JP2009195844A - Hollow fiber membrane module - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a flat hollow fiber membrane module suppressing exfoliation of fixing resin, without enhancing bending strength of a housing itself. <P>SOLUTION: The flat hollow fiber membrane module 1 includes: a bundle body 3 formed by bundling hollow fiber membranes 2 into a slender rectangular transection; the slender housing 4 with an end of the bundle inserted therein and fixing and holding it; a fixing resin part 7 for fixing ends of the respective hollow fiber membranes of the bundle inserted into an opening of the housing to each other and to an inner wall of the housing, with the open ends of the respective hollow membranes opened toward an inner space 5 for passing treating liquid in the housing, and sealing a space between the ends of the respective hollow fiber membranes and a space between the ends of the respective hollow fiber membranes and inner wall of the housing; and elastic bodies 9 extendedly disposed on an outer periphery of the fixing resin part along the longitudinal direction of the housing, the elastic bodies being bonded to the inner wall of the housing with bonding resin 8. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a hollow fiber membrane module, and in particular, to a flat hollow fiber membrane module used for filtration processes such as liquid separation, purification, and solid-liquid separation.

  The hollow fiber membrane module is sealed with resin between the hollow fiber membrane and the housing with the end of the converging body in which a number of hollow fiber membranes are bundled inserted into the housing and the end of the hollow fiber membrane is open. As a result, the converging body is supported and fixed in the housing.

  The hollow fiber membrane module having such a structure is used in the production of aseptic water, drinking water, highly pure water, and filtration treatment applications such as air purification. Furthermore, in recent years, hollow fiber membrane modules have been used for highly polluted water such as secondary treatment and tertiary treatment in sewage treatment plants, solid-liquid separation in septic tanks, and solid-liquid separation of SS (suspended material) in industrial wastewater. It is also used for filtration.

  In high-contamination water filtration, a high-pressure liquid is injected into the end opening of the hollow fiber membrane, a predetermined treated water is obtained by sucking a fluid from the end opening of the hollow fiber membrane, or the surface of the hollow fiber membrane. The operation of washing is repeated. For this reason, especially high pressure resistance is requested | required of the hollow fiber membrane module used for highly polluting water filtration.

  Examples of such hollow fiber membrane modules having high pressure resistance are disclosed in Patent Documents 1 and 2. In the hollow fiber membrane module of Patent Document 1, the Shore D hardness after 10 seconds in hardness measurement is 60 or more as a sealing resin for sealing between the hollow fiber membranes at at least one end of the convergent body of the hollow fiber membranes. Is used to improve the pressure resistance of the sealing resin.

  Further, Patent Document 2 discloses an adhesive for bonding within a range of 10 to 60 degrees in Shore A hardness after 10 seconds on the joint where the joint surface between the fixing resin portion and the inner wall of the housing is exposed in the inner space of the housing. Disclosed is a hollow fiber membrane module and a method for manufacturing the same, in which the resin is provided to suppress the occurrence of peeling between the fixing resin and the housing and to improve the pressure resistance.

JP 2003-103146 A JP 2006-61816 A

Here, the hollow fiber membrane module includes a cylindrical hollow fiber membrane module using a converging body in which a large number of hollow fiber membranes are bundled so as to have a circular cross section, and a large number of hollow fiber membranes each having a rectangular shape in cross section. And a flat hollow fiber membrane module using a converging body that is bundled so that
In the latter flat hollow fiber membrane module, the housing that holds the end of the converging body has an elongated shape that matches the cross-sectional shape of the converging body, and supports both ends in the longitudinal direction of the elongated housing. Thus, the entire hollow fiber membrane module is supported.

  The housing is usually made of an inexpensive general-purpose plastic material. For this reason, when the weight of the hollow fiber membrane module or an external force is applied to the housing supported at both ends in the longitudinal direction, the housing may be bent. Specifically, the vicinity of the center in the longitudinal direction of the elongated housing is deformed downward from both supported ends.

  As a result, even when the type and amount of the sealing resin is appropriately selected and the pressure resistance of the sealing resin itself is increased as in the hollow fiber membrane module of Patent Document 1, the convergence is increased when the deflection of the housing increases. There is a problem in that the sealing resin that holds and fixes the body to the housing may break, or peeling may occur between the sealing resin and the housing.

