Extrusion apparatus having a driven feed segment
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United States of America Patent
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Apr 7, 2009
Grant Date -
Apr 12, 2007
app pub date -
Oct 11, 2005
filing date -
Oct 11, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
The invention is an extrusion apparatus having a driven feed segment that is rotatably driven about central mandrel or within a housing member. Rotation of the driven feed segment subjects one or more streams of resin introduced onto a surface thereof to transverse shear during radial flow. One of more driven feed segments can be assembled with other components of conventional extrusion die assemblies. Extrusion die assemblies can include one or more driven feed segments rotated in the same or opposite direction of each other. The number of streams of resin and rotational speed of the driven feed segment can be controlled to produce microlayered film having in excess of 4000 layers.
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