WO2008066340A1 - Method and apparatus of manufacturing membrane using tubular support - Google Patents

Method and apparatus of manufacturing membrane using tubular support Download PDF

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Publication number
WO2008066340A1
WO2008066340A1 PCT/KR2007/006102 KR2007006102W WO2008066340A1 WO 2008066340 A1 WO2008066340 A1 WO 2008066340A1 KR 2007006102 W KR2007006102 W KR 2007006102W WO 2008066340 A1 WO2008066340 A1 WO 2008066340A1
Authority
WO
WIPO (PCT)
Prior art keywords
membrane
support
tubular support
spinneret
forming
Prior art date
Application number
PCT/KR2007/006102
Other languages
French (fr)
Inventor
Ho Sung Yoon
Original Assignee
Ho Sung Yoon
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020060119191A external-priority patent/KR100844043B1/en
Priority claimed from KR1020070007545A external-priority patent/KR101367985B1/en
Application filed by Ho Sung Yoon filed Critical Ho Sung Yoon
Publication of WO2008066340A1 publication Critical patent/WO2008066340A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B01D69/087—Details relating to the spinning process
    • B01D69/0871—Fibre guidance after spinning through the manufacturing apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B01D69/087—Details relating to the spinning process
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D69/00—Semi-permeable membranes for separation processes or apparatus characterised by their form, structure or properties; Manufacturing processes specially adapted therefor
    • B01D69/08—Hollow fibre membranes
    • B01D69/085—Details relating to the spinneret
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2323/00—Details relating to membrane preparation
    • B01D2323/42—Details of membrane preparation apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2325/00—Details relating to properties of membranes
    • B01D2325/40—Fibre reinforced membranes

Definitions

  • the present invention relates to a method and apparatus for forming a membrane using a tubular support and, more particularly, to a method and apparatus for forming a membrane using a tubular support in which the tubular support for a membrane is formed using a yarn, band-shaped nonwoven fabric or band-shaped fabric woven with a yarn, and the membrane is effectively formed using the tubular support.
  • Membranes using selective transmission characteristics of polymer materials are widely used. Such membranes are classified into flat sheet membranes, tubular membranes and hollow fiber membranes according to their shapes. Since such membranes have a membrane surface area greater than that of the other membranes with the same volume and are readily modularized, they are used for various purposes such as advanced water treatment, gray water treatment, wastewater treatment, air purification, and the like.
  • the membrane is formed in such a manner that yarn is woven to form a support, and a spinning solution is applied to the support and solidified therewith.
  • the support is used to maintain the solidified spinning solution in a specific shape and increase the strength of the membrane.
  • the formation of the membrane is obtained by a seriess of continuous processes including the formation of the support using a yarn and the formation of the membrane using the support.
  • An object of the present invention is to provide a method for forming a membrane using a tubular support, in which the formation of the support required for the formation of the membrane is rapidly and efficiently carried out, thus remarkably improving the productivity of the membrane.
  • Another object of the present invention is to provide an apparatus for forming a membrane which can efficiently manufacture a membrane using a tubular support.
  • the present invention provides a method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support by arranging a plurality of yarns in a circular shape; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank.
  • the step of forming the tubular support may comprise the step of arranging the plurality of yarns in a multiply layer.
  • the method may further comprise the step of overlapping the yarns constituting the tubular support to each other.
  • the step of overlapping the yarns may comprise the step of plasma-processing the yarns.
  • the step of overlapping the yarns may comprise the step of providing an SZ twist to the yarns.
  • the step of overlapping the yarns may further comprise the step of fusing overlapped yarns with each other.
  • the method may further comprise the step of spirally winding a reinforcing material on the outer circumference of bhe tubular support along the longitudinal direction thereof,
  • the present invention provides a method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support using a band-shaped fabric; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank.
  • the fabric may be a nonwoven fabric.
  • the fabric may be formed by weaving a yarn.
  • the method may further comprise the step of adhering overlapped portions of the fabric of the tubular support to each other.
  • the step of forming the tubular support may comprise the step of spirally winding the band-shaped fabric to form the tubular support .
  • the present invention provides an apparatus for forming a membrane using a tubular support, the apparatus comprising: yarn supply means for arranging a plurality of yarns in a circular shape and supplying the same to a spinneret as a tubular support; the spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
  • a wire penetrating the central nozzle may be further provided in the central portion of the spinneret.
  • the yarn supply means may comprise a circular body having a hollow portion formed in the center thereof, and a plurality of weaving cones provided on the upper surface of the body and wound with the yarn.
  • a yarn inlet portion including a plurality of holes formed along the hollow portion may be further provided in the hollow portion of the body.
  • the yarn inlet portion may be movably mounted with respect to the yarn supply means .
  • Fusion processing means for fusing the yarn may be further provided on the top of the spinneret.
  • Reinforcing material winding means for winding a reinforcing material on the outer circumference of the tubular support transferred to the spinneret may be further provided on the top of the spinneret.
  • the present invention provides an apparatus for forming a membrane using a tubular support, the apparatus comprising: tubular support forming means for forming a tubular support using a band-shaped fabric; a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
  • the tubular support forming means may have a cylindrical shape with a hollow portion, of which the inner diameter is reduced along the longitudinal direction thereof, and comprise a rotation preventing projection formed on the inner circumference of the hollow portion along the longitudinal direction thereof.
  • the tubular support forming means may further comprise adhesive supply means for externally supplying an adhesive to the inside there ⁇ of .
  • Fusion processing means for fusing the tubular support may be further provided on the top of the spinneret.
  • FIG. 1 is a schematic diagram showing a membrane forming apparatus in accordance with a first embodiment of the present invention
  • FIG. 2 is a schematic diagram showing an example of a yarn supplier 100 of FIG. 1;
  • FIG. 3 is a schematic diagram showing a spinneret 200 of FIG. 1 in which a wire 230 is installed in the middle portion thereof;
  • FIGS. 4 to 6 are bottom views illustrating the shapes of yarns 101 arranged in the spinneret 200;
  • FIG. 7 is a cross-sectional view showing an example of a membrane manufactured in accordance with the present invention.
  • FIG. 8 is a diagram showing the main elements of a membrane forming apparatus in accordance with a second embodiment of the present invention.
  • FIG. 9 is a schematic diagram showing a membrane forming apparatus in accordance with a third embodiment of the present invention.
  • FIG. 10 is a schematic diagram showing a membrane forming apparatus in accordance with a fourth embodiment of the present invention.
  • FIG. 11 is a schematic diagram showing a membrane forming apparatus in accordance with a fifth embodiment of the present invention.
  • FIG. 12 is a diagram illustrating the structure of a tubular member 700 of FIG. 11;
  • FIGS. 13A and 13B are diagrams showing modified examples of the membrane forming apparatus of FIG. 11;
  • FIG. 14A is a schematic diagram showing a membrane forming apparatus in accordance with a sixth embodiment of the present invention.
  • FIG. 14B is a diagram illustrating the shape of a tubular support formed by the apparatus of FIG. 14A;
  • FIG. 15A is a schematic diagram showing a membrane forming apparatus in accordance with a seventh embodiment of the present invention.
