Process for the production of acrylic filaments
Abstract
Abstract A PROCESS IS PROVIDED FOR THE PRODUCTION OF SUBSTANTIALLY ROUND ARCYLIC FILAMENTS WHICH ARE PARTICULARLY SUITED AS PERCUSORS FOR THE FORMATION OF CARBON FILAMENTS. A FIBERFORMING ACRYLIC POLYMER, SUCH AS AN ACRYLONITRILE HOMOPOLYMER, WHILE DISSOLVED IN A DIMETHLACETAMIDE CONTAINING LITHIUM CHLORIDE SOLVENT IS EXTRUDED INTO AN ESSENTIALLY NON-AQUEOUS COAGULATION BATH CONSISTING ESSENTIALLY OF ETHYLENE GLYCOL AND DIMETHYLACETAMIDE PRESENT IN CONCENTRATIONS FOUND CAPABLE OF PRODUCING ESSENTIALLY ROUND HOMOGENEOUS (I.E. SUBSTANTIALLY FREE OF VOIDS AND INCURSIONS) FILAMENTS. THE RESULTING AS-SPUN FILAMENTS ARE INITIALLY WASHED IN RELATIVELY COOL WATER, AND ARE DRAWN TO INCREASE THEIR ORIENTATION.
Inventors
- 👤 Michael J Ram
- 👤 John P Riggs
Bibliographic Details
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