PURPOSE: To obtain polyvinyl alcoholic fiber having a high strength, initial elastic modulus, resistance to hot water and abrasion and suitable as fishing nets, ropes, etc.
CONSTITUTION: PVA fiber is obtained by passing a solution of PVA having 3900 polymerization degree in DMSO through an air gap of 10 mm distance into a coagulation bath, carrying out dry jet-wet spinning, then extracting the DMSO, subsequently applying a catalyst solution prepared by mixing phosphoric acid in an oiling agent, drying the prepared fiber, providing undrawn yarn, hot-drawing the undrawn yarn at 20m/min speed under dry heat conditions and forming an intermolecularly crosslinked structure on the fiber surface. Thereby, the objective PVA fiber, excellent in abrasion resistance and having ≥15g/d tensile strength, ≥250g/d initial elastic modulus and ≥140°C resistance to hot water is obtained.
KODA KAZUTAKA
MURAKAMI SHIRO
NAGATA NAOHIKO
TAKAGI SHINYA
