WO2008023627A1

WO2008023627A1 - Bushing for the production of glass continuous filaments, process for production of the bushing, equipment for producing glass continuous filaments and process for the production of the filaments with the equipment

Info

Publication number: WO2008023627A1
Application number: PCT/JP2007/065956
Authority: WO
Inventors: Takashi Aitoku; Narutoshi Shimatani; Shigeaki Aoki; Hitoshi Takemura
Original assignee: Nippon Electric Glass Co., Ltd.
Priority date: 2006-08-23
Filing date: 2007-08-16
Publication date: 2008-02-28
Also published as: CN101506113A; JP5403291B2; JP2012001434A; TW200812926A; CN101506113B

Abstract

[PROBLEMS] To provide a bushing of strong structure which is reduced in the quantity of substance evaporated from the bushing and enables the formation of high-precision glass filaments. [MEANS FOR SOLVING PROBLEMS] A bushing (1) for producing glass continuous filaments (F) by making molten glass (G) flow out through nozzles (6) of a bushing plate (4), wherein a coating film (7) made of a material selected from the group consisting of ceramics, glass-ceramics and glass covers the outside surface of the bushing plate (4) except the outer peripheral surfaces of the nozzles (6) and the end face; a process for the production of glass continuous filaments by producing glass filaments for composite materials with the bushing (1) while watching the outside surface of the bushing plate (4) and the state of spinning; and a process for the production of the bushing (1) which comprises the bushing body formation step of assembling a bushing body (2), the coating step of forming a coating on at least the outside surface of the bushing plate (4) of the bushing body (2), and the baking step of heating the coating to convert it into a dense-structure film.

Description

Specification

Pushing for producing long glass fiber and method for producing the same, glass long fiber producing apparatus and method for producing glass long fiber using the same

Technical field

[0001] The present invention relates to a pushing used for molding a long glass fiber, a manufacturing method for the pushing, a glass long fiber manufacturing apparatus including the pushing as a main component, and a glass length using the apparatus. The present invention relates to a method of manufacturing a fiber, and more particularly to an improvement in outer surface properties of a bushing for manufacturing a long glass fiber.

Background art

[0002] In general, glass fibers are roughly classified into short glass fibers and long glass fibers. Of these, long glass fibers that are surely excluded are short glass fibers. In order to perform molding or spinning, a container with a molding nozzle having a heat resistance called a pushing is used. This bushing is used to form molten glass into a fiber shape. A bushing plate (container body) is formed by fixing a bushing plate to the bottom of the peripheral wall of the bushing. In addition to the molten glass supply space, a large number of nozzles that allow the molten glass to flow out from the molten glass supply space are provided on the bottom side of the pushing plate. Then, by continuously flowing out the molten glass from the multiple nozzles, a large number of glass filaments (long glass fibers) were formed, and a coating agent such as a sizing agent was applied to the surface of the glass filaments. After that, a fiber product having a long glass fiber strength is produced by winding it as a strand with a winder.

[0003] In order to continuously and smoothly manufacture various types of high-quality glass long fibers by the above-described process, a bushing suitable for the performance, shape, dimensions, etc. required for the manufactured glass long fibers is required. Become. For this reason, to date, many inventions have been made regarding the pushing and the nozzles disposed thereon. For example, Patent Document 1 and Patent Document 2 disclose a spinning nozzle tip for producing a long glass fiber having a flattened specific force of 4 or more or a deformed cross-sectional shape of 4 or more. Pushing plate Is softened and deteriorated when held at a high temperature for a long time, and caused drooping deformation due to its own weight or the weight of the molten glass. Patent Document 3 discloses a holding tool for preventing this deformation. Is disclosed. Furthermore, Patent Document 4 discloses an invention that stabilizes heat dissipation performance by providing ring-shaped irregularities on the outer surface of a nozzle. In Patent Document 5 and Patent Document 6, glass that is generated by the oozing of molten glass to the nozzle outer surface by forming grooves and irregularities with a depth of 0.5 to 50 m on the nozzle outer surface. An invention that prevents the cutting of long fibers is also disclosed. Further, Patent Document 7 discloses a glass fiber manufacturing push consisting of at least one layer in which the composition ratio of ceramics and noble metal is changed stepwise on the tip plate of the pushing to prevent volatilization of the noble metal. .

Patent Document 1: JP 2000-335932 A

Patent Document 2: JP 2000-344541 A

Patent Document 3: Japanese Patent Laid-Open No. 02-097433

Patent Document 4: Japanese Patent Laid-Open No. 02-153837

Patent Document 5: Japanese Patent Laid-Open No. 04-083730

Patent Document 6: Japanese Patent Laid-Open No. 04-083731

Patent Document 7: Japanese Patent Laid-Open No. 06-298543

Disclosure of the invention

Problems to be solved by the invention

However, in spite of the fact that the inventions listed above are not sufficient, glass long fibers are widely used in various applications. In recent years, by managing the fiber diameter of long glass fibers with higher accuracy than before, when the long glass fibers are molded for use as a composite material, the strength of the composite material increases. Moreover, it has been found that stable performance can be realized, and a long glass fiber having a higher-precision dimension than in the past has been demanded for many applications. Therefore, research has been conducted on the most suitable pushing for producing such a long glass fiber having such a high-precision dimension. The problems here are the various factors that affect the glass fiber diameter, the force S, and the diameter of the long glass fiber is simply determined by the dimensional accuracy of the hole diameter of the nozzle opening. However, it is affected by various factors such as the deformation of the bushing over time at high temperatures, the evaporation of the material that constitutes the bushing, and the temperature, speed, and atmosphere when the long glass fiber is drawn. For this reason, it is necessary to investigate and improve these factors one by one. The inventors of the present invention have conducted research to improve such problems, and as described in Patent Document 7, in order to adjust the fiber length of the long glass fiber so as to be highly accurate, the structure of the nozzle is used. It is often the case that there are other improvements in terms of dimensions and dimensions, but it is better to focus on the pushing plate area other than the nozzle. Disclosure of new technical ideas

