JP2013009947A - Hollow fiber type filter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hollow fiber type filter which is enhanced in the pressure-resistance rigidity of sealing between the end of a casing body and ends of a lid members, and a method of manufacturing the hollow fiber type filter.SOLUTION: The hollow fiber type filter 100 comprises: a hollow fiber bundle 30; the casing body 20 which fixes the hollow fiber bundle 30 to at least one end opening of a cylinder 22 for the casing body by a first sealing part 24 which is composed of a first sealant so as to have a cut opening end face of the hollow fiber bundle 30; the lid members 10 which are attached to both ends of the casing body 20 and have fluid lead-out inlets 12; and a second sealing part 40 which is composed of a filling part in which a space formed between an external peripheral region of the cut opening end face of the hollow fiber bundle 30 and a connection region of the end of the casing body 20 and the end of the lid members 10 is filled with a second sealant and a continuous membrane which extends at least at a part of internal faces of the lid members from the filling part and adheres to the internal face of the lid members.

Description

  The present invention relates to a hollow fiber filter and a method for producing a hollow fiber filter.

  2. Description of the Related Art Conventionally, for example, a hollow fiber type filter including a hollow fiber bundle includes a casing main body, a hollow fiber bundle loaded in the casing main body, and a lid member that is attached to both ends of the casing main body and includes a fluid outlet inlet. When the lid member is attached to each end of the casing body, the seal body is attached between the casing body and the lid member.

  For example, Patent Document 1 discloses a hollow fiber device in which a hollow fiber bundle is attached to an enclosure as a casing body, and a transverse partition that is provided on the enclosure and fixes each end of the hollow fiber bundle. Is provided with at least one annular groove, while the inner surface of the cover closing each end of the enclosure is provided with at least one annular rib engaging the at least one annular groove; Furthermore, it is described that a seal containing a resin-based material is disposed in a gap formed between the groove and the rib.

  As a method not using such a seal ring, a method of ultrasonic welding the casing body and the lid member has been put into practical use. For example, using an ultrasonic welding method, the end of the resin casing body and the resin lid member are brought into pressure contact, and by applying ultrasonic waves to this contact surface, the molten resins are bonded to each other, Thereby, the casing main body and the lid member are joined.

  However, in the case of the sealing method using the ultrasonic welding method, the sealing region formed at the end portion of the casing body exists substantially on the outer peripheral side of the cut opening end face of the hollow fiber bundle fixed to the casing body by the sealant. To do. As a result, a space is formed in the outer peripheral region of the cut opening end surface of the hollow fiber bundle, and there is a possibility that residual blood is generated in the space.

  Therefore, in order to liquid-tightly seal the casing body and the lid member, in Patent Document 2, the hollow fiber bundle is fixed to one end opening of the casing body with a sealant so as to have a cut opening end surface of the hollow fiber bundle. A lid member formed by filling an adhesive into an annular groove provided on the inner side surface is attached to one end opening of the casing main body, thereby forming the end surface of the casing main body and / or a sealing agent. It has been proposed to seal the outer peripheral area of the cut opening end face of the hollow fiber bundle and the lid member in an annular shape with an adhesive.

Japanese Patent No. 3254222 Japanese Patent No. 2936456

  When a hollow fiber type filter is used, for example, as a dialysate filter attached to an artificial kidney dialysis machine, a large amount of dialysate passes through the hollow fiber type filter, resulting in an increase in the internal pressure of the hollow fiber type filter. A pressure load is applied to the lid member provided with the outlet and the sealing region between the casing body and the lid member. Furthermore, when the internal pressure of the hollow fiber filter is excessively increased, the lid member and the sealing region are easily damaged.

  The present invention has been made in view of the above situation, a sealing region formed at an end portion of a casing body, and a cut opening end surface region of a hollow fiber bundle fixed to the casing body with a sealant. Of the hollow fiber type filter and the hollow fiber type filter, which reduces the pressure receiving area applied to the lid member and increases the pressure resistance of the sealing between the end of the casing body and the end of the lid member It aims to provide a method.

  As a result of intensive studies to solve the above problems, the present inventors have completed the present invention shown below. The present invention has the following features.

