Rapid sample preparation equipment for testing interfacial strength of polyimide fiber

Abstract

The utility model relates to the technical field of fiber testing, in particular to rapid sample preparation equipment for testing the interfacial strength of polyimide fibers. The utility model discloses rapid sample preparation equipment for testing the interfacial strength of polyimide fibers. The rapid sample preparation equipment comprises a creel, a modification treatment device, a first drying oven, a resin treatment device, a second drying oven and a winding roller, the polyimide fiber filament winding is arranged on the creel, the winding roller is used for winding treated fibers, and the modification treatment device, the first drying oven, the resin treatment device and the second drying oven are sequentially arranged in the fiber movement direction. According to the rapid sample preparation equipment, the sample preparation time can be remarkably shortened, so that the overall test efficiency is improved. According to the method, the consistency and repeatability of samples can be ensured, so that the reliability and repeatability of interface strength test results are improved, different experimental conditions and process parameter adjustment can be quickly responded, and the research, development and optimization of new materials are accelerated.

Description

Technical Field

[0001] This utility model relates to the field of fiber testing technology, and in particular to a rapid sample preparation device for testing the interfacial strength of polyimide fibers. Background Technology

[0002] Polyimide fibers possess numerous advantages, including excellent high-temperature resistance, chemical corrosion resistance, mechanical properties, and insulation properties. In composite material applications, they are typically combined with other materials to form composites that leverage their strengths. However, the interfacial bonding strength between polyimide fibers and the matrix material (such as resin) has a crucial impact on the overall performance of the composite material.

[0003] Before testing, polyimide fibers and resin matrix need to be combined to form a prepreg and then cured. In existing technologies, samples are often prepared manually or directly using the factory's production line. Manual operation makes it difficult to accurately control the impregnation process of fibers and resin, which can easily lead to uneven resin distribution and poor repeatability. The latter test is too costly and delays actual production.

[0004] Therefore, there is a need for a rapid sample preparation device to facilitate the interfacial strength testing of polyimide fibers and accurately evaluate their interfacial bonding performance with the matrix, thereby providing reliable data support for optimizing the preparation process and performance of composite materials. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned shortcomings of the existing technology by proposing a rapid sample preparation device for testing the interfacial strength of polyimide fibers.

[0006] This utility model discloses a rapid sample preparation device for testing the interfacial strength of polyimide fibers, comprising a yarn rack, a modification treatment device, a first drying oven, a resin treatment device, a second drying oven, and a take-up roller; polyimide fiber filaments are wound on the yarn rack, and the take-up roller is used to take up the treated fibers; the modification treatment device, the first drying oven, the resin treatment device, and the second drying oven are arranged sequentially along the fiber movement direction.

[0007] Furthermore, the modification treatment device includes a first treatment box, a first roller and a second roller. The first treatment box contains a modifier solution. The first roller is disposed in the first treatment box and is located below the liquid surface. The second roller is located between the yarn frame and the first roller.

[0008] Furthermore, the resin treatment apparatus includes a liquid resin processor and a solid resin processor. The liquid resin processor includes a second treatment chamber and an impregnation roller disposed within the second treatment chamber. The solid resin processor includes a heating mesh, a heating plate, a drawing heating roller, a metering roller, and a support roller. The heating plate is inclinedly disposed on one side of the drawing heating roller, and its bottom contacts the roller surface of the drawing heating roller to form a resin receiving cavity. The heating mesh is disposed directly above the resin receiving cavity. The metering rollers are spaced apart above the drawing heating roller to control the resin thickness on the drawing heating roller. The support rollers are spaced apart below the drawing heating roller, and the fiber passes through the support rollers.

[0009] Furthermore, the solid resin processor is disposed above the liquid resin processor.

[0010] Furthermore, the first oven is equipped with a first spare roller.

[0011] Furthermore, the second oven is equipped with a second spare roller.

[0012] Furthermore, a first spacing roller is provided between the modification treatment device and the first oven.

[0013] Furthermore, a second spacing roller is provided between the first oven and the resin treatment device.

[0014] Furthermore, a third spacing roller is provided between the resin treatment device and the second oven.

[0015] Furthermore, a fourth spacing roller is provided between the second drying oven and the take-up roller.

[0016] The rapid sample preparation device for testing the interfacial strength of polyimide fibers of this invention has the following beneficial effects:

[0017] 1. Rapid sample preparation equipment can significantly shorten sample preparation time, thereby improving overall testing efficiency. This is especially important for research and production scenarios that require a large number of samples for interface strength testing.

[0018] 2. It can ensure the consistency and repeatability of samples, thereby improving the reliability and repeatability of interface strength test results.

[0019] 3. It can quickly respond to different experimental conditions and process parameter adjustments, which helps to accelerate the research and development and optimization of new materials, especially in the surface modification of polyimide fibers and the development of composite materials. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the rapid sample preparation device for testing the interfacial strength of polyimide fibers according to this utility model.

