1. Numerical analysis of polymer melt flow in the nipping region
- Author
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Takase, M., Katsumoto, R., Kegasawa, T., Kihara, S., and Funatsu, K.
- Subjects
Extrusion process -- Research ,Polymers -- Research ,Engineering and manufacturing industries ,Science and technology ,Research - Abstract
In the extrusion coating process, it has never been revealed how a polymer melt flows near the nipping region and how the cooling process occurs. We created a numerical simulation program for the polymer melt flow near the nipping region using the finite element method. Numerical results showed the effects of many individual factors (e.g. line speed, melt thickness, extrusion temperature, shear-thinning property, etc.) on the cooling process and polymer melt flow near the nipping region. It was found that a polymer melt buildup that can be observed between two calender rolls in the sheet forming process also formed in the extrusion coating process, and that the amount of polymer melt buildup (bank) depended upon the coating condition. It was found that not only line speed and melt thickness contribute to the extrusion coating process significantly, but also the rheological property has an effect on the process., INTRODUCTION The use of extrusion coated products in various commercial fields has rapidly increased during the past few decades; yet, in spite of this trend, few reports regarding the extrusion [...]
- Published
- 2002