[0005] The present invention makes it possible to form or spin long glass fibers having a high-precision fiber diameter in a high-temperature state for a long period of time by making the pushing with less evaporant due to pushing at a high temperature strong. It is an object of the present invention to make it possible to manufacture long glass fibers for composite materials with excellent quality.

Means for solving the problem

[0006] A bushing for producing long glass fibers according to the present invention, which has been created to solve the above-mentioned problems, has a bushing body having a molten glass supply space therein, and a bushing peripheral wall portion and a bottom portion thereof. The glass length is formed with a pushing plate, and a plurality of nozzles are provided on the bottom side of the bushing plate to allow the molten glass to flow out from the molten glass supply space in order to form a long glass fiber. A fiber molding bushing, excluding the outer peripheral surface and the end surface of the nozzle, and a coating using any one or more of ceramic, glass ceramic and glass material group on the outer surface of the pushing plate. Characterized by the formation.

[0007] According to such a configuration, the outer surface of the pushing plate constituting the pushing body of the bushing for producing a long glass fiber is either ceramic or glass ceramic (also referred to as crystallized glass) or glass. The outer peripheral surface and the end surface of the ladle are attached to the bottom surface side of the pushing plate, while being coated so as to have a film-like appearance by a structural material containing the above materials. That kind of coating is done! [0008] To explain the circumstances leading to the adoption of such a configuration, the present inventors investigated the evaporation of the bushing material from the outer surface of the bushing for producing long glass fibers. Found that not only the evaporation from the nozzle alone but rather the evaporation from the surrounding pushing plate was greatly involved. In addition, it has become clear that the nozzle itself has been able to take appropriate measures due to various improvements so far, and that no other measures have been taken. Therefore, the present invention covers the outer surface of the bushing plate, not the nozzle, by covering a specific portion of the surface with the selected heat-resistant material, so that the pushing plate material from the outer surface of the pushing plate We paid attention to the fact that the long-lasting glass fiber manufacturing bushing, which prevents the evaporation of the material over time in a high-temperature environment and is exposed to a high temperature state for a long time, can maintain a stable state and performance for a long time. .

[0009] Regarding the area of the outer surface of the pushing plate on which the film using one or more of the above materials is formed, it is not always necessary to cover the entire surface, excluding the outer peripheral surface and end surface of the nozzle. Of the area of the exposed surface to the outside of the pushing plate, it is preferable that at least 2 major parts of the damage IJ are covered. In addition, if the covered part need not be a continuous surface, and only the appropriate place that does not need to be gathered in one place is covered, multiple places should be covered so that the part is particularly easy to evaporate. It is preferable to be able to efficiently coat only. Here, the “at least 20% or more of the principal region” means an outer surface that is particularly likely to be in a high temperature state, an outer surface that is weak in structure due to the action of a tensile force, or the most evaporated. An outer surface that satisfies any of the conditions of an outer surface that is known to be severe. Such an outer surface can be obtained by a structural simulation model, or may be obtained by actual measurement such as temperature measurement.

[0010] Here, regarding the material of the pushing plate, the material of the nozzle, and the attachment structure of the nozzle with respect to the pushing plate, the material having the ability to continuously and stably draw out the molten glass in a high temperature state. There is no particular limitation. Also, there is no particular limitation on the method of applying a coating material made of one or more of ceramic, glass ceramic or glass.

[0011] Further, the external shape and dimensions of the nozzle and the pushing plate are not particularly limited. For example, the nozzle shape may be a cylindrical shape, a polygonal cylindrical shape, a frustum-shaped outer shape, a dome-shaped outer shape, or the like, and one or more of ceramics, glass ceramics, or glass is applied to the outer surface thereof. Predetermined grooves, irregularities, dimples, protrusions, and the like can be provided at predetermined intervals or randomly so that a film different from the used film can be easily formed. Further, the surface state of the outer surface can be changed to a surface state having fine undulations by physical means such as sandblasting or various chemical treatments such as acid and alkali. In addition, the bushing plate does not necessarily have to be planar, and the entire pushing plate may be curved, for example, with unevenness or grooves.

[0012] With regard to the arrangement position of a large number of nozzles on the pushing plate, the structure is such that the nozzles are arranged at any position with respect to each other! For example, the unit arrangement of a large number of nozzles may be such that three nozzle positions are arranged in a triangle, or four nozzle positions are arranged in a substantially rectangular shape. It may be a combination of both, or a completely different arrangement

[0013] In addition, the above configuration is a force that covers the outer surface of the pushing plate excluding the outer peripheral surface and the end surface of the nozzle with an appropriate material as described above. It does not intentionally exclude the outer peripheral surface and the end surface of the nozzle. In particular, for example, the outer peripheral surface and the end surface of the nozzle can sufficiently avoid the influence on the glass fiber drawn out in the molten state, and it is more effective to form a coating at such a position. If present, it does not prevent the formation of a film of a material different from the above-described film. However, if it is judged that such a film is easily peeled off, it is better to avoid it!

