In a laser printer or copier, image is formed by the toner that adheres to the OPC(organic photoconductor) drum.
First, the OPC drum is charged, then a laser light is exposed on imaging area of the drum to discharge the surface potential. An image is formed on the OPC drum by toner adhering to the drum surface due to the difference in the electrical potential. OPC drum is thus a critical part of a laser printer or copier.
Each drum has three coating layers that serve different purposes and are all made from environmentally-friendly, biodegradable materials.
Aluminum Substrate is typically a diameter of 30mm, the case of the laser printer for personal or soho shall also uses 24mm diameter. Anodized surface and gives a reinforcement to the insulating ability of the blocking Layer.
Under coated layer
(UCL, leaving the charge blocking layer)
UCL layer helps allow the drum surface potential before exposure to the laser beam can be maintained at near -600v. Since CGL Coating When this high failure rate does not UCL the coating is required to maintain a stable quality.
charge generation layer
(CGL, the charge generating layer)
Is usually a blue color, it has a thickness of less than 1μm. CGL layer gives by exposure to the laser beam generates a positive charge offsetting the potential charged on the surface below the -100v. CGL active layer is the layer that most of OPC DRUM.
charge transport layer
(CTL, the charge transport layer)
CTL layer by passing the positive charge generated in the CGL to the surface DRUM made thickest among the coating layer of the OPC DRUM. Since the outer surface configuration is required with excellent permeability and excellent durability (my maternal sheets).