Abstract: Tube sheets having a plurality of hollow fiber membranes suitable for fluid separations which are adapted to be provided in a fluid tight relationship within a permeator comprise a cured, solidified resinous composition of a liquid resinous composition comprising polyglycidyl resin-containing resin, curing agent and particulate filler. Methods are provided for making tube sheets.

Abstract: Processes are disclosed for sealing the ends of the bores of a plurality of hollow fiber membranes comprised of a thermoplastic material which membranes are arranged in the form of a bundle by subjecting the ends of the hollow fiber membranes to heat to effect the sealing. The heat also causes the ends of the hollow fiber membranes to adhere to one and another. An insert material is placed within the bundle of hollow fiber membranes at the zone which is subjected to the heat. This insert material provides a barrier to the adhering of the hollow fiber membranes and thus provides a fluid passageway at the sealed end of the bundle.