Polymer foam, thermoformed shapes thereof and methods of forming same
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United States of America Patent
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-
Jun 10, 1986
Issued Date -
N/A
app pub date -
Jun 18, 1984
filing date -
Dec 12, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A foam structure having a density of less than about 20 lbs/ft.sup.3. The method of forming the same comprising forming a homogeneous melt blend under pressure of a polymer member selected from the group consisting of polyetherimide resin particles, polycarbonate resin particles, a polymer blend of polyphenylene oxide and polystyrene in particle form imbibed with a blowing agent, followed by extrusion of the same into a lower pressure atmosphere. A composition comprising said particles imbibed with methylene chloride, chloroform, 1,1,2-trichloroethane or mixtures thereof. A method of thermoforming said foam in sheet form.
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Family
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Cited Art Landscape
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