  • FIG. 15B is a diagram showing the shape of a tubular support formed by the apparatus of FIG. 15A; and FIG. 15C is a schematic diagram showing a modified example of the membrane forming apparatus of FIG. 15A.
  • FIG. 1 is a schematic diagram showing a membrane forming apparatus in accordance with a first embodiment of the present invention.
  • the membrane forming apparatus of FIG. 1 includes a yarn supplier 100 arranging a plurality of yarns 101 in a circular shape and supplying the same to a spinneret 200, and the spinneret 200 disposed on the bottom of the yarn supplier 100 to spin a spinning solution A to the yarns 101 supplied from the yarn supplier 100 in a circular shape, thus forming a membrane P. Moreover, a water tank 300 for solidifying the membrane P discharged from the spinneret 200, and winding means 400 for winding the membranes P solidified in the water tank are provided on the rear end of the spinneret 200. As shown in FIG.
  • the yarn supplier 100 includes a circular body 110 having a hollow portion formed in the center thereof, and a plurality of weaving cones 120 provided on the upper surface of the body 110 and wound with the yarn 101.
  • a yarn inlet portion 130 may be formed in the hollow portion of the body 110.
  • the yarn inlet portion 130 includes a plurality of holes 131 arranged at regular intervals along the hollow portion.
  • the yarns 101 discharged from the weaving cones 120 are introduced into the holes 131 and then led to the spinneret 200.
  • the yarn inlet portion 130 arranges the yarns 101 supplied to the spinneret 200 Ln a circular shape, thus forming a tubular support formed of the yarns.
  • the yarn supplier 100 may have a configuration that does not use the weaving cones 120 wound with yarns but directly extracts yarns from a yarn material.
  • the yarns 101 may be supplied to the spinneret 200 in a multiple layer by arranging the holes 131 in a double or multiple manner, not arranging the holes in a row on the yarn inlet portion 130.
  • the number and arrangement of the holes 131 and the number of the weaving cones 120 are not limited to specific values, but may be appropriately determined in consideration of the interval or density of the yarns supplied to the spinneret 200.
  • the yarn 101 used in the present embodiment may be one selected from the group consisting of polyester or nylon monofilament, multifilament, and a mixture thereof.
  • a support inlet 201 through which the yarns arranged in a circular shape and supplied from the yarn supplier 100 are led, is provided on the upper portion of the spinneret 200.
  • the support inlet 201 extends along the central axis of the spinneret 200 and is connected to a central nozzle 202 on the bottom thereof.
  • a spinning solution inlet 210 connected to the outside of the central nozzle 202 is provided on one lateral surface of the spinneret 200.
  • a membrane discharge port 220 from which membranes are discharged is provided on the bottom of the central nozzle 202.
  • the spinning solution A comprises a polymer, an additive and a solvent.
  • the polymer may be one selected from the group consisting of polyvinylidene fluoride (PVDF) , ECTFG, polyacrylonitrile, polyacrylonitrile, polysulfone, sulfonated polysulfone, polyethersulfone, cellulose acetate, cellulose triacetate, polymethylmethacrylate, and a mixture thereof.
  • the additive may be one selected from the group consisting of water, methyl alcohol, ethyl alcohol, ethylene glycol, polyethylene glycol, polypropylene glycol, glycerin, polyvinyl pyrrolidone (PVP), and a mixture thereof.
  • the solvent may be one selected from the group consisting of N-methyl-2-pyrrolidone (NMP) , dimethylformamide (DMF) , diraethylacetamide (DMAc) , chloroform, tetrahydrofuran, and a mixture thereof.
  • NMP N-methyl-2-pyrrolidone
  • DMF dimethylformamide
  • DMAc diraethylacetamide
  • chloroform chloroform
  • tetrahydrofuran and a mixture thereof.
  • the spinneret 200 may further comprise a wire 230 having a diameter smaller than the inner diameter of the central nozzle 202 and extending from the central portion of the support inlet 201 through the central nozzle 202 to the bottom along the central axis of the spinneret 200.
  • the wire 230 is provided to stably maintain the shape of the membrane P discharged from the spinneret 200.
  • a yarn solidifying solution W is filled in the water tank 300.
  • the yarn solidifying solution may be water.
  • temperature adjusting means for adjusting the temperature of the yarn solidifying solution W may be provided inside the water tank 300.
  • the temperature adjusting means adjusts the temperature of the yarn solidifying solution W to adjust the size of pores generated in the membrane P.
  • the method of forming the pores in the membrane P may be any method commonly used in the art.
  • the winding means 400 includes a roller 410 for transferring the membrane P passing through the water tank 300 and a bobbin 420 for winding the membrane P transferred by the roller 410.
  • the yarns 101 are drawn out from the weaving cones 120 of the yarn supplier 100 and passed through the holes 131 of the yarn inlet portion 130 and the central nozzle 202 of the spinneret 200. Then, the yarns 101 are connected to the bobbin 420 through the water tank 300 and the roller 410. As shown in FIGS. 4 and 5, the yarns 101 are arranged in a tubular shape along the inner circumference of the central nozzle 202.
  • FIG. 4 is a bottom view of the spinneret 200 having no wire 230
  • FIG. 5 is a bottom view of the spinneret 200 having the wire 230.
  • FIG. 4 is a bottom view of the spinneret 200 having no wire 230
  • FIG. 5 is a bottom view of the spinneret 200 having the wire 230.
  • FIG. 4 is a bottom view of the spinneret 200 having no wire 230
  • FIG. 5 is a bottom view of the spinneret 200 having the wire 230.
  • FIG. 4 is a bottom view
  • FIG. 6 is a bottom view of the spinneret 200 in which the yarns 101 supplied to the spinneret 200 are arranged in a multiple layer.
  • the spinning solution A is supplied to the central nozzle 202 through the spinning solution inlet 210 of the spinneret 200 and, at the same time, the bobbin 420 is operated to carry out the winding operation.
  • the tubular support i.e., the yarns 101 arranged in a tubular shape
  • the spinning solution A is spun thereto to be coated on the tubular support formed of the yarns 101, thus forming the membrane P.
  • FIG. 7 is a cross-sectional view showing an example of bhe membrane P discharged from the membrane discharge port 220 of the spinneret 200.
  • the membrane P discharged from the spinneret 200 is solidified in the water tank 300 storing the yarn solidifying solution W, i.e., water, and wound on the bobbin 420 by the roller 410. While the membrane P is solidified in the yarn solidifying solution, pores having a predetermined size are formed in the membrane P.
  • the membrane P can be easily formed by a simple method in which the yarns arranged in a tubular shape are continuously supplied to the central nozzle 202 of the spinneret 200 and the spinning solution A is spun to the tubular support. Accordingly, since it is not necessary to separately weave the support for forming a membrane, differently from the conventional method, it is possible to form the membrane easily and in quantity.
  • FIG. 8 is a diagram showing the main elements of a membrane forming apparatus in accordance with a second embodiment of the present invention.
  • the yarn inlet portion 130 is moved left and right with respect to the yarn supplier 100 to provide an SZ twist to the tubular support, i.e., the yarns 101 arranged in a circular shape, supplied to the spinneret 200.
