Prepreg belt yarn guide wheel tool

Abstract

The utility model discloses a prepreg tape yarn guide wheel tool, and relates to the technical field of hydrogen storage cylinders. The prepreg tape yarn guide wheel tool comprises a first yarn guide wheel, a second yarn guide wheel and a baffle, the baffle is used for fixing the first yarn guide wheel and the second yarn guide wheel, and the first yarn guide wheel and the second yarn guide wheel are arranged on one side of the baffle in parallel. At least two grooves are formed in the first yarn guide wheel, and the adjacent grooves are separated by edges; the groove is used for winding and conveying a prepreg tape; compared with the first yarn guide wheel, the second yarn guide wheel is further provided with an edge staggering area close to the baffle. According to the utility model, the staggered edge areas are arranged, and a plurality of grooves are formed in the yarn guide wheel, so that a plurality of strands of prepreg tapes can be uniformly wound on the gas cylinder, and the lap joint width between different strands of prepreg tapes is narrow, thereby being beneficial to reducing the mass of the gas cylinder.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen storage cylinders, and in particular to a pre-impregnated tape yarn guiding wheel tooling. Background Technique

[0002] Hydrogen storage cylinders have a development history of more than 50 years and are divided into four types: all-metal cylinders (type I), metal inner liner fiber circumferentially wound cylinders (type II), metal inner liner fiber fully wound cylinders (type III), and non-metal inner liner fiber fully wound cylinders (type IV). The weights of type I and type II cylinders are relatively large, making it difficult to meet the requirements of hydrogen storage density per unit mass. Compared with type III cylinders, type IV cylinders generally adopt a manufacturing method of a non-metal inner liner such as plastic plus carbon fiber winding, making the cylinders have the advantages of lighter weight, lower cost, and higher hydrogen storage density per unit mass, and are increasingly widely used in the aerospace and civilian fields.

[0003] 70MPa cylinders mainly consist of two parts: an inner liner and a composite layer. The forming of the composite layer mainly has two methods: wet winding forming and dry winding forming. Wet winding means that the fiber is impregnated with resin online and then wound on the surface of the cylinder. This method has the disadvantages of large resin waste, poor operating environment, and difficult control of resin content; dry winding means that pre-impregnated tape is directly wound on the surface of the cylinder to form, without involving the impregnation process, and has the advantages of controllable resin content, high production efficiency, and environmental friendliness, is suitable for mass production of 70MPa cylinders, and has a broader market space.

[0004] Currently, in the dry winding process, multiple strands of pre-impregnated tape are generally wound simultaneously. Due to the relatively high resin viscosity of the pre-impregnated tape, the fibers are not easily unfolded during the winding process, resulting in easy bifurcation of different strands of pre-impregnated tape during the winding process, causing uneven distribution of the composite layer fibers and affecting the performance of the cylinder. The traditional solution is to increase the overlap width between different strands of pre-impregnated tape, but increasing the overlap width will reduce the hydrogen storage density per unit mass. Summary of the Utility Model

[0005] The main purpose of the utility model is to provide a pre-impregnated tape yarn guiding wheel tooling to solve the problems in the prior art that the pre-impregnated tape is prone to bifurcation during the winding process, resulting in poor winding effect in the cylinder and low hydrogen storage density.

[0006] To achieve the above purpose, according to the first aspect of the utility model, a pre-impregnated tape yarn guiding wheel tooling is provided, which includes a first yarn guiding wheel, a second yarn guiding wheel, and a baffle; wherein, the baffle is used to fix the first yarn guiding wheel and the second yarn guiding wheel, and the first yarn guiding wheel and the second yarn guiding wheel are arranged in parallel on one side of the baffle; at least two grooves are arranged on the first yarn guiding wheel, and adjacent grooves are separated by edges; the grooves are used for winding and conveying the pre-impregnated tape; compared with the first yarn guiding wheel, the second yarn guiding wheel is also provided with a misalignment area close to the baffle.

[0007] Further, the width of the groove is 1.05 - 1.1 times the width of the prepreg tape; the width of the staggered area is less than the width of the groove; the width of the edge is less than the width of the staggered area.

