A high modulus glass fiber pultrusion material and product

Abstract

The present invention discloses a high modulus glass fiber pultrusion material. The process of impregnating a single glass fiber of the pultrusion material with resin is impregnated in a fiber impregnation system. The fiber impregnation system includes an impregnation tank, which includes a tank body and a tank cover. A first partition plate is provided in the impregnation tank. An impregnation area is formed between the first end wall of the impregnation tank and the first partition plate, and a resin extraction area is formed between the first partition plate and the second end wall of the impregnation tank. A plurality of grids and a first preformed plate are provided in the resin extraction area. The grids include a plurality of grid bars that are horizontally arranged and parallel to each other, and grids are formed between adjacent grid bars. Adjacent grids are arranged at different heights in the tank body, and the trajectory of the fiber passing through the grids of the plurality of grids is wavy and concave-convex. The glass fiber pultrusion material and products of the present application have a high tensile modulus and excellent fatigue resistance.

Description

Technical Field

[0001] The invention relates to the technical field of pultrusion technology, and in particular to a high modulus glass fiber pultrusion material and a product thereof. Background Art

[0002] At present, the most important process in the blade processing field is the vacuum infusion process. As the infusion component of the main beam, special attention should be paid to the tensile modulus and fatigue performance of the pultruded material. The reinforcing materials used in the pultrusion molding process are mainly carbon fiber, glass fiber, basalt fiber, etc. With the increasing demand for pultruded materials and products for wind energy blades, and the high price of carbon fiber, the development of glass fiber pultruded materials and products that can meet the performance requirements of the future development of wind turbine blades is the main trend in the wind power field. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a high modulus glass fiber pultrusion material and product. After the glass fiber is impregnated with resin, it is layered through the grid of the grid, and excess resin is squeezed out in the grid to squeeze out excess bubbles in the resin. The travel curve of the glass fiber is adjusted to maintain the straightness of the glass fiber so that the molded products and materials have good tensile modulus and fatigue resistance.

[0004] According to one aspect of the present invention, a high modulus glass fiber pultrusion material is provided. The pultrusion material is a composite material formed by curing a single glass fiber after being impregnated with a thermosetting resin; wherein the process of impregnating a single glass fiber of the pultrusion material with the resin is performed in a fiber impregnation system. The fiber impregnation system is a closed circulation impregnation system, including an impregnation tank, the impregnation tank including a tank body and a tank cover that closes the tank body, a first partition plate is provided in the impregnation tank, an impregnation area is formed between the first end wall of the impregnation tank and the first partition plate, and a glue draining area is formed between the first partition plate and the second end wall of the impregnation tank, wherein the first end wall and the first partition plate are the same threading hole plates; along the glass fiber pultrusion direction, a plurality of grids and a first preformed plate arranged perpendicular to the glass fiber pultrusion direction are provided in the glue draining area, and a glue outlet is provided at the bottom of the glue draining area; the grid includes a horizontal arrangement A plurality of grille bars are arranged in parallel with each other, and a grid is formed between adjacent grille bars, the number of rows of the grille is the same as the number of rows of the yarn holes on the first partition plate; the glass fibers enter the impregnation area from the yarn holes on the first end wall to be impregnated with resin, and enter the leaching area from the yarn holes on the first partition plate, and the glass fiber array passes through the grille of the grille in layers to drain away excess resin on the surface of the glass fibers, and then passes through the first preformed plate after preforming and then passes through the second end wall; wherein, the adjacent grilles are arranged at different heights in the trough body, and the trajectory of the glass fibers passing through the grilles of several grilles is wavy and concave-convex.

[0005] Optionally, the grid bars of the grid are distributed at equal intervals, and the longitudinal interval of the grid is 1 to 3 mm.

[0006] Optionally, a plurality of first preformed holes of a predetermined shape are formed on the first preformed plate, and a plurality of glass fibers pass through one of the first preformed holes to form a glass fiber material of a predetermined shape.