  • the yarn inlet portion 130 is movably connected to the yarn supplier 100 through a rotating member 140.
  • the rotating member 140 includes a coil 141 supplied with a current, a permanent magnet 142, and a bearing 143.
  • the coil 141 is disposed inside the hollow portion of the yarn supplier 100, and the permanent magnet 142 is disposed at the outer circumference of the yarn inlet portion 130 at a predetermined interval.
  • the current is supplied to the coil 141 in a direction or in a reverse direction by a controller, not depicted.
  • the yarn inlet portion 130 is rotated in one or the other direction by a magnetic attractive or repulsive force between the magnetic flux applied to the coil 141 and the permanent magnet 142.
  • the controller controls the membrane formation process so that the bobbin 420 is driven and, at the same time, the yarn inlet portion 130 is moved left and right while carrying out the spinning solution A spinning process, thus providing an SZ twist to the tubular support supplied to the spinneret 200.
  • the spinning solution A is spun to the yarns 101 overlapping each other and solidified. Accordingly, the yarns 101 are woven to a predetermined shape, thus greatly increasing the strength of the membrane P.
  • FIG. 9 is a schematic diagram showing a membrane forming apparatus in accordance with a third embodiment of the present invention.
  • a fusion processor 500 is installed on the bottom of the yarn supplier 100 with respect to the configuration of FIG. 8.
  • the fusion processor 500 may be a thermal or ultrasonic fusion processor.
  • the fusion processor 500 applies heat or ultrasonic waves to the yarns 101 having the SZ twist discharged from the yarn supplier 100, thus stably maintaining the overlapped state of the yarns 101.
  • FIG. 10 is a schematic diagram showing a membrane forming apparatus in accordance with a fourth embodiment of the present invention.
  • a plasma processor 600 is installed on the bottom of the yarn supplier 100 with respect to the configuration of FIG. 1 or 8.
  • FIG. 11 is a schematic diagram showing a membrane forming apparatus in accordance with a fifth embodiment of the present invention.
  • a tubular member 700 for rolling a band-shaped fabric S in a tubular shape is provided on the top of the spinneret 200.
  • the fabric S may be woven with the above-described yarns and, preferably, a nonwoven fabric may be used.
  • FIG. 12 is a diagram illustrating the structure of the tubular member 700.
  • the tubular member 700 has a cylindrical shape with a hollow portion. The diameter of the hollow portion of the tubular member 700 is reduced gradually along the longitudinal direction that the fabric S is supplied.
  • the tubular member 700 has a rotation preventing projection 701 formed on the inner circumference along the longitudinal direction thereof. One end of the rotation preventing projection 701 is formed to have a step height with respect to the inner circumference of the tubular member 700 so that the fabric S may be rotated in one direction.
  • the fabric S is roLled in a tubular shape having a diameter corresponding to that of an outlet of the tubular member 700
  • the tubular support discharged from the tubular member 700 i.e., the fabric rolled in a tubular shape
  • the spinneret 200 in the same manner as the above-described embodiments, and the spinning solution A is spun thereto and solidified, thus forming the membrane:.
  • FIGS. 13A and 13B are diagrams showing examples of the configuration for adhering the overlapped portions of the tubular fabric to e:ach other.
  • an adhesive supplier 710 for supplying an adhesive to the inside of the tubular member 700 is installed on the lateral surface thereof.
  • the adhesive supplier 710 may include discharge means for discharging a predetermined amount of the adhesive to the tubular member 700 continuously.
  • the adhesive is injected to an appropriate position of the fabric S, i.e., a position where the corresponding fabric overlaps the other fabric when being rolled in a tubular shape. In this state, the fabric S is rolled in a tubular shape while being transferred through the tubular member 700.
  • a fusion processor 500 is installed on the bottom of the tubular member 700.
  • the fusion processor 500 may be a thermal or ultrasonic fusion processor.
  • the method of adhering the overlapped portions of the fabric in the present configuration may be any method commonly used in the art, not limited to a specific method.
  • the embodiment described with respect to FIGS. 11 to 13 has a characteristic feature in that the fabric formed in a tubular shape is used as the support for forming a membrane. Accordingly, the present invention is not limited to a specific configuration for forming the fabric in a tubular shape.
  • the tubular member 700 may, of course, be eliminated.
  • FIG. 14A is a schematic diagram showing a membrane forming apparatus in accordance with a sixth embodiment of the present invention.
  • a wire 230 passing through the central nozzle 202 is installed in the central portion of the spinneret 200, the same as the embodiment of FIG. 3.
  • a fabric supplier 800 for supplying a band-shaped fabric is provided on the outside of the wire 230 protruding above the top of the spinneret 200.
  • the fabric supplier 800 rotates the outside of the wire 230 to wind the band-shaped fabric on the wire 230. That is, the fabric supplier 800 winds the band-shaped fabric on the wire 230, thus forming a tubular support for forming a membrane.
  • the rotation speed of the fabric supplier 800 is appropriately determined according to the transfer speed of the tubular support passing through the spinneret 200, more accurately, according to the rotation speed of the bobbin 420 shown in FIG. 1.
  • the band-shaped fabric S is wound on the wire 230 while partially overlapping each other.
  • the winding force of the band-shaped fabric S with respect to the wire 230 may be set to zero or a value close to zero by appropriately setting the rotation speed of the fabric supplier 800 with respect to the wire 230 and the rotation speed of the bobbin 420.
  • a fusion processor using heat, ultrasonic or plasma on the bottom of the fabric supplier 800 to adhere the overlapped portions of the band-shaped fabric S and supply the same to the spinneret 200.
  • FIG. 15A is a schematic diagram showing a membrane forming apparatus in accordance with a seventh embodiment of the present invention.
  • a reinforcing material supplier 900 for winding a reinforcing material K in a direction perpendicular to the transfer direction of the yarns 101 is provided in the configuration of FIG. 1.
  • a wire 230 may be installed in the central portion of the spinneret 200, if necessary.
  • the reinforcing material supplier 900 rotates the outside of the yarns 101 supplied to the spinneret 200 to wind the reinforcing material K on the yarns 101 in the same manner as the fabric supplier 800 of FIG. 14A.
  • a yarn or band-shaped fabric may be used as the reinforcing material K.
  • the reinforcing material K is wound on the outer circumference of the tubular support composed of the yarns 101 by driving the reinforcing material supplier 900 while transferring the yarns 101 arranged in a circular shape. Accordingly, in this case, the reinforcing material K is spirally wound on the outer circumference of the tubular support.
  • FIG. 15B is a diagram showing an example in which reinforcing material K composed of a band-shaped fabric is wound on the yarns 101.
  • the wound shape of the reinforcing material K is varied according to the transfer speed of the yarns 101 or the rotation speed of the reinforcing material supplier 900.
  • the rotation speed of the reinforcing material supplier 900 with respect to the yarns 101 may be set appropriately according to the required strength of the membrane.
  • the reinforcing material K is wound on the outside of the yarns 101 arranged in a circular shape, the strength of the membrane formed of the tubular support in accordance with this embodiment is more increased.
  • FIG. 15C is a schematic diagram showing a modified example of the present embodiment, in which a fusion processor 500 using heat, ultrasonic or plasma is provided on the bottom of the reinforcing material supplier
  • the spinneret 200 is not limited to a specific shape, but any other shape capable of forming a membrane may be used.
