Transforming Art into Science

Tangent slitters are better positioned to use overspeed, while wrap slitters may have problems with scuffing the material or altering the tension in the web. In most wrap systems the speed of the lower anvil ring will match that of the web. Typical overspeed guidelines are: +1 to +3 percent for foils, low elongation films, and delicate materials; +3 to +5 percent for general materials, papers, and boards; +5 to +10 percent for high elongation films, and loose fibered materials; and +10 to +100 percent for textiles, unbonded non-wovens, etc.