KR101560074B1 - Knitted cord drawing out method, method of manufacturing porous film, and knitted cord supply apparatus - Google Patents

Abstract

The drawing method is stored in the storage container 120 or draws the knob 110 wound on the bobbin 170 in a state in which the storage container 120 or the bobbin 170 is stopped. If the knee 110 having the product of the torsion recovery rate and the torsion torque is 14 g · cm or less is delivered by this method, the knee 110 does not cause the knot to be knotted. In the manufacturing method of the porous films 26 and 150, the porous film layer 151 is formed on the outer peripheral surface of the guide 110 by applying the film forming stock solution 25 to the outer peripheral surface of the guide 110 and solidifying it. The feeding device 210 has a container 120 and a guide member 214 and pulls the side 110 accommodated in the container 120 toward the guide members 124 and 214. According to the present invention, since the turntable for rotating the container 120 is unnecessary, the maneuver 110 is delivered with a simple mechanism.

Description

TECHNICAL FIELD [0001] The present invention relates to a method of manufacturing a porous membrane, a method of manufacturing the porous membrane, a method of manufacturing the porous membrane,

The present invention relates to a production method of a porous membrane (porous hollow fiber membrane) having a hollow strength support in the interior thereof, and a feeding device for feeding a lubricant support in a porous membrane (porous hollow fiber membrane) to the spinning nozzle. The present application claims priority based on Japanese Patent Application No. 2011-024027 filed on February 7, 2011, and Japanese Patent Application No. 2011-089093 filed on April 13, 2011 , Its contents are used here.

In recent years, attention has been paid to a method using a narrow tube-like porous film as a water treatment method due to heightened interest in environmental pollution and strengthened regulations.

In the fields of the food industry, the medical industry, and the electronic industry, a porous hollow fiber membrane (also referred to as a porous membrane in the present specification) is used for the purpose of concentration, recovery, removal of unnecessary components, A microfiltration membrane, an ultrafiltration membrane, a reverse osmosis filtration membrane, and the like. As the porous hollow fiber membrane, for example, a hollow braid support having a plurality of threads thereon, or a hollow braid support having a single row of circular seams (hereinafter referred to as " A porous hollow fiber membrane having a porous membrane layer formed on the outer side of a support (hereinafter, simply referred to as " support "). This porous hollow fiber membrane has excellent mechanical properties because it has a support and does not cause problems such as breakage even under more severe conditions.

In such a porous hollow fiber membrane, a spinning stock solution for forming a support and a porous film layer is supplied to a spinning nozzle, and the spinning nozzle is spun to coat the spinning stock solution on the outer side of the spinning nozzle to coagulate the coagulating solution, , Drying, and the like (see, for example, Patent Document 1).

In addition to high separating characteristics and excellent water permeation performance, the porous film also needs mechanical strength not to break the porous membrane against the tensile force acting on the porous membrane in use under harsh conditions

As a porous film excellent in mechanical properties, a hollow porous film in which a porous film layer is formed on the outer circumferential surface of a support made of a hollow knitted fabric having yarns is often used. In the case of producing such a hollow porous film, first, the support is drawn to the center of the spinning nozzle, the undiluted solution of the film forming in a hollow state by the spinning nozzle is coated on the outer circumferential surface of the support and solidified to form a porous film layer (Solidification step). Thereafter, the porous film is dried by a drying step.

The joy to be used as a support is usually produced by a kneading machine and then wound and held in a winding container such as a storage container or a bobbin. Therefore, when the joy is used in the production of the porous film, the support is drawn out from the wind-up port and supplied to the spinning nozzle.

The following method is used as a method of winding the joys at high density without winding the torsion which hinders the storage stability.

For example, when a cylindrical storage container is used as a winding cowl, the storage container is first placed on a turntable rotating at a rotation speed set according to the manufacturing speed of the jolt, and the storage container is rotated. Then, the jig is fed from the fixed guide provided on the upper opening surface of the storage container into the rotatable storage container. At this time, by slightly shifting the center of the storage container and the rotation center of the turntable, the joy is stacked and stacked from the bottom of the storage container toward the top while shifting in the rotational direction of the storage container while drawing the locus of the loop configuration .

However, when the joy stored in the storage container in this form is taken out from the storage container and supplied to the spinning nozzle, if the joy is taken out from the end (ending end) of storing the joy as it is, One torsion is generated in each journals and the torsion is easily accumulated in a place where the torsion is likely to accumulate, for example, a low tension portion acting on the journals, or a lower portion of a guide string guide which hinders the journals from passing while being twisted When the torsion of the joy that accumulates can not be maintained in the form of a torsion around the joy of the joy, the torsion occurs and eventually a torsion knot (also called a torsion knot) is generated, and a torsion knot The additional downstream is moved. These causes are thought to be as follows.

That is, when the energy accumulated in the form of a torsion around the central axis of the joy increases, a part of the joy that is thought to be capable of accumulating more energy at a smaller energy level than the torsion forms a ring and forms a ring One junior is twisted and turns into a twisted twisted part like a twisted line. By doing so, much of the energy accumulated in the form of torsion until then is converted into the form of a twisted knot, and the joy again begins to accumulate energy in the form of a torsion around the central axis of the joy, .

If this twisted knot is formed, the twisted portion is caught in the fixed guide or spinneret, which may cause the operation of the porous film production apparatus to stop.

As a method of pulling out a wire wound around a winding-up port while suppressing the occurrence of twist, there is known a method of using a rotating means such as a turntable to pull out a wire while rotating the winding-up port (for example, refer to Patent Documents 2 to 4 Reference.).

Therefore, this method is also adopted when the joy is pulled out from the storage container, and the joy is pulled out while the storage container is placed on the turntable and the storage container is rotated in the same rotational speed as that at the time of storing the joy.

Recently, a porous film using a threaded hollow cylindrical web as a support has also been proposed. As in the case of the sketch of this sketch, since it was thought that one torsion was generated in the saddle every time the loop of the saddle was pulled out while the loop of the saddle was pulled out from the storage container, and the torsion was caused by the torsion, The storage container was placed on the turntable, and the storage container was rotated to withdraw the slide.

On the other hand, when a bobbin is used as a winding cigarette, a group of New Newtons (hereinafter collectively referred to as "hollow new") wound around the bobbin while rotating the bobbin is taken out.

The support used for producing the porous hollow fiber membrane is usually stored in a tubular storage container after being manufactured by the Genniger, and is used by being drawn out from the storage container at the time of manufacturing the porous hollow fiber membrane. For example, the following method is used to store the support.

A tubular storage container having a core bar formed at the center thereof is placed on a turntable and rotated, and a support is fed into the container. At this time, the center of the storage container and the rotation center of the turntable are shifted to some extent. Thus, stacking is carried out while drawing a locus of a loop configuration so that a support body surrounds the mandrel from the bottom of the housing container toward the top (Patent Document 5).

International Publication No. 2004/043579 Japanese Unexamined Patent Publication No. 1-285563 Japanese Laid-Open Patent Publication No. 2005-200179 Japanese Utility Model Utility Model Publication No. 5-19259 Japanese Patent Application Laid-Open No. 2009-263052

However, in the method of pulling out the hollow cylinder while rotating the housing container or the bobbin, the facility is large-scale. Particularly, when a storage container is used as a winding cowl, it is necessary to put the storage container on the turntable in order to rotate the storage container, so that the storage container can not be placed directly on the floor and the space can not be utilized effectively.

In order to continuously draw out the hollow fiber and feed it to the spinning nozzle, the hollow fiber bundle wound around the take-up spool has a finite length. Therefore, It is necessary to connect the starting end (start end) of the hollow core. Normally, it is difficult to connect the end of the hollow fiber to the start end of the next hollow fiber while the winder rotates. Therefore, in order to connect them, the rotation of the windup sleeve is stopped.

However, when the hollow cylinder is housed in the housing container, it is necessary to place the housing containers on the same turntable after the connection is completed to resume the rotation. Since there is a limit in the number of the storage containers that can be placed on the turntable, when the extraction of the hollow cylinder progresses and the hollow cylinder on the turntable becomes smaller, the rotation is stopped again. And the container was placed on the turntable. In this case, it was necessary to repeat the operation as described above, which resulted in troublesome work. In addition, since one tongue is generated each time the loop is loosened in the hollow cylinder drawn out while the rotation of the storage container is stopped, it is necessary to quickly connect the hollow tubes.

Further, when a plurality of porous films are produced at one time, since a hollow nozzle is simultaneously supplied to a number of spinning nozzles corresponding to the number of the porous films, a turntable capable of placing a storage container for the number of spinning nozzles is required. In addition, when connecting the hollow pipes, the number of connection increases as the number of storage containers increases. Particularly, the faster the drawing speed, the shorter the time required for loops of a single loop of the hollow wire in the storage container becomes, so that the connection of the hollow wire must be completed in a shorter time.

As described above, when the hollow cylinder is continuously supplied, there is a problem in operation.

On the other hand, when the hollow core is wound on the bobbin, the rotation of the bobbin is stopped, and the hollow fiber is not supplied during this period, so that the production of the porous film is stopped once, and the production efficiency is deteriorated.

In addition, the support accommodated by the method of Patent Document 5 may be entangled by being pulled out from the accommodating container and feeding it to the spinning nozzle, for example, by being caught on the body portion of the accommodating container, a shaft or the like.

When the support is intertwined, the support supply tension suddenly rises, and the support slips in the support transport mechanism part, making it impossible to feed the support to the downstream, or the support container hangs up and collides with the support guide and breaks, , There arises a problem that the running is interrupted by the support guide and the spinning nozzle.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is an object of the present invention to provide a method for manufacturing a porous membrane, which is capable of stably producing a porous membrane while suppressing occurrence of kinks, To provide a method that

It is another object of the present invention to provide a device for feeding a knee support to a spinning nozzle, and to provide a knee feeder in which the knee support is not entangled and excellent process stability is obtained in the production of a porous hollow fiber membrane.

