Walking belt for window cleaning robot and preparation method of walking belt

Abstract

The invention discloses a walking belt for a window cleaning robot, which is characterized by comprising the following components: 20-40 parts of natural rubber; 20-60 parts of solution polymerized styrene-butadiene rubber; 20 to 60 parts of nitrile rubber; 30 to 60 parts of a reinforcing agent; 2-10 parts of a coupling agent; 3 to 10 parts of a homogenizing agent; 5 to 20 parts of wet skid resistant resin; 3-10 parts of an active agent; 1-4 parts of an anti-aging agent; 1-5 parts of an accelerant; and 0.5-3 parts of a vulcanizing agent. The invention also discloses a preparation method of the composition. According to the walking belt for the window cleaning robot, stable walking belt performance is provided, and meanwhile the situation that when a walking belt product in the prior art makes contact with the surface of glass, walking marks caused by movement of the walking belt are likely to be generated, and the cleanliness of the glass is affected is avoided.

Description

Technical Field

[0001] The invention relates to the field of walking belt manufacturing, and in particular to a walking belt for a window cleaning robot and a preparation method thereof. Background Art

[0002] The window cleaning robot uses a walking belt to move smoothly on the window and keep it clean. The walking belt can ensure that the window cleaning robot moves accurately on the window surface without slipping or position deviation.

[0003] The walking belt connects the motor and the cleaning module of the window cleaning robot, and effectively transmits the power of the motor to the cleaning module.

[0004] The walking belt helps the robot maintain a stable motion trajectory, maintaining cleaning efficiency even on the irregular surface of the window.

[0005] The walking belt of the window cleaning robot is usually made of wear-resistant materials to withstand long-term use and friction on the window surface.

[0006] The walking belt of the window cleaning robot usually consists of three parts (see Figure 1 ), rubber body, skeleton material cord and covering layer. The rubber body is generally polyurethane, silicone, natural rubber, solution-polymerized styrene-butadiene rubber, nitrile rubber, etc., the skeleton material is generally glass fiber, polyester or aramid cord, and the covering layer is generally made of nylon.

[0007] However, during the friction process, existing walking belt products such as the walking belt products shown in Chinese patent CN2020114174841 are prone to produce faint walking marks caused by residual glue caused by the movement of the walking belt when in contact with the glass surface, affecting the cleanliness and cleaning effect of the glass. Fig.11 shown.

[0008] The traces left by the running belt on the glass are related to the cleanliness of the running belt surface. There are many factors that affect the cleanliness, but the main reason is that some substances in the running belt rubber formula exceed the solubility saturation and are easy to precipitate. In addition, wax, oil, and low molecular substances are in a free state and continue to migrate to the surface of the material, causing the cleanliness of the running belt to deteriorate.

[0009] Some people use polyurethane walking belts or silicone walking belts to overcome the problem of walking marks. However, the production process of polyurethane walking belts is relatively complicated, requiring multiple reactions, mixing, filling and other processes, which increases the process cost and causes the hardness to change dramatically with the change of use temperature.

[0010] In addition, polyurethane walking belts have poor water resistance and are prone to hydrolysis, stickiness and aging. Walking belts made of silicone have poor wear resistance and tear resistance and are more expensive.

[0011] The raw material and process costs of the walking belt for the window-cleaning robot of the present invention are relatively low, being about one-half of that of a polyurethane walking belt and about one-third of that of a silicone walking belt. Summary of the invention

[0012] In order to overcome the above-mentioned defects of the prior art, an object of the present invention is to provide a walking belt for a window cleaning robot and a preparation method thereof.

[0013] The walking belt for the window cleaning robot of the present invention not only provides low-cost and stable walking belt performance, but also avoids the walking belt products in the prior art that are prone to leaving walking marks due to the movement of the walking belt when in contact with the glass surface, thereby affecting the cleanliness and cleaning effect of the glass.

[0014] A walking belt for a window cleaning robot, comprising:

[0015] Natural rubber 20-40 parts;

[0016] 20-60 parts of solution polymerized styrene-butadiene rubber;

[0017] 20-60 parts of nitrile rubber;

[0018] 30-60 parts of reinforcing agent;

[0019] 2-10 parts of coupling agent;

[0020] 3-10 parts of homogenizer;

[0021] 5-20 parts of anti-slip resin;

[0022] 3-10 parts of active agent;

[0023] 1-4 parts of antioxidant;

[0024] 1-5 parts of accelerator;

[0025] Vulcanizing agent 0.5-3 parts.

