Discusses the fundamentals of colloidal chemistry for paper machine stock and water systems. Describes the surface charge interactions that take place and the role of pH. Discusses how some commonly used chemicals affect wet end chemistry, machine operations, and sheet characteristics.
•Identify the three major classes of furnish components
•Define and describe a "colloid"
•Describe two ways to measure charge
•Describe the effect of furnish surface area on additive uptake
•Describe coagulation and flocculation
•Identify the sources of anionic trash and describe its effect on the system
•Explain why water plays a large role in papermaking
•Describe the pH Scale
•Explain why pH control is important
•Describe the two classes of papermaking additives
•Identify common chemical additives and their purpose
•State the importance of wet end chemistry control
