Blow-molded container with in-mold label and method for manufacturing blow-molded container with in-mold label

A method for manufacturing a blow-molded container with an in-mold label including

• a container body having a body portion that forms a square shape in which planar portions and corner surfaces are alternately and continuously provided around a container axis, in a cross-sectional view orthogonal to the container axis;
• and
• in-mold labels, adhering on outer peripheral surfaces of adhesion portions in the body portion, the adhesion portions being positioned at the corner surfaces and the planar portions which are positioned continuously to the corner surfaces in the container axis, the method comprising:
• a setting process of arranging a preliminary molded body and the in-mold labels within a cavity;
• and
• a blow-molding process of blow-molding the preliminary molded body to form the container body and adhering the in-mold labels on the outer peripheral surfaces of the adhesion portions,
• wherein, among front and back surfaces of the in-mold labels, multiple recesses are formed over the entire back surfaces of the in-mold labels which are adhered to the outer peripheral surfaces of the adhesion portions,
• wherein E×t3 satisfies 0.20 or less, wherein the tensile elasticity of the in-mold labels is E (MPa) and the thickness of the in-mold labels is t (mm), and
• wherein R×θ2 is 45000 or more, where the radius of curvature of the corner surfaces is R (mm) and an angle formed between the planar portions is θ (°) in a cross-sectional view of the adhesion portions.