[0007] Optionally, at least one second partition plate is provided in the dipping area to divide the dipping area into N dipping units, N≥2, and at least one glue outlet is correspondingly provided at the bottom of each dipping unit; during dipping, at least one of the N dipping units is filled with resin and the glue outlet at the bottom is closed, and the glue outlets at the bottom of the remaining dipping units are opened; the glass fiber passes from the dipping area and is dipped in the dipping unit filled with resin.

[0008] Optionally, the second partition plate is a yarn-passing hole plate, the yarn-passing holes of the second partition plate are the same as the yarn-passing holes of the first partition plate, and the height of the second partition plate is lower than that of the first partition plate.

[0009] Optionally, the fiber impregnation system also includes a recovery hood, a glue storage tank and a guide pipe. The recovery hood is arranged below the bottom wall of the glue impregnation tank, and the recovery hood is connected to the glue storage tank. The resin flowing out from the glue outlet of the glue impregnation tank flows into the recovery hood and then is recovered into the glue storage tank. Corresponding to each impregnation unit, at least one resin inlet is opened on the tank cover of the glue impregnation tank, and the glue storage tank is connected to the resin inlet through the guide pipe to inject the resin into the impregnation unit.

[0010] Optionally, the process of impregnating a single glass fiber of the pultruded material with resin is carried out under constant temperature conditions; the tank wall of the glue storage tank is a double-layer tank wall, and hot water circulates in the double-layer tank wall of the glue storage tank to heat the resin in the glue storage tank so that the resin in the glue storage tank is maintained at a predetermined temperature, so that the temperature of the resin injected from the glue storage tank into the impregnation tank is constant.

[0011] Optionally, the glass fiber is introduced into the fiber dipping system through a yarn feeding device, which includes a yarn frame, a yarn guide rod and a tension adjustment mechanism arranged on the yarn frame, and the tension adjustment mechanism includes a tension adjustment spring and a tension adjuster; the glass fiber passes through the tension adjustment mechanism under the guidance of the yarn guide rod, and the tension adjustment spring and the tension adjuster adjust the tension of the glass fiber to feed the glass fiber into the dipping tank in a straight line.

[0012] Optionally, the glass fiber is E7 glass fiber, E8 glass fiber or E9 glass fiber, and the resin is an epoxy type resin.

[0013] According to another aspect of the present invention, a high modulus glass fiber pultruded product is provided, which is made of the high modulus glass fiber pultruded material provided by the present application.

[0014] The tension and arrangement of glass fibers affect the modulus and fatigue properties of pultruded materials. Glass fibers are elastic lines. Before they break, they obey Hooke's law, that is, elongation is proportional to tension, and the relationship between stress and strain is basically a straight line with no yield point. During the application of pultruded products, the glass fibers in the pultruded materials are stressed together. Once the glass fibers break in the pultruded products, the glass fibers in the pultruded materials will be subjected to inconsistent stress and gradually break faster. The fiber diameter of the pultruded products also affects the tensile modulus of the pultruded materials. The higher the straightness of the glass fibers in the pultruded products, the more evenly the glass fibers are stressed, and the higher the modulus of the pultruded materials.

[0015] This application improves the process of impregnating glass fibers with resin by using glass fibers of higher modulus such as E7\E8\E9. After impregnation, the glass fibers travel through the grids of the grid to drain excess resin from the surface of the glass fibers, ensuring that the glass fibers are fully impregnated while reducing the impact of bubbles in the resin on product performance. This application adjusts the height difference of the grid so that the cross-section of any row of grids of the grid is wavy and concave. After the fibers are impregnated with resin, they enter the grids of the grid in layers. The trajectory of the fibers traveling through the grids of the grid is a curved concave-convex shape, maintaining the straightness of the yarn in the product and squeezing out excess bubbles in the impregnated resin, retaining the tensile properties of the glass fiber yarn itself, and the molded products and materials have good tensile modulus and fatigue properties.

