A moisture absorbent is sealed between an elastic material and a moisture-permeable film to thereby provide a dehumidifying material having an elastic layer or bed therein. The dehumidifying material may be used in the fields of packing articles such as precision machines and dehydrated food and of dehumidification...http://www.google.fr/patents/US4749392?utm_source=gb-gplus-shareBrevet US4749392 - Dehumidifying material
