JP2003135935A - Method for manufacturing hollow fiber membrane module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a hollow fiber membrane module, by which a stable potting part can be formed so that a potting resin does not clog the opening of the end face 2 of a hollow fiber membrane 3 but infiltrate into the space among the membranes 3 satisfactorily regardless of the density of the membrane 3 to be used while dispensing with a step to cut the fixed tip part of the membrane 3 after the potting part is formed. SOLUTION: This method for manufacturing the hollow fiber membrane module comprises two steps to form the potting part consisting of two parts 11 and 12, namely, a step to form a potting part 11 by a first injection and filling of the potting resin after the tip part of the membrane 3 having the opening on the end face 2 is inserted in a housing 1 and a step to form another potting part 12 by a second injection and filling of the potting resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a hollow fiber membrane module that can be suitably used for liquid filtration and the like.

[0002]

Hollow fiber membrane modules have been used in a wide range of fields such as the production of sterile water, drinking water, high-purity water, etc., or the purification of air. In recent years, in addition to these microfiltration applications, sewage While being applied to highly polluted water treatment applications such as secondary and tertiary treatments at treatment plants, solid-liquid separation in septic tanks, solid-liquid separation of SS components (suspended substances) in industrial wastewater, etc. is there.

A hollow fiber membrane module suitably used for filtering the highly polluted water is disclosed in, for example, Japanese Patent Laid-Open No. 5-2.
61253, JP-A-6-342, and JP-A-6
No. 340, etc., a hollow fiber membrane module housing made of a tubular body having a substantially rectangular cross-section having a hollow portion for collecting water therein is provided with a distal end portion in the fiber axis direction of the hollow fiber membrane. Hollow fiber membrane module in which the end portion in the fiber axis direction of the hollow fiber membrane is opened by cutting the fixed end portion of this hollow fiber membrane after sealing and fixing the end portion with a potting resin. Is mentioned.

In this hollow fiber membrane module, the end portion of the hollow fiber membrane is sealed and fixed to the housing by potting resin, and then the fixed end portion of the hollow fiber membrane is cut to open the end surface. Therefore, it is necessary to use a large-diameter housing as the housing for the hollow fiber membrane module, which not only increases the cost but also reduces the fixing strength of the hollow fiber membrane due to the cutting of the fixed end. Also has.

Further, the hollow fiber membrane module may require a jig for holding the hollow fiber membrane in a stable state when the potting resin is injected into the resin injecting portion, and the operation therefor is complicated. Is.

Further, since this hollow fiber membrane module uses a hollow fiber membrane module housing having a large diameter, when a plurality of the hollow fiber membrane modules are combined to form a hollow fiber membrane module unit, There is also a drawback that the installation space of one hollow fiber membrane module becomes large and the number of hollow fiber membrane modules that can be installed in the hollow fiber membrane module unit is limited.

Japanese Unexamined Patent Publication No. 10-57775 discloses a hollow fiber membrane module using a cylindrical hollow fiber membrane module housing as a hollow fiber membrane module for solving the above-mentioned problems. Also, Japanese Patent Laid-Open No. 2000-84373
In the publication, as a hollow fiber membrane module capable of increasing the number of hollow fiber membrane modules that can be installed in the hollow fiber membrane module unit, a hollow fiber membrane module using a hollow fiber membrane module housing having a substantially U-shaped cross section is disclosed. Is explained.

In the hollow fiber membrane module disclosed in Japanese Patent Laid-Open No. 10-57775, 2000-84373, etc., an end face in the fiber axis direction is opened in a slit provided in the hollow fiber membrane module housing. After inserting the end portion of the hollow fiber membrane, the hollow fiber membrane is positioned so that the open end surface of the hollow fiber membrane is located in the hollow portion for collecting water in the housing, and then the resin is injected on both sides partitioned by the hollow fiber membrane. It is obtained by injecting and filling potting resin into the part and solidifying it, and in the method for producing this hollow fiber membrane module, the end portion of the hollow fiber membrane was sealed and fixed to the housing by the potting resin. There is no need for a subsequent cutting step of the fixed end, which allows the use of smaller diameter housings.