[0008] Further, the width of the staggered area is 0.7 - 1 times the width of the prepreg tape; and / or, the width of the edge is 0.7 - 1 times the width of the prepreg tape.

[0009] Further, N fixing sites are provided on the baffle for adjusting the positions of the first yarn guiding wheel and / or the second yarn guiding wheel, where N is an integer greater than 2.

[0010] Further, an anti-corrosion coating is applied on both the first yarn guiding wheel and the second yarn guiding wheel.

[0011] Further, the thickness of the anti-corrosion coating is 95 - 105 μm.

[0012] Further, the material of the anti-corrosion coating includes epoxy resin material.

[0013] Applying the technical solution of the present utility model, by arranging two parallel yarn guiding wheels on the same baffle and providing a staggered area on one of the yarn guiding wheels, the prepreg tapes on the first yarn guiding wheel and the second yarn guiding wheel can be staggered by a certain distance, improving the overlapping distance between different strands of prepreg tapes, thereby reducing the stacking weight of the prepreg tapes and increasing the hydrogen storage density; in addition, by arranging two yarn guiding wheels and providing a plurality of grooves thereon, the prepreg tapes can be prevented from sticking to each other and splitting, which may affect their winding effect in the hydrogen storage cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic diagram of the prepreg tape yarn guiding wheel tooling in Embodiment 1 of the present utility model;

[0015] The following reference numerals exist in the above drawings:

[0016] 10. First yarn guiding wheel; 20. Second yarn guiding wheel; 30. Baffle; 1. Groove; 2. Edge; 3. Staggered area. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below. Those not specified in the embodiments are carried out according to conventional conditions or conditions recommended by the manufacturer. The reagents or instruments not specified by the manufacturer are all conventional products that can be obtained through commercial purchase.

[0018] For hydrogen storage cylinders, the composite layer is usually formed by dry winding. Dry winding generally involves winding multiple strands of prepreg tapes on a yarn guide wheel tooling at the same time, which helps to improve production efficiency. However, the viscosity of the prepreg tape resin is relatively high, and adjacent prepreg tapes will adhere to each other, causing the fibers to split and affecting the winding effect. To solve this problem, the overlap width of adjacent prepreg tapes is usually increased, but this will affect the mass hydrogen storage density. In order to solve the above technical problems, in a typical embodiment of the utility model, a prepreg tape yarn guide wheel tooling is provided. Figure 1 It is a structural schematic diagram, which includes a first guide wheel 10, a second guide wheel 20, and a baffle 30; wherein the baffle 30 is used to fix the first guide wheel 10 and the second guide wheel 20, and the first guide wheel 10 and the second guide wheel 20 are arranged in parallel on one side of the baffle 30; at least two grooves 1 are arranged on the first guide wheel 10, and adjacent grooves 1 are separated by edges 2; the grooves 1 are used for winding and conveying prepreg tape; compared with the first guide wheel 10, the second guide wheel 20 is also provided with a staggered edge area 3 close to the baffle 30.

[0019] The utility model arranges two parallel yarn guide wheels on the baffle 30 and limits the number of grooves on the yarn guide wheels, so that at least four strands of prepreg tapes can be wound around the gas cylinder at the same time, and different strands of prepreg tapes are located in different grooves, respectively, and the interference between them is small; in addition, by setting the staggered area, the overlap width of different strands of prepreg tapes in the first yarn guide wheel 10 and the second yarn guide wheel 20 can be reduced, and the hydrogen storage density per unit mass can be increased. The small interference between adjacent prepreg tapes also helps to improve the winding effect, so that the fibers in the prepreg tapes can be evenly wound around the inner liner of the gas cylinder.

[0020] In a preferred embodiment of the utility model, the width of the groove 1 is 1.05-1.1 times the width of the prepreg tape; the width of the staggered area 3 is smaller than the width of the groove 1; the width of the edge 2 is smaller than the width of the staggered area 3. The widths of the groove 1, staggered area 3, and edge 2 are limited on the one hand to fix the prepreg tape and reduce its degree of deviation, and on the other hand to make the prepreg tape easier to transport out without the problem of getting stuck in the slot, improve the winding efficiency and winding uniformity, help the inner liner of the gas cylinder to be completely wound by the fiber, and improve the strength of the gas cylinder.

