| abstract |
The present invention provides a packaging bag that has a low water vapor permeability and is excellent in non-adsorbability. More specifically, the present invention relates to a packaging bag including a bag body and an outlet joined to the bag body, in which the bag body includes, as a forming material, laminates each having at least a substrate layer, a first intermediate layer, and a sealant layer in this order, and has a bag shape formed by sticking the sealant layers to each other, the sealant layers being disposed opposite each other to define an internal side, the outlet is joined by being held between the opposite sealant layers, the first intermediate layer contains a polyethylene-based resin and a modified polyethylene-based resin, and the substrate layer includes a layer containing a fluorine-based resin as a forming material. |