KB ROLLER TECH KOPIERWALZEN GMBH

Requirements for products working in a high temperature fusing environment include continuously increasing requests for longer part life, higher print speed, and better print resolution involving ongoing material and process innovations. Our goal is to find the best combination of the following properties: Thermal resistance Thermal conductivity Abrasion resistance Anti-adhesive surfaces Elastomer hardness Substitution of Metal Substrates by Polyimide Belts Fusing by heat and pressure in digital printers has previously been realized with anti-adhesive coatings on aluminum or steel cores. These metal substrates have been increasingly replaced by seamless thin walled polyimide belts due to energy-saving environmental regulations and the growing requirement for “instant on” printing devices. Image Fusing Products Fuser rollers with soft and thin coatings more Fuser rollers for professional digital printing more Pressure rollers with solid silicone/PFA sleeves more Pressure rolle

The requirements: highly precise tolerances without surface grinding extremely thin silicone coating layers (in picture: 0.6 mm) high silicone thermal conductivity (in picture: > 0.8 W/mK) anti-adhesive, thin top coatings (in picture: 30µm PFA)

The latest generation of color laser printers have four toning stations (CMYK). Paper passes all four stations in one cycle which enables higher print speeds. This design requires precise positioning of the belt with respect to the paper during the toning cycle. This need defines the properties of a seamless belt for a perfect printout: Perfect, defect-free surface Tight tolerances of diameter, length, width and surface roughness Precisely defined electrical conductivity over the entire belt surface KB RollerTech`s capabilities: Diameters: up to 1,000 mm Width: up to 600 mm Thickness: 50 - 100 µm (±10%) Electrical properties: 1E5 - 1E16 Ohm cm Roughness: < 1,0 Ra Primary and Transfer Charge Rollers Charge rollers are critical for long lasting, high quality printouts in laser printers and copiers. KB Roller Tech’s special compounds enable charge rollers to maintain continuously stable electrical properties. Primary charge rollers are mostly soft coated rollers with sensitive surf

The requirements: long life (e.g. > 1 Mio A4) extremely thin elastomer coatings (e.g. < 1 mm) processing of high duty elastomers (e.g. fluoro-elastomers) high abrasion resistance non-stick top coatings (e.g. Teflon®)