WO2013047437A1 - 乾湿式紡糸装置及び合成繊維の製造方法 - Google Patents
乾湿式紡糸装置及び合成繊維の製造方法 Download PDFInfo
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- WO2013047437A1 WO2013047437A1 PCT/JP2012/074392 JP2012074392W WO2013047437A1 WO 2013047437 A1 WO2013047437 A1 WO 2013047437A1 JP 2012074392 W JP2012074392 W JP 2012074392W WO 2013047437 A1 WO2013047437 A1 WO 2013047437A1
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- wet spinning
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F11/00—Chemical after-treatment of artificial filaments or the like during manufacture
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/04—Dry spinning methods
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D5/00—Formation of filaments, threads, or the like
- D01D5/06—Wet spinning methods
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- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
- D01F9/00—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments
- D01F9/08—Artificial filaments or the like of other substances; Manufacture thereof; Apparatus specially adapted for the manufacture of carbon filaments of inorganic material
- D01F9/12—Carbon filaments; Apparatus specially adapted for the manufacture thereof
- D01F9/14—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments
- D01F9/20—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products
- D01F9/21—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D01F9/22—Carbon filaments; Apparatus specially adapted for the manufacture thereof by decomposition of organic filaments from polyaddition, polycondensation or polymerisation products from macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds from polyacrylonitriles
Definitions
- the present invention relates to a dry / wet spinning apparatus and a synthetic fiber production method using the dry / wet spinning apparatus, and more particularly to a dry / wet spinning apparatus suitable for producing an acrylic precursor fiber bundle for producing carbon fibers. Is.
- the polymer solution (spinning stock solution) is once discharged into the gas phase part (usually in the air) from the spinning hole of the die, and then the fiber is introduced into the coagulation bath. It is allowed to coagulate and then the coagulated fibers are taken from the coagulation bath to form a fiber bundle.
- the fiber draft generated by the fiber take-up is concentrated in the gas phase portion, so that the fiber can be solidified and gelled under low tension in the coagulation bath. Thereby, the fiber bundle excellent in the drawability in a post process can be obtained.
- the dry and wet spinning method a fiber bundle composed of single fibers having excellent density can be obtained.
- the traveling speed of the fiber bundle passing through the coagulation bath is increased, so that the flow rate of the coagulating liquid flowing along with the traveling of the fiber bundle is increased. Due to this increase in the accompanying flow, the flow rate of the coagulating liquid in the coagulating bath further increases, the liquid level of the coagulating liquid rises, and a phenomenon in which vortex is sometimes generated occurs. When this phenomenon occurs, the liquid level fluctuation of the coagulation liquid just below the base increases. The liquid level fluctuation of the coagulation liquid causes disorder of the arrangement of single fibers in the fiber bundle and breakage of single fibers. When the fluctuation of the liquid level of the coagulating liquid is significant, a part or all of the surface on which the spinning holes of the die are arranged (the die surface) may come into contact with the coagulating liquid, making it impossible to perform dry and wet spinning.
- Patent Document 1 discloses a device in which a rectifying cylinder is installed so as to surround the traveling yarn. At the same time, the upper end of the rectifying cylinder is defined to be exposed above the liquid level.
- Patent Document 2 discloses a rectifying plate or a wave preventing plate made of a perforated plate is disposed between the base and the coagulation bath wall opposite to the take-up direction of the spun yarn, or A plurality of sheets are arranged vertically between the base and the guide on the take-up side of the coagulation bath. Also in this case, as in Patent Document 1, the upper end portion of the rectifying plate or the anti-ripple plate is exposed on the coagulation bath liquid surface.
- Patent Document 3 proposes a method in which a ball is floated on the coagulation bath liquid level below the outer periphery of the spinneret to control the undulation of the coagulation bath liquid level. Further, in Japanese Patent Application Laid-Open No. 2007-291594 (Patent Document 4), the yarn travels downward in a coagulation bath through a funnel-shaped rectifying plate, is folded by a direction changing guide, and is guided to the take-up side guide. A method has been proposed in which a partition plate is installed in a coagulation bath along a strip, with a spacing of 20 to 200 mm from the yarn.
- the object of the present invention is to suppress the fluctuation of the coagulating liquid surface, and the yarn spun downward from the base without the liquid surface coming into contact with the spinning surface of the base. Dry and wet, especially suitable for the production of acrylic precursor fiber bundles for the production of carbon fibers, making the solidification property of the yarns uniform and stable spinning difficult. It is to provide a spinning device.
- the dry-wet spinning device of the present invention is a dry-wet spinning device having a die and a coagulation bath, and surrounds all or part of the periphery of the yarn spun downward from the die and is disposed in the coagulation bath.
- a horizontal rectifying plate made of a plate is provided.
- the horizontal rectifying plate is composed of one or a plurality of plates, and has an opening through which the yarn passes at the center, and the horizontal rectifying plate allows 50% or more of the circumference of the yarn The range of is enclosed.
- the opening can be communicated with the outside of the lateral rectifying plate by providing a communicating portion on the lateral rectifying plate, and each of the openings formed by the communicating portion is an outer peripheral portion of the opening. Of 20% or less.
- an angle formed by the surface of the horizontal rectifying plate and the horizontal surface in a direction outside the coagulation bath is 75 degrees or less. It is preferable that the width of the horizontal rectifying plate in the vertical direction with respect to the central axis of the yarn transferred downward is 5 mm or more. It is preferable that a part or all of the horizontal rectifying plate extends to the wall surface of the coagulation bath. Moreover, it is preferable that the end part close to a thread
- the opening ratio is preferably 5% or more and 95% or less, and the hole diameter is 0.5 mm or more and 50 mm or less.
