Patent ID: 7100768

Claim:
Packaging made of plastic containing content which can be or has been sterilized by contact with a high-temperature thermal sterilizing fluid, the said packaging comprising at least one member ( 16 ) for fluidic communication between the inside and the outside of the said packaging and consisting in a tub ( 2 ) and at least one surround circumscribing an opening and a film ( 18 ) closing the opening, and the peripheral border ( 18 a , 22 a ) of which is constantly connected in sealed fashion to the said surround, the said film ( 18 ) comprising a sheet of a selectively impervious material of which the cutoff threshold from the outside to the inside stops contaminating particles and allows the passage of the thermal sterilizing fluid, the said selectively impervious material being capable of deforming mainly in the plane of the said sheet at the said high temperature, wherein said selectively impervious material has been thermally pretreated by definitively shrinking it in a planar way.