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Experimental Study and Numerical Analysis for Prediction of the Fibre Diameter of Polylactic Acid (PLA) Spunbonded Nonwovens

Research and development

Author:

  • Bo Zhao
    College of Textiles, Zhongyuan University of Technology, Zhengzhou, P. R. China

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Abstract:

An air-drawing model of the polylactic acid (PLA) spunbonding process is presented and solved by introducing numerical computation results of the air jet flow field of an aerodynamic device. At the same time, the model is also verified by experimental results obtained with our university’s equipment. The influence of the density and specific heat capacity of polymer melt at a constant pressure changing with the polymer temperature on the fibre diameter was studied. The fibre diameters predicted is in good agreement with experimental data. The effects of processing parameters on the fibre diameter are further analysed. We find that a lower polymer throughput rate, a higher initial temperature of the melt,a higher initial temperature, velocity, and suction speed of the air can all produce finer fibres, but during the incruse in the venturi gap, the fibre diameters first decrease and next increase again. The results encourage us to further investigate how fine a fibre diameter can be obtained in the spunbonding process and what factors influence the fibre diameter formed. Furthermore, the results also show the great perspective of this research in the field of the (CAD), of the spunbonding process and technology.

Tags: polylactic acid, spunbonding, nonwovens, fibre diameter, air-drawing, computer modeling

Citation: Bo Zhao; Experimental Study and Numerical Analysis for Prediction of the Fibre Diameter of Polylactic Acid (PLA) Spunbonded Nonwovens. FIBRES & TEXTILES in Eastern Europe 2009, Vol. 17, No. 5 (76) pp. 82-86.

Published in issue no 5 (76) / 2009, pages 82–86.

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