Patent ID: 12202760

DETAILED DESCRIPTION

In order to make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the following clearly and completely describes the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some rather than all of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts should fall within the protection scope of the present application. It should be noted that without conflict, the embodiments in the present application and features in the embodiments may be combined with each other.

In the production process of flat cross-section glass fibers, the production equipment and processes for the flat cross-section glass fibers in the industry are different. In a production device, a plurality of grooves are arranged on a lower surface of a bushing. A cross-section of each groove is V-shaped, U-shaped or semi-circular. Each groove is provided with a plurality of pairs of nozzles arranged at intervals. These pairs of nozzles are adjacent to each other and symmetrically arranged relative to a central axis of the groove. The molten glass in a molten state flows out from ports of a pair of nozzles and is drawn into glass filaments. However, the above production device has the following problems: When a spacing between the two nozzles in a pair of nozzles is small, the two glass filaments are easily drawn into one glass filament, and the cross-sectional shape of the glass filament is similar to a circle; when a spacing between the two nozzles in a pair of nozzles is large, it is difficult for the two glass filaments to abut against each other in the drawing process, resulting in the formation of two glass filaments with circular cross-sections, which is not conducive to the formation of flat glass fibers; and in addition, the nozzle in the production device also has the problems of complex structure, unfavorable processing and short service cycle.

In another production device, by symmetrically arranging a plurality of protruding edges at a lower part of the nozzle, the molten glass in the molten state extends near the protruding edges, and is quenched and hardened in the direction perpendicular to a protruding edge and parallel to an axis line of the nozzle, so as to produce non-circular glass fibers with an oval or cocoon-shaped cross section. However, in the process of producing oval or cocoon-shaped cross-section glass fibers, the protruding edge of such nozzle is easily damaged, resulting in frequent replacement of the bushing.

In yet another production device, notches are arranged symmetrically on both sides of a long axis direction of the nozzle, and then the molten glass on both sides is cooled through a cooling medium. With this design, although the molten glass on both sides can be rapidly cooled and crystallized, which is conducive to the formation of the flat cross-section glass fibers, there is still the problem that the nozzle is easily damaged, which greatly reduces the service life of the bushing.

Alternatively, in an existing nozzle for producing glass fibers, the hole is in a rectangular shape, and the hole is further divided into an upper portion and a lower portion. A length of the upper portion is the same as that of the lower portion, and a width of the lower portion is greater than that of the upper portion. However, since the nozzle and the bushing are usually integrally formed, such a structure with a small top and a large bottom is very difficult to process, and the size controllability of the produced glass fibers is poor.

In a glass fiber nozzle of the present application, a hole is provided on the nozzle body, and the hole includes an upper hole portion and a lower hole portion that are connected in sequence. A projection of the lower hole portion is located within a projection of the upper hole portion in a projection on a plane perpendicular to an axis line of the lower hole portion. On the one hand, this method of large top and small bottom is more conducive to the processing of the nozzle structure, ensuring the processing accuracy and improving the processing efficiency. On the other hand, the viscosity of the molten glass is increased through the upper hole portion, and the lower hole portion has an aspect ratio of 5:1 to 12:1, such that an aspect ratio of glass fibers produced through the nozzle structure is maintained between 2.7:1 and 4.2:1. The smaller lower hole portion is more conducive to the size control of the glass fibers, thereby effectively improving the performance of the flat glass fibers.

A glass fiber nozzle structure provided according to the present application will be described in detail below with reference to the accompanying drawings.

FIG.1exemplarily shows a schematic structural diagram of a glass fiber nozzle structure of the present application.

According to an exemplary embodiment, as shown inFIG.1toFIG.4, a glass fiber nozzle structure100provided by the present embodiment includes a nozzle body1and a hole2, and the hole2is provided on the nozzle body1.

