What is PMC?

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.

 

PMC

Functions

The bottom surface of the formed web contributes to the characteristics of the conveyor belt. Most life-reducing wear occurs on the underside of the fabric as it comes in contact with wear-generating elements such as rolls, foils and flat box covers. Machines with high resistance loads require heavy fabrics to withstand the tensile forces and wear on forming plates, foils, vacuum equipment and rolls. Resistance, fabric wear and lifetime are all related. Mechanically, forming fabrics must have:

* Good abrasion resistance

* Good guiding and driving ability

* Resistance to stretching, narrowing, skewing, wrinkling, puckering and creasing

* Resistant to high pressure cleaning sprays

* Ability to clean and knock off sheets

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Define the ideal material and fiber

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What materials are available for the conveyor belt?

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