Dimensional stability in LDPE foams

Document Type

Conference Proceeding

Publication Date

12-1-2005

Abstract

Unbalance between the effusion rate of the blowing agent and the infusion rate of air in post-extrusion LDPE foam sheets causes dimensional instability of the sheets. A one-dimensional diffusion model coupled with a constitutive Voigt equation was proposed to study the time-dependent dimension in LDPE foams. The features of shrinkage-restoration or swell-relaxation were captured by varying the permeability ratio of gases. Comparisons with experimental results were made to retrieve the parameters used in the model. These parameters are related to the physical properties of the materials used and are expected to correlate to the structures of the foams such as the global porosity and cell size distribution.

Identifier

33645007742 (Scopus)

Publication Title

Annual Technical Conference ANTEC Conference Proceedings

First Page

69

Last Page

74

Volume

10

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