Process for producing injection stretch blow molded polyolefin containers
AssigneeBasell Poliolefine Italia S.r.l.
InventorsMike Rogers, Anja Gottschalk
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Abstract
Injection stretch blow molding process for preparing polyolefin containers, comprising the following steps: 1) preparing a preform by injection molding a polyolefin composition comprising a polymer (A) selected from ethylene polymers, propylene polymers and mixtures thereof, and a heat absorber (B); 2) supplying heat to reheat the preform prepared in step 1) and stretch blow molding said preform; wherein the heat absorber (B) is selected from phosphates, condensed phosphates, phosphites, and mixed hydroxide/phosphate oxanion compounds of Copper (Cu), Calcium (Ca), Tin (Sn) and/or Iron (Fe).
Claims10
An injection stretch blow molding process for preparing polyethylene containers comprising:
- 1) preparing a preform by injection molding a polyethylene composition comprising (A) ethylene polymers and a heat absorber (B) comprising 250-1000 ppm Cu2(OH)PO4;
- 2) heating the preform of step 1) to a temperature of 120-135° C. on the inner and outer surfaces of the preform;
- and
- 3) stretch blow molding the preform of step 2.
Dependencies are inferred from the claim text.