Absorbent articles comprising surface cross-linked...

C - Chemistry – Metallurgy – 08 – J

Patent

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Details

C08J 3/24 (2006.01) A61L 15/22 (2006.01) B29C 35/08 (2006.01) C08J 3/28 (2006.01)

Patent

CA 2620643

The present invention relates to absorbent articles comprising surface cross- linked superabsorbent polymer (SAP) particles, the SAP particles being made by a method using UV irradiation. The method is carried out in a so-called drum reactor, which comprises a hollow drum and an irradiation source. The drum has a longitudinal axis and a cross-section. Superabsorbent polymer particles are fed into the drum and are irradiated while they move within the drum, which is rotated around its longitudinal axis. The irradiation source is provided such that the radiation emitted by the irradiation source is able to reach superabsorbent polymer particles within said drum. The irradiation source for use in the method of the present invention is able to emit UV radiation of a wavelength between 100 nm and 200 nm.

La présente invention concerne des articles absorbants comprenant des particules polymériques superabsorbantes réticulées produites selon un procédé dans lequel est utilisé un rayonnement ultraviolet extrême. Ce procédé est mis en oeuvre dans un réacteur communément appelé réacteur à tambour, composé d'un tambour creux et d'une source de rayonnement. Ce tambour possède un axe longitudinal et une section transversale. Le procédé consiste à introduire des particules polymériques superabsorbantes à l'intérieur du tambour et à les soumettre à un rayonnement au fur et à mesure que les particules se déplacent à l'intérieur du tambour, le tambour tournant autour de son axe longitudinal. La source de rayonnement est utilisée de façon que le rayonnement émis atteigne les particules polymériques superabsorbantes à l'intérieur du tambour. La source de rayonnement utilisée dans le procédé de la présente invention est capable d'émettre un rayonnement UV d'une longueur d'onde comprise entre 100 nm et 200 nm.

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