Abstract: A film winding core (10) of the present invention includes a bearing portion (12), a plurality of blade portions 13, and a plurality of film supporting portions (14). The bearing portion (12) constitutes a tubular portion into which a shaft used to rotate the film winding core (10) is to be inserted. The plurality of blade portions (13) are provided respectively at a plurality of positions in a rotational direction of the bearing portion (12) and respectively extending outwardly from the bearing portion (12) so as to partition a space around the bearing portion (12) in the rotational direction. The plurality of film supporting portions (14) are respectively provided at positions outward from leading edges of the blade portions (13), and has an outwardly protruding shape so that a film (18) is supported away from the film winding core (10) between the film supporting portions (14) that are adjacent to each other in the rotational direction.

Abstract: A film winding core (10) of the present invention includes a bearing portion (12), a plurality of blade portions 13, and a plurality of film supporting portions (14). The bearing portion (12) constitutes a tubular portion into which a shaft used to rotate the film winding core (10) is to be inserted. The plurality of blade portions (13) are provided respectively at a plurality of positions in a rotational direction of the bearing portion (12) and respectively extending outwardly from the bearing portion (12) so as to partition a space around the bearing portion (12) in the rotational direction. The plurality of film supporting portions (14) are respectively provided at positions outward from leading edges of the blade portions (13), and has an outwardly protruding shape so that a film (18) is supported away from the film winding core (10) between the film supporting portions (14) that are adjacent to each other in the rotational direction.

Abstract: A film winding core (10) of the present invention includes a core body (12) and a plurality of film supporting portions (14). The core body (12) has a tubular shape. The plurality of film supporting portions (14) are provided around the core body (12). The film supporting portions (14) protrude from the outer peripheral surface (12p) of the core body (12) respectively at a plurality of positions in a rotational direction of the core body (12) so that a film (18) is supported away from the outer peripheral surface (12p) of the core body (12). Each of the film supporting portions (14) is made of a material that can be deformed when the film (18) is wound on the film winding core (10).