- the horizontal rectifying plate may be a wire mesh, and the size of the mesh at that time is preferably 2 mesh or more and 800 mesh or less.
- a part or all of the outer peripheral portion of the horizontal rectifying plate made of the plate has a vertical rectifying plate made of a plate extending upward to the liquid level, or a part of the outer peripheral portion of the horizontal rectifying plate made of the plate or All of them may have a vertical rectifying plate made of a plate extending upward to the liquid level and extending downward to the liquid level.
- the vertical rectifying plate may be a perforated plate. In this case, it is preferable that the vertical rectifying plate is a punching metal, the aperture ratio is 5 to 95%, and the hole diameter is 0.5 mm to 50 mm.
- the longitudinal rectifying plate may be a wire mesh. In this case, the size of the mesh is preferably 2 mesh or more and 800 mesh or less.
- a horizontal rectifying plate made of the plate or a vertical rectifying plate extending in the vertical direction may be attached and detached.
- the synthetic fiber production method of the present invention is a synthetic fiber production method in which a synthetic fiber is spun using the dry-wet spinning apparatus.
- the present invention effectively suppresses fluctuations in the coagulation liquid surface and turbulence in the coagulation liquid flow caused by the rebounding flow that flows back to the coagulation liquid surface when the accompanying flow caused by the running of the yarn rebounds and stabilizes spinning. enable.
- FIG. 4 is a schematic plan view of the embodiment shown in FIG. 3. It is a top view which shows roughly an example of the further embodiment of this invention. It is a top view which shows roughly an example of the further embodiment of this invention. It is a top view which shows roughly an example of the further embodiment of this invention. It is a sectional side view which shows an example of further another embodiment of this invention roughly. It is a schematic plan view of embodiment shown in FIG. It is a sectional side view which shows an example of further another embodiment of this invention roughly.
- FIG. 15 is a schematic plan view of the embodiment shown in FIG. 14. It is a sectional side view which shows an example of further another embodiment of this invention roughly.
- FIG. 17 is a schematic plan view of the embodiment shown in FIG. 16. It is a sectional side view which shows an example of further another embodiment of this invention roughly. It is a schematic plan view of embodiment shown in FIG. It is a sectional side view which shows an example of further another embodiment of this invention roughly.
- FIG. 21 is a schematic plan view of the embodiment shown in FIG. 20. It is a sectional side view which shows an example of the conventional dry-wet spinning apparatus roughly. It is a schematic plan view of the conventional apparatus shown in FIG. It is a sectional side view which shows roughly the other example of the conventional dry-wet spinning apparatus. It is a schematic plan view of the conventional apparatus shown in FIG. It is a schematic plan view which shows the comparative example of this invention. It is a sectional side view which shows an example of further another embodiment of this invention roughly. It is a sectional side view which shows an example of further another embodiment of this invention roughly. It is a sectional side view which shows an example of the comparative example of this invention roughly.
- FIG. 1 shows an embodiment of a dry-wet spinning apparatus according to the present invention, in which reference numeral 1 denotes a spout gold, 2 denotes a spun yarn, 3 denotes a direction change guide in a coagulation bath, 4 denotes A take-up side guide, 5 is a coagulation bath, 6 is a coagulation outflow receiving tank, 7 is a circulation pump, 8 is a horizontal flow straightening plate, and 8a is an opening.
- reference numeral 1 denotes a spout gold
- 2 denotes a spun yarn
- 3 denotes a direction change guide in a coagulation bath
- 4 denotes A take-up side guide
- 5 is a coagulation bath
- 6 is a coagulation outflow receiving tank
- 7 is a circulation pump
- 8 is a horizontal flow straightening plate
- 8a is an opening.
- FIGS. 1 to 4 have the simplest configuration of the present invention.
- a yarn comprising a plurality of bundles of filaments spun from the spout gold 1 is used.
- 2 travels downward in the coagulation bath, changes its travel direction by the direction changing guide 3 disposed near the bottom surface of the coagulation bath 5, and is located at the position farthest from the spinning outlet 1 of the coagulation bath 5.
- the vehicle travels obliquely toward the take-up guide 4 disposed above the liquid level near the upper end of a certain side wall, and is horizontally taken to the next process through the take-up guide 4.
- the horizontal rectifying plate 8 having the opening 8a so as to surround the running direction of the yarn 2 spun from the spinning spout 1 in the coagulation bath is disposed horizontally.
- the lateral rectifying plate 8 in the present invention is a perforated plate or a perforated plate that is disposed so as to surround the spun yarn 2 on a cross section that is substantially perpendicular to the spinning direction of the yarn 2 and that has a running surface of the yarn 2 opened. It consists of a plate of holes.
- the shape of the opening 8a may be a circular cross section as shown in FIG. 2 or a polygonal cross section.
- the horizontal rectifying plate 8 is one of the most characteristic constituent members of the present invention.
- the lateral rectifying plate 8 is supported and fixed in a coagulation bath by a support member (not shown). Therefore, there is no special baffle member between the outer peripheral part of the horizontal rectifying plate 8 and the inner wall surface of the coagulation bath 5, and the coagulating liquid is provided between the outer peripheral part of the horizontal rectifying plate 8 and the inner wall surface of the coagulating bath 5. Circulate freely.
- the outer peripheral portion of the horizontal rectifying plate 8 on the take-up side guide 4 side is a free end, and the other outer peripheral portion is extended to the side inner wall surface of the coagulation bath 5. ing.
