Pitch Control

Chemical Pulp

Pitch is a general term describing extractable organic compounds found in wood. These compounds can affect both productivity (downtime cleaning) and pulp quality (dirt counts). We have developed a range of Fennodispo and Fennosorb solutions that can improve pitch elimination in the digestor and at the brown stock washing stage, or render pitch harmless later in the process. Using our unique NetFloc technology, pitch can also be removed from specific points of the process.

Mechanical Pulp

Pitch may cause problems in mechanical pulp mills by generating shutdown time (filled refiner plates) or impacting on paper characteristics like scott bond or tensile srength at the paper machine. Often, pitch also generates deposits at the paper machine and reduces its efficiency. We have long experience of handling pitch in mechanical pulp. Our specific solutions offering depends on the objectives of the mill and the method used at the mill, and includes treatments for enhancing the deresination at the wash presses as well as passivation and dispersing treatments followed by optimum fixation.

Packaging & Board

Pitch and sizing components may generate troublesome deposits on foils, rolls and felts. We have developed a range of solutions that can help achieve the smooth, efficient running of the machine. Food-packaging grades suffering of odor problems caused by hexanal from wood-derived fatty acids are also in our focus.

Printing & Writing

Pitch and sizing components may generate troublesome deposits on foils, rolls and felts, or can reduce paper strength and cause speck and holes. We have developed a range of solutions that help to control these unwelcome side-effects both in the incoming pulps as well as in the wet-end of the paper machine. Special knowhow is found on the advanced methods to monitor the wet-end agglomeration and to analyze pitch components in detail.

Recycled Fiber

When both recycled fibers and mechanical pulps have been processed using the same machine, specific deposition problems may appear after both furnishes have been mixed. We have solutions for this problem. Once micro-stickies are transferred to the machine, they may also create specific problems by re-agglomerating and generating spots, deposits and breaks in the paper. Specific programs can be designed to reduce these problems, for example stock treatment, clothing passivation and cleaning procedures.

Tissue

Pitch can generate troublesome deposits on foils, rolls and felts, or reduce paper strength. We have developed a range of solutions that help control these unwelcome side effects.