Horse hook and preparation method thereof

Abstract

The invention provides a horse hook which comprises a horse hook green body and a nano silicon coating compounded on the surface of the horse hook green body, and the nano silicon coating is prepared from the following raw materials in percentage by mass: 10-20% of polydimethylsiloxane, 1-10% of a cross-linking agent, 0.5-5% of hydrophobic modified nano silicon dioxide, 0.5-5% of hydrophilic modified nano silicon dioxide and the balance of water. 0.1-10% of a surfactant, 10-30% of a solvent and 20-60% of solvent oil. A nano silicon coating with an oleophobic effect is sprayed on the surface of the horse hook, so that the adhesive force of the paint is greatly reduced. In the zipper opening and closing process, paint on the surface of the horse hook needle point can be scraped by zipper teeth, so that the size of the horse hook needle point is smaller than zipper tooth gaps, and the puller is prevented from losing lock.

Description

Technical Field

[0001] The present invention belongs to the technical field of clothing accessories, and particularly relates to a hook and a preparation method thereof. Background Art

[0002] An automatic lock slider is a slider designed to lock the position of the slider when the pull tab is not pulled up, preventing the zipper from accidentally opening and closing. Its principle is that through the elastic piece pressure inside the slider, the tip of the hook passes through the locking hole and is buckled into the middle of the chain teeth, so as to achieve the purpose of limiting and locking. Therefore, the size of the hook needs to match the width of the chain tooth gap.

[0003] In order to make the slider beautiful, sliders on the market often adopt a painting process to endow the slider with various appearances. Currently, the painting processes for sliders on the market mainly include roller spraying, hand spraying, and cold spraying. The inner cavities of the sliders prepared by these processes are all sprayed with paint, forming a paint layer on the surface of the hook. Especially for some light-colored and fluorescent painted sliders, the spraying time is relatively long, and the paint layer is relatively thicker than that of dark colors. And due to sagging at the tip of the hook, the size of the tip of the hook often increases and cannot fall into the chain tooth gap, resulting in the unlocking of the slider. See Figure 1 , Figure 1 which is a structural schematic diagram of the existing hook and chain teeth. And the cured paint cannot be easily removed, and often needs to be scraped off with a blade, which is time-consuming and laborious.

[0004] Therefore, providing a hook whose paint layer on the surface of the hook tip can be scraped off by the chain teeth during the opening and closing process of the zipper has become a problem to be solved. Summary of the Invention

[0005] In view of this, the technical problem to be solved by the present invention is to provide a hook and a preparation method thereof. The hook provided by the present invention can have the paint layer on the surface of the hook tip scraped off by the chain teeth during the opening and closing process of the zipper, so that the size of the hook tip is smaller than the chain tooth gap, preventing the slider from unlocking.

[0006] The present invention provides a hook, including: a hook blank and a nano-silicon coating compounded on the surface of the hook blank. By mass percentage, the raw materials for preparing the nano-silicon coating include:

[0007]

[0008]

[0009] Install the hook onto the slider and spray paint the whole slider;

[0010] Install the slider onto the zipper. During the process of pulling the slider, at least part of the paint on the contact part between the hook and the teeth is scraped off by the zipper teeth.

[0011] Preferably, the particle size of the hydrophobically modified nano-silica is 5-40 nm.

[0012] Preferably, the particle size of the hydrophilic modified nano-silica is 5-30 nm.

[0013] Preferably, the surfactant is selected from one or more of glyceryl monolaurate, isopropyl myristate, butyl palmitate, and dilaurate;

[0014] The crosslinking agent is selected from tetramethoxysilane and / or tetraethoxysilane.

[0015] Preferably, the solvent is selected from one or more of n-hexane, cyclohexane and No. 6 solvent oil;

[0016] The solvent oil is selected from one or more of 120# solvent oil, D80 solvent oil, and D40 solvent oil.

[0017] Preferably, the thickness of the nano-silicon coating is 3-20 μm.

[0018] The present invention also provides a method for preparing the above-mentioned horse hook, comprising the following steps:

[0019] A) treating the horse hook blank to obtain a treated horse hook;

[0020] B) spraying a nano-silicon coating liquid on the surface of the treated horse hook and drying the sprayed nano-silicon coating to form a nano-silicon coating on the surface of the horse hook blank;

[0021] C) Repeat step B) to get a horse hook.

[0022] Preferably, step A) comprises:

[0023] A1) immersing the shavings body in an ultrasonic cleaning machine containing a degreasing agent to remove oil from the surface by ultrasonic cleaning;

[0024] A2) removing the degreasing agent on the surface of the hook body to obtain a treated hook.

