The purpose of this investigation was to analyze heat transfer characteristics of cavitated-core polymer films. The effects of thickness and composition on the insulative properties of thin polymer films were studied. Two experimental tests were developed to measure the heat transfer rate through a variety of thin films. One test apparatus was used to study convective and radiative effects while the second was used to study the conductive effects. A finite element model of a frozen food commodity wrapped in an insulative thin film was developed. Transient simulations were performed for the dynamic characterization of thermal wave propagation across the film layer. This model was then used to compare insulative properties associated with various packaging films . Experiments established that radiation effects are very significant in the freezer environment. Experiments also verified that cavitated-core films were more insulative than solid films. Modeling results illustrated that thickness and conductivity of a thin film only have insulative significance when exposed to a purely conductive environment.
Library of Congress Subject Headings
Plastic films--Thermal properties
Department, Program, or Center
Mechanical Engineering (KGCOE)
Swanson, Duane A., "Determination of the thermal properties of thin polymer films" (1991). Thesis. Rochester Institute of Technology. Accessed from
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