Laminated metal sheet for container
A laminated metal sheet 1 includes a film 3 including a laminated resin layer including at least two layers with polyester as a main component formed on one face or both faces of a metal sheet 2 . A polyester resin layer serving as a lower layer 3 a in contact with the metal sheet 2 of the laminated resin layer contains 90 mol % or more of terephthalic acid as a polycarboxylic acid component and contains a polyol component containing ethylene glycol and 1,4-butanediol, in which the polyol component contains 30 to 50 mol % of ethylene glycol, 50 to 70 mol % of 1,4-butanediol, and 10 mol % or less of other polyol components. A polyester resin layer serving as an upper layer 3 b of the laminated resin layer contains polyester containing terephthalic acid as a polycarboxylic acid component and 1,4-butanediol as a polyol component both of which are 90 mol % or more of the respective components, has a total thickness of 3 to 25 μm, and has a ratio (I011/I100) of peak intensity (I011) observed in the range of 2θ=15.5 degrees to 17.0 degrees to peak intensity (I100) observed in the range of 2θ=22.5 degrees to 24.0 degrees in X-ray diffraction in the range of 0.2 to 5.0.
1. A laminated metal sheet for a container, the laminated metal sheet comprising a laminated resin layer comprising at least two layers with polyester formed by polymerizing a polycarboxylic acid component and a polyol component as a main component on one face or both faces of a metal sheet,
wherein a polyester resin layer serving as a lower layer in contact with the metal sheet of the laminated resin layer contains 90 mol % or more of terephthalic acid in the polycarboxylic acid component and 30 to 50 mol % of ethylene glycol, 50 to 70 mol % of 1,4-butanediol, and 10 mol % or less of other polyol components in the polyol component, and
a polyester resin layer serving as a main layer and an upper layer of the laminated resin layer comprises polyester containing 90 mol % or more of terephthalic acid in the polycarboxylic acid component and 90 mol % or more of 1,4-butanediol in the polyol component,
the laminated resin layer has a total thickness of 3 to 25 μm, and has a ratio (I 011 /I 100 ) of peak intensity (I 011 ) observed in a range of 20=15.5 degrees to 17.0 degrees to peak intensity (I 100 ) observed in a range of 20=22.5 degrees to 24.0 degrees in X-ray diffraction in a range of 0.2 to 5.0,
a temperature of the metal sheet immediately before lamination is in the range of 160 to 240° C., and a time in which the laminated resin layer is in contact with the metal sheet during lamination is in a range of 1 to 35 ms.
2. The laminated metal sheet for a container according to claim 1 , wherein the lower layer in contact with the metal sheet in the laminated resin layer has a film thickness ratio of 10 to 30% relative to a total thickness of the laminated resin layer.
3. The laminated metal sheet for a container according to claim 1 , wherein the laminated resin layer contains a coloring pigment.
4. The laminated metal sheet for a container according to claim 1 , comprising a polyester resin of 1 μm or thicker laminated further above the laminated resin layer, wherein the entire resin layer has a total film thickness of 3 to 25 μm.
5. The laminated metal sheet for a container according to claim 2 , wherein the laminated resin layer contains a coloring pigment.
6. The laminated metal sheet for a container according to claim 2 , comprising a polyester resin of 1 μm or thicker laminated further above the laminated resin layer, wherein the entire resin layer has a total film thickness of 3 to 25 μm.
7. The laminated metal sheet for a container according to claim 3 , comprising a polyester resin of 1 μm or thicker laminated further above the laminated resin layer, wherein the entire resin layer has a total film thickness of 3 to 25 μm.
8. The laminated metal sheet for a container according to claim 5 , comprising a polyester resin of 1 μm or thicker laminated further above the laminated resin layer, wherein the entire resin layer has a total film thickness of 3 to 25 μm.