[0016] When the grid spacing of the grid is 1 to 3 mm, the glass fiber can pass through the grid to remove excess resin on the surface of the glass fiber. Preferably, the grid spacing of the grid is 2 mm. Under this condition, the tension of the glass fiber passing through the grid is average, the straightness is the highest, and the modulus of the pultruded material is higher. The present invention improves the fiber impregnation device and optimizes the fiber impregnation process without increasing the volume content of the glass fiber. The glass fiber pultruded material impregnated by the fiber impregnation system of the present application has good tensile modulus and fatigue resistance.

[0017] The present invention improves the dipping process of glass fiber pultrusion materials, changes the current situation of simply increasing the glass fiber content to improve the mechanical properties of materials or products such as tensile modulus, and solves the problem of fatigue performance degradation caused by increasing the glass fiber content of glass fiber pultrusion materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 It is a structural schematic diagram of a fiber dipping system of a high modulus glass fiber pultrusion material of the present application;

[0020] Figure 2 It is a structural schematic diagram of the dip zone of the fiber dip system;

[0021] Figure 3 is a line diagram of the trajectory of the glass fiber passing through the grid in the embodiment;

[0022] Figure 4 3 is a glass fiber content-modulus curve of the glass fiber pultruded material in the embodiment. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. It should be noted that, in the absence of conflict, the embodiments in this application and the feature vectors in the embodiments can be arbitrarily combined with each other.

[0024] The existing blade manufacturing process is mainly vacuum infusion process. As the infusion part of the main beam, it is necessary to focus on the tensile modulus and fatigue performance. The volume content of glass fiber in vacuum infusion can only be less than 60%. In this case, E6 glass fiber is used, and its tensile modulus is 47-48GPa. This can be applied to ordinary blades, but with the large-scale blades and the improvement of the process, higher modulus and fatigue performance material support are needed.

[0025] For materials and products produced by pultrusion process, the tensile modulus increases basically linearly with the increase of fiber content. With the increase of glass fiber content, its processability will gradually deteriorate, the resistance in the pultrusion process will increase, the continuity of production will be unstable, the appearance of the material or product will also be affected, especially its fatigue performance will be greatly affected.

[0026] The present application provides a high modulus glass fiber pultruded material, which is a composite material formed by curing a single glass fiber after being impregnated with a thermosetting resin; wherein the process of impregnating the single glass fiber of the pultruded material with the resin is carried out in a fiber dipping system.

[0027] like Figure 1As shown, the fiber dipping system of the present application is a closed circulation dipping system, including a dipping tank 100, the dipping tank 100 includes a tank body 10 and a tank cover 20 that closes the tank body 10, a first partition plate 13 is provided in the dipping tank 100, a dipping area 50 is formed between the first end wall 11 of the dipping tank 100 and the first partition plate 13, a dipping area 60 is formed between the first partition plate 13 and the second end wall 12 of the dipping tank 100, and the first end wall 11 and the first partition plate 13 are the same threading hole plates. Among them, the threading holes on the first end wall 11 and the first partition plate 13 are the same array holes.

[0028] like Figure 2 As shown, along the glass fiber pulling direction, a plurality of grids 30 and a first preformed plate 14 arranged perpendicular to the glass fiber pulling direction are sequentially arranged in the glue-leaching area 60, and a glue outlet 17 is arranged at the bottom of the glue-leaching area 60. The grid 30 includes a plurality of grid bars 32 arranged horizontally and parallel to each other, and grids 33 are formed between adjacent grid bars 32. The number of rows of grids 33 of the grid 30 is the same as the number of rows of yarn holes on the first partition plate 13.

[0029] The glass fibers enter the impregnation area 50 through the threading holes of the first end wall 11 to be impregnated with resin, and enter the resin draining area 60 through the threading holes of the first partition plate 13. The glass fibers pass through the grids 33 of the grid 30 in layers to drain excess resin from the surface of the glass fibers, and then pass through the first preformed plate 14 to be preformed and then pass through the second end wall 12. The resin drained from the surface of the glass fibers is discharged through the glue outlet 17. Figure 3 As shown, adjacent grids 30 are arranged at different heights in the tank body 10, and the trajectory of the glass fiber passing through the grids 33 of several grids 30 is wavy and concave-convex.