[0021] In a preferred embodiment of the present invention, the width of the staggered area 3 is 0.7 to 1 times the width of the prepreg tape; and / or the width of the edge 2 is 0.7 to 1 times the width of the prepreg tape. Controlling the width of the staggered area 3 or the edge 2 is to improve the strength of the gas cylinder on the one hand, and to further improve the mass hydrogen storage density of the gas cylinder on the other hand.

[0022] In a preferred embodiment of the present utility model, N fixing sites are provided on the baffle for adjusting the positions of the first yarn guiding wheel 10 and / or the second yarn guiding wheel 20. N is an integer greater than 2 to complete the winding of different parts of the gas cylinder. Among them, the fixing sites can be bolt holes, and the first yarn guiding wheel 10 and the second yarn guiding wheel 20 can be bolted to different fixing sites on the baffle; alternatively, the first yarn guiding wheel 10 and the second yarn guiding wheel 20 are fixed to different fixing sites on the baffle 30 through bearings.

[0023] In a preferred embodiment of the present utility model, anti-corrosion coatings are applied on both the first yarn guiding wheel 10 and the second yarn guiding wheel 20. The material of the anti-corrosion coating includes epoxy resin material, which has excellent properties such as wear resistance, high temperature resistance, and chemical resistance, and can provide long-term protection for metal materials.

[0024] The commonly used material for the yarn guiding wheel at present is aluminum alloy, but the aluminum alloy material is prone to chemical or electrochemical corrosion with the medium in the air environment. Pitting corrosion on the surface of the yarn guiding wheel will damage the fibers in dry winding, which may cause uneven winding of the inner liner and reduce the mechanical properties of the gas cylinder. Setting an anti-corrosion coating on the surface of the yarn guiding wheel helps to extend the service life of the yarn guiding wheel and further improve the winding quality.

[0025] In a preferred embodiment of the present utility model, the thickness of the anti-corrosion coating is 95 - 105 μm.

[0026] Controlling the thickness of the anti-corrosion coating is for one thing to make it have good anti-corrosion performance, and for another thing to improve the bonding strength between the coating and the yarn guiding wheel.

[0027] In a preferred embodiment of the present utility model, the preparation method of the anti-corrosion coating includes the following steps:

[0028] Prepare urea-formaldehyde resin microcapsules with lubricating oil as the core material by in-situ polymerization method;

[0029] Graft polydopamine and polyethyleneimine on the surface of the urea-formaldehyde resin microcapsules with lubricating oil as the core material in sequence to obtain surface-modified urea-formaldehyde resin microcapsules;

[0030] Add the surface-modified urea-formaldehyde resin microcapsules into the graphene oxide dispersion liquid, and obtain double-walled microcapsules through electrostatic adsorption and hydrogen bond interaction;

[0031] Disperse the double-walled microcapsules into epoxy resin and water, then add a curing agent until the curing agent is completely dissolved to obtain a mixture, and coat the mixture on the surfaces of the first yarn guiding wheel 10 and the second yarn guiding wheel 20 to form an anti-corrosion coating.

[0032] By adopting the above method to prepare the anti-corrosion coating, when the coating is damaged due to friction, the core material lubricating oil will be released through siphon action and fill the damaged area, improving wear resistance; in addition, by adding graphene oxide, its lamellar structure can effectively block the progress of the electrochemical reaction, thereby achieving the anti-corrosion effect and being beneficial to further improving the winding uniformity. In the present utility model, polydopamine and polyethyleneimine are successively grafted on the surface of urea-formaldehyde resin microcapsules with lubricating oil as the core material. On the one hand, it can make the negatively charged graphene oxide undergo electrostatic adsorption with the positively charged PDA-PEI modified urea-formaldehyde resin microcapsules, and the two-dimensional lamellar structure inhibitor GO blocks the corrosion ions from entering the metal surface to cause electrochemical corrosion; on the other hand, the adsorption effect of PEI can inhibit the transfer of iron oxidation electrons to the outside of the coating, making it difficult for the metal to corrode; as time passes, when the metal under the coating turns into metal oxide, the amino group on PEI can form a chelate with the metal oxide, so that there is a chelation bond between the coating and the metal, forming a secondary protection and increasing the interaction between the coating and the substrate, that is, extending the service life of the coating. And when there is reducing hydrogen present, metal ions can also be reduced to metal particles, hindering the corrosion of the metal substrate and enhancing the service life of the yarn guide wheel.

