| 摘要 |
PROBLEM TO BE SOLVED: To perform a stable sealing treatment between a film-form lid material and an opening flange portion when the sealing is performed by superposing the peripheral end portion of the film-form lid material on the opening flange portion of a cup-shaped container main body, and heat-welding them, and facilitate a drinking by making the shape of a portion with which mouth comes into contact, on the surface of the flange portion, a rounded corner (chamfered from) when a content is drunk by directly placing mouth on the flange portion on the cup-shaped container after the cup-shaped container is unsealed. SOLUTION: A lid material A for a cup-shaped container wherein an approx. flat lid material film 1 is easily peelably heat-weld-sealed to a ring-shaped flange portion 3 having a lower flat surface 3b with an easy peel-off layer 2 equipped with both of heat-bondability and easy peelability, which is provided on the rear surface of the lid material film 1, is used to seal the opening portion of the cup-shaped container main body B. |
