| 摘要 |
PROBLEM TO BE SOLVED: To provide a synthetic resin hinge cap having a film-like hinge in which snap property, durability, and operability are excellent, and the transfer property are excellent in a step of fitting the cap to a container.SOLUTION: A hinge cap is integrally molded from a synthetic resin and includes a cap body 1, an overcap 2, and a hinge mechanism 3. In the hinge mechanism of the film-like hinge, both ends thereof are connected to each other along an outer circumferential surface of the corresponding cap body and an outer circumferential surface of the overcap. In the film-like hinge, the thickness at its end is larger than the thickness at a center part, and the position at which the thickness of the film-like hinge is minimum is present between the center part and the end. The hinge cap has the film-like hinge in which the hinge mechanism is made of a synthetic resin containing 100-4,500ppm fatty acid amide having cis-unsaturated carbon double bond. |