As a result of intensive studies, the inventors of the present invention have found that a joy made up of a plurality of yarns is excellent in torsional resistance, but is easy to stretch when stretched (inferior in stretchability) (Torsion torque) does not occur when the knee is twisted. If torsion occurs in the knee, the torsion is stably discharged downstream in the form of a torsion, and the torsion is accumulated in the region where the string tension is low As a result, it is difficult for the twist knot to occur, and it is unnecessary to use a rotating means such as a turntable. Thus, the present invention has been accomplished.

As a result of intensive studies, the inventors of the present invention have found that a cord having a certain characteristic can be stably pulled out without generating a twisted part when it is pulled out. The restoration ratio x torsion torque), and the present invention has been accomplished.

The present invention has the following aspects.

According to a first aspect of the present invention, there is provided a method of drawing a knee from a wind-

And withdrawing the draft from the winding opening while the winding opening is stopped.

The second aspect of the present invention is the one-way draw-out method according to the first aspect, wherein the above-mentioned maneuver has a torsion pull-out inner clearance X defined below as 14 g · cm or less.

Torsion restoration ratio A: (ratio of the number of torsions loosened five times in a state in which 30 g of weight is attached to the lower side of the 30 cm long knee and the knee is twisted five times in the vertical direction)

Torsion torque B: (When a 30-gauge weight is attached to the bottom of a 30-cm-long manneuver and twisted five times in the vertical direction, the load acting on the knee in the direction opposite to the lace direction g) × Distance from the center of string of maneuver to load measurement point (cm) = torsion torque (g · cm)

Torsion withdrawal inertia X = torsion recovery rate A x torsion torque B (g · cm)

A third aspect of the present invention is a manufacturing method of a porous film which draws a hollow nailing support from a take-up port, applies a stock solution to the outer peripheral surface of the nailing support, and solidifies to form a porous membrane layer on the outer peripheral surface of the nailing support,

In a state where the winding-up port is stopped,

And pulling out the nourishing supporter from the take-up port.

The fourth aspect of the present invention is the method for producing a porous film according to the first aspect, wherein the hollow nappy support has a torsion pulling backrest X defined below as being 14 g · cm or less.

Torsion Recovery Rate A: (The number of torsion loosened when a 30-gauge weight was attached to the bottom of the 30-cm length knee, the knee was braided 5 times in the vertical direction, Split ratio)

Torsion torque B: (When a 30-gauge weight is attached to the bottom of a 30-cm-long manneuver and twisted five times in the vertical direction, the load acting on the knee in the direction opposite to the lace direction g) × Distance from the center of string of maneuver to load measurement point (cm) = torsion torque (g · cm)

Torsion withdrawal inertia X = torsion recovery rate A x torsion torque B (g · cm)

A fifth aspect of the present invention is a one-way feeding device for feeding the above-described knee supporter to a spinneret for radiating a coating film stock solution for forming a porous film layer on an outer circumferential surface of a hollow-

A wind-up port for receiving the knee support,

A guide member,

And the knee supporter is pulled out from the winding opening toward the guide member.

Further, another preferred embodiment of the present invention is characterized in that, in order to connect each of the lane supporting bodies wound on a plurality of take-up openings, a winding start end of the lane support wound on an arbitrary winding opening, It is preferable that the end is connected.

According to another preferred embodiment of the present invention, the winding-up port is a cylindrical storage container, and the lane supporting member is stacked and stacked from the bottom to the top of the storage container while drawing a locus of a loop configuration, The support is pulled out in the vertical direction with the axial direction of the container facing the vertical direction.

Particularly, it is preferable that a core rod is mounted on the central portion of the storage container, and the placement locus of the knee support body surrounds the mandrel.

It is preferable that the winding hole is a bobbin, and the knee support is wound around the bobbin to draw out the knee support in the direction of the central axis of the bobbin around which the knee support is wound.

According to another preferred embodiment of the present invention, there is provided a one-way feeding device for feeding the above-described knee supporter to a spinneret for radiating a coating film forming liquid for forming a porous film layer on the outer side of a hollow-

A tubular storage container for storing the above-mentioned knee support, and a guide member formed on the storage container,

And the knee supporter is drawn out from the storage container toward the guide member.

It is preferable that the side feeding device of the present invention further has a tension applying means for applying a tension to the knitted fabric support pulled out from the storage container before supplying the spinning nozzle.

According to the method for producing a porous membrane of the present invention, it is possible to stably produce a porous membrane by supplying a support with a simple mechanism while effectively utilizing space while suppressing the occurrence of kinks, even when the support is continuously drawn .

Further, by using the line feeder of the present invention, the liner support to be fed to the spinneret is not entangled, and excellent process stability is obtained in the production of the porous hollow fiber membrane.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a structure of a knee supporter used in the present invention. Fig.
2 is a longitudinal sectional view showing an example of a storage container used in the present invention.
3 is a longitudinal sectional view showing an example of a storage container of the line feeder of the present invention.
Fig. 4 is a schematic configuration diagram showing an example of a storage device used when storing the knee support in a storage container. Fig.
Fig. 5 is a plan view showing an example of the locus of placement of the line support sup- ported in the storage container. Fig.
Fig. 6 is a view for explaining a method of pulling out the knee support from the storage container. Fig.
7 is a view for explaining a method of pulling out the knee support from the storage container.
Fig. 8A is a perspective view showing an example of a connecting device used for connecting a knee support. Fig.
8B is a view showing a state in which the knee support is inserted into the connection jig of the connection apparatus of Fig. 8A. Fig.
9 is a schematic sectional view showing an example of a porous film.
10 is a schematic structural view showing an example of a device for forming a porous film layer on the outer peripheral surface of a knee support.
11 is a schematic view showing an example of a line feeder of the present invention.
12A is a schematic structural view showing an example of a winding device used when winding a knurled support on a bobbin.
12B is a schematic configuration diagram showing another example of the winding device.
13 is a view for explaining an example of a method of pulling out the knee support from the bobbin.
14 is a view for explaining another example of a method of pulling out the knee support from the bobbin.
Fig. 15 is a schematic configuration diagram showing an apparatus for producing a porous membrane used in Examples. Fig.
16 is a front view showing the structure of the jugular support.

(Torsional restoration ratio) of the used string and the torsion-generated string return to the original state (e.g., the torsional stiffness of the string) (Torsion torque), that is, the reaction force (torsion torque).

The maneuvers used in the method of the present invention according to the present invention were evaluated by the following evaluation method 1 or evaluation method 2, for example.

(Evaluation Method 1)

First, a 30 cm cord is twisted 5 times with 30 g of cord hanging.

Hold for 30 seconds in the braided state. Torsion is restored naturally while holding the braided strap by hand to prevent it from recoiling and turning. From the first braided point, the number of loosened points was measured (n = 4).

The results are shown in Table 1

(Evaluation Method 2)

First, a 30 cm cord is twisted 5 times with 30 g of cord hanging.

The load applied to the load cell by the indicator rod fixed to the weight was measured. The value obtained by multiplying the load cell action point by the center distance (12 cm) of the string was regarded as a torsion torque (g · cm) (n = 4).

The results are shown in Table 2.

Torsion pull-out stability (torsion recovery rate x torsion torque)

The torsion pullout stability (torsion recovery rate x torsion torque) was determined for the journals A, B, and A, B that were used. The results are shown in Table 3.

It can be seen from the above results that if the torsion recovery ratio A x torsion torque B of the string used in the present invention is 14 g · cm or less, a twisted knot portion generated when the strap in a stopped state is taken out is not generated, I knew I could. Further, the inventors of the present invention have studied the example, and it is more preferable that the torsion withdrawal static X is 10 g · cm or less, and it is most preferable that the torsion withdrawal static X is 5 g · cm or less. The characteristic in which such a twisted knot does not occur was observed only in the knee, but not in the jungle.

[First Embodiment]

A first embodiment of a method for producing a porous membrane (also referred to as a porous hollow fiber membrane) of the present invention will be described in detail with reference to the drawings.

The method for producing a porous film according to the first aspect of the present invention according to the first embodiment comprises a step of taking out a hollow upper support from a storage container using a storage container as a winding opening (withdrawing step), and a step (Solidification step) of forming a porous membrane layer on the outer peripheral surface of the knee support by applying the undiluted solution and solidifying it.

<Drawing Process>

(Lane support)

Fig. 1 shows a structure of a knee supporter 110 used in the present invention.

The navel supporter 110 is a cylindrical (hollow) one-sided line of a thread 111.

As shown in Fig. 1, the loop is used to knit a tubular warp knitted fabric using a circular knitting machine, and a continuous loop 112 is formed by curving the yarn 111 and extending spirally, The loop 112 is connected vertically and horizontally, and has a nose 113 at the connection between the loops 112 and between the loops 112.

The knitted supporter 110 is different in structure from the grooved support 12 having a structure in which a plurality of yarns 11, 11, ... are interwoven as shown in Fig.

The cylindrical supporting member 110 is formed by circularly knitting the yarn 111 by a circular knitting machine to produce a cylindrical knitted fabric and then heating the knitted fabric to a temperature lower than the melting point of the fibers constituting the kneading, It is preferable that the elongation compression heat treatment is performed so as to pass the drawing die and take it out to the take-up roll downstream of the die outlet. By performing the elongation compression heating treatment, the elongation of the knee can be greatly reduced and the stability of the diameter can be given.

Examples of the shape of the thread 111 include multifilament, monofilament, spun yarn and the like.

Examples of the fibers constituting the yarn 111 include synthetic fibers, semisynthetic fibers, regenerated fibers and natural fibers. The thread 111 may be a combination of a plurality of kinds of fibers.

