PKSC 4300: Drying Exam
1. Drying is the process of the from a coating, ink, or in
a controlled way.: evaporating, solvent, adhesive
2. What two things are involved in drying?: 1) heat transfer: warming the coating to help speed
up diffusion
2) mass transfer: evaporating away the solvent
3. Why is drying performed?: FDA requires that there is low odors retained from the dry polymer
4. Boundary layer is the layer of that with the web: air, travels
5. Impingement velocity is the at which drying air on the web: -
speed, blows
6. What is the drying process?: 1) heat and air is applied to the web
2) solvent evaporates from the surface
3) evaporated solvent is removed from the surface
4) solvent within the coating travels to the surface
7. Describe why the change in mass transfer affect drying?: the mass transfer coeflcient
1. Drying is the process of the from a coating, ink, or in
a controlled way.: evaporating, solvent, adhesive
2. What two things are involved in drying?: 1) heat transfer: warming the coating to help speed
up diffusion
2) mass transfer: evaporating away the solvent
3. Why is drying performed?: FDA requires that there is low odors retained from the dry polymer
4. Boundary layer is the layer of that with the web: air, travels
5. Impingement velocity is the at which drying air on the web: -
speed, blows
6. What is the drying process?: 1) heat and air is applied to the web
2) solvent evaporates from the surface
3) evaporated solvent is removed from the surface
4) solvent within the coating travels to the surface
7. Describe why the change in mass transfer affect drying?: the mass transfer coeflcient
