Calendering temperature distribution

The surface of the covers must be as smooth as possible, the wear resistance excellent These properties can be influenced for instance by the modulus of the fibers, particle size distribution and hardness combinations of the fillers and, to a minor extent by the properties of the resin. Temperature resistance and low heat build up of the cover under dynamic load is mainly a function of the resin matrix system. Operating conditions of calenders such as 25 Hz load frequency, 90 °C surface temperature and 50 MPa nip pressure as well as expected load cycles of >10 make the elastic calender covers the most demanding applications of roll covers. Figure 5.13 shows an elastic composite cover in a multi-nip calender. 

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