| 摘要 |
A flexible strap (26, fig 5) for a security device includes a plurality of longitudinally extending multifilament cables 2 arranged in a substantially planar array and embedded in a thermoplastic elastomeric material 4. The cables have a coating of primer for creating a bond with the material. The method of making the strap includes drawing multifilament cables coated with primer through a die with a mass of heated thermoplastic material and cooling the material with the cables embedded therein. The elastomeric material may be polyurethane. Some of the surface of the cable filaments may be free of primer. Each cable may include multiple multifilament wires (8, fig 3), the wires being twisted around a core (10). The width to thickness ratio of the strap may be in the range 5:1 to 8:1. When the strap is used in a security device, the device may include locking units (28, fig 5) at either end. |