Examples of synthetic fibers include polyamide fibers such as nylon 6, nylon 66 and aromatic polyamide; polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polylactic acid and polyglycolic acid; polyacrylonitrile Polyolefin fibers such as polyethylene and polypropylene, polyvinyl alcohol fibers, polyvinylidene chloride fibers, polyvinyl chloride fibers, polyurethane fibers, phenol resin fibers, polyvinylidene fluoride, polytetrafluoro Fluorine resin fibers such as ethylene; polyalkylene paraoxybenzoate fibers; and the like.

Examples of the semisynthetic fiber include cellulose-derived system fibers derived from cellulose diacetate, cellulose triacetate, chitin, chitosan, etc., and protein-based fibers called pro-mix.

Examples of the regenerated fiber include a viscose method, a copper-ammonia method, and a cellulose-based regenerated fiber (rayon, cupra, polynosic, etc.) obtained by an organic solvent method.

As the fibers constituting the yarn 111, multifilaments of synthetic fibers are preferable in view of the effect of the above-described stretch compression heat treatment. Particularly, polyester fiber, acrylic fiber, polyvinyl alcohol fiber, polyamide fiber and polyolefin fiber are preferable, and polyester fiber or acrylic fiber is particularly preferable in view of excellent chemical resistance.

The fineness of the yarn 111 is preferably 150 to 1000 dtex in view of improving the durability of the hollow porous film (porous hollow fiber membrane) and the adhesion to the porous membrane layer. If the fineness of the yarn is 150 dtex or more, the compression of the obtained porous film is improved although it depends on the outer diameter. When the fineness of the yarn is 1000 dtex or less, deterioration of the water permeability due to the reduction of the inner diameter is suppressed.

The number of noses 113 is preferably 5 or more per circumference. The number of noses 113 is equal to the number of knitting needles of the circular knitting machine. When the number of the nose 113 is 5 or more, the cross-sectional shape of the hollow portion of the knee support 110 becomes circular, and deterioration of the water permeability due to the reduction of the inner diameter is suppressed.

The upper limit of the number of the nose 113 is determined by the outer diameter of the knee support 110, the fineness of the thread 111, the size of the nose 113 (size of the loop 112) When the nose 113 is large, there is a possibility that the undiluted supernatant fluid will flow into the inside of the ninth supporter 110 when the undiluted supernatant fluid to be described later is applied to the ninth supporter 110, thereby blocking the hollow portion. Therefore, in the case of manufacturing the knee supporter 110 having the same outer diameter, it is necessary to set the number of noses to be small when the fineness of the thread 111 is high and to increase the number of noses when the fineness is low.

The outer diameter of the knee supporter 110 is determined by the outer diameter of the finally obtained hollow porous film (porous hollow fiber membrane).

The outer diameter of the porous membrane is preferably from 0.9 to 6.0 mm, more preferably from 1.0 to 3.5 mm, from the required filtration area in the membrane module in which the porous membrane is bundled. Therefore, the outer diameter of the knee supporter 110 is preferably 0.7 to 5.0 mm, more preferably 0.9 to 3.0 mm.

Examples of the use of the maneuver used in the present invention include, but are not limited to, the following (a) to (e).

(a) a porous membrane support

(b) The precursors are subjected to chlorination after decanting or after chlorination, and then carbonized to obtain hollow chlorinated nanocarbon fibers

(c) a fiber reinforced pipe (for example, a carbon fiber is tubular knitted fabric, high strength PET or the like is formed of thermoplastic or thermosetting resin)

(d) Artificial blood vessel skeleton (e.g., titanium fiber, PTFE fiber tubular knitting, PET resin bind, etc.)

(e) Fiber reinforced hose (for example, blade hose, etc.)

Among them, it is preferable to use the knee for the production of a porous membrane.

(Storage container)

Fig. 2 shows an example of the storage container 120 used in the present invention.

The storage container 120 of this example is cylindrical, and a mandrel 121 is mounted at the center. The minimum diameter of the loop drawn naturally by the knee support is largely determined by the flexibility of the knee support when the knee support is stored in the storage container 120 at a constant speed. In the case where stacking is carried out from the bottom portion 122 of the storage container 120 toward the upper portion 123 while drawing the locus locus of the loop support on the loop support member in detail, There is a case where a space in which the knee support is not disposed is generated in the center of the housing. When the mandrel 121 is mounted on the storage container 120, the portion where the lid support is not disposed can be filled, and the storage form is more stable.

The material of the storage container 120 is not particularly limited, and examples thereof include plastic such as paper, polyethylene, and polyethylene terephthalate (PET), iron, and stainless steel.

The inner diameter and depth of the storage container 120 can be appropriately determined by the storage amount of the napkin support 110 and the like.

The outer diameter and height of the mandrel 121 of the storage container 120 can be appropriately determined by the storage amount of the napkin supporter 110 and the like.

The outer diameter of the accommodating container 120 is appropriately selected depending on the storage amount of the nailing support, the drawing form of the nailing support, and the like.

(Method of storing the nailing support in the storage container)

An example of a method of accommodating the liner support in the storage container 120 will be described with reference to Fig.

Fig. 4 is a schematic structural view showing an example of a storage device used when housing the ninth support body. The accommodating unit 130 of this example includes a cylindrical accommodating container 120 for accommodating the nourishing supporter 110, a turntable 131 for rotating the accommodating container 120, (Not shown).

The turntable 131 for rotating the storage container 120 is not particularly limited as long as the storage container 120 can be easily installed and the rotation number R can be periodically changed. Preferably, the turntable 131 can set a variation pattern of the number of rotations R of the storage container 120 in advance, and can set the number of rotations R will be.

The supply guide 132 is mounted above the storage container 120 and near the inner wall surface of the storage container 120. Here, "near the inner wall surface" means a range within 20 mm from the inner wall surface. When the supply guide 132 is mounted in this manner, the knee support 110 can be housed in the storage container 120 more uniformly.

The supply guide 132 is not particularly limited as long as it can pass through the nailing support 110 and can fix the feeding position of the napping supporter 110. However, Is preferable. Further, it is more preferable that the ring-shaped surface has a smooth shape free from burrs and the like.

The knee support 110 is placed in the storage container 120 while the knee supporter 110 is fed into the rotating storage container 120 at a constant speed via the supply guide 132 using the storage device 130. [ . As shown in Fig. 5, the knee supporter 110 draws the locus of the loop-shaped arrangement in that the knee supporter 110 is more easily suppressed from being entangled when taken out, It is preferable that the laminated material is housed in the stacking direction from the bottom portion 122 of the storage container 120 toward the upper portion 123 while shifting in the direction of the rotation axis of the storage container 120.

When the knee support 110 is housed so that the placement locus of the knee support body 110 surrounds the mandrel 121, the loop is shifted during transportation and handling of the container so that the upside and downside are reversed so that entanglement of the knee support body during withdrawal is suppressed There is also an effect.

The method of accommodating the folding support 110 in the storage container 120 is not limited to the method shown in Fig. 5 as long as it is a method of suppressing entanglement of the folding support when pulling out.

It is preferable that the end of the knitted supporter 110 (the start of the take-up) is taken out of the storage container 120 when the storage of the knitted supporter 110 into the storage container 120 is started. When the starting end is directed to the outside of the storage container 120, it is easy to connect the laterally supporting member accommodated in the next storage container in connection of the laterally supporting member described later. That is, it is easy to connect the storage start end and the storing end end of the laterally supporting body 110 housed in the next storage container 120, and to supply the kneading support 110 continuously to the spinning nozzles 161 and 220 .

(Draw-out method of the nailing support from the storage container)

An example of a method of pulling out the folding support 110 stored in the storage container 120 as described above from the storage container 120 will be described with reference to FIG.

In this embodiment, the knee support 110 is pulled in the crimping direction from the storage container 120 while the storage container 120 is stopped. Specifically, as shown in Fig. 6, it is preferable that the knee supporter 110 is pulled out in the vertical direction with the axial direction of the storage container 120 in the vertical direction.

In addition, the knee support 110 is taken out from the end of the storage in the storage container 120 (winding end).

6, on the approximately extended line of the storage container 120 in the upward direction of the storage container 120, that is, in the direction in which the knee support 110 is drawn out, A draw-out guide 124 for fixing the position of the knee supporter 110 in the horizontal direction is mounted at a position distant from the storage container 120 several tens of times and the knee supporter 110 ). When the withdrawing guide 124 is attached, the speed at which the loop support 110 is pulled out and the resistance at which the loops are loosened is likely to be stabilized when the loops of the loop support 110 stored in the storage container 120 are pulled out.

The drawing guide 124 is not particularly limited as long as it can pass through the nailing supporting member 110 and can fix the position of the drawn napping supporting member 110 in the horizontal direction. A ring shape larger than the outer diameter is preferable. Further, it is more preferable that the ring-shaped surface has a smooth shape free from burrs and the like.

Another example of a method of pulling out the folding support 110 stored in the storage container 120 from the storage container 120 as described above will be described with reference to FIG.

It is preferable that the storage container 120 is placed in a stationary state on a floor or the like in order to simplify the apparatus and effectively utilize the space.

When the support is stored in the storage container so as to draw the locus of the loop shape and is pulled out as it is, one torsion is generated in the groove each time the loops of the groove are loosened and pulled out, , The twisted knot is formed irregularly, and the twisted knot part moves to the downstream with the movement to the jaw, so that the yarn is caught by the spinning nozzle. As a method for solving such kinks, there is a method of using a turntable or the like to pull out the support body while rotating the housing container in the opposite direction to that of the housing. However, when this method is adopted, the facility becomes large- I can not. On the other hand, unlike the journalsupport body 8, as described above, since the journalsupport body 110 does not generate a large torsion reaction force like journals when the journals are twisted in spite of the excellent elasticity, Even if a torsion is generated by being drawn out from the container 120 as it is, the torsion is not accumulated in a specific portion, and the twisted knitted state is stably transferred along with the movement of the string.

Further, the storage container 120 may be placed on a turntable, and the storage container 120 may be rotated in a direction opposite to that in which the storage container 120 is stored when the knife support 110 is taken out.