[0026] In a preferred embodiment of the present invention, the mass ratio of the natural rubber, the solution polymerized styrene-butadiene rubber and the nitrile-butadiene rubber is 1:1:3-1:3:1.

[0027] In a preferred embodiment of the present invention, the reinforcing agent is silicon dioxide.

[0028] Any one or more of precipitated silica, fumed silica, and channel-process carbon black silica are preferred.

[0029] The application of silica as a reinforcing agent, due to its chemical stability, gives the rubber compound good tensile strength, tear strength, abrasion resistance and wet skid resistance.

[0030] In a preferred embodiment of the present invention, the coupling agent is Si-69 bis-[γ-(triethoxysilyl)propyl]tetrasulfide. The coupling agent is preferably 6-10 parts.

[0031] The present invention combines inorganic matter and organic matter by coupling agent, which can not only react with the surface of silicon dioxide to have better dispersibility, but also the coupling agent can participate in the vulcanization process of the rubber composition, thereby improving the tensile strength, tear resistance and wear resistance of the vulcanized rubber.

[0032] At the same time, the applicant unexpectedly discovered that after adding sulfur-containing silane coupling agent to the rubber, it reacts to form covalent chemical bonds during the vulcanization process, making it difficult for the molecular chains to slip relative to each other, deepening the crosslinking density, and reducing the phenomenon of low molecular free matter precipitating from the rubber.

[0033] In a preferred embodiment of the present invention, the homogenizer is RH-100. The homogenizer is used to improve the blending effect between different rubbers.

[0034] The natural rubber and solution-polymerized styrene-butadiene rubber in the formula of the present invention are non-polar rubbers, and the nitrile-butadiene rubber is a polar rubber. The solubility parameters and surface tension values ​​of the two types of rubbers are relatively large, thereby affecting the mutual solubility of the rubbers. The homogenizer makes it easy for polymer molecules of different polarities to move mutually, thereby achieving the purpose of uniform blending.

[0035] In a preferred embodiment of the present invention, the anti-slip resin CSR8060 is a modified terpene phenolic compound, preferably 10-20 parts of the anti-slip resin.

[0036] The use of anti-skid resin is based on its chemical cross-linking reaction and physical suction cup effect, which significantly enhances grip and wear resistance in wet conditions.

[0037] In a preferred embodiment of the present invention, the active agent is any one or more of active zinc oxide or stearic acid.

[0038] In a preferred embodiment of the present invention, the antioxidant is any one or more of MB (2-mercaptobenzoimidazole) or SP-C (styrenated phenol).

[0039] A mixture of the two is preferred, wherein the mass ratio of MB (2-mercaptobenzoimidazole) to SP-C (styrenated phenol) is 1-2:1-2.

[0040] In a preferred embodiment of the present invention, the accelerator is any one or more of M (2-mercaptobenzothiazole), DM (2,2'-dithiodibenzothiazole) or CZ (N-cyclohexyl-2-benzothiazolesulfenamide).

[0041] A mixture of the three is preferred, wherein the accelerator is a mixture of M (2-mercaptobenzothiazole), DM (2,2'-disulfide dibenzothiazole) and CZ (N-cyclohexyl-2-benzothiazole sulfenamide) in a mass ratio of 1-2:1:0.5-2.

[0042] In a preferred embodiment of the present invention, the vulcanizing agent is sulfur S-80 (α-type sulfur).

[0043] A method for preparing a walking belt for a window cleaning robot comprises the following steps:

[0044] The first step is to put the natural rubber, solution polymerized styrene butadiene rubber and nitrile rubber into an open mill for plastication, respectively, with the plastication roller temperature ≤80°C, the thin roller distance ≤1.5mm, the plastication time being 0.5-1 hour, and the plastication being stopped for 8 hours or more to obtain the plasticated natural rubber, solution polymerized styrene butadiene rubber and nitrile rubber;

[0045] The second step is to put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-6 minutes, finally add the vulcanizer, mix for 1-3 minutes, and then cool the mixture after mixing evenly, and leave it for use after 12 hours or more;

[0046] The third step is to place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and coat it with rubber to form a cylindrical parison. Then, it is vulcanized in a steam vulcanizer at a vulcanization temperature of 145-165°C, a vulcanization time of 30-60 minutes, an external pressure of 10-15MPa, and an internal pressure of 4-6MPa to obtain a semi-finished product.