[0025] Preferably, the method for preparing the spray-coated nano-silicon coating liquid comprises the following steps:

[0026] After polydimethylsiloxane and a solvent are mixed and stirred, tetraethoxysilane and a surfactant are added, and the mixture is stirred again. Then, hydrophobic nano-silicon dioxide and hydrophilic nano-silicon dioxide are added and mixed, and finally, solvent oil is added to obtain a nano-silicon coating liquid.

[0027] Preferably, the drying temperature is 140-200°C, and the drying time is 20-40 minutes;

[0028] The number of repetitions is 2 to 5 times.

[0029] Compared with the prior art, the present invention provides a hook, comprising: a hook blank and a nano-silicon coating compounded on the surface of the hook blank. In terms of mass percentage, the preparation raw materials of the nano-silicon coating include: 10-20% of polydimethylsiloxane, 1-10% of crosslinking agent, 0.5-5% of hydrophobic modified nano-silica, 0.5-5% of hydrophilic modified nano-silica, 0.1-10% of surfactant, 10-30% of solvent, and 20-60% of solvent oil; the hook is installed on the slider, and the whole slider is painted; the slider is installed on the zipper, and during the process of pulling the slider, at least part of the paint on the contact part between the hook and the teeth is scraped off by the zipper teeth. The present invention sprays a nano-silicon coating with oil-repellent effect on the surface of the hook, greatly reducing the paint adhesion. During the opening and closing process of the zipper, the paint on the tip surface of the hook will be scraped off by the chain teeth, so that the size of the hook tip is smaller than the chain tooth gap, preventing the slider from unlocking. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic structural diagram of a conventional hook and chain teeth;

[0031] Figure 2 is a schematic structural diagram of the hook and chain teeth provided by the present invention;

[0032] Figure 3 is a photo of the hook prepared in Example 1 before threading the slider;

[0033] Figure 4 is a photo of the hook prepared in Example 1 after threading the slider;

[0034] Figure 5 is a photo of the nano-silicon coating liquid prepared in Example 1 sprayed on the surface of tinplate;

[0035] Figure 6 is a photo of the hook prepared in Comparative Example 1 before threading the slider;

[0036] Figure 7 is a photo of the hook prepared in Comparative Example 1 after threading the slider;

[0037] Figure 8 is a photo of conventional paint sprayed on the surface of tinplate;

[0038] Figure 9 is an electron microscope image of the nano-silicon coating on the surface of the hook prepared in Example 1. DETAILED DESCRIPTION OF THE INVENTION

[0039] The present invention provides a hook, comprising: a hook blank and a nano-silicon coating compounded on the surface of the hook blank. In terms of mass percentage, the preparation raw materials of the nano-silicon coating include:

[0040]

[0041] Install the said hook to the slider, and paint the whole slider;

[0042] Install the said slider to the zipper. During the process of pulling the slider, at least part of the paint on the contact part between the hook and the teeth of the zipper is scraped off by the teeth of the zipper.

[0043] The hook provided by the present invention includes a hook blank, and the hook blank can be made of brass, cupronickel, or stainless steel. In the present invention, brass is preferably used.

[0044] The hook provided by the present invention further includes a nano-silicon coating compounded on the surface of the hook blank.

[0045] In the present invention, the raw materials for preparing the nano-silicon coating include 10-20% of polydimethylsiloxane, which can be 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, or any value between 10-20%.

[0046] The raw materials for preparing the nano-silicon coating further include 1-10% of a cross-linking agent, which can be 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, or any value between 1-10%. The cross-linking agent is selected from tetramethoxysilane and / or tetraethoxysilane.

[0047] The raw materials for preparing the nano-silicon coating further include 0.5-5% of hydrophobically modified nano-silica, which can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, or any value between 0.5-5%. The particle size of the hydrophobically modified nano-silica is 5-40 nm.

[0048] The raw materials for preparing the nano-silicon coating further include 0.5-5% of hydrophilically modified nano-silica, which can be 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, or any value between 0.5-5%. The particle size of the hydrophilically modified nano-silica is 5-30 nm.

[0049] Since the raised structure formed after the dispersion of a single modified silica is too small, the reduction of adhesion is not obvious. Therefore, in the present invention, hydrophilically modified silica and hydrophobically modified silica are added simultaneously, which can increase the aggregation degree of silica, make the surface raised structure more and larger, and thus increase the roughness of the coating.

