A rubber ring and a method for manufacturing the same

Abstract

The application belongs to the field of drafting rubber apron for spinning, and specifically provides a rubber apron and a preparation method thereof. The rubber apron is characterized in that an inner rubber layer, a reinforcing layer and an outer rubber layer are sequentially compounded from inside to outside. The outer rubber layer is prepared by mixing and treating raw materials including the following components in parts by weight: rubber 90-100 parts, phenolic resin 10-20 parts, anti-aging agent 2-3 parts, accelerator 2-3 parts, sulfur 5-8 parts, zinc oxide 2-3 parts, stearic acid 0.5-2 parts, talc 3-5 parts, modified copolymer 2-5 parts, and lignin sulfonate 3-5 parts. The modified copolymer is a copolymer of sulfobetaine methacrylate and glycidyl methacrylate. The rubber apron prepared by the application has good drafting and spinning stability and can reduce the problem of sticking.

Description

Technical Field

[0001] This application belongs to the technical field of drafting rubber rings for spinning, and in particular relates to a rubber ring and its preparation method. Background Technology

[0002] The spinning traveler is a key component in the spinning drafting device, usually used in conjunction with the travel roller, and is divided into an upper traveler and a lower traveler. The outer surface of the upper traveler is in direct contact with the fiber bundle, and its main functions are "smoothing" and "combing," that is, controlling fiber movement through appropriate friction to ensure uniform arrangement and twisting into yarn. Travelers are typically multi-layered composite structures, including an inner traveler layer, a reinforcing layer, and an outer traveler layer.

[0003] Since the outer rubber layer is in direct contact with the yarn, on the one hand, the rubber ring generates serious static electricity accumulation when it rubs against the synthetic fibers at high speed, which leads to fiber entanglement around the rubber ring, yarn breakage, and an increase in yarn knots; on the other hand, the outer surface of the rubber ring is prone to adhering to short fiber fibers, cotton wax, or chemical fiber oils during long-term operation, forming "sticky spots", which damages the uniformity and friction characteristics of its surface and affects the spinning quality and continuity.

[0004] Currently, the industry mainly addresses the aforementioned static electricity accumulation problem by introducing exogenous small-molecule antistatic agents or by applying antistatic coatings to reduce static electricity accumulation during the use of rubber rings. However, small-molecule antistatic agents have migration issues, and antistatic coatings can wear down due to fiber friction, resulting in inconsistent antistatic effects. This leads to unstable quality of the spun yarn and the problem of fiber adhesion to the rubber ring has not been substantially solved. Therefore, it is necessary to develop a rubber ring and its preparation method that can suppress static electricity accumulation, reduce the adhesion between the rubber ring and the fiber, and not affect the performance of the rubber ring. Summary of the Invention

[0005] To address the aforementioned issues and further improve the spinning stability of the outer rubber layer while reducing the sticking spot problem of the rubber ring, this application provides a rubber ring and its preparation method.

[0006] This application first provides a rubber ring comprising an inner rubber layer, a reinforcing layer, and an outer rubber layer, which are sequentially compounded from the inside out. The outer rubber layer is prepared by mixing the following raw materials in parts by weight: 90-100 parts rubber, 10-20 parts phenolic resin, 2-3 parts anti-aging agent, 2-3 parts accelerator, 5-8 parts sulfur, 2-3 parts zinc oxide, 0.5-2 parts stearic acid, 3-5 parts talc, 2-5 parts modified copolymer, and 3-5 parts lignin sulfonate.

[0007] The modified copolymer is a copolymer of sulfobetaine methacrylate and glycidyl methacrylate.

[0008] Furthermore, the lignin sulfonate is calcium lignin sulfonate or sodium lignin sulfonate;

[0009] Furthermore, the preparation steps of the modified copolymer include the following:

[0010] Sulfobetaine methacrylate and glycidyl methacrylate were mixed and dispersed in a mixed solvent. After nitrogen was purged to remove oxygen, the reaction was initiated. After the reaction was completed, the product was precipitated in excess ethanol, then washed and dried to obtain the final product.

[0011] The mass ratio of sulfobetaine methacrylate to glycidyl methacrylate is (3.2-3.7):(0.25-0.38);

[0012] The mixed solvent is obtained by mixing methanol and acetonitrile in a volume ratio of (0.5-1):1;

[0013] The initiation reaction uses azobisisobutyronitrile as the initiator, and the amount of the initiator is 0.9%-1.1% of the total mass of the reactants.

[0014] The initiation reaction temperature is 65-72℃, and the reaction time is 5-6 hours.

[0015] By adopting the above technical solution, the copolymer obtained after the reaction has both sufficient zwitterionic units of sulfobetaine methacrylate to provide functionality and an appropriate amount of reactive epoxy groups to achieve stable anchoring of the modified copolymer to the rubber resin matrix. The highly polar sulfobetaine structural units in the modified copolymer are incompatible with the rubber matrix and migrate to the rubber surface under the thermal drive of the mixing and vulcanization process. The epoxy functional groups on its molecular chain react chemically with the active groups such as hydroxyl groups of phenolic resin, ultimately achieving selective segregation and permanent fixation of the modified copolymer on the surface of the rubber system, resulting in a stable functional thin layer.

[0016] The rubber is nitrile rubber;

[0017] And / or, the anti-aging agent is a quinoline-based anti-aging agent;

[0018] And / or, the accelerator is a thiuram-based accelerator;

[0019] The reinforcing layer is formed by winding fibrous materials, including polyester-cotton yarn;

[0020] This application also provides a method for preparing a rubber ring, the preparation steps of which include the following:

[0021] After the outer rubber layer is combined with the reinforcing layer and the inner rubber layer, it is vulcanized at 150-160℃ and 15-18MPa, and then cut and trimmed to obtain the final product.