However, in the method for manufacturing a hollow fiber membrane module according to the above process, if the viscosity of the potting resin to be injected and filled in the resin injection portion is low, the inside of the housing may be changed depending on the density of the hollow fiber membrane inserted into the housing. Since resin dripping that covers the hollow fiber membrane occurs and the opening of the end surface of the hollow fiber membrane is closed, there arises a problem that the hollow fiber membrane module has a reduced water permeability. On the other hand, if the potting resin injected and filled in the resin injecting part has a high viscosity, the potting resin does not sufficiently sneak between the hollow fiber membranes, so that an internal void is formed in the potting part, which causes a leak. There is a problem that becomes.

A membrane module manufacturing method has been proposed in which the potting resin is injected and filled in two steps, a front stage and a rear stage. However, conventional potting is performed in which the potting resin is injected and filled in two stages. The purpose of the method is to protect the membrane-resin interface, improve the cutability of the fixed end,
It is not intended to prevent the peeling between the housing and the membrane, but to solve the above-mentioned problems such as the resin dripping of the potting resin and the potting resin not sufficiently flowing between the hollow fiber membranes.

For the purpose described above, for example, Japanese Patent Publication No. 4-10374 discloses a resin having a hardness of 65 or less as one of the resins when the potting resin is injected and filled in two steps. As described above, the potting portion made of such a potting resin has a relatively low hardness, and the pressure resistance becomes insufficient, especially when the hollow fiber membrane module housing having a substantially rectangular cross section is used. There is.

[0012]

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to eliminate the need for a step of cutting the fixed end after the end of the hollow fiber membrane is sealed and fixed to the housing by potting resin, and the hollow fiber is not required. When the membrane is fixed to the hollow fiber membrane module housing by potting resin, regardless of the density of the hollow fiber membrane to be used, etc., resin sagging that closes the opening of the end surface of the hollow fiber membrane does not occur,
At the same time, the potting resin having an internal void is not formed due to the potting resin not wrapping sufficiently between the hollow fiber membranes, and the potting resin is accurately injected into the resin injection portion in a good condition. An object of the present invention is to provide a method for manufacturing a hollow fiber membrane module having a high quality potting portion which is filled.

[0013]

The above-mentioned problems can be solved by the method for producing a hollow fiber membrane module of the present invention having the constitution described below. That is, the method for producing a hollow fiber membrane module of the present invention is such that after inserting the end portion of the hollow fiber membrane having at least one end face in the fiber axis direction opened into the hollow fiber membrane module housing, the resin is injected into the resin injection portion. By injecting and filling potting resin,
In the method for producing a hollow fiber membrane module, wherein the hollow fiber membrane is fixed to the hollow fiber membrane module housing with a potting resin while maintaining the open state of the end face in the fiber axis direction of the hollow fiber membrane, a potting resin is applied to the resin injection part. The step of injecting and filling the hollow fiber membrane with the first step of injecting and filling the potting resin with the hollow fiber membrane into the housing for the hollow fiber membrane module, and the second step of injecting and filling the hollow fiber membrane with the hollow fiber membrane. Is fixed to the hollow fiber membrane module housing in two steps.

In the method for manufacturing a hollow fiber membrane module of the present invention having the above-mentioned structure, the potting resin injected by the first filling and filling has a viscosity of 3,000 to 10,000 mPa · s, and the second potting. The viscosity of the potting resin injected by resin injection and filling is 500 to 3000 mPa · s, and the viscosity of the potting resin injected by the second injection and filling is the first injection of potting resin, It is preferably lower than the viscosity of the potting resin injected by filling.

Further, in the method for manufacturing a hollow fiber membrane module of the present invention having the above-mentioned constitution, the first potting resin is injected and filled so that the volume of the potting resin is 5 to 50% of the total volume of the potting resin injected. It is preferable to inject potting resin.