[0047] Afterwards, the walking belt for the window cleaning robot is obtained by grinding, grooving and cutting.

[0048] The beneficial effects of the present invention are:

[0049] (1) The present application improves the anti-slip and wear-resistant properties of the rubber by blending natural rubber, solution-polymerized styrene-butadiene rubber and nitrile-butadiene rubber. After blending, the rubber can obtain a composition with good performance and low cost.

[0050] (2) The present application uses a reinforcing agent, silica, which is chemically stable and gives the rubber compound good tensile strength, tear strength, abrasion resistance and anti-slip properties.

[0051] (3) The present application uses a homogenizer to make it easier for polymer molecules of different polarities to move with each other, thereby achieving the purpose of blending and improving the overall performance.

[0052] (4) The present application uses an anti-slip resin, which significantly enhances the grip and wear resistance under wet conditions based on its chemical cross-linking reaction and physical suction cup effect.

[0053] (5) The present application uses a preferred coupling agent, which can not only react with the surface of silica to have better dispersibility, but also participate in the vulcanization process of the rubber composition, thereby improving the tensile strength, tear resistance and wear resistance of the vulcanized rubber. During the vulcanization process, the reaction forms a covalent chemical bond, which makes it difficult for the molecular chain to slip relative to each other, deepens the crosslinking density, and reduces the phenomenon of low molecular weight free matter precipitating from the rubber. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a schematic diagram of the structural assembly of a common walking belt for a window cleaning robot.

[0055] Figure 2 Schematic diagram of the test results of the walking trajectory deviation value of the walking belt of the window cleaning robot in Examples 1-8 of the present invention.

[0056] Figure 3-10 Schematic diagram of the walking mark test results of the walking belt of the window cleaning robot according to Examples 1-8 of the present invention.

[0057] Fig.11 This is a schematic diagram of the test results of the walking mark left by the walking belt of the window cleaning robot in the prior art. DETAILED DESCRIPTION

[0058] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below through the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the scope of the present invention. In addition, in the following structure, the description of the known structure and technology is omitted to avoid unnecessary confusion of the concept of the present invention.

[0059] In the following examples and comparative examples, the compound monomers and related reagents used can be purchased from the market, among which natural rubber was purchased from Shanghai Liankangming Chemical (Group) Co., Ltd.;

[0060] Solution-polymerized styrene-butadiene rubber was purchased from Sinopec Shanghai Gaoqiao Petrochemical Co., Ltd.;

[0061] Nitrile rubber was purchased from Japan Zeon Co., Ltd.

[0062] Homogenizer RH-100 was purchased from Lianyungang Ruiba Chemical Co., Ltd.;

[0063] The coupling agent Si-69 was purchased from Nanjing Pinning Coupling Agent Co., Ltd.

[0064] Anti-slip resin CSR8060 was purchased from Jiangsu Qixiang High-tech Materials Co., Ltd.;

[0065] Silica, carbon black, active zinc oxide, stearic acid, antioxidant MB, SP-C, accelerators M, DM, CZ, vulcanizing agent S-80 Ruiba Chemical Co., Ltd. and Shanghai Liankangming Chemical (Group) Co., Ltd.

[0066] The applicant discovered during the experiment that when waxes, softener oils, excessive antioxidants and vulcanizers were added to the rubber and the mixing was uneven, precipitates would appear on the surface of the product. The essential reason for this was that the amount of the above-mentioned compounding agents exceeded their solubility in the rubber, and the excess compounding agents would migrate from the inside of the rubber to the surface of the product to form a layer of oily substance.

