Stewarts of America

Brush Rolls

"Superdense" brushes are unlike any regular brush you can envision - They are specially designed for perforating applications, with "superdense" bristle density.
Multi-wall bag and plastic web manufacturers are replacing urethane and felt roller with superdense brush rollers. Superdense brush innovation has improved the process of pin perforating, slit perforating and slitting plastic webs and board products dramatically. Two materials are typically used for perforating, Tampico fibers for hot perforating because of tampico's high temperature resistance, and Nylon for cold perforating, slitting or any other operation at room or low temperature. Positives of this technology is that the brushes extend pin life dramatically over a urethane, silicone or rubber covered roller, as the bristles deflect from the pin tips when penetrated. These bristles move together and provide a solid surface for the web. Another benefit is that it does not matter where the pins engage the brush roller. The brush can accept the pins or blades any location. This reduces setup time dramatically. It is important to note however, that the brush fibers can liberate from the roller, however, so it is important that the user has particle detection equipment downstream of the brush roller.
Superdense brushes offer:

• Superior slitting and perforation quality
• Kind to materials
• Bristles accept pins or blades without with little to no bristle damage
• Dramatically reduces setup and changeover times
• Adjusting the anvil roller to suit the perf roll or blade is completely eliminated, making misalignment impossible
• Excellent web support
• Economical
• Increases pin and blade life dramatically
• Brushes are recoverable