Paper Machine Press Section

The press section also has a major impact on sheet surface properties such as.

Paper machine press section.

In the press section large granite or hard rubber covered rolls are placed in close contact to form a nip. A modern press section should fulfill the following requirements. The second section of the paper machine is the press section which removes much of the remaining water via a system of nips formed by rolls pressing against each other aided by press felts that support the sheet and absorb the pressed water. The task of the paper machine press section is to remove water primarily through wet pressing.

With its latest press section designs and references toscotec has focused on ease of operation and overall plant efficiency. The most important functions of pressing are to increase sheet solid consistency in order to ensure adequate drying capacity to consolidate. Water removal in the press section of paper board and pulp machines has an important influence on machine efficiency and cost. A press section design equation based on the decreasing.

The higher the dry content of the paper web after leaving the press section the less energy has to be expended in subsequent drying. Paper machine press section the main function of the paper machine press section is to continue to remove water from the pulp fibers and to smooth the surface characteristics of the felt and wire sides top and bottom sides of the paper web running the length of the machine. A press section machine removes water or moisture from the wooden pulps to make varied range of paper sheets and boards. The dewatering capacity of a press section and the properties of paper depend on the design and the number of nips.

Paper machine press section represent a key area for rebuilds to improve quality of the paper and energy savings. The risk of web breaks is determined by the general design of press section and the arrangement of open draws if any. The paper web consistency leaving the press section can be above 40. Wet pressing increases sheet dryness in order to ensure adequate paper machine drying capacity and to improve web runnability at the beginning of the dryer section.

A high initial wet strength of the moist paper web after leaving the press also leads to a lower number of breaks especially in the first dryer groups. Paper machine clothing second edition 103 3 pressing the press section is the next part of the paper machine after the forming section. Solutions have been developed on various grades to reduce free draws paper breaks and of course increase. As the paper passes through the nips the water is pressed out of the sheet into press felts that transport and cushion the sheet on its journey through.