Composite material flexible separators for pressure vessels

Method of manufacturing a composite flexible separator for a pressure vessel comprising three adjacent layers of deformable material, namely an outer layer, an inner layer and an intermediate layer which is at least partly impermeable to gases and comprises a metal film, in which method each layer is fabricated separately and said layers are then successively nested inside each other.

Pressure vessel comprising a rigid body and, in said rigid body, a composite flexible diaphragm separator comprising three adjacent layers of deformable material, including an outer layer, an inner layer and an intermediate layer which is at least partly impermeable to gases and comprises a metal film, said metal film of said intermediate layer being at least partially divided into film elements which are least contiguous with each other in a rest configuration of the separator, said flexible separator dividing the interior volume into two separate chambers, said flexible separator having its edge engaged with a support member fastened to said rigid body and holding said edge against the interior surface of the same.