Absorbent structure in an absorbent article such as a diaper, pant diaper, incontinence guard, sanitary napkin, wound dressing, bed protection etc. and comprising a compressed foam material (1) which expands upon wetting, at which the foam material (1) comprises at least two integrated layers (2,3,4)...http://www.google.com/patents/US8143472?utm_source=gb-gplus-sharePatent US8143472 - Absorbent structure in an absorbent article and a method of producing it
