Shrink film
US7235607B2 · kind B2 · utility
11Cited by
31References
53Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 18, 2003 |
| Grant date | Jun 26, 2007 |
| Priority date | — |
| Expiry date | Aug 18, 2023 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31938
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
Heat-shrinkable monolayer and multilayer films are disclosed. The films are formed of a blend of a polyethylene copolymer having a CDBI of at least 70%, a melt index I2.16 of from 0.1 to 15 g/10 min., a density of from 0.910 to 0.940 g/cm3, a melt index ratio I21.6/I2.16 of from 30 to 80, and an Mw/Mn ratio of from 2.5 to 5.5, and a second polymer, such as a low density polyethylene (LDPE). The heat-shrinkable films have a combination of improved optical and mechanical properties.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.