Multi-layer plastic preform for blow molding
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United States of America Patent
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Nov 20, 2001
Grant Date -
N/A
app pub date -
Feb 8, 2000
filing date -
Jul 30, 1997
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A multi-layer plastic preform 14 with an inner layer 28 that is extrusion blow molded from a resin having an intrinsic viscosity greater than 0.90, and an outer layer 44 that is injection molded around the inner layer from a resin having an intrinsic viscosity that is at least 0.10 less than the intrinsic viscosity of the inner layer. The inner layer 28 is no greater than 20% (preferably no greater than 15%) by weight of the total weight of the preform and the outer layer 44 is at least 80% (preferably at least 85%) by weight of the total weight of the preform.
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