Zouhaier ROMDHANI, Ayda BAFFOUN, Sadok ROUDESLI, Mohamed HAMDAOUI

MODELING AND KINETIC STUDIES ON THE SPREADING PHENOMENON OF INK JET PRINTING OVER POLYESTER FABRIC

The present research deals with an experimental study of the liquid drop through polyester fabric in the spreading regime with no splashing. First, the wetting phenomenon parameters are characterized by the digidrop 3S permitting us to measure correctly the contact angle, the diameter, the height, the volume and the drop profile in contact with porous fabric during experiment time. Results exhibited that the liquid drop impact shows the presence of three different phases. Then, a mathematical model is developed in order to interpret the experimental data in terms of kinetic spreading, evaporation and diffusion phenomena on the porous materials. The theoretical predictions agree well with the experimental data with high correlation coefficients. It is also proved that the kinetic wetting parameters depend on the structure of the woven fabric (weft count), the drop size and the surface tension. This study represents an important contribution for the understanding of the behavior of a liquid drop after its projection on the textile support and it could constitute a prototype of the industry of ink jet printing.

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