Exemplarily, the hole2includes an upper hole portion21and a lower hole portion22. The lower hole portion22is communicated with the upper hole portion21, and the lower hole portion22is located below the upper hole portion21. Molten glass enters the hole2from a top surface of the upper hole portion21and then flows out from the lower hole portion22. In order to make the molten glass form flat glass fibers that meet usage requirements, the cross-section of the lower hole portion22is set to an elongated structure, and a ratio of a length to a width of the lower hole portion22is set to 5 to 12. It should be noted that the elongated shape refers to a structure whose sizes in one direction are greater than those in other directions.

A projection of the lower hole portion22is located within a projection of the upper hole portion21in a projection on a plane perpendicular to an axis line of the lower hole portion22, such that a volume of the upper hole portion21is greater than that of the lower hole portion22. For example, when the upper hole portion21is straight, the projection is a circle, and at this time, the projection of the lower hole portion22is located within the circle. For another example, when the upper hole portion21is tapered, the projection is a ring, and the projection of the lower hole portion22is located in the ring. With this design, the flow rate of the molten glass entering the upper hole portion21is greater than the flow rate of the molten glass flowing out from the lower hole portion22. The molten glass is preliminarily cooled in the upper hole portion21to increase the viscosity of the molten glass, and then flows out from the lower hole portion22, thereby facilitating the subsequent formation of the flat glass fibers.

In the glass fiber nozzle of the present application, the hole2is provided on the nozzle body1, and the hole2includes the upper hole portion21and the lower hole portion22that are connected in sequence. A projection of the lower hole portion22is located within a projection of the upper hole portion21in a projection on a plane perpendicular to an axis line of the lower hole portion22. On the one hand, this method of large top and small bottom is more conducive to the processing of the nozzle structure, ensuring the processing accuracy and improving the processing efficiency. On the other hand, the viscosity of the molten glass is increased through the upper hole portion21, and the lower hole portion22has an aspect ratio of 5 to 12, such that an aspect ratio of glass fibers produced through the nozzle structure100is maintained between 2.7 and 4.2. The smaller lower hole portion22is more conducive to the size control of the glass fibers, thereby effectively improving the performance of the flat glass fibers.

In addition, in the present application, only one lower hole portion22for discharging the molten glass is provided in one nozzle structure100. By controlling the aspect ratio of the lower hole portion22and matching the larger upper hole portion21, the molten glass is discharged to form glass fiber, which is convenient for processing and can ensure the performance of the produced glass fibers.

Exemplarily, with reference toFIG.2andFIG.3, the nozzle body1includes a first body11and a second body12which are connected. The second body12protrudes from a lower surface of the first body11. The materials of the first body11and the second body12may be the same or different. In some embodiments, the first body11and the second body12are made of the same material and integrally formed to reduce the production cost of the nozzle body1and improve the production efficiency of the nozzle body1.

Exemplarily, with reference toFIG.1toFIG.4, when the hole2is in use, the upper hole portion21and the lower hole portion22are arranged in upper and lower positions, that is, the molten glass enters the hole2from the upper hole portion21and flows out from the lower hole portion22. The upper hole portion21is provided in the first body11, and the lower hole portion22is at least partially located in the second body12.

The second body12has a predetermined wall thickness. In some embodiments, the predetermined wall thickness of the second body12ranges from 0.8 mm to 1.4 mm. In the actual production process of glass fibers, when the wall thickness of the second body12is small, for example, less than 0.8 mm, the second body12is easily damaged in the drawing process of the glass fibers. When the wall thickness of the second body12is large, for example, greater than 1.4 mm, it is not conducive to the heat dissipation of the glass fibers in the drawing process, and it is also not conducive to the formation of flat glass fibers that meet the usage requirements. Therefore, in the present embodiment, the preset wall thickness of the second body12is designed to be between 0.8 mm and 1.4 mm, which not only ensures that the second body12is not damaged in the continuous drawing process of the glass fibers, but also facilitates the processing and production, which is conducive to the heat dissipation of the glass fibers, thereby ensuring the flatness ratio of the glass fibers and improving the use performance of the glass fibers.

