Basell Polyolefine Gmbh

Diana (nee Boos) Doetsch

Gerhardus Meier

Joachim Berthold

Albert Weber

The invention relates to a polyethylene molding composition having a multimodal molecular mass distribution and comprising a first ethylene homopolymer fraction (I), a second ethylene copolymer fraction (II) and a third ethylene copolymer fraction (III). The molding composition has a density at a temperature of 23&#xb0; C. in the range from 0.945 to 0.953 g/cm, an MFR (190&#xb0; C./5 kg) in the range from 2 to 7 g/10 min and a viscosity number VNof the total mix of ethylene homopolymer fraction (I), copolymer fraction (II) and ethylene copolymer fraction (III), measured in accordance with ISO/R 1191 in decalin at a temperature of 135&#xb0; C., in the range from 200 to 250 cm/g. The invention further relates to the use of such a molding composition for producing high-strength injection-molded screw cap closures for bottles comprising beverages, especially carbonated beverages.

PE moulding composition for producing injection-molded screw cap closures and high-strength screw cap closure for carbonated beverages produced therewith

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Mainz, Germany

Diana (nee Boos) Doetsch