Customer: Asia Paper Manufacturing at Sihwa Mill in the Republic of Korea
Production: Kraft paper, gypsum linerboards and testliner
Supplier: Valmet
Description: Valmet will supply a new sizing section with a hard nip sizer to Asia Paper Manufacturing at Sihwa Mill in the Republic of Korea.
Details: 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 fiber. This leads into better strength properties.
The 5,900-mm-wide (wire) PM1 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.
Start-up: for the second half of 2021.