[0050] The raw materials for preparing the nano-silicon coating further include 0.1-10% of a surfactant, which can be 0.1%, 0.5%, 1%, 1.5%, 2%, 2.5%, 3%, 3.5%, 4%, 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%, 8%, 8.5%, 9%, 9.5%, 10%, or any value between 0.1-10%. In the present invention, the surfactant is selected from one or more of glycerol monolaurate, isopropyl myristate, butyl palmitate, and dilaurate. Preferably, the surfactant is selected from dilaurate.

[0051] The raw materials for preparing the nano-silicon coating further include 10-20% of a solvent, which can be 10%, 12%, 14%, 15%, 16%, 18%, 20%, or any value between 10-20%. The solvent is selected from one or more of n-hexane, cyclohexane, and solvent oil No. 6. Preferably, the solvent is selected from one or more of n-hexane and solvent oil No. 6.

[0052] The raw materials for preparing the nano-silicon coating further include 30-60% of a solvent oil, which can be 30%, 35%, 40%, 45%, 50%, 55%, 60%, or any value between 30-60%. The solvent oil is selected from one or more of solvent oil 120#, D80 solvent oil, and D40 solvent oil, and preferably is solvent oil 120#.

[0053] The thickness of the nano-silicon coating is 3-20 μm, which can be 3, 5, 7, 9, 10, 12, 14, 15, 16, 18, 20, or any value between 3-20 μm.

[0054] Install the above-mentioned hook with a nano-silicon coating onto the slider, and spray paint the entire slider;

[0055] Install the slider onto the zipper. During the process of pulling the slider, at least part of the spray paint on the contact part between the hook and the teeth is scraped off by the zipper teeth.

[0056] In some specific embodiments of the present invention, when the slider is lifted, part of the spray paint on the tip of the hook is scraped off by the keyhole.

[0057] Furthermore, after the slider is zipped and unzipped at least once, part of the paint on the contact part between the hook and the chain teeth is scraped off; in some other embodiments of the present invention, after the slider is zipped and unzipped 3 times, part of the paint on the contact part between the hook and the chain teeth is scraped off.

[0058] Even further, in some specific embodiments of the present invention, after the slider is zipped and unzipped at least 4 times, the paint on the surface of the hook is basically scraped clean; in some other embodiments of the present invention, after the slider is zipped and unzipped 5 times, the paint on the head of the hook is basically scraped clean;

[0059] In the present invention, the paint on the surface of the hook can be scraped off at the base after the hook is pulled 10 times.

[0060] The present invention uses polydimethylsiloxane as the main body to construct a low surface energy coating to achieve the purpose of reducing the paint adhesion. By adding modified nano-silica as a filler to polydimethylsiloxane, a micro-nano surface with a rough structure is constructed. It is difficult for the macromolecular resin in the paint to enter the cavities of the micro-nano structure, so as to reduce the contact area between the paint layer and the coating and further reduce the adhesion. Tetraethoxysilane, as a cross-linking agent, can hydrolyze and cross-link with polydimethylsiloxane to form a uniform film, and at the same time can improve the adhesion of the coating on the substrate.

[0061] See Figure 2 , Figure 2 which is a schematic structural diagram of the hook and the chain teeth provided by the present invention.

[0062] The present invention also provides a preparation method of the above-mentioned hook, including the following steps:

[0063] A) Processing the hook blank to obtain a processed hook;

[0064] B) Spraying and drying a nano-silicon coating solution on the surface of the processed hook to form a nano-silicon coating on the surface of the hook blank;

[0065] C) Repeating step B) to obtain the hook.

[0066] The present invention first processes the hook, specifically including the following steps:

[0067] A1) Immersing the hook blank in an ultrasonic cleaning machine filled with a degreasing agent and performing surface degreasing through ultrasonic cleaning;

[0068] A2) Removing the degreasing agent on the surface of the hook blank to obtain a processed hook.

[0069] Among them, the temperature of the ultrasonic cleaning is 20-30 °C, which can be 20, 22, 24, 25, 26, 28, 30, or any value between 20-30 °C. The time of the ultrasonic cleaning is 5 min. The present invention uses ultrasonic cleaning to remove the oil stain and dust on the surface of the hook to increase the adhesion of the nano-silicon coating.

