Moisture absorbent unit and semi-sealed container

摘要: A moisture-absorbent unit capable of sufficiently restricting condensation inside a semi-sealed container that can be miniaturized and whose interior is at comparatively high humidity, when this undergoes sharp temperature drop from being placed in low-temperature environment, to provide having the unit. used container, characterized porous material for which difference moisture absorption, obtained by subtracting absorption relative humidity 85% 95%, 15% mass or more before absorption.