- the accompanying flow of the coagulating liquid generated by the travel of the yarn 2 spun from the spout gold 1 hits the bottom surface of the coagulating bath 5 and faces the inner surface of the side wall of the coagulating bath 5. It flows backward on the inner surface.
- the accompanying flow and the backflow collide with each other to generate a turbulent flow, and the coagulation liquid surface shake accompanying the liquid surface accompanying flow is derived.
- the three embodiments shown in FIGS. 5 to 7 are examples in which the opening 8a at the center of the horizontal rectifying plate 8 is communicated with the outside by the communication portion 8b.
- the range surrounding the yarn surrounded by the lateral rectifying plate 8 is a range of 50% or more and less than 80%
- the lateral rectifying plate 8 is constituted by a plurality of plates, and the respective openings are The proportion of the opening 8a in the outer peripheral portion is 20% or less.
- each plate may have the same shape or a different shape.
- the point of suppressing the liquid level fluctuation and the lateral rectifying plate can be constituted by a single plate, which is preferable because the structure is simple, 100% is more preferable.
- the horizontal rectifying plate 8 since the horizontal rectifying plate 8 is disposed directly below the spinning nozzle 1, the accompanying flow and its repelling flow cancel each other out, and at the same time, the mixed flow directed upward is laterally rectified. It is blocked by the plate 8 and goes from the lateral rectifying plate 8 toward the outer periphery thereof. As a result, the coagulation liquid around the die is less likely to be shaken, the contact between the spinning nozzle 1 and the coagulation liquid is prevented, and stable spinning becomes possible. In particular, in the embodiment shown in FIGS. 3 and 4, since the turbulent flow that climbs from below is completely blocked by the horizontal rectifying plate 8, the liquid surface around the bottom of the spout 1 is not shaken and more stable. Spinning is possible.
- the angle formed by the surface of the horizontal rectifying plate 8 and the horizontal plane in the outer side of the coagulation bath is preferably 75 degrees or less. If it is the said angle, it will become easy to relieve
- the angle is more preferably 50 degrees or less, and further preferably 30 degrees or less.
- the horizontal width dimension (hereinafter, simply referred to as a horizontal width dimension) of the plates constituting the horizontal rectifying plate 8 is defined as follows. “Horizontal width dimension of the plate constituting the horizontal rectifying plate 8” means “from the shortest distance (A) from the central axis of the yarn to be spun to the outer periphery of the plate, in the same vertical plane as this direction. The shortest distance (B) from the center axis of the yarn to be taken out to the outer periphery of the opening 8a is reduced, provided that the communication portion 8b exists in the vertical plane, the communication portion 8b is a horizontal rectifying plate. 8 is calculated assuming that the plate is a component of FIG.
- the horizontal width of the plate constituting the horizontal rectifying plate 8 rebounds from the bottom surface of the coagulation bath 5 and extends along the side wall surface of the coagulation bath 5 toward the direction opposite to the spinning direction, that is, toward the coagulation liquid surface of the coagulation bath 5.
- the width dimension necessary for reducing the speed of the rebounding flow and for facilitating dispersion is 5 mm or more.
- the thickness is more preferably 10 mm or more.
- the plate constituting the lateral rectifying plate 8 has the running surface of the yarn 2 opened, and in order to suppress the accompanying flow that flows backward along the side wall surface of the coagulation bath 5, as described above, the yarn It is preferable to extend to the inner surface of the side wall of the coagulation bath 5 excluding the take-up direction of the strip 2.
- the installation position in the height direction of the plate constituting the horizontal rectifying plate 8 rebounds on the bottom surface of the coagulation bath 5 and is along the side wall surface in the coagulation bath 5 in the direction opposite to the spinning direction of the spun yarn 2, that is, coagulation.
- the liquid surface height of the coagulating bath is set to zero point in the depth direction from 0 mm. It is preferable to install in a deep position.
- rate of the accompanying flow which flows backwards can be eased more, it can disperse
- the shortest distance between the plate constituting the horizontal rectifying plate 8 and the yarn 2 is preferably separated by 5 mm or more in order to prevent damage to the fibers due to contact between the two. Further, if the shortest distance between the horizontal rectifying plate 8 and the yarn 2 is 100 mm or less, the accompanying flow that flows backward toward the liquid surface of the coagulating liquid is effectively relaxed and dispersed, and the liquid level fluctuation is reduced. This is preferable.
- the shortest distance between the horizontal rectifying plate 8 and the yarn 2 is more preferably 10 mm to 50 mm in order to avoid contact between the two and rectify the accompanying flow that flows backward.
- the plate constituting the horizontal rectifying plate 8 may be a non-porous plate material or a porous plate, but is preferably a porous plate in terms of reducing the flow of the rebound flow.
- As the perforated plate it is preferable to use a punching metal or a wire mesh.
- punching metal is used as the perforated plate, the opening ratio is preferably 5% or more because the speed of the accompanying flow that flows backward can be reduced and dispersed as compared with the non-porous plate material.
- An aperture ratio of 95% or less is preferable because an effect of suppressing liquid level fluctuation is produced as compared with a case where no punching metal is installed.
- an aperture ratio of 20% to 70% is more preferable.
- the diameter of the hole is more preferably set in the range of 0.5 mm to 50 mm, and more preferably 1 mm or more and 10 mm or less.
- the mesh of the wire mesh is preferably 800 mesh or less. Moreover, if it is 2 mesh or more, the effect which suppresses a liquid level fluctuation
- the perforated plate constituting the horizontal rectifying plate 8 punching metal, wire mesh and the like can be mentioned as described above, but any porous material having a shape retaining property may be used, and is not limited thereto.
