Retort-sterilizable laminated structure and process for preparation thereof
US4310578A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 5, 1979 |
| Grant date | Jan 12, 1982 |
| Priority date | — |
| Expiry date | Jul 5, 1999 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Disclosed is a retort-sterilizable laminated structure comprising an aluminum foil or sheet, a heat-sealable crystalline propylene type resin layer formed on one surface of the aluminum foil or sheet and a heat-resistant resin layer formed on the other surface of the aluminum foil or sheet, wherein the aluminum foil or sheet is heat-fusion-bonded to said crystalline propylene type resin layer through a layer of a modified olefin resin having a degree of crystallization of 15 to 95% and a carbonyl group concentration of 1 to 600 meq/100 g of the polymer, in which the majority of the structural olefin units are propylene units and the minority of the structural olefin units are ethylene units. As the modified olefin polymer, a modified ethylene-propylene copolymer or a blend of a modified propylene type polymer with an ethylene type polymer is preferably employed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.