Metsä High Yield branded Bleached Chemi-Thermo Mechanical Pulp (BCTMP) is used to make our High Yield TENSILE, BULK, and SUPER BULK products. We produce them at Metsä Board’s pulp mills in Kaskinen and Joutseno, Finland, as part of Metsä Group’s operations.
Pulp processing for enhanced paper brightness and stiffness
Metsä High Yield pulp’s high yield, bulk, brightness, and paper technical properties are achieved through the chemi-thermomechanical process, which combines chemical and mechanical pulping. First, the wood chips are treated with chemicals to separate the lignin and fibres. Then, the softened wood chips are ground to maximize fibre recovery. This helps retain the high yield and stiffness compared to traditional chemical pulping methods. The final desired brightness is achieved through bleaching at the end of the process.
Metsä High Yield pulp is used as a raw material in specialty paper manufacturing to achieve higher stiffness and brightness.