[0014] On the other hand, the bushing for producing long glass fibers according to the present invention uses the force of one or more of ceramics, glass ceramics, and glass material groups to form a film using one or more of the outer surface of the bushing plate. In addition to the above, the outer surface of the peripheral wall portion of the pushing body, which is a constituent element of the pushing body, may be used. Also in this case, the above-mentioned film may be formed in the entire region of the outer surface of the pushing wall, or the above-mentioned film may be formed in an appropriate partial region, for example, a partial region connected to the pushing plate. . For example, coats are applied to the surfaces of construction parts such as cooling pipes and fins, terminals, and reinforcing members for pushing plates. Force that can be formed The film formed at such a location may have the same material and thickness as the outer surface of the pushing plate, or may have a different structure.

[0015] Further, as for the formation method of the film, if the place where the film is to be formed is only a specific limited place, an organic material or other masking material is previously used for the place where the film is not formed. Then, a film can be formed with the outer surface covered, and then the masking can be removed by a predetermined method to form a film selectively. Alternatively, if necessary, a predetermined assembly process of the pushing plate may be performed first, and a film may be formed only on a desired member during the process.

[0016] On the other hand, the bushing for producing long glass fibers according to the present invention has high! / If the pushing plate is made of a platinum alloy or platinum, and is difficult to react with molten glass at high temperature in addition to heat resistance. Even if it is closed, performance and performance can be maintained, so it is possible to reduce the strength of the outer surface of the pushing plate as well as the change of the inner surface over time, and less deterioration of the inner surface. The production of fibers can be performed efficiently.

[0017] Here, the pushing plate is made of platinum alloy or platinum. The material constituting the pushing plate is platinum, that is, platinum, rhodium, iridium, yttrium, ruthenium, palladium, osmium, titanium, gold, It may contain molybdenum, tungsten, magnesium, calcium, hafnium, zirconium, or the like in an appropriate amount, and the content of these coexisting components is not particularly limited as long as predetermined performance such as heat resistance can be realized. Means that. It goes without saying that platinum alloys and materials other than platinum can be used together to achieve the desired effect. In addition, as a material of the pushing plate according to the present invention, a platinum alloy is not necessarily a solid solution alloy force, a material in which fine particles are dispersed in platinum, or a ceramic material is added and consolidated. It may be in the form of cermet.

[0018] In addition, the pushing for producing long glass fibers according to the present invention has an outer surface and a pushing plate by adjusting various physical properties such as an expansion coefficient and heat resistance within a desired range if the coating has a multilayer structure. In addition to this, it is possible to select materials that are easily adaptable to the interface with the pushing wall. It becomes the power S Kurakura.

[0019] Here, the coating film having a multilayer structure means that the coating film is composed of two or more layers by a plurality of film forming operations.

[0020] The thickness dimensions and components of each layer constituting the multi-layered film can be selected as necessary so as to obtain a preferable component and structure (however, ceramics, glass ceramics or glass can be used). (Limited to coatings using one or more of these). In addition, each layer may have an inclined structure or a stitch structure that does not need to be uniform. In addition, an arbitrary aggregate can be intentionally added to the components constituting the layer. Aggregates that are preferred in terms of heat resistance, expansion coefficient, or reactivity can be used. For example, an appropriate amount of glass filler, ceramics filler, glass ceramics filler, noble metal filler, etc. can be used. Any filler shape can be selected. For example, approximately fiber shape, approximately cotton shape, approximately mesh shape, approximately braided shape, approximately balloon shape, approximately microbead shape, approximately crushed material shape, approximately porous body, approximately polyhedral shape, approximately columnar shape, approximately polygonal column shape, approximately plate Shape, substantially pellet shape, substantially conical shape, substantially polygonal shape, or substantially alphabetical columnar shape.

[0021] Further, when the coating has a multilayer structure, higher performance can be realized by assigning a function specific to each layer. For example, on the surface of the pushing plate, an emphasis is placed on bonding with a pushing plate material such as platinum alloy or platinum, and a dense layer is placed on top of this layer to prevent evaporation from the pushing plate. Alternatively, a layer having a dense structure may be disposed on the surface of the pushing plate itself, and a layer having high heat resistance that does not easily fall off may be employed as an upper layer. In addition, for example, a layer with a specific filler added is arranged so that the thermal expansion coefficient gradually changes, and cracking is suppressed. In addition, the upper layer has heat resistance, and at the same time, the surface force of the pushing plate is efficiently evaporated. It is also possible to employ a noble metal filler that hinders it.

[0022] Although the heat-resistant temperature of the coating film depends on the construction method and the type of construction material, it must have a heat resistance of at least 800 ° C, more preferably 1000 ° C, More preferably, it has a heat resistance of 1200 ° C or higher. In order to realize such heat resistance, it is preferable to perform firing at a temperature higher than that.

[0023] Further, in the bushing for producing a long glass fiber according to the present invention, the film is a preform film, If it is any one of spray coating, dating coating and vapor deposition coating, an optimum configuration can be obtained by selecting a coating suitable for the pushing plate material. A high quality coating can be applied.

