Polyolefin composition for injection stretch blow molding

Polyolefin composition for injection stretch blow molding

  • CN 101,490,160 A
  • Filed: 07/26/2007
  • Published: 07/22/2009
  • Est. Priority Date: 07/31/2006
  • Status: Active Application
First Claim
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1. make the injection-stretch blow molding shaping method of the shock-resistant container with favorable optical performance, this method comprises the steps:

  • (a) provide and comprise polypropylene and poly polyolefin compositions, described polypropylene be homopolymer or for propylene be selected from ethene and C 4

    C 10The random copolymers of the comonomer of alpha-olefin, and the manufacturing of described polyethylene use metallocene catalyst, (b) by described polyolefin compositions by at least 230 ℃

    , preferred at least 250 ℃

    , most preferably injection molding prepares preformed member under at least 270 ℃

    the injection temperature,(c) randomly described preformed member is cooled to room temperature,(d) temperature of the described preformed member to 90 of reheat ℃

    140 ℃

    randomly,(e) by the described preformed member of centibar axial tension and(f) with the gas under pressure described preformed member of blowing radially.

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