| 摘要 |
A process for severing a tube sheet made from a polymeric material to expose bores of hollow fibers having the ends thereof embedded in the tube sheet, with the tube sheet having a cylindrical configuration and a stress raiser extending around the periphery thereof, wherein a ring having a lower coefficient of expansion than the material of the tube sheet is positioned to encircle the tube sheet at a location adjacent to the stress raiser. The tube sheet is then heated to expand it to the point where stress causes the tube sheet to fracture off that portion of the tube sheet encircled by the ring from the remainder of the tube sheet to expose bores of the fibers.
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