The polycarbonate nuclear track microfilter was studied. The pore structure pore size distribution
overlap of pores
flow rate
chemical resistance heat resistance
radioactivity and tensile strength of the microfilters were measured. These properties of the microfilter are quite comparable to that of Nuclepore corporation in USA. The microfilter has been applied to the clarification of ultra pure chemical reagents and the study of deformability of red blood cells.