The Fuction of Calender In Paper Machine
The Fuction of Calender In Paper Machine
Calender belongs to the equipment for modifying paper. Calender is used to improve the smoothness and brightness of the paper surface, making the paper density more compact and the thickness more uniform. Let's learn about this equipment together.
1. Calender is an integral part of paper machine, which is usually installed between dryer and paper roller.
2. The structure of calender is relatively complex, which is composed of three parts: paper conveying, mechanical transmission and equipment electrical control.
3. When the calender works, it adopts the continuous rolling method. After the printed matter enters the paper conveyor belt, it is transferred to the calender belt after hot pressing and pressure. After the calender treatment, a bright surface layer will be formed on the surface. The calender strip is made of stainless steel and annular steel, and has been specially treated.
4. A large number of heat sources will be generated during the calendering process. These heat sources come from the far-infrared heating source installed inside the hot press roll, and the pressure of the press roll is mostly adjusted by electro-hydraulic method. By means of electro-hydraulic pressure regulation, it can meet the requirements of equipment pressure during the calendering process of printed matter.
5. Calender is a supporting equipment for glazing and coating. The products after calendering will not only become very smooth, but also have higher surface brightness than before.
With the continuous upgrading and improvement of papermaking technology, the requirements for paper are more rigorous than before. After hot pressing and pressurization by calender, the paper surface is not only smoother, but also brighter than before, and the paper is thin, and the thickness will not change. Generally, the glossiness of glazing is about 85%, and the glossiness of the paper after calendering can reach more than 95%.
Calender belongs to the equipment for modifying paper. Calender is used to improve the smoothness and brightness of the paper surface, making the paper density more compact and the thickness more uniform. Let's learn about this equipment together.