[0024] Here, the coating is any one of a preform coating, a spray coating, a dating coating and a vapor deposition coating, except that the outer peripheral surface of the nozzle and the nozzle end surface are removed and applied to the outer surface of the pushing plate. For dating with a pre-adjusted force that is pre-formed by a preform, or a force that is formed by injection using a spray device, and the working surface of the pushing plate It means that it is formed by adopting a force that is formed by dipping in the paste, or a physical or chemical vapor deposition method. ! /

[0025] Regarding these film forming methods, one method may be adopted or a plurality of methods may be used in combination! /. Also, combining these methods with other film forming methods!

[0026] In addition to the above, the bushing for a long glass fiber manufacturing apparatus according to the present invention is preferably a film having a stable structure over a long period of time if it has a film thickness force of S 1 mm or less.

Yes

[0027] Here, the thickness force of the coating is less than mm, the thickness of the coating is measured at the time of construction or after the construction, and the thickness thickness of the coating becomes the maximum measured force S of 1mm or less! /, Means that! / ヽ

[0028] The reason for controlling the thickness dimension of the coating to 1 mm or less is as follows. The first reason is that if the thickness of the thin film exceeds S lmm, peeling between the construction surface and the coating after drying tends to occur. The pushing plate is made of a platinum alloy or platinum as described above, and the platinum alloy or platinum is manufactured with a thickness of 2 mm or less in consideration of the production cost of the bushing for producing glass long fibers. The outer surface of the pushing plate excluding the nozzle outer peripheral surface and end face of the bushing for producing long glass fibers is coated with a coating using one or more of ceramics, glass ceramics and glass material group, and the dried film of the coating When the film has a film thickness of mm or more, it becomes a rigid dry film that does not cause deformation. As a result, when the platinum alloy or platinum, which is the work surface, is slightly deformed during construction, the dry film is removed. Unable to follow the deformation, there is a high risk of peeling. The second is due to the fact that firing shrinkage occurs when a rigid dry film of 1 mm or more is fired. A film with a low density and a film can suppress firing shrinkage, but a film with a high density is essential for a film that prevents the volatilization of platinum. The density of the film can be determined by measuring the porosity. When the porosity is 10% or more, it is difficult to suppress the volatilization of platinum, and desirably 5% or less is required. Increasing the density increases firing shrinkage, and with a film thickness of 1 mm or more, the risk of film cracking during firing increases. Therefore, the thickness dimension of the coating is preferably 1 mm or less as the total thickness of the layer, more preferably 800 in or less, and even more preferably 600,1 m or less, More preferably, it is 400 μm or less.

[0029] As the glass fiber that can be produced by the pushing for producing long glass fiber according to the present invention, any known glass long fiber made of glass can be produced. For example, E glass (non-alkali glass composition), AR glass (alkali resistant glass composition), C glass (acid resistant alkali lime-containing glass composition), D glass (composition realizing low dielectric constant), S glass ( High strength and high elastic modulus), T glass (high strength and high elastic modulus) and H glass (high dielectric constant), or M glass and L glass Even other materials can be used.

[0030] On the other hand, the manufacturing method of the bushing for producing a long glass fiber of the present invention comprises a bushing body forming step of assembling a pushing body comprising a pushing wall and a pushing plate and a number of nozzles, and the assembled pushing body. The bushing for producing long glass fibers according to any one of the above, comprising a coating step for forming a coating on at least the outer surface of the pushing plate and a firing step for heating the formed coating to have a dense structure. Is to be manufactured.

[0031] As for the pushing body forming step, an assembling procedure can be performed by assembling the pushing peripheral wall portion, the pushing plate, and a large number of nozzles so as to form the basic structure of the pushing for producing the long glass fiber described above. It is preferable to set so that a high quality structure can be obtained with optimum efficiency. For example, if all nozzles are preferentially attached to the pushing plate first, the nozzles are attached last. You may go to Various methods known in the art may be employed as the method for attaching the nose.

[0032] In addition, as described above, there are various coating processes for forming a coating on the outer surface of at least the pushing plate (that is, the bushing plate alone, or the pushing plate and the circumferential wall portion of the bushing) of the assembled pushing body. It would be nice if a stable quality push could be constructed by adopting this method.

[0033] For the firing step of heating the formed coating so as to have a dense structure! / In a state where the coating has sufficient durability at the temperature at which the glass fiber is drawn out by the pushing for manufacturing the long glass fiber Therefore, by heating the coating film to a temperature at which the glass fiber is pierced, the coating film can be firmly bonded to the pushing surface.

[0034] As a heating means to be used in the firing process! /, A means for applying a local heating means or a means for heating the whole bushing may be used. An electric furnace or various fuel systems may be used. It may be maintained at an appropriate temperature in the heating furnace, or may be heated by a glass melting furnace heating source after the long glass fiber manufacturing bushing is disposed in the glass melting furnace. Good.

[0035] The heating temperature in the firing step is preferably 1100 ° C to 1500 ° C. This is because if the bushing for producing long glass fibers is heated at a temperature lower than 1100 ° C, the overall heating may be insufficient, or there may be a problem in that some parts may not be heated evenly. This is not preferable because of its properties. On the other hand, heating at a temperature exceeding 1500 ° C. is not preferable because it may result in shortening the life of the coating as a result of imparting overloading thermal energy to the coating. From the above viewpoint, in order to obtain a more stable quality film, the heating temperature in the firing step is more preferably in the range of 1200 ° C to 1400 ° C.

