A method for klass ifi of hydrophilic polymer particles and a screening device

摘要

PROBLEM TO BE SOLVED: To provide a method for classifying particulate hydrophilic polymer and a screening apparatus capable of efficiently classifying in a fine particle size, and exhibiting separation capability which the screening apparatus originally has. ;SOLUTION: In a dry particle size classifying method, a classifying device is used in a state of being heated and/or a state of being heat-insulated, it is used in a temperature range of 30-100°C, or the device is used at temperature not lower than 20°C against the particulate hydrophilic polymer and the dry particle size classification device is provided with a heating means and/or heat insulating means.;COPYRIGHT: (C)1998,JPO