In some embodiments, as shown inFIG.1toFIG.4, the lower hole portion22is formed inside the second body12, and a wall thickness of a hole wall of the lower hole portion22formed by the second body12gradually decreases from top to bottom. It should be noted that the cross-sectional shape of the second body12may include an elongated shape or an oblong shape, which facilitates subsequent cooling of the produced glass fibers, and also reduces the production cost of the nozzle body1.

That is, taking a plane parallel to a top surface of the first body11as a cross-section, the cross-sectional area of the second body12is a tapered structure in a first direction. The first direction can be understood as an extension direction from an end of the second body12connected to the first body11to an end of the second body12away from the first body11, such as an X direction inFIG.1. The direction can also be understood as an extension direction from top to bottom. It should be noted that the cross-sectional area of the second body12is designed as a tapered structure, such that when the molten glass passing through the nozzle structure flows out of the hole2, the cooling medium passing through the nozzle structure, such as cooling liquid, can perform a cooling process with an increasing cooling effect on the molten glass in the first direction, and the molten glass is rapidly cooled, so as to avoid the influence of the high temperature molten glass on the service cycle of the nozzle structure.

In some embodiments, with reference toFIG.2toFIG.4, the lower hole portion22is straight, and an outer contour shape of a cross-section of the second body12gradually decreases from top to bottom, such that the wall thickness of the hole wall of the lower hole portion22formed in the second body12gradually decreases as described in the above embodiment, so as to improve the reliability of the structure, and ensure the forming quality of the glass fibers while cooling the glass fibers.

In some embodiments, the upper hole portion21has an elongated cross-section, and an extension direction of the cross-section of the upper hole portion21is the same as that of the cross-section of the lower hole portion22provided in the second body12. Designing the upper hole portion21into an elongated shape, such as a rectangle, can improve the arrangement density of the nozzle structures on the bushing formed subsequently, thereby improving the production efficiency.

In a specific embodiment, the lower hole portion22in the second body12is arranged opposite to the upper hole portion21provided in the first body11, that is, the axis line of the upper hole portion21and the axis line of the lower hole portion22coincide, which facilitates the processing and production of the nozzle structure100on the one hand, and makes the molten glass flow through the hole2more smoothly on the other hand.

In another specific embodiment, a length and width of the cross-section of the upper hole portion21have a ratio of 5:1 to 8:1. The setting of the aspect ratio of the upper hole portion21can effectively ensure the production requirements of the flatness of the glass fibers produced on the one hand, and can also ensure the volume of the upper hole portion21on the other hand, such that the molten glass flowing through the upper hole portion21is preliminarily cooled in the upper hole portion21to increase the viscosity of the molten glass, so as to facilitate subsequent production of the flat glass fibers.

As shown inFIG.1andFIG.2, in some embodiments, taking a plane parallel to the top surface of the first body11as a cross-section, the cross-sectional area of the upper hole portion21is tapered. Since the viscosity of the molten glass is gradually increased in the process of flowing from top to bottom, it is designed so that the upper hole portion21is shaped like a funnel, the upper hole portion21of this structure facilitates the downward flow of the molten glass, and the molten glass flows out stably from the lower hole portion22to avoid the phenomenon of bubbles and the like inside the molten glass in the flowing process, so as to ensure the usage requirements of the glass fibers.

As an example, an inner wall surface of the upper hole portion21includes two opposite elongated inclined surfaces and conical surfaces respectively connecting two ends of the two elongated inclined surfaces. The elongated inclined surface is inclined from top to bottom in the direction of the central axis of the upper hole portion21, and the radius of the conical surface gradually decreases from top to bottom. This design makes the glass fibers flow more smoothly and further improves the product quality of the glass fibers.

