WO2022038901A1 - ブッシング及び異形断面ガラス繊維製造方法 - Google Patents

ブッシング及び異形断面ガラス繊維製造方法 Download PDF

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Publication number
WO2022038901A1
WO2022038901A1 PCT/JP2021/024145 JP2021024145W WO2022038901A1 WO 2022038901 A1 WO2022038901 A1 WO 2022038901A1 JP 2021024145 W JP2021024145 W JP 2021024145W WO 2022038901 A1 WO2022038901 A1 WO 2022038901A1
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WO
WIPO (PCT)
Prior art keywords
nozzle
nozzles
nozzle row
cooling
bushing
Prior art date
Application number
PCT/JP2021/024145
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English (en)
French (fr)
Japanese (ja)
Inventor
禅 松浦
Original Assignee
日本電気硝子株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電気硝子株式会社 filed Critical 日本電気硝子株式会社
Priority to CN202180050767.3A priority Critical patent/CN115916714A/zh
Publication of WO2022038901A1 publication Critical patent/WO2022038901A1/ja

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    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
    • C03B37/00—Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
    • C03B37/08—Bushings, e.g. construction, bushing reinforcement means; Spinnerettes; Nozzles; Nozzle plates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/50—Glass production, e.g. reusing waste heat during processing or shaping
    • Y02P40/57—Improving the yield, e-g- reduction of reject rates

