PROBLEM TO BE SOLVED: To provide a moist and heat sterilization method of containers which is excellent in transparency, heat endurance and cleanness.SOLUTION: The moist and heat sterilization method for products whose contents are hermetically packed in a container made of ethylene resin satisfying the following requirements (a) and (b) includes a sterilization step and a cooling step. After the sterilization step has sterilized the container at 116-126°C, the cooling step cools the product with coolant of 10-30°C. (a) In accordance with JIS K7151, the maximum value of the scattering intensity does not appear on the scattering intensity distribution curve at the azimuth angle of 45 degrees that a compression molded test piece with compression thickness of 100 μm is obtained by Hv light scattering measurement. (b) The residual crystallinity at 121°C as determined from the DSC endothermic curve is 20% or more.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2019,JPO&INPIT【課題】 透明性、耐熱性、クリーン性に優れる容器の湿熱滅菌方法を提供する。【解決手段】 下記(イ)、(ロ)の要件を満足するエチレン系樹脂よりなる容器に内容物が密閉充填された製品の湿熱滅菌方法であって、滅菌工程および冷却工程を含み、前記滅菌工程として、116~126℃で前記容器を滅菌した後、前記冷却工程として10~30℃の冷媒で前記製品を冷却することを特徴とする湿熱滅菌方法。(イ)JIS K7151に準拠し、圧縮成形した厚み100μmの圧縮成形試験片がHv光散乱測定にて得られる方位角45度での散乱強度分布曲線において、散乱強度の極大値が現れない(ロ)DSC吸熱曲線より求めた121℃での残存結晶化度が20%以上【選択図】 図2
