Abstract: Abstract Polyester is used widely because of its outstanding wearability. But simultaneously, the application of polyester fabric is confine due to its limited hygroscopicity. In this paper, the polyester fabric was ionized with ionization reagent. The results showed that the ionized polyester fabrics had wonderful hydrophilic property. The water contact angle decreased from 157.25o to 0°; the capillary rise height increased from 0.35cm to 14.93cm; and the hydrophilicity of modified polyester fabric did not decrease in the storage and washing process. SEM showed there were more grooves on the surface of the fibers.And there was sulfo group on the fabric according to infrared spectroscopic analysis. Besides, X-ray showed the crystal texture changed little. And the strength, elasticity and rigidity of ionized polyester were kept well. The result showed ionized method on polyester fabric was potential applied technology.

Key words: polyester fabric, ionization, hydrophilicity, sulfo group