  Similarly, the fixing resin and the housing are bonded by adhering the fixing resin to the housing with an adhesive resin having a Shore A hardness of 10 to 60 degrees after 10 seconds as in the hollow fiber membrane module of Patent Document 2. Even when the peeling is suppressed, there is a problem that the adhesive resin may be torn or peeled off when the deflection of the housing increases.

  In order to prevent peeling of the fixing resin part, it is conceivable to use a fixing resin with a high hardness. However, if a fixing resin with a high hardness is used, the fixing resin part is easily broken and fixed. Since the stress acting on the bonding interface between the resin part for resin and the inner wall of the housing is increased, the fixing resin part is easily peeled off. For this reason, it is not preferable to use a fixing resin having a high hardness from the viewpoint of preventing peeling of the fixing resin portion.

  Therefore, the housing itself is made of a high-strength material such as metal, engineering plastic, or fiber reinforced plastic in order to prevent cracking or peeling of the sealing resin or adhesive resin by increasing the bending rigidity of the housing itself and suppressing the bending. It is possible to form with. However, since these materials are more expensive than general-purpose plastics, there is a problem that the cost of the hollow fiber membrane module increases when the housing is formed of these materials.

  Further, in order to increase the bending rigidity of the housing formed of a general-purpose plastic material, it is conceivable to increase the thickness of the housing itself or to provide a rib on the housing.

  However, when the thickness of the housing is increased, defects such as warpage and sink marks are likely to occur during molding. Furthermore, when a rib is provided on the housing, stress concentrates on the base of the rib, and cracks are likely to occur due to repeated load. Further, since the rib portion is thick, there is a problem that sink marks are likely to occur and the appearance of the housing may be deteriorated.

  The present invention has been made to solve the above-described problems, and provides a flat hollow fiber membrane module that can suppress fixing resin peeling and the like without increasing the bending rigidity of the housing itself. With the goal.

To achieve the above objectives,
A flat hollow fiber membrane module,
A converging body bundled with a plurality of hollow fiber membranes having an elongated rectangular cross section;
An elongated housing having an elongated opening into which the end of the converging body is inserted and fixed;
The ends of the hollow fiber membranes of the converging body inserted into the opening of the housing are mutually connected in a state where the open ends of the hollow fiber membranes open toward the internal space through which the processing liquid in the housing passes. A fixing resin portion for fixing to the inner wall of the housing and sealing the space between the end portions of each hollow fiber membrane and the space between the end portion of each hollow fiber membrane and the inner wall of the housing; ,
An elastic body arranged on the outer peripheral surface of the fixing resin portion so as to extend along the longitudinal direction of the housing,
The elastic body is bonded to the inner wall of the housing with an adhesive resin;
A hollow fiber membrane module is provided.

  According to the hollow fiber membrane module of the present invention configured as described above, since the elastic body is provided between the fixing resin portion and the housing, the elastic body is deformed when the housing is bent, and the housing A part of the bending is absorbed. Thereby, generation | occurrence | production of peeling etc. of the housing and the resin part for fixation by the bending of a housing is suppressed.

According to another preferred aspect of the present invention, the elastic body is made of a material that is softer than the material constituting the fixing resin portion and has a Shore A hardness of 10 to 80 degrees after 10 seconds. .
As described above, the use of the elastic body having a lower hardness than the fixing resin portion effectively suppresses the peeling of the fixing resin portion.

According to another preferred aspect of the present invention, the elastic body is disposed in a band shape along the inner wall between the converging body and the inner wall in the longitudinal direction of the housing.
In this way, the strip-shaped elastic body is arranged along the longitudinal direction of the housing, so that peeling of the fixing resin portion or the like is effectively suppressed.

  According to the present invention having such a configuration, there is provided a flat hollow fiber membrane module that can suppress the peeling of the fixing resin without increasing the bending rigidity of the housing itself.

  Hereinafter, a configuration of a flat hollow fiber membrane module 1 according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing a configuration of a flat hollow fiber membrane module 1 according to a preferred embodiment of the present invention. FIG. 2 is a partial cross-sectional view taken along line II-II in FIG. 3 is a partial sectional view taken along line III-III in FIG.

  As shown in FIG. 1, the hollow fiber membrane module 1 of this embodiment includes a converging body 3 in which a plurality of hollow fiber membranes 2 are bundled so as to have an elongated rectangular cross section, and an end of the converging body 3 is inserted. And a box-shaped housing 4 having a long and narrow opening.

