing fiber, etc., in a viscose, molding it into a specified shape, heat- coagurating it, washing the coagulant, treating the washed product with diluted sulfuric acid soln., washing it again, neutralizing it with sodium carbonate, washing and drying it. A compressed body of the cellulose sponge is obtd. by pressing the obtd. cellulose sponge by means of press rollers. In this case, the water content of the cellulose sponge is adjusted at 13-35% which is beyond the equilibrium water content of cellulose. |
