Can body, product can, and method for manufacturing can body

A method for manufacturing a can body having a bottomed cylindrical shape including a can bottom and a cylindrical can barrel extending from an outer periphery of the can bottom along a can axis and centered on the can axis, the method comprising:

• a step of forming a dome portion provided at a central portion of the can bottom and forming, as an annular protruding portion continuously extending from an outer peripheral edge portion of the dome portion and annularly protruding outward from the can body substantially along a direction of the can axis, the annular protruding portion including a recessed portion provided continuously with the dome portion and having a curved surface convex outward in a radial direction of the can body, a ground contact portion configured to support the can body, and an inner peripheral wall portion extending from the ground contact portion to the recessed portion;
• and
• a step of performing, after the step of forming the dome portion and the annular protruding portion, bottom reforming of pressing, along a direction of the can axis, a forming tool having a forming surface along a curved surface of the dome portion against the dome portion from an inside of the can body so that in a longitudinal sectional view including the can axis, an angle θ between a tangent line M on an outer surface of the dome portion and a plane orthogonal to the can axis at a position where a virtual line L1 parallel to the can axis and in contact with an innermost portion of the inner peripheral wall portion intersects the outer surface of the dome portion is 45° or more and 65° or less.