Problem Summary

Poor retention, especially ash retention,can cause sheet quality and productivity problems on a Newsprint machine.  Uneven distribution of filler results in formation issues, two-sidedness and poor optical properties that can negatively impact sheet quality and ultimately print quality. Wet end cleanliness (relating to defects) and quality of polymer make down are also critical in achieving high efficiencies.

Newsprint makers have historically relied on retention aids to address these and other problems related to retention. Older, more traditional technologies such as anionic and cationic flocculants provide retention but have some limitations. In particular, there are many Newsprint machines that require the highest quality of polymer in order to avoid issues associated with insoluble polymer particles.

Newer alternatives include inorganic microparticles and organic micropolymers. While these chemistries offered a step change improvement in filler retention and overall chemical efficiency of the wet end, Newsprint makers still demand more. They desire a program that offers an effective balance of retention, drainage, formation, ease of use and cost.

Recommended Solution

Understanding these needs, Hercules developed PerForm® SP Advanced Retention and Drainage Technology. This technology is a program approach providing papermakers the ability to further optimize the performance of their wet end. PerForm® SP combines a series of mechanisms from best-in-class technologies along with a new, structured organic particulate allowing the Newsprint maker ultimate versatility. This approach has proven to be more effective in formation optimisation than other chemistries which allows for the production of quality tons while reducing operating cost.

Key benefits recorded from practical applications of PerForm® SP Advanced Retention and Drainage Technology include:

Provides high levels of drainage with higher retention allowing formation optimisation
Effective in alkaline systems
Controllable, linear response curve for a stable wet end
Effective with anionic or cationic flocculant programs
Compatible with any type of starch being used