Method for manufacturing a composite pressurized-fluid vessel

A method for manufacturing a composite pressurized-fluid vessel comprising:

• winding a first polyolefin resin-based tape thereby forming a first layer of the vessel,
• depositing an intermediate second layer on the first layer, consisting of a material having variable permeability properties depending on the temperature and permeability below a pre-determined temperature threshold and non-permeability above the temperature threshold,
• winding a second resin-based tape on the intermediate second layer thereby forming a third layer, and
• cooling the intermediate second layer to a temperature below the temperature threshold while the first and third layers are each kept at a temperature above the melting temperature of their resin,
• wherein the tape forming the third layer is based on a different resin from the first layer and
• wherein, during the step of depositing the intermediate second layer and during the step of winding the second tape, the intermediate second layer is kept at a temperature above the temperature threshold.