  (1) A hollow fiber bundle, a casing main body in which the hollow fiber bundle is fixed to at least one end opening of the casing main body cylinder with a first sealant so as to have a cut open end surface of the hollow fiber bundle, and a casing Between the lid members respectively provided with fluid outlets, which are respectively attached to both ends of the main body, the outer peripheral region of the cut opening end surface of the hollow fiber bundle, and the connection region between the end of the casing main body and the end of the lid member A hollow fiber filter having a filling portion formed by filling the formed space with a second sealing agent, and a continuous film that extends from the filling portion to at least a part of the inner surface of the lid member and adheres to the inner surface of the lid member. It is.

  (2) The hollow fiber filter according to (1), wherein the first sealant, the second sealant, and the constituent material of the continuous film are the same material or the same kind of material.

  (3) The connection between the end of the casing body and the lid member is the hollow fiber filter according to the above (1) or (2), which is melt-bonded using an ultrasonic welding method.

  (4) A pair of lid members at both ends of the casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with the first sealant so as to have a cut opening end face of the hollow fiber bundle. The second sealing agent is introduced along the inner surface of the lid member from the fluid outlet provided in the lid member while rotating around the central axis of the casing body. A process for producing a hollow fiber filter having a process.

  (5) The step of introducing the second sealing agent is performed by maintaining the central axis of the casing body in the horizontal direction and rotating from the fluid outlet provided in the lid member while rotating about the central axis of the casing body. It is a manufacturing method of the hollow fiber type filter as described in said (4) which is a process which introduces the sealing agent of 2 along the inner surface of a cover member.

  (6) In the step of introducing the second sealant, the central axis of the casing body is maintained in the vertical direction, the leading end surface is blocked at the fluid outlet provided in the lid member, and the outer surface of the leading end portion A second sealing agent introduced into the injection nozzle by the centrifugal force is attached through the opening of the injection nozzle while the injection nozzle having the opening formed therein is mounted and rotated around the central axis of the casing body. The hollow according to (4), which is a step of introducing along the inner surface of the member between the connection region between the end of the casing body and the end of the lid member and the outer peripheral region of the cut opening end surface of the hollow fiber bundle. It is a manufacturing method of a thread type filter.

  (7) Further, the step of connecting the end of the casing body and the end of the lid member is the hollow according to any one of the above (4) to (6) in which fusion bonding is performed using an ultrasonic welding method. It is a manufacturing method of a thread type filter.

  (8) The ultrasonic welding method is a method for producing a hollow fiber filter according to the above (7), which is selected from a shear joint method, an energy direct joint method, or a combination thereof.

  (9) Further, in the step of connecting the end of the casing body and the end of the lid member, a male screw formed on the outer peripheral surface of the casing main body and a female screw formed on the inner peripheral surface of the lid member are screwed together. By this, it is a manufacturing method of the hollow fiber type filter as described in any one of said (4) to (6) which connects the edge part of a casing main body, and a cover member.

  According to the hollow fiber type filter of the present invention, the second space is formed in the space formed between the outer peripheral region of the cut opening end surface of the hollow fiber bundle and the connection region between the end of the casing body and the end of the lid member. Since the filling part formed by filling the sealant is provided, the pressure receiving area to the lid member is reduced as the casing body internal pressure increases during filtration. Thereby, deformation and breakage of the lid member due to excessive pressure reception are suppressed. Further, since a continuous film is formed that extends from the filling portion to at least a part of the inner surface of the lid member and adheres to the inner surface of the lid member, even if the shape of the lid member changes due to fluctuations in internal pressure during filtration, The continuous film follows, and as a result, the continuous film plays a role of reinforcing the adhesion of the filling portion and increases the pressure resistance of the lid member.

  According to the method for manufacturing a hollow fiber filter of the present invention, the second sealant is introduced from the fluid outlet through the inner surface of the lid member while rotating about the central axis of the casing body. Then, the second sealant is filled in the space formed between the outer peripheral region of the cut opening end surface of the hollow fiber bundle and the connection region between the end of the casing body and the end of the lid member, and is filtered. The pressure receiving area to the lid member due to the increase in the casing body internal pressure at the time is reduced, deformation and breakage of the lid member due to excessive pressure reception are suppressed, and continuous from the region filled with the second sealing agent. The continuous film that extends is formed so as to adhere to the inner surface of the lid member, so that the continuous film follows even if the shape of the lid member changes due to fluctuations in internal pressure during filtration. It plays the role of adhesive reinforcement of the filling part, the lid part To enhance the breakdown voltage strength.

