The Effect Of The Hydrostatic Pressure On The Drawing Process Of Phosphate Glass Fibres

The drawing of biocompatible phosphate glass fibres is considered. The fibres are drawn from a crucible through a nozzle, the fibre diameter, the hydrostatic pressure in the crucible & the force necessary to draw the fibres are determined as a function of the time & the drawing speed. Additionally, the jet angle at the drop formed at the nozzle is studied. The hydrostatic pressure & the mass flow decreases with increasing time. The fibre diameter decreases with increasing time & drawing speed. An increase in the drawing stress is observed along with increasing drawing times, which is explained through the decrease in the hydrostatic pressure & the jet angle of the drop formed in the nozzle of the crucible. The correlations found facilitate to optimise the fibre drawing conditions with respect to fibre properties & quality control.