there is provided a multilayer structure comprising : a heat - resistant outer layer comprising at least one polymer chosen from a polyester , a polypropylene , and mixtures thereof ; and a sealant inner layer comprising at least one metallocene - catalyzed polyethylene , at least one metallocene - catalyzed polyolefin plastomer , or mixtures thereof . the multilayer structure further comprises between the outer an inner layers , in any possible order , a gas barrier layer comprising at least one polyvinylidene chloride polymer , at least one ethylene vinyl alcohol copolymer , or mixtures thereof , and a layer comprising at least one oriented polypropylene polymer . such a multilayer can be useful for food packaging . there is also provided processes for preparing the multilayer structure .