[0070] In the present invention, the method for removing the degreasing agent from the surface of the hook blank can be to put the hook into a centrifugal dryer to thoroughly dry the surface liquid components. The centrifugal drying and drying can be carried out simultaneously, or the hook can be dried after centrifugal drying. Among them, the time for centrifugal drying is 5 - 10 min, which can be 5, 6, 7, 8, 9, 10, or any value between 5 - 10 min; the temperature of the drying tunnel is 100 - 120 °C, which can be 100, 105, 110, 115, 120, or any value between 100 - 120 °C; the time is 60 - 80 min, which can be 60, 65, 70, 75, 80, or any value between 60 - 80 min.

[0071] After obtaining the processed hook, a nano-silicon coating solution is sprayed on the surface of the processed hook.

[0072] Among them, the preparation method of the nano-silicon coating solution includes the following steps:

[0073] Mix polydimethylsiloxane with a solvent and stir, then add tetraethoxysilane and dilaurate, stir again, then add hydrophobic nano-silica and hydrophilic nano-silica for mixing, and finally add 120# solvent oil to obtain the nano-silicon coating solution.

[0074] Specifically, first mix and stir polydimethylsiloxane with a solvent for 2 - 5 min, then add tetraethoxysilane and dilaurate and stir for 2 - 5 min. The above mixing is preferably carried out in a stirrer. Then, add hydrophobic nano-silica and hydrophilic nano-silica for mixing. Among them, the mixing is preferably carried out by ultrasonic mixing, and the mixing time is preferably 15 - 30 min. Finally, add 120# solvent oil to obtain the nano-silicon coating solution.

[0075] In the present invention, the spraying is to place the processed hook in a drum, and while rotating the drum at room temperature, spray the nano-silicon coating solution so that the nano-silicon coating solution is evenly sprayed on the surface of the processed hook. Among them, the rotation speed of the drum is 20 - 50 Hz, which can be 20, 25, 30, 35, 40, 45, 50, or any value between 20 - 50 Hz; the spraying amount of the nano-silicon coating solution is 9 - 13 CC / min, which can be 9, 10, 11, 12, 13, or any value between 9 - 13 CC / min. Spraying while rotating the drum at room temperature can prevent the solvent from volatilizing too fast and the hooks from sticking to each other.

[0076] After spraying, drying is carried out. The temperature of the drying is 140 - 200 °C, which can be 140, 150, 160, 170, 180, 190, 200, or any value between 140 - 200 °C. The time of the drying is 20 - 40 minutes, which can be 20, 25, 30, 35, 40, or any value between 20 - 40 minutes.

[0077] In the present invention, after spraying is completed, the hook needs to be left standing and then dried. Among them, the time of leaving standing is 0.5 - 2 min, which can be 0.5, 1, 1.5, 2, or any value between 0.5 - 2 min. The drying is preferably baking.

[0078] After spraying is completed, the hook needs to be left standing to further surface-dry the surface nano-silicon coating, and then baked. During the baking process, the drum keeps rotating to prevent the hooks from sticking to each other. After drying, a nano-silicon coating is formed on the surface of the hook blank. According to the required thickness of the coating, the above steps of spraying and drying are repeated 2 - 5 times. Re-spray the hook to ensure that the thickness of the coating on the hook surface reaches the best oil-repellent effect.

[0079] In the present invention, a nano-silicon coating with an oil-repellent effect is sprayed on the surface of the hook, greatly reducing the paint adhesion. During the opening and closing process of the zipper, the paint on the tip surface of the hook will be scraped off by the chain teeth, so that the size of the tip of the hook is smaller than the gap between the chain teeth, preventing the slider from unlocking.

[0080] To further understand the present invention, the following is a description of the hook and its preparation method provided by the present invention in conjunction with embodiments. The protection scope of the present invention is not limited by the following embodiments.

[0081] The polydimethylsiloxane is the polydimethylsiloxane of Dow Corning 184;

[0082] The tetraethoxysilane is the tetraethoxysilane of model FD-Si28 purchased from Anhui Boiling Point New Materials Co., Ltd.;

[0083] The hydrophobic nano-silica is Evonik AEROSIL R 816;

[0084] The hydrophilic nano-silica is Evonik AEROSILA200;

[0085] The dilaurate is purchased from Shanghai Macklin Biochemical Co., Ltd.;

[0086] The n-hexane is purchased from Sinopharm Chemical Reagent Co., Ltd.;

[0087] The 120# solvent naphtha is purchased from Huizhou Wentian Cleaning Agent Co., Ltd.

