Sepac, producing two-ply toilet paper in Mallet with its tissue machine TM 3, has seen its market grow by 8% in Brazil – about twice as much as the tissue market growth overall. As the capacity of the machine was no longer sufficient, Sepac chose the TM 4, designed for 1,800 m/min production speed and equipped with the first Voith steel Yankee cylinder to be installed worldwide. Due to improved ductility and reduced shell thickness, it compares well with a conventional cast iron cylinder, transferring the heat noticeably more efficiently to the paper and lowering steam consumption by up to 6%.

Wood firing. João Ferreira Dias, President of Sepac, also has a wood mill with a managed forest. Since the latter is larger than necessary for the mill, there is enough wood available to heat thermal oil for the tissue production. Voith has thus adapted the technology for the heating and drying hood to this already available resource, so the customer receives another big economic benefit.

Another new technology in the TM 4, which has been running since July 2012, allows the energy consumption of the fan pump to be reduced by 5%. Due to a new design, the head box of the TM 4 is the first one that works without a recirculation line. The latter used to be necessary in order to obtain an optimal CD basis weight profile. Since this recirculation is no longer needed, the corresponding energy requirement is also reduced. //