[0030] The trajectory of the glass fiber passing through the grids 33 of the plurality of grids 30 is wavy and concave-convex, and while squeezing out the excess resin on the surface of the glass fiber, the tension of the glass fiber is maintained. The yarn passing through the fiber dipping system and entering the pultrusion device is continuous, has high straightness, and has a high tensile modulus, which reduces the pultrusion resistance and can be continuously and stably pultruded to obtain the pultruded material, which has a high tensile modulus.

[0031] In actual application, the height difference between the plurality of grids 30 can be adjusted to adjust the curvature of the wave-shaped concave-convex shape formed by the trajectory of the glass fiber passing through the grid 33 .

[0032] The grid bars 32 of the grid 30 are evenly spaced, and the longitudinal spacing of the grids 33 is 1 to 3 mm. Preferably, the longitudinal spacing of the grids 33 is 2 mm.

[0033] The first preformed plate 14 is provided with a plurality of first preformed holes of a predetermined shape, and a plurality of glass fibers pass through one of the first preformed holes to form a glass fiber material of a predetermined shape.

[0034] As an example, the second end wall 12 is a second preformed plate.

[0035] Based on the above example, in one possible implementation, a plurality of second preformed holes corresponding to the first preformed holes on the first preformed plate 14 are provided on the second end wall 12, and the second preformed holes have the same shape as the first preformed holes and are proportionally reduced relative to the first preformed holes. The glass fiber material of the predetermined shape passing through the first preformed plate 14 passes through the second preformed holes of the second end wall 12 for secondary preformation. Since the size of the second preformed hole is smaller than the size of the first preformed hole, the glass fiber material of the predetermined shape passing through the first preformed hole is squeezed by the second preformed hole when passing through the second preformed hole, and the size of the glass fiber material of the predetermined shape is compressed to the same size as the second preformed hole, thereby reducing the difficulty of the subsequent pultrusion process. Preferably, the size of the second preformed hole is 0.6 to 0.8 of the size of the first preformed hole.

[0036] As an example, Figure 1 As shown, at least one second partition plate 16 is provided in the dipping area 50, and the second partition plate 16 divides the dipping area into N dipping units 55, N ≥ 2, and at least one glue outlet 17 is correspondingly provided at the bottom of each dipping unit 55. During dipping, at least one dipping unit 55 among the N dipping units 55 is filled with resin and the glue outlet 17 at the bottom is closed, and the glue outlets 17 at the bottom of the remaining dipping units 55 are opened; the glass fiber passes from the dipping area 50 to be dipped in the dipping unit 55 filled with resin.

[0037] After the glass fiber is dipped in the resin for a period of time, the hairiness on the surface of the glass fiber is immersed in the resin, and it is necessary to stop the continuous entry process to replace the resin in the dipping tank and clean the hairiness in the dipping tank, which affects the continuous production of the glass fiber material. The N dipping units 55 of the present application operate sequentially. When the dipping unit 55 needs to clean the hairiness, the glue outlet 17 of the next dipping unit 55 is closed sequentially and filled with resin, and the glass fiber is dipped in the next dipping unit 55; at the same time, the glue outlet 17 at the bottom of the dipping unit 55 that needs to be cleaned is opened to recover the resin therein, and then the hairiness in this dipping unit 55 is cleaned. In the present application, the glass fiber is dipped in the dipping area 50, and there is no need to stop the production process due to the hairiness cleaning process, which effectively improves the production efficiency of the glass fiber pultrusion material.

[0038] Based on the above example, in a possible implementation, Figure 1As shown, two second partition plates 16 are provided in the dipping area 50, and the two second partition plates 16 divide the dipping area into three dipping units 55, and a corresponding glue outlet 17 is provided at the bottom of each dipping unit 55. During dipping, one of the three dipping units 55 is filled with resin and the glue outlet 17 at the bottom is closed, and the glue outlets 17 at the bottom of the other two dipping units 55 are opened; the glass fiber passes from the dipping area 50 to be dipped in the dipping unit 55 filled with resin.

