| 摘要 |
The method of annealing a tow of acrylonitrile-containing filaments, wherein the tow is advanced along a path through a housing under tension less than the shrinking tension of the tow, the path having at least two bends in opposite directions to each other, and passing steam along the walls of the housing to the inside corners of the bends, the steam having a sufficient velocity that it clings in layers to the walls of the housing to the inside corners thereof, the bends being sufficiently great that the steam will separate from the walls of the housing and pass through the tow at a tow-forwarding velocity at the inside corners.
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