| 摘要 |
<p>A method of manufacturing heat recoverable tubing by (a) extruding pellets of a heat shrinkable, heat sealable plastic into a sheet; (b) cross-linking the sheet with electron beam or alternative form of radiation; (c) orienting the irradiated sheet by stretching the sheet widthwise; and (d) forming the oriented sheet into a tube about a longitudinal axis. The tube is longitudinally seamed, and is formed as either a continuous tube or a discreet length of tube. The surface of the sheet which becomes the inner surface of the tube when the tube is formed, can be coated before the tube is formed. Tubes of any diameter may be formed by the method of the invention.</p> |
