Materials
Generally all Boettcher compounds are available for application in digital printing. Specially developed compounds for the use in digital printing are for example:
- Polyurethanes (defined electrically conductive or for heavy duty applications)
- EPDM (non blooming, electrically conductive)
- ECO (defined electrically conductive)
- NBR (electrically conductive)
- Polyimide (high temperature resistant and/or defined electrically conductive)
- Hardness range: 10 ShoreA up to 90 ShoreD
- Specific resistance: 103-1015 Ωcm; 106 - 1010 Ωcm defined specific resistivity
All given data are typical values and depend on roller type.
Production process
- mould casting
- rotational casting
- spray coating
- dip coating
- precision grinding
- surface fine-polishing
Geometry
- Processing up to about 2 m in diameter and up to about 8 m in length
- Grinding tolerances: runout, cylindricity, diameter: 0,03 mm
- Surface: Rz < 1 µm, compressible layer structure