With reference toFIG.1toFIG.4, in some embodiments, the upper hole portion21has a height of 0.8 mm to 1.4 mm. The upper hole portion21within this height range is convenient for processing and production, and can effectively ensure the service cycle of the nozzle structure100and the bushing formed subsequently and reduce the replacement frequency of the bushing. It should be noted that in the present embodiment, the cross-sectional shape of the upper hole portion21may include an elongated shape or an oblong shape. The upper hole portion21with an elongated or oblong cross-sectional shape can increase the volume of the upper hole portion21to ensure that a suitable volume of molten glass is stored in the upper hole portion21, thereby ensuring the subsequent continuous production of the flat glass fibers.

As shown inFIG.1toFIG.4, at least part of the lower hole portion22is provided in the second body12. The lower hole portion22is communicated with the upper hole portion21, and the lower hole portion22is located below the upper hole portion21. The molten glass enters the hole2from the top surface of the upper hole portion21and then flows out from the lower hole portion22. In order to make the molten glass form the flat glass fibers that meet usage requirements, the cross-section of the lower hole portion22is set to an elongated structure, and a ratio of a length to a width of the lower hole portion22is set to 5:1 to 12:1. It should be noted that in other embodiments, the cross-sectional shape of the lower hole portion22may also include an oblong shape, which is convenient for processing and production, and is convenient for forming the flat glass fibers according to the setting of the aspect ratio of the lower hole portion22.

With reference toFIG.2andFIG.3, in some embodiments, the lower hole portion22includes an inlet and an outlet. The inlet is communicated with the upper hole portion, and the outlet is configured for outflow of the molten glass. In an embodiment, the outlet of the lower hole portion22has a length between 6 mm and 8 mm and a width between 0.6 mm and 1.2 mm. With this design, when the size of the outlet of the lower hole portion22is within the above range, the cross-section of the glass fibers produced has a length of 21 μm to 40.5 μm and a width of 5 μm to 15 μm. Therefore, an aspect ratio of the cross-section of the glass fibers is maintained between 2.7 and 4.2, thereby meeting the usage requirements for the flat glass fibers in subsequent composite materials.

It should be noted that in some specific embodiments, a length and a width of the cross-section of the lower hole portion22have a ratio of 6:1 to 10:1, so as to facilitate the continuous production of the flat glass fibers. Since the cross-sectional area of the upper hole portion21is greater than that of the lower hole portion22, the flow process of the molten glass from top to bottom is smoother, avoiding the phenomenon of frequent fiber breakage caused by insufficient supply of the molten glass.

In some embodiments, the lower hole portion22has a height of 0.8 mm to 1.6 mm. The lower hole portion22in this height range can keep the thickness of the subsequent bushing within a predetermined range, which can effectively reduce the processing difficulty of the nozzle structure100and the bushing, ensure the service cycle of the nozzle structure100, facilitate the continuous production of the flat glass fibers, and reduce the replacement frequency of the bushing.

As shown inFIG.1toFIG.3, in some embodiments, the upper hole portion21has a volume 2 to 5 times that of the lower hole portion22. When a ratio of the volume of the upper hole portion21to the volume of the lower hole portion22is less than 2, the difference between a rate at which the molten glass flows through the upper hole portion21and a rate at which it flows through the lower hole portion22is small, which makes the molten glass easy to break in the drawing process and reduces the continuity of the glass fibers. When the ratio of the volume of the upper hole portion21to the volume of the lower hole portion22is greater than 5, the difference between the rate at which the molten glass flows through the upper hole portion21and the rate at which it flows through the lower hole portion22is relatively large, such that the impact of the molten glass on the lower hole portion22is increased. Moreover, since the molten glass is in a high temperature state, if the molten glass is stored in the upper hole portion21too much, the high temperature and high pressure will damage the connection position between the upper hole portion21and the lower hole portion22, thereby significantly reducing the service cycle of the lower hole portion22. Therefore, the volume of the upper hole portion21is designed to be 2 to 5 times that of the lower hole portion22to effectively ensure the continuous production of the flat glass fibers and improve the service cycle of the nozzle structure.

