US 2017/0282126 A1Published application

Hollow fiber membrane module and method for producing the same

AssigneeAsahi Kasei Kabushiki Kaisha

InventorsKohei NAKAMOTO, Naoyuki SHINOHARA

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Abstract

A module includes a bonded portion in which the hollow-fiber-membranes are bonded and fixed together by potting material at least in an end portion of each of the hollow-fiber-membranes. Each of the hollow-fiber-membranes has a resin impregnation portion in which resin is impregnated into an outer surface side of each of the hollow-fiber-membranes at least in the end portion where each of the hollow-fiber-membranes is bonded and fixed together. In the end portion of the hollow-fiber-membranes, a leading edge of the resin impregnation portion toward the other end of each of the hollow-fiber-membranes is located closer to the other end than a leading edge of the bonded portion toward the other end. The thickness of the resin impregnation portion in the direction of the wall thickness of the hollow-fiber-membranes is 10 to 70% with respect to the thickness of the hollow-fiber-membranes.

Claims18

Dependent claims

A hollow fiber membrane module comprising:

a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes bundled together,
wherein the module includes a bonded portion in which the plurality of hollow fiber membranes are bonded and fixed together by potting material at least in an end portion of each of the plurality of hollow fiber membranes, and
wherein each of the plurality of hollow fiber membranes has a resin impregnation portion in which resin is impregnated into an outer surface side of each of the plurality of hollow fiber membranes at least in the end portion where each of the plurality of hollow fiber membranes is bonded and fixed together, and
wherein a leading edge of the resin impregnation portion toward the other end of each of the plurality of hollow fiber membranes is located closer to the other end than a leading edge of the bonded portion toward the other end in the end portion of each of the plurality of hollow fiber membranes, and
wherein the thickness of the resin impregnation portion in the direction of the wall thickness of the hollow fiber membrane is 10 to 70% with respect to the thickness of the hollow fiber membrane.

2 more elements

A method for producing a hollow fiber membrane module including a hollow fiber membrane bundle composed of a plurality of hollow fiber membranes bundled together,

the method comprising:
a preliminary step before bonding, in which a resin impregnation portion is formed in an outer surface side of each of the hollow fiber membranes by dipping at least an end portion of each of the hollow fiber membranes in resin solution obtained by diluting resin with organic solvent, and after then by drying the dipped portion;
and
a bonding step, in which a bonded portion is formed, after the preliminary step before bonding, by bonding and fixing the end portion including the resin impregnation portion of each of the plurality of hollow fiber membranes together by potting material,
wherein the concentration of resin in the resin solution used in the preliminary step before bonding is 10 to 70 mass %, and
wherein in the bonding step, the bonded portion is formed in such a manner that a leading edge of the resin impregnation portion toward the other end of each of the plurality of hollow fiber membranes is located closer to the other end than a leading edge of the bonded portion toward the other end in the end portion of each of all the plurality of hollow fiber membranes.

3 more elements

Dependencies are inferred from the claim text.