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The hollow fiber membrane module has the following compare with the plate membrane:
- Without membrane base material, we can provide a small-sized compact module.
- Since the internal diameter side has no contact with the atmosphere, cleanness can be maintained.
- Easy to apply for the cross flow-typed module.
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Although the hollow fiber membrane module has many advantages, compared with the plate membrane, in order to seal fluid-tight the upstream side and downstream side of hollow fiber membrane module, you need completely seal the clearance between pieces of hollow fiber membrane at the tying ends of hollow fiber membrane.
Conventionally, such two liquid hardening-typed adhesive agents as urethane resin and epoxy resin have been used as sealing compound. However, these two liquid hardening-typed adhesive agents have the following disadvantages:
- The amount of eluate is large.
- The chemical resistance (against inorganic chemicals and organic solvents) is low.
- The strength of adhesive bonding is small.
Due to the above reasons, treatable fluids were restricted.
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Then, we, KITZ, have shed light on the replacement of the sealing member (potting agent), the largest disadvantage of hollow fiber membrane module, with thermoplastic resin which is in the same family as hollow fiber membrane. As a result, we have successfully adopt chemically stable olefin resin for all the fluid-contact surface materials .
That has dramatically increased the chemical resistance, decreased eluate, and improved the strength of adhesion. |