As is apparent from FIGS. 2 and 3, a stepped portion 4 a whose size decreases stepwise is formed on the inner periphery of the housing 4. As shown in FIG. 3, the distal end portion of the converging body 3 is arranged so that the front end (open end) of each hollow fiber membrane 2 constituting the converging body 3 reaches the height position of the stepped portion 8 a. Is inserted into the housing 4 through the opening.
2 and 3 show the configuration in the vicinity of the lower housing 4 of the hollow fiber membrane module 1, but the upper housing 4 also has a similar structure except that the upper and lower sides are different.

  As long as the hollow fiber membrane 2 can be used as a filtration membrane, its pore diameter, porosity, film thickness, outer diameter, etc. are not particularly limited. Preferably, the hollow fiber membrane has an outer diameter of 20 to 3000 μm, a pore diameter of 0.001 to 5 μm, a porosity of 20 to 90%, and a film thickness of 5 to 300 μm.

  The material of the hollow fiber membrane 2 is not particularly limited. Preferred examples include polysulfone resins, polyacrylonitrile, cellulose derivatives, polyolefins such as polyethylene and polypropylene, fluorine resins such as polyvinylidene fluoride and polytetrafluoroethylene, polyamides, polyesters, polymethacrylates, and polyacrylates. In addition, copolymers of these resins or those having a substituent introduced into a part thereof may be used. Furthermore, what mixed 2 or more types of resin may be used.

  Since the hollow fiber membrane module of the present embodiment is a flat hollow fiber membrane module, the cross section of the converging body 3 has an elongated contour shape. Further, the arrangement direction of the hollow fiber membranes 2 in the converging body 3 is not particularly limited. Preferably, the hollow fiber membranes 2 are arranged substantially parallel to the flow direction of the liquid to be treated. If arranged in this way, the hollow fiber membrane 2 does not become an obstacle to the flow of the liquid to be treated. As a result, when a highly contaminated liquid containing contaminants is processed, accumulation and constriction of contaminants on the hollow fiber membrane 2 are reduced.

  Furthermore, the arrangement direction of the hollow fiber membranes 2 is preferably such that the length direction of the hollow fiber membranes 2 is the vertical direction, that is, the vertical direction. If arranged in this way, the upward flow direction of the liquid to be treated generated during air bubbling cleaning for cleaning impurities and the extending direction of the hollow fiber membrane 2 are substantially parallel. As a result, accumulation of impurities is prevented.

  In addition, the dimensions of each part of the housing 4 in this embodiment are as shown in FIG. 4, which is a cross-sectional view similar to FIG. 2, and the width A is 30 mm, the height B is 75 mm, and the upper part from the step 4a. The height C is 45 mm, the height D below the step portion 4a is 30 mm, and the width E of the step portion 4a is 3 mm. Further, as shown in FIG. 5, which is a cross-sectional view similar to FIG. 3, the longitudinal length F of the housing 4 is 1250 mm, the longitudinal length G of the opening is 1150 mm, and the step portion 4a The width H in the longitudinal direction is 3 mm.

  The material of the housing 4 is preferably a general-purpose inexpensive plastic from the viewpoint of reducing the manufacturing cost of the hollow fiber membrane module. Examples thereof include polycarbonate, polysulfone, polyolefin, PVC (polyvinyl chloride), acrylic resin, ABS resin, and modified PPE (polyphenylene ether). Further, when an incineration treatment is necessary after use, a hydrocarbon-based resin such as polyolefin that can be completely burned without emitting a toxic gas by combustion is preferable. Further, a material having mechanical strength and durability is more preferable.

  The front ends of the converging body 3 inserted into the housing 4 so that the front ends reach the stepped portion 4a are fixed to each other by the fixing resin portion 7 filled from the height position of the stepped portion 4a to the opening end of the housing 4. In addition, it is also fixed to the inner wall 4b of the housing 4. Since the fixing resin portion 7 is filled above the step portion 4 a in the housing 4, the lower portion from the step portion 4 a is surrounded by the fixing resin portion 7 and the inner wall of the housing 4 in the longitudinal direction of the housing 4. It is set as the internal space 5 extended along. The internal space 5 communicates with the outside through a through passage 6 formed at the longitudinal end of the housing 4.

