Method of making a blow-moulded container from a thermoplastic polyester, in particular pet
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United States of America Patent
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Jun 12, 1990
Grant Date -
N/A
app pub date -
Nov 21, 1988
filing date -
Nov 27, 1987
priority date (Note) -
Expired
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Abstract
To improve the properties of biaxially orientated blow-moulded containers of PET the mouth region of the container serving for fitting a closure member is heat-set, i.e. crystallized at elevated temperature. The heat-setting is effected at the mouth end of a parison or preform and the previously heat-set mouth end is then reshaped to the finished mouth portion. This improves the dimensional stability of the mouth region.
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