PACKAGING MATERIAL AND PACKAGING BAG FOR INFUSION BAG

To provide a packaging material which is laminated by extrusion lamination, in which even when the film thickness and processing temperature of a sand resin are set to be high, the low-density polyethylene which is the sand resin is hard to be deteriorated by heat and hard to cause cohesion failure of the polyethylene when sealing.SOLUTION: A packaging material having at least a substrate 11, a light-shielding layer 13 formed of an aluminum vapor-deposited film, and a sealant layer 15. The degree of oxidation of sandwich lamination resins 12 and 14, in which the layers are bonded together, is 0.5% or more and 2.1% or less, expressed in terms of the O (oxygen)/C (carbon) ratio (%) by elemental analysis by means of X-ray photoelectron spectroscopy.SELECTED DRAWING: Figure 1 【課題】押出ラミネートで貼り合せた包装材料において、サンド樹脂の膜厚や加工温度を高めに設定した場合でも、サンド樹脂である低密度ポリエチレンが熱劣化し難く、シールする際にポリエチレンの凝集破壊を引き起こし難い包装材料を提供する。【解決手段】少なくとも基材１１と、アルミ蒸着フィルムからなる遮光層１３と、シーラント層１５とを有する包装材料であって、前記各層を貼り合せているサンドイッチラミネーション用樹脂１２、１４の酸化度が、Ｘ線光電子分光法での元素分析によるＯ（酸素）／Ｃ（炭素）比（％）で表したきに０．５％以上２．１％以下である。【選択図】図１