Abstract
Abstract It is proposed in this paper that non-symmetrical calendering can theoretically be analyzed easily by the broken section method. We assume that the flow is steady, isothermal and laminar and the polymeric materials behave as a power law fluid with flow index n. In the direction of calendering, polymeric materials between two rolls are broken into many sections, each of unit length. The materials in each section having different heights related to the clearance between two rolls behave under combined drag and pressure flow of power law fluids between parallel plates. The pressure distribution in the direction of calendering can be solved in four cases where the relationships between drag and pressure flows are varied, and, in addition, the position of maximum pressure can be determined. The theoretical results on the velocity profiles of polymeric materials in calendering can be obtained with better accuracy in the narrow nip region.
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