  • the yarn and fabric used in the present invention are not limited to specific materials, but any other material capable of providing a strength above a predetermined level to the membrane may be used.

Abstract

The present invention provides a method and apparatus for forming a membrane using a tubular support in which the tubular support for a membrane is formed using a yarn, band- shaped nonwoven fabric or band-shaped fabric woven with a yarn, and the membrane is effectively formed using the tubular support. In the present invention, a plurality of yarns 101 is arranged in a circular shape, or a band-shaped fabric is rolled in a tubular shape, thus forming the tubular support. Here, means for overlapping the yarns 101 or adhering the overlapped yarns or fabrics may be provided, if necessary. The tubular support is supplied to a spinneret 200, and a spinning solution is spun to the tubular support, thus forming a membrane.

Description

[DESCRIPTION]
[invention Title]
METHOD AND APPARATUS OF MANUFACTURING MEMBRANE USING TUBULAR
SUPPORT
[Technical Field]
The present invention relates to a method and apparatus for forming a membrane using a tubular support and, more particularly, to a method and apparatus for forming a membrane using a tubular support in which the tubular support for a membrane is formed using a yarn, band-shaped nonwoven fabric or band-shaped fabric woven with a yarn, and the membrane is effectively formed using the tubular support.
[Background Art]
Membranes using selective transmission characteristics of polymer materials are widely used. Such membranes are classified into flat sheet membranes, tubular membranes and hollow fiber membranes according to their shapes. Since such membranes have a membrane surface area greater than that of the other membranes with the same volume and are readily modularized, they are used for various purposes such as advanced water treatment, gray water treatment, wastewater treatment, air purification, and the like. In general, the membrane is formed in such a manner that yarn is woven to form a support, and a spinning solution is applied to the support and solidified therewith. Here, the support is used to maintain the solidified spinning solution in a specific shape and increase the strength of the membrane. The formation of the membrane is obtained by a seriess of continuous processes including the formation of the support using a yarn and the formation of the membrane using the support.
However, weaving the support using yarn requires a lot of time, and thus the formation of the membrane requires a lot of time, thus reducing the productivity of the membrane.
[Disclosure] [Technical Problem] Accordingly, the present invention has been made in an effort to solve the above-described drawbacks. An object of the present invention is to provide a method for forming a membrane using a tubular support, in which the formation of the support required for the formation of the membrane is rapidly and efficiently carried out, thus remarkably improving the productivity of the membrane.
Moreover, another object of the present invention is to provide an apparatus for forming a membrane which can efficiently manufacture a membrane using a tubular support. [Technical Solution]
In a first aspect, the present invention provides a method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support by arranging a plurality of yarns in a circular shape; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank.
The step of forming the tubular support may comprise the step of arranging the plurality of yarns in a multiply layer.
The method may further comprise the step of overlapping the yarns constituting the tubular support to each other.
The step of overlapping the yarns may comprise the step of plasma-processing the yarns. The step of overlapping the yarns may comprise the step of providing an SZ twist to the yarns.
The step of overlapping the yarns may further comprise the step of fusing overlapped yarns with each other. The method may further comprise the step of spirally winding a reinforcing material on the outer circumference of bhe tubular support along the longitudinal direction thereof,
In a second aspect, the present invention provides a method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support using a band-shaped fabric; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank. The fabric may be a nonwoven fabric. The fabric may be formed by weaving a yarn. The method may further comprise the step of adhering overlapped portions of the fabric of the tubular support to each other.
The step of forming the tubular support may comprise the step of spirally winding the band-shaped fabric to form the tubular support .
In a third aspect, the present invention provides an apparatus for forming a membrane using a tubular support, the apparatus comprising: yarn supply means for arranging a plurality of yarns in a circular shape and supplying the same to a spinneret as a tubular support; the spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
A wire penetrating the central nozzle may be further provided in the central portion of the spinneret.
The yarn supply means may comprise a circular body having a hollow portion formed in the center thereof, and a plurality of weaving cones provided on the upper surface of the body and wound with the yarn. A yarn inlet portion including a plurality of holes formed along the hollow portion may be further provided in the hollow portion of the body.
The yarn inlet portion may be movably mounted with respect to the yarn supply means . Fusion processing means for fusing the yarn may be further provided on the top of the spinneret.
Reinforcing material winding means for winding a reinforcing material on the outer circumference of the tubular support transferred to the spinneret may be further provided on the top of the spinneret.
In a fourth aspect, the present invention provides an apparatus for forming a membrane using a tubular support, the apparatus comprising: tubular support forming means for forming a tubular support using a band-shaped fabric; a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
The tubular support forming means may have a cylindrical shape with a hollow portion, of which the inner diameter is reduced along the longitudinal direction thereof, and comprise a rotation preventing projection formed on the inner circumference of the hollow portion along the longitudinal direction thereof.
The tubular support forming means may further comprise adhesive supply means for externally supplying an adhesive to the inside there≥of .
Fusion processing means for fusing the tubular support may be further provided on the top of the spinneret.
[Description of Drawings]
FIG. 1 is a schematic diagram showing a membrane forming apparatus in accordance with a first embodiment of the present invention;
FIG. 2 is a schematic diagram showing an example of a yarn supplier 100 of FIG. 1;
FIG. 3 is a schematic diagram showing a spinneret 200 of FIG. 1 in which a wire 230 is installed in the middle portion thereof;
FIGS. 4 to 6 are bottom views illustrating the shapes of yarns 101 arranged in the spinneret 200;
FIG. 7 is a cross-sectional view showing an example of a membrane manufactured in accordance with the present invention;
FIG. 8 is a diagram showing the main elements of a membrane forming apparatus in accordance with a second embodiment of the present invention;
FIG. 9 is a schematic diagram showing a membrane forming apparatus in accordance with a third embodiment of the present invention; FIG. 10 is a schematic diagram showing a membrane forming apparatus in accordance with a fourth embodiment of the present invention;
FIG. 11 is a schematic diagram showing a membrane forming apparatus in accordance with a fifth embodiment of the present invention;
FIG. 12 is a diagram illustrating the structure of a tubular member 700 of FIG. 11;
FIGS. 13A and 13B are diagrams showing modified examples of the membrane forming apparatus of FIG. 11; FIG. 14A is a schematic diagram showing a membrane forming apparatus in accordance with a sixth embodiment of the present invention;
FIG. 14B is a diagram illustrating the shape of a tubular support formed by the apparatus of FIG. 14A; FIG. 15A is a schematic diagram showing a membrane forming apparatus in accordance with a seventh embodiment of the present invention;
FIG. 15B is a diagram showing the shape of a tubular support formed by the apparatus of FIG. 15A; and FIG. 15C is a schematic diagram showing a modified example of the membrane forming apparatus of FIG. 15A.
[Mode for Invention]
Hereinafter, preferred embodiments in accordance with the present invention will be described with reference to the accompanying drawings. The preferred embodiments are provided so that those skilled in the art can sufficiently understand the present invention, but can be modified in various forms and the scope of the present invention is not limited to the preferred embodiments.