Further, in the method for manufacturing a hollow fiber membrane module of the present invention having the above-mentioned constitution, the hardness after solidification of the potting resin injected by the second injection and filling is 60 JIS A hardness or more. It is preferable.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION In the method for producing a hollow fiber membrane module of the present invention, after inserting the end portion of the hollow fiber membrane into the hollow fiber membrane module housing, potting resin is injected and filled in the resin injection portion. A potting part is formed by the above, and thereby the hollow fiber membrane is fixed to the hollow fiber membrane module housing, and the step of injecting and filling the potting resin into the resin injecting portion is performed in the first potting resin. A step of temporarily fixing the hollow fiber membrane to the hollow fiber membrane module housing by injection and filling;
This is carried out in two steps including the step of fixing the hollow fiber membrane to the hollow fiber membrane module housing by the second injection and filling of the potting resin.

[FIG. 1] is a sectional end view showing an example of one portion of a hollow fiber membrane module obtained by the method for producing a hollow fiber membrane module of the present invention, and [FIG. 2] is [FIG. [Fig. 1] and [Fig. 2] in the first step of the method for producing a hollow fiber membrane module according to the present invention. In the hollow fiber membrane module housing 1 comprising a tubular body having an open portion along the length direction, a hollow fiber by a hollow fiber membrane 3 having an end face 2 opened from the open portion of the housing 1. The end of the membrane bundle 4 is inserted.

The hollow fiber membrane module housing 1
Is a laterally long tubular body having a substantially U-shaped cross section and having a release portion along the lengthwise direction, and the inner circumferential wall surface of which runs in the longitudinal direction of the tubular body. The projecting portion 6 for forming the hollow portion 5 for collecting water is provided with a slit 7 opening along the hollow portion 5 for collecting water.

The end portion is inserted from a recess formed by the upper surface of the projecting portion 6 for forming the hollow portion 5 for collecting water and the inner peripheral wall surface of the housing 1, that is, the slit 7. The concave portion between the hollow fiber membrane bundle 4 and the inner peripheral wall surface of the housing 1 is a resin injection portion 8 of potting resin.
The upper portion of the wall portion having a substantially U-shaped cross section is expanded outward in the length direction of the housing 1 to form a dam portion 9 parallel to the slit 7.

Into the slit 7 of the hollow fiber membrane module housing 1, the end portion of the hollow fiber membrane bundle 4 consisting of a large number of hollow fiber membranes 3 whose end faces 2 are opened is inserted, and the hollow fiber membrane bundle is inserted. The end portion of the end portion 4 of the hollow fiber membrane 4, that is, the end surface 2 of the hollow fiber membrane 3 is positioned in the hollow portion 5 for collecting water, and the slit 7 holds the end portion of the hollow fiber membrane bundle 4.

In the above step, a hollow fiber membrane bundle 4 obtained by cutting the end portion of the hollow fiber membrane 3 and bundling a large number of hollow fiber membranes 3 having the end faces 2 opened in advance is used. But
After bundling a large number of hollow fiber membranes 3 into a hollow fiber membrane bundle 4, the end portion of the hollow fiber membrane 3 on the side to be inserted into the housing 1 may be cut and the end surface 2 may be opened. Is.

After inserting the end portion of the hollow fiber membrane bundle 4 into the slit 7, a side plate forming a terminal portion in the longitudinal direction of the housing 2 made of a horizontally long tubular body having a substantially U-shaped cross section is attached to the side plate [Fig. ], The water collecting port indicated by reference numeral 10 is attached. The water collecting port 10 communicates with an external water collecting pipe,
You may attach after forming a potting part by pouring resin filling and filling in two steps mentioned later.

Subsequently, in the second step of the method for manufacturing a hollow fiber membrane module of the present invention, the hollow fiber membrane bundle 4 having its end portion inserted in the slit 7 and the concave portion between the inner peripheral wall surface of the housing 1 are removed. The potting resin is injected and filled into the resin injecting portions 8 and 8 to be formed, and the hollow fiber membrane bundle 4 is fixed to the hollow fiber membrane module housing 1 by the potting resin.

