Process for the manufacture of acrylonitrile synthetic fibers
Abstract
Abstract THIS INVENTION CONCERNS A PROCESS FOR THE MANUFACTURE OF ACYLONITRILE SYNTHETIC FIBERS WHERIN AND ACRYLONITRILE POLYMER IS DISSOLVED IN NITRIC ACID FOR PROVIDING A SPINNING LIQUID WHICH IS EXTRUDED INTO A COAGULATION BATH AND COAGUALTED FILAMENTS ARE THEN TAKEN OUT FROM TEH COAGULATION BATH AND WASHED WITH FRESH WATER AND FINALLY DRIED. IN THIS PROCESS SAID SPINNING LIQUID IS PASSED THROUGH A GASEOUS MEDIUM SPACED PROVIDED ABOVE THE FREE LIQUID SURFACE OF SAID BATH UNDER CONDITIONS SUCH THAT EVAPRORATION OF THE SOLVENT NITRIC ACID CONTAINED IN THE EXTRUDED SPINNING LIQUID IS SUPPRESSED AND THE DEGREE OF SWELLIN OF THE PRODUCED FILAMENTS IS MAINTAINED TO LESS THAN 350 WT. PERCENT AND LESS TAHN 300 WT. PERCENT WHEN MEASURED UPON THE COAGULATION AND WATER-WASHING OPERATIONS FOR OBTAINING IMPROVED CHARACTERISTIC OF THE PRODUCED FIBERS.
Inventors
- 👤 Toshio Ohfuka
- 👤 Kazunori Sagara
- 👤 Hideo Sato
Bibliographic Details
Claims Analysis
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