... layer multilayer Meterial :PE.PP.PA.EVOH.TIE. meat vacuum packaging bags /pouchesStructure:5 / 7 coextrusion layer multilayerMeterial :PE.PP ... .PA.EVOH.TIE. Vacuum bag is used for rice ,meat, ... on.they have strong sealing performance,high strength,rigid packaging. Vacuum bag: Structure:5 / 7 coextrusion layer multilayerMeterial :PE ...