Abstract
In copiers and printers that use electrophotography, the fusing process is one of the causes of paper curl. There are two mechanisms that generate curl during fusing : the first is the temperature difference between both sides of the paper, and the second is the bending of the paper in the nip region. In this article, we show the curl mechanism due to the temperature difference and the prediction methods for the two causes of curling. For predicting temperature difference curl, a moisture transportation analysis is proposed that calculates the distribution of moisture in the thickness direction. Next, the stress relaxation of the heated paper is measured experimentally, which uses the prediction of the curl caused by bending in the nip region. These two prediction methods are evaluated, and the calculated and experimental results are found to be in good agreement.
