Resin-coated metal sheet for containers and method for manufacturing the same
US9993998B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 17, 2015 |
| Grant date | Jun 12, 2018 |
| Priority date | — |
| Expiry date | Feb 17, 2035 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2439/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Provided is a resin-coated metal sheet for containers having a resin layer (A) on a side of the metal sheet, the side being a side that will serve as a container inner surface when the metal sheet is formed into a container. The resin layer (A) has a polyester-based multilayer structure. The resin layer (A) contains 85 mol % or more of terephthalic acid. The resin layer (A) includes at least two layers, and an uppermost resin layer (a1), which is to be in contact with contends, contains 0.10 to 2.0 mass % of a wax compound with respect to the uppermost resin layer (a1). The maximum value of the Raman band intensity ratio (I1720/I1615) when measured for the cross section of the uppermost resin layer (a1) by using a laser polarization plane parallel to the surface of the resin layer (a1) is in the range of 0.45 or more and 0.80 or less. The uppermost resin layer (a1) has a thickness of 0.5 μm or more and 10 μm or less. The resin layer (A) excluding the uppermost resin layer (a1) has a thickness of 5 μm or more and 20 μm or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.