| 摘要 |
PURPOSE:To obtain cellular homogenous particles by forming a polymer solution capable of having a cloud point into droplets of uniform size, jetting the droplets from an opening into a vapor phase, charging he droplets with electricity of the same sign, reducing the temperature below the cloud point and admitting the droplets into a coagulating solution having a surface tension so as to naturally wet the droplets. CONSTITUTION:A polymer solution capable of having a cloud point (preferably 50-1,000cP viscosity and 5-20% concentration) is jetted from an opening (preferably a circular shape with 20-300mum hole diameter) at a prescribed flow velocity (preferably 5-20m/sec) is droplets of a uniform size into a vapor phase while applying disturbance with a prescribed period (preferably 2,000-3,000Hz) thereto, charged with electricity of the same sign and cooled to a temperature below the cloud point, admitted into a coagulating solution having surface tension so as to naturally wet the above-mentioned droplets and coagulated to afford polymer particles, cellular from the surface to the interior, having a narrow particle size distribution and suitable as a base material for ion exchange resins, etc. |
