What is a retention and drainage aid system?

A retention and drainage aid system was proposed by a competition company for trial on a paper board machine. The incumbent system was a microparticle system supplied by ACAT. The proposed system was based on very high molecular weight anionic and cationic polyacrylamides.

What are the advantages of cation drainage retention agents?

Improve retention of the fiber, fine, and filler in wide pH range (from acidic paper to alkaline paper). Improve runnability and productivity by enhancing drainage in the forming section. High cation drainage retention agent. Lower viscosity than general drainage retention agents.

What are retention aids & how do they work?

Retention aids improve drainage and increase retention of fine particles. They function as both productivity aids and product improvement since they increase speed and increase fines retention. They improve the clarity of the waste water and greatly reduce the negative environmental impact of water reuse.

Does retstar 201p increase retention & drainage on the paper machine?

The overall conclusion was that the combination of RetStar®201P, MicroStar® 2400L and BentStar® S190, together with optimization of the addition sequence increased retention and drainage on the paper machine and resulted in a substantial reduction in treatment costs. RETENTION AND DRAINAGE AIDS – From Laboratory Testing to the Real World!

What are the limitations of free drainage testing?

The limitations of the free drainage testing become apparent as you continue to increase the dosages beyond those normally used on the machine. For all retention and drainage aid systems the time taken for a fixed volume of backwater to collect becomes lower and lower as the dosages are increased. See the graph above.