(Manual feeder)

The present invention is characterized in that a guide member 214 is formed on a storage container 120 in the present invention. The guide member 214 is formed on the storage container 120 so that the guide support body 110 pulled up from the storage container 120 is caught by the eastern portion of the storage container 120 or the stem 121, It is possible to restrain the irregular force from being applied by contact with the shaft 121 or the like. As a result, entanglement of the knee supporter 110 drawn out from the storage container 120 is suppressed.

Examples of the guide member 214 include guide rolls made of metals or ceramics, plastic guide rolls made of polyethylene, PET, Teflon (registered trademark), or the like.

The height of the guide member 214 is preferably 1.5 m or more, more preferably 2.0 m or more, more preferably 2.0 m or more, in view of easy restraint of entanglement by being pulled by the eastern portion of the storage container 120 or the stem 121 Is more preferable. The height of the guide member 214 is preferably 5.0 m or less, more preferably 4.0 m or less in order to improve workability such as maintenance.

The height of the guide member 214 means the distance from the bottom 122 of the storage container 120 to the guide member 214. [

When the straight line connecting the guide member 214 and the lower corner 212d farthest from the guide member 214 in the storage container 120 is a straight line m, The angle? (Fig. 1) formed by the bottom portion 122 of the storage container 120 is preferably 60 degrees or more, more preferably 60 degrees or more, from the viewpoint of restraining entanglement by being hooked on the eastern portion of the storage container 120 or the stem 121, And more preferably 70 DEG or more. The angle? Is preferably 85 占 or less, more preferably 80 占 or less, from the viewpoint of suppressing the guide member 214 from becoming too high.

A tension applying means 216 for applying a tension to the knitted fabric support 110 pulled out from the storage container 120 before feeding the spinning nozzle 220 is provided in the present invention . As a result, even if a slight twist occurs in the line support 110 during traveling, the twist can be solved by using the friction when the tension is applied. In addition, loosening of the knee support 110 during feeding to the spinneret 220 can be suppressed, so that feeding of the knee supporter 110 to the spinneret 220 can be performed more stably .

As the tension applying means 216, for example, two guides (not shown) for regulating the travel of the knee support 110 between the guide member 214 on the storage container 120 and the spinneret 220, The metal rods 216a and 216b are formed between the members 218 and the tension of the knee supporter 110 is made to run smoothly. The tension applying means 216 may be a linear dancer or the like as long as it can impart tension to the knee support 110. [

The guide member 218 regulates the travel of the knee support 110 until it is supplied to the spinneret 220 and the same ones as those illustrated for the guide member 214 can be used.

(Connection Method of Lane Support)

The kneading support 110 drawn out from the storage container 120 is supplied to the following solidification step.

Since the knee support 110 housed in the storage container 120 has a finite length, in order to continuously draw out the knee supporter 110 and supply it to the coagulation step, the respective knee supporters housed in the plurality of storage containers are connected .

Specifically, as shown in Fig. 6 and Fig. 7, a plurality of lane supporting bodies 110 accommodated in any of the receiving containers 120 (120a) are connected so that each of the lane supporting bodies 110 accommodated in the plurality of receiving containers 120 is connected A winding start end (also referred to as a receiving end) a11 of the first support 110b and a winding ending end (also referred to as a receiving end) b12 of the laterally supporting member 110b housed in the next receiving container 120b are connected , The winding start end b11 of the knee support 110b housed in the storage container 120b is connected to the winding end c12 of the knee support 110c housed in the next storage container 120c .

When each of the nourishing supporters 110 housed in the plurality of accommodating containers 120 is connected as described above, all the nourishing supporters 110a are taken out from any of the accommodating containers 120a, It is possible to perform a continuous drawing operation in which the support body 110b is pulled out and all the knee support bodies 110b are pulled out and the knee support body 110c is pulled out from the next storage container 120c.

The method of connecting the nylon supporter is not particularly limited as long as the process after the solidifying step can be stably passed through the connected nylon supporter. For example, the following methods can be mentioned.

(1) A method in which the end portions of the two knurled support bodies to be connected are overlapped by several mm to several tens mm, and the overlapped portions are fused and bonded by ultrasonic waves.

(2) Ten-millimeters of each string having excellent bendability is inserted into the hollow portion of the two knee support supporters to be connected, the fibers or the like are wound around a portion of several tens mm in which the string is inserted from the surface of the knee supporter, (Connection) by friction between the surface of the string-shaped article and the inner surface of the hollow-phase maneuver (knee support) hollow part.

(3) A method in which an elastic adhesive is applied to the outer periphery of a tie having excellent bendability, and the adhesive application portion of the tie is inserted into the hollow portion of the two knee supporters to be connected and bonded.

(4) A method in which end portions of two knee guard bases to be connected face each other, and both ends are connected by metal connecting members such as a stapler.

Among these connection methods, since it is possible to connect in a short time without requiring a subsidiary member at the time of connection, and furthermore, the diameter of the knee support after connection can be suppressed to be not more than the diameter of the knee support before connection, (1) is preferable because it is excellent in the permeability into the nozzles (spinneret) of the later-described nailing support and / or it is difficult for knots to form in the formed porous hollow fiber membrane.

As a connection method by ultrasonic waves, for example, a connection apparatus shown in Fig. 8A may be used. The connection device 140 of this example is provided with an ultrasonic horn 141 and a connection jig 142.

The ultrasonic horn 141 is a surface on which the lower surface 141a is in contact with the knee support, and ultrasonic waves are transmitted from the lower surface to the knee support.

The connection jig 142 is a rectangular plate and has a groove 142a formed linearly from one side of the plate toward the side opposite to the side thereof and the depth of the groove 142a It can be stacked and stored.

When connecting the arbitrary storage container to the laterally supporting member housed in the next storage container using the connection device 140 as described above, first, as shown in Fig. 8B, in the groove 142a of the connection jig 142, The support supporters 110a and 110b (also referred to as a storage start end) a11 of the support body 110a and the winding end end (also called a storage end end) b12 of the support supporter 110b are overlapped with each other, ). The tip end of the ultrasonic horn 141 is then inserted into the groove 142a so that the winding start end a11 and the winding end b12 (hereinafter collectively referred to as &quot; both ends &quot; And pressed and deformed at the bottom. Then, the ultrasonic waves are transmitted to the both end portions while keeping the compression and deformation state, and they are fused and connected.

When the ultrasonic horn 141 is used to connect the knee supporters 110a and 110b to each other by fusing them together, local heating due to friction occurs in the kneader supporters 110a and 110b, It may be wetted by the presence of liquid such as water or the like between the fibers of the support members 110a and 110b or the porous portion.

In the above-described connection method using ultrasonic waves, the two knee guard members to be connected are connected in a superposed state, but the present invention is not limited to this. For example, it is possible to enlarge the diameter of the hollow portion of one of the two knee supporters to be connected so as to be equal to or larger than the outer diameter of the one of the two knee supporters to be connected, insert another one of the two knee supporters into the hollow portion, Ultrasonic waves may be transmitted to be fused and connected.

Further, since the connecting portions of the fabric supports in the obtained porous hollow fiber membrane do not exhibit sufficient permeability, the connecting portions are removed after the fabrication. At this time, it is preferable to connect the storage start end and the storage end end of the knitted supporter after coloring them with ink or the like, since it is easy to distinguish the connecting portions of the obtained one of the porous hollow fiber membranes.

<Coagulation step>

In the coagulation step, the raw film forming solution is applied to the outer peripheral surface of the kneaded supporter supplied by the above-described drawing step and solidified to form a porous film having a porous membrane layer 151 formed on the outer peripheral surface of the kneaded supporter 110 as shown in Fig. (150).

The membrane-forming stock solution usually contains a hydrophobic polymer and a hydrophilic polymer.

The hydrophobic polymer is not particularly limited as long as it can form a porous film by a solidification process. Examples of the hydrophobic polymer include polysulfone resins such as polysulfone and polyethersulfone, fluorine resins such as polyvinylidene fluoride, Rhenitrile, cellulose derivatives, polyamides, polyesters, polymethacrylates, polyacrylates, and the like. Copolymers of these resins may be used, and those obtained by introducing a substituent into a part of these resins or copolymers may also be used. Further, homogeneous polymers having different molecular weights may be blended and used, and two or more different kinds of resins may be mixed and used.

Of these, a fluoropolymer, particularly a copolymer composed of polyvinylidene fluoride or vinylidene fluoride and other monomers is excellent in durability against an oxidizing agent such as hypochlorous acid.

Therefore, for example, in the case of producing a porous film to be treated with an oxidizing agent in a removal step to be described later, it is preferable to select a fluororesin as the hydrophobic polymer.

The hydrophilic polymer is added in order to adjust the viscosity of the stock solution for forming the porous film to a range preferable for forming the porous film and to stabilize the film formation state, and polyethylene glycol, polyvinyl pyrrolidone and the like are preferably used. Among these, copolymers in which other monomers are copolymerized with polyvinyl pyrrolidone or polyvinyl pyrrolidone are preferable from the viewpoints of control of the pore diameter of the porous film and strength of the porous film. The hydrophilic polymer may be a mixture of two or more kinds of resins. For example, when a hydrophilic polymer having a higher molecular weight is used, a porous film having a good film structure tends to be easily formed. On the other hand, a hydrophilic polymer having a low molecular weight is preferable in that it is more likely to be removed from the porous membrane in a hydrophilic polymer removing step described later. Accordingly, a homogeneous hydrophilic polymer having a different molecular weight may be suitably blended in accordance with the purpose.

By mixing the hydrophobic polymer and the hydrophilic polymer described above with a solvent (a good solvent) in which they are soluble, a stock solution for film formation can be prepared. To the film-forming stock solution, other additive components may be added as necessary.

