Multilayer film and container
US8784958B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 18, 2008 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Apr 16, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
In a multilayer film including a first layer (1), a second layer (2), a third layer (3), a fourth layer (4) and a fifth layer (5) stacked in this order, the first layer (1) is composed of a propylene-ethylene random copolymer and/or a polypropylene homopolymer, and the second layer (2) and the fourth layer (4) are each composed of a mixture of a propylene-ethylene random copolymer and an α-olefin elastomer. The third layer (3) is composed of a mixture of a polycycloolefin and polyethylene, and the fifth layer (5) is composed of a mixture containing a polypropylene homopolymer and a propylene-ethylene random copolymer in a weight ratio of 90:10 to 10:90. A container is formed of the multilayer film with an outer layer and an inner layer thereof being defined by the first layer (1) and the fifth layer (5), respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.