FIG. 1 is a schematic diagram showing a membrane forming apparatus in accordance with a first embodiment of the present invention.
The membrane forming apparatus of FIG. 1 includes a yarn supplier 100 arranging a plurality of yarns 101 in a circular shape and supplying the same to a spinneret 200, and the spinneret 200 disposed on the bottom of the yarn supplier 100 to spin a spinning solution A to the yarns 101 supplied from the yarn supplier 100 in a circular shape, thus forming a membrane P. Moreover, a water tank 300 for solidifying the membrane P discharged from the spinneret 200, and winding means 400 for winding the membranes P solidified in the water tank are provided on the rear end of the spinneret 200. As shown in FIG. 2, the yarn supplier 100 includes a circular body 110 having a hollow portion formed in the center thereof, and a plurality of weaving cones 120 provided on the upper surface of the body 110 and wound with the yarn 101. Moreover, a yarn inlet portion 130 may be formed in the hollow portion of the body 110. The yarn inlet portion 130 includes a plurality of holes 131 arranged at regular intervals along the hollow portion. The yarns 101 discharged from the weaving cones 120 are introduced into the holes 131 and then led to the spinneret 200. The yarn inlet portion 130 arranges the yarns 101 supplied to the spinneret 200 Ln a circular shape, thus forming a tubular support formed of the yarns.
Moreover, the yarn supplier 100 may have a configuration that does not use the weaving cones 120 wound with yarns but directly extracts yarns from a yarn material.
Furthermore, the yarns 101 may be supplied to the spinneret 200 in a multiple layer by arranging the holes 131 in a double or multiple manner, not arranging the holes in a row on the yarn inlet portion 130. The number and arrangement of the holes 131 and the number of the weaving cones 120 are not limited to specific values, but may be appropriately determined in consideration of the interval or density of the yarns supplied to the spinneret 200.
The yarn 101 used in the present embodiment may be one selected from the group consisting of polyester or nylon monofilament, multifilament, and a mixture thereof.
A support inlet 201, through which the yarns arranged in a circular shape and supplied from the yarn supplier 100 are led, is provided on the upper portion of the spinneret 200. The support inlet 201 extends along the central axis of the spinneret 200 and is connected to a central nozzle 202 on the bottom thereof. Moreover, a spinning solution inlet 210 connected to the outside of the central nozzle 202 is provided on one lateral surface of the spinneret 200. Furthermore, a membrane discharge port 220 from which membranes are discharged is provided on the bottom of the central nozzle 202.
Here, the spinning solution A comprises a polymer, an additive and a solvent. The polymer may be one selected from the group consisting of polyvinylidene fluoride (PVDF) , ECTFG, polyacrylonitrile, polyacrylonitrile, polysulfone, sulfonated polysulfone, polyethersulfone, cellulose acetate, cellulose triacetate, polymethylmethacrylate, and a mixture thereof. The additive may be one selected from the group consisting of water, methyl alcohol, ethyl alcohol, ethylene glycol, polyethylene glycol, polypropylene glycol, glycerin, polyvinyl pyrrolidone (PVP), and a mixture thereof. The solvent may be one selected from the group consisting of N-methyl-2-pyrrolidone (NMP) , dimethylformamide (DMF) , diraethylacetamide (DMAc) , chloroform, tetrahydrofuran, and a mixture thereof.
As shown in FIG. 3, the spinneret 200 may further comprise a wire 230 having a diameter smaller than the inner diameter of the central nozzle 202 and extending from the central portion of the support inlet 201 through the central nozzle 202 to the bottom along the central axis of the spinneret 200. The wire 230 is provided to stably maintain the shape of the membrane P discharged from the spinneret 200.
A yarn solidifying solution W is filled in the water tank 300. The yarn solidifying solution may be water. Moreover, although not depicted in the figure, temperature adjusting means for adjusting the temperature of the yarn solidifying solution W may be provided inside the water tank 300. The temperature adjusting means adjusts the temperature of the yarn solidifying solution W to adjust the size of pores generated in the membrane P. The method of forming the pores in the membrane P may be any method commonly used in the art.
The winding means 400 includes a roller 410 for transferring the membrane P passing through the water tank 300 and a bobbin 420 for winding the membrane P transferred by the roller 410. Next, the method of forming a membrane using the above-described membrane forming apparatus will be described.
First, the yarns 101 are drawn out from the weaving cones 120 of the yarn supplier 100 and passed through the holes 131 of the yarn inlet portion 130 and the central nozzle 202 of the spinneret 200. Then, the yarns 101 are connected to the bobbin 420 through the water tank 300 and the roller 410. As shown in FIGS. 4 and 5, the yarns 101 are arranged in a tubular shape along the inner circumference of the central nozzle 202. FIG. 4 is a bottom view of the spinneret 200 having no wire 230, and FIG. 5 is a bottom view of the spinneret 200 having the wire 230. Moreover, FIG. 6 is a bottom view of the spinneret 200 in which the yarns 101 supplied to the spinneret 200 are arranged in a multiple layer. In the above state, the spinning solution A is supplied to the central nozzle 202 through the spinning solution inlet 210 of the spinneret 200 and, at the same time, the bobbin 420 is operated to carry out the winding operation. With the operation of the bobbin 420, the tubular support, i.e., the yarns 101 arranged in a tubular shape, is continuously discharged through the central nozzle 202 of the spinneret 200, and the spinning solution A is spun thereto to be coated on the tubular support formed of the yarns 101, thus forming the membrane P. FIG. 7 is a cross-sectional view showing an example of bhe membrane P discharged from the membrane discharge port 220 of the spinneret 200.
Then, the membrane P discharged from the spinneret 200 is solidified in the water tank 300 storing the yarn solidifying solution W, i.e., water, and wound on the bobbin 420 by the roller 410. While the membrane P is solidified in the yarn solidifying solution, pores having a predetermined size are formed in the membrane P. According to the above embodiment, the membrane P can be easily formed by a simple method in which the yarns arranged in a tubular shape are continuously supplied to the central nozzle 202 of the spinneret 200 and the spinning solution A is spun to the tubular support. Accordingly, since it is not necessary to separately weave the support for forming a membrane, differently from the conventional method, it is possible to form the membrane easily and in quantity.
Meanwhile, the above embodiment has described the case where the tubular support is formed by simply arranging the yarns 101 in a circular shape. However, it is possible to effectively use a method of increasing the strength of the tubular support by arranging the yarns 101 to overlap each other, besides the above-described method. FIG. 8 is a diagram showing the main elements of a membrane forming apparatus in accordance with a second embodiment of the present invention.
In this embodiment, the yarn inlet portion 130 is moved left and right with respect to the yarn supplier 100 to provide an SZ twist to the tubular support, i.e., the yarns 101 arranged in a circular shape, supplied to the spinneret 200.
In FIG. 8, the yarn inlet portion 130 is movably connected to the yarn supplier 100 through a rotating member 140. The rotating member 140 includes a coil 141 supplied with a current, a permanent magnet 142, and a bearing 143. The coil 141 is disposed inside the hollow portion of the yarn supplier 100, and the permanent magnet 142 is disposed at the outer circumference of the yarn inlet portion 130 at a predetermined interval. The current is supplied to the coil 141 in a direction or in a reverse direction by a controller, not depicted. When the coil 141 is supplied with the current, the yarn inlet portion 130 is rotated in one or the other direction by a magnetic attractive or repulsive force between the magnetic flux applied to the coil 141 and the permanent magnet 142.