[0067] In order to improve the problems in the prior art and formulation, embodiments of the present invention are as follows:

[0068] Example 1

[0069] A walking belt for a window-wiping robot comprises the following raw materials, measured by weight: 20 parts of natural rubber, 20 parts of solution-polymerized styrene-butadiene rubber, 60 parts of nitrile rubber, 0.2 parts of carbon black, 40 parts of silicon dioxide, 2 parts of coupling agent, 3.5 parts of homogenizer, 12 parts of anti-slip resin, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 1 part of accelerator M, 1.5 parts of accelerator DM, 0.8 parts of accelerator CZ and 2.2 parts of sulfur.

[0070] The method for preparing a walking belt for a window cleaning robot comprises the following steps:

[0071] (1) Weigh all raw materials by weight;

[0072] (2) placing natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber in an open mill for mastication respectively, with a mastication roller temperature of 80° C., a thin roller distance of 1.0 mm, a mastication time of 50 minutes, and standing for 8 hours to obtain masticated natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber;

[0073] (3) Put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-8 minutes, and finally add the vulcanizer, mix for 1-3 minutes until the mixture is evenly mixed, then cool it down and leave it for use after 12 hours.

[0074] (4) Place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and wrap it with rubber to form a cylindrical parison. Then vulcanize it in a steam vulcanizer at a vulcanization temperature of 160°C, a vulcanization time of 30 minutes, an external pressure of 14 MPa, and an internal pressure of 5.5 MPa to obtain a semi-finished product. Then grind it to the required size with a grinder, and then evenly open drainage grooves on the working surface of the walking belt, and cut it to a specified width to obtain the walking belt used by the window cleaning robot.

[0075] Example 2

[0076] A walking belt for a window cleaning robot has a substantially similar formulation to that of Example 1, except that the anti-slip resin is changed from 12 parts to 16 parts, and the coupling agent is changed from 2 parts to 6 parts.

[0077] The preparation method is the same as Example 1.

[0078] Example 3

[0079] A walking belt for a window-wiping robot comprises the following raw materials, measured by weight: 20 parts of natural rubber, 40 parts of solution-polymerized styrene-butadiene rubber, 40 parts of nitrile rubber, 0.2 parts of carbon black, 40 parts of silicon dioxide, 2 parts of coupling agent, 3.5 parts of homogenizer, 12 parts of anti-slip resin, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 1 part of accelerator M, 1.5 parts of accelerator DM, 0.8 parts of accelerator CZ and 2.2 parts of sulfur.

[0080] The method for preparing a walking belt for a window cleaning robot comprises the following steps:

[0081] (1) Weigh all raw materials by weight;

[0082] (2) placing natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber in an open mill for mastication respectively, with a mastication roll temperature of 70° C., a thin roller distance of 1.0 mm, a mastication time of 45 minutes, and standing for 8 hours to obtain masticated natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber;

[0083] (3) Put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-8 minutes, and finally add the vulcanizer, mix for 1-3 minutes until the mixture is evenly mixed, then cool it down and leave it for use after 12 hours.

[0084] (4) Place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and wrap it with rubber to form a cylindrical parison. Then vulcanize it in a steam vulcanizer at a vulcanization temperature of 155°C, a vulcanization time of 35 minutes, an external pressure of 13Mpa, and an internal pressure of 5MPa to obtain a semi-finished product. Then grind it to the required size with a grinder, and then evenly open drainage grooves on the working surface of the walking belt, and cut it to a specified width to obtain the walking belt used by the window cleaning robot.

[0085] Example 4

[0086] A walking belt for a window cleaning robot has a substantially similar formulation to that of Example 3, except that the anti-slip resin is changed from 12 parts to 16 parts, and the coupling agent is changed from 2 parts to 6 parts.

[0087] The preparation method is the same as Example 3.

[0088] Example 5

[0089] A walking belt for a window-wiping robot comprises the following raw materials, measured by weight: 20 parts of natural rubber, 60 parts of solution-polymerized styrene-butadiene rubber, 20 parts of nitrile rubber, 0.2 parts of carbon black, 40 parts of silicon dioxide, 2 parts of coupling agent, 3.5 parts of homogenizer, 12 parts of anti-slip resin, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 1 part of accelerator M, 1.5 parts of accelerator DM, 0.8 parts of accelerator CZ, and 2.2 parts of sulfur.

