METHOD FOR MANUFACTURING AN AIRTIGHT LAYER USED IN THE COMPOSITION OF A TIRE

A method for manufacturing a composite airtight layer () used in the composition of a tire () comprises: a film () made of thermoplastic material is heated such that the film is able to plastically deform; the film is deformed () with the aid of corrugating means, the thickness of the film () being in a range from 0.01 to 0.2 mm, and the film having corrugations with a pitch and amplitude chosen in a range from 0.1 to 10 mm so as to give the film a given elongation capacity; the film is cooled such that the corrugated film is no longer able to be plastically deformed; and the corrugated film is coated in a matrix () of elastomer material, so as to form a composite airtight layer ().