[0021] Figure 2 This is a schematic diagram of the solid resin processor.

[0022] Figure 3 This is a schematic diagram of the structure of the first spacing roller;

[0023] 1. Yarn rack; 2. Modification treatment device; 21. First treatment box; 22. First roller; 23. Second roller; 3. First drying oven; 31. First spare roller; 4. Resin treatment device; 41. Liquid resin processor; 411. Second treatment box; 412. Impregnation roller; 42. Solid resin processor; 421. Heating grid; 422. Heating plate; 423. Drafting heating roller; 424. Metering roller; 425. Support roller; 5. Second drying oven; 51. Second spare roller; 6. Take-up roller; 7. First spacing roller; 8. Second spacing roller; 9. Third spacing roller; 10. Fourth spacing roller. Detailed Implementation

[0024] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0025] like Figure 1 As shown, this utility model discloses a rapid sample preparation device for testing the interfacial strength of polyimide fibers, comprising a yarn frame 1, a modification treatment device 2, a first drying oven 3, a resin treatment device 4, a second drying oven 5, and a take-up roller 6; the polyimide fiber filaments are wound on the yarn frame 1, and the take-up roller 6 is used to take up the treated fibers; the modification treatment device 2, the first drying oven 3, the resin treatment device 4, and the second drying oven 5 are arranged sequentially along the fiber movement direction.

[0026] The modification treatment device 2 may include a first treatment tank 21, a first roller 22, and a second roller 23. The first treatment tank 21 contains a modifier solution. The first roller 22 is disposed inside the first treatment tank 21 and is located below the liquid surface. The second roller 23 is located between the yarn frame 1 and the first roller 22. Polyimide fiber filaments pass through the second roller 23 and the first roller 22 into the liquid surface inside the first treatment tank 21.

[0027] The resin processing apparatus 4 may include a liquid resin processor 41 or a solid resin processor 42. The liquid resin processor 41 includes a second processing tank 411 and an impregnation roller 412 disposed in the second processing tank 411.

[0028] like Figure 2As shown, the solid resin processor 42 includes a heating mesh 421, a heating plate 422, a drawing heating roller 423, a metering roller 424, and a support roller 425. The heating plate 422 is inclinedly disposed on one side of the drawing heating roller 423, and its bottom is in contact with the roller surface of the drawing heating roller 423 to form a resin receiving cavity. The heating mesh 421 is disposed directly above the resin receiving cavity. The metering rollers 424 are spaced above the drawing heating roller 423 to control the resin thickness on the drawing heating roller 423. The support rollers 425 are spaced below the drawing heating roller 423, and the fiber passes through the support rollers 425.

[0029] Here, the resin treatment device 4 includes a liquid resin processor 41 and a solid resin processor 42. The solid resin processor 42 is positioned above the liquid resin processor 41, so that the operator can choose either the liquid resin processor 41 or the solid resin processor 42 to load resin onto the fiber filament according to actual needs.

[0030] In the solid resin processor 42, the drawing heating roller 423 is existing technology and can be electrically heated or heated by heat transfer oil. It is a product that can be purchased in the prior art. In order to prevent the resin from dripping from both ends of the heating plate 422, baffles can be provided at both ends of the heating plate 422. The solid resin is placed on the heating mesh 421. The heating of the heating mesh 421 causes the solid resin to drip onto the resin receiving cavity. The drawing heating roller 423 rotates away from the heating plate 422, guiding the resin to the fiber filament located between it and the support roller 425. The metering rollers 424 are spaced above the drawing heating roller 423 to facilitate the control of the resin thickness on the drawing heating roller 423.

[0031] The first oven 3 may be equipped with a first spare roller 31. Polyimide fiber filaments enter the first oven 3, and the temperature can be set to 80℃. The first spare roller 31 can be installed in the oven to accelerate the condensation chemical reaction between the silane coupler and the fiber surface, thereby obtaining modified polyimide fiber filaments, which can then be sampled and tested.

[0032] The second oven 5 may also be equipped with a second spare roller 51 to control the time and tension of the fiber filaments inside.

[0033] A first spacing roller 7 may be provided between the modification treatment device 2 and the first drying oven 3 to control the thickness of the modifier on the polyimide fiber filament and to adjust the tension of the filament.

[0034] A second spacing roller 8 can be provided between the first drying oven 3 and the resin treatment device 4 to adjust the tension.

[0035] A third spacing roller 9 may be provided between the resin treatment device 4 and the second drying oven 5 to control the thickness of the resin on the polyimide fiber filament and to adjust the tension of the filament.

[0036] A fourth spacing roller 10 is provided between the second drying oven 5 and the winding roller 6 to adjust the tension.

[0037] The structures of the first spacing roller 7, the second spacing roller 8, the third spacing roller 9, and the fourth spacing roller 10 are as follows: Figure 3 As shown, this is a conventional fiber preparation equipment. The distance between the upper and lower rollers is adjusted according to the type, thickness, and process requirements of the yarn. If the distance is too large, the yarn tension may be insufficient, and if the distance is too small, the yarn may be over-compressed.

