Large Friction Coefficient and High Abrasion Resistance Achieved with Original Blending Technology

OA equipment must process a wide range of paper types, such as coated paper and foreign-made paper. The paper feed and transport roller must be made of rubber that retains a high friction coefficient even after transporting many different types of paper. By maximizing original design know-how, Yamauchi developed a rubber material that offers high resistance to wear even when used for a long period of time, retains a high friction coefficient even when paper dust adheres, and significantly reduces paper contamination. Yamauchi offers highly reliable and durable paper feed and transport rollers.

What Makes Our Paper Feed Rollers Special?

Years of development from the basic elements to the finishing touches have resulted in high-performance paper feed rollers that combine a unique blend of rubbers and tribology theory to create a radical surface shape. These rollers show minimal decrease in friction coefficient and maintain a high level of performance even in low-temperature-low-humidity environments, and even after feeding different types of paper, including coated papers and those that produce a lot of paper dust. The two-layer roller (sponge and solid) offers a high friction coefficient, despite its low level of hardness. Our paper feed rollers have also solved the noise issues that previously plagued users, leading Yamauchi rollers to be chosen by more copier manufacturers. Moreover, our EPDM high-performance paper feed rollers are becoming a global standard for the copier industry, with a strong uptick in use by overseas manufacturers.

High Friction Coefficient and Superb Resistance to Abrasion Achieved with Original Design Know-How

We use EPDM with hardness ranging from 20 to 45 (A) as the material for paper feed rollers. Created with a formulation technology developed based on our extensive experience, these materials offer both high friction coefficient retaining characteristic and superb abrasion resistance. We also mass-produce belt-shaped samples, in addition to ordinary rolls. We can also use a polyurethane material for applications requiring higher abrasion resistance, such as high-speed machines. Yamauchi offers a wide range of materials to meet customer needs.

Two-layer Rollers Eliminate Annoying Issues

Our 2-layer paper feed rollers use materials of different hardness: sponge on first layer and solid on the second. Our production techniques and processes ensure these tricky-to-manufacture rollers can be mass-produced to a high degree of dimensional accuracy while eliminating the noise issues that customers have long struggled with.

Unique Surface Geometry Inspired by Tribology Theory

A major problem with new types of paper, especially those with a high paper dust content, is that paper dust builds up on the roller surface and reduces the frictional force. We studied this issue extensively based on test data accumulated through joint research with external institutions, and this led us to the idea of “refreshing,” in which paper dust falls into grooves and the roller surface is shaved to “refresh” the surface. The result is a more durable roller with a high friction coefficient. This unique surface geometry has been patented and is already highly popular with copier manufacturers.

Finding the Ideal Roller Surface Geometry for Your Needs

We have a long track record with an extensive range of paper feed roller surface geometries, including knurled and T shapes, and those shown here. With our formidable R&D capabilities, we can find the precise solution to meet the full range of your needs.

What Makes Our Transport Rollers Special?

A Wide Selection of Materials to Provide Rollers that Meet Specific Product Requirements

For transport rollers (registration rollers and paper output rollers), we offer materials with hardness ranging from 50 to 85 (A). Using materials such as EPDM, polyurethane, CR, SBR and silicon, we provide products that meet diverse needs. Our polyurethane rollers are highly evaluated because the roll diameter does not change easily due to toner absorption even when they are located close to the fuser rollers in high-speed, high-image-quality machines.