Beijing PFM Screen Co., Ltd

The forming fabric of Paper Machine Clothing (PMC) plays a critical role in dewatering and forming the pulp, supporting the sheet as it is formed, and transporting it to the next press section during the paper-making process. It consists of one or two endless fabric loops. The primary functions of the forming fabric are to allow water removed from the paper to flow through the fabric; to support, hold and form the sheet; and to transport the paper from the headbox to the press section. The top surface of the   forming fabric acts as a filter cloth , forming a base for the fibers to be deposited to form a fiber mat. The geometry of the forming fabric surface contributes to sheet performance, including line marks, linting and sheet smoothness. Better support improves the quality of the fiber mat and the retention of fines, fillers and fibers on the support surface of the mat.   Functions The bottom surface of the formed web contributes to the characteristics of the conveyor belt. Most li

First, the tension of both fabrics must be equal across the width of the machine. Therefore, measure the tension on both the soft side and the drive side. Make sure that the guide lines are as straight as possible. Next, if possible, increase the tension of the forming fabric a little. After that, you can also play with the tension of the jacquard felt. A little slack or a little tighter may be fine. Push the pick-up roll a little deeper into the forming fabric. This increases the load on the still fragile sheets, so be careful with this option. Look at the pickup point from the back of the fabric (machine) with a bright light to see if the pickup roll is being pushed evenly into the fabric over the entire width of the machine. If not, you may have some alignment work to do. Press Felts Check for unexpected speed differences. Some mills run their press felts slightly faster, and some have the same speed setting for both fabrics. In fact, speed differences are very subtle in the jacquar

The   Press Felts   play an important role in the paper web after the forming section, giving it smoothness while transporting it to the drying section. Depending on their position on the paper machine, they can be classified as wet felts, top felts and dryer felts. In addition to removing the most moisture from all press felts, the pick-up felts must pick up delicate sheets from the forming fabric and guide them into the press section. Problems in the pick-up area often result in breakage of the press section. How can you prevent breaks in the press section of your paper machine? As a Press Felts manufacture, I will share with you. Press Felts Increase the moisture content of the felt before the pick-up point. Water will smooth the paper side of the blanket and improve the tackiness of the blanket. The additional water will increase the water pressure in the first press section. This can lead to better dewatering, but if taken to the extreme, it can also lead to pressing - about which