Low hardness ionic conductive material Developing Rollers
By finishing the rubber surface roughness to be smaller than that of the toner particles, we provide a developing roller that supports an even higher image quality. Longer rollers are also available for wide-format (A0, A1 size, etc.) machines.

No toner sticking or filming. Optimized roller surface

In order to supply uniform toner to the photoconductor unit, the surface roughness of rubber and friction coefficient of the developing roller are very important. We have the technology to control and match these characteristics to various types of toner. We also offer low-hardness ionic conducting material developed through our unique formulation technology.
現像ローラ(印刷)

What Makes Our Developing Rollers Special?


Uses low strain materials born from Yamauchi’s unique blending technology

Yamauchi’s developing roller uses a newly developed low strain material that has evolved based on the ion conductive rubber compounding technology that has been proven in transfer rollers and other products. Despite being an ion conductive material, the dependence on environmental temperature and humidity is kept low, so that high image quality can be stably exhibited in any environment. As for the non-staining properties of the elements that come into contact with the developing roller, it is a feature that high-dimensional compatibility is achieved even with low-hardness materials.

Roller outer diameter runout and circumferential runout are minimized by our unique processing technology

Yamauchi’s developing roller adopts a method that further evolved our original processing technology, which has a proven track record with drive rollers. Despite being a low-hardness rubber material, it is possible to make the roller outer diameter runout and circumferential runout to an accuracy close to that of the drive roller. This can be maintained without any significant change even after various surface properties are given.

We propose surface properties corresponding to various use conditions and applications

We believe that it is possible to control the coefficient of friction and propose various coating materials to match the characteristics of various toners. Please contact us for detailed specifications.


Developing Rollers Lineup

Materials with Optimal Hardness, Resistance, etc., Meet Specific Product Requirements

Hardness and Resistance

*For certain roller shapes, we can respond to needs for characteristics outside the above ranges. Contact Yamauchi for details.