TRANSFUSION VESSEL HAVING GAS BARRIER PROPERTY

摘要

PROBLEM TO BE SOLVED: To enable long-term preservation by immediately restoring the bas barrier property of a vessel wall even after the vessel itself is subjected to an autoclave sterilization treatment. SOLUTION: The transfusion vessel 1 having the bas barrier property consists of a resin vessel having the flexible wall formed with at least a discharge port 2. The vessel wall is divided to an inside layer and an outside layer with an intermediate layer consisting of polyvinyl alcohol as a boundary and is thus formed as multiple layers. The innermost layer is a polyolefin layer having a thickness in the range of 50 to 800μm and is provided with the outside layer in such a manner that the moisture permeation rate So (g/m<2> 24hrs:40 deg.C, 90% RH) of the outer layer attains >=2 times the moisture permeation rate Si (g/m<2> 24 hrs:40 deg.C, 90% RH) of the inner layer.