| 摘要 |
PCT No. PCT/FI88/00160 Sec. 371 Date Sep. 27, 1989 Sec. 102(e) Date Sep. 27, 1989 PCT Filed Oct. 5, 1988 PCT Pub. No. WO89/03294 PCT Pub. Date Apr. 20, 1989.The invention relates to a method for the production of a shrinkable product of a thermoplastic raw material by extrusion. The raw material (1) is extruded through a die (3) to form a pipe (18), whereafter the pipe is cut longitudinally in a cutter (7), spread out, and wound on to a reel (19, 17). The production rate is low and rapid cooling is carried out in a calibration gauge (4). When reheated, a bandlike product (9) thereby shrinks vigorously and is welded to the object in question. |
