The paper web formed on the wire part passes into the paper machine press section for dehydration in paper making process. Pressing of the web on the paper machine follows entering of wet web through the nip of two rolls running under pressure. Under the effect of pressure between the two rolls further water removal of paper is obtained and its compactness and strength is increased. The press section is an important part of the paper making process, it’s affect the economy of production and paper quality.
1. Improve the press sheet dryness
2. Ensure that the wet paper web reaches the dryer section by the press section and has good runability
1. Nip pressure: The larger nip pressure, the more water removal. So increasing nip pressure is a good way to remove water.
2. Speed: With the rise of machine speed, drainage time is reduced which reduces drainage. Pressing time is inversely proportional to the machine speed.
3. Temperature: Drainage rate on the press section increase with increasing of press temperature.
4. Roll parameter: Water removal increases with smaller rolls and harder covers but the practical limitations of roll design and paper quality often limit the degree of improvement.
Zhengzhou Leizhan Technology Paper Machinery Company
Office Add: Hetun Industrial Area, Dawei Town, Xinmi City, Henan Province, China
Email: leizhanpulper@gmail.com
Tel: +86 371 55129198
Fax: +86 371 86138029
