Paper web is formed in the paper making fabric section begins, the network portion of the paper have removed most of the water. When the pulp wet laid on the paper web, which contains about 99% water, the rest of the fiber and possible fillers and additives. The quality of the paper by the paper machine the paper web portion decision. For example, because the distribution of fines and fillers and fiber orientation and basis weight of paper caused by the small amount of change is mainly caused by the paper web portion. 

Indentation can be divided into two categories: drainage indentation indentation and topography. Indentation in the terrain, the paper side surface of the paper making fabric into the wet web copy. Indentation in the drain, the fine powder and paper fibers in the xy direction, distributed unevenly in the paper structure, which results in uneven shape. Drainage indentation depends on the fabric structure of the drainage channels. If the woven structure of the fabric of different sizes are formed uniformly spaced openings, such as diagonal, this pattern will also appear in the paper formed with the fabric. Thus, the paper side surface of the fabric having the same size of the opening is very important, equally important is the machine side of the outlet must have the same dimensions.

Since productivity increasingly demanding, in the past years the speed of the paper machine has become quite high. Today, the maximum design speed of the paper machine over 2000m / min, while the rate of a decade ago, only about 1700m/min. As faster and faster, increasing the amount of water, and the need to partially remove the shorter more water than before. In the latest former structures, by forming tiles and loading foils, the drainage more effective. It also proposed a new paper making fabrics and higher requirements. Drainage device must be distributed as evenly as possible in the fabric to the paper web to minimize creasing. In fact, because the quality of the indentation on the paper's print run has an important impact, indentation choose fabric structure has become the most important criteria. 

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: paper making fabric