[0090] The method for preparing a walking belt for a window cleaning robot comprises the following steps:

[0091] (1) Weigh all raw materials by weight;

[0092] (2) placing natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber in an open mill for mastication respectively, with a mastication roll temperature of 70° C., a thin roller distance of 1.5 mm, a mastication time of 30 minutes, and standing for 8 hours to obtain masticated natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber;

[0093] (3) Put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-8 minutes, and finally add the vulcanizer, mix for 1-3 minutes until the mixture is evenly mixed, then cool it down and leave it for use after 12 hours.

[0094] (4) Place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and wrap it with rubber to form a cylindrical parison. Then vulcanize it in a steam vulcanizer at a vulcanization temperature of 150°C, a vulcanization time of 40 minutes, an external pressure of 12 MPa, and an internal pressure of 4.5 MPa to obtain a semi-finished product. Then grind it to the required size with a grinder, and then evenly open drainage grooves on the working surface of the walking belt, and cut it to a specified width to obtain the walking belt used by the window cleaning robot.

[0095] Example 6

[0096] A walking belt for a window cleaning robot has a formula that is substantially the same as that of Example 5, except that the anti-slip resin is changed from 12 parts to 16 parts, and the coupling agent is changed from 2 parts to 6 parts.

[0097] The preparation method is the same as Example 5.

[0098] Example 7

[0099] A walking belt for a window-wiping robot comprises the following raw materials, measured by weight: 40 parts of natural rubber, 40 parts of solution-polymerized styrene-butadiene rubber, 20 parts of nitrile rubber, 0.2 parts of carbon black, 40 parts of silicon dioxide, 2 parts of coupling agent, 3.5 parts of homogenizer, 12 parts of anti-slip resin, 5 parts of zinc oxide, 1 part of stearic acid, 1 part of antioxidant MB, 1 part of antioxidant SP-C, 1 part of accelerator M, 1.5 parts of accelerator DM, 0.8 parts of accelerator CZ and 2.2 parts of sulfur.

[0100] The method for preparing a walking belt for a window cleaning robot comprises the following steps:

[0101] (1) Weigh all raw materials by weight;

[0102] (2) placing natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber in an open mill for mastication respectively, with a mastication roller temperature of 60° C., a thin roller distance of 1.5 mm, a mastication time of 30 minutes, and standing for 8 hours to obtain masticated natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber;

[0103] (3) Put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-8 minutes, and finally add the vulcanizer, mix for 1-3 minutes until the mixture is evenly mixed, then cool it down and leave it for use after 12 hours.

[0104] (4) Place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and wrap it with rubber to form a cylindrical parison. Then vulcanize it in a steam vulcanizer at a vulcanization temperature of 150°C, a vulcanization time of 40 minutes, an external pressure of 12 MPa, and an internal pressure of 4.5 MPa to obtain a semi-finished product. Then grind it to the required size with a grinder, and then evenly open drainage grooves on the working surface of the walking belt, and cut it to a specified width to obtain the walking belt used by the window cleaning robot.

[0105] Example 8

[0106] A walking belt for a window cleaning robot has a substantially similar formulation to that of Example 7, except that the anti-slip resin is changed from 12 parts to 16 parts, and the coupling agent is changed from 2 parts to 6 parts.

[0107] The preparation method is the same as Example 7.

[0108] The preparation of the components of the above examples is summarized in Table 1.

[0109] Table 1

[0110]

[0111]

[0112] The present invention is further explained below in conjunction with performance tests.

[0113] Test items and test standards are shown in Table 2. Walking trajectory deviation test results are shown in Figure 2 , the walking trace test results are shown in Figure 3-10 .

[0114] Table 2

[0115]

[0116]

[0117] Test items and test results are shown in Table 3Table 3

[0118]

[0119]

[0120] Combination Figure 2 , Figure 3-10 From the data in Table 3, we can see that:

[0121] 1. The components in Examples 1-8 of the present invention have good physical and mechanical properties, and are resistant to ozone and UV aging.

[0122] 2. By comparing the components in Examples 1-6 of the present invention, it can be seen that when the natural rubber content remains unchanged at 20 parts, the solution-polymerized styrene-butadiene rubber content increases from 20 parts to 60 parts, and the nitrile rubber content decreases from 60 parts to 20 parts, the mechanical properties of the composition are improved, while the wear properties are reduced.

