| 摘要 |
<p>A tubular article comprising a multi-wall extruded tube, one embodiment of which is a dual-wall extruded tube including an elastomeric outer wall having a first color and an elastomeric inner wall having a second color. The dual-wall tube may be formed by co-extrusion to provide a bond between the two walls. Visible indicia may be formed in the tubular article by removal of selected portions of the elastomeric outer wall using laser ablation to reveal the second color of the elastomeric inner wall. The first color differs from the second color to provide high contrast of the indicia from the first color of the elastomeric outer wall. A tubular article according to the present invention is expandable for placement on a core member in an expanded condition wherein the bond between the elastomeric outer wall and the elastomeric inner wall remains substantially unchanged.</p> |