It is a partially cutaway sectional view which illustrates an example of the composition of the hollow fiber type filter concerning this embodiment. The part explaining the space formed between the outer peripheral area | region of the cutting opening end surface of a hollow fiber bundle and the connection area | region of the edge part of a casing main body, and the edge part of a cover member before filling with a 2nd sealing agent. It is sectional drawing. It was formed in the space formed between the outer peripheral area of the cut opening end face of the hollow fiber bundle and the connection area between the end of the casing body and the end of the lid member after filling the second sealant. It is a fragmentary sectional view explaining a 2nd sealing part. It is a figure explaining an example of the manufacturing method of the hollow fiber type filter which concerns on this Embodiment. It is a figure explaining an example of the introduction method of the 2nd sealing agent in the manufacturing method of the hollow fiber type filter concerning this embodiment. It is a figure explaining the pressure-receiving area area | region before filling with the 2nd sealing agent, and after filling. It is a figure explaining other examples of the introduction method of the 2nd sealing agent in the manufacturing method of the hollow fiber type filter concerning this embodiment.

  FIG. 1 illustrates an example of the configuration of a hollow fiber filter 100 according to the present embodiment. The hollow fiber type filter 100 includes a casing main body cylinder that includes a hollow fiber bundle 30 and a first sealing portion 24 made of a first sealant so that the hollow fiber bundle 30 has a cut open end surface of the hollow fiber bundle 30. A casing main body 20 fixed to at least one end opening of the body 22, a lid member 10 provided with both ends of the casing main body 20 and having a fluid outlet 12; and an outer periphery of a cut opening end face of the hollow fiber bundle 30 The space formed between the region and the connection region between the end of the casing body 20 and the end of the lid member 10, the filling portion filled with the second sealing agent, and the inner surface of the lid member from the filling portion And a second sealing portion 40 including a continuous film that extends at least partially and adheres to the inner surface of the lid member.

  Furthermore, the X portion surrounded by the dotted line in FIG. 1 is enlarged, and the outer peripheral area of the cut open end surface of the hollow fiber bundle 30 and the end of the casing body 20 before and after filling the second sealing agent. A difference in the configuration of the space formed between the connection portion and the connection region between the end portions of the lid member 10 will be described below with reference to FIGS. 2A and 2B.

  As shown in FIG. 2A, before filling with the second sealant, the outer peripheral area of the cut opening end surface of the hollow fiber bundle 30, the end of the casing body cylinder 22 and the end of the lid member 10 are connected. A space is formed between the region. For this reason, as shown in FIG. 4, the pressure receiving area applied to the lid member before filling with the second sealant is composed of the area of the cut opening end face of the hollow fiber bundle 30 and the area of the outer peripheral area thereof.

  On the other hand, in the present embodiment, as shown in FIG. 2B, the space 42 is filled with the second filler, and extends from the filling portion 42 to at least a part of the inner surface of the lid member. Since the second sealing portion 40 composed of the continuous film 44 adhering to the inner surface of the lid member 10 is formed, the pressure receiving area applied to the lid member is only the area of the cut opening end surface of the hollow fiber bundle 30. Therefore, since the pressure receiving area with respect to the lid member 10 is reduced, for example, when the hollow fiber filter 100 of the present embodiment is used for a dialysate filter, the force received by the lid member even when the dialysate is at a high flow rate. For example, in a dialysis machine, hot water of citric acid of about 90 ° C. flows at the time of disinfection of the dialyzer, and dialysate of about 37 ° C. flows at the time of dialysis. Provided is a hollow fiber filter having sufficient strength against so-called repetitive fluctuations in pressure such as a load or pulsation caused by a double pump. Further, in the space formed between the outer peripheral region (see FIG. 2A) of the cut opening end surface of the hollow fiber bundle 30 and the connection region between the end of the casing body cylinder 22 and the end of the lid member 10. By providing the filling portion 42 that is filled with the two sealing agents, the pressure receiving area to the lid member 10 accompanying the increase in the internal pressure of the casing body during filtration is reduced. Therefore, deformation and breakage of the lid member due to excessive pressure reception are suppressed. Further, since a continuous film 44 is formed which extends from the filling portion 42 to at least a part of the inner surface of the lid member 10 and adheres to the inner surface of the lid member 10, the shape of the lid member 10 changes in accordance with fluctuations in internal pressure during filtration. Even so, the continuous film 44 flexibly follows, and as a result, the continuous film 44 serves as an adhesive reinforcement that prevents the filling portion 42 from being peeled off. The use strength of the thread filter is maintained for a long time.

