| 摘要 |
A METHOD OF DRYING A VINYL PYRROLIDONE TYPE POLYMER IN WHICH A SOLUTION CONTAINING A VINYL PYRROLIDONE TYPE POLYMER AND WATER IS COATED BY A PRESS ROLL (3, 4, 13, 14, 15) ON A HEAT CONDUCTION SURFACE (1A, 11A) OF A HEATING SURFACE CONTACT TYPE DRIER AND DRIED, AND THE DRIED VINYL PYRROLIDONE TYPE POLYMER IS PEELED BY PEELING MEANS FROM THE HEAT CONDUCTION SURFACE (1A, 11A), WHICH IS FREE OF THE REQUIREMENT FOR FREQUENTLY STOPPING THE DRYING OPERATION FOR MAINTENANCE SUCH AS REMOVAL OF RUST, CAPABLE OF CONTINUOUS DRYING AND DECREASED AT THE COST IS PROVIDED BY USING A PRESS ROLL (3, 4, 13, 14, 15) MADE OF IRON IN WHICH THE SURFACE IS APPLIED WITH A NICKEL PLATING TREATMENT AND THEN WITH A CHROMIUM PLATING TREATMENT IS USED.
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