[0033] In a preferred embodiment of the present utility model, the in-situ polymerization method comprises the following steps:

[0034] Add a surfactant to water to obtain a surfactant solution;

[0035] Add urea, an initiator, a crosslinking agent, and a lubricating oil to the surfactant solution, adjust the pH value to acidic, and obtain a mixture;

[0036] Add a formaldehyde solution to the mixture, raise the temperature to 50 - 60 °C, keep warm for 3 - 5 h, and then dry to obtain urea-formaldehyde resin microcapsules with lubricating oil as the core material.

[0037] Typical but not limited, the surfactant is at least one of sodium dodecyl sulfate and polyvinyl alcohol; preferably, the surfactant is a compound of sodium dodecyl sulfate and polyvinyl alcohol, and the mass ratio of the sodium dodecyl sulfate to the polyvinyl alcohol is 5:(2 - 4).

[0038] Typical but not limited, the lubricating oil is at least one of castor oil, tung oil, and jatropha oil; preferably castor oil.

[0039] Typical but not limited, the initiator is ammonium chloride, and the crosslinking agent is resorcinol.

[0040] In a preferred embodiment of the present utility model, in the mixed solution, the mass ratio of the surfactant, urea, initiator, crosslinking agent, and lubricating oil is: (5-10):(0.5-1.5):(0.5-1.5):(0.5-1.5):(1-3). In a preferred embodiment of the present utility model, the pH value of the mixed solution is 3.0 - 4.0; and / or, stirring is continuously carried out during the above reaction process.

[0041] Under the above conditions, it is easier to form urea-formaldehyde resin microcapsules with lubricating oil as the core material.

[0042] In a preferred embodiment of the present utility model, the preparation method of the surface-modified urea-formaldehyde resin microcapsules includes the following steps:

[0043] Dissolve tris(hydroxymethyl)aminomethane hydrochloride in water to obtain a buffer solution with a pH value of 8 - 10;

[0044] Dissolve dopamine hydrochloride in the buffer solution, then add the above urea-formaldehyde resin microcapsules with lubricating oil as the core material. Dopamine polymerizes on the surface of the urea-formaldehyde resin microcapsules with lubricating oil as the core material to form polydopamine, and then add a polyethyleneimine solution to carry out a grafting reaction to obtain surface-modified urea-formaldehyde resin microcapsules.

[0045] In a preferred embodiment of the present utility model, the mass ratio of the urea-formaldehyde resin microcapsules with lubricating oil as the core material, dopamine hydrochloride, and polyethyleneimine is (8-16):(1-3):1. Relative to 2 - 5 mL of 5 wt% GO aqueous solution, the dosage of the surface-modified urea-formaldehyde resin microcapsules is 1 - 2 g.

[0046] Defining the mass ratios of the various components as above can increase the loading amount of graphene oxide, improve wear resistance, improve the winding effect of the prepreg tape, and reduce the fiber breakage and bifurcation rate.

[0047] In a preferred embodiment of the present utility model, the mass ratio of epoxy resin, double-walled microcapsules, and curing agent is 100:(1-5):(15-25). Under the above conditions, the anti-corrosion durability of the anti-corrosion coating is better. The following further describes the present application in detail with specific examples, and these examples should not be construed as limiting the scope claimed by the present application.

[0048] Information on some materials in the examples and comparative examples is as follows:

[0049] Yarn guide wheel: aluminum alloy;

[0050] Prepreg tape: impregnate carbon fiber bundles in epoxy resin to form a prepreg tape. The weight fraction of epoxy resin in the prepreg tape is 25%;

[0051] Epoxy resin: Specification: 6520-WH-53A; Origin: Hanson, USA; EPIKOTE 3520-WY-55A;

[0052] Curing agent: Polyamine curing agent, Specification: 8545-W-52; Origin: Hanson, USA; EPIKURE8537-MY-60.

