Abstract: Provided is a lid material for a press-through pack package, comprising a heat-seal layer composed of a heat-sealing agent and a lid material film, wherein the heat-sealing agent contains an adhesive resin having a ratio E1/E2 of a storage elastic modulus at 30° C. E1 to a storage elastic modulus at 60° C. E2 of from 4.0 to 20.0 and a ratio E2/E3 of E2 to a storage elastic modulus at 80° C. E3 of from 1.3 to 4.0. Also provided is a lid material for a press-through pack package, comprising a heat-seal layer composed of a heat-sealing agent and a lid material film, wherein the heat-sealing agent contains an adhesive resin having a melting point of from 40° C. to lower than 90° C.

Abstract: A stretched laminated film and bag is provided, in which a packaging operation in thermal shrinkage packaging is effectively performed without the occurrence of fusion and the like between margins when sealing via heat-sealing with a margin portion of an adjacent bag in a layered state, and without of bag whitening in a thermal shrinkage process thereafter. Specifically, a stretched laminated film has at least four layers of: a surface layer (A), an adhesive layer (A), a barrier layer, and a surface layer (B) sequentially laminated in order thereof, in which the melting temperature of the surface layer (A) is only increased no less than 65° C. to no more than 150° C. higher than the melting temperature of the surface layer (B), and the barrier layer is composed of a vinylidene chloride copolymer, and the melting temperature of the barrier layer is no less than 130° C. to less than 160° C.