The Influence of Pretreatment and Usage on the Humidity Control Property of a Novel Paperboard

Adsorption-desorption behavior of a novel humidity control paperboard was investigated on the conditions of different pretreatments and variable amounts of usage. The results revealed that the target humidity varied because of different moisture contents. In addition, the target relative humidity was about 50% with the moisture content being about 20%. The humidity control performance of the paperboard could be measured with initial 80% of relative humidity. The dosage ratio of sample to container is 1g/L. On the condition that the moisture content was 20%, when the usage ratio was less than 1, the target relative humidity decreased with the increasing ratio. Yet the target humidity of micro-environment changed little and the adsorption-desorption rate varied dramatically. Knowing the humidity control behavior of the composite paperboard is important for its application.