Method and apparatus for production of foamed thermoplastic material
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United States of America Patent
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May 24, 1988
Grant Date -
N/A
app pub date -
Jul 23, 1986
filing date -
Jul 24, 1985
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method and apparatus for the production of a foamed thermoplastic material. A cavity transfer mixer is provided between a screw extruder which melts, or fuses, the thermoplastic material, and a cooler. The cavity transfer mixer enables the formation of uniform and well mixed admixtures of a foaming agent and a thermoplastic material and, optionally, other desired additives.
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