[0039] The three dipping units 55 operate sequentially. After the glass fiber is dipped in one dipping unit 55 for a period of time, the glue outlet 17 at the bottom of the next dipping unit 55 is closed sequentially and filled with resin. The glass fiber starts to be dipped in the next dipping unit 55. At the same time, the glue outlet 17 at the bottom of the dipping unit 55 that needs to be cleaned is opened to discharge the resin and clean the hairiness in the dipping unit 55.

[0040] As an example, the second partition plate 16 of the fiber dipping system is a threading hole plate, and the threading holes of the second partition plate 16 are the same array holes as the threading holes of the first partition plate 13. Under this condition, the glass fiber passes through the dipping area 50 in a straight line, maintaining the overall tension of the glass fiber.

[0041] As an example, the height of the second partition plate 16 is lower than that of the first partition plate 13 to prevent the resin from overflowing into the dipping area 60 when the resin is injected into the dipping unit 55 .

[0042] As an example, Figure 1 As shown, the fiber impregnation system of the present application also includes a recovery cover 200, a glue storage tank 300 and a guide pipe. The recovery cover 200 is arranged below the bottom wall of the glue impregnation tank 100, and the recovery cover 200 is connected to the glue storage tank 300; the resin flowing out from the glue outlet 17 of the glue impregnation tank 100 flows into the recovery cover 200 and then is recovered into the glue storage tank 300.

[0043] Corresponding to each dipping unit 55 , at least one resin inlet (not shown) is provided on the tank cover 20 of the dipping tank 100 , and the resin storage tank 300 is connected to the resin inlet of each dipping unit 55 through a guide tube (not shown) to inject resin into the dipping unit 55 .

[0044] As an example, a control valve is provided on the guide tube at the resin inlet of each dipping unit 55. When the dipping unit 55 is dipping, the glue outlet 17 at the bottom of the dipping unit 55 is closed first, and then the control valve on the guide tube connected to the dipping unit 55 is opened to inject resin into the dipping unit 55. After the dipping unit 55 is filled with resin, the control valve is closed to stop further injection of resin into the dipping unit 55.

[0045] As an example, the glue storage tank 300 is connected to a vacuum pump, and the vacuum pump pumps the resin in the glue storage tank 300 into the glue dipping unit 55 .

[0046] Preferably, the process of impregnating the single glass fiber of the pultruded material with the resin is carried out under constant temperature conditions. Figure 1 As shown, the tank wall of the glue storage tank 300 is a double-layer tank wall, and an insulation layer is formed between the double-layer tank walls. Hot water circulates in the insulation layer to heat the resin in the glue storage tank 300 so that the resin in the glue storage tank 300 is maintained at a predetermined temperature, so that the temperature of the resin injected from the glue storage tank 300 into the glue dipping tank 100 through the guide pipe is constant.

[0047] The temperature of the hot water circulating in the double-layered tank wall of the glue storage tank 300 is 30°C to 50°C, so that the temperature of the resin injected from the glue storage tank 300 to the glue dipping tank 100 through the guide pipe is 30°C to 50°C.

[0048] As an example, Figure 1 As shown, the recovery cover 200 is funnel-shaped, with the thick end opening of the recovery cover 200 facing the bottom wall of the resin dipping tank 100, and the thin end opening being sealed and connected to the resin storage tank 300. The resin flowing out of the resin dipping tank 100 flows back into the resin storage tank 300 through the recovery cover 200.

[0049] According to an example of the present application, the impregnation process of the glass fiber pultrusion material of the present application introduces the glass fiber into the fiber dipping system through a yarn feeding device, the yarn feeding device includes a yarn frame, a yarn guide rod and a tension adjustment mechanism arranged on the yarn frame, the tension adjustment mechanism includes a tension adjustment spring and a tension regulator; the glass fiber passes through the tension adjustment mechanism under the guidance of the yarn guide rod, and the tension adjustment spring and the tension regulator adjust the tension of the glass fiber to send the glass fiber straight into the dipping tank 100. The tension adjustment mechanism is used to control the tension of each yarn, make the tension constant, maintain the straightness of the yarn, ensure the arrangement and straightness of the glass fiber inside the product, improve and enhance the overall tensile properties of the glass fiber pultrusion material, and enhance the modulus of the glass fiber pultrusion material.