There is no particular limitation on the type of the solvent, but in the case of performing the solid-wet spinning coagulation process, the solvent for uniformly mixing with water is selected because the pore diameter of the porous film is adjusted by absorbing the stock film- . Examples of such a solvent include N, N-dimethylformamide, N, N-dimethylacetamide, dimethylsulfoxide, N-methyl-2-pyrrolidone, N-methylmorpholine- One or more of these may be used. In addition, a poor solvent of a hydrophobic polymer or a hydrophilic polymer may be mixed and used within a range that does not impair the solubility of the hydrophobic polymer or the hydrophilic polymer in the solvent. The temperature of the film-forming solution is not particularly limited, but is usually 20 to 40 占 폚.

The concentration of the hydrophobic polymer in the stock solution of the film forming composition is too small or too small to reduce the stability at the time of film formation and tends to make it difficult to form a preferable porous film structure. Therefore, the lower limit is preferably 10% by mass, % Is more preferable. The upper limit is preferably 30% by mass, more preferably 25% by mass.

On the other hand, the lower limit of the concentration of the hydrophilic polymer is preferably 1% by mass, more preferably 5% by mass, in order to make the porous film easier to form. The upper limit of the concentration of the hydrophilic polymer is preferably 20% by mass, more preferably 12% by mass, from the viewpoint of handling property of the stock solution.

The thus prepared film forming stock solution is applied to the outer peripheral surface of the nailing support to form a porous film layer. For example, a porous film layer forming apparatus shown in Fig. 10 may be used for forming the porous film layer.

The porous film layer forming apparatus 160 of this example includes an annular support 110 which is drawn out from a storage container (not shown) and is provided with an annular spinning nozzle 161 for applying a spinning solution to the spinning nozzle 161, A coagulation tank 163 containing a coagulating solution for coagulating the membrane forming solution applied to the fabric supporter 110 and a supporter 110 coated with the undiluted membrane forming solution are placed in a coagulation tank And guide rolls 164 for introducing the guide rolls 163 into the guide rolls 163.

At the center of the spinning nozzle 161, a channel through which the knee supporter 110 passes is formed.

The inner diameter of the channel is slightly larger than the outer diameter of the nail supporter 110 and the inner peripheral surface of the channel of the spinning nozzle 161 and the nail supporter 110 have a constant gap. The gap is determined by the thickness of the coating film, the viscosity of the stock solution, the running speed of the kneading supporter 110, and the like, and is usually 0.15 to 0.25 mm.

In addition, if a spinning nozzle in which a film-forming solution discharge port on the slit is formed on the upstream side and the downstream side at two points in the circumferential direction of the channel is used in the middle of the channel, two types of film- have.

When the porous film layer forming apparatus 160 is used, the stock solution is supplied from the undiluted solution supplying means 162 in a predetermined amount when the funnel supporting body 110 forms a duct of the spinning nozzle 161, And a coating film having a predetermined film thickness is formed. When two kinds of film forming stock solutions are applied, first, the first film forming stock solution is applied to the outer peripheral surface of the knee support, and then the second film forming stock solution is applied onto the first film forming stock solution.

The nailing support 110 coated with the stock film-forming solution is guided by a guide roll 164 to a coagulation bath 163 containing coagulation liquid. When the coating film of the undiluted solution and the coagulating solution come into contact with each other, the coagulating solution diffuses into the coagulating solution, so that the hydrophobic polymer and the hydrophilic polymer cause phase separation and the hydrophobic polymer coagulates. As the phase separation proceeds, the porous film 150 having the three-dimensional network structure in which the hydrophobic polymer and the gelatinous hydrophilic polymer are entangled with each other is formed on the outer peripheral surface of the nailing support by solidification.

In addition, there is no need to form a princess section (dry-wet spinning) or to form a prin- cipal section (wet-spinning) until the coagulation tank containing the coagulating liquid after ejection.

The coagulating solution used herein is a non-solvent for the hydrophobic polymer, and it is necessary to use the hydrophilic polymer every two days. Water, ethanol, methanol or the like or a mixture thereof may be used. Especially, It is preferable from the viewpoint of management.

<Other Processes>

The porous film formed by the above-described coagulation step has a large pore diameter and potentially has high water permeability. However, since a large amount of the hydrophilic polymer in a solution state remains in the porous film, sufficient high water permeability is exhibited in this state It may become difficult to perform the operation. If the hydrophilic polymer is dried in the film, the mechanical strength of the film may be lowered. Therefore, after the coagulation step, a removal step is usually performed to remove the hydrophilic polymer remaining in the porous film, and thereafter, the porous film is further dried.

(Removal process)

In the porous film obtained in the solidification step, the hydrophilic polymer remains in a film (porous portion) in a solution state at a high concentration. Such a high concentration of the hydrophilic polymer is relatively easily removed to some extent by immersing the porous film in the cleaning liquid. Therefore, in the removing step, it is preferable to first clean the porous film with a cleaning liquid at first, then lower the molecular weight of the hydrophilic polymer using an oxidizing agent, and then remove the hydrophilic polymer having a lower molecular weight.

Cleaning of the porous membrane

The cleaning liquid used for cleaning the porous film is not particularly limited as long as it is a liquid in which the hydrophilic polymer is dispersed or dissolved by clearing. However, water is preferable from the viewpoint of high cleaning effect.

Examples of the water to be used include tap water, industrial water, river water, well water and the like, and alcohol, inorganic salt, oxidizing agent, surfactant and the like may be mixed and used. As the cleaning liquid, a mixed liquid of a good solvent for the hydrophobic polymer and water may be used.

Examples of the method for cleaning the porous membrane with a cleaning liquid include a method of immersing the porous membrane in a cleaning liquid, a method of running the porous membrane in a washing tank in which a cleaning liquid is stored, and the like.

The cleaning temperature is preferably at least 50 캜, more preferably at least 80 캜, in order to suppress the viscosity of the solution of the hydrophilic polymer to a low level and to prevent the diffusion moving speed from lowering. Further, if cleaning is carried out while boiling the cleaning liquid, the outer surface of the porous film can be scraped off by bubbling due to boiling, so that efficient cleaning can be achieved.

By the cleaning process of the porous membrane, the hydrophilic polymer remaining in the porous membrane is in a relatively low concentration state. In the case of such a low concentration, in order to obtain a higher cleaning effect, it is preferable to carry out the step of lowering the molecular weight of the hydrophilic polymer using an oxidizing agent.

Further, in the porous film formed by the coagulation step, the solvent used for the stock solution in addition to the hydrophilic polymer remains, but the solvent remaining in the porous film is removed by the cleaning step of the porous film.

Lower molecular weight of the hydrophilic polymer

As a method for lowering the molecular weight of the hydrophilic polymer, it is preferable to first hold the chemical liquid containing the oxidizing agent in the porous film, and then heat the porous film holding the chemical liquid in the vapor phase.

As the oxidizing agent, ozone, hydrogen peroxide, permanganate, dichromate, persulfate or the like can be used, but hypochlorite is particularly preferable from the viewpoints of strong oxidizing power, excellent decomposition ability, excellent handling property and low cost. As the hypochlorite, sodium hypochlorite, calcium hypochlorite and the like can be mentioned, but sodium hypochlorite is particularly preferable.

At this time, the temperature of the chemical liquid is preferably 50 DEG C or lower, more preferably 30 DEG C or lower. If the temperature is higher than 50 占 폚, the oxidative decomposition is promoted during the immersion of the porous film, so that the hydrophilic polymer dropped into the chemical liquid is further oxidized and decomposed to waste the oxidizing agent. On the other hand, if the temperature is excessively low, oxidative decomposition is suppressed, but the cost for controlling the temperature at a low temperature tends to increase as compared with the case where the decomposition is carried out at room temperature. Therefore, from this point of view, the temperature of the chemical liquid is preferably 0 ° C or higher, more preferably 10 ° C or higher.

After the chemical liquid is held in the porous film, the porous film is heated in the vapor phase to oxidatively decompose the hydrophilic polymer. According to the heating in the gas phase, the chemical solution held in the porous film is largely diluted, or the chemical solution is hardly released and dissolved out in the heating medium, and the oxidizing agent in the chemical solution is efficiently used for decomposing the hydrophilic polymer remaining in the porous film Therefore, it is preferable.

As a specific heating method, it is preferable to heat the porous film using a heating fluid under atmospheric pressure. As a heating fluid, it is preferable to use a fluid having a high relative humidity, that is, to perform heating under a humid condition because drying of an oxidizing agent such as hypochlorite is prevented and efficient decomposition treatment is possible. At this time, the relative humidity of the fluid is preferably 80% or more, more preferably 90% or more, and most preferably 100% or less.

The lower limit of the heating temperature is preferably 50 占 폚, more preferably 80 占 폚, because the treatment time can be shortened in the case of performing the continuous treatment. The upper limit of the temperature is preferably 100 占 폚 at atmospheric pressure.

Removal of hydrophilic polymer

As a method of removing the low molecular weight hydrophilic polymer, there is a method of cleaning the porous film with a cleaning liquid under the same conditions as the above-described cleaning process of the porous film.

Further, in the case where the hydrophilic polymer still remains even after removing the low molecular weight hydrophilic polymer, a decompression step for decompressing the outer circumferential side of the porous membrane may be further performed.

The pressure on the outer peripheral side of the porous film becomes lower than that on the inner peripheral side by decompressing the outer peripheral side of the porous film, and the hydrophilic polymer remaining in the porous film moves to the outer peripheral side by the pressure difference. Therefore, the hydrophilic polymer can be more effectively removed.

(Drying step)

After the hydrophilic polymer is removed, the porous film is dried by the drying step and wound up on bobbins or failure.

The drying process is not particularly limited and may be carried out by introducing the porous film into a drying apparatus such as a hot air dryer.

