Abstract
The setting position of equivalent air layers inevitably caused by air existing in fusing region and having remarkable thermal resistance are studied for precise estimation of temperature field. Five layer setting models for numerical estimation are proposed and the estimated toner surface temperature is compared with the evaluations from the measured one at the nip outlet based on the similarity law of temperature field. It is clarified that the estimated temperature shows a good agreement with measured ones with the following models: 1) The air layer based on paper surface roughness is positioned between toner-roller interface and that based on the voids between toner particles is in the midst of toner layer. 2) The air layer based on paper surface roughness is the same position with model 1) and the toner is treated as a porous layer including air. The other calculation is applied to two kinds of paper with different surface roughness and also offers good estimation. The results confirm the usefulness of the models for numerical estimation.