The controller controls the membrane formation process so that the bobbin 420 is driven and, at the same time, the yarn inlet portion 130 is moved left and right while carrying out the spinning solution A spinning process, thus providing an SZ twist to the tubular support supplied to the spinneret 200. Like this, the spinning solution A is spun to the yarns 101 overlapping each other and solidified. Accordingly, the yarns 101 are woven to a predetermined shape, thus greatly increasing the strength of the membrane P.
FIG. 9 is a schematic diagram showing a membrane forming apparatus in accordance with a third embodiment of the present invention. In this embodiment, a fusion processor 500 is installed on the bottom of the yarn supplier 100 with respect to the configuration of FIG. 8. The fusion processor 500 may be a thermal or ultrasonic fusion processor. The fusion processor 500 applies heat or ultrasonic waves to the yarns 101 having the SZ twist discharged from the yarn supplier 100, thus stably maintaining the overlapped state of the yarns 101.
FIG. 10 is a schematic diagram showing a membrane forming apparatus in accordance with a fourth embodiment of the present invention.
In this embodiment, a plasma processor 600 is installed on the bottom of the yarn supplier 100 with respect to the configuration of FIG. 1 or 8.
When plasma is applied to the polyester or nylon yarns 101, static electricity is generated on the yarns 101 to create a spaghetti-shaped twist on the yarns 101. When the twist is formed on the yarns 101 arranged in a density over a predetermined level, the yarns 101 overlap each other, thus increasing the strength of the membrane P. Moreover, it is preferable to install the thermal or ultrasonic fusion processor on the bottom of the plasma processor 600 so as to maintain the overlapped state of the yarns 101.
Meanwhile, the above embodiments have described the case where the yarns 101 are used to form the tubular support; however, a method of using a band-shaped fabric instead of the yarns may be effectively employed.
FIG. 11 is a schematic diagram showing a membrane forming apparatus in accordance with a fifth embodiment of the present invention.
In this embodiment, a tubular member 700 for rolling a band-shaped fabric S in a tubular shape is provided on the top of the spinneret 200. Here, the fabric S may be woven with the above-described yarns and, preferably, a nonwoven fabric may be used.
FIG. 12 is a diagram illustrating the structure of the tubular member 700. The tubular member 700 has a cylindrical shape with a hollow portion. The diameter of the hollow portion of the tubular member 700 is reduced gradually along the longitudinal direction that the fabric S is supplied. Moreover, the tubular member 700 has a rotation preventing projection 701 formed on the inner circumference along the longitudinal direction thereof. One end of the rotation preventing projection 701 is formed to have a step height with respect to the inner circumference of the tubular member 700 so that the fabric S may be rotated in one direction.
When the band-shaped fabric S is led into the tubular member 700 and transferred along the longitudinal direction thereof, one end of the corresponding fabric S is hung on the rotation preventing projection 701 and the fabric S is transferred along the inner circumference of the tubular member 700 in the longitudinal direction thereof. Since the diameter of the inner circumference of the tubular member 700 is reduced gradually along the longitudinal direction thereof, the other end of the fabric S is rotated along the inner circumference of the tubular member 700. Accordingly, the fabric S is roLled in a tubular shape having a diameter corresponding to that of an outlet of the tubular member 700 The tubular support discharged from the tubular member 700, i.e., the fabric rolled in a tubular shape, is led into the spinneret 200 in the same manner as the above-described embodiments, and the spinning solution A is spun thereto and solidified, thus forming the membrane:. Meanwhile, in the above embodiment, it is possible to effectively use a method of adhering the overlapped portions of the tubular fabric rolled in a tubular shape in order to stably maintain the tubular shape of the fabric formed by bhe tubular member 700. FIGS. 13A and 13B are diagrams showing examples of the configuration for adhering the overlapped portions of the tubular fabric to e:ach other.
In FIG. 13A, an adhesive supplier 710 for supplying an adhesive to the inside of the tubular member 700 is installed on the lateral surface thereof. Although not depicted in the figure, the adhesive supplier 710 may include discharge means for discharging a predetermined amount of the adhesive to the tubular member 700 continuously. In this configuration, when the band-shaped fabric S is transferred along the inner circumference of the tubular member 700, the adhesive is injected to an appropriate position of the fabric S, i.e., a position where the corresponding fabric overlaps the other fabric when being rolled in a tubular shape. In this state, the fabric S is rolled in a tubular shape while being transferred through the tubular member 700.
In FIG. 13B, a fusion processor 500 is installed on the bottom of the tubular member 700. As described above, the fusion processor 500 may be a thermal or ultrasonic fusion processor.
The method of adhering the overlapped portions of the fabric in the present configuration may be any method commonly used in the art, not limited to a specific method. Moreover, the embodiment described with respect to FIGS. 11 to 13 has a characteristic feature in that the fabric formed in a tubular shape is used as the support for forming a membrane. Accordingly, the present invention is not limited to a specific configuration for forming the fabric in a tubular shape. Moreover, in the case where a woven support formed in advance in a tubular shape is used, the tubular member 700 may, of course, be eliminated.
FIG. 14A is a schematic diagram showing a membrane forming apparatus in accordance with a sixth embodiment of the present invention.
In this embodiment, a wire 230 passing through the central nozzle 202 is installed in the central portion of the spinneret 200, the same as the embodiment of FIG. 3. Moreover, a fabric supplier 800 for supplying a band-shaped fabric is provided on the outside of the wire 230 protruding above the top of the spinneret 200.
Although not depicted in the figure, the fabric supplier 800 rotates the outside of the wire 230 to wind the band-shaped fabric on the wire 230. That is, the fabric supplier 800 winds the band-shaped fabric on the wire 230, thus forming a tubular support for forming a membrane. Here, the rotation speed of the fabric supplier 800 is appropriately determined according to the transfer speed of the tubular support passing through the spinneret 200, more accurately, according to the rotation speed of the bobbin 420 shown in FIG. 1.
When the rotation speed of the fabric supplier 800 with respect to the wire 230 and the rotation speed of the bobbin 420 are appropriately determined, as shown in FIG. 14B, the band-shaped fabric S is wound on the wire 230 while partially overlapping each other. In this case, the winding force of the band-shaped fabric S with respect to the wire 230 may be set to zero or a value close to zero by appropriately setting the rotation speed of the fabric supplier 800 with respect to the wire 230 and the rotation speed of the bobbin 420.
Moreover, in this case, it is preferred to install a fusion processor using heat, ultrasonic or plasma on the bottom of the fabric supplier 800 to adhere the overlapped portions of the band-shaped fabric S and supply the same to the spinneret 200.
FIG. 15A is a schematic diagram showing a membrane forming apparatus in accordance with a seventh embodiment of the present invention. In this embodiment, a reinforcing material supplier 900 for winding a reinforcing material K in a direction perpendicular to the transfer direction of the yarns 101 is provided in the configuration of FIG. 1. In this case, a wire 230 may be installed in the central portion of the spinneret 200, if necessary.
