Polyethylene for injection stretch blow molding applications
US9670342B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 12, 2014 |
| Grant date | Jun 6, 2017 |
| Priority date | — |
| Expiry date | Aug 12, 2034 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2314/02
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An injection stretch blow molded article may include a Ziegler-Natta catalyzed polyethylene resin having a multimodal molecular weight distribution and including at least two polyethylene fractions A and B. Fraction A may have a higher molecular weight and a lower density than fraction B. Each fraction may be prepared in different reactors of at least two reactors connected in series. Fraction A may have a melt index HL275 of at least 11 g/10 min and of at most 20 g/10 min, and a density of at least 941 kg/m3 and of at most 946 kg/m3. The polyethylene resin may have a melt index MI2 of at least 1.5 g/10 min and of at most 3.0 g/10 min, and a density of at least 950 kg/m3 and of at most 965 kg/m3.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.