- the material of the horizontal rectifying plate 8 is not limited to metal such as stainless steel or plastic.
- the thickness of the horizontal rectifying plate 8 is preferably about 0.5 mm or more and 30 mm or less in order to achieve both shape retention and handleability. Further, the horizontal rectifying plate 8 can be made into a two-part structure as viewed from the top of the coagulation bath in order to simplify the attachment and detachment to the coagulation bath.
- a vertical flow straightening plate 9 disposed between the spinning outlet 1 and the take-up guide 4 arranged on the yarn take-up side in the present invention and extending in the height direction in the coagulation bath is shown in FIGS. As described above, it extends upward from a part of the outer peripheral part of the plate constituting the horizontal rectifying plate 8 to the liquid level, or similarly extends upward from a part of the outer peripheral part of the horizontal rectifying plate 8 to the liquid level and on the bottom surface. It extends downward. The remaining portion of the outer peripheral portion of the horizontal rectifying plate 8 not provided with the vertical rectifying plate 9 is changed in the traveling direction by the direction changing guide 3 in the coagulation bath, and then the yarn 2 passes through the take-up guide 4. Except for the outer peripheral portion in the direction of take-off, it is installed extending to the inner surface of the side wall in the coagulation bath 5.
- the vertical rectifying plate 9 in the present invention is installed so as to surround the yarn 2 substantially in parallel with the spinning direction of the yarn 2 spun downward from the base.
- the horizontal rectifying plate 8 extends upward from the outer peripheral portion of the plate to the liquid level, or extends upward from the outer peripheral portion of the horizontal rectifying plate 8 to the liquid level, and extends downward toward the bottom surface.
- an opening ratio of 5% or more and 95% or less is required in order to suppress the occurrence of an accompanying flow toward the take-up guide 4 and other liquid level fluctuation factors and bring about a rectifying effect. It is preferable that In order to obtain a more uniform rectifying effect, an aperture ratio of 20% to 70% is more preferable.
- the diameter of the hole is preferably from 0.5 mm to 50 mm, and more preferably from 1 mm to 10 mm.
- the mesh size is more preferably 10 mesh or more and 400 mesh or less, and further preferably 20 mesh or more and 200 mesh or less.
- the vertical rectifying plate 9 may be a porous material or a non-porous plate material.
- the porous material include a metal mesh and punching metal, but any plate material or cylindrical member made of a porous material having shape retaining property may be used, and the porous material is not limited thereto.
- the material of the plate material and the cylindrical member is not limited, such as metal or plastic.
- the upper half of the vertical rectifying plate 9 is a plate-like member and the lower half is a wire mesh, or the upper half is a punching metal and the lower half is a plate-like member.
- the cross-sectional shape of the vertical rectifying plate 9 viewed from above the solidification bath 5 may be a circular cross section, an elliptical cross section, an arc cross section, or a polygonal cross section.
- the accompanying flow accompanying the traveling of the spun yarn from directly below the spout gold 1 rebounds on the bottom surface of the coagulation bath 5 and is opposite to the traveling direction of the spun yarn along the inner surface of the side wall of the coagulation bath 5. It flows backward in the direction, that is, toward the liquid level of the coagulation bath. If this flow is strong, liquid level fluctuations occur, causing troubles such as single yarn breakage and single yarn adhesion. In order to suppress this, by installing the horizontal rectifying plate 8, the speed of the liquid flow rising in the direction opposite to the spinning direction of the spun yarn 2 is relaxed and dispersed, so Compared with the case where only the current plate is provided, it has a great effect on the suppression of the liquid level fluctuation.
- the horizontal rectifying plate and the vertical rectifying plate it becomes easy to suppress the liquid level fluctuation factors other than the accompanying flow accompanying the traveling of the yarn 2, for example, the liquid level fluctuation from the direction of the take-up side guide 4 and the like. It is effective.
- the dry and wet spinning device of the present invention By using the dry and wet spinning device of the present invention, it is possible to spin synthetic fibers with less liquid level fluctuation in the coagulation bath and less adhesion between single fibers.
- the number of holes is preferably 5000 or less, and more preferably 4000 or less. If it is 5000 or less, it becomes easy to reduce the liquid level fluctuation.
- the lower limit of the number of holes is not particularly limited, but if the number of holes is 2500 or more, the liquid level fluctuation increases, and therefore the dry and wet spinning apparatus of the present invention can be suitably used. Next, the present invention will be described more specifically based on examples.
- Example 1 A spinning stock solution in which a polymer having an intrinsic viscosity [ ⁇ ] 1.8 consisting of 96% by mass of acrylonitrile, 1% by mass of methacrylic acid, and 3% by mass of methyl acrylate is dissolved in dimethylacetamide, and the concentration of the polymer is 23% by mass.
- This spinning dope is filtered through a 20 ⁇ and a 5 ⁇ filter, kept at 70 ° C., and spun and solidified by a dry and wet spinning method using a die having a diameter of 0.15 mm and a hole number of 3000, and the apparatus shown in FIGS. I got a thread.
- the obtained coagulated yarn was stretched in the air, then stretched and washed in hot water, and treated with a silicone-based oil to obtain a process yarn.
- the process yarn is dried and further subjected to dry heat drawing with a heating roll, the total draw ratio is set to 9 times, and an acrylic precursor fiber bundle for producing a carbon fiber having a single fiber fineness of 0.9 dtex and 3000 filaments is obtained. It was.
- the depth of the horizontal rectifying plate from the liquid surface is 50 mm
- the distance between the outer circumferential surface of the running yarn and the horizontal rectifying plate is 30 mm
- the material of the horizontal rectifying plate is a wire mesh (30 mesh, manufactured by Kansai Wire Mesh Co., Ltd.).
