Huatao has developed a wide range of spiral dryer screens to meet each client's needs helping to reduce operating costs through energy-efficient solutions. Spiral dryer screen also called spiral link dryer fabric or SLDF, spiral dryer screen is assembled with spiral flat yarn loops linked by a pin yarn inserted in the adjacent holes.
Excellent materials are adopted to make the spiral fabric to protect against hydrolysis and high-temperature conditions.
The flat yarn spiral dryer screen is composed of flat wire, and the surface dryer screen is smooth, depending on the filling yarn added to the spiral dryer screen, air permeability range from 100 to 1380 CFM.
With its flexible and adjustable permeability and perfect surface, the paper breaking caused by airflow disturbance is greatly reduced, thus improving the production efficiency of the paper machine, the flat yarn spiral dryer screen is mainly used for the high speed paper machine which required high grade of paper.
The selection of dryer screen is depending on the various paper machine parameters such as paper grades, dryer cylinder configuration, dryer cylinder temperatures, air balance in the hood, etc. Dryer screen design and materials are also very important.
For a particular paper machine, the permeability, design, and materials of the dryer screen should be adapted to make sure optimum drying from a drying section. The air permeability of the dryer screen has a great impact on the rate of evaporation of water. If the permeability is decreased, then it is a reduction in the drying capacity of the dryer screen.
The dryer screen, whose air permeability range between 700-1000cfm is used on the paper machine for producing higher gsm Kraft and board varieties. On the other hand 100-400cfm dryer screen is widely used in medium and high speed paper machines, high numbers of contact areas with the drying surface ensure uniform drying.
Proper choice of dryer clothing improves paper machine runnability, increased drying rate, improved paper quality, and saves energy.
Moreover, the dryer screen/fabric/canvas should have the following parameters or characteristics: Aerodynamic Properties, Heat Transfer, Fabric Tension, Sheet Support, caliper, heat resistance, wet-resistant, and should be less elongated at heat, durability, silent drive, easy to operation, etc.
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