High barrier closure liner for carbonated beverage containers and the like
US6312776A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 18, 2000 |
| Grant date | Nov 6, 2001 |
| Priority date | — |
| Expiry date | Sep 18, 2020 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249999
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A multi-layer closure liner for carbonated beverage containers and the like, including a gas barrier layer, a first tie layer on an upper surface of the gas barrier layer, a second tie layer on a lower surface of the gas barrier layer, a first polyolefinic resin layer on the upper surface of the first tie layer, and a second polyolefinic layer on the lower surface of the second tie layer. In the preferred embodiment, the gas barrier layer is ethylene vinyl alcohol copolymer (EVOH), the first and second tie layers are functionalized polyolefin and the first and second polyolefinic resin layers are ethylene vinyl acetate (EVA). The layers defining the closure liner are preferably simultaneously formed using a co-extrusion process to prevent the gas barrier layer from being exposed to moisture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.