[0053] Example 1

[0054] An embodiment of the pre-impregnated tape yarn guiding wheel tooling of the present utility model. The structural schematic diagram of the pre-impregnated tape yarn guiding wheel tooling is as Figure 1 shown. It includes a first yarn guiding wheel 10, a second yarn guiding wheel 20, and a baffle 30. The baffle 30 is used to fix the first yarn guiding wheel 10 and the second yarn guiding wheel 20. The first yarn guiding wheel 10 and the second yarn guiding wheel 20 are arranged in parallel on one side of the baffle 30; two grooves 1 are provided on the first yarn guiding wheel 10, and adjacent grooves 1 are separated by a ridge 2; the grooves 1 are used for winding and conveying the pre-impregnated tape; compared with the first yarn guiding wheel 10, the second yarn guiding wheel 20 is also provided with a misalignment area close to the baffle 30.

[0055] The width of its misalignment area is 0.9 times the width of the pre-impregnated tape, the width of the ridge is 0.85 times the width of the pre-impregnated tape, and the width of the groove is 1.05 times the width of the pre-impregnated tape.

[0056] Examples 2-4

[0057] Embodiments of the pre-impregnated tape yarn guiding wheel tooling of the present utility model. The differences between Examples 2-4 and Example 1 are only that the widths of the misalignment area, the ridge, and the groove are different, specifically as follows:

[0058] In Example 2, the width of the misalignment area is 1 time the width of the pre-impregnated tape, the width of the ridge is 0.95 times the width of the pre-impregnated tape, and the width of the groove is 1.1 times the width of the pre-impregnated tape;

[0059] In Example 3, the width of the misalignment area is 0.8 times the width of the pre-impregnated tape, the width of the ridge is 0.7 times the width of the pre-impregnated tape, and the width of the groove is 1.03 times the width of the pre-impregnated tape;

[0060] In Example 4, the width of the misalignment area is 0.65 times the width of the pre-impregnated tape, the width of the ridge is 0.5 times the width of the pre-impregnated tape, and the width of the groove is 1.1 times the width of the pre-impregnated tape;

[0061] Performance test:

[0062] Use a unidirectional plate with a simple winding trajectory to identify voids. At the same time, manufacture a 57L type IV high-pressure hydrogen storage cylinder (nominal working pressure is 70 MPa) with a designed burst pressure of 185 ± 10% MPa using the same winding procedure, and observe the voids generated in the gas cylinder and the morphology of the fibers in the composite layer made of the pre-impregnated tape.

[0063] 1. Optical microscopes (VH-X8000, Keyence and Eclipse L150, Nikon)

[0064] Cut the unidirectional board and the composite material of the hydrogen storage cylinder into small pieces of 7.5 mm×7.5 mm, and observe their cross-sections and internal structures. Polish them with abrasive compounds in front of the optical microscope to observe the morphology of the cross-section.

[0065] 2. Burst test

[0066] Paste strain gauges on the surface of the gas cylinder according to the "Operation Instruction for Connecting Strain Gauges of Hydrogen Storage Cylinders" to detect the strain data of the cylinder body and the head area during the pressurization process of the gas cylinder;

[0067] Connect the adapter and the gas cylinder to the hydraulic burst test system, drain the air in the equipment, the adapter and the pipeline, and seal the tail end of the gas cylinder; conduct a water pressure burst test at room temperature according to the test method specified in GB / T 15385. During the pressurization process, when the test pressure exceeds 1.5 times the nominal pressure, the pressure increase rate shall not be greater than 1.4 MPa / s; if the pressure increase rate is less than or equal to 0.35 MPa / s, the pressure can be increased until bursting; if the pressure increase rate is greater than 0.35 MPa / s and less than 1.4 MPa / s, if the gas cylinder is between the pressure source and the pressure measuring device, the pressure can be increased until bursting, otherwise it shall be kept pressurized at the minimum bursting pressure for at least 5 s and then the pressure can be continued to be increased until bursting.