  The reduction rate of the pressure receiving area of the hollow fiber filter in the present embodiment varies depending on the inner diameter of the hollow fiber filter, but is, for example, 10% or more and 50% or less. When it is less than the lower limit of this range, the pressure receiving reduction on the lid member is insufficient, and a pressure load is applied to the lid member for a long period of time. On the other hand, when the upper limit of the above range is exceeded, there is a possibility that the cut opening end face of the hollow fiber bundle may be blocked, and the function as a filter may not be sufficiently exhibited.

  In addition, the continuous film 44 in the present embodiment is formed with 10% or more and 100% or less of the inner area of the lid member 10. By being within the above range, it plays a role of adhesion reinforcement for preventing the peeling of the filling portion 42.

  Moreover, the thickness of the said continuous membrane | film | coat 44 is 30 micrometers or more and 70 micrometers or less, for example. As a result, even if the internal pressure of the casing body is repeatedly changed, it can be sufficiently followed and adhered to the inner surface of the lid member 10 for a long period of time. In addition, the thickness of the continuous film 44 is not limited to the range of 30 to 70 μm, and the design can be appropriately changed depending on the material and type of the filler.

  In addition, the casing main body cylinder 22 of the present embodiment shown in FIG. 1 is particularly suitable as long as it can accommodate the hollow fiber bundle 30 therein and has openings to which the lid member 10 can be attached at both ends thereof. It is not limited. The material constituting the casing body cylinder 22 is not particularly limited, and for example, polycarbonate, polystyrene, a copolymer of acrylonitrile and styrene, polymethacrylate, ABS resin, and AB resin are preferable.

  The material and shape of the hollow fiber membrane forming the hollow fiber bundle 30 are not particularly limited. Examples of the material include cellulose derivatives such as cellulose ethers such as cellulose, cellulose diacetate, and cellulose triacetate, polyamide derivatives, and polyesters. Methacrylic polymers or acrylic polymers such as polymethacrylates, polymethacrylates, polyvinyl chloride polymers such as polyvinyl chloride, polyurethanes, and polyolefins such as polyethylene and polypropylene. The outer diameter of the hollow fiber membrane is, for example, about 10 μm or more and 600 μm or less.

  Although it will not specifically limit as a 1st sealing agent which forms the 1st sealing part 24 if the hollow fiber bundle 30 can be fixed to the cylinder 22 for casing main bodies, For example, a polyurethane resin, a silicone resin, an epoxy Examples thereof include curable resin compositions such as resins. In the present embodiment, a two-component curable polyurethane or a room temperature curable silicone fluid is preferably used as the first sealant from the viewpoint of sealing properties and adhesiveness.

  In the present embodiment, the hollow fiber bundle has a cut open end surface in which the hollow fiber bundle 30 is loaded into the casing main body cylinder 22 and the casing main body cylinder 22 is filled with a first sealant (hereinafter referred to as a “first sealing agent”). The sealant is solidified, and then the first sealant after solidification and the end of the hollow fiber bundle 30 are cut. The flow path is separated into a flow path inside the hollow fiber and a flow path outside the hollow fiber.

  The 2nd sealing agent which forms the 2nd sealing part 40 is the same material as the 1st sealing agent, or the same kind of material. As a result, the second sealing portion 40 also firmly adheres to the casing main body cylinder 22 and also adheres to the inner surface of the lid member 10.

  Next, an example of the manufacturing method of the hollow fiber type filter in this Embodiment is demonstrated using FIGS. 3-5.

  As shown in FIG. 3, the manufacturing method of the hollow fiber type filter in the present embodiment is configured so that the hollow fiber bundle 30 is made of the first sealing agent so that the hollow fiber bundle 30 has the cut open end face. A step of connecting the ends of the pair of lid members 10 to both ends of the casing body 20 fixed to at least one end opening of the casing body cylinder 22 by the stoppers 24, and a center axis of the casing body 20 The second sealing agent is introduced along the inner surface of the lid member 10 from the fluid outlet 12 provided in the lid member 10 while being rotated. Here, “the central axis of the casing body 20” in the present specification means a center line extending along the longitudinal direction of the casing body 20 shown in FIG.