[0050] Preferably, the glass fiber in the pultruded material and pultruded product of the present application is E7, E8 glass fiber or E9 glass fiber, and the resin is an epoxy type resin.

[0051] The performance of the glass fiber pultrusion material of the present application is specifically described below by comparison. Figure 4 The glass fiber content-modulus curves of the glass fiber pultruded materials A1 and A2 of the present application and the existing E6 glass fiber pultruded material are shown.

[0052] The glass fiber of the pultruded material A1 of the present application is E8 glass fiber, the resin is epoxy resin, and the impregnation process is carried out in a fiber impregnation system. Figure 4As shown, the linear relationship between the tensile modulus y of A1 and the glass fiber content x is y=117.1x-34.09. The glass fiber content in the pultruded material A1 of the present application can reach more than 85%, and the tensile modulus can reach 67 GPa.

[0053] The glass fiber of the glass fiber pultrusion material A2 of the present application is E7 glass fiber, the resin is epoxy resin, and the impregnation process is carried out in a fiber impregnation system. Figure 4 As shown, the linear relationship between the A2 tensile modulus y and the glass fiber content x is y=112.1x-31.93, the glass fiber content in the pultruded material can be as high as 85%, and the tensile modulus can be as high as about 63 GPa.

[0054] The linear relationship between the tensile modulus y and the glass fiber content x of the pultruded material of comparative example X2 is y=92.77x-12.32. The glass fiber content can be as high as 84%, and the tensile modulus can be as high as about 57 GPa.

[0055] It can be seen that the glass fiber pultruded material of the present application adopts high modulus E7 and E8 glass fibers, and the modulus of the obtained pultruded materials and pultruded products is greatly improved by optimizing the impregnation process of the glass fibers.

[0056] It should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that an article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such article or device. In the absence of more restrictions, the elements defined by the sentence "includes..." do not exclude the existence of other identical elements in the article or device including the elements.

[0057] The above embodiments are only used to illustrate the technical solution of the present invention and are not intended to limit the present invention. The present invention is described in detail with reference to the preferred embodiments. It should be understood by those skilled in the art that the technical solution of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present invention, and should be included in the scope of the claims of the present invention.

Claims

1. A high modulus glass fiber pultrusion material, characterized in that: The pultruded material is a composite material formed by impregnating a single glass fiber with a thermosetting resin and then curing it; wherein the process of impregnating the single glass fiber of the pultruded material with the resin is performed in a fiber impregnation system; The fiber dipping system is a closed circulation dipping system, comprising a dipping tank (100), wherein the dipping tank (100) comprises a tank body (10) and a tank cover (20) closing the tank body (10), wherein a first partition plate (13) is arranged in the dipping tank (100), a dipping area (50) is formed between a first end wall (11) of the dipping tank (100) and the first partition plate (13), and a dipping area (60) is formed between the first partition plate (13) and a second end wall (12) of the dipping tank (100), wherein the first end wall (11) and the first partition plate (13) are the same threading hole plates; Along the glass fiber pulling direction, the glue-leaching area (60) is provided with a plurality of grids (30) and a first preformed plate (14) arranged perpendicular to the glass fiber pulling direction, and a glue outlet (17) is arranged at the bottom of the glue-leaching area (60); The grille (30) comprises a plurality of grille bars (32) arranged horizontally and parallel to each other, grids (33) are formed between adjacent grille bars (32), and the number of rows of grids (33) of the grille (30) is the same as the number of rows of yarn threading holes of the first partition plate (13); The glass fibers enter the impregnation area (50) through the threading holes of the first end wall (11) to be impregnated with resin, and then pass through the threading holes of the first partition plate (13) to enter the leaching area (60). The glass fiber array passes through the grid (33) of the grid (30) in layers to remove excess resin from the surface of the glass fibers, and then passes through the first preformed plate (14) after being preformed and out of the second end wall (12); Wherein, the adjacent grilles (30) are arranged at different heights in the trough body (10), and the trajectory of the glass fiber passing through the grids (33) of several grilles (30) is in a wave-like concave-convex shape.