[0068] 3. Mass hydrogen storage density

[0069] Calculate the hydrogen density at 70 MPa and room temperature according to the P-R equation, which is 40 kg / m 3 , the volume of hydrogen is 57 L, and the mass of hydrogen is calculated to be 2.28 kg; weigh the weight of the type-IV hydrogen storage cylinder of 70 MPa - 57 L with an electronic scale, and the mass hydrogen storage density = 2.28 / the weight of the gas cylinder × 100%.

[0070] Test results:

[0071] Table 1 shows the performance test results of Examples 1 to 4:

[0072] Table 1

[0073]

[0074] As can be seen from Table 1, when the dry pre-impregnated tape yarn guiding wheel tooling of the present utility model is used to wind the hydrogen storage cylinder, the winding uniformity is relatively good, the burst pressure of the 70MPa-57L type IV hydrogen storage cylinder prepared is relatively high, the mass hydrogen storage density can reach more than 5.5wt%, and the amount of pre-impregnated tape used is less. It has comprehensive performance advantages such as lightweight, long life, high safety, and low cost, and is suitable for various scenarios and fields such as fuel cell passenger cars, commercial vehicles (heavy trucks, bus coaches, cold chain logistics vehicles), and ships.

[0075] Example 5

[0076] An embodiment of the pre-impregnated tape yarn guiding wheel tooling of the present utility model. The difference between the pre-impregnated tape yarn guiding wheel tooling of this embodiment and that of Example 1 is only that an anti-corrosion coating is prepared on the surfaces of the first yarn guiding wheel 10 and the second yarn guiding wheel 20 of this embodiment. The specific preparation method is as follows:

[0077] (1) Add 5 mL of an aqueous solution with a 1% mass fraction of sodium dodecyl sulfate and 3 mL of an aqueous solution with a 5% mass fraction of polyvinyl alcohol to a flask containing 75 mL of deionized water. Use a magnetic stirrer to stir the mixed solution for 5 minutes to form a surfactant solution;

[0078] (2) Add 0.15 g of ammonium chloride, 1.5 g of urea, 0.15 g of m-diphenol, and 3 g of castor oil to the surfactant solution in sequence, and adjust the pH value to 3.5 to obtain a mixed solution;

[0079] (3) Add 3.8 g of a formaldehyde solution with a 37 wt% formaldehyde concentration to the mixed solution to start the reaction. At the same time, gradually raise the temperature to 55 °C and react for 4 hours, and then dry at 50 °C for 12 hours to obtain urea-formaldehyde resin microcapsules with castor oil as the core material;

[0080] (4) Dissolve 0.12 g of tris(hydroxymethyl)aminomethane hydrochloride in 100 mL of deionized water, and adjust the pH value to 8-10 to obtain a buffer solution;

[0081] (5) Add 0.24 g of hydrochloric acid dopamine to the buffer solution. After quickly stirring and dissolving, add 1.5 g of urea-formaldehyde resin microcapsules with castor oil as the core material, pour it into a three-necked flask, and mechanically stir for 0.5 h. Then, dopamine gradually polymerizes and grafts onto the surface of the microcapsules. Then add 0.12 g of a polyethyleneimine solution with a 50% mass fraction of polyethyleneimine, and continue to stir for 3 h. After filtering and washing the solution, surface-modified urea-formaldehyde resin microcapsules are obtained;

[0082] (6) Add 10 mL of a GO dispersion with a GO concentration of 2 mg / mL to 100 mL of deionized water, and ultrasonically disperse it for 10 min to obtain a graphene oxide solution;

[0083] (7)Disperse the surface-modified urea-formaldehyde resin microcapsules in the above graphene oxide solution, stir and react at a speed of 300 rpm for 6 h, so that electrostatic adsorption occurs between the positively charged PEI and the negatively charged GO. At the same time, the hydroxyl groups on the surface of PDA and the active functional groups on the surface of GO can be connected by forms such as hydrogen bonds. Finally, filter the solution, wash it three times repeatedly with deionized water and ethanol until the upper liquid is clear and transparent, and freeze-dry for 2 h to obtain double-walled microcapsules;

[0084] (8)Perform sandblasting treatment on the first yarn guide wheel 10 and the second yarn guide wheel 20, then ultrasonically treat them in an acetone solution for 30 min, rinse them with absolute ethanol, and then place them in an oven for later use;

[0085] (9)Mix epoxy resin, double-walled microcapsules and deionized water, stir with a bench drill, then add a curing agent and stir for 5 min until the curing agent is completely dissolved in the resin. The mass ratio of the epoxy resin, double-walled microcapsules and curing agent is 100:3:20; then spray the first yarn guide wheel 10 and the second yarn guide wheel 20, and the thickness of the coating is 100 ± 5 microns.