&Lt; Action &gt;

According to the manufacturing method of the porous film in this embodiment, since the knee support is taken out from the storage container in the stopped state, it is not necessary to use a rotating means such as a turntable. Therefore, the knee support can be supplied with a simple mechanism. In addition, since the storage container can be directly placed on the floor, a large number of storage containers can be installed, and the space can be effectively utilized. In addition, even when a plurality of porous films are produced at one time, it is easy to simultaneously supply the number of the linear supports in accordance with the number of the porous films.

In addition, unlike the case of using the journalsupport 12, even if the storage container is taken out without rotating, the journals (the journal supports 110) are used as the support of the porous film, The torsion does not accumulate in the region and the generated torsion moves together with the traveling of the knee, so that the twist is hard to occur, and the twist is hard to be formed.

This is because the tongue torque of the knee (the knee support body 12) is small, while the tongue torque of the knee (the knee support body 110) is large, The supporting body 110 itself can be twisted with a weak force and can maintain its shape and is likely to be stably transported downstream while traveling in a twisted state.

Therefore, the present invention can stably produce a porous film.

Further, according to the present invention, since the storage container is at a standstill when the knurl support is taken out, it can be easily connected to the knurl support housed in the next storage container. In addition, there is no need to worry about the timing of the connection and the time taken for the connection.

Further, in the conventional method in which the supporting member is drawn out by rotating the receiving container, after the supporting member is connected, it is necessary that the receiving containers in which the connected supporting members are housed are placed on the same turntable. Since there is a limit in the number of the storage containers that can be placed on the turntable, when the extraction of the hollow cylinder progresses and the hollow cylinder on the turntable becomes smaller, the rotation is stopped again. And the container was placed on the turntable. In this case, it was necessary to repeat the operation as described above, which resulted in troublesome work.

However, according to the present invention, it is possible to arrange a plurality of storage containers in which the nourishment support is housed in advance in predetermined places, and the nourishment support housed in these storage containers can be connected at a time. After all the knee scraper supports have been drawn out from the arbitrary storage container, the storage container can be removed as needed, and the next storage container can be moved away from the place where the arbitrary storage container is placed.

Next, an example of a method for manufacturing a porous hollow fiber membrane using the above-described one-way feeding device 210 will be described.

11, the knee support 110 stored in the storage container 120 is taken out from the storage container 212 to the guide member 214 formed on the storage container 212 as described above do. At this time, since the guide member 214 is formed, the knee supporter 110 is restrained from being entangled by being caught by the eastern portion of the storage container 120 or the stem 121.

It is preferable to draw out the knee support 110 in a state in which the storage container 120 is stopped, since the facility can be made simpler and the space can be effectively used.

Further, the nourishing supporter 110 is drawn out from the housing terminating end when it is accommodated in the accommodating container 120.

The nailing support 110 drawn out from the storage container 120 is supplied to the spinning nozzle 220.

Further, the line support 110 housed in the storage container 120 is of finite length. In order to continuously supply the nourishing supporter 110 to the spinning nozzle 220, the respective nourle supporters 110 housed in the plurality of accommodating containers 120 may be connected and used.

The method, apparatus, and the like described above with reference to Figs. 6, 7, 8A, and 8B described above are used for the connection method of each of the ninth support bodies, the connection apparatus used for the connection, same.

11, the spinneret 220 is radiated so as to apply the film forming stock solution 25 to the outside of the supplied knee support 110 and immersed in the coagulating liquid 230b contained in the coagulating bath 230a .

As a result, the raw film-forming liquid 25 solidifies and a porous hollow fiber membrane 26 is formed. Thereafter, the porous hollow fiber membrane 26 is obtained by washing, drying, and the like.

As the film-forming raw liquid 25, a film-forming stock solution containing a film-forming resin, a pore-forming agent and a solvent is used. When this stock solution is immersed in the coagulating solution, the coagulating solution diffuses into the film forming solution, and the film-forming resin and the pore-forming agent each undergo phase separation to solidify, and a porous film layer is formed on the outer side of the kneading support.

As the film-forming resin, a conventional resin used for forming a porous film can be used, and examples thereof include a polysulfone resin, a polyethersulfone resin, a sulfonated polysulfone resin, a polyvinylidene fluoride resin, a polyacrylonitrile resin , A polyimide resin, a polyamideimide resin, and a polyesterimide resin. These resins can be appropriately selected and used according to need, and polyvinylidene fluoride resins are preferable because of their excellent chemical resistance.

The film-forming resin may be used alone or in combination of two or more.

As the pore-forming agent, for example, hydrophilic polymer resins such as mono-oleic, diol, triol, and polyvinylpyrrolidone represented by polyethylene glycol can be used. These can be appropriately selected and used according to need, and polyvinylpyrrolidone is preferable from the viewpoint of the excellent thickening effect.

One type of agent may be used singly or two or more types may be used in combination.

The solvent is not particularly limited as long as it can dissolve both the film-forming resin and the pore-forming agent, and for example, dimethylsulfoxide, N, N-dimethylacetamide, and dimethylformamide can be used. Of these, N, N-dimethylacetamide is preferable in that the dissolution of the film-forming resin into a solvent can be performed more efficiently.

One solvent may be used alone, or two or more solvents may be used in combination.

Further, resins and additives other than the pore-forming agent may also be used as the optional ingredients in the film-forming stock solution 25 within the range not inhibiting the control of phase separation.

The content of the film-forming resin in the coating liquid 25 (100 mass%) is preferably 10 mass% or more, more preferably 15 mass% or more, % Or more is more preferable. The content of the film-forming resin is preferably 30 mass% or less, more preferably 25 mass% or less, for the same reason.

The content of the pitching agent in the coating liquid 25 (100 mass%) is preferably 1% by mass or more, more preferably 5% by mass or more, from the viewpoint of facilitating the formation of the porous film. In addition, the content of the openable agent is preferably 20% by mass or less, and more preferably 12% by mass or less, from the viewpoint of handling property of the stock solution.

Conventionally, when the guide member is not formed on the housing container and the guide member that is pulled out from the housing container is pulled up obliquely, when the guide member is caught on the eastern portion or the stem of the housing container, And there is a case where the knee support is entangled.

On the contrary, in the line feeder of the present invention, the guide member is formed on the storage container and the slide support is pulled out from the storage container toward the guide member, so that the slide support is caught by the body of the storage container, Entanglement is suppressed. Therefore, excellent process stability can be obtained in the production of the porous hollow fiber membrane.

In addition, the present invention is not limited to the above-described one-way feeding device 210. For example, it may be a one-piece feeding device having a storage container without a mandrel.

[Second Embodiment]

Next, a second embodiment of a method for producing a porous film of the present invention will be described in detail with reference to the drawings.

The method for producing a porous film of the present invention according to the second embodiment is different from the first embodiment described above in that a bobbin is used as a winding hole. The rest of the configuration is the same as that of the first embodiment, and a description thereof will be omitted.

(A method of winding the knee support on the bobbin)

An example of a method of winding a knee support on a bobbin will be described with reference to Figs. 12A and 12B.

12A is a schematic structural view showing an example of a winding device used when winding a knurled support on a bobbin. The winding device 180a of this example includes a bobbin 170 wound around the kneading support 110, a bobbin fixing jig 181 for rotatably supporting the bobbin 170, And a supply guide 182 for guiding the supply of ink.

The bobbin 170 is constituted by a cylindrical winding portion 171 on which the knitted fabric support 110 is wound and flange portions 172 and 173 detachably attached to both ends of the winding portion 171.

The diameter of the winding portion 171 is appropriately selected according to the winding amount of the nailing supporting member 110, the drawing form of the nailing supporting member, and the like.

A supporting shaft 181a extending horizontally is mounted on the bobbin holding jig 181 and the bobbin 170 is inserted into the supporting shaft 181a. By rotating the support shaft 181a, the bobbin 170 is also rotatable.

The supply guide 182 is not particularly limited as long as it can reciprocate in the direction of the central axis of the bobbin 170 and supply the knobby support 110 to the bobbin 170.

The winding support 110 is wound around the winding portion 171 of the bobbin 170 which rotates via the supply guide 182 reciprocating in the direction of the central axis of the bobbin 170 using the winding device 180a And is wound around the bobbin 170 while being supplied at a constant speed. The winding method is not particularly limited, and examples thereof include a parallel winding, a diagonal winding, and a polar winding in which the winding width of the nylon support is reduced along with the winding number.

It is preferable that the end of the knitted fabric support 110 (winding start end) is not wound around the winding portion 171 of the bobbin 170 when starting the winding of the knitted fabric support 110 onto the bobbin 170 Do. When the starting end comes out from the bobbin 170, it is easy to connect the lane supporting member housed in the next bobbin in the connection of the later-described supporting member.

(Drawing Method of Lined Support from Bobbin)

An example of a method of pulling out the knee support 110 wound on the bobbin 170 from the bobbin 170 as described above will be described with reference to Fig.

In this embodiment, the bobbin 170 is pulled out from the bobbin 170 in the direction of the winding axis, that is, the central axis of the bobbin 170, while the bobbin 170 is stopped. Specifically, as shown in Fig. 10, the bobbin 170 is folded down on one side of the flange portion 172 of the bobbin 170 so that the central axis direction of the bobbin 170 is vertical, . It is preferable to pull out the knee support 110 in the vertical direction upward.

Further, when the knee support 110 is taken out, the other flange portion of the bobbin 170 is separated from the winding portion 171.

In addition, the knee support 110 is pulled out from the winding end (winding end end) to the bobbin 170.

13, the knee supporter 110 wound on the bobbin 170 on the bobbin 170 on the approximately extended line of the bobbin 170 in the direction above the bobbin 170, that is, in the direction in which the kneading supporter 110 is pulled out, A drawing guide 124 for fixing the position of the kneading supporter 110 in the horizontal direction is mounted at a position spaced from the bobbin 170 by a factor of several to several tens of times the diameter of the roll of the kneading support 110, And the knee support 110 is pulled out. When the draw-out guide 124 is attached, the speed at which the loop support 110 is drawn out and the resistance at which the loops are loosened are likely to be stabilized when the loops of the knobby supporter 110 stored in the bobbin 170 are loosened.

