EXTRUSION OF POLYACRYLONITRILE INTO PRESSURIZED ZONE WITH WATER INTO FILAMENTS

摘要

A B S T R A C TA single phase fusion melt of acrylonitrile polymerand water is melt-spun into a pressurized solidificationzone wherein certain temperature, pressure, and compositionconditions obtain. After spin-drawing the nascent extrudatein the solidification zone, it may be relaxed in a free-to-shrink condition. In a preferred embodiment, the nascentfiber is dried at elevated temperature before it is cooledor before it loses water upon cooling.