LAMINATE AND STANDING POUCH

To provide a laminate for highly durable packaging material, which has a gas barrier property, can be applied to a packaging material required to have content resistance to content that strongly attacks the packaging material, and when the laminate is used for a standing pouch, prevents the content from permeating to a base material layer side even if a crack occurs in a metal layer due to bending of a bottom material, so that leakage of the content does not occur.SOLUTION: A laminate for highly durable packaging material for a packaging bag includes a base material layer, an adhesion layer A, a metal layer, an adhesion layer B, and a thermoplastic resin layer laminated in this order from a surface layer side. The adhesion layers A and B are fused co-extruded layers at least containing acid-modified polyolefin. The laminate has a valley fold starting from an outer side at least at one location.SELECTED DRAWING: Figure 1 【課題】ガスバリア性を有し、包材へのアタックが強い内容物に対して、耐内容物性が求められる包材に適用でき、また、積層体をスタンディングパウチに用いた際に、底材の屈曲により金属層にクラックが生じても、内容物が基材層側へ浸透せず、内容物の漏れが生じない高耐性包材用積層体を提供すること。【解決手段】表層側から、基材層、接着層Ａ、金属層、接着層Ｂ、熱可塑性樹脂層がこの順に積層され、前記接着層ＡおよびＢが少なくとも酸変性ポリオレフィンを含む溶融共押出層であり、少なくとも１ヵ所に外側を起点とした谷折加工を有する包装袋用の高耐性包材用積層体である。【選択図】図１