Polyethylene terephthalate multi-layer preform used for plastic blow molding
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United States of America Patent
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Oct 8, 2002
Issued Date -
N/A
app pub date -
Aug 21, 1996
filing date -
Sep 10, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polyethylene terephthalate multi-layer preform (26) and a method for making the preform provides an inner layer (28) of virgin polyethylene terephthalate and an injection molded outer layer (30) of post consumer recycled polyethylene terephthalate which by weight is at least 75% of the total weight of the preform. The inner layer (28) of virgin polyethylene terephthalate is thermoformed prior to the injection molding of the outer layer (30) of post consumer recycled polyethylene terephthalate. A relatively large amount of the post consumer recycled polyethylene terephthalate can be utilized due to the thermoforming and injection molding as disclosed. More specifically, the post consumer recycled polyethylene terephthalate preferably by weight is 85%, most preferably in the range of 88 to 92% and optimally about 90% of the total weight of the preform.
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