- Fine diameter 0.18 mm, mesh 0.67 mm, material: SUS304 Fine diameter 0.18 mm, mesh 0.67 mm, material: SUS304).
- the lateral width of the lateral rectifying plate was 100 mm at a wide area and 10 mm at a narrow area.
- the vertical rectifying plate was made of a material SUS304 with a thickness of 2 mm for the upper half and a wire mesh (30 mesh, wire diameter 0.18 mm, mesh 0.67 mm, material: SUS304) made by Kansai Wire Mesh Co., Ltd. for the lower half.
- the coagulation liquid surface was shaken and the cross-section of the fiber bundle obtained as a drawn yarn was observed with an electron microscope and subjected to a dispersion test.
- the analysis result of the flow velocity is shown in Table 1.
- the maximum flow rate of the coagulation bath liquid surface by numerical analysis was 8 cm / second.
- Example 2 As shown in FIGS. 14 and 15, the spinning dope is prepared under the same conditions as in Example 1 except that a vertical rectifying plate extending downward from the outer periphery of the horizontal rectifying plate toward the bottom surface of the coagulation bath is not installed. Prepared and spun by the same procedure.
- the material of the vertical rectifying plate was a wire mesh (14 mesh, wire diameter 0.29 mm, mesh 1.52 mm, material: SUS304) manufactured by Kansai Wire Mesh Co., Ltd.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 9 cm / sec.
- Example 3 As shown in FIGS. 8 and 9, the depth of the horizontal rectifying plate from the liquid surface is 100 mm, the distance between the running yarn outer circumferential surface and the horizontal rectifying plate is 35 mm, and the material of the horizontal rectifying plate is Kansai Wire Mesh Co., Ltd. A metal mesh (120 mesh, wire diameter 0.08 mm, mesh 0.132 mm, material: SUS304) was used. The material of the vertical rectifying plate between the base and the take-up side guide is that the entire surface is a wire mesh (30 mesh, wire diameter 0.18 mm, mesh 0.67 mm, material: SUS304) manufactured by Kansai Wire Mesh Co., Ltd. A stock spinning solution was prepared under the same conditions as in Example 1, and spun by the same operation.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 9 cm / sec.
- Example 4 As shown in FIGS. 10 and 11, the same as in Example 3 except that a vertical rectifying plate is installed between the take-up guide and the base extending from the outer periphery of the horizontal rectifying plate to the liquid surface. A spinning dope was prepared and spun by the same procedure.
- the vertical rectifying plate was a plate of material SUS304 and thickness 2 mm. Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 10 cm / second.
- Example 5 As shown in FIGS. 1 and 2, only the horizontal rectifying plate was installed at a depth of 100 mm from the liquid level without installing the vertical rectifying plate.
- the material of the horizontal rectifying plate was prepared in the same manner as in Example 1 as a wire mesh (30 mesh, wire diameter 0.18 mm, mesh 0.67 mm, material: SUS304) manufactured by Kansai Wire Mesh Co., Ltd. And spun.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 12 cm / sec.
- Example 6 As shown in FIGS. 3 and 4, the horizontal rectifying plate was installed at a position having a depth of 100 mm from the liquid surface.
- the material of the horizontal rectifying plate was prepared by using a wire mesh (20 mesh, wire diameter 0.25 mm, mesh 1.02 mm, material: SUS304) manufactured by Kansai Wire Mesh Co., Ltd. Spinning by operation.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test.
- the maximum flow velocity of the coagulation bath liquid surface was 13 cm / sec.
- Example 7 As shown in FIGS. 16 and 17, a horizontal rectifying plate and a vertical rectifying plate were installed.
- the depth of the horizontal rectifying plate from the liquid surface is 100 mm
- the distance between the running yarn outer peripheral surface and the horizontal rectifying plate is 30 to 50 mm
- the material of the horizontal rectifying plate is a wire mesh (30 mesh, wire) manufactured by Kansai Wire Mesh Co., Ltd.
- the diameter was 0.18 mm
- the mesh was 0.67 mm
- the material was SUS304.
- the material of the vertical rectifying plate between the base and the take-up side guide is as follows: the upper half is made of material SUS304, a 2 mm thick plate, and the lower half is a wire mesh made by Kansai Wire Mesh Co., Ltd. (30 mesh, wire diameter 0.18 mm, A spinning stock solution was prepared in the same manner as in Example 1 with a mesh of 0.67 mm and material: SUS304), and was spun by the same operation.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 9 cm / sec.
- Example 8 As shown in FIGS. 18 and 19, a horizontal rectifying plate and a vertical rectifying plate were installed.
- the depth of the horizontal rectifying plate from the liquid surface is 100 mm
- the distance between the running yarn outer peripheral surface and the horizontal rectifying plate is 50 to 70 mm
- the material of the horizontal rectifying plate is a wire mesh made by Kansai Wire Mesh Co., Ltd. (30 mesh, wire The diameter was 0.18 mm, the mesh was 0.67 mm, and the material was SUS304.
- the material of the vertical rectifying plate between the base and the take-up side guide is as follows: the upper half is made of material SUS304, a 2 mm thick plate, and the lower half is a wire mesh made by Kansai Wire Mesh Co., Ltd.
- Example 1 (30 mesh, wire diameter 0.18 mm, A spinning stock solution was prepared in the same manner as in Example 1 with a mesh of 0.67 mm and a material of SUS304, and was spun by the same operation.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 10 cm / second.