The reinforcing material supplier 900 rotates the outside of the yarns 101 supplied to the spinneret 200 to wind the reinforcing material K on the yarns 101 in the same manner as the fabric supplier 800 of FIG. 14A. Here, a yarn or band-shaped fabric may be used as the reinforcing material K.
In this embodiment, the reinforcing material K is wound on the outer circumference of the tubular support composed of the yarns 101 by driving the reinforcing material supplier 900 while transferring the yarns 101 arranged in a circular shape. Accordingly, in this case, the reinforcing material K is spirally wound on the outer circumference of the tubular support.
FIG. 15B is a diagram showing an example in which reinforcing material K composed of a band-shaped fabric is wound on the yarns 101. Here, the wound shape of the reinforcing material K is varied according to the transfer speed of the yarns 101 or the rotation speed of the reinforcing material supplier 900. The rotation speed of the reinforcing material supplier 900 with respect to the yarns 101 may be set appropriately according to the required strength of the membrane.
In this embodiment, since the reinforcing material K is wound on the outside of the yarns 101 arranged in a circular shape, the strength of the membrane formed of the tubular support in accordance with this embodiment is more increased.
Lastly, FIG. 15C is a schematic diagram showing a modified example of the present embodiment, in which a fusion processor 500 using heat, ultrasonic or plasma is provided on the bottom of the reinforcing material supplier
900 to adhere the yarns 101 to each other or adhere the reinforcing materials K to each other, thus stabilizing the shape of the tubular support. Since the other elements are the same as the above-described embodiment, their detailed description will be omitted.
As above, the invention has been described in detail with reference to preferred embodiments thereof. However, it will be appreciated by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents .
For example, in the above embodiments, it is possible to form a membrane by applying a core solution to the central portion of the tubular support in the spinneret 200.
Moreover, the spinneret 200 is not limited to a specific shape, but any other shape capable of forming a membrane may be used. Furthermore, the yarn and fabric used in the present invention are not limited to specific materials, but any other material capable of providing a strength above a predetermined level to the membrane may be used.
[industrial Applicability]
As described above, according to the present invention, it is possible to efficiently form the tubular support using a yarn, band-shaped nonwoven fabric or band-shaped fabric woven with a yarn, thus improving the productivity of the membrane .

Claims

[CLAIMS]
[Claim l]
A method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support by arranging a plurality of yarns in a circular shape; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank.
[Claim 2]
The method of claim 1, wherein the step of forming the tubular support comprises the step of arranging the plurality of yarns in a multiply layer. [Claim 3]
The method of claim 1, further comprising the step of overlapping the yarns constituting the tubular support to each other.
[Claim 4]
The method of claim 3, wherein the step of overlapping the yarns comprises the step of plasma-processing the yarns.
[Claim 5]
The method of claim 3, wherein the step of overlapping the yarns comprises the step of providing an SZ twist to the yarns .
[Claim 6]
The method of claim 3, wherein the step of overlapping the yarns further comprises the step of fusing overlapped yarns with each other.
[Claim 7]
The method of claim 1, further comprising the step of spirally winding a reinforcing material on the outer circumference of the tubular support along the longitudinal direction thereof. [Claim 8]
A method for forming a membrane using an apparatus for forming a membrane, in which the apparatus comprises: a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected bo the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank, the method comprising the steps of: forming a tubular support using a band-shaped fabric; forming a membrane by transferring the tubular support through the central nozzle and spinning a spinning solution to the tubular support; and solidifying the membrane in the tank.
[Claim 9] The method of claim 8, wherein the fabric is a nonwoven fabric.
[Claim 10]
The method of claim 8, wherein the fabric is formed by weaving a yarn. [Claim 11]
The method of claim 8, further comprising the step of adhering overlapped portions of the fabric of the tubular support to each other.
[Claim 12]
The method of claim 8, wherein the step of forming the tubular support comprises the step of spirally winding the band-shaped fabric to form the tubular support.
[Claim 13]
An apparatus for forming a membrane using a tubular support, the apparatus comprising: yarn supply means for arranging a plurality of yarns in a circular shape and supplying the same to a spinneret as a tubular support; the spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle, and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
[Claim 14] The apparatus of claim 13, wherein a wire penetrating the central nozzle is further provided in the central portion of the spinneret.
[Claim 15] The apparatus of claim 13, wherein the yarn supply means comprises a circular body having a hollow portion formed in the center thereof, and a plurality of weaving cones provided on the upper surface of the body and wound with the yarn.
[Claim lβ]
The apparatus of claim 15, wherein a yarn inlet portion including a plurality of holes formed along the hollow portion is further provided in the hollow portion of the body.
[Claim 17]
The apparatus of claim 16, wherein the yarn inlet portion is movably mounted with respe≥ct to the yarn supply means. [Claim 18]
The apparatus of claim 13, wherein fusion processing means for fusing the yarn is further provided on the top of the spinneret.
[Claim 19]
The apparatus of claim 13, wherein reinforcing material winding means for winding a reinforcing material on the outer circumference of the tubular support transferred to the spinneret is further provided on the top of the spinneret.
[Claim 20] An apparatus for forming a membrane using a tubular support, the apparatus comprising: tubular support forming means for forming a tubular support using a band-shaped fabric; a spinneret including a support inlet for introducing a support, a central nozzle connected to the support inlet to discharge the support, a spinning solution inlet connected to the outside of the central nozzle and a membrane discharge port provided on the bottom of the central nozzle; a water tank for solidifying the membrane discharged from the spinneret; and winding means for winding the membrane solidified in the water tank.
[Claim 21]
The apparatus of claim 20, wherein the tubular support forming means has a cylindrical shape with a hollow portion, of which the inner diameter is reduced along the Longitudinal direction thereof, and comprises a rotation preventing projection formed on the inner circumference of bhe hollow portion along the longitudinal direction thereof.
[Claim 22]
The apparatus of claim 21, wherein the tubular support forming means further comprises adhesive supply means for externally supplying an adhesive to the inside thereof.
[Claim 23]
The apparatus of claim 20, wherein fusion processing means for fusing the tubular support is further provided on the top of the spinneret.
