Two-layer closure, particularly for closing plastic containers
US4398644A · kind A · utility
7Cited by
1References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 7, 1981 |
| Grant date | Aug 16, 1983 |
| Priority date | — |
| Expiry date | Oct 7, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31692
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The invention relates to a two-layer composite material comprising a metal foil and an adhesive layer. The adhesive layer is formed of a mixture of two compounds A and B, compound A being a copolymer of an aliphatic monoolefin and a monoethylenically unsaturated carboxylic acid which has good adhesion for the metal foil and the container, and compound B being a compound adapted to reduce the adhesion of compound A for the metal foil and/or the container. Said composite material is intended in particular for the fabrication of caps serving as closures for containers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.