A multiple layer sheet structure has oriented layers of nylon and EVOH. Additional layers may or may not be utilized, and may or may not be oriented. Where additional layers are used, one of the additional layers, on the exterior surface of the structure, is preferably heat sealable. The structure shows...http://www.google.es/patents/US4640852?utm_source=gb-gplus-sharePatente US4640852 - Multiple layer films containing oriented layers of nylon and ethylene vinyl alcohol copolymer
Multiple layer films containing oriented layers of nylon and ethylene vinyl ...
