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
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.