[0038] The specific process for using the rapid sample preparation equipment for testing the interfacial strength of polyimide fibers according to this invention is as follows:

[0039] A polyimide fiber filament is fixed on the yarn frame 1. The filament is fed into the first roller 22 in the second processing box 411 through the second roller 23. The first processing box 21 can be filled with modifiers such as KH550 silane coupler to modify the polyimide fiber filament. The polyimide fiber filament is immersed in the first processing box 21. The machine speed is the conventional speed of 3m / min. The thickness is controlled by the first spacing roller 7 to prevent uneven thickness from causing test errors.

[0040] The polyimide fiber filaments enter the first drying oven 3, where the temperature can be set to 80℃. The oven can be equipped with a first spare roller 31 to ensure the drying time and tension, thereby accelerating the condensation chemical reaction between the silane coupler and the fiber surface, obtaining modified polyimide fiber filaments, and taking samples for testing.

[0041] The modified polyimide fiber filaments are immersed in the second treatment chamber 411 through the impregnation roller 412 or by using the solid resin processor 42 to fully impregnate the fiber filaments with resin, which can be a two-component epoxy resin. The coating thickness is controlled by the third spacing roller 9. The fiber filaments after being combined with the resin enter the second drying oven 5, where the temperature can be set to 120°C. The drying oven can be equipped with a second spare roller 51 to ensure the drying time and tension, resulting in polyimide fiber composite filaments. These filaments are then wound up by the winding roller 6 and sampled for testing.

[0042] For any points not covered above, existing technologies shall apply.

[0043] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art can make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the direction of the present invention or exceeding the scope defined by the appended claims. Those skilled in the art should understand that any modifications, equivalent substitutions, improvements, etc., made to the above embodiments based on the technical essence of the present invention should be included within the protection scope of the present invention.

Claims

1. A polyimide fiber interfacial strength test rapid sample preparation apparatus characterized by: It includes a yarn rack (1), a modification treatment device (2), a first drying oven (3), a resin treatment device (4), a second drying oven (5), and a take-up roller (6); polyimide fiber filaments are wound on the yarn rack (1), and the take-up roller (6) is used to take up the treated fibers. The modification treatment device (2), the first drying oven (3), the resin treatment device (4), and the second drying oven (5) are arranged sequentially along the fiber movement direction.

2. A rapid sample preparation apparatus for polyimide fiber interfacial strength testing according to claim 1, characterized in that: The modification treatment device (2) includes a first treatment box (21), a first roller (22) and a second roller (23). The first treatment box (21) contains a modifier solution. The first roller (22) is located in the first treatment box (21) and below the liquid surface. The second roller (23) is located between the yarn frame (1) and the first roller (22).

3. A rapid sample preparation device for polyimide fiber interfacial strength testing according to claim 1, wherein: The resin processing device (4) includes a liquid resin processor (41) or a solid resin processor (42). The liquid resin processor (41) includes a second processing box (411) and an impregnation roller (412) disposed in the second processing box (411). The solid resin processor (42) includes a heating net (421), a heating plate (422), a drawing heating roller (423), a metering roller (424), and a support roller (425). The heating plate (422) is inclinedly disposed on one side of the drawing heating roller (423), and its bottom is in contact with the roller surface of the drawing heating roller (423) to form a resin receiving cavity. The heating net (421) is disposed directly above the resin receiving cavity. The metering rollers (424) are disposed at intervals above the drawing heating roller (423) to control the resin thickness on the drawing heating roller (423). The support rollers (425) are disposed at intervals below the drawing heating roller (423), and the fiber passes through the support rollers (425).

4. A rapid polyimide fiber interfacial strength test specimen preparation apparatus as defined in claim 3, wherein: The solid resin processor (42) is disposed above the liquid resin processor (41).

5. A rapid polyimide fiber interfacial strength test specimen preparation apparatus as defined in claim 1 wherein: The first oven (3) is equipped with a first spare roller (31).

6. A rapid polyimide fiber interfacial strength test specimen preparation apparatus as defined in claim 1, wherein: The second oven (5) is equipped with a second spare roller (51).

7. A rapid polyimide fiber interfacial strength test specimen preparation apparatus as defined in claim 1 wherein: A first spacing roller (7) is provided between the modification treatment device (2) and the first oven (3).

8. The rapid sample preparation device for testing the interfacial strength of polyimide fibers as described in claim 1, characterized in that: A second spacing roller (8) is provided between the first oven (3) and the resin treatment device (4).

9. The rapid sample preparation device for testing the interfacial strength of polyimide fibers as described in claim 1, characterized in that: A third spacing roller (9) is provided between the resin treatment device (4) and the second oven (5).

10. A rapid polyimide fiber interfacial strength test specimen preparation apparatus as defined in claim 1, wherein: A fourth spacing roller (10) is provided between the second drying oven (5) and the winding roller (6).

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