HYDROPHILIC POLYCARBONATE FIBRES HAVING A HIGH SECOND ORDER TRANSITION POINT AND PROCESS FOR MANUFACTURING THEM

摘要

Dry-spun hydrophilic core-jacket filaments and fibres of polycarbonates having a porosity and a water retention capacity of at least 10%, a mercury density of less than 1.0 g/cc, a strength of at least 1.5 cN/dtex and a second order transition temperature of at least 125 DEG C. and a method for producing said filament and fibres by a dry-spinning process, wherein, immediately on leaving the spinnerette but before solidifying, the filaments are brought into contact with steam.