  Furthermore, as shown in FIGS. 3 and 4A, in another method for manufacturing a hollow fiber filter of the present embodiment, the center axis of the casing main body 20 is set horizontally in the step of introducing the second sealant described above. The second sealing agent is introduced along the inner surface of the lid member 10 from the fluid outlet 12 provided in the lid member 10 while maintaining the direction and rotating around the central axis of the casing body 20.

  As a result, the second sealant introduced from the fluid outlet 12 moves along the inner surface of the lid member 10 due to gravity, and further rotates around the central axis of the casing body 20, thereby centrifugally. Force is uniformly formed between the outer peripheral area (see FIG. 2A) of the cut opening end face of the hollow fiber bundle 30 and the connection area between the end of the casing body cylinder 22 and the end of the lid member 10. A second sealing portion 40 in which the second sealing agent is filled in the space to be formed is formed. Here, as shown in FIG. 2B, the second sealing portion 40 includes a filling portion 42 in which the space is filled with the second filler, and at least a part of the inner surface of the lid member from the filling portion 42. And a continuous film 44 attached to the inner surface of the lid member. Therefore, as shown in FIG. 4B, the pressure receiving area applied to the lid member 10 by the second sealing portion 40 is only the area of the cut opening end surface of the hollow fiber bundle 30, so that the pressure receiving area for the lid member 10 is reduced. Is done. Furthermore, since the continuous film 44 that extends from the filling portion 42 to at least a part of the inner surface of the lid member 10 and adheres to the inner surface of the lid member 10 is formed by the above manufacturing method, the internal pressure during filtration (for example, during dialysis) is formed. Even if the shape of the lid member 10 changes due to the fluctuation, the continuous film 44 flexibly follows, and as a result, the continuous film 44 serves as an adhesive reinforcement that prevents the filling portion 42 from peeling, The pressure resistance of the lid member 10 is increased, and the use strength of the hollow fiber filter is maintained for a long period.

  In the manufacturing method shown in FIG. 3 and FIG. 4A, the number of rotations around the central axis of the casing body varies depending on the outer diameter of the casing body and the material of the second sealant. For example, when the second sealant is a two-component curable polyurethane, 800 rpm or more and 1500 rpm are preferable.

  In addition, as shown in FIG. 5, in the method of manufacturing the other hollow fiber filter of the present embodiment, the center axis of the casing body 20 is maintained in the vertical direction in the step of introducing the second sealant described above. The fluid outlet 12 provided in the lid member 10 is fitted with an injection nozzle 60 whose front end surface is closed and an opening is formed on the outer surface of the front end portion, and rotates around the central axis of the casing body 20. Then, the second sealing agent introduced into the injection nozzle 60 by centrifugal force is caused to follow the inner surface of the lid member 10 through the openings 62a and 62b of the injection nozzle 60, and the end of the casing body cylinder 22 is moved. It is introduced between the connection region between the end portion of the cover member 10 and the end portion of the lid member 10 and the outer peripheral region of the cut opening end surface of the hollow fiber bundle 30.

  By rotating about the central axis of the casing body 20, the second sealant introduced from the injection nozzle 60 is separated from the outer peripheral region (see FIG. 2A) of the cut opening end surface of the hollow fiber bundle 30 by centrifugal force. The space formed between the end portion of the casing main body cylinder 22 and the end portion of the lid member 10 is filled. Accordingly, as described above, the pressure receiving area for the lid member 10 is reduced as shown in FIG. 4B, and the continuous film 44 that extends to at least a part of the inner surface of the lid member 10 and adheres to the inner surface of the lid member 10 (FIG. 2B). Is also formed. Accordingly, the pressure resistance of the lid member 10 is increased, and the use strength of the hollow fiber filter is maintained for a long time.

  In the manufacturing method shown in FIG. 5, it is preferable to appropriately select the injection rate and the rotation speed of the second sealing agent so that the second sealing agent does not diffuse into the cut opening end face of the hollow fiber bundle 30. The rotational speed is preferably in the same range as described above for the convenience of production.

  Further, in the method for manufacturing a hollow fiber filter according to the present embodiment, in any of the methods of FIGS. 3 to 5, as a step of connecting the end of the casing body and the end of the lid member, Using the welding method, strong frictional heat is generated at both end portions to be joined to the end portion of the casing body made of resin and the end portion of the lid member made of resin by fine ultrasonic vibration and pressure. A process of melting and joining both ends is adopted.