In some specific embodiments, the volume of the upper hole portion21is 2.4 to 4.5 times that of the lower hole portion22. In the present embodiment, when the cross-section of the lower hole portion22is elongated or oblong, and the ratio of the length to the width of the cross-section of the lower hole portion22is 6:1 to 10:1, the smoothness of the drawing of the flat glass fibers and the continuity of the production of the flat glass fibers can be effectively improved, and the service cycle of the nozzle structure100can also be effectively guaranteed and prolonged. It should be noted that the cross-section of the flat glass fibers produced by the nozzle structure100in the present embodiment has an aspect ratio of 3:1 to 5:1, and the flat glass fibers have good specific surface area, tensile strength and bending strength, and can meet the usage requirements of the composite materials produced subsequently.

According to an exemplary embodiment, as shown inFIG.5, the glass fiber bushing200provided by the present embodiment includes a bushing body3and a nozzle structure100.

In one embodiment, the bushing body3and the nozzle structure100are an integral structure, which is convenient for processing and production.

Exemplarily, the bushing body3may be in a rectangular or square shape.

With reference toFIG.5, a plurality of nozzle structures100are provided on the bushing body3. In a second direction, a plurality of nozzle structures100are arranged on the bushing body3in an array. The second direction can be understood as an extension direction along the length of the bushing body3, such as a Y direction inFIG.5. By arranging the nozzle structures100in an array on the bushing body3, the heat radiated by the filamentous molten glass formed by the nozzle structures100is evenly dissipated, and the performance of the produced flat glass fiber bundles is improved.

It should be noted that the nozzle structures100can also be arranged on the bushing body3in other ways. For example, the adjacent nozzle structures100in the upper and lower rows are arranged in a staggered order, as long as the nozzle structures100are evenly arranged on the bushing body3.

In some embodiments, the plurality of nozzle structures100on the bushing body3may be arranged in a manner of (50-100) rows×(5-30) columns, such that the total number of nozzle structures100on the bushing body3is maintained between 250 and 3,000, so as to meet the production requirements of the flat glass fibers.

In some specific embodiments, the plurality of nozzle structures100on the bushing body3are arranged in a manner of (60-80) rows×(10-20) columns, such that the total number of nozzle structures100on the bushing body3is maintained between 600 and 1,600, so as to meet the production requirements of the flat glass fibers, facilitate the processing and production of the bushing200, and reduce the processing and production cost of the bushing200.

As shown inFIG.5, in some embodiments, the nozzle structure100may be embedded on the bushing body3. In the extension direction from the top surface of the bushing body3to the bottom surface of the bushing body3, the end face of the outlet of the nozzle structure100is 0.6 mm to 1.2 mm higher than the bottom surface of the bushing body3, which is convenient to form a cone at the lower end of the nozzle structure100after the molten glass flows out from the bushing200, so as to improve the forming quality and production efficiency of the flat glass fibers.

As shown inFIG.5, in some embodiments, cooling channels4are arranged on the bushing body3. In the Y direction, a plurality of cooling channels4are arranged at intervals. A cooling channel4is arranged between any two adjacent rows of nozzle structures100, and an axis of the cooling channel4is arranged parallel to a long axis direction of the nozzle structure100. It should be noted that a cooling medium is introduced into the cooling channel4, and the cooling medium is convenient for cooling the long axis direction of the nozzle structure100, such that the heat radiated by the filamentous molten glass is evenly cooled, and the molten glass is cooled and crystallized on both sides of the long axis of the hole2to facilitate the formation of the flat glass fibers.

In the above embodiment, by arranging the nozzle structures100in an array on the bushing body3, and arranging the cooling channel4between any two adjacent rows of nozzle structures100, the forming quality and production efficiency of the flat glass fibers are improved while meeting the production requirements of the flat glass fibers. In addition, the bushing200of the present embodiment has a long service cycle and is convenient for processing and production.