[0086] Test method:

[0087] 1. Salt spray test

[0088] In the experiment simulating salt spray, place the waterborne microcapsule composite coating sample in a salt spray chamber at 35 °C. Seal the metal periphery with paraffin, and control the thickness of the coating within 100 ± 5 μm. The air source should be greater than 4 kg / cm 2 , and adjust the salt spray pressure to between 0.5 and 1.7 kg / cm 2 . Observe the surface change of the waterborne microcapsule composite coating.

[0089] 2. Electrochemical test (EIS)

[0090] In this experiment, an Autolab electrochemical workstation produced by Metrohm AG of Switzerland was used, and the program parameters were set in the program with the application program Nova 2.1 as follows: Adjust the test voltage on the instrument screen according to the inserted reference electrode and platinum electrode; the test frequency range is 100000 Hz to 0.01 Hz. The electrochemical impedance spectrum was fitted using ZSimpwin impedance analysis software. The electrolytic cell adopted a three-electrode system, the coating specimen was used as the working electrode, the saturated calomel electrode was used as the reference electrode, and a platinum electrode with a specification of 20 × 20 × 0.2 mm was used as the auxiliary electrode. In order to understand the failure process of the coating, the impedance spectra of the coating at different immersion times were measured.

[0091] Test results:

[0092] 1. The salt spray test results show that the anti-corrosion coating in Example 6 has less blistering and rust, and the corrosion width seems to have a tendency to shrink and heal, showing a certain self-healing property.

[0093] 2. The EIS results indicate that the impedance value Z of the anti-corrosion coating in Example 6 f＝0.01Hz can reach up to 3.48×10 8 Ω·cm 2 , showing good anti-corrosion performance.

[0094] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A pre-impregnated tape yarn guiding wheel tooling, characterized in that, It includes a first yarn guide wheel (10), a second yarn guide wheel (20), and a baffle (30). The baffle (30) is used to fix the first yarn guide wheel (10) and the second yarn guide wheel (20). The first yarn guide wheel (10) and the second yarn guide wheel (20) are arranged in parallel on one side of the baffle (30). At least two grooves (1) are provided on the first yarn guide wheel (10), and adjacent grooves (1) are separated by a ridge (2). The grooves (1) are used for winding and conveying the prepreg tape. Compared with the first yarn guide wheel (10), a misalignment area (3) is further provided on the second yarn guide wheel (20) close to the baffle (30).

2. The pre-impregnated tape yarn guiding wheel tooling according to claim 1, characterized in that, The width of the groove (1) is 1.05 - 1.1 times the width of the prepreg tape; the width of the misalignment area (3) is smaller than the width of the groove (1); the width of the ridge (2) is smaller than the width of the misalignment area (3).

3. The pre-impregnated tape yarn guiding wheel tooling according to claim 2, wherein, The width of the misalignment area (3) is 0.7 - 1 times the width of the prepreg tape; and / or, the width of the ridge (2) is 0.7 - 1 times the width of the prepreg tape.

4. The pre-impregnated tape yarn guiding wheel tooling according to claim 1, wherein, N fixing points are provided on the baffle (30) for adjusting the positions of the first yarn guide wheel (10) and / or the second yarn guide wheel (20); N is an integer greater than 2.

5. The pre-impregnated tape yarn guiding wheel tooling according to any one of claims 1 to 4, characterized in that, Anticorrosion coatings are applied on both the first yarn guide wheel (10) and the second yarn guide wheel (20).

6. The pre-impregnated tape yarn guiding wheel tooling according to claim 5, characterized in that The thickness of the anticorrosion coating is 95 - 105 μm.

7. The pre-impregnated tape yarn guiding wheel tooling according to claim 5, characterized in that, The material of the anticorrosion coating includes epoxy resin material.

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