- Example 9 As shown in FIGS. 20 and 21, a horizontal rectifying plate and a vertical rectifying plate were installed.
- the depth of the horizontal rectifying plate from the liquid surface is 100 mm
- the distance between the running yarn outer peripheral surface and the horizontal rectifying plate is 50 to 70 mm
- the material of the horizontal rectifying plate is a wire mesh made by Kansai Wire Mesh Co., Ltd. (30 mesh, wire The diameter was 0.18 mm, the mesh was 0.67 mm, and the material was SUS304.
- a spinning stock solution was prepared in the same manner as in Example 1 using a material of SUS304 and a thickness of 2 mm, and spinning was performed in the same manner.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 10 cm / second.
- Example 1 As shown in FIG. 22 and FIG. 23, a spinning stock solution was prepared in the same manner as in Example 1, except that a rectangular flow straightening plate having a material of SUS304 and a thickness of 2 mm was placed without installing a horizontal flow straightening plate in the coagulation bath. was prepared and spun by the same operation. Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Moreover, as a result of conducting the numerical analysis similar to Example 1, the maximum flow velocity of the coagulation bath liquid surface was 17 cm / sec.
- straightening board was installed between the nozzle
- the material of the vertical rectifying plate is a wire mesh (30 mesh, wire diameter 0.18 mm, mesh 0.67 mm, material: SUS304) manufactured by Kansai Wire Mesh Co., Ltd., and a spinning dope is prepared in the same manner as in Example 1. Spinning was performed by the same operation.
- Table 1 shows the results of evaluating the presence or absence of single fiber adhesion by observation with an electron microscope of the state of shaking of the coagulation liquid surface and the cross section of the fiber bundle obtained as a drawn yarn and a dispersion test. Further, as a result of the same numerical analysis as in Example 1, the maximum flow velocity of the coagulation bath liquid surface was 18 cm / sec.
- Example 10 As shown in FIG. 5, the horizontal rectifying plate has a depth of 100 mm from the liquid surface, the material and the horizontal width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- solidification was performed as a result of performing the same numerical analysis as in Example 1.
- the maximum flow rate on the bath liquid surface was 13 cm / sec.
- Example 11 As shown in FIG. 6, the horizontal rectifying plate has a depth of 100 mm from the liquid surface, the material and the horizontal width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- solidification was performed as a result of performing the same numerical analysis as in Example 1.
- the maximum flow rate at the bath liquid level was 14 cm / sec.
- the horizontal rectifying plate has a depth of 100 mm from the liquid surface, the material and the horizontal width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- the horizontal flow straightening plate is divided into 16 parts of the area surrounding the running yarn, and the horizontal flow straightening plate is installed at a ratio of 50%, and a spinning dope is prepared in the same manner as in Example 1, and the spinning is performed in the same operation.
- the maximum flow velocity of the coagulation bath liquid surface was 13 cm / sec.
- Example 13 As shown in FIG. 27, the depth of the horizontal rectifying plate from the liquid surface is 100 mm, the material and the width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- the maximum flow velocity at the liquid level was 10 cm / second.
- Example 14 As shown in FIG. 28, the depth of the horizontal rectifying plate from the liquid surface is 100 mm, the material and the width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm. As a result of preparing a spinning stock solution in the same manner as in Example 1 and spinning in the same operation with the mounting angle of the horizontal rectifying plate set to 75 degrees upward, and performing the same numerical analysis as in Example 1. The maximum flow velocity at the liquid level was 12 cm / second.
- Example 15 As shown in FIG. 30, the horizontal rectifying plate has a depth of 100 mm from the liquid surface, the material of the horizontal rectifying plate and the horizontal width are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- the same numerical analysis as in Example 1 was performed.
- the maximum flow velocity at the liquid level was 12 cm / second.
- Example 16 As shown in FIG. 31, the depth of the horizontal rectifying plate from the liquid surface is 100 mm, the material and the width of the horizontal rectifying plate are the same as those in Example 1, and the distance between the horizontal rectifying plate and the yarn is 30 mm.
- the coagulation bath The maximum flow velocity at the liquid level was 13 cm / second.
