Process for production of hollow-fiber membrane bundles
AssigneeAsahi Kasei Chemicals Corporation
InventorsYuzuru Ishibashi, Akihiro Watanabe
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Abstract
The present invention relates to a method of producing a hollow fiber membrane bundle having an end fixed with a casting material wherein the ends of hollow fiber membranes are fixed with the casting material in a condition that an insert is placed inside a hollow fiber membrane bundle at a position inner than a region where a fixing portion is formed, and then the insert is removed from the inside of the hollow fiber membrane bundle; and relates to a method of producing a hollow fiber membrane filter element through this method. The hollow fiber membrane bundle produced by the method of the present invention can be used in various types of filtration treatment such as external pressure filtration.
Claims9
A method of producing a hollow fiber membrane bundle having fixed ends, comprising placing an insert having an apparent density of 0.1 g/cm3 or less inside a hollow fiber membrane bundle at a position inner than a region to be fixed;
- fixing the ends of the hollow fiber membranes;
- and removing the insert from the inside of the hollow fiber membrane bundle, wherein the inset is a foam.
A method of producing a hollow fiber membrane bundle having fixed ends, comprising placing an insert having an apparent density of 0.1 g/cm3 or less inside a hollow fiber membrane bundle at a position inner than a region to be fixed;
- fixing the ends of the hollow fiber membranes;
- and removing the insert from the inside of the hollow fiber membrane bundle, wherein the insert is a balloon inflated with a gas and/or a liquid.
Dependencies are inferred from the claim text.