Leak-tight container comprising a two-layer leak-tight reinforcing strip

A leak-tight container comprising a bag formed of a flexible film made of polymer defining an interior volume and a through-opening, and a leak-tight connection device intended to engage with a complementary connection device of a sterile chamber so as to ensure leak-tight communication between the interior volume of said container and that of the chamber, said connection device comprising a flange to which the bag is bonded, said flange delimiting the through-opening of the bag, wherein the container comprises a two-layer leak-tight reinforcing strip composed of:

• a first layer made of polystyrene compatible with the material of the flange, which comprises at least polyphenylene oxide to allow the reinforcing strip to be directly bonded to the flange, and
• a second reinforcing layer made of a material compatible with that of the bag to allow the reinforcing strip to be directly bonded to the bag, and of greater rigidity than the first layer,
• said reinforcing strip being inserted between the flange and the bag such that the first layer is bonded to the flange and the second reinforcing layer is bonded to the bag.