Pressing is a much less expensive way than steam heating to remove water from the paper web. Consequently, the pressing process on paper machines is being extensively developed. For example, high-temperature pressing (also called impulse drying) is gaining in popularity because it produces a dryer paper web and can improve paper quality as well.

Typically, in the press section as in the forming section, water is the problem; heat is not. However, heated rolls, high-temperature pressing and high speeds will compound lubrication problems. in high-speed paper machines the frictional heat in the large bearings on the press rolls can be high enough to require that large quantities of circulating oil pass through the bearings to dissipate the heat. 

Within the press section, felt rolls carry the felt that absorbs and conveys away the water in the paper web.Therefore, the same oil can be used for felt-role bearings as is used for the press rolls, provided it was correctly selected in the first place.

Coco Qin
Sales Department
Hebei Defeng Polyester Fiber Co., Ltd
Add: Wugong Town West Raoyang County Hebei Province China
TEL: 0086-311-67699480
FAX: 0086-311-67699480
EAMIL: coco@china-polyestermesh.com 
Website: www.china-polyestermesh.com

Tag: press section,dryer paper web