Metal sheet laminated with triple layered thermoplastic resin and a method for production thereof
US5585177A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 19, 1993 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Oct 19, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A triple layered thermoplastic resin laminated metal sheet for a can stock having excellent flavor retention of packed foods and drinks, excellent formability, excellent adhesion of the thus laminated resin layer to a metal sheet and excellent denting resistance, particularly excellent denting resistance at a low temperature, which comprises formation of a triple layered thermoplastic resin layer wherein a polycarbonate resin layer is sandwiched between polyester resin outer and inner layers on one or both sides of a metal sheet covered with a single layer of hydrated chromium oxide or a double layer consisting of an upper layer of hydrated chromium oxide and a lower layer of metallic chromium by using conventional film laminating, extrusion coating or the combination of these techniques.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.