In the method for manufacturing a hollow fiber membrane module of the present invention, the step of injecting and filling potting resin into the resin injecting portions 8 and 8 is performed by the first injection and filling of potting resin to form the hollow fiber membrane 3. It is carried out in two steps: a step of temporarily fixing to the hollow fiber membrane module housing 1 and a step of fixing the hollow fiber membrane 3 to the hollow fiber membrane module housing 1 by the second injection and filling of potting resin. Yes, by the first injection and filling of the potting resin, a resin layer to be a potting portion indicated by reference numeral 11 in FIG. 1 is formed, and by the second injection and filling of the potting resin, [FIG. ], A hollow fiber membrane of the type as shown in FIG. Get joules 13.

At the time of the first injection and filling of the potting resin and the second injection and filling of the potting resin, the viscosity of the potting resin injected by the first injection and filling of the potting resin is 3000 to
The viscosity of the potting resin to be injected by the second injection and filling of potting resin is 500 to 3000 mPa.s, and the viscosity of the potting resin which is injected by the second injection and filling of the potting resin. Is preferably lower than the viscosity of the potting resin injected by the first injection and filling of the potting resin.

That is, in the first injection and filling of the potting resin, the viscosity of the injected potting resin is set to 30.
The potting resin between the hollow fiber membranes 3 is made in the range of 00 to 10000 mPa · s and is higher than the viscosity of the potting resin injected by the second injection and filling of the potting resin. It is possible to allow the resin to wrap around to some extent, and to prevent resin dripping that would block the opening of the end face 2 of the hollow fiber membrane 3.

Next, the second injection of potting resin,
In filling, the potting resin to be injected has a viscosity of 500 to
By setting the viscosity within the range of 3000 mPa · s and lower than the viscosity of the potting resin injected by the first injection and filling of the potting resin,
First potting resin injection, enabling the potting resin to wrap around into the small voids between the hollow fiber membranes 3 that did not wrap around due to filling, and permeating the potting resin between the hollow fiber membranes 3 It is desirable to prevent the creeping up due to.

The first injection of potting resin,
When the same resin is used as the potting resin in the filling and the second injection and filling of the potting resin, by changing the temperature of the potting resin during the injection and filling in each step, Second
Injecting the potting resin from the first time and making a difference in the viscosity of the potting resin injected at the time of filling, or by making a difference in the elapsed time until the potting resin is injected and prepared after the potting resin is prepared, A difference may be caused in the viscosity of the potting resin injected during the second injection of the potting resin and the second injection.

The potting resin injected by the second injection and filling of the potting resin retains the module form of the hollow fiber membrane module obtained by solidifying the potting resin. In order to reduce the deformation of the hollow fiber membrane that occurs after solidification, pressure resistance is not significantly affected, for example, the hardness of the resin after solidification is JIS A
The hardness is 60 or more, preferably 70 or more.

In addition, the first injection of potting resin,
By filling the resin injecting parts 8 and 8, 5 to 50% of the total volume of the potting resin to be injected and filled is injected and filled, and the first potting resin is injected and filled. End face 2 of hollow fiber membrane 3
Without causing resin dripping to block the opening of
Moreover, the hollow fiber membrane 3 is used as the housing 1 for the hollow fiber membrane module.
It is preferable to securely temporarily fix it.

Regarding the interval between the end of the first potting resin injection and filling and the second injection of the potting resin and the start of filling, the first potting resin injection and filling were performed. It is desirable to start the second injection and filling of the potting resin after solidification of the potting resin has started and its viscosity has risen.

In the method for manufacturing a hollow fiber membrane module of the present invention, the hollow fiber membrane module housing is preferably one having mechanical strength and durability, such as polycarbonate, polysulfone, polyolefin,
A molded body made of PVC, acrylic resin, ABS resin, modified PPE, or the like is suitable.