(Connection Method of Lane Support)

The knitted fabric support 110 taken out from the bobbin 170 is supplied to the following solidification step.

Since the knee support 110 wound on the bobbin 170 has a finite length, in order to continuously draw the kneader support 110 and supply it to the coagulation process, the respective knee supporters wound around the bobbins are connected and used .

More specifically, as shown in Fig. 13, a winding start of the knee support 110a wound on any of the bobbins 170 (170a) is started so that the respective knee supporters 110 wound around the bobbins 170 are connected The winding end b12 of the knitted fabric support 110b wound around the bobbin 170b is connected to the winding start end b11 of the knee support 110b wound on the bobbin 170b, And the winding end c12 of the knob supporter 110c wound on the bobbin 170c next to the bobbin 170c.

When the respective knee supporters 110 wound on the plurality of bobbins 170 are connected as described above, all the knee supporters 110a are pulled out from any of the bobbins 170a and then the knee supporters 110b The knee support 110c is pulled out from the next bobbin 170c after the knee support 110b is pulled out.

The connection method of the nylon supporter includes the connection method described in the first embodiment. Particularly, a method of connecting by ultrasonic wave of (1) is preferable.

&Lt; Action &gt;

According to the production method of the porous film in this embodiment, since the knee support is taken out from the bobbin in a stopped state, it is not necessary to use a jig (rotation means) for rotating the bobbin.

Therefore, the knee support can be supplied with a simple mechanism.

Further, according to the present invention, since the bobbin is in a stopped state at the time of pulling out the knee supporter, the production of the porous film is not stopped, and it can be easily connected to the knee supporter wound on the next bobbin. In addition, there is no need to worry about the timing of the connection and the time taken for the connection.

<Other Embodiments>

In the second embodiment, winding of the knitted fabric support on the bobbin is not limited to the above-described method. In the method using the winding device 180a shown in Fig. 12A, the knee supporter 110 is wound around the bobbin 170 in the direction of the central axis, but the winding device 180b shown in Fig. 9 (b) The knee supporter 110 may be wound in the following manner with the central axis direction of the bobbin 170 being vertical.

The winding device 180b shown in Figure 12B includes a bobbin 170 and a supply guide 182 for supplying the bobbin 170 with the bobbin 170 and a supply guide 182 for supplying the bobbin 170 along the bobbin 170 And a guide fixing jig 183 for rotatably supporting the bobbin 170 so as to be reciprocally movable in the direction of the center axis of the bobbin 170.

The bobbin 170 is wound around the flange portion 170 of the bobbin 170 so that the central axis direction of the bobbin 170 is perpendicular to the bobbin 170, The bobbin 170 is placed on a floor, a pedestal, or the like. At this time, the other flange portion of the bobbin 170 is separated from the winding portion 171. Thereafter, via the supply guide 182 which is rotated along the circumference of the bobbin 170 by the bobbin fixing jig 181 and also reciprocally moved in the direction of the central axis of the bobbin 170, And is wound on the bobbin 170 while being fed to the winding portion 171 of the bobbin 170 at a constant speed.

The drawing of the knee support from the bobbin is not limited to the above-described method. In the method shown in Fig. 13, the bobbin 170 is provided on a floor or a pedestal. However, for example, as shown in Fig. 14, a bobbin fixture 190 equipped with a plurality of branch portions 191 is used , The bobbin 170 (170a, 170b, ...) may be inserted into the branch portion 191 and the knee support 110 may be pulled out in the direction of the central axis of the bobbin 170. [ When connecting the knitted fabric support 110 wound around the plurality of bobbins 170a to 170b, the winding start end a11 of the knitted fabric support 110a wound on an arbitrary bobbin 170a, It is preferable to connect the winding end b12 of the knitted fabric support 110b wound on the next bobbin 170b located below the bobbin 170a.

Example

Hereinafter, the present invention will be described concretely with reference to Examples, but the present invention is not limited thereto.

[Example A1-1]

&Lt; Production apparatus for porous film &

A porous film production apparatus 1100 shown in Fig. 15 was used as a production apparatus for the porous film.

This porous film producing apparatus 1100 is a device for manufacturing a porous film layer 1100 by applying a spinning solution for forming a film to a winding support 110 wound with a line support 110 and a liner support 110 taken out from the storage container 120, Removing means 1110 for removing the hydrophilic polymer from the porous membrane 150 formed of the nailing support and the porous membrane layer and the porous membrane 150 formed by removing the hydrophilic polymer from the porous membrane 150. [ A drying means 1120, and a winding means 1130 for winding the dried porous film 150.

A dancer mechanism 1140 for passing the kneading supporter 110 through the spinning nozzle 161 of the porous film layer forming apparatus 160 with a predetermined tension is provided between the storage container 120 and the porous film layer forming device 160 ). Between the porous film layer forming apparatus 160 and the removing means 1110 is provided a film forming roll (not shown) for pulling the porous film 150 from the porous film layer forming apparatus 160 at a constant speed, 1150).

&Lt; Storage of the nylon support &gt;

(Lane support)

Polyester fiber (fineness: 420 dtex, number of filaments: 180) was turned into a circular support by a circular knitting machine and continuously taken out at a speed of about 3 m / min into a metal dice heated to 200 ° C, (Outer diameter: about 2.5 mm, hollow diameter: about 1.5 mm, number of corners per one circumference: 12) having improved properties, dimensional stability and mechanical properties were used.

The torsional withdrawal stability X of the draft was 1.9 (g · cm).

(Storage container)

As the storage container 120, a cylindrical paper drum (drum inner diameter: 450 mm, depth: 800 mm) made of paper (paper) was used. In the drum, a mandrel 121 (outer diameter: 130 mm, height of 770 mm from the bottom of the drum) is formed at the center.

(Storage method)

The knee support 110 was supplied to the storage container 120 provided on the turntable 131 under the condition of a feed rate of 3 m / min using the storage device 130 shown in Fig. 5, while the turntable 131 is rotated once for about 30 seconds, the rotation speed during one rotation is changed periodically so that the knee supporter 110 is rotated in the loop shape So that the arrangement traces surround the mandrel 121 and the adjacent loops are shifted in the direction of the circumference of the rotation axis of the storage container 120 so as to draw the placement locus of the storage container 120, The support 110 was stacked and housed.

The end of the nourishing supporter 110 is pulled out to the outside of the accommodating container 120 when starting to store the nourishing supporter 110 into the accommodating container 120. [

&Lt; Preparation of undiluted solution &gt;

, 12 parts by mass of polyvinylidene fluoride A (manufactured by Atofina Japan, trade name Kana 301F), 8 parts by mass of polyvinylidene fluoride B (manufactured by Atopina Japan, trade name Kana 9000 LD), polyvinylpyrrolidone , 10 parts by mass of K-90) and 70 parts by mass of N, N-dimethylacetamide (DMAc) were mixed to prepare a film-forming stock solution (1).

Separately, 3 parts by mass of polyvinylidene fluoride A, 2 parts by mass of polyvinylidene fluoride B, 2 parts by mass of polyvinylpyrrolidone, and 93 parts by mass of DMAc were mixed to prepare a film-forming stock solution (2) did.

&Lt; Preparation of porous film &

Using the porous film production apparatus 1100 shown in Fig. 15, a porous film was produced as follows.

The knitted supporter 110 is retracted from the accommodating container 120 in the vertical direction in the condition of the withdrawal speed of 10 m / min while the axial direction of the accommodating container 120 in which the kneaded supporter 110 is housed is stopped in the vertical direction The navel supporter 110 is pulled upward. The drawn napkin support 110 passes through a ring-shaped withdrawing guide 124 provided above the accommodating container 120 and is changed in direction by the rotation guide 125 and is fed by a support roll 126 And supplied to the dancer mechanism 1140 while adjusting the running speed.

The tension of the nail support is adjusted by the dancer mechanism 1140 so that the nail support 110 can pass through the spinning nozzle 161 of the porous film layer forming device 160 with a predetermined tension, Was supplied to the porous film layer forming apparatus 160.

Next, as the spinning nozzle 161, a hollow portion (channel) is formed at the center, and a nozzle having a ring-shaped discharge port sequentially formed on the outer side thereof so as to sequentially apply two kinds of liquids (Japanese Patent Laid- -42074) was prepared, and the knee support was introduced into the hollow portion while keeping it at 30 ° C. At the same time, the undiluted film forming solutions 1 and 2 are supplied from the undiluted solution supplying means 162 to the spinning nozzle 161, and the undiluted film forming solution 2 and the undiluted film forming solution 1 And coagulated in a coagulation bath 163 containing a coagulating liquid (a mixture of 5 parts by mass of N, N-dimethylacetamide and 95 parts by mass of water) kept at 80 占 폚. Thus, as shown in Fig. 7, a porous film layer 151 having a single layer of the fractionation layer near the outer surface and having a tapered structure in which the diameter of the pore increases toward the inside is formed on the porous film 150). The main stock solution for forming the film structure of the porous film among the coated stock solutions (1) and (2) is the stock film stock solution 1 applied on the outside.

Then, the porous film 150 was pulled at a constant speed by the film-forming roll 1150, and the hydrophilic polymer was removed by the removing means 1110. Specifically, first, the porous film 150 was washed for 3 minutes in hot water at 98 占 폚, and part of the residual DMAc and polyvinylpyrrolidone was removed. Thereafter, the porous film 150 is immersed in an aqueous sodium hypochlorite solution of 50000 mg / L, the porous film 150 is heated in a steam bath at 90 ° C for 2 minutes, Deg.] C for 3 minutes, and the remaining polyvinylpyrrolidone was removed to a content of less than 2% by mass with respect to the porous film layer.

Then, the porous film 150 was heated at 85 캜 for 10 minutes by a drying means 1120, and then wound on a bobbin by a winding means 1130.

