Patent · US Expired

Large blow moldings made from polyethylene

US6913729B2 · kind B2 · utility

4Cited by

2References

3Claims

0Family size

Assignee

Elenac GmbH · DE

Inventors

Gunther Pfirrmann · Ludwigshafen, DE
Dieter Lilge · Schifferstadt, DE
Gunter Hatzmann · Leimen, DE
Dieter Boes · Wiesloch, DE

Key dates

Filing date	Jan 3, 2002
Grant date	Jul 5, 2005
Priority date	—
Expiry date	Jan 28, 2023

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY10T428/1352
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

Large blow moldings are made from polyethylene of density ρ≧0.94 g/cm3 and of melt flow rate MFR 190/21.6<50 g/10 min, and of notched tensile impact strength azK (−30° C.) not less than 300 kJ/m2 and bursting strength, determined by a drop height test at −18° C., of more than 3 m. Processes for producing large blow moldings of this type involve annealing large blow moldings after production. The moldings are used for storage and transport of hazardous materials.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.