Definitions

  • the present invention relates to an improvement in a manufacturing technique for a glass fiber having a modified cross section.
  • Irregular cross-section glass fiber having a non-circular cross-section such as an oval or elliptical cross-section is used in various fields because it can realize a high reinforcing effect when mixed with a resin and composited. There is.
  • This kind of irregular cross-section glass fiber is generally manufactured by cooling while pulling out molten glass from a bushing nozzle. At this time, since the cross-sectional shape of the manufactured glass fiber depends on the shape of the nozzle hole at the tip of the nozzle, when manufacturing a glass fiber having a modified cross section, the nozzle hole is often flattened at the tip of the nozzle. ..
  • a concave notch is provided in each of the pair of long wall portions facing each other in the minor axis direction of the flat nozzle hole, and the concave shape is formed.
  • the viscosity of the molten glass is adjusted by cooling with the notch.
  • the molten glass may be cooled too much. Therefore, it may not be possible to stably form the irregular cross-section glass fiber.
  • the bushing according to the present invention comprises a base plate extending in a predetermined direction and having a plurality of cooling regions in which a cooling member configured to cool the molten glass can be arranged, and the molten glass provided on the base plate.
  • the flat nozzle hole faces the nozzle hole in the minor axis direction, and the pair of first wall portions having a concave notch face each other in the major axis direction of the nozzle hole.
  • a glass fiber manufacturing apparatus comprising a pair of second wall portions and a plurality of nozzles comprising, wherein the plurality of nozzles are arranged so that the first wall portion faces toward the cooling region.
  • a first nozzle row in which a plurality of the nozzles are arranged at predetermined intervals along the extending direction of the cooling region, and the first nozzle row.
  • a pair of the nozzles in the first nozzle row is arranged with a second nozzle row in which a plurality of the nozzles are arranged with a predetermined spacing along the extending direction of the cooling region.
  • the nozzles of the first nozzle row are arranged so that each of the notches provided in the first wall portion of the above can face the cooling region.
  • the productivity of the irregularly shaped cross-section glass fiber can be improved, and a large number of glass fibers can be obtained at one time, so that a strand having a large count can be manufactured.
  • one notch directly faces the cooling member, and the other notch faces the cooling member through the region of the gap between the nozzles of the second nozzle row. It is possible to prevent the molten glass from being overcooled.
  • the viscosity of the molten glass at the time of molding can be appropriately adjusted, and the irregular cross-section glass fiber can be stably molded. If the other notch faces only the nozzles in the second nozzle row, the molten glass is not cooled.
  • the nozzles of the second nozzle row are provided so that each of the notches provided in the pair of first wall portions of the nozzles in the second nozzle row can face the cooling region. Is preferably arranged.
  • the viscosity of the molten glass at the time of molding can be appropriately adjusted, and the deformed cross-section glass fiber can be stably molded. can.
  • the distance between the plurality of nozzles in the first nozzle row and between the plurality of nozzles in the second nozzle row is preferably narrower than the width of the tip of the notch of the nozzle in the nozzle. ..
  • the modified cross-section glass fiber manufacturing method according to the present invention is characterized in that the deformed cross-section glass fiber is manufactured by using the above-mentioned bushing. According to such a configuration, the same effect as the configuration already described can be obtained.
  • the molten glass is E glass. Since the E glass is a glass that does not easily devitrify, the productivity of the irregular cross-section glass fiber is improved.
  • the molten glass preferably has a viscosity of 10 2.0 to 10 3.5 dPa ⁇ s at the molding temperature. That is, when it is 103.5 dPa ⁇ s or less, the viscosity of the molten glass does not become too high, so that the moldability of the glass fiber can be well maintained. Further, when it is 10 2.0 dPa ⁇ s or more, the viscosity of the molten glass does not become too low, so that the force of the molten glass to return to the circular cross section is weakened by the surface surface force, and the flatness ratio (major axis) of the glass fiber is weakened. Dimension / minor axis dimension) can be increased.
  • a desired modified cross-section glass fiber can be stably produced.
  • FIG. 1 is a cross-sectional view showing a modified cross-sectional glass fiber manufacturing apparatus according to an embodiment of the present invention.
  • FIG. 2 is an enlarged cross-sectional view showing the periphery of the bushing nozzle of FIG.
  • FIG. 3 is an enlarged bottom view showing the periphery of the bushing nozzle of FIG. 1.
  • 4A and 4B are views showing a bushing nozzle according to an embodiment of the present invention, in which FIG. 4A is a side view thereof, FIG. 4B is a sectional view taken along the line A1-A1 of FIG. It is a cross-sectional view of B1-B1 of.
  • FIG. 5 is an enlarged bottom view showing the periphery of the bushing nozzle of FIG.
  • FIG. 6 is an enlarged bottom view showing the periphery of the bushing nozzle according to the comparative example.
  • the modified cross-section glass fiber manufacturing apparatus 10 includes a glass melting furnace 1, a fore hearth 2 connected to the glass melting furnace 1, and a feeder 3 connected to the fore hearth 2. ing.
  • the X direction and the Y direction are the horizontal direction
  • the Z direction is the vertical direction (hereinafter, the same applies).
  • the molten glass G is supplied from the glass melting furnace 1 to the feeder 3 through the fore hearth 2 and is stored in the feeder 3.
  • a plurality of feeders 3 may be connected to the glass melting furnace 1.
  • a clarification furnace may be provided between the glass melting furnace 1 and the fore hearth 2.
  • the molten glass G is made of E glass, but may be another glass material such as D glass, S glass, AR glass, and C glass.
  • a bushing 4 is arranged at the bottom of the feeder 3.
  • the bushing 4 is attached to the feeder 3 via a bushing block or the like.
  • the bottom of the bushing 4 is composed of a base plate 41 as shown in FIG. 2, and the base plate 41 is provided with a plurality of nozzles 5. Further, the base plate 41 is provided with a plurality of cooling regions S extending in the Y direction, which is a predetermined direction, in which the cooling pipe 6 can be arranged (see FIG. 3).
  • a cooling pipe 6 as a cooling member is provided in the cooling region S.
  • the molten glass G stored in the feeder 3 is pulled out downward from a plurality of nozzles 5 provided on the base plate 41 of the bushing 4, and a glass fiber (monofilament) Gm is manufactured.
  • the viscosity of the molten glass G at the molding temperature is set in the range of 10 2.0 to 10 3.5 dPa ⁇ s (preferably 10 2.5 to 10 3.3 dPa ⁇ s).
  • the viscosity of the molten glass G at the molding temperature is the viscosity of the molten glass G at the position where it flows into the nozzle 5.
  • a sizing agent is applied to the surface of the glass fiber Gm by an applicator (not shown), and 100 to 10,000 fibers are spun into one strand Gs.
  • the count of the strand Gs depends on the glass fiber Gm to be spun, and the larger the number of glass fibers Gm, the larger the count of the strand Gs.
  • the spun strands Gs are wound around the collet 7 of the winding device as a fiber bundle Gr.
  • the strands Gs are cut into a predetermined length of, for example, about 1 to 20 mm and used as chopped strands.
