ABSORBENT POLYMER STRUCTURE PROVIDED WITH AN IMPROVED RETENTION CAPACITY AND PERMEABILITY

摘要

The invention relates to a method for producing an absorbent polymer structure (Pa) by treating the outer region of a non-treated absorbent polymer structure (Pu1), said method comprising the following steps: the outer region of the non-treated, absorbent polymer structure (Pu1) is brought into contact with an aqueous solution containing at least one chemical cross-linking agent and at least one inorganic compound in a colloidal form; and the absorbent polymer structure having an outer region which has been brought into contact with the aqueous solution is heated to a temperature of between 40 and 300 DEG C, such that the outer region of the absorbent polymer structure is more cross-linked than the inner region, and that the inorganic compound is at least partially immobilised in the outer region of the absorbent polymer structure.