[0036] Further, the long glass fiber manufacturing apparatus according to the present invention is characterized in that the glass long fiber is spun using any one of the above-described pushes for manufacturing long glass fiber.

[0037] The form of the long glass fiber product using the glass filament (glass long fiber) manufactured by the long glass fiber manufacturing apparatus is not particularly limited. In other words, the fiberglass products include yarn, roving, and DWR (direct winding). Globbing), chopped strands, milled fines, cloth, mats, tapes or fabrics.

[0038] In this long glass fiber manufacturing apparatus, in addition to the above, there are various incidental facilities! /, Which can be used with appropriate jigs. For example, a cooling device or jig such as a glass fiber cooling pipe or fin, a device that intentionally adjusts the oxidation-reduction atmosphere around the pushing plate, a cooling medium spraying device for cooling, a temperature adjusting device for the pushing plate, etc. is there. These devices and jigs can be used alone or in combination, and do not impede the use of other devices.

[0039] On the other hand, the method for producing glass long fibers according to the present invention produces glass long fibers for composite materials while monitoring the outer surface of the pushing plate and the spinning state using the above glass long fiber production apparatus. It is characterized by doing.

[0040] A specific example for producing a glass long fiber for a composite material while monitoring the outer surface of the pushing plate and the spinning state using the above glass long fiber production apparatus will be described. Was placed in a glass melting furnace that melts molten glass in a high temperature state, so that the molten glass that flowed out of the glass melting furnace was introduced into the glass long fiber manufacturing apparatus, and was attached to the pushing plate of the glass long fiber manufacturing apparatus. When glass fiber is produced by continuously pulling out from the nozzle, production is performed while monitoring whether the glass fiber is smoothly drawn out and spun smoothly outside the pushing plate. This is because it is possible to observe the pushing plate at the same time as observing the glass fiber, and it is necessary to deal with some kind of countermeasure, for example, if there is foreign matter adhesion or fragile spots on the outer surface. Corrective actions can be taken promptly.

[0041] Here, various methods can be adopted for monitoring the spinning surface of the outer surface of the pushing plate and the long glass fiber. For example, a digital or analog image as a moving image of the outer surface of the pushing plate and the spinning state or an intermittent still image via a wired or wireless intranet line via an imaging device equipped with a solid-state imaging device such as an imaging tube or CCD or CM OS It is also possible to transmit information to a recording device and monitor it, and to measure the dimensional fluctuation and temperature fluctuation of a predetermined point that requires attention by an electronic recording system of visible light and other electromagnetic waves instead of images. Value to day It can be recorded on the play sheet, recording paper, or recording medium, and monitored by a visual monitoring program.

[0042] In addition, the method for producing a long glass fiber according to the present invention is a glass long fiber product suitable for various applications as long as it is any of the above-mentioned glass long fiber forces for composite materials, SFRP, FRTP and GRC. High quality can be achieved over a long period from the beginning of production, and production costs can be reduced by improving manufacturing efficiency.

[0043] In this case, if the long glass fiber for composite material is any of FRP, FRTP, and GRC applications, the long glass fiber for composite material may be a thermosetting resin reinforced body (also referred to as FRP) or It can be used as a heat-softening resin cured product (also referred to as FR) or a glass long fiber product constituting an alkali-resistant glass fiber reinforced cement product (also referred to as GR).

[0044] When constituting these long glass fibers for composite materials, the mixing ratio and mixing method of the glass fibers for composite materials according to the present invention, and further, what are the constituent components other than the glass fibers for composite materials according to the present invention? As long as the desired performance such as mechanical strength, chemical durability or heat resistance, chemical resistance, or weather resistance can be realized, add any material. It is possible.

[0045] Further, in the method for producing a long glass fiber according to the present invention, various surface coating agents can be applied to the surface of the glass fiber immediately below the pushing by various methods. For example, a sizing agent, an antistatic agent, a surfactant, a polymerization initiator, a polymerization inhibitor, an antioxidant, a film-forming agent, a coupling agent, or a lubricant may be coated. , Fluidizers, thickeners, waterproofing agents, antifungal agents, curing accelerators, curing retarders, slag, fly ash, silica fume, colorants or quick setting agents may be mixed.

[0046] The glass fiber produced by the method for producing a long glass fiber according to the present invention is not particularly limited with respect to the fiber diameter of the monofilament constituting the strand and the fiber cross-sectional shape. In other words, it is possible to use monofilament glass fibers with a diameter of several meters to several tens of meters, and it is possible to appropriately adopt a perfect circle, a substantially ellipse, a flat circle, a hollow circle, or a substantially rectangular shape as a cross-sectional shape. It is.

