Pitch, occurring from natural resins in virgin pulp, and stickies in recycled paper fibers, pose a major challenge to pulp and paper producers because of their negative influence on papermaking productivity and paper quality. Talc, the traditional solution to pitch control, has recently been deemed to be carcinogenic with ongoing legal cases in the USA. This has given an opportunity for other solutions to be considered by the pulp producers.
Producing recycled paper is difficult due to the glues and impurities left on the paper and packaging collected for recycling. These glues and impurities form 'stickies' that cause interruptions and downtime in the production of new (recycled) paper.
Packaging and tissues machines lose the equivalent of 4% of their output per day due to machine contamination and sheet breaks caused by deposits. They contribute to holes in the sheet, specks and printability issues, in addition to causing machine downtime and cleaning time.
Products in the Cartaspers® range have been designed for the passivation of pitch and stickies in pulping and papermaking operations, to prevent agglomeration and deposition.
Higher yields per hour are made possible thanks to significantly reduced downtime and cleaning time.
Launched in April 2017, Cartaspers® PLH is a cost-effective, highly efficient single product, especially in soft water environments.
Cartaspers® PLH was developed in line with the criteria of “The Archroma Way to a Sustainable World: Safe, efficient, enhanced, it’s our nature”. Cartaspers® PLH is designed for the pulping sector (where high pH values ensure low system hardness), to remove and passivate pitch particles.
Compared to talc powder, the liquid is easier to handle as well as to disperse, and it has consistent quality. Importantly, Cartaspers® PLH does not cause scale deposits in evaporators or contribute to ash content in finished pulp which reduces pulp quality. The negativity around talc continues to increase due to its claimed link to cause cancer. Cartaspers® PLH creates opportunity to move away from talc.
The organic additive performs across all water hardness levels and complies with food contact regulations such as BfR and FDA.
Its performance and cost-saving benefits were verified by two pulp plants in Europe and Latin America, which reported easier application, better performance and significant cost savings compared to alternative deposit control systems.
Cartaspers® PLH liquid is suitable for use with brown stock and can be applied throughout the pulping process, as a washing aid or to passivate remaining particles in finished pulp.
Cartaspers® PLH liquid has no foaming potential which means that washing efficiency is maintained.
With such performance levels, Cartaspers® PLH also allows to use a higher ratio of recycled paper in paper machine systems.
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