[0088] Example 1

[0089] 1. Paint formula

[0090]

[0091] 2. Preparation process:

[0092] First, add 15 g of polydimethylsiloxane and 18 g of n - hexane to a stirrer and stir for 2 min. Then add 2 g of tetraethoxysilane and 2 g of dilaurate, and put them into the stirrer again and stir for 2 min. Finally, add 1.5 g of hydrophobic nano - silica and 1.5 g of hydrophilic nano - silica, place it in an ultrasonic machine and ultrasonicate for 15 - 30 min. Finally, add 60 g of 120# solvent naphtha to obtain the nano - silicon coating liquid.

[0093] 3. Preparation of the hook:

[0094] Step 1, degreasing and dust - removing of the hook: Immerse the hook in an ultrasonic cleaning machine filled with degreasing agent, and perform surface degreasing through ultrasonic cleaning. (25°C, cleaning for 5 min)

[0095] Step 2, drying: Put the hook into a spin dryer to thoroughly dry the surface moisture. (Spin - drying time 8 min, drying tunnel temperature 110°C, time 60 min)

[0096] Step 3, spraying on the hook: Place the hook in a drum, and while rotating the drum at room temperature, spray the nano - silicon coating liquid to evenly coat the surface of the hook. (Drum rotation speed 40 Hz, spraying volume 11 CC / minute)

[0097] Step 4, drying: After the hook with the nano - silicon coating sprayed on the surface is left standing for 1 min, place it in a drying device for drying, drying temperature 165°C, drying time 25 minutes.

[0098] Step 5, re - spraying: Repeat Steps 3 and 4 five times, and finally form a 10 - μm nano - silicon coating on the surface of the hook.

[0099] See Figure 3 , Figure 3 for the photo of the hook prepared in Example 1 before threading the pull - tab. It can be seen from Figure 3 that there is a relatively thick paint on the surface of the hook after spraying.

[0100] See Figure 9 , Figure 9 for the electron microscope image of the nano - silicon coating on the surface of the hook prepared in Example 1. It can be seen from Figure 9 that the coating on the surface of the hook has a rough structure.

[0101] Then, after assembling the pull - tab and conducting a painting test, observe the change of the coating on the surface of the hook after pulling the hook with the pull - tab closed three times. The results are shown in Figure 4 ,Figure 4 This is a photo of the hook prepared in Example 1 after threading the slider. It can be seen from Figure 4 that after threading the slider, the surface paint on the tip of the hook was scraped off by the teeth, revealing the nano-silicon coating on the surface of the hook.

[0102] The nano-silicon coating liquid was sprayed onto the surface of the tinplate, and the adhesion test grade in the area was equivalent to 0B. See Figure 5 , Figure 5 This is a photo of the nano-silicon coating liquid prepared in Example 1 sprayed onto the surface of the tinplate. It can be seen from Figure 5 that the paint could no longer form a film.

[0103] Example 2

[0104] 1. Paint formula

[0105]

[0106]

[0107] 2. Preparation process:

[0108] Same as Example 1

[0109] 3. Preparation of the hook:

[0110] Same as Example 1.

[0111] After assembling the slider and conducting the paint spraying test, after 5 times of zipping on the zipper, the paint on the tip of the hook all peeled off, meeting the process requirements.

[0112] Example 3

[0113]

[0114] 2. Preparation process:

[0115] First, add 15 g of polydimethylsiloxane and 15 g of No. 6 solvent oil to a stirrer and stir for 3 min. Then add 2 g of tetramethoxysilane and 3 g of glycerol monolaurate, and put them into the stirrer and stir for 3 min. Finally, add 3 g of hydrophobic nano-silica and 2 g of hydrophilic nano-silica, place them in an ultrasonic machine and ultrasonicate for 30 min. Finally, add 50 g of D80 solvent oil to obtain the nano-silicon coating liquid.

[0116] 3. Preparation of the hook:

[0117] Same as Example 1.

[0118] After assembling the slider and conducting the paint spraying test, after 10 times of zipping on the zipper, the paint on the tip of the hook all peeled off, meeting the process requirements.

[0119] Example 4

[0120]

[0121]

[0122] 2. Preparation process:

[0123] Same as Example 1

[0124] 3. Preparation of the hook:

[0125] Same as Example 1.

[0126] After assembling the slider and conducting the spray paint test, after 8 times of zipping on the zipper, the paint on the tip of the hook all peeled off, meeting the process requirements.