[0047] Further, the glass fiber product produced by the method for producing a glass long fiber according to the present invention is specific. For example, it can be used for various applications such as: For example, in automotive applications, car roof materials (roof materials), window frame materials, car body fronts, car bodies, lamp houses, air spoilers, fender grills, tank trolleys, ventilators, water tanks, waste tanks, seats, noses There are cones, fender grilles, curtains, filters, air conditioner ducts, muffler filters, dash panels, fan blades, radiator tires or timing belts, etc. For electronics related applications, electronic housing materials, gear tape liners, various storage cases , Optical component packages, electronic component packages, switch boxes or insulation supports, etc. For aircraft-related applications, engine covers, air ducts, seat frames, containers, curtains, interior materials, service trays, tires, anti-vibration materials There are also timing belts, etc., for motorboats, yachts, fishing boats, domes, buoys, marine containers, floaters, tanks, traffic lights, road signs, curve mirrors, containers, pallets, guardrails, lamp covers, etc. There are spark protection sheets, etc. for construction, civil engineering and building materials, bathtubs, bath toilet units, toilets, septic tanks, water tanks, interior panels, capsules, valves, knobs, wall reinforcements, precast concrete boards, flat plates, corrugated sheets Tents, shutters, exterior panels, sashes, piping pipes, reservoirs, pools, roads, structure side walls, concrete formwork, turbolin, waterproof linings, curing sheets or insect screens. Silo tank, spray nozzle, prop, lini For industrial facilities, bag filters, sewer pipes, water purification equipment, anti-vibration concrete reinforcement (GRC), water storage tanks, belts, chemical tanks, reaction tanks, containers, fans, There are ducts, corrosion-resistant linings, valves, refrigerators, trays, freezers, troughs, equipment parts, motor covers, insulation wires, transformer insulation, cable cords, work clothes, curtains, evaporation panels or equipment housings. Applications include fishing rods, skis, archery, golf clubs, pools, force gnu, surfboards, camera housings, helmets, impact protection armor, flower pots or display boards.In daily goods related applications, tables, chairs, beds, There are benches, mannequins, trays with trash cans, and mobile phone protection materials.

Further, in the method for producing a long glass fiber according to the present invention, the monitoring of the spinning state is based on one or more of the followings: taking a spinning image, measuring the spinning speed, and measuring the fiber diameter. Features.

[0049] According to such a configuration, an image showing the state of the outer surface of the glass fiber continuously drawn out from the nozzle of the long glass fiber manufacturing bushing, the drawing speed from the glass fiber nozzle, And the spinning status can be monitored by any one of the measurements of the fiber diameter of each long glass fiber.

[0050] Regarding the spinning image shooting, a plurality of glass fiber bundles may be simultaneously shot, or a predetermined number of monofilaments may be shot separately by different shooting devices. If such information can be obtained, preferable conditions can be selected for the resolution, shooting frequency, etc. according to the shooting environment and the shooting device.

The invention's effect

[0051] (1) As described above, the bushing for producing long glass fiber according to the present invention forms glass long fiber (glass filament) by allowing molten glass to flow out from a large number of nozzles attached to the pushing plate. In addition, the outer surface of the bushing plate (including the outer surface of the bushing peripheral wall in some cases) except for the outer peripheral surface and the end surface of the nozzle is made of ceramic, glass ceramics, and glass material group. As a result, a film using one or more is formed, so that the amount of evaporant generated from the outer surface of the pushing during the production of long glass fibers can be suppressed, and the force and pushing are strong. Therefore, it is possible to achieve high productivity and high productivity in the production of glass fibers used in various applications.

[0052] (2) Furthermore, in the bushing for producing long glass fibers according to the present invention, if the pushing plate is made of a platinum alloy or platinum, the heat resistance is high and dimensional deformation or the like hardly occurs in the long term. Therefore, it is possible to produce highly accurate glass fibers having high dimensional stability.

[0053] (3) Further, the bushing for producing long glass fibers of the present invention can have various performances required for the outer surface of the bushing in each layer structure of the coating if the coating has a multilayer structure. Since the performance required for each layer is relaxed, it becomes easy to form a stable layer structure. [0054] (4) Further, in the bushing for producing a long glass fiber of the present invention, if the coating is any one of a preform coating, a spray coating, a dating coating and a vapor deposition coating, the structure, dimensions and the size of the pushing plate An optimum film can be formed by a film formation method suitable for the surface condition. The coating method can also be selected depending on the type of coating material.

[0055] (5) Further, the bushing for a long glass fiber production apparatus of the present invention is integrated with the pushing plate so that the coating is cracked or peeled off if the thickness of the coating is 1 mm or less. Since it has a strong structure, it can be used for a long time.

[0056] (6) The method for producing a bushing for producing long glass fibers of the present invention comprises: a pushing body for assembling a pushing body comprising a peripheral wall portion of the pushing, a bushing plate, and a number of nozzles; and the assembled pushing It has a coating process for forming a coating on the outer surface of at least the pushing plate of the main body and a firing process for heating the formed coating to a dense structure. It can be formed in a continuous state on the outer surface of the bushing, and it can be configured to reliably suppress evaporation from the outer surface of the bushing. A push for producing long glass fibers capable of improving the quality can be obtained.

[0057] (7) Since the apparatus for producing long glass fibers of the present invention is configured to spin the long glass fibers using the above-described pushing for producing glass fibers, various kinds of excellent quality are provided. The long glass fiber product can be obtained.

[0058] (8) The method for producing a long glass fiber of the present invention is a method for producing a long glass fiber for a composite material while monitoring the outer surface of the pushing plate and the spinning state using the above-described apparatus for producing long glass fiber. Therefore, stable and efficient production can be maintained, and defects generated in the long glass fiber products due to foreign matters can be minimized.

[0059] (9) Further, the method for producing a long glass fiber according to the present invention is a glass fiber for various uses required from a factory if the glass fiber for composite material is any one of FRP, FRTP and GRC. It can supply fiber reinforced products to lubrication with excellent quality and without any delay.

