Chemical additives are used in the papermaking process for many different reasons, and they are often divided into two groups. Functional chemicals directly improve properties of the sheet, while process chemicals affect operations on or near the paper machine. This module covers the second group – process chemicals. It discusses the purpose of some of the more common process additives used on paper and board machines, and describes how they work.
•Describe the composition of papermaking furnishes
•Differentiate between the two classes of papermaking additives
•Describe the composition of "anionic trash"
•Describe the purpose and function of common paper and board machine process additives, including pH control chemicals, charge neutralizers, retention and drainage aids, pitch control additives, biocides, and foam control additives
Industrial Libraries
- Convergence Industrial Maintenance Library
- Convergence Paper Library
- Industrial Premium