| 摘要 |
The present invention refers to a plastic material stripe suitable to manufacture rolled up tubes, provided with two complementary formed edges (1, 2), each one of which is provided with parallely developing buttresses (5, 6) and grooves (7, 8), and in which external groove width (7) is larger than interior buttress thickness (6). Closure formed by buttresses (5, 6) and grooves (7, 8) is preferably and completely inside stripe width. |
