This module begins with a description of the objectives of the wet pressing process on a paper machine. Then, it discusses how water is removed from the sheet in press roll nips. It explains the purpose of a wet felt in wet pressing and how wet felts are designed. This module will give you a better understanding of how water is removed from the sheet during the wet pressing process.
•Describe the three objectives of wet pressing
•Identify and describe the pressing phases in a press nip
•Identify the key process and equipment variables that impact wet pressing
•Identify the sheet properties impacted by wet pressing
•Explain how to minimize sheet rewetting
•Describe the purpose and design of wet felts
•Explain how uhle boxes aid in water removal at the press
•Explain how steam boxes aid in water removal at the press
•Describe the types of rolls used in wet presses
