| 摘要 |
Cable, wire, optical fibre and other elongated objects may be encased in a tube (1d) which has a longitudinal axis and is made from an elongated strip of oriented crystalline thermoplastic polymer film, wherein the strip is memory-set into a split tubular shape. The split (13) may be parallel to the longitudinal axis or follow a helical path along the tube. Preferably, the strip is memory-set so portions adjacent its longitudinal edges overlap or are adapted to be interlocked (21, 22). After forming into tubular form, the split tube may be splayed open and wound up on a roll for easy transportation; the memory-set tube will re-form when the strip is unwound from the roll. |