PCT/KR2007/006102 2006-11-29 2007-11-29 Method and apparatus of manufacturing membrane using tubular support WO2008066340A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2006-0119191 2006-11-29
KR1020060119191A KR100844043B1 (en) 2006-11-29 2006-11-29 Method for manufacturing of hollow fiber membrane module
KR1020070007545A KR101367985B1 (en) 2007-01-24 2007-01-24 Method for manufacturing of membrane module using hollow-fiber supporting material and device for manufacturing of tubular supporting material
KR10-2007-0007545 2007-01-24

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Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010108285A1 (en) * 2009-03-26 2010-09-30 Asteia Technology Inc. Non-braided reinforced hollow fibre membrane
WO2012036935A1 (en) * 2010-09-15 2012-03-22 Bl Technologies, Inc. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
EP2448658A1 (en) * 2009-06-26 2012-05-09 BL Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
WO2012082441A2 (en) * 2010-12-15 2012-06-21 General Electric Company Supported hollow fiber membrane
JP2012152705A (en) * 2011-01-27 2012-08-16 Nok Corp Method for manufacturing fiber reinforced porous hollow fiber membrane
CN103097593A (en) * 2010-07-13 2013-05-08 三菱丽阳株式会社 Process for producing fibers and apparatus for producing fibers
WO2013142000A1 (en) * 2012-03-22 2013-09-26 General Electric Company Device and process for producing a reinforced hollow fibre membrane
US8752713B2 (en) * 2008-05-21 2014-06-17 Mitsubishi Rayon Co., Ltd. Hollow porous membrane and process for producing the same
US9022229B2 (en) 2012-03-09 2015-05-05 General Electric Company Composite membrane with compatible support filaments
US9227362B2 (en) 2012-08-23 2016-01-05 General Electric Company Braid welding
US9321014B2 (en) 2011-12-16 2016-04-26 Bl Technologies, Inc. Hollow fiber membrane with compatible reinforcements
US20160184777A1 (en) * 2011-12-22 2016-06-30 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5472607A (en) * 1993-12-20 1995-12-05 Zenon Environmental Inc. Hollow fiber semipermeable membrane of tubular braid
US5598874A (en) * 1995-08-11 1997-02-04 Mg Generon, Inc. Loom processing of hollow fiber membranes
KR20030062198A (en) * 2002-01-15 2003-07-23 주식회사 파라 Hollow fiber membrane having supporting material for reinforcement, preparation thereof and spinneret for preparing the same
KR20040008935A (en) * 2002-07-19 2004-01-31 주식회사 파라 Outside-in hollow fiber membrane having supporting body including mono-filament yarn for gas separation and water treatment, preparation thereof and apparatus for preparing the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5472607A (en) * 1993-12-20 1995-12-05 Zenon Environmental Inc. Hollow fiber semipermeable membrane of tubular braid
US5598874A (en) * 1995-08-11 1997-02-04 Mg Generon, Inc. Loom processing of hollow fiber membranes
KR20030062198A (en) * 2002-01-15 2003-07-23 주식회사 파라 Hollow fiber membrane having supporting material for reinforcement, preparation thereof and spinneret for preparing the same
KR20040008935A (en) * 2002-07-19 2004-01-31 주식회사 파라 Outside-in hollow fiber membrane having supporting body including mono-filament yarn for gas separation and water treatment, preparation thereof and apparatus for preparing the same

Cited By (38)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8752713B2 (en) * 2008-05-21 2014-06-17 Mitsubishi Rayon Co., Ltd. Hollow porous membrane and process for producing the same
US20120018371A1 (en) * 2009-03-26 2012-01-26 Pierre Lucien Cote Non-braided reinforced holow fibre membrane
CN102365125A (en) * 2009-03-26 2012-02-29 Bl科技公司 Non-braided reinforced hollow fibre membrane
AU2010228091B2 (en) * 2009-03-26 2016-06-16 Bl Technologies, Inc. Non-braided reinforced hollow fibre membrane
WO2010108285A1 (en) * 2009-03-26 2010-09-30 Asteia Technology Inc. Non-braided reinforced hollow fibre membrane
CN104941459A (en) * 2009-03-26 2015-09-30 Bl科技公司 Non-braided reinforced hollow fiber membrane
US9132390B2 (en) * 2009-03-26 2015-09-15 Bl Technologies Inc. Non-braided reinforced holow fibre membrane
JP2012521279A (en) * 2009-03-26 2012-09-13 ビーエル・テクノロジーズ・インコーポレイテッド Non-woven reinforced hollow fiber membrane
CN102365125B (en) * 2009-03-26 2015-07-08 Bl科技公司 Non-braided reinforced hollow fibre membrane
EP2448658A4 (en) * 2009-06-26 2013-11-06 Bl Technologies Inc Non-braided, textile-reinforced hollow fiber membrane
JP2012530594A (en) * 2009-06-26 2012-12-06 ビーエル・テクノロジーズ・インコーポレイテッド Hollow fiber membrane reinforced with non-braided fabric
AU2016234906B2 (en) * 2009-06-26 2018-04-12 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
EP2448658A1 (en) * 2009-06-26 2012-05-09 BL Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
AU2010265772B2 (en) * 2009-06-26 2016-07-07 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
US9061250B2 (en) 2009-06-26 2015-06-23 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
CN103097593A (en) * 2010-07-13 2013-05-08 三菱丽阳株式会社 Process for producing fibers and apparatus for producing fibers
KR20140012939A (en) * 2010-09-15 2014-02-04 비엘 테크놀러지스 인크. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
US9221020B2 (en) 2010-09-15 2015-12-29 Bl Technologies, Inc. Method to make yarn-reinforced hollow fiber membranes around a soluble core
KR101985552B1 (en) 2010-09-15 2019-06-03 비엘 테크놀러지스 인크. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
KR20190022902A (en) * 2010-09-15 2019-03-06 비엘 테크놀러지스 인크. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
WO2012036935A1 (en) * 2010-09-15 2012-03-22 Bl Technologies, Inc. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
CN103097008A (en) * 2010-09-15 2013-05-08 Bl科技公司 Method to make a yarn-reinforced hollow fibre membranes around a soluble core
KR102171580B1 (en) 2010-09-15 2020-10-29 비엘 테크놀러지스 인크. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
AU2011302393B2 (en) * 2010-09-15 2016-09-08 Bl Technologies, Inc. Method to make a yarn-reinforced hollow fibre membranes around a soluble core
KR20130137188A (en) * 2010-12-15 2013-12-16 제너럴 일렉트릭 캄파니 Supported hollow fiber membrane
WO2012082441A2 (en) * 2010-12-15 2012-06-21 General Electric Company Supported hollow fiber membrane
WO2012082441A3 (en) * 2010-12-15 2012-09-27 General Electric Company Supported hollow fiber membrane
KR101904559B1 (en) 2010-12-15 2018-10-04 제너럴 일렉트릭 캄파니 Supported hollow fiber membrane
US8529814B2 (en) 2010-12-15 2013-09-10 General Electric Company Supported hollow fiber membrane
JP2012152705A (en) * 2011-01-27 2012-08-16 Nok Corp Method for manufacturing fiber reinforced porous hollow fiber membrane
US9321014B2 (en) 2011-12-16 2016-04-26 Bl Technologies, Inc. Hollow fiber membrane with compatible reinforcements
US20160184777A1 (en) * 2011-12-22 2016-06-30 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
US9643129B2 (en) 2011-12-22 2017-05-09 Bl Technologies, Inc. Non-braided, textile-reinforced hollow fiber membrane
US9022229B2 (en) 2012-03-09 2015-05-05 General Electric Company Composite membrane with compatible support filaments
US8999454B2 (en) 2012-03-22 2015-04-07 General Electric Company Device and process for producing a reinforced hollow fibre membrane
CN104203376A (en) * 2012-03-22 2014-12-10 通用电气公司 Device and process for producing a reinforced hollow fibre membrane
WO2013142000A1 (en) * 2012-03-22 2013-09-26 General Electric Company Device and process for producing a reinforced hollow fibre membrane
US9227362B2 (en) 2012-08-23 2016-01-05 General Electric Company Braid welding

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