Calendering
Portfolio of Calendering Concepts for All Paper Grades
The calender is essential for final paper quality, smoothing and finishing the sheet under pressure and temperature. By passing through one or more calender roll nips, the paper surface is refined to meet specific production requirements.
We offer calendering solutions for every need: soft or hard nip, single or multiple nips, and calendering on one or both sides. Our concepts ensure the desired surface properties for all paper and board products.
Controlled Sheet Thickness and Improved Surface Roughness
TT Calender-H improves sheet smoothness and ensures precise caliper, making it ideal for downstream processes such as coating. It features two hard-surfaced rolls: a heated roll for uniform temperature and a deflection-compensating roll to provide controllable cross-direction line load.
Key features:
- Cost-effective quality
- Precise nip load and surface temperature adjustment of the heated roll
- Reduced downtime with an easy and fast roll change
- Extended productivity time due to long grinding intervals of rolls
Uniform Density and Enhanced Paper Smoothness
TT Calender-S provides higher smoothness compared to a hard-nip calender, influencing sheet characteristics such as density and printability. This calender consists of two rolls: a heated roll that provides a hot surface and a uniform temperature profile, and a mating deflection-compensation roll for controllable cross-direction (CD) line load. The latter features a soft cover comprised of fiber-reinforced epoxy resins.
Key features:
- Superior quality
- Precise nip load and surface temperature adjustment
Key components
Reliable System for CD Thickness Control
EcoNip corrects thickness variations occurring in the cross-machine direction. In calenders, EcoNip roll types provide uniform forces in the nip between rolls across the entire width of the paper web. An oil-filled pressure chamber within the roll enables deflection compensation for precise profiling of the paper web.
Improved Design for enhanced sheet quality
Voith's Nipco F Roll is a calender's deflection-controlled roll. Its design allows for the most precise calendering process on the market. This equipment is primarily used for specialty paper and high-quality paper.