  Further, the ultrasonic welding method is selected from a shear joint method, an energy direct joint method, or a combination thereof. Here, the shear joint method is an example of a joint method of a joint in a generally known ultrasonic welding method, where the joint is a partial surface contact of a slope, and the inclination angle is an ultrasonic vibration direction. It is a joint method that is at an angle that causes a rubbing movement to be performed. The energy direct joint method is also an example of a joint method for joints in the generally known ultrasonic welding method. A joint that concentrates energy on a triangular projection called a director and generates heat by repeated collisions. Is the law.

  Moreover, in the manufacturing method of the other hollow fiber type filter in the present embodiment, as a step of connecting the end of the casing body and the end of the lid member, a male screw formed on the outer peripheral surface of the casing body 20; The end of the casing body and the lid member may be connected by screwing a female screw formed on the inner peripheral surface of the lid member 10. Furthermore, regarding the connection between the casing body and the lid member, the connection by screwing and the fusion bonding by ultrasonic welding may be combined.

  EXAMPLES Hereinafter, although an Example demonstrates this invention, this invention is not limited to these Examples.

[Example 1]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member , And the ultrasonic welding by the shear joint method, as shown in FIG. 3, the central axis of the casing body is kept in the horizontal direction, and the lid member is provided while rotating around the central axis of the casing body. From the fluid outlet, the second sealant was introduced along the inner surface of the lid member with the second sealant made of two-component curable urethane. Here, in the shear joint method, the inclination angle was 45 degrees, the outer diameter of the casing body was 52 mm, and the rotation speed of the casing body was 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the cover member of the obtained hollow fiber filter was reduced by 38% compared to before filling with the second sealant.

[Example 2]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member 3 is ultrasonically welded by an energy direct joint method, and as shown in FIG. 3, the central axis of the casing body is kept in the horizontal direction, and the lid member is provided while rotating around the central axis of the casing body. From the fluid outlet, the second sealant was introduced along the inner surface of the lid member with the second sealant made of two-component curable urethane. Here, in the energy direct joint method, the angle of the triangular tip of the joint portion is set to 60 degrees, and the two-component curable urethane is the same as that used in Example 1, and the outer diameter of the casing body is also the example. As in 1, the number of rotations of the casing body was 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

[Example 3]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Are ultrasonically welded by the shear joint method and the energy direct joint method according to Example 1 and Example 2, and then the center axis of the casing body is kept in the horizontal direction as shown in FIG. While rotating about the central axis, the second sealant made of two-component curable urethane is placed along the inner surface of the lid member from the fluid outlet port provided in the lid member, and the second sealant is placed along the inner surface of the lid member. Introduced. Here, in the shear joint method, the inclination angle is 45 degrees, in the energy direct joint method, the angle of the tip of the triangle of the joint part is 60 degrees, and the two-component curable urethane is the same as that used in Example 1. Similarly, the outer diameter of the casing body was the same as that of Example 1, and the rotation speed of the casing body was 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

[Example 4]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Are ultrasonically welded by the shear joint method and the energy direct joint method according to Example 1 and Example 2, and then the center axis of the casing body is kept in the horizontal direction as shown in FIG. While rotating about the central axis, the second sealant made of two-component curable urethane is placed along the inner surface of the lid member from the fluid outlet port provided in the lid member, and the second sealant is placed along the inner surface of the lid member. Introduced. Here, in the shear joint method, the inclination angle is 45 degrees, in the energy direct joint method, the angle of the tip of the triangle of the joint part is 60 degrees, and the two-component curable urethane is the same as that used in Example 1. Similarly, the outer diameter of the casing body was the same as that of Example 1, and the rotation speed of the casing body was 1300 rpm. 10% of the second sealing agent was coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

[Comparative Example 1]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Were ultrasonically welded by the shear joint method. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was 20 cm ² . Here, in the shear joint method, the inclination angle was 45 degrees as in Example 1.

[Comparative Example 2]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Were ultrasonically welded by the shear joint method and the energy direct joint method according to Example 1 and Example 2. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was 18 cm ² . Here, in the shear joint method, the inclination angle is 45 degrees as in the first embodiment, and in the energy direct joint method, the angle of the tip of the triangle of the joint portion is set to 60 degrees as in the second embodiment.

