An unitary stratified composite composed of a first stratum and a second stratum integrally connected by a transition zone is disclosed. The first stratum serves as a liquid acquisition stratum that rapidly acquires and then transfers liquid to the second stratum. The second stratum serves to withdraw...http://www.google.com.au/patents/US7465373?utm_source=gb-gplus-sharePatent US7465373 - Unitary stratified composite
