SOME ASPECTS OF SPINNING FIBRES FROM FLUORINE-CONTAINING COPOLYMERS BY MELT EXTRUSION.

From the view point of high fiber-forming ability and preparation of fibers which have valuable service properties, the greatest interest is presented by copolymers of TFE (Tetrafluoroethylene) with ethylene (CP TFE-E) and of TFE with 3-5 mole percent of a perfluoroalkyl vinyl ether (CP TFE-PFAVE). The following special features have been found in spinning fluorine-containing fibers: a small length of the deformation zone and a high degree of preliminary orientation. The advantages of spinning fibers from CP TFE-E or CP TFE-PFAVE as compared with other thermoplast fluorinated monomers consist in a high stability and speed of spinning.