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Abstract
Description
前記横整流板は、1枚または複数枚の板で構成されており、中央に前記糸条を通過させる開口部を有しており、前記横整流板により、前記糸条の周囲の50%以上の範囲が囲まれる。
また、前記開口部は、前記横整流板に連通部を設けることにより、前記横整流板の外部と連通させることができ、前記連通部によって形成される開口は、それぞれが前記開口部の外周部分の20%以下の範囲である。
図1は、本発明に係る乾湿式紡糸装置の一実施形態を示しており、図中の符号1は紡出口金、2は紡出糸条、3は凝固浴中の方向転換ガイド、4は引取側ガイド、5は凝固浴槽、6は凝固流出受け槽、7は循環ポンプ、8は横整流板、8aは開口部である。
横整流板8により囲まれる前記糸条の周囲の範囲が50%以上80%未満の範囲である場合は、前記横整流板8を複数枚の板で構成して、前記それぞれの開口が、前記開口部8aの外周部分に占める割合を20%以下とする。
横整流板8を複数枚の板で構成する場合、各板は同じ形状であっても良いし異なる形状であっても良い。
横整流板8を構成する板の横幅寸法は、凝固浴槽5の底面ではね返り、凝固浴槽5の側壁面に沿って、紡出方向とは反対の方向、つまり凝固浴槽5の凝固液面に向かって逆流してくるはね返り流の速度を緩和、分散しやすくするために必要な幅寸法を、5mm以上とすることが好ましい。更に均一な整流効果をもたらすためには10mm以上とすることがより好ましい。なお、板の横幅の寸法には特に上限はなく、凝固浴槽5の大きさに応じて適宜設定すればよい。
多孔板としてパンチングメタルを用いる場合、無孔の板材に比べて逆流してくる随伴流の速度を緩和、分散できることから、その開口率は5%以上が好ましい。また、開口率が95%以下であれば、パンチングメタルを設置しない場合よりも液面揺れを抑制する効果が生じるため好ましい。更に均一な整流効果をもたらすためには20%以上70%以下の開口率とすることがより好ましい。孔の直径は0.5mm~50mmの範囲に設定するのがより好ましく、1mm以上10mm以下がさらに好ましい。
特に、1つのノズルパックで使用するノズルの孔数を多くすると、液面揺れが大きくなるので、ノズル孔数が多いノズルを使用する際に効果的である。孔数は、5000以下が好ましく、4000以下が更に好ましい。
5000以下であれば、液面揺れを小さくできやすくなる。
孔数の下限は特に制限は無いが、孔数が2500以上であれば、液面揺れが大きくなるため、本発明の乾湿式紡糸装置が好適に用いることができる。
次に、実施例に基づいて本発明を更に具体的に説明する。
凝固液面を目視で観察し、糸条が凝固液に入る近傍の液面の揺れを評価した。
◎:液面揺れが非常に小さい、○:液面揺れが小さい、×:液面揺れが大きい。
電子顕微鏡による観察は、延伸糸として得られた繊維束断面を走査電子顕微鏡(XL-20、フィリップス エレクトロン オプティックス社製)で1000倍に拡大して観察、接着の有無を確認した。なお接着の有無を確認した単繊維本数は400本であった。
分散テストは、3mmの長さにカットした単繊維数が3000本の繊維束を、アセトンが200ml入ったビーカーに入れて10分間マグネットスターラーにて攪拌し、その後、下部に黒紙を敷いたガラスシャーレに移液して上方からライトを当てて接着糸を数えた。
数値解析ツール(メーカー:アンシス・ジャパン株式会社、解析ソフト:FLUENT)を用い、凝固浴中の凝固糸の流動状態について定常流体解析を行った。
アクリロニトリル96質量%、メタクリル酸1質量%、アクリル酸メチル3質量%、からなる極限粘度〔η〕1.8の重合体を、ジメチルアセトアミドに溶解し、重合体の濃度が23質量%の紡糸原液を調製した。この紡糸原液を20μおよび5μのフィルターで濾過し、70℃に保持させて、直径0.15mm、孔数3000の口金、図12及び図13に示す装置を用いて乾湿式紡糸法により紡出し凝固糸を得た。凝固浴の組成はジメチルアセトアミド/水=78/22(質量%)、温度15℃、ノズル面と凝固浴の距離は4mmとし、紡糸原液を凝固浴に導入した。
このときの凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果と、数値解析ツールにより凝固液面の最大流速を解析結果を表1に示す。
数値解析による凝固浴液面の最大流速は8cm/秒であった。
図14及び図15に示すように、横整流板の外周から凝固浴槽の底面に向けて下方向に延びる縦整流板を設置していない以外は、実施例1と同様の条件にて紡糸原液を調製し、同じ操作により紡糸した。なお、縦整流板の材質は、関西金網(株)製の金網(14メッシュ、線径0.29mm、網目1.52mm、材質:SUS304)とした。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は9cm/秒であった。
図8及び図9に示すように、横整流板の液面からの深さは100mm、走行糸条外周面と横整流板との距離は35mm、横整流板の材質は、関西金網(株)製の金網(120メッシュ、線径0.08mm、網目0.132mm、材質:SUS304)とした。口金と引取側ガイドとの間の縦整流板の材質は、全面を関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)とした以外は、実施例1と同様の条件にて紡糸原液を調製し、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は9cm/秒であった。
図10及び図11に示すように、横整流板の外周から液面上まで上方向に延ばした引取り側ガイドと口金との間の縦整流板を設置した以外は、実施例3と同様に紡糸原液を調製し、同じ操作により紡糸した。なお、縦整流板は、材質SUS304、厚さ2mmの板とした。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は10cm/秒であった。
図1及び図2に示すように、縦整流板を設置せずに、横整流板だけを液面からの深さ100mmの位置に設置した。横整流板の材質は、関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)として実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は12cm/秒であった。
図3及び図4に示すように、横整流板を液面からの深さ100mmの位置に設置した。横整流板の材質は、関西金網(株)製の金網(20メッシュ、線径0.25mm、網目1.02mm、材質:SUS304)を使い、実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は13cm/秒であった。
図16及び図17に示すように、横整流板及び縦整流板を設置した。横整流板の液面からの深さは100mm、走行糸条外周面と横整流板との距離は30~50mm、横整流板の材質は、関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)とした。口金と引取り側ガイドとの間の縦整流板の材質は、上半分を材質SUS304、厚さ2mmの板、下半分を関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)として、実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は9cm/秒であった。
図18及び図19に示すように、横整流板及び縦整流板を設置した。横整流板の液面からの深さは100mm、走行糸条外周面と横整流板との距離は50~70mm、横整流板の材質は、関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)とした。口金と引取り側ガイドとの間の縦整流板の材質は、上半分を材質SUS304、厚さ2mmの板、下半分を関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)として実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は10cm/秒であった。
