Separation module and bundle unit of hollow thread-type porous membrane elements and methods of producing same

摘要

A separation module to be used for separation and filtration of micro-substances. The separation module comprises a bundled configuration of a plurality of hollow thread-type porous membrane elements made of high polymer material. The bundled configuration is sealingly disposed in a casing, in which the thread-type porous membrane elements are bound each other by means of molten thermoplastic resin. Such a separation module is produced by arranging the hollow thread-type porous membrane elements in a planar state; putting at least one of opposite end sections of the planar state porous membrane elements between first and second elongate thermoplastic resin films to form a sheet-like configuration; heating the sheet-like configuration to weld the films to each other and/or to the porous membrane elements; rolling up the welded sheet-like configuration in a longitudinal direction of the first and second thermoplastic films to form a rolled-up configuration in which two layers of the porous membrane elements are spirally wound, each layer being planar and including the parallelly arranged porous membrane elements; inserting the rolled-up configuration into the casing; and melting the first and second thermoplastic resin films to bind the end sections of the porous membrane elements to each other and to an inner wall of the casing.