Resin-coated metal sheet for container, metallic container, and method of producing resin-coated metal sheet for container

A resin-coated metal sheet for a container, comprising a polyester resin coating layer on at least one surface of a metal sheet, 90 mol % or more of constituent units of the polyester resin coating layer being ethylene terephthalate units, wherein

• a full width at half maximum of a peak due to C═O stretching vibration in the vicinity of 1730 cm−1, as determined by laser Raman spectroscopy in which linearly polarized laser light is incident on a thickness direction cross-section of the polyester resin coating layer so that the polarization plane is perpendicular to the thickness direction of the polyester resin coating layer, is
• (I) 14.0 cm−1 or more and 18.5 cm−1 or less at a position of 1.0 μm thickness from an interface between the polyester resin coating layer and the metal sheet, and
• (II) 14.0 cm−1 or more and 18.0 cm−1 or less at a position of 1.0 μm thickness from the surface of the polyester resin coating layer,
• a value A/B obtained by dividing a full width at half maximum A at a position of 1.0 μm thickness from the interface between the polyester resin coating layer and the metal sheet by a full width at half maximum B at a position of ½ thickness of the polyester resin coating layer, of a peak due to C═O stretching vibration in the vicinity of 1730 cm−1, as determined by laser Raman spectroscopy in which linearly polarized laser light is incident on a thickness direction cross-section of the polyester resin coating layer so that the polarization plane is parallel to the thickness direction of the polyester resin coating layer, is 0.80 or more and 1.10 or less, and
• the polyester resin coating layer has a ratio I100/I110 of a diffraction peak intensity I100 of a (100) plane to a diffraction peak intensity I110 of a (110) plane, as determined by X-ray diffraction, of 2.00 or more and 6.00 or less.