When it is necessary to incinerate the hollow fiber membrane module obtained by the method for producing the hollow fiber membrane module after its use, a hydrocarbon-based system that can be completely burned without producing toxic gas It is desirable to use the resin-made hollow fiber membrane module housing.

As the hollow fiber membrane, for example, a cellulose type,
Polyolefin type, polyvinyl alcohol type, PMMA
System, polysulfone system, fluorine system (PTFE, PVDF
Etc.) can be used, but a hollow fiber membrane made of a material having a high strength and elongation such as polyethylene is preferable. The hollow fiber membrane is not particularly limited in its pore diameter, porosity, membrane thickness, outer diameter of the hollow fiber, etc. as long as it can be used as a filtration membrane.

The hollow fiber membrane to be inserted into the hollow fiber membrane module housing is obtained by simply aligning the hollow fiber membranes, bundling the hollow fiber membranes, knitted fabric in which the hollow fiber membranes are wefts or warps, or the knitted fabric. It is a laminated body in which several pieces of cloth are laminated.

Since the potting resin is for fixing the hollow fiber membrane to the hollow fiber membrane module housing to make the housing and the hollow fiber membrane liquid-tight, a resin having relatively high viscoelasticity is preferable, For example, epoxy resin, unsaturated polyester resin, polyurethane resin, silicone-based filler, various hot melt resins and the like are suitable.

According to the method for producing a hollow fiber membrane module of the present invention comprising the steps as described above, the specifications of the filtration membrane or the element using the same can be applied to filtration membranes such as flat membranes other than hollow fiber membranes. It may be applicable depending on the structure.

[0039]

EXAMPLES The specific constitution of the method for producing a hollow fiber membrane module of the present invention will be described below based on examples.

Example 1 In [FIG. 1] and [FIG. 2], the total length 100 in the longitudinal direction is 100.
0 mm, the height of the dam portion 9 is 7 mm, the distance between the tip surface of one dam portion 9 and the other dam surface 13 mm is 13 mm, and the width of the slit 7 is 0.8 mm for an ABS resin hollow fiber membrane module Using the housing 1, a hollow fiber membrane module of the type indicated by reference numeral 13 in FIG. 3 was obtained.

That is, at the slit 7 of the hollow fiber membrane module housing 1, the end portion of the hollow fiber membrane bundle 4 formed by the hollow fiber membrane 3 having the end face 2 opened is connected to the hollow fiber membrane 3
The end face 2 was inserted into the housing 1 so that the end face 2 was located in the hollow portion 5 for collecting water.

The hollow fiber membrane bundle 4 contains Mitsubishi Rayon.
Polyethylene hollow fiber membrane 3 (fractionation performance 0.4
μm, outer diameter 540 μm) 132 pieces / inch and a knitted fabric made of a restraining yarn made of polyester filament yarn
One module was used per module.

Subsequently, water collecting ports 10 and 10 shown in FIG. 3 are attached to the side plates on both sides which form the end portion of the housing 1 in the longitudinal direction, and then the end portions thereof are inserted into the slits 7. A potting resin made of polyurethane resin (manufactured by Nippon Polyurethane Co., Ltd.) is injected, filled, and solidified into the resin injecting portions 8 and 8 formed by the concave portion between the hollow fiber membrane bundle 4 and the inner peripheral wall surface of the housing 1. Thus, a hollow fiber membrane module of the type indicated by reference numeral 13 in [FIG. 3] was obtained.

The potting resin is injected and filled at a room temperature by injecting a polyurethane resin having a viscosity of 3000 mPa · s (manufactured by Nippon Polyurethane Co., Ltd.) at room temperature and then injecting and filling the resin injection parts 8 and 8. Injecting and filling the first potting resin that fills 25% of the total volume of the potting resin, and injecting polyurethane resin (manufactured by Nippon Polyurethane Co., Ltd.) with a viscosity of 800 mPa · s at ordinary temperature at ordinary temperature. The second injection and filling of the potting resin for filling the parts 8 and 8 with 75% of the total volume of the potting resin to be injected and filled are completed after the first injection and filling of the potting resin. The second injection of the potting resin was started after the solidification of the potting resin was started.

