High-density polyethylene for caps and closures

US9359493B2 · kind B2 · utility

Assignee

• TOTAL RESEARCH & TECHNOLOGY FELUY · BE

Inventors

• David Ribour · Mons, BE
• Alain Standaert · Brussels, BE
• Daniel Siraux · Naast, BE
• Ludovic Horion · La Louvière, BE
• Olivier Lhost · Havré, BE

Key dates

• Filing date: Sep 28, 2012
• Grant date: Jun 7, 2016
• Expiry date: Sep 28, 2032

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L2207/062
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A high-density polyethylene (HDPE) can be adapted for the manufacture of caps and closures. The caps and closures can be used as screw-on caps for carbonated or still drinks. The high-density polyethylene can have a density of at least 940 kg/m3 and of at most 970 kg/m3, and a high load melt index HLMI of at least 35 dg/min and of at most 180 dg/min. The high-density polyethylene can include a first polyethylene fraction and a second polyethylene fraction. The first polyethylene fraction can have a density of at least 920 kg/m3 and of at most 945 kg/m3, and a melt index HL275 of at least 3 dg/min and of at most 12 dg/min. The second polyethylene fraction can have a density of at least 960 kg/m3 and of at most 980 kg/m3.