Conductive Ceramic Coated Roller

  • Alumina used for the coating is very cut and abrasion resistant and is usually harder (Rc 55-60) than a steel knife blade. The inert ceramic surface will not erode due to direct exposure of the corona, although the sealer can be affected somewhat. Alumina is very thermally conductive and the allowable corona power level is typically twice that of organic coverings for the same roller dimensions. Cover thicknesses are typically from 100 to 200 microns.
  • PVN Live Shaft Rollers are mounted in external bearings allowing the shafts to rotate with the roll. Live shaft rollers are generally used in high temperature corona discharge applications to keep the bearings out of the harsh environment. Live shaft rollers are ideal for handling higher loads.
  • Sizes range from 75mm in diameter up to 500mm in diameter and up to 2500mm long
  • The Conductive Ceramic Roller Covering is ideal for corona treater designs that incorporate ceramic electrodes and a plain bare ground roller. PVN Ceramic coated rollers provides excellent resistance to ozone, which prevents the normal oxide build up that occurs with plain metal rollers. In addition, this conductive covering provides excellent resistance to cuts and wear, which reduces the likelihood of the roller surface causing any unwanted backside treat issues or marring of the substrate. This covering is recommended when substrates being treated are electrically conductive.

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Technical Data

  • Dielectric Constant: Conductive
  • Resistance to Ozone: Excellent
  • Dielectric Strength: Conductive
  • Cut/Wear Resistance: Excellent
  • Hardness: 55 RC (Rockwell C)
  • Max. Continuous Operating Temperature: 200° C
  • Short Term Max. Temperature: 240° C
  • Wall Thickness: 120 to 200 microns
  • Note: PVN also provides Ceramic Coated roller stripping & recoating services.


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