In Embodiment A1-1, no kinked portion is formed on the knee support 110 even after 6 hours have elapsed from the start of withdrawal of the knee support 110 from the storage container 120, I was able to withdraw.

[Example A1-2]

A porous film was produced in the same manner as in Example A1-1 except that the drawing speed at the time of pulling out the laid carrier 110 from the storage container 120 was changed to 20 m / min. As a result, even after elapse of 6 hours from the start of withdrawal of the knee support 110 from the storage container 120, the knee supporter 110 could be pulled out of the storage container 120 stably without forming a kink .

[Example A1-3]

A porous film was produced in the same manner as in Example A1-1 except that the drawing speed at the time of pulling out the knurled support 110 from the storage container 120 was changed to 50 m / min. As a result, even after elapse of 6 hours from the start of withdrawal of the knee support 110 from the storage container 120, the knee supporter 110 could be pulled out of the storage container 120 stably without forming a kink .

[Example A2-1]

A bobbin is used in place of the storage container 120 as a winder and the winder 180a shown in Figure 12A is used to pass the supply guide 182 reciprocating in the direction of the center axis of the bobbin 170, The supporting body 110 was wound on the bobbin 170 while being fed at a constant speed to the winding portion 171 (outer diameter: 190 mm) of the rotating bobbin 170. The winding start end of the knitted fabric support 110 is not wound around the winding portion 171 of the bobbin 170 when starting the winding of the knitted fabric support 110 onto the bobbin 170. [

A porous film was produced in the same manner as in Example A1-1 except that the kneaded supporter 110 was pulled out from the bobbin 170 wrapped around the kneading supporter 110 under the condition of a draw speed of 15 m / min.

As a result, even after elapse of 6 hours from the start of withdrawing the knee support 110 from the bobbin 170, the knee support 110 could be pulled out of the bobbin 170 stably without forming a twist.

[Example A2-2]

A porous film was produced in the same manner as in Example A2-1 except that the drawing speed at the time of drawing the knurled support 110 from the bobbin 170 was changed to 30 m / min.

As a result, even after elapse of 6 hours from the start of withdrawing the knee support 110 from the bobbin 170, the knee support 110 could be pulled out of the bobbin 170 stably without forming a twist.

[Example A3-1]

In the same manner as in Example A1-1, two storage containers 120 in which the kneaded supporter 110 was housed were prepared. The winding start end of the lane support 110 housed in one storage container and the winding end of the lane support 110 housed in the other storage container were connected by ultrasonic waves.

In the same manner as in Example A1-1 except that the knee support 110 was continuously drawn out from the two storage containers 120 connected to the knee support 110 in the manner described above under the condition of a draw speed of 30 m / To prepare a porous film.

As a result, even after twelve hours have elapsed since the start of drawing out the knee support 110 from the storage container 120, the knot supporter 110 can be taken out of the storage container 120 stably without forming a kink .

[Example A3-2]

Two bobbins 170 wound with the kneading supporter 110 were prepared in the same manner as in Example A2-1. The winding start end of the linear knitting supporter 110 wound on one bobbin and the winding end end of the linear knitting supporter 110 wound on the other bobbin were connected by ultrasonic waves.

In the same manner as in Example A1-1, except that the two pieces of bobbins 170 connected with the nylon supporter 110 were continuously drawn out at a drawing speed of 30 m / min, Membrane.

As a result, even after twelve hours have elapsed since the start of drawing out the knee support 110 from the bobbin 170, the knee support 110 could be pulled out of the bobbin 170 stably without forming a twist.

[Example B1]

Using the one-way feeding device 210 shown in Fig. 11, a porous hollow fiber membrane was produced as follows.

As the storage container 120, a cylindrical paper drum (drum inner diameter: 450 mm, depth: 900 mm) was used. A stem 121 (outer diameter: 130 mm, height 880 mm from the bottom 122 of the drum) is formed in the drum.

As the guide member 214, a guide roll (made of polyethylene, roller groove diameter 80 mm, outer diameter 100 mm) was used. The height of the guide member 214 from the bottom 122 of the storage container 120 is 2.8 m. The straight line m connecting the guide member 214 to the lower corner 212d farthest from the guide member 214 in the storage container 120 is defined as a straight line m, The angle? Formed by the bottom 122 of the base plate 120 is set to 80 degrees.

As the kneading support 110, a kneading machine (trade name: M1205, manufactured by Mitsubishi Rayon Co., Ltd.) was used.

29.7 kg of polyvinylidene fluoride PVDF301F manufactured by ARKEMASA, a film-forming resin, and 15.6 kg of polyvinylpyrrolidone PVP-K79 manufactured by Nippon Catalysts Co., Ltd. as a solvent for forming the film-forming solution 25 were dissolved in N, N -Dimethylacetamide (DMAc, manufactured by Samsung Fine Chemical Co., Ltd.) in 112.2 L, and defoaming was used.

The knee support 110 is fed under the condition that the feeding speed is 3 m / min while the rotation speed during one rotation is periodically changed while the storage container 120 is placed on the turntable and rotated one turn at about 13 seconds. As shown in Fig. 7A, the loop support 110 is formed so as to draw the loop locus locating locus, and the locus of locating the locus locator 121 surrounds the axle 121 so that the adjacent loop is shifted in the direction about the rotation axis of the accommodating container 120 , And the noodle supporter 110 was stacked from the bottom 122 of the storage container 120 toward the upper portion 212c.

In order to start storing the folding support 110 into the storage container 120, the storage start end of the folding support 110 is taken out of the storage container 120.

The kneading supporter 110 is pulled out from the storage container 120 in a stopped state toward the guide member 214 at a drawing speed of 20 m per minute and the tension is applied by the tension applying means 216 to the spinneret 220 And the spinning stock solution 25 was coagulated in a coagulating solution 230b (8% aqueous solution of DMAc) kept at 80 DEG C to coagulate the porous hollow fiber membrane .

Further, the porous hollow fiber membrane was obtained by washing with a washing liquid (hot water at 90 占 폚), removing the pore-forming agent by hypochlorite, and drying.

In the production of the porous hollow fiber membrane in Example B1, entanglement did not occur in the kneading support 110 fed to the spinning nozzle 220 by the kneading feeder 210, and excellent process stability was obtained.

[Comparative Example 1]

(Outer diameter: about 2.2 mm, hollow diameter: about 1.0 mm) knitted by joining 16 polyester fibers (fineness: 830 dtex, number of filaments: 96) instead of the nylon supporter , A porous film was produced in the same manner as in Example A1-1.

The torsional withdrawal stability X of the nozzle support was 14.7 (g · cm).

As a result, the withdrawal speed of the journals starts to change after about five minutes from the start of withdrawal of the journals from the storage container 120, and weak jinks are formed in the journals drawn out from the storage container 120 . After a lapse of about 10 minutes, a twist occurs, and the twist is reached in the withdrawing guide 124 provided above the storage container 120. The knot portion is hooked on the drawing guide 124 and the arm of the drawing guide 124 is deformed and the driving motor (not shown) of the supporting member feeding roll 126 is moved to the overload ).

The journals are wrapped around the mandrel 121 of the storage container 120 after about 15 minutes from the start of withdrawing the journals from the storage container 120 as a result of attempting to take out the journals again, The operation of the porous film production apparatus 1100 was stopped urgently because the container 120 started to be pulled up.

Industrial availability

The method of the present invention for taking out a knee, even when continuously withdrawing the knee scaffold, is capable of supplying a support with a simple mechanism while effectively utilizing space while suppressing the occurrence of kinks. .

110, 110a, 110b, 110c:
120, 120a, 120b, 120c: storage container
121: mandrel
150: Porous film
151: Porous film layer
170, 170a, 170b, 170c:
a11, b11: winding start end
b12, c12: end of winding
111: Room
112: loop
113: mesh
25: Undiluted solution
26: Porous hollow fiber membrane
210: One-way feeder
214, 218: guide member
216: tension applying means
216a, 216b:
161, 220: Spinning nozzle
230a: Coagulation bath
230b: High amount

Claims (5)

A method for drawing a knee from a knee joint in which a knee is wound,
Withdrawing the knitted fabric from the winding opening in a state in which the winding opening is stopped,
Wherein the above-mentioned maneuver has a torsionally withdrawal static X defined below as 14 g · cm or less.
Torsion restoration ratio A: (ratio of the number of torsions loosened five times in a state in which 30 g of weight is attached to the lower side of the 30 cm long knee and the knee is twisted five times in the vertical direction)
Torsion torque B: (When a 30-gauge weight is attached to the bottom of a 30-cm-long manneuver and twisted five times in the vertical direction, the load acting on the knee in the direction opposite to the lace direction g) × Distance from the center of string of maneuver to load measurement point (cm) = torsion torque (g · cm)
Torsion withdrawal inertia X = torsion recovery rate A x torsion torque B (g · cm) delete There is provided a process for producing a porous film, which comprises the steps of drawing a hollow nailing support from a take-up port, applying the undiluted solution to the outer circumferential surface of the nailing support and solidifying to form a porous membrane layer on the outer circumferential surface of the nailing support,
In a state where the winding-up port is stopped,
The knee support is taken out from the knee joint in which the knee is wound,
Wherein the hollow nappy support has a torsion pulling backrest X defined below as being 14 g · cm or less.
Torsion restoration ratio A: The ratio of the number of torsions loosely twisted five times in a state in which 30 g of weight is attached to the bottom of the 30 cm long knee,
Torsion torque B: (When a 30-gauge weight is attached to the bottom of a 30-cm-long manneuver and twisted five times in the vertical direction, the load acting on the knee in the direction opposite to the lace direction g) × Distance from the center of string of maneuver to load measurement point (cm) = torsion torque (g · cm)
Torsion withdrawal inertia X = torsion recovery rate A x torsion torque B (g · cm) delete delete

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