STRETCH BLOW MOLDED CONTAINER AND METHOD
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United States of America Patent
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Issued Date -
Mar 24, 2011
app pub date -
Sep 24, 2010
filing date -
Sep 24, 2009
priority date (Note) -
Abandoned
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Abstract
A method for making a container is disclosed. In an embodiment, the method includes providing a preform; applying heat or energy to at least a portion of the preform to bring the portion to an elevated temperature and so an inner surface of the preform is heated; and applying an air flow to the preform. In an embodiment an airflow of at least about 2,200 ft/min to maintain a temperature differential between the inner surface and the outside surface of the portion of the preform being heated to within about 20° F. The preform may subsequently be blow molded to form a container. In embodiments of the invention, polypropylene preforms may be used in connection with injection-stretch blow molding (ISBM) technologies for high-speed production of polypropylene containers.
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