2. The high modulus glass fiber pultrusion material according to claim 1, characterized in that: The grid bars (32) of the grid (30) are distributed at equal intervals, and the longitudinal interval of the grid (33) is 1 to 3 mm.

3. The high modulus glass fiber pultrusion material according to claim 1, characterized in that: The first preformed plate (14) is provided with a plurality of first preformed holes of a predetermined shape, and a plurality of glass fibers pass through one of the first preformed holes to form a glass fiber material of a predetermined shape.

4. The high modulus glass fiber pultrusion material according to claim 1, characterized in that: At least one second partition plate (16) is arranged in the dipping area (50) to divide the dipping area into N dipping units (55), N≥2, and at least one glue outlet (17) is correspondingly arranged at the bottom of each dipping unit (55); During the dipping process, at least one of the N dipping units (55) is filled with resin and the glue outlet (17) at the bottom is closed, while the glue outlets (17) at the bottom of the remaining dipping units (55) are opened; the glass fiber passes through the dipping unit (55) filled with resin from the dipping area (50) and is dipped in the dipping unit (55).

5. The high modulus glass fiber pultrusion material according to claim 4, characterized in that: The second partition plate (16) is a yarn-threading hole plate, and the yarn-threading hole of the second partition plate (16) is the same as the yarn-threading hole of the first partition plate (13); the height of the second partition plate (16) is lower than that of the first partition plate (13).

6. The high modulus glass fiber pultrusion material according to any one of claims 1 to 5, characterized in that: The fiber dipping system further comprises a recovery cover (200), a glue storage tank (300) and a guide pipe, wherein the recovery cover (200) is arranged below the bottom wall of the glue dipping tank (100), the recovery cover (200) is connected to the glue storage tank (300), and the resin flowing out of the glue outlet (17) of the glue dipping tank (100) flows into the recovery cover (200) and then is recovered into the glue storage tank (300); Corresponding to each of the dipping units (55), at least one resin inlet is provided on the tank cover (20) of the dipping tank (100), and the resin storage tank (300) is connected to the resin inlet via a guide pipe to inject resin into the dipping unit (55).

7. The high modulus glass fiber pultrusion material according to claim 6, characterized in that: The process of impregnating the single glass fiber of the pultruded material with resin is carried out under constant temperature conditions; The tank wall of the glue storage tank (300) is a double-layer tank wall, and hot water circulates in the double-layer tank wall of the glue storage tank (300) to heat the resin in the glue storage tank (300) so that the resin in the glue storage tank (300) is maintained at a predetermined temperature, so that the temperature of the resin injected from the glue storage tank (300) into the glue dipping tank (100) is constant.

8. The high modulus glass fiber pultrusion material according to claim 6, characterized in that: The glass fiber is introduced into the fiber dipping system through a yarn feeding device, the yarn feeding device comprises a yarn frame, a yarn guide rod and a tension adjustment mechanism arranged on the yarn frame, the tension adjustment mechanism comprises a tension adjustment spring and a tension adjuster; the glass fiber passes through the tension adjustment mechanism under the guidance of the yarn guide rod, the tension adjustment spring and the tension adjuster adjust the tension of the glass fiber to feed the glass fiber into the dipping tank (100) in a straight line.

9. The high modulus glass fiber pultrusion material according to claim 6, characterized in that: The glass fiber is E7 glass fiber, E8 glass fiber or E9 glass fiber, and the resin is epoxy type resin.

10. A high modulus glass fiber pultrusion product, characterized in that: Made of the high modulus glass fiber pultrusion material according to any one of claims 1 to 9.

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