Thursday, 10 April 2014 08:02

DRYER - CleanWeave – a clean affair Featured

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Dryer fabrics line is being further expanded

2014-04-10 080541

Dryer fabrics are an integral part of the drying process. Their constant performance is crucial for the paper machine efficiency. In the harsh environment of a paper machine dryer fabrics often get blocked by stickies and dirt which hinder the paper drying process. The ideal fabric stays clean by utilizing a structure with a minimum thread crossing points and no hidden areas where contamination can become trapped.

2014-04-10 080735Computer simulation and practical test. Voith has taken on a pioneering role in the analysis of fabric structures. With the aid of advanced computer simulations, it is now possible to analyze and understand a fabrics effect on the drying process. Based on these findings, it is possible to develop fabrics which have maximum open channels and minimum trapped areas to enhance moisture evaporation throughout the fabrics service life. This process was for the first time successfully applied in the development of Evaporite and EvaporiteHigh. Evaporite and EvaporiteHigh are stable, hard-wearing fabrics and are easy to clean. Common to both is the new industry low hidden areas within the fabric. The patented structure minimizes the amount of dirt to become trapped thus retaining the fabrics level of air permeability during its entire service life.

Evaporite and EvaporiteHigh are developed primarily for the use in packaging paper machines. Evaporite is designed to run on single tier positions or sections where lower permeabilities are required. EvaporiteHigh has an open structure suitable for applications where higher air flows or evaporation is desired.

2014-04-10 081136Stable and abrasion-resistant. The yarn material used in CleanWeave is SynStron. It was developed by Voith to resist fibrillation at a high abrasion-resistance level. Material fibrillation is known to be a magnet for attracting contamination to the yarn surface. The new Synstron material resists fibrillation and so contributes to the CleanWeave cleanliness and performance. Thus retaining the fabrics high capacity to evaporate moisture and effectively control the sheet through the dryer sections.
More than 200 Evaporite fabrics sold and used in the field show that the fabrics collect less contamination and are therefore more permeable to air than competing fabrics with a multi-layer structure. The new product line is being further expanded. CleanWeave will soon be offered for all paper grades.//
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