[0060] (10) In the method for producing a long glass fiber of the present invention, the spinning status is monitored and a spinning image is taken. Information on how to measure the minimum speed of various problems that may occur during glass manufacturing if it depends on one or more of the measurement of spinning speed and fiber diameter. The quality of the glass fiber in the most stable quality state can be maintained for a long time by promptly taking appropriate measures.

Brief Description of Drawings

[0061] FIG. 1 is a perspective view showing an embodiment of a pushing provided in a glass long fiber manufacturing apparatus according to the present invention.

FIG. 2 is a bottom view showing an embodiment of a pushing provided in the apparatus for producing long glass fibers according to the present invention.

FIG. 3 is an enlarged longitudinal sectional front view showing a main part of an embodiment of a bushing provided in the long glass fiber manufacturing apparatus according to the present invention.

Explanation of symbols

[0062] 1 Pushing for long glass fiber production

2 Pushing body

3 Pushing wall

4 Pushing plate

5 Molten glass supply space

6 nozzles

7 Coating

G Molten glass

F long glass fiber (glass filament)

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, an embodiment of a glass long fiber manufacturing push (hereinafter simply referred to as “pushing”) according to the present invention will be described with reference to the drawings.

[0064] FIGS. 1 to 3 illustrate the pushing 1 provided in the long glass fiber manufacturing apparatus. FIG. 1 is a perspective view showing the main part of the pushing 1, and FIG. FIG. 3 is an enlarged vertical front view showing only the periphery of the nozzle of the pushing 1. As shown in Figures 1 and 2, this pushing 1 is a glass of E glass composition used for FRP applications. It is used when molding (or spinning) long fiber. The pushing body 2 of the pushing 1 is configured by fixing a pushing plate 4 to the bottom of the pushing wall 3 and the inside is a molten glass supply space 5 (see FIG. 3). More specifically, the bushing plate 4 is made of a platinum rhodium alloy having a substantially rectangular shape, and 2000 heat resistant nozzles 6 are attached to the bottom surface of the bushing plate 4 and the bottom end of the bushing peripheral wall portion 3. The outer peripheral end surface of the pushing plate 4 is joined to the inner peripheral surface by TIG welding.

[0065] Then, on the outer surface of the pushing plate 4 and the outer surface of the pushing peripheral wall portion 3, there are portions corresponding to 40% of the total area (portions with cross-hatching in FIGS. 1 and 2). A film 7 consisting of two layers is formed. The two-layer coating 7 has a heat resistance of 1300 ° C., and the dense layer corresponding to the first layer is composed of a non-alkali glass powder composition mixed with silica fine powder and alumina powder. Thus, it has a dense layer structure that can effectively block the evaporation of platinum and rhodium from the pushing plate 4, and its thickness dimension is 200 m. In addition, the heat-resistant high-strength layer corresponding to the second layer of the coating 7 contains ceramic fiber and is a composite constituent layer containing alkali-free glass powder, and the thickness dimension of the layer is 100 m. . This heat-resistant and high-strength layer is blended so as to suppress cracking of the coating surface. Then, the coating film 7 composed of two layers applied to the pushing plate has a thickness of 300 m in total of the first layer and the second layer.

[0066] For the part where the coating 7 having a two-layer structure is formed, avoid the vicinity of the nozzle 6 on the end surface of the platinum rhodium alloy nozzle 6 and its outer peripheral surface and the outer surface of the pushing plate 4, specifically, From the position corresponding to the boundary with the nozzle 6 on the outer surface of the pushing plate 4 to the point having a dimension of 1 mm or more, avoid the formation of the coating 7, and the other outer surface of the pushing plate 4 and the peripheral wall 3 of the pushing 3 A film 7 is formed on a predetermined portion of the outer surface of the film. The film 7 is formed in such a manner that the evaporant force from these locations in the previous investigations is cooled by the fins (not shown) around the pushing plate 4 and the cooling pipe (not shown) and cooled. This is because it has been found that accumulation in the vicinity may adversely affect the molding of the glass fiber F! /. In addition, if the coating film 7 is formed on the end face of the tip of the nozzle 6, even if there is no problem at the beginning of the production, the long glass fiber F can be produced over a long period of time! Glass filament This is because it may adhere to the fiber F and cause thread breakage in the glass fiber F due to this.

[0067] Then, the first layer of the coating 7 is not coated! /, The portion is masked with a masking tape such as an organic film and formed by spray coating, and the second layer is the first layer. It is formed by spraying by using a spray from above.

[0068] Regarding the manufacturing procedure of the pushing 1 having the above configuration! /, First, the pushing plate 4 with the nozzle 6 attached first and the pushing peripheral wall 3 are welded, and the pushing body 2 is assembled. After passing through the pushing body forming process, the coating 7 is equivalent to 40% of the total area of the outer surface of the pushing plate 4 and the pushing wall 3 so that the pushing body 2 has the two-layer structure described above. A coating process is performed to form the part. Next, after the bushing 1 in the state in which the coating 7 is formed is incorporated into the glass fiber manufacturing apparatus, the heating apparatus attached to the glass fiber manufacturing apparatus is used to reach a high temperature state of 1300 ° C. By evenly heating the bushing 1 until the film 7 is densified as a whole and the firing process is performed to improve the adhesion, it is possible to obtain a highly stable film structure with the force S. .

[0069] Next, a method for producing a long glass fiber having an E glass composition for FRP using a long glass fiber manufacturing apparatus having the pushing 10 having the above-described configuration will be described.

