PROCESS FOR THE MANUFACTURE OF DISCOUNTINUOUS FIBRILS

摘要

Process for the manufacture of discontinuous fibrils by the abrupt pressure release through an orifice of a two-phase liquid mixture of molten polymer and solvent which is at elevated temperature and pressure so as to bring about the instantaneous vaporisation of the solvent and the solidification of the polymer, the solvent not dissolving more than 50 g/litre of polymer under normal conditions of temperature and pressure and possessing a normal boiling point of more than 20.degree.C lower than the polymer melting point. The process is characterized by the fact that a make-up fluid is introduced into the two-phase liquid mixture before the pressure release is complete. The fibrils obtained are particularly suitable for the production by the usual methods of nonwoven textiles and synthetic papers.