Stretch Film Using a Multi-Manifold Die
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United States of America Patent
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Issued Date -
Nov 6, 2014
app pub date -
May 1, 2014
filing date -
May 1, 2013
priority date (Note) -
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Abstract
A die for forming a stretch film includes at least: a primary passage for receiving a primary stream, the primary passage having a length extending from a die inlet opening to a die outlet opening; and a flow assembly for supplying a secondary stream to the primary passage at a secondary passage opening. A method for forming a stretch film includes: introducing a primary stream to a primary passage of a die at a die inlet opening, the primary passage having a length extending from the die inlet opening to a die outlet opening; supplying a secondary stream to the primary passage at a secondary passage opening; combining the primary stream and the secondary stream to create a combined stream; passing the combined stream through said die outlet opening; and passing the combined stream from the die outlet opening to a casting unit, thereby forming a film web.
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