Abstract:

In order to directly express the attenuation effect of the air on the fiber in the melt blowing process, the fiber motion in the melt blowing was numerically simulated. Firstly, the fiber in the melt blowing was regarded as deads which connected by Maxwell elements. Then, given air velocity and air temperature were applied to the fiber model. The information such as fiber velocity and fiber diameter in the melt blowing was predicted by this simulation via Lagrange method. The simulation results showed that in the process that the fiber is far away from the spinneret, the air fiber gradually weadened as the air velocity and air temperature gradually decreased. The fiber retracts under viscoelastic force when the air flow force was less than the wiscoelastic force of the fiber, which macroscopically shows the fiber diameter re-ncreasing. Finally, the fiber diameters were off-line measured under certain experimental conditions, and the reault also indicates the fiber diameter re-increasing phenomenon in melt blowing process.

Key words: melt blowing, fiber path, motion simulation, fiber diameter