  • the glass melting furnace 1, the fore hearth 2, the feeder 3, the bushing 4, the nozzle 5, and the cooling pipe 6 are at least partially formed of platinum or a platinum alloy (for example, a platinum rhodium alloy).
  • the feeder 3 and the bushing 4 may be heated by energization heating or the like.
  • the nozzle 5 has a pair of long wall portions (first wall portions) 51 facing each other in the X direction and a pair of short walls facing each other in the Y direction at the tip portion (lower portion). It includes a wall portion (second wall portion) 52, and a flat (oval in the present embodiment) nozzle hole 53 partitioned by a long wall portion 51 and a short wall portion 52.
  • a notch 54 is provided in each long wall portion 51, and a part of the nozzle hole 53 communicates with the external space of the nozzle 5 through the notch 54.
  • the major axis direction of the nozzle hole 53 coincides with the Y direction
  • the minor axis direction of the nozzle hole 53 coincides with the X direction.
  • the X-direction dimension of the short wall portion 52 is shorter than the Y-direction dimension of the long wall portion 51.
  • these dimensional relationships of the wall portions 51 and 52 are not particularly limited.
  • the cross-sectional shape of the nozzle hole 53 may be an elliptical shape or the like as well as an oval shape.
  • the notch 54 provided in each long wall portion 51 of the nozzle 5 has a trapezoidal shape having the same dimensions.
  • the notch 54 has an isosceles trapezoidal shape (upper base) that has a center point T1 of the upper base on the center line M1 of the long wall portion 51 and is symmetrical with respect to the center line M1. Is shorter than the bottom).
  • the internal angle ⁇ 1 is, for example, more than 90 ° to 160 ° (preferably 110 ° to 150 °).
  • the nozzle hole 53 has a flat oval shape and a constant shape in the Z direction. As shown in FIG.
  • the nozzle hole 53 has a ratio (a / b) of the X-direction dimension (minor-diameter dimension) b to the Y-direction dimension (major-diameter dimension) a. It is in the range of 5 to 20 (preferably 3 to 10).
  • the glass fiber Gm having a deformed cross section having a non-circular cross section such as a flat shape can be stably molded. In other words, the variation in the cross-sectional shape of the manufactured glass fiber Gm is reduced.
  • the shape of the base end portion is the shape of the tip portion of the nozzle 5. It may be the same as or different from.
  • nozzles 5 It is preferable that 200 to 10,000 nozzles 5 are arranged on the base plate 41. By arranging the above number of nozzles 5, strands Gs having a large count can be obtained. It is preferable that 1500 or more nozzles 5 are arranged on the base plate 41.
  • the cooling pipe 6 circulates cooling water F as a fluid inside the cooling pipe 6 to exert a cooling action.
  • the cooling pipe 6 is a plate-shaped body, and a plurality of cooling pipes 6 are arranged so that the plate surface thereof follows a certain direction (vertical direction).
  • the cooling pipe 6 is integrally provided in the cooling region S of the base plate 41, but may be provided separately from the bottom of the bushing 4. Further, the cooling pipe 6 may be a circular tubular body. The height position of the cooling pipe 6 can be appropriately adjusted according to the cooling conditions of the molten glass G.
  • the cooling pipe 6 may be arranged above the tip of the nozzle 5 so as not to directly face the molten glass G drawn out from the nozzle 5, or the molten glass G drawn out from the nozzle 5 and the nozzle 5. It may be arranged so as to straddle both of them.
  • the cooling member is not limited to the cooling pipe 6, and may be a cooling fin or the like that induces an air flow to exert a cooling action.
  • a plurality of nozzle rows L1 and L2 are arranged in parallel at intervals in the X direction between adjacent cooling regions S.
  • Each of the nozzle rows L1 and L2 is configured by arranging a plurality of nozzles 5 having the major axis direction of the nozzle holes 53 oriented in the Y direction on the same straight line extending in the Y direction.
  • the cooling pipe 6 is arranged between the nozzle rows L1 and L2 adjacent to each other in the X direction in parallel with the nozzle rows L1 and L2.
  • the nozzle row L1 and the nozzle row L2 are the same except for the arrangement position of the nozzle 5 in the Y direction.
  • the cooling pipe 6 faces the notch 54a of the nozzle 5 adjacent to the cooling pipe 6, and the molten glass G flowing in the nozzle 5 is cooled through the notch 54a. ing. Specifically, at the tip of the nozzle 5, the molten glass G is rapidly cooled from a temperature of 1000 ° C. or higher by the cooling tube 6.
  • the cooling pipe 6 also has a function of cooling the bushing 4 and the nozzle 5 to suppress thermal deterioration thereof and improve durability.
  • the notch 54b of the nozzle 5 not adjacent to the cooling pipe 6 is also included in the adjacent nozzle row (the nozzle row adjacent to the nozzle row L1 is L2, and the nozzle row adjacent to the nozzle row L2 is L1). Since it faces the cooling member 6 through the region of the gap between the nozzles 5, it is possible to prevent the molten glass G from being overcooled. Therefore, the viscosity of the molten glass G at the time of molding can be appropriately adjusted, and the irregular cross-section glass fiber can be stably molded.
  • the molten glass G on the notch 54a side of the nozzle 5 is rapidly cooled because it directly faces the cooling tube 6, and the molten glass G on the notch 54b side of the nozzle 5 is separated from the cooling tube 6 by a predetermined distance. It is cooled more slowly than the molten glass G on the side of the notch 54a in order to face the surface. Therefore, the molten glass G on the notch 54a side is immediately solidified and hardly deformed, while the molten glass G on the notch 54b side is deformable to some extent until it is solidified.
  • the molten glass G is not sufficiently cooled unless the notch 54b of the nozzle 5 which is composed of only the nozzle row L1 and is not adjacent to the cooling pipe 6 faces the cooling member 6.
  • the intervals D1 and D2 are narrower than the width W at the tips of the notches 54a and 54b. Therefore, it is possible to prevent the molten glass G from being overcooled.
  • the distances D1 and D2 between the nozzles 5 are preferably 1 to 10 mm, more preferably 1 to 5 mm. As a result, more nozzles 5 can be arranged on the base plate 41. Further, the width W at the tip of the notch 54 is preferably 2 to 20 mm. The ratio of the width W (W / D (D1, D2)) between the intervals D1 and D2 and the tip of the notch 54 can be, for example, 0.5 to 5, but 1.1 to 2. It is preferably 5.
  • the number of nozzles 5 included in one nozzle row L1 and L2 is preferably 10 to 500 or less.
  • the productivity of the irregular cross-section glass fiber can be improved.
  • the number of glass fibers Gm obtained at one time is increased, and as a result, strands Gs having a large count can be manufactured.
  • one notch 54a directly faces the cooling pipe 6, and the other notch 54b passes through the region of the gap between the nozzles 5 of the second nozzle row L2. Since it faces the cooling pipe 6, it is possible to prevent the molten glass G from being overcooled. Therefore, the viscosity of the molten glass G at the time of molding can be appropriately adjusted, and the irregular cross-section glass fiber can be stably molded.
  • one notch 54a directly faces the cooling pipe 6, and the other notch 54b passes through the region of the gap between the nozzles 5 of the first nozzle row L1. Since it faces the cooling pipe 6, it is possible to prevent the molten glass G from being overcooled.
  • the intervals D1 and D2 between the nozzles 5 are equal, but they may be different.
  • the ratio D1 / D2 of D1 and D2 is preferably in the range of 0.5 to 2.0.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacture, Treatment Of Glass Fibers (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
PCT/JP2021/024145 2020-08-17 2021-06-25 ブッシング及び異形断面ガラス繊維製造方法 WO2022038901A1 (ja)

