Abstract: The present disclosure relates to a bag system for peritoneal dialysis, including a solution bag and a drainage bag which are fluidically connected to each other (e.g., via a three-way valve), wherein the solution bag and the drainage bag each comprise one side formed by a folded-over film on which at least one connection is arranged using butt welding. The present disclosure further relates to a method for producing a bag system of this type.

Abstract: Multi-layer gas barrier film for containing medical fluids, comprising an inner film having a first and a second surface, the first surface being in contact with the fluid and the second surface being in contact with a first adhesion agent, a middle film having a third and a fourth surface, the third surface being in contact with the first adhesion agent and the fourth surface being in contact with a second adhesion agent, an outer film having a fifth and sixth surface, the fifth surface being in contact with the second adhesion agent, where the inner film comprises an olefinic polymer having a glass transition point of less than 10° C. and a melting point of above 130° C., where the middle film has a polymer having an ester bond and a glass transition point of above 35° C. and a melting point above 150° C., and the middle film comprises an inorganic gas barrier material, and where the outer film comprises a polymer having an amide bond.