Patent ID: 7569618

Claim:
An absorbent article comprising surface cross-linked superabsorbent polymer particles, said superabsorbent polymer particles being made by a method comprising the steps of: a) providing superabsorbent polymer particles and providing radical former molecules applied onto said superabsorbent polymer particles; b) providing a reactor comprising a drum, said drum having a longitudinal axis and further having a cross-section, wherein an irradiation source is provided such that the radiation emitted by the irradiation source is able to reach superabsorbent polymer particles within said drum, said irradiation source being able to emit UV radiation of a wavelength between about 201 nm and about 400 nm; c) feeding said superabsorbent polymer particles with said radical former molecules added thereon into said drum; d) moving said superabsorbent polymer particles with said radical former molecules added thereon in said drum by rotating said drum around its longitudinal axis; e) said superabsorbent polymer particles with said radical former molecules added thereon being irradiated by said irradiation source as said superabsorbent polymer particles are moved within said drum; and f) collecting said superabsorbent polymer particles leaving said drum.