Valmet will supply a new sizing section with a hard nip sizer to Asia Paper Manufacturing at Sihwa Mill in the Republic of Korea. The main target for the rebuild of paper machine PM 1 is to increase strength properties of produced container and gypsum board grades. The start-up of the rebuilt paper machine is scheduled for the second half of 2021.
The value of the order will not be disclosed. The total value of an order of this type is typically around Euro 5-10 million.
Valmet's delivery will include an OptiSizer Hard sizer with hard nip and spray application, a TurnFloat web turning device, surface size preparation and supply systems, Valmet DNA machine control and Valmet IQ quality control systems.
Compared to conventional sizer, OptiSizer Hard has a pair of hard covered nip rolls. Starch is sprayed on the nip rolls. In addition to increased surface strength, OptiSizer Hard improves also the internal strength values of produced board. Starch is dosed in the roll nip with higher nip pressure, which increases the density of fibers. This leads into better strength properties.
The 5,900-mm-wide (wire) PM 1 produces testliner and gypsum board grades with a basis weight range of 80–300 g/m2. The design speed of the new parts will be 850 m/min. The daily design capacity will be approximately 1,100 tonnes depending on the produced grade.
Valmet is the leading global developer and supplier of process technologies, automation and services for the pulp, paper and energy industries.
