Patent ID: 6642431
Filing Date: 2003-11-04
Classification: A61F

Abstract:
An absorbent, porous structure (4) comprising:a first absorbent region (19), primarily consisting of a first material, which stands in direct connection with a second absorbent region (20), primarily consisting of a second material that is hydrophilic, wherein the first material is hydrophilic and exhibits a receding wetting angle &thgr;r which is essentially as large as, or smaller than the receding wetting angle &thgr;r of the second material in an un-treated condition, wherein the first material comprises an agent that raises the receding wetting angle &thgr;r of the first material above the value for the receding wetting angle &thgr;r of the second material, the combination of the agent and the first material still being hydrophilic, whereby the receding wetting angle &thgr;r is larger for the first material than for the second material, and whereby liquid transport between the two regions (19, 20) takes place in a direction from the first region (19) to the second region (20) at least when the porous structure (4) is wet.