Water-absorbing composition and its use

A water-absorbing composition, which comprises a mixture of a water-absorbent resin and an excessive-liquid permeation buffer, wherein the water-absorbent resin is a product obtained by a process including the step of further crosslinking the surface vicinity of a crosslinked polymer having an average particle diameter in the range of 200-600 μm, wherein the ratio of particles having particle diameters smaller than 106 μm in the crosslinked polymer is not more than 5 weight %, with the water-absorbing composition being characterized by having a liquid permeation buffering index of not less than 0.5 and exhibiting an absorption capacity of not less than 30 g/g in absorbent structures under load and an absorption capacity of not less than 40 g/g without load, and further having an average particle diameter in the range of 200-600 μm, wherein the ratio of particles having particle diameters smaller than 106 μm in the water-absorbing composition is not more than 5 weight %, wherein

• said liquid permeation buffering index is calculated by the following formula:
• Liquid permeation buffering index=10/{(weight W1 (g))/(weight (g) of water-absorbing composition)}
• wherein W1 is the weight in grams of a physiological saline solution absorbed by said water-absorbing composition over a period of 60 minutes under a load of 20 g/cm2 (=about 1.9 kPa);
• and
• the conditions for measuring said absorption capacity in absorbent structures under load are that:
• (i) the load is 20 g/cm2 (=about 1.9 kPa);
• (ii) the liquid being absorbed is physiological saline solution;
• and (iii) the absorption quantity is measured over a period of 60 minutes.