| 摘要 |
<p>The present invention addresses the problem of providing: a film roll core which offers excellent handleability since both end portions thereof have sufficient strength and can be held, and achieves reduced weight and cost, and in which even if condensation occurs on the inner peripheral surface thereof, the condensation does not easily flow to the outside; a film roll core wherein even when wear and the like occur, members other than a worn member can be reused; and a film roll core wherein slipping does not easily occur between a holding member and the film roll core, and a film can be stably wound. The present invention relates to: a film roll core provided with a cylindrical core tube, the core tube having, axially in the center thereof, a thin portion with an inner diameter larger than that of both end portions; a film roll core provided with a cylindrical core tube, the core tube having a cylindrical edge member detachably attached to each of both end portions; and a film roll core provided with a cylindrical core tube and having, at both ends thereof, an engagement portion for restricting relative rotation with respect to a holding member.</p> |
