Membrane device with layer structure

A membrane comprising:

• a flexible membrane section having a first side and a second side, the first side of the membrane section being adapted to be exposed to a process medium or is intended to be exposed to a process medium, the second side of the membrane section comprising a layer structure that comprises at least a first layer and a second layer,
• wherein the first layer having a coefficient of thermal expansion whose value lies between values of the coefficients of thermal expansion of the membrane section and the second layer,
• wherein the second layer, with respect to the process medium or a component of the process medium, has a permeability which is less than a corresponding permeability of the membrane section,
• wherein the first layer is directly or indirectly applied to the membrane section, and
• wherein the second layer is directly or indirectly applied to the first layer.