Abstract: The technical field of the invention is that of manufacturing boxes or cases or other packaging volumes which are foldable so as to be transportable in a minimum amount of space when empty: the present invention relates to such rectangular boxes comprising a base, four side faces of held thereon by a rim with two opposite ones of said faces being interconnected by foldable side elements enabling said two walls, when disconnected from the base, to be pressed one against the other, and a lid panel covering and holding said side faces remotely from the base; the two said interconnected faces are rigid insulating panels, the two lateral elements interconnecting them are belt portions, and the other two opposite faces are likewise insulating panels that are independent and that slide between the two first faces and against said belts when they are unfolded.

Abstract: Modular insulating upholstery for a closed chamber (7) consisting of panels (1, 2) and prefabricated elements, specially suited to chambers for the transport of goods such as containers. The panels and prefabricated elements form part of an assembly set or kit adaptable to the dimensions of the chamber interior (7) to be insulated and comprise all the necessary upholstering elements. The panels (1) covering the chamber peripheral walls and ceiling consist of a self-supporting sheer insulator in one piece. The prefabricated elements essentially comprise spacing units (6) in the form of small blocks, which are placed between the inner chamber surface and at least the outer panel surfaces, and are made of a material capable of breaking any thermal conduction between the two surfaces.