INDEX parameters, dual

The dual slot die was used in the experiments. The spinneret hole diameter was 0.3 mm. The length of the die was 300 mm. The angle between the air slot and the spiimeret axis was 30°, the slot width was 0.25 mm and the head width was 0.5 mm. The polymer used was S904 polypropylene with the melt flow index of 52. The processing parameters concerned were the polymer flow rate 0.0017, 0.0025, 0.0033 g/s initial air velocity 87, 174, 261 m/s and die-to-coUector distance 8, 11, 14 cm. 

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