Patent ID: 7049006

Claim:
A polyamide-based multilayer structure comprising: a first layer ( 1 ) comprising a polyamide P 1 or a blend of a polyamide P 1 and a polyolefin P0 1 having a P 1 polyamide matrix, optionally, a layer ( 2 a ) comprising EVOH; a layer ( 2 ) comprising a blend of a first PA-6/12 copolyamide, containing more PA-6 by weight than PA-12 and a second PA-6/12 copolyamide containing more PA-12 by weight than PA-6; and a layer ( 3 ) comprising a polyamide P 3 , P 1 and P 3 being identical or different, layers ( 1 ), ( 2 ), ( 2 a ) and ( 3 ) being successive and adhering to one another in their respective contact regions.