Method for the Manufacture of Foams of Low Density
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United States of America Patent
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Issued Date -
Mar 26, 2015
app pub date -
Aug 29, 2014
filing date -
Sep 20, 2013
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method for manufacturing low density foams comprises the following steps. A polymeric material is melted in a first extruder (201) to a polymer melt, a blowing agent is added to the polymer melt, and a melt containing the blowing agent is obtained which is directed to a second extruder (211). Thereafter the melt containing the blowing agent is cooled in the second extruder (211), thereafter the melt is directed through a static mixer after leaving the second extruder (211), whereby the static mixer is disposed with a mixer insert (3), by which the temperature of the melt is homogenized over the entire cross-section, whereby the static mixer can be cooled and/or heated to obtain a temperature stabilized cooled melt. Subsequently the temperature stabilized cooled melt is discharged through a die element (240, 250).
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