Tests at the Voith Paper Technology Center have shown that using newly developed suction roll covers and felts can achieve increases in dry content of up to 1.5 percent.

Tests at the Voith Paper Technology Center in Heidenheim, Germany, and initial field tests at customer sites have shown that using newly developed suction roll covers and felts can achieve increases in dry content of up to 1.5 percent without the need for large investment costs, says the manufacturer.

The technology that Voith applied to the polyurethane roll covers leads to deeper and wider grooves, resulting in shortened flow paths for the extracted water, the company says. This increased capacity enables larger quantities of water to be removed quickly and efficiently.

The increased water quantities and resulting increased dry content are made possible by the structurally engineered felt with optimized absorptive capacity. The structure enables the felt to bridge the open spaces created by the grooving, reducing the risk of marking the paper. According to the company, SolarMax, the combination of suction roll cover and felt, offers maximum dewatering of the paper web and thus the highest possible dry content.

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