Low melt flow index resins for injections-stretch-blow-moulding
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United States of America Patent
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Nov 25, 2014
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app pub date -
Jun 20, 2007
filing date -
Jun 21, 2006
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Abstract
The present invention discloses a method for preparing vials, preferably medical vials by two-stage injection-stretch-blow-molding with a random copolymer of propylene having a melt index MI2 of from 1 to 3 dg/min and an ethylene content of from 2 to 3.5 wt % based on the weight of the resin, and wherein the preform injection temperature is of at least 280° C.
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