Method for Producing Containers Comprising a Narrow Opening and a Long Body by Means of Below Molding or Stretch Below Molding Polypropylene Preforms
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United States of America Patent
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Issued Date -
Sep 27, 2007
app pub date -
Apr 26, 2005
filing date -
Apr 30, 2004
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The invention relates to the production of containers (2) comprising a narrow opening and a long body, such as bottles or similar, from polypropylene by means of blow moulding or stretch blow moulding. According to the invention, during the blow moulding or stretch blow moulding step, the polypropylene preform (1) undergoes longitudinal stretching at a ratio (L/1) of between approximately 2 and 3.5 and radial stretching (D/d) at a ratio of between approximately 2 and 3.
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