[Conditions for strength test]
A cycle test was conducted in which 90 ° C. hot water having a concentration of 2% citric acid was repeated for 60 minutes and water was repeated for 300 minutes and poured into a hollow fiber filter. The pressure to the hollow fiber type filter in the cycle test had a pulsation of 40 kPa to 230 kPa, and was evaluated by counting the number of cycles until the occurrence of leak. The results are shown in Table 1.

  DESCRIPTION OF SYMBOLS 10 Lid member, 12 Fluid outlet | inlet, 16 Nozzle, 20 Casing main body, 22 Casing body cylinder, 24 1st sealing part, 30 Hollow fiber bundle, 40 2nd sealing part, 42 Filling part, 44 Continuous film, 50 frames, 52 screws, 60 injection nozzle, 62a, 62b opening, 100 hollow fiber type filter.

The present invention relates to a hollow fiber filter.

(1) A hollow fiber bundle, a casing main body in which the hollow fiber bundle is fixed to at least one end opening of the casing main body cylinder with a first sealant so as to have a cut open end surface of the hollow fiber bundle, and a casing Between the lid members respectively provided with fluid outlets, which are respectively attached to both ends of the main body, the outer peripheral region of the cut opening end surface of the hollow fiber bundle, and the connection region between the end of the casing main body and the end of the lid member Filling the formed space with a second sealant , and adhering to and adhering to the casing main body cylinder and the inner surface of the lid member; and from the filler to at least a part of the inner surface of the lid member attached to the inner surface of the lid member extends, wherein a continuous film for adhesion reinforcement to prevent peeling of the filling portion have a construction material of the continuous film and the first encapsulant and the second encapsulant Are hollow fiber filters that are the same material or the same material .

(2) In the above (1), the constituent material of the first sealing agent and the second sealing agent and the continuous film is a curable resin composition of any of polyurethane resin, silicone resin, and epoxy resin. It is a hollow fiber type filter of description.

As shown in FIG. 2A, before filling with the second sealant, the outer peripheral area of the cut opening end surface of the hollow fiber bundle 30, the end of the casing body cylinder 22 and the end of the lid member 10 are connected. A space is formed between the region. Therefore, as shown in FIG. 4 A, the pressure receiving area applied to the cover member before filling the second encapsulant is comprised of the area of the cut open end of the hollow fiber bundle 30, and the area of the peripheral region.

In the manufacturing method shown in FIG. 3 and FIG. 4A, the number of rotations around the central axis of the casing body varies depending on the outer diameter of the casing body and the material of the second sealant. For example, when the second sealant is a two-component curable polyurethane, 800 rpm or more and 1500 rpm or less is preferable.

[Example 1]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member , And the ultrasonic welding by the shear joint method, as shown in FIG. 3, the central axis of the casing body is kept in the horizontal direction, and the lid member is provided while rotating around the central axis of the casing body. from the outlet inlet fluid, and the second sealing agent made of two-component curable poly urethane introducing a second sealing agent along a inner surface of the lid member. Here, in the shear joint method, the inclination angle was 45 degrees, the outer diameter of the casing body was 52 mm, and the rotation speed of the casing body was 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the cover member of the obtained hollow fiber filter was reduced by 38% compared to before filling with the second sealant.

[Example 2]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member 3 is ultrasonically welded by an energy direct joint method, and as shown in FIG. 3, the central axis of the casing body is kept in the horizontal direction, and the lid member is provided while rotating around the central axis of the casing body. from deriving inlet fluid, and the second sealing agent made of two-component curable poly urethane introducing a second sealing agent along a inner surface of the lid member. Here, the energy direct joint method, the angle of the tip of the triangle of the joint portion is 60 degrees, two-component curable poly urethane is the same as that used in Example 1, implemented outside diameter of the casing main body As in Example 1, the number of rotations of the casing body was 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

[Example 3]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Are ultrasonically welded by the shear joint method and the energy direct joint method according to Example 1 and Example 2, and then the center axis of the casing body is kept in the horizontal direction as shown in FIG. while rotating around the central axis, from the outlet inlet fluid provided in the lid member, two-part second sealant the second encapsulant consisting of curable poly urethane and along the inner surface of the lid member Was introduced. Here, shear joint method, the inclination angle is 45 degrees, the energy direct joint method, the angle of the tip of the triangle of the joint portion is 60 degrees, two-component curable poly urethane, those used in Example 1 The outer diameter of the casing body is the same as that of Example 1, and the rotation speed of the casing body is 1300 rpm. The second sealing agent was 100% coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