図20及び図21に示すように、横整流板及び縦整流板を設置した。横整流板の液面からの深さは100mm、走行糸条外周面と横整流板との距離は50~70mm、横整流板の材質は、関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)とした。口金と引取り側ガイドとの間の縦整流板の材質は、材質SUS304、厚さ2mmの板として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸した。凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は10cm/秒であった。
図22及び図23に示すように、凝固浴槽に横整流板を設置せずに、材質SUS304、厚さ2mmの4角筒状の縦整流板を設置して、実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。
凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は17cm/秒であった。
図24及び図25に示すように、凝固浴槽に横整流板を設置せずに、口金と引取り側ガイドとの間に縦整流板を設置した。縦整流板の材質は、全面を関西金網(株)製の金網(30メッシュ、線径0.18mm、網目0.67mm、材質:SUS304)とし、実施例1と同様に紡糸原液を調製し、同じ操作にて紡糸した。
凝固液面の揺れの状態及び延伸糸として得られた繊維束断面の電子顕微鏡による観察と分散テストとで単繊維接着の有無について評価した結果を表1に示す。
また、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は18cm/秒であった。
図5に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板が走行糸条を取り囲む範囲を90%として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は13cm/秒であった。
図6に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板が走行糸条を取り囲む範囲を80%として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は14cm/秒であった。
図7に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板が走行糸条を取り囲む範囲を16分割しその50%の割合に横整流板を設置して、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は13cm/秒であった。
図26に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板が走行糸条を取り囲む範囲を50%として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は26cm/秒であり、電子顕微鏡観察及び分散テストによる糸接着数が多かった比較例1の数値解析結果(17cm/秒)よりも悪化した。
図27に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を上に凸45度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は10cm/秒であった。
図28に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を上に凸75度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は12cm/秒であった。
図29に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を上に凸80度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は17cm/秒であった。
図30に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を下に凸45度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は12cm/秒であった。
図31に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を下に凸75度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は13cm/秒であった。
図32に示すように、横整流板の液面からの深さは100mm、横整流板の材質及び横幅寸法は実施例1のものと同じであり、横整流板と糸条との距離を30mm、横整流板の取り付け角度を下に凸80度として、実施例1と同様に紡糸原液を調製して、同じ操作にて紡糸し、実施例1と同様の数値解析を行った結果、凝固浴液面の最大流速は20cm/秒であった。
2:(紡出)糸条
3:方向転換ガイド
4:引取側ガイド
5:凝固浴槽
6:凝固流出受け槽
7:循環ポンプ
8:横整流板
8a:開口部
8b:連通部
9:縦整流板
Claims (16)
- 口金と凝固浴とを有する乾湿式紡糸装置であって、口金から下方に紡出される糸条の周囲の全部または一部を囲み、凝固浴中に配される横整流板を有し、
前記横整流板は、1枚または複数枚の板で構成され、中央に前記糸条を通過させる開口部を有しており、
前記横整流板により、前記糸条の周囲の50%以上の範囲が囲まれ、
前記開口部は、前記横整流板に連通部を設けることにより、前記横整流板の外部と連通させることができ、
前記連通部によって形成される開口は、それぞれが前記開口部の外周部分の20%以下の範囲である
乾湿式紡糸装置。 - 前記横整流板の面と水平面とが、凝固浴外側方向に形成する角度が75度以下である請求項1に記載の乾湿式紡糸装置。
- 前記横整流板を構成する板の横幅寸法が5mm以上である、請求項1または2に記載の乾湿式紡糸装置。
- 前記横整流板の一部又は全部が凝固浴の壁面まで延びている、請求項1~3のいずれかに記載の乾湿式紡糸装置。
- 前記横整流板の糸条に近い端部が、液面以下の位置に設置されている、請求項1~4のいずれかに記載の乾湿式紡糸装置。
- 前記横整流板の糸状に近い端部と糸条との距離が、5~100mmである、請求項1~5のいずれかに記載の乾湿式紡糸装置。
- 前記横整流板が多孔板である請求項1~6のいずれかに記載の乾湿式紡糸装置。
- 前記多孔板がパンチングメタルであり、開口率が5~95%、孔の直径が0.5mm~50mmである、請求項7に記載の乾湿式紡糸装置。
- 前記多孔板が金網であり、メッシュの大きさが2~800メッシュである、請求項7に記載の乾湿式紡糸装置。
- 前記横整流板の外周部の一部又は全部に、液面まで上方に延びる板からなる縦整流板を有する、請求項1~9のいずれかに記載の乾湿式紡糸装置。
- 前記横整流板の外周部の一部又は全部に、液面上まで上方向に延びる板からなる縦整流板と下方向に延びる板からなる縦整流板とを有する、請求項1~9のいずれかに記載の乾湿式紡糸装置。
- 前記縦整流板が多孔板である請求項10または11に記載の乾湿式紡糸装置。
- 前記縦整流板がパンチングメタルであり、開口率が5~95%、孔の直径が0.5mm~50mmである、請求項12に記載の乾湿式紡糸装置。
- 前記縦整流板が金網であり、メッシュの大きさが2~800メッシュである、請求項12に記載の乾湿式紡糸装置。
- 前記横整流板及び/又は前記縦整流板とが、取り付け及び取り外しが可能である、請求項1~14のいずれかに記載の乾湿式紡糸装置。
- 請求項1~15に記載の乾湿式紡糸装置を用いて合成繊維を紡糸する合成繊維の製造方法。
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CN115418731A (zh) * | 2022-09-14 | 2022-12-02 | 长盛(廊坊)科技有限公司 | 一种用于干喷湿纺纺丝机的排料装置及其使用方法 |
US11932971B2 (en) | 2018-10-29 | 2024-03-19 | Toray Industries, Inc. | Method of producing precursor fiber for carbon fiber and carbon fiber |
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