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SCO is an independent consulting office specializing in the areas of polymer processing and fiber formation by providing consulting services and software development.
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Chapter 16. Calendering |
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[Simulation Analysis for Polymer Processing by PC (9), Japan Plastics, Vol.50, No.7, P.86 (1999)]
Calendering is a process of producing sheets with uniform thickness, by passing soften or molten plastics material, through a nip clearance of two rotating rolls. McKelvey published the most fundamental theory [14], [15] which assumes the fluid is Newtonian, laminar, isothermal and incompressible. And also assumes the clearance between rolls is small compared with the radius of the roll, and therefore the gap between rolls gradually changes when approaching the nip point. This chapter describes the above-mentioned theory, and presents simulation program to analyze fluctuation of product thickness and its calculation example. [14] McKelvey, J. M., 'Polymer Processing', P.211, John Wiley & Sons ('62) [15] Tadmor, Z. & Gogos, C. G., 'Principles of Polymer Processing', P.363, John Wiley & Sons ('79) |