  The open ends at the tips of the hollow fiber membranes 2 constituting the converging body 3 are arranged so as to open toward the internal space 5 and are fixed to each other by a fixing resin portion 7. With such a configuration, the treatment liquid passes from the outside to the inside of each hollow fiber membrane 2, is introduced into the internal space 5, and further flows out of the module through the through passage 6 and is filtered.

  Moreover, as resin which comprises the resin part 7 for fixation, an epoxy resin, unsaturated polyester resin, a polyurethane resin, a silicone type filler, various hot-melt resins, etc. can be used.

  In addition, the fixing resin portion 7 has a function of supporting the converging body 3 of the hollow fiber membrane 2 and ensuring the rigidity of the housing 4 in which the fixing resin is fitted and exhibiting pressure resistance during use. . For this reason, it is preferable that the fixing resin portion 7 has a hardness in a predetermined range. That is, when the hardness of the fixing resin portion 7 is less than 80 degrees in Shore A hardness after 10 seconds, a large amount of resin is required to maintain pressure resistance, and the cost of the hollow fiber membrane module 1 increases. It becomes a factor to make. Further, when the hardness of the fixing resin portion 7 exceeds 99 degrees in Shore A hardness after 10 seconds, the fixing resin portion 7 itself is easily cracked. Therefore, it is preferable that the hardness of the fixing resin portion 7 is 80 to 99 degrees in Shore A hardness after 10 seconds.

  In the present embodiment, a plate (band) -like elastic body 9 extending in the longitudinal direction of the housing 4 in contact with the inner wall of the housing above the stepped portion 4a on the left and right stepped portions 4a in the housing 4, respectively. Has been placed. As shown in FIG. 3, the elastic body 9 extends continuously over substantially the entire length in the longitudinal direction of the opening of the housing 4, and is bonded to the inner wall portion 4 b of the housing 4 with a fixing resin portion 7. It is bonded to the stepped portion 4 a of the housing 4 with an adhesive resin portion 8.

  In this embodiment, in this state, the fixing resin is filled in the space between the tip portions of the hollow fiber membrane 2 and the space between the converging body 3 and the inner wall of the housing 4 to seal these spaces. is doing.

  The material of the resin constituting the bonding resin portion 8 is not particularly limited, and for example, a known resin such as a urethane resin, a silicon resin, or an acrylic resin can be used. The material of the adhesive resin portion 8 is preferably selected according to the environment in which the hollow fiber membrane module is used and the type of liquid to be passed.

  The hardness of the material of the elastic body 9 is not particularly limited, but in order to give sufficient pressure resistance to the hollow fiber membrane module, the hardness of the elastic body 9 is in the range of 10 to 80 degrees in Shore A hardness after 10 seconds. Is preferred.

  The material of the elastic body 9 is not particularly limited, and the material of the elastic body 9 is selected according to the environment in which the hollow fiber membrane module is used and the type of liquid to be passed. For example, ethylene propylene rubber (EPDM), nitrile rubber (NBR), urethane rubber, silicon rubber, fluorine rubber, chloroprene rubber (CR), acrylic rubber, butyl rubber, and the like can be used. Thermoplastic elastomers such as styrene elastomers, olefin elastomers, vinyl chloride elastomers, urethane elastomers, ester elastomers, and amide elastomers can also be used.

  By providing the elastic body 9 in this way, the stress concentration on the bonding interface between the fixing resin portion 7 and the inner wall of the housing 4 is dispersed also in the elastic body 9. As a result, the maximum stress generated at the bonding interface is reduced, and the occurrence of peeling between the fixing resin portion 7 and the housing 4 is greatly reduced. As a result, the progress of peeling at the bonding interface between the fixing resin portion 7 and the housing 4, the partial destruction of the fixing resin portion 7, and the occurrence of leakage due to such destruction are suppressed.

  Thereby, even if the housing 4 is not thickened or provided with reinforcing ribs, the occurrence of peeling between the fixing resin portion 7 as the sealing resin and the housing 4 is suppressed, so that the hollow fiber membrane module Thus, the durability of the housing and the hollow fiber membrane module can be enhanced.