[0070] First, a glass raw material prepared to have an E glass composition is charged into a glass melting furnace using a raw material charging machine. The glass raw material introduced in this way is heated to 1300 ° C or higher by a heating source such as electricity or fuel gas in a glass melting tank to cause a vitrification reaction, and a heterogeneous rough entrainment including a large number of reactive bubbles. It becomes a molten glass in a molten state. This coarse molten glass is adjusted so that it becomes a molten glass G in a homogeneous state by a series of homogenization operations such as clarification and agitation, and then the homogeneous molten glass G is forged in the glass melting furnace. After that, it flows into the molten glass supply space 5 of the pushing 1!

[0071] The molten glass G that has flowed into the molten glass supply space 5 of the bushing 1 stays in the molten glass supply space 5, and is then attached to the bushing plate 4 adjusted to an appropriate temperature by a heating device or the like. By being continuously drawn out as a thin stream of molten glass without interruption from the opening hole at the tip of 2000 nozzles having heat resistance of 2000 The glass filament F has a diameter of several meters to several tens of πι. Here, the spinning status (molding status) of the glass filament F directly under the nozzle 6 and the outer surface status of the pushing plate 4 are not only monitored regularly by a dedicated monitor, but also The part is photographed with a CCD camera, and the photographed image can be monitored in other monitoring rooms as needed by the factory LAN. This kind of monitoring system makes it possible to respond to any problems that occur in the continuously drawn glass filament (glass monofilament) F. If necessary, the image from the CCD camera can also be recorded, and it can be used for high-quality molding.

[0072] The glass filament F drawn out from the nozzle 6 is rapidly reduced in temperature by a cooling fin or a cooling pipe immediately below the nozzle 6 to become a glass fiber having an E glass composition. A sizing agent is applied to the surface to form a strand of tens to thousands bundles, which are wound around a paper tube to form a cake (also called roving) or cheese. It becomes.

[0073] Thereafter, it is possible to cope with various glass long fiber products by further processing the glass long fibers as required by the glass long fiber manufacturing apparatus. For example, in the case of glass roving, unwinding a plurality of strands from a plurality of cakes after drying and aligning them with a twill, and winding them up using a winder having a winder It is manufactured to have a shape (also called a roll or a wound body).

[0074] When glass fiber for various uses is produced using the glass long fiber production apparatus provided with the pushing 1 as described above, evaporation from the pushing plate 4 is efficiently suppressed, and further the pushing plate Since the high strength of 4 itself can be maintained, the lifetime of the glass fiber manufacturing equipment will be longer than before, enabling efficient production and providing excellent performance with stable quality. It is possible to produce various long glass fibers for composite materials.

Industrial applicability

[0075] The pushing and glass long fiber manufacturing apparatus according to the present invention and the glass long fiber manufacturing method using these are used for other purposes besides the use for composite materials such as FRP. It can also be applied to the production of long glass fibers and can be used in a wide range of fields. In addition, the present invention can be applied to other glass materials as long as they are manufactured using a manufacturing apparatus having the same form as the glass fiber manufacturing apparatus according to the present invention.

Claims

The scope of the claims

[1] A pushing body having a molten glass supply space therein is formed including a pushing wall and a pushing plate disposed at the bottom thereof, and glass long fibers are disposed on the bottom side of the pushing plate. A glass long fiber molding bushing provided with a number of nozzles for allowing molten glass to flow out of the molten glass supply space for molding,

Except for the outer peripheral surface and end surface of the nozzle, a film using one or more of ceramic, glass ceramics, and glass material group is formed on the outer surface of the pushing plate. Pushing for long glass fiber production.

[2] The push for producing long glass fibers according to claim 1, wherein the coating is formed on an outer surface of the peripheral wall portion of the pushing.

[3] The pushing for producing a long glass fiber according to claim 1 or 2, wherein the pushing plate is made of a platinum alloy or platinum.

[4] The pushing for producing a glass long fiber according to any one of [1] to [3], wherein the coating film has a multilayer structure.

[5] The glass long fiber manufacturing block according to any one of [1] to [4], wherein the coating is any one of a preform coating, a spray coating, a dating coating, and a vapor deposition coating.

[6] The bushing for producing a long glass fiber according to any one of [1] to [5], wherein the thickness of the coating is 1 mm or less.

[7] A manufacturing method for manufacturing the long glass fiber manufacturing bushing according to any one of claims 1 to 6, wherein the bushing is composed of the pushing wall and the pushing plate and a plurality of nozzles. A main body forming step, a coating step for forming a coating on the outer surface of at least the pushing plate of the assembled main body, and a firing step for heating the formed coating to have a dense structure. A method for producing a bushing for producing long glass fibers.

[8] An apparatus for producing long glass fibers, characterized in that the long glass fiber spinning is performed using the pushing for producing long glass fibers according to any one of claims 1 to 6.

[9] A glass long fiber for composite material is produced using the glass long fiber production apparatus according to claim 8 while monitoring the outer surface of the pushing plate and the spinning state of the glass long fiber. A method for producing long fibers.

10. The method for producing a long glass fiber according to claim 9, wherein the long glass fiber for composite material is used for FRP, FRTP, or GRC.

[11] The long glass fiber according to claim 9 or 10, wherein the monitoring of the spinning state is based on one or more of photographing image of spinning image, measurement of spinning speed and measurement of fiber diameter. Manufacturing method.