According to an exemplary embodiment, as shown inFIG.6, the glass fiber production device provided by the embodiment includes a tank furnace10, a bushing200, a sizing applicator20, a gathering device30, and a fiber drawing machine40.

Exemplarily, the tank furnace10is provided with a liquid outlet for the molten glass to flow out. The bushing200is arranged on the liquid outlet. The top surface of the upper hole portion21of the nozzle structure100on the bushing200is arranged opposite to the liquid outlet. The sizing applicator20, the gathering device30, and the fiber drawing machine40are arranged below the bushing200at intervals in sequence.

In some embodiment, as shown inFIG.6, the glass fiber production device further includes air ducts50. A plurality of the air ducts50are symmetrically arranged on both sides of the bushing200, and an air outlet of each of the air ducts50is located between the bushing200and the sizing applicator20, and is configured to cool both sides of the nozzle structure100and the glass fiber bundles flowing out of the hole2by spraying, so as to facilitate the formation of the flat glass fibers and improve the production efficiency of the flat glass fibers.

In the present embodiment, mineral powder110is transported into the tank furnace10to form the molten glass, and then the molten glass flows out through the flat nozzle structure100on the bushing200to form cones, and then form glass fibers60. The glass fibers60are coated with a sizing composition through the sizing applicator20, then bundled by the gathering device30, and then wound on a collet401of the fiber drawing machine40to form a package. The air duct50is configured to air cool the formed glass fibers60, so as to effectively improve the flatness ratio and production efficiency of the glass fibers.

According to the following Table 1, statistics are made on the parameters of the nozzle structure, the bushing, and the flat glass fibers (or non-circular cross-section glass fibers) produced by the corresponding production devices of the present application.

TABLE 1Relevant parameters and product test data of glass fiber nozzle structure, bushing and processEmbodimentEmbodimentEmbodimentEmbodimentEmbodimentParameter12345Glass formula for productionSee patent application No. CN201811171285.Xof non-circular cross-sectionNovel Glass Fiber Compositionglass fibersThickness of bushing1.21.21.31.31.4body/mmNumber of nozzles (row ×50 × 560 × 560 × 660 × 760 × 8column)Cross-sectional shape ofElongatedElongatedOblongOblongOblongupper hole portionSection length of top surface11.011.011.011.011.0of upper hole portion/mmSection width of top surface6.56.56.26.26.0of upper hole portion/mmSection length of bottom9.09.09.09.09.0surface of upper holeportion/mmSection width of bottom4.24.04.03.53.5surface of upper holeportion/mmHeight of upper hole1.01.01.11.11.2portion/mmCross-sectional shape ofElongatedElongatedOblongOblongElongatedlower hole portionSection length of lower hole6.06.06.56.56.5portion/mmSection width of lower hole1.21.01.01.01.0portion/mmHeight of lower hole1.21.21.31.31.4portion/mmWall thickness of second0.80.91.01.11.2body/mmTemperature of molten glass12801270127012601250(° C.)Air velocity of air duct/(m/s)1.21.21.31.31.4Long diameter of cross-29.7-40.523.2-34.821-3323.8-3421-31.5section of glass fibers (μm)Short diameter of cross-11-158-127-106-106-9section of glass fibers (μm)Aspect ratio of cross-section2.7:12.9:13.0:13.4:13.5:1of glass fibersEmbodimentEmbodimentEmbodimentEmbodimentEmbodimentParameter678910Glass formula for productionSee patent application No. CN201811171285.Xof non-circular cross-sectionNovel Glass Fiber Compositionglass fibersThickness of bushing1.41.51.51.61.6body/mmNumber of nozzles (row ×60 × 960 × 1060 × 1160 × 1260 × 12column)Cross-sectional shape ofElongatedElongatedElongatedOblongOblongupper hole portionSection length of top surface10.010.010.010.010.0of upper hole portion/mmSection width of top surface6.05.85.85.65.6of upper hole portion/mmSection length of bottom9.09.09.09.09.0surface of upper holeportion/mmSection width of bottom3.53.53.53.53.5surface of upper holeportion/mmHeight of upper hole1.01.01.01.01.0portion/mmCross-sectional shape ofOblongOblongElongatedElongatedElongatedlower hole portionSection length of lower hole7.06.56.56.56.5portion/mmSection width of lower hole1.01.01.01.01.0portion/mmHeight of lower hole1.41.51.51.61.6portion/mmWall thickness of second0.71.31.51.61.6body/mmTemperature of molten glass12501250125512551255(° C.)Air velocity of air duct/(m/s)1.51.51.61.61.7Long diameter of cross-21.6-32.422.8-34.224-3624.6-32.821-33.6section of glass fibers (μm)Short diameter of cross-6-96-96-86-85-8section of glass fibers (μm)Aspect ratio of cross-section3.6:13.8:14:14.1:14.2:1of glass fibers

