Burgess, Ryan and Wayne
Hollow fiber fabric and process for producing the same
 A hollow fiber fabric comprising hollow fibers having a high hollowness ratio of at least 20% and composed of a polymer of a single composition, and the hollow fibers having slits as traces of a removed polymer and the slits being formed in the longitudinal direction of the fibers in such a state that the slits communicate to hollow portions. The fabric is produced by treating a fabric comprising hollow fibers having a high hollowness ratio of at least 20% and composed of a polymer of a single composition with a solvent or solution which dissolves the polymer, to partially dissolve the polymer at low orientation and/or deformation strain concentrated portions, to form slits as traces of a removed polymer in such a state that the slits communicate to hollow portions, along the longitudinal direction of the hollow fibers. 
Teijin Limited
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Shigenobu Hiroya Ichiro Tsuguo
Kobayashi Murase Okamoto Fujiwara