CLOSING CAP FOR A CONTAINER AND ITS PRODUCTION METHOD

Described is a closing cap (1) for a container (2), which comprises a lateral wall (3) extending about an axis (Z) and a transversal wall (4) positioned at an end of the lateral wall (3), a separation line (5) being provided on the lateral wall (3) to form a retaining ring (301), which is configured to remain anchored to a neck (201) of the container (2) and extends up to a free edge (304), and a closing element (302) removably engageable with the neck (201), so as to open or close the container (2). The separation line (5) extends about the axis (Z) and is circumferentially interrupted to form in the lateral wall (3) a joining zone (305), which extends for a first angle (a), in which the retaining ring (301) and the closing element (302) are joined. The cap (1) comprises a tab (308), made in the joining zone (305), which extends circumferentially for a second angle (β) and is connected to the joining zone (305); the retaining ring (301) comprising a retaining portion (303) and a free portion (306), wherein the retaining portion (303) comprises an engaging element configured to engage internally with a locking ring (202) of the neck (201) during a passage from a closed condition to an open condition of the closing element (302), and wherein the free portion (306) comprises a movement element which extends circumferentially at least in the second angle (β) and is configured, during said passage, to allow a movement of the free portion (306) along an axis parallel to the axis (Z).