FOOD PACKAGING FILM AND FOOD PACKAGING BODY

To provide a food packaging film having small thickness unevenness and improved water vapor barrier property.SOLUTION: A food packaging film is a film used for packaging food, and comprises a uniaxially or biaxially stretched film layer constituted of a propylene-based polymer composition containing a propylene-based polymer and a tackifier. The food packaging film has a heat absorption peak A observed within a range of 150°C to 180°C in a DSC curve 2 obtained by a second differential scanning calorimetry, and also has a calorific value of the heat absorption peak A of 80-120 J/g when a first differential scanning calorimetry (1-st. Run) and the second differential scanning calorimetry (2-nd. Run) are sequentially executed to the stretched film layer using a differential scanning calorimeter, where the first differential scanning calorimetry comprises the steps of: raising temperature from -50°C to 250°C at a temperature raising rate of 10°C/min.; maintaining the temperature in an isothermal state at 250°C for 10 minutes; and lowering the temperature from 250°C to -50°C at a temperature lowering rate of 10°C/min., and the second differential scanning calorimetry comprises the step of raising the temperature from -50°C to 250°C at the temperature raising rate of 10°C/min.SELECTED DRAWING: Figure 1 【課題】厚みムラが小さく、水蒸気バリア性が向上した食品用包装フィルムを提供する。【解決手段】食品を包装するためのフィルムであって、プロピレン系重合体および粘着付与剤を含むプロピレン重合体組成物により構成された一軸または二軸延伸フィルム層を備え、上記延伸フィルム層に対して、示差走査熱量計を用いて、昇温速度１０℃／分で−５０℃から２５０℃まで昇温する過程と、２５０℃で１０分間保つ等温過程と、降温速度１０℃／分で２５０℃から−５０℃まで降温する過程とからなる一回目の示差走査熱量測定（１ｓｔＲｕｎ）と、昇温速度１０℃／分で−５０℃から２５０℃まで昇温する過程からなる二回目の示差走査熱量測定（２ｎｄＲｕｎ）と、を続けて行ったとき、上記二回目の示差走査熱量測定により得られたＤＳＣ曲線２において、１５０℃以上１８０℃以下の範囲に吸熱ピークＡが観察され、上記吸熱ピークＡの熱量が８０Ｊ／ｇ以上１２０Ｊ／ｇ以下である食品用包装フィルム。【選択図】図１