Processes for severing hollow fiber membranes

Details Processes for severing hollow fiber membranes Processes for severing hollow fiber membranes

B - Operations, Transporting

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F

164/1

B26F 3/00 (2006.01) B01D 53/22 (2006.01) B01D 63/02 (2006.01) B26D 3/12 (2006.01) B29C 65/02 (2006.01) B29C 65/74 (2006.01)

Patent

CA 1141286

07-52-0425A PROCESSES FOR SEVERING HOLLOW FIBER MEMBRANES ABSTRACT OF THE DISCLOSURE Processes are disclosed for severing a plurality of hollow fiber membranes comprised of thermoplastic material which membranes are arranged in the form of a bundle and also sealing the bores of the membranes in an essentially fluid-tight manner. The severing and sealing of essentially all of the hollow fiber membranes in the bundle can readily be accomplished without any significant decrease in membrane performance or strength. The severing and sealing of the hollow fiber membranes is accomplished by passing a heated member through the bundle in a path transverse to the orientation of the hollow fiber membranes wherein the temperature of the heated member is above the melt temperature of the hollow fiber membranes. Advantageously, the hollow fiber membranes which are severed in accordance with this invention can have a significant void volume and may be anisotropic with a thin, dense skin.

361065

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