Process for crystallization polyester granules
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United States of America Patent
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Feb 5, 2002
Issued Date -
N/A
app pub date -
Mar 28, 2000
filing date -
Mar 28, 2000
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Expired
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Abstract
This invention discloses a process for crystallizing polyester granules having a bi-component structure consisting of a thin crystalline skin and an essentially amorphous interior. The crystalline skin prevents the granules from sticking together in hot post-crystallization processes such as solid state polymerization or melt extrusion. The amorphous interior of the polyester granules facilitates a melt extrusion process by allowing lower melt temperatures and extruded products of improved uniformity.
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