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Optimizing blown film polyethylene using a merit function

✍ Scribed by Kirk M. Cantor; Ian R. Harrison

Book ID
104522781
Publisher
Society for Plastic Engineers
Year
1990
Tongue
English
Weight
365 KB
Volume
30
Category
Article
ISSN
0032-3888

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✦ Synopsis

Abstract

The extrusion of blown film polyethylene is a complex process characterized by a large number of interdependent process variables. In order to derive the set of process conditions necessary for a desired film solid state property, the processor normally utilizes a laborious trial‐and‐error method. In this work, a technique is described to establish more directly the set of extruder settings for producing film with an optimum value of a given property. Biaxial toughness was optimized in the present work, but the technique is applicable to any quantifiable film property.

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## Abstract Real‐time polarized Raman spectroscopy was used in this study to measure the molecular orientation evolution during blown film extrusion of low‐density polyethylene (LDPE). Spectra were obtained at different locations along the blown film line, starting from the molten state near the di