Then, by the injection and filling of the potting resin, the potting portion by the first injection of the potting resin indicated by reference numeral 11 in FIG. 1 and the second potting resin by the reference numeral 12 are introduced. A potting part consisting of a potting part by injection was formed.

A repeated pressure resistance test was performed on the ten hollow fiber membrane modules 13 obtained by the above steps, and all of the ten hollow fiber membrane modules 13 have sufficient pressure resistance performance. I was able to confirm that. or,
In none of the ten hollow fiber membrane modules 13 was there any resin sagging that blocked the opening of the end face 2 of the hollow fiber membrane 3.

Example 2 In the process described in Example 1, the potting resin was injected and filled by injecting a polyurethane resin (manufactured by Nippon Polyurethane Co., Ltd.) having a viscosity of 2000 mPa · s at room temperature at room temperature. Injecting and filling parts 8 and 8 with 25% of the total volume of the potting resin that is to be injected and filled, and injecting and filling the potting resin for the first time and the viscosity at room temperature 2
75% of the total volume of the potting resin that is planned to be injected and filled into the resin injection parts 8 and 8 by heating the polyurethane resin of 000 mPa · s (manufactured by Nippon Polyurethane Co., Ltd.) to a viscosity of 800 mPa · s. The second injection of potting resin, the filling and the second injection of the potting resin after the first injection of the potting resin and the solidification of the filled potting resin after the completion of filling Otherwise, the procedure was the same as that described in Example 1 except for the above, to obtain a hollow fiber membrane module of the type indicated by reference numeral 13 in FIG.

A repeated pressure resistance test was performed on the ten hollow fiber membrane modules obtained by the above process, and it was confirmed that all of the ten hollow fiber membrane modules 13 had sufficient pressure resistance performance. Was confirmed. Further, in none of the ten hollow fiber membrane modules 13 was there any resin dripping that blocked the opening of the end face 2 of the hollow fiber membrane 3.

Comparative Example 1 In the process described in Example 1, the potting resin was injected and filled by injecting a polyurethane resin (manufactured by Nippon Polyurethane Co., Ltd.) having a viscosity of 3000 mPa · s at room temperature at room temperature. Otherwise, the procedure is the same as that described in the first embodiment, and the reference numeral 13 is used in FIG.
A hollow fiber membrane module of the type shown by was obtained.

Observation of the ten hollow fiber membrane modules thus obtained revealed that none of the ten hollow fiber membrane modules was dripping resin to close the opening of the end face of the hollow fiber membrane. However, there was a portion where the potting resin did not wrap around between the hollow fiber membranes, and a leak occurred in any of the 10 hollow fiber membrane modules.

Comparative Example 2 In the process described in Example 1, the potting resin was injected and filled by injecting a polyurethane resin (made by Nippon Polyurethane Co., Ltd.) having a viscosity of 1000 mPa · s at room temperature at room temperature. Otherwise, the procedure is the same as that described in the first embodiment, and the reference numeral 13 is used in FIG.
A hollow fiber membrane module of the type shown by was obtained.

Observation of the obtained 10 hollow fiber membrane modules revealed that resin dripping that closed the opening of the end face of the hollow fiber membrane occurred in all of the 10 hollow fiber membrane modules. The hollow fiber membrane module has a reduced

[0053]

According to the method for producing a hollow fiber membrane module of the present invention, the hollow fiber membrane is housed with a potting resin while maintaining the open state of at least one end face of the hollow fiber membrane in the fiber axis direction. The step of injecting and filling the potting resin when fixing it to the first step is the step of temporarily fixing the hollow fiber membrane to the housing for the hollow fiber membrane module by injecting and filling the first potting resin, and the step of injecting the second potting resin. , Fixing the hollow fiber membrane to the hollow fiber membrane module housing by filling
This is done in stages.