FIG.7toFIG.9show SEM images of the nozzle structures and bushings shown in some embodiments and the flat glass fibers produced by the corresponding production device.FIG.7is an SEM image of flat glass fibers produced using the nozzle structure and the bushing of Embodiment 1.FIG.8is an SEM image of flat glass fibers produced using the nozzle structure and the bushing of Embodiment 3.FIG.9is an SEM image of flat glass fibers produced using the nozzle structure and the bushing of Embodiment 9.

The bushing structure of the present application has the advantages of simple structure, convenient production, and long service life. The production cost of the bushing is low, and the bushing is easy to be used on a large scale. It can be concluded fromFIG.7toFIG.9and Table 1 that the glass fibers produced by the glass fiber production device of the present application have stable quality, and the cross-sectional aspect ratio is easy to control. The cross-sectional aspect ratio of the flat glass fibers produced is between 2.7:1 and 4.2:1, which can meet the performance requirements for the flat glass fibers in subsequent composite material production.

The content described above can be implemented individually or in various combinations, and these modifications are all within the protection scope of the present application.

It should be noted that relational terms herein such as “first” and “second” are merely used to distinguish one entity or operation from another entity or operation without necessarily requiring or implying any actual such relationship or order between such entities or operations. In addition, terms “include”, “comprise”, or any other variations thereof are intended to cover a non-exclusive inclusion, so that a process, a method, an article, or a device including a series of elements not only includes those elements, but also includes other elements that are not explicitly listed, or also includes inherent elements of the process, the method, the article, or the device. Without more restrictions, the elements defined by the sentence “including a . . . ” do not exclude the existence of other identical elements in a process, method, article, or device including the elements.

Finally, it should be noted that the foregoing embodiments are only used to explain the technical solutions of the present application, and are not intended to limit the same. Although the present application is described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or make equivalent substitutions on some technical features therein. These modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

INDUSTRIAL APPLICABILITY

In a glass fiber nozzle structure of the present application, the hole is provided on the nozzle body, and the hole includes the upper hole portion and the lower hole portion that are connected in sequence. The projection of the lower hole portion is located within the projection of the upper hole portion in the projection on the plane perpendicular to the axis line of the lower hole portion. On the one hand, this method of large top and small bottom is more conducive to the processing of the nozzle structure, ensuring the processing accuracy and improving the processing efficiency. On the other hand, the viscosity of the molten glass in the molten state is increased through the upper hole portion, and the lower hole portion has an aspect ratio of 5:1 to 12:1, such that an aspect ratio of glass fibers produced through the nozzle structure is maintained between 2.7:1 and 4.2:1. The smaller lower hole portion is more conducive to the size control of the glass fibers, thereby effectively improving the performance of the flat glass fibers.