There are two types of pulp used, namely mechanical pulp and kraft pulp. The two pulps are combined in various concentrations, dependent on the type of paper being produced, and pumped into a head box at the beginning of the paper machine. At this stage the pulp is approximately 99% water. From the head box, the pulp is ‘jetted’ onto a fast moving polyester mesh. The water is forced through the polyester mesh, while the solid component of the pulp remains on the surface. This is the first stage of the process, taking place in the area of the paper machine referred to as the former.

The pulp then moves into the press section, where the water is squeezed out through the paper machine felts, which are large piece of continuous fabric similar in texture to carpet. The felts are supported by a series of rollers, which move the felts around at a very fast speed. It is the three felts in this section of the paper machine around which the felt change scheduling model has been based.

The run of paper leaves the press section to progress through the dryer section where it passes over approximately 50 steam-heated cylinders to further reduce the moisture content. The finished paper is then cut into manageable sizes on the winder and packaged for distribution.

Anna
Sales Department
Hebei Defeng Polyester Fiber Co., Ltd
Add: Jingjiu Railway west, wugong town, Raoyang County
TEL: 86-311-67699480
FAX: 86-311-67699480
Website: www.china-polyestermesh.com. 
E-mail:anna@china-polyestermesh.com

Tag: polyester mesh, paper machine felts