  When producing a hollow fiber membrane module having such a configuration, first, a number of aligned (for example, about 1500) hollow fiber membranes (outer diameter of 2800 μm) are bundled so as to have an elongated cross-sectional shape and converged. 3 is formed. Next, as shown in FIG. 6, both ends of the converging body 3 are inserted into a potting container 10 having an elongated rectangular opening and a sheet of the elastic body 9 disposed therein. Inject the fixing resin. After the resin was cured, the potting container 10 was removed, and the fixing resin portion 7 integrated with the sheet of the elastic body 9 was formed. Next, the fixing resin part housing 4 is attached to form a hollow fiber membrane module (FIG. 7).

  Next, the end surface of the fixing resin portion 7 integrated with the hollow fiber membrane 2 removed from the potting container 10 is cut to open the tip of the hollow fiber membrane. Next, the fixing resin portion 7 having the open end of the hollow fiber membrane 2 is bonded to the step portion 4a of the housing 4 with the adhesive resin 8 (FIG. 2).

Without being limited to the above-described embodiment of the present invention, various changes and modifications can be made within the scope of the technical idea described in the claims.
In the above embodiment, the fixing resin is injected into the container with the elastic body in the container used to form the fixing resin portion. The present invention is also applied to a hollow fiber membrane module in which a fixing resin and an elastic body are separately put into a housing without being bonded in advance, and then a sealing resin is poured into the housing to form a resin portion.

  Further, as shown in FIG. 8, the end surface of the fixing resin portion 7 integrated with the hollow fiber membrane 2 removed from the potting container is cut with a blade B to open the tip of the hollow fiber membrane, As described above, the fixing resin portion 7 is bonded to the step portion 4 a of the housing 4 with an adhesive resin.

  In the above-described embodiment, the example in which the housing is provided at both ends of the converging body of the hollow fiber membrane has been described. However, the embodiment is also applied to the hollow fiber membrane module in which the housing is provided only at one end of the converging body. .

  In the above-described embodiment, the two elastic bodies are arranged separately on both sides of the converging body. However, the elastic bodies provided on both sides of the converging body are connected to each other in the vicinity of the end of the housing. It may be configured to surround the converging body along the entire circumference of the opening.

Examples of the present invention will be described below.
In Examples, a hollow fiber membrane module having the same structure as that of the above embodiment was manufactured as follows.

  1500 hollow fiber membranes (outer diameter: 2800 μm) made of polyvinylidene fluoride cut to a length of 2000 mm were prepared. Next, a polyethylene container having a length of 1154 mm, a width of 26 mm, a depth of 55 mm, and a thickness of 2 mm is prepared, and an elastic body made of ethylene propylene having a length of 1150 mm, a width of 3 mm, and a height of 30 mm is provided on both sides below the inner wall of the container. A rubber sheet (hardness: Shore A hardness 70 degrees after 10 seconds) was placed.

  Next, the tip of the converging body of the hollow fiber membrane is placed in the container, and a polyurethane resin as a fixing resin (Nippon Polyurethane, Nippon Run 4224/4403, hardness at curing: Shore A hardness after 10 seconds) 97 degrees) was injected to cure the resin. After curing, the container was removed to form a fixing resin part integrated with the rubber sheet.

  Moreover, the same operation | work was performed also about the other end of the hollow fiber membrane, and the convergence body of the hollow fiber membrane which has the resin part for fixation integrated with the rubber sheet was created.

  Next, the fixing resin portions at both ends were cut to a length of 25 mm from the end portions. At this time, the rubber sheet integrated with the fixing resin portion is cut together. As a result, the remaining part of the rubber sheet becomes an elastic body. Thereby, the convergence body of the hollow fiber membrane which has the resin fixing | fixed part to which the elastic body was adhere | attached and the end surface of each hollow fiber membrane was opened was obtained.

  Next, prior to disposing the fixing resin portion on the housing of Dialac EX18Z (manufactured by UMG ABS Co., Ltd.), an adhesive resin (polyurethane resin (Huntsman Advanced Materials) is formed on the step portion of the housing opening. Araldaite 3018B / 2023 manufactured by Co., Ltd., hardness after curing: Shore A hardness 40 degrees after 10 seconds) was applied quantitatively using a syringe so as not to sag, and thickened for about 5 minutes. The fixing resin part was placed on the step part and left for about 12 hours, after which urethane resin (Nippon Polyurethane, Nipponran 4224/4403) was injected and cured so as to fill the housing and between the hollow fiber membranes. In addition, the same operation is performed on the other end surface, and the fixing resin portion composed of the fixing resin portion and the adhesive resin is used. A hollow fiber membrane module in which an elastic body was provided was obtained.