Therefore, according to the method for manufacturing a hollow fiber membrane module of the present invention, there is a portion where the potting resin does not wrap around between the hollow fiber membranes depending on the density of the hollow fiber membranes used, or the end surface of the hollow fiber membranes There is no occurrence of resin dripping that blocks the opening, and a good-quality potting portion can be accurately formed regardless of the density of the hollow fiber membrane to be applied. Can be manufactured.

Further, according to the method for producing a hollow fiber membrane module of the present invention, after fixing the end portion of the hollow fiber membrane to the hollow fiber membrane module housing by potting resin,
Since it is not necessary to provide a step of cutting the fixed end of the hollow fiber membrane, it is possible to design the housing to have a small diameter.

Therefore, when the hollow fiber membrane module obtained by the method for producing a hollow fiber membrane module of the present invention is used as a module unit, a high stacking rate per unit volume can be set to realize a high filtration capacity. Therefore, the hollow fiber membrane module unit can efficiently perform solid-liquid separation such as sewage treatment and industrial wastewater treatment.

[Brief description of drawings]

FIG. 1 is a perspective view showing an example of a hollow fiber membrane module obtained by a method of the present invention with a side plate forming a terminal portion of a housing removed.

FIG. 2 is a cross-sectional end view before the steps of injecting and filling a potting resin when obtaining the hollow fiber membrane module shown in FIG.

FIG. 3 is a perspective view showing an example of a hollow fiber membrane module obtained by the method of the present invention.

[Explanation of symbols]

1 ... Hollow fiber membrane module housing 2 ... Open end face 3 of hollow fiber membrane 3 ... Hollow fiber membrane 4 ... Hollow fiber membrane bundle 5 ... Water collection Hollow part 6 for water supply ... Protruding part 7 for forming hollow part 5 for collecting water ... Slit 8 ... Resin injection part 9 ... Dam section 10 ... Water collecting port 11 attached to a side plate forming a terminal portion in the lengthwise direction of the housing 1 ... A potting portion 12 formed by injecting and filling the first potting resin 12 ... A second potting resin Potting part 13 formed by injection and filling ... Hollow fiber membrane module

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Claims (4)

[Claims] 1. A hollow fiber membrane having at least one end face in the axial direction of the fiber, which is opened, is inserted into a housing for a hollow fiber membrane module at the end portion thereof, and then a potting resin is injected into the resin injection portion and filled. In the method for producing a hollow fiber membrane module, wherein the hollow fiber membrane is fixed to the hollow fiber membrane module housing by the potting resin while maintaining the open state of the end face in the fiber axis direction of the hollow fiber membrane, the resin injection part is provided. The step of injecting and filling the potting resin is performed by first injecting and filling the potting resin with the hollow fiber membrane into the housing for the hollow fiber membrane module, and then by injecting and filling the potting resin the second time. A hollow fiber membrane module characterized in that it is carried out in two steps including a step of fixing the fiber membrane to the hollow fiber membrane module housing. Manufacturing method. 2. The viscosity of the potting resin injected by the first injection and filling of the potting resin is 3000.
The viscosity of the potting resin injected by the second injection and filling of the potting resin is 500 to 3000 mPa · s, and the potting resin injected by the second injection and filling of the potting resin The method for producing a hollow fiber membrane module according to claim 1, wherein the viscosity of the potting resin is lower than the viscosity of the potting resin injected by the first injection and filling of the potting resin. 3. The potting resin of 5 to 50% of the total volume of the potting resin to be injected into the resin injecting portion is injected by the first injection and filling of the potting resin. 2. The method for producing a hollow fiber membrane module according to item 2. 4. The hardness of the potting resin injected by the second injection and filling of the potting resin after the solidification is JIS A hardness 60 or more, according to any one of claims 1 to 3. 2. The method for producing a hollow fiber membrane module according to item 1.