The need for retention and drainage aids
Good retention and drainage are key factors which could enhance the productivity and efficiency of the paper mill. Without a effective retention program,fibres,fines and fillers such as calcium carbonate, sizing agents, dyes, OBA, starch etc are not retained on the sheet. They are re-circulated in the white water system causing deposit problems, increase in microbiological growth that lead to sheet breaks and sheet defects. Poor retention of wet additives would also increase chemicals cost. A good retention program will minimise these problems.
A good drainage program will allow mills either to increase machine speed if it is steam limited or reduce steam consumption if it is speed limited. Retention and drainage aids become more critical as mills seek to increase fillers in sheets, use more recycled fibres and increase extent of closure of water system.
A good and well designed retention and drainage program provides the following benefits:
- Increased machine runnability.
- Higher usage of fillers or less expensive fibres.
- Reduced deposits.
- Reduced sheet defects.
- Reduced additives(sizing, OBA, dyes, starch, wet and dry strength) cost.
- Reduced sewer loss.
- Reduced downtime for wash ups.
Amazon Papyrus has a range of retention and drainage aids.
Our team of professionals would work with you to select the most appropriate product, program selection and dosing equipment to meet your specific needs.