Abstract: A flexible storage device for packaging particulate solid substances or liquids, having a bottom and lateral walls defining a storage volume, includes: hanging loops toward the top intended for lifting an assembly including: a flexible external wrapper forming at least the four lateral walls of the storage volume, a flexible tubular internal wrapper secured to the four lateral walls of the external wrapper, dividing the storage volume into five vertical compartments including a central compartment defined by the interior volume of the internal wrapper, and four peripheral compartments defined between the lateral walls of the external wrapper and the lateral walls of the internal wrapper. The internal wrapper has an upper edge defining the upper mouth of the central compartment and a lower edge defining the lower mouth of the central compartment. The upper edge of the internal wrapper is at or below the upper edge of the lateral walls.

Abstract: A storage device (1) for bulk material intended for powdery materials, includes a flexible container (2) for bulk material and an insulating inner liner (3), of which the surface resistivity is greater than 1.0×1012?, without a static electricity conductive layer and without a static electricity dissipation layer, the inner lining (3) covering the inner walls of the container, the inner lining (3) including micro-perforations that pass there through, distributed over the whole surface of the inner lining (3) in such a way that the breakdown voltage of the inner liner (3) is lower than 4 kV and the breakdown voltage of the wall of the container is lower than 6 kV.