Paper is made of vegetal fibres (cellulose) and is intrinsically hygroscopic, which means that it is more susceptible to changes in relative humidity than temperature. The water content of paper reaches equilibrium at conditions that depend on the temperature and the relative humidity in the surrounding environment.
Optimal humidity levels in paper manufacture avoids paper curl, static build-up and, at the same time, reduce spoilage and dust.
The control of the ambient conditions also prevents damage due to the electrostatic charges that are produced by the rubbing together of the sheets and that increase in intensity as the air humidity decreases.
Moreover, humidity control will help provide consistent quality in the production, as well as a pleasant working climate to staff.
The recommend temperature and humidity for paper manufacturing is 20°C with a relative humidity from 50-60%.
humiSteam and gaSteam are popular choices when considering steam, however humiFog and MCmultizone water spray systems offer potential energy savings on large production facilities.