  The both ends of the housing of the hollow fiber membrane module manufactured in this way were supported, and the amount of bending downward of the central portion of the housing was measured with reference to the line connecting the ends. As a result, the amount of bending of the housing was 10 mm, and no cracking or peeling occurred in the housing and the fixing resin portion.

  Next, for the pressure resistance test, the hollow fiber membrane of the manufactured hollow fiber membrane module was cut leaving a length of 20 mm, and the membrane surface and end surface of the cut hollow fiber membrane were made of urethane resin (Nippon Polyurethane). A hollow fiber membrane module test body was produced that was completely sealed with NIPPORAN 4224/4403). In this hollow fiber membrane module test body, the internal space of the housing is sealed except for the passage.

  In conducting the pressure resistance test, water was filled into the internal space of the housing with a syringe, and a hose connected to a test pump (K-100, manufactured by Kyowa Corporation) was connected to the pipe passage. And when water pressure was applied to the internal space of the housing by the test pump, when the water pressure reached 1.2 MPa, peeling occurred between the housing and the fixing resin portion, resulting in destruction.

(Comparative example)
The hollow fiber membrane module of the comparative example has the same structure as the hollow fiber membrane module manufactured in the example except that the elastic body is not provided in the fixing resin portion in the space sandwiched between the housing and the converging body.
When the amount of bending of the housing of the hollow fiber membrane module of the comparative example was measured in the same manner as in the above example, the amount of bending was 10 mm, and peeling between the housing and the fixing resin portion was observed.
Then, when water pressure was applied to the internal space of the housing in the same manner as in the above example, when the water pressure reached 0.9 MPa, peeling occurred between the housing and the fixing resin portion, resulting in destruction.

  Therefore, from the comparison between the above-described embodiment and the comparative example, it is possible to suppress the separation of the housing and the fixing resin due to the bending and to provide a sealing resin by providing an elastic body in the resin portion without increasing the bending rigidity of the housing itself. It can be seen that the pressure resistance performance of the hollow fiber membrane module could be greatly improved by preventing damage to itself.

It is a schematic perspective view which shows the structure of the flat type hollow fiber membrane module of preferable embodiment of this invention. It is a fragmentary sectional view along the II-II line of FIG. It is a fragmentary sectional view in alignment with the III-III line of FIG. It is sectional drawing of the housing along the II-II line | wire of FIG. FIG. 3 is a sectional view of the housing along the line III-III in FIG. 1. It is drawing explaining the manufacturing method of the hollow fiber membrane module of this embodiment. It is drawing explaining the manufacturing method of the hollow fiber membrane module of this embodiment. It is drawing explaining the other manufacturing method of the hollow fiber membrane module of this embodiment.

Explanation of symbols

1: Hollow fiber membrane module 2: Hollow fiber membrane 3: Converging body 4: Housing 4a: Stepped portion 4b: Inner wall portion 5: Inner space 6: Through passage 7: Fixing resin portion 8: Adhesive resin portion 9: Elastic body 10: Potting container

Claims (3)

A flat hollow fiber membrane module,
A converging body bundled with a plurality of hollow fiber membranes having an elongated rectangular cross section;
An elongated housing having an elongated opening into which the end of the converging body is inserted and fixed;
The ends of the hollow fiber membranes of the converging body inserted into the opening of the housing are mutually connected in a state where the open ends of the hollow fiber membranes open toward the internal space through which the processing liquid in the housing passes. A fixing resin portion for fixing to the inner wall of the housing and sealing the space between the end portions of each hollow fiber membrane and the space between the end portion of each hollow fiber membrane and the inner wall of the housing; ,
An elastic body arranged on the outer peripheral surface of the fixing resin portion so as to extend along the longitudinal direction of the housing,
The elastic body is bonded to the inner wall of the housing with an adhesive resin;
A hollow fiber membrane module characterized by the above. The elastic body is made of a material that is softer than the material constituting the fixing resin part and has a Shore A hardness of 10 to 80 degrees after 10 seconds.
The hollow fiber membrane module according to claim 1. The elastic body is disposed in a belt shape along the inner wall between the converging body and the inner wall in the longitudinal direction of the housing.
The hollow fiber membrane module according to claim 1 or 2.

Images