[Example 4]
A resin casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with a first sealant so as to have a cut opening end surface of the hollow fiber bundle, and a resin lid member Are ultrasonically welded by the shear joint method and the energy direct joint method according to Example 1 and Example 2, and then the center axis of the casing body is kept in the horizontal direction as shown in FIG. while rotating around the central axis, from the outlet inlet fluid provided in the lid member, two-part second sealant the second encapsulant consisting of curable poly urethane and along the inner surface of the lid member Was introduced. Here, shear joint method, the inclination angle is 45 degrees, the energy direct joint method, the angle of the tip of the triangle of the joint portion is 60 degrees, two-component curable poly urethane, those used in Example 1 The outer diameter of the casing body is the same as that of Example 1, and the rotation speed of the casing body is 1300 rpm. 10% of the second sealing agent was coated on the inclined inner surface of the lid member. The pressure receiving area applied to the lid member of the obtained hollow fiber filter was reduced by 30% compared to before filling with the second sealant.

DESCRIPTION OF SYMBOLS 10 Lid member, 12 Fluid inlet | inlet, 14 Nozzle, 20 Casing main body, 22 Casing main body cylinder, 24 1st sealing part, 30 Hollow fiber bundle, 40 2nd sealing part, 42 Filling part, 44 Continuous film, 50 frames, 52 screws, 60 injection nozzle, 62a, 62b opening, 100 hollow fiber type filter.

Claims (9)

Hollow fiber bundles,
A casing body in which the hollow fiber bundle is fixed to at least one end opening of the casing body cylinder with the first sealant so as to have a cut opening end surface of the hollow fiber bundle;
A lid member mounted on each end of the casing body and provided with a fluid outlet;
A filling portion formed by filling a second sealant into a space formed between the outer peripheral region of the cut opening end surface of the hollow fiber bundle and the connection region between the end of the casing body and the end of the lid member; ,
A continuous film that extends from the filling portion to at least a part of the inner surface of the lid member and adheres to the inner surface of the lid member;
A hollow fiber filter characterized by comprising:   The hollow fiber filter according to claim 1, wherein the first sealant, the second sealant, and the constituent material of the continuous film are the same material or the same kind of material.   The hollow fiber filter according to claim 1 or 2, wherein the connection between the end of the casing body and the lid member is melt-bonded using an ultrasonic welding method. The end portions of the pair of lid members at both ends of the casing body in which the hollow fiber bundle is fixed to at least one end opening portion of the casing body cylinder with the first sealant so as to have the cut opening end face of the hollow fiber bundle. Connecting each of the
Introducing the second sealant along the inner surface of the lid member from the fluid outlet provided in the lid member while rotating around the central axis of the casing body;
A method for producing a hollow fiber filter, comprising:   The step of introducing the second sealant includes maintaining the center axis of the casing body in the horizontal direction and rotating the second axis from the fluid outlet provided in the lid member while rotating about the center axis of the casing body. 5. The method for producing a hollow fiber filter according to claim 4, wherein the process is a step of introducing a stopper along the inner surface of the lid member.   In the step of introducing the second sealant, the central axis of the casing body is kept in the vertical direction, the leading end surface is blocked at the fluid outlet port provided in the lid member, and the opening is formed on the outer surface of the leading end portion. The second sealing agent introduced into the injection nozzle by centrifugal force is attached to the inner surface of the lid member through the opening of the injection nozzle while the formed injection nozzle is mounted and rotated around the central axis of the casing body. It is a process of introducing along between the connection area | region of the edge part of a casing main body, and the edge part of a cover member, and the outer peripheral area | region of the cutting opening end surface of a hollow fiber bundle. A method for producing a hollow fiber filter.   Furthermore, the process of connecting the edge part of a casing main body and the edge part of a cover member melt-bonds using an ultrasonic welding method, The hollow of any one of Claims 4-6 characterized by the above-mentioned. A method for manufacturing a thread filter.   The method for producing a hollow fiber filter according to claim 7, wherein the ultrasonic welding method is selected from a shear joint method, an energy direct joint method, or a combination thereof.   Further, the step of connecting the end of the casing body and the end of the lid member is performed by screwing a male screw formed on the outer peripheral surface of the casing main body and a female screw formed on the inner peripheral surface of the lid member. The method for manufacturing a hollow fiber filter according to any one of claims 4 to 6, wherein the end of the casing body and the lid member are connected.

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