[0127] Comparative Example 1

[0128] Preparation of the hook:

[0129] Step 1, degreasing and dust removal of the hook: Immerse the hook in an ultrasonic cleaner filled with degreasing agent, and conduct surface degreasing through ultrasonic cleaning. (25°C, cleaning for 5 minutes)

[0130] Step 2, drying: Put the hook into a spin dryer to thoroughly dry the surface moisture. (Spin drying time: 8 minutes, drying tunnel temperature: 110°C, time: 60 minutes)

[0131] Then, after assembling the slider and conducting the spray paint test, observe the coating change on the surface of the hook after reciprocating zipping 100 times after threading the slider. See Figure 6 , Figure 6 is a photo of the hook prepared in Comparative Example 1 before threading the slider. As can be seen from Figure 6 , there is relatively thick paint on the surface of the hook after spray painting. See Figure 7 , Figure 7 is a photo of the hook prepared in Comparative Example 1 after threading the slider. As can be seen from Figure 7 , there is still relatively thick paint on the surface of the conventional hook after reciprocating zipping 100 times.

[0132] Conduct a cross-cut test on conventional tinplate, and the adhesion grade is 3B. See Figure 8 , Figure 8 is a photo of conventional paint sprayed on the surface of tinplate.

[0133] Comparative Example 2

[0134] 1. Paint formula

[0135]

[0136]

[0137] 2. Preparation Method

[0138] First, add 15 g of polydimethylsiloxane and 18 g of n - hexane to a stirrer and stir for 2 min. Then add 2 g of tetraethoxysilane and 3 g of dilaurate, and put them into the stirrer again and stir for 3 min. Add 2 g of hydrophilic nano - silica, place it in an ultrasonic machine and ultrasonicate for 30 min. Finally, add 50 g of 120# solvent oil to obtain the nano - silicon coating liquid.

[0139] 3. Preparation of the hook:

[0140] After assembling the slider and conducting the painting test, after 100 times of zipping on the zipper, the paint on the tip of the hook peeled off, failing to achieve the expected effect.

[0141] Test Example

[0142] Perform reciprocating zipping on the hook after threading the slider, and observe the changes in the surface coating of the hook. The results are shown in Table 1.

[0143] The test results are shown in Table 1.

[0144] Table 1 Performance Test Results of the Hook

[0145]

[0146] The above - mentioned is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A horse hook, characterized in that, Including: A hook blank and a nano-silicon coating compounded on the surface of the hook blank. By mass percentage, the raw materials for preparing the nano-silicon coating include: Install the hook onto the slider and spray paint the whole slider. Install the slider onto the zipper. During the process of pulling the slider, at least part of the paint on the contact part between the hook and the teeth is scraped off by the zipper teeth.

2. The hook according to claim 1, characterized in that, The particle size of the hydrophobic modified nano-silica is 5 - 40 nm.

3. The horse hook according to claim 1, characterized in that, The particle size of the hydrophilic modified nano-silica is 5 - 30 nm.

4. The magou according to claim 1, wherein The surfactant is selected from one or more of glycerol monolaurate, isopropyl myristate, butyl palmitate, and dilaurate; The cross-linking agent is selected from tetramethoxysilane and / or tetraethoxysilane.

5. The horse hook according to claim 1, characterized in that, The solvent is selected from one or more of n-hexane, cyclohexane, and No. 6 solvent naphtha; The solvent naphtha is selected from one or more of 120# solvent naphtha, D80 solvent naphtha, and D40 solvent naphtha.

6. The magou according to claim 1, characterized in that, The thickness of the nano-silicon coating is 3 - 20 μm.

7. A preparation method of a horse hook according to any one of claims 1 to 6, characterized in that, Including the following steps: A) Treat the hook blank to obtain a treated hook. B) Spray the nano-silicon coating liquid on the surface of the treated hook and then dry it to form a nano-silicon coating on the surface of the hook blank. C) Repeat step B) to obtain the hook.

8. The preparation method according to claim 7, characterized in that, Step A) includes: A1) Immerse the hook blank in an ultrasonic cleaner filled with degreaser and perform surface degreasing through ultrasonic cleaning. A2) Remove the degreaser on the surface of the hook blank to obtain a treated hook.

9. The preparation method according to claim 7, wherein The preparation method of the sprayed nano-silicon coating liquid includes the following steps: Mix polydimethylsiloxane with the solvent and stir, then add tetraethoxysilane and the surfactant, stir again, then add hydrophobic nano-silica and hydrophilic nano-silica for mixing, and finally add solvent naphtha to obtain the nano-silicon coating liquid.

10. The preparation method according to claim 7, characterized in that, The drying temperature is 140 - 200 °C, and the drying time is 20 - 40 minutes; The number of repetitions is 2 - 5 times.

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