Tamfelt OY
Full line of paper machine clothing
As a full line supplier, Tamfelt offers solutions for the entire paper machine; services and products form a full service package. Our goal is to help our customers to produce high-quality paper economically and efficiently.
The constantly advancing technology of large and high-speed paper and board machines presents a growing challenge to clothing suppliers. Tamfelt tackles this challenge with the help of focused R&D, professional workforce and innovative approach.
Tamfelt has proven its expertise as a start-up supplier for many demanding, large and high-speed SC-, LWC-, newsprint, fine paper ja board machines. As an example of these is the start-up in fall 2004 of the world's largest machine producing coated packaging board, APP Ningbo PM1 which started up with 100% Tamfelt clothing. Tamfelt fabrics took also part in the start-up of the world's largest newsprint machine Stora Enso Langerbrugge PM4 in spring 2003.
Each position of the paper machine requires a product especially designed for its conditions. Below you can read about the function of our products on the paper machine.
Forming section / forming fabrics
The pulp sprayed on the forming section contains 99% water and 1% fibers and in some cases also fillers or additives. Most of the water is removed on the forming section. A paper web is formed as water flows through the fabric and the fibers stay on top of the fabric. This is a crucial phase, determining many of the most important qualities of the paper. The fabric should also guarantee economic operation of the paper machine. Forming fabrics are woven of plastic yarns.
Tamfelt forming fabrics
Press section / press felts
From the wire section the web is transferred to the press section. The main function of the press section is to remove water by pressing the web between rolls and an endless felt. This increases water pressure and makes the water flow into the felt. The structure of the press felt affects the dry content of the web. A higher dry content improves machine runnability and reduces the need for energy at drying. Felt properties affect printability and other qualities of the paper.
Press felts are made of synthetic fibers by weaving and needling techniques. The Aquaduct felts make an exception; they are produced by a patented non-woven method. The EcoAqua felts are made by combining a woven and a non-woven base fabric.
Tamfelt press felts and fabrics
Press section / shoe press belts
The press sections of new paper and board machines have one or several shoe presses instead of conventional roll presses. The dewatering capacity of a shoe press is essentially higher. This saves energy in paper manufacture. Besides, it improves paper quality and strength.
A shoe press is operated with a belt. The belt functions like a roller jacket, but its elastic and flexible. Shoe press belts - Tambelts - are either smooth or grooved. When more dewatering capacity is needed, the belt is manufactured with grooves. The water transfers into grooves when the paper sheet is pressed. Belts are cast of polyurethane into cylindrical roller jackets. Yarns are used as reinforcement.
Press section / transfer belts
With paper machine speeds exceeding 1500 m/min, fully closed web transfer has become increasingly important. In a closed transfer, a belt replaces one of the paper machine felts. Compared to conventional felts one of the benefits of transfer belts is better runnability, which means fewer breaks. In addition, rewetting of the web can be almost totally eliminated when running at high speeds and with light paper grades.
The basic structure of a transfer belt resembles a conventional felt with the exception that it is impermeable. The surface characteristics of the belt also play an important role. They have to be similar to the characteristics of paper machine center roll: it has to carry the web without fluttering, but also release the paper with the smallest possible draw difference. The transfer belts are made of various types of polymers.
Tamfelt belts
Dryer section / dryer fabrics
On the dryer section, the dry content of the web is further increased by evaporation. The dryer fabric presses the web against the surface of steam-heated drying cylinders. The temperature of the web rises and water is effectively evaporated into and through a porous dryer fabric.
The dryer fabric also helps to support the web as it moves from one cylinder to another and between the dryer groups. Dryer fabrics also transmit drive to undriven cylinders and lead rolls. Dryer fabrics are woven of plastic yarns.
With a carefully chosen clothing paper machine runnability can be substantially improved. Moreover, this also results to enhanced paper quality and energy savings. In order to serve our customers better, we have also nvested in technical support.
Filter fabrics
Efficient drying
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TAMSTAR
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UNISTAR
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TAMDRY
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SILVERSTAR
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SAUNASTAR
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Tamfelt OY
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