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Application Number Priority Date Filing Date Title
CN202180050767.3A CN115916714A (zh) 2020-08-17 2021-06-25 漏板及异形截面玻璃纤维制造方法

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JP2020-137363 2020-08-17
JP2020137363A JP2022033465A (ja) 2020-08-17 2020-08-17 ブッシング及び異形断面ガラス繊維製造方法

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010083750A (ja) * 2008-09-03 2010-04-15 Nippon Electric Glass Co Ltd ガラス繊維製造装置および製造方法
JP2010150127A (ja) * 2008-11-20 2010-07-08 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2010163342A (ja) * 2009-01-19 2010-07-29 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2017226579A (ja) * 2016-06-23 2017-12-28 日本電気硝子株式会社 異形断面ガラス繊維製造用ノズル並びに異形断面ガラス繊維製造装置及びその製造方法
JP2018016506A (ja) * 2016-07-26 2018-02-01 日本電気硝子株式会社 異形断面ガラス繊維の製造装置、及びその製造方法
JP2019108262A (ja) * 2017-12-19 2019-07-04 日本電気硝子株式会社 ガラス繊維の製造装置および製造方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010083750A (ja) * 2008-09-03 2010-04-15 Nippon Electric Glass Co Ltd ガラス繊維製造装置および製造方法
JP2010150127A (ja) * 2008-11-20 2010-07-08 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2010163342A (ja) * 2009-01-19 2010-07-29 Nippon Electric Glass Co Ltd ガラス繊維製造装置およびガラス繊維製造方法
JP2017226579A (ja) * 2016-06-23 2017-12-28 日本電気硝子株式会社 異形断面ガラス繊維製造用ノズル並びに異形断面ガラス繊維製造装置及びその製造方法
JP2018016506A (ja) * 2016-07-26 2018-02-01 日本電気硝子株式会社 異形断面ガラス繊維の製造装置、及びその製造方法
JP2019108262A (ja) * 2017-12-19 2019-07-04 日本電気硝子株式会社 ガラス繊維の製造装置および製造方法

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JP2022033465A (ja) 2022-03-02
CN115916714A (zh) 2023-04-04
TW202210429A (zh) 2022-03-16

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