Dependence of Polymer Orientation and Film Properties on the Blown Film Fabrication Process - A New Method for Calculating Post-Die..., 2000 Polymers, Laminations & Coatings Conference Proceedings

D. T. Gillespie, D. S. Hoffpauir, J. J. Longlet, P. Shannon, D. Stern, K. Taylor, W. W. Yau--History has shown that tubular film properties can greatly vary with fabrication conditions. In order to understand how to optimize resin performance under varying conditions it is necessary to understand the crystallization process in film. It will be shown that fabrication variables such as blow-up ratio, gauge, frost-line height and output rate markedly influence polymer orientation and the resultant properties in tubular blown film. In explaining how these processing factors influence final film properties, we find great utility in considering a reduced parameter that quantifies the time that the polymer resides in the melt after it exits the die. This paper will demonstrate a new method for calculating the post-die time in the melt (Qtime) and will show how it can be correlated to polymer orientation and final properties of HDPE films.

Author: Longlet, J.J., Gillespie, D.T., Hoffpauir, D.S.
Dependence of Polymer Orientation and Film Properties on the
Dependence of Polymer Orientation and Film Properties on the Blown Film Fabrication Process - A New Method for Calculating Post-Die..., 2000 Polymers, Laminations & Coatings Conference Proceedings
35.00

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