[0123] 3. From the comparison of the components in Examples 1-8 of the present invention, it can be seen that when the coupling agent is increased from 2 parts to 6 parts, the mechanical properties and wear properties of the composition are improved, and the walking mark condition is significantly improved. Only some areas of some embodiments have slight marks, and there are no obvious marks like in the comparative application. Among them, the mark conditions of Examples 2, 4, 6, and 8 are significantly improved compared with the comparative application.

[0124] 4. Comparison of the components in Examples 1-8 of the present invention shows that when the anti-slip resin CSR8060 is increased from 12 parts to 16 parts, the dry friction coefficient and wet friction coefficient of the composition are improved, and the sliding deviation of the walking track is significantly improved.

[0125] The above embodiments of the invention are only for illustrating the technical concept and features of the present invention, and their purpose is to allow people familiar with this technology to understand the content of the present invention and implement it. The present invention is not limited to the above embodiments. The above embodiments and descriptions are only for illustrating the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A walking belt for a window cleaning robot, characterized in that: include: 20-40 parts of natural rubber; 20-60 parts of solution polymerized styrene-butadiene rubber; 20-60 parts of nitrile rubber; 30-60 parts of reinforcing agent; 2-10 parts of coupling agent; 3-10 parts of homogenizer; 5-20 parts of anti-slip resin; 3-10 parts of active agent; 1-4 parts of antioxidant; 1-5 parts of accelerator; Vulcanizing agent 0.5-3 parts.

2. A walking belt for a window cleaning robot as claimed in claim 1, characterized in that: The mass ratio of the natural rubber, the solution-polymerized styrene-butadiene rubber and the nitrile-butadiene rubber is 1:1:3-1:3:

1.

3. The walking belt for a window cleaning robot according to claim 1, characterized in that: The reinforcing agent is silicon dioxide.

4. The walking belt for a window cleaning robot according to claim 1, characterized in that: The coupling agent is Si-69 bis-[γ-(triethoxysilyl)propyl] tetrasulfide.

5. The walking belt for a window cleaning robot according to claim 1, characterized in that: The homogenizer is RH-100.

6. The walking belt for a window cleaning robot according to claim 1, characterized in that: The anti-slip resin is a modified terpene phenolic compound.

7. The walking belt for a window cleaning robot according to claim 1, characterized in that: The active agent is any one or more of active zinc oxide or stearic acid.

8. The walking belt for a window cleaning robot according to claim 1, characterized in that: The antioxidant is any one or more of MB (2-mercaptobenzoimidazole) or SP-C (styrenated phenol); The accelerator is any one or more of M (2-mercaptobenzothiazole), DM (2,2'-disulfide dibenzothiazole) or CZ (N-cyclohexyl-2-benzothiazole sulfenamide).

9. The walking belt for a window cleaning robot according to claim 1, characterized in that: The vulcanizing agent is sulfur S-80 (α-type sulfur).

10. A method for preparing a walking belt for a window cleaning robot as claimed in any one of claims 1 to 9, characterized in that: The steps include: The first step is to put the natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber into an open mill for plastication, respectively, with the plastication roller temperature ≤80°C, the thin roller distance ≤1.0mm, the plastication time being 0.5-1 hour, and the plastication being stopped for 8 hours or more to obtain the plasticated natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber; The second step is to put the plasticized natural rubber, solution polymerized styrene-butadiene rubber and nitrile-butadiene rubber into an internal mixer and tumble for one minute to make the rubber mix soft, then add the weighed anti-slip resin, reinforcing agent, homogenizer, coupling agent, antioxidant, activator and accelerator in sequence, start the cooling system at a temperature of ≤100°C, mix for 4-8 minutes, and finally add the vulcanizer, mix for 1-3 minutes until the mixture is evenly mixed, then cool the material and leave it for use after 12 hours or more; The third step is to place the walking belt mold on the molding machine, wrap it with cloth, wind it with wire, and coat it with rubber to form a cylindrical parison. Then, it is vulcanized in a steam vulcanizer at a vulcanization temperature of 145-165°C, a vulcanization time of 30-60 minutes, an external pressure of 10-15MPa, and an internal pressure of 4-6MPa to obtain a semi-finished product. Afterwards, the walking belt for the window cleaning robot is obtained by grinding, grooving and cutting.

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