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Method for Improving the Thermal Conductivity of Fuser Rolls

IP.com Disclosure Number: IPCOM000035176D
Original Publication Date: 1989-Jun-01
Included in the Prior Art Database: 2005-Jan-28
Document File: 1 page(s) / 13K

Publishing Venue

IBM

Related People

Burland, DM: AUTHOR [+3]

Abstract

A theoretical and experimental analysis of thermal conductivity of filled elastomers leads to concrete suggestions for the improvement of hot roll fusing elastomers, by incorporating nonspherical and, if possible, oriented filler particles into the polymer.

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Method for Improving the Thermal Conductivity of Fuser Rolls

A theoretical and experimental analysis of thermal conductivity of filled elastomers leads to concrete suggestions for the improvement of hot roll fusing elastomers, by incorporating nonspherical and, if possible, oriented filler particles into the polymer.

During the final step in the electrophotographic printing or copying process, the black toner particles are fused into the paper in most cases by squeezing the paper between a hot fuser roll and a cooler back-up roll. The fuser roll consists of an elastomer coating over a heated aluminum core. As a result of the fusing process, the fused image is permanently fixed to the paper.

The material requirements that a hot roll fuser elastomer must meet are formidable. It must be chemically stable at elevated temperatures (approximately 150oC) for thousands of hours, the heated toner and paper must not stick to the fuser roll and the roll must not degrade even after a very large number of stress cycles. Filled silicone rubber elastomers have been used with some success, as have filled fluoropolymers, such as VITON*. The polymer in both of these cases has a good high temperature stability and a relatively low surface energy that inhibits paper and toner sticking. The polymers are filled with particles, such as SiO2, Al2O3 and Fe2O3, to improve mechanical durability and thermal transport properties and to modify the chemical cross-linking network.

The thermal degradation of the elastomers can be drastically reduced if the operating temperature of the fuser roll is lowered. This can be accomplished by the addition of carefully chosen filler particles. Here we describe how to choose filler particles...