Surface cross-linking method of the water absorbent resin particles using vacuum UV

摘要

The present invention relates to a method for surface crosslinking water-absorbing resin particles using UV irradiation. This method is carried out with a radiation source and the hollow drum, a so-called drum reactor. The longitudinal axis and the drum has a cross-section. Is supplied to the drum to rotate about the longitudinal axis, the water-absorbing resin particles is irradiated while moving in the drum. Radiation emitted from a radiation source such as may to reach the water-absorbent resin particles in the drum, and a radiation source. Radiation source used in the method of the present invention, can generate ultraviolet light having a wavelength of 100~200nm.