Voith and Wuzhou Special Paper have successfully commissioned the new PM 21 specialty paper machine in Hanchuan, Hubei Province. It is the world’s widest machine for the production of release paper. The machine, supplied entirely by Voith, demonstrates the technology group’s leading role in the field of high-quality specialty papers.
With a working width of 8.100 meters at the reel, the PM 21 produces around 300,000 tons of specialty paper per year with basis weights ranging from 35 to 120 g/sqm – primarily lightweight release base paper.
Release paper is often used in everyday life to protect sticky surfaces, e.g., in separation applications. The base paper must meet specific requirements in terms of tear resistance, tensile strength, transparency, dense sheet structure, and low surface absorbency. It is characterized by a non-stick surface, which is achieved by coating it with silicone.
With the commissioning of PM 21, Voith and Wuzhou are continuing their successful strategic partnership. Within this framework, the two companies have already implemented several projects since 2008 and modernized seven paper machines.
“The PM21 project is the most important result of our cooperation with Voith. It underscores the company’s global leadership position as a full-line supplier,” says Zhao Lei, chairman of Wuzhou Special Paper. “The plant also lays the foundation for our further growth.”
The PM 21 achieves speeds of up to 1,400 meters per minute. A MasterJet Pro F headbox with ModuleJet control and the DuoFormer D II former also make a significant contribution to the performance of the PM 21.
Voith technologies ensure uniform profiles, optimal moisture distribution, and precise fiber orientation. A tandem NipcoFlex shoe press with a steam box increases dryness, reduces energy consumption and improves sheet density. This results in an optimal balance between strength and low basis weight.
The SpeedSizer AT film press ensures smooth surfaces and lower silicone consumption, which also improves reverse-side printability. MCB air dryers, combined with ModulePro nozzle humidifiers and a Sirius winding system with automatic tension control, ensure dimensional stability and prevent waviness.
“With our experience in quality optimization, we continue to support Chinese paper manufacturers in their development,” says Kurt Yu, president of Voith Paper Asia.