[0022] Compared with the prior art, this application has the following beneficial effects:

[0023] 1. In this application, the modified copolymer segregates to the rubber surface during rubber compounding and vulcanization, ultimately forming a thin and stable functionalized surface layer rich in zwitterionic segments. This forms a physical isolation layer between the rubber ring and contaminants, improving the anti-adhesion performance of the rubber ring. At the same time, through the ionopolymer properties of the functionalized surface layer, ion transport channels that are firmly bonded by chemical action are constructed on the surface of the rubber ring, which can enable the outer rubber layer surface to obtain a long-lasting antistatic effect and promote the stability of the spinning process.

[0024] 2. When the added lignin sulfonate is combined with the modified copolymer, the phenolic hydroxyl groups of the lignin sulfonate structure couple with the modified copolymer during the rubber vulcanization process. Its chain structure can enhance the compatibility of the modified copolymer in the matrix and inhibit the aggregation of the modified copolymer. Detailed Implementation

[0025] To make the inventive objectives, technical solutions, and beneficial effects of this application clearer, the following detailed description is provided in conjunction with embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments described herein. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0027] When using “including,” “having,” and “contains” as described herein, the intention is to cover non-exclusive inclusion, unless an explicit qualifying term such as “only,” “consisting of,” etc., is used, in which case another component may be added.

[0028] The terms "preferred," "more preferably," "better," and "even better" used in this application refer to embodiments of this application that provide certain beneficial effects under certain circumstances. However, other embodiments may also be preferred under the same or other circumstances. Furthermore, the description of one or more preferred embodiments does not imply that other embodiments are unavailable, nor is it intended to exclude other embodiments from the scope of this application. That is, in this application, "preferred," "more preferably," "better," and "even better" are merely descriptions of implementations or embodiments with better effects, but do not constitute a limitation on the scope of protection of this application.

[0029] In this application, terms such as "further," "even more," and "particularly" are used for descriptive purposes and indicate differences in content, but should not be construed as limiting the scope of protection of this application.

[0030] In this application, "at least one" means one or more, such as one, two, or more. "Multiple" or "several" means at least two, such as two, three, etc., and "multi-layered" means at least two layers, such as two layers, three layers, etc., unless otherwise explicitly specified. In the description of this application, "several" means at least one, such as one, two, etc., unless otherwise explicitly specified.

[0031] When a numerical range is disclosed herein, the range is considered continuous and includes the minimum and maximum values ​​of the range, as well as every value between the minimum and maximum values. Furthermore, when the range refers to integers, it includes every integer between the minimum and maximum values ​​of the range. Additionally, when multiple ranges are provided to describe a feature or characteristic, the ranges may be combined. In other words, unless otherwise specified, all ranges disclosed herein should be understood to include any and all subranges to which they are incorporated.

[0032] Unless otherwise specified, all steps in this application may be performed sequentially or randomly. For example, the method comprising steps (a) and (b) indicates that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc. Unless otherwise stated, singular terms may include plural forms and should not be construed as having a quantity of one.

[0033] In this application, "above" or "below" includes the number itself. For example, "below 1" includes 1.

[0034] In this application, room temperature refers to 0~40℃, including but not limited to 10~40℃, or further to 20~30℃.

[0035] The present application will be further illustrated by the following examples, but these examples do not limit the scope of the present application.

[0036] When numerical ranges are given in the embodiments, it should be understood that, unless otherwise stated in this application, both endpoints of each numerical range and any value between the two endpoints may be selected. Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. All reagents or instruments whose manufacturers are not specified are conventional products that can be purchased commercially. In addition to the specific methods, equipment, and materials used in the embodiments, based on the knowledge of the prior art possessed by one of ordinary skill in the art and the description in this application, any prior art methods, equipment, and materials similar to or equivalent to those described, used, or made by the methods, equipment, and materials in the embodiments of this application may be used to implement this application.

[0037] The main raw material information for the embodiments and comparative examples of this application is as follows:

[0038] Sulfobetaine methacrylate, supplied by Guangdong Baike Reagent Co., Ltd.

[0039] Glycidyl methacrylate, supplied by Guangdong Fangxin Biotechnology Co., Ltd.

[0040] Nitrile rubber (model: NBR3305E), supplied by Lanzhou Petrochemical Branch of China National Petroleum Corporation;

[0041] Nitrile rubber (model: XNBR3304), supplied by Lanzhou Petrochemical Branch of China National Petroleum Corporation;

[0042] Talc powder (10 microns fineness), supplied by Guilin Guiguang Talc Development Co., Ltd.

[0043] Phenolic resin (model: BQ-2), supplied by Shanxi Chemical Research Institute Co., Ltd.

[0044] Calcium lignosulfonate, supplied by Shaoguan Xinrunhe Biotechnology Co., Ltd.

[0045] Sodium lignosulfonate, supplied by Jinan Guangkun Biotechnology Co., Ltd.

[0046] TMQ antioxidant, supplied by Nanjing Chemical Industry Co., Ltd., China Petrochemical Corporation;

[0047] TMTM accelerator, supplied by Weilin New Material Technology Co., Ltd.

[0048] In Examples 1-3 and Comparative Examples 1-2 of this application, the preparation steps of the inner adhesive layer are as follows:

[0049] Inner rubber layer: Set the initial temperature of the mixing chamber to 70℃ and the rotor speed to 45r / min. Add 95 parts of nitrile rubber and plasticize for 2 minutes. Then add 3 parts of talc powder and 1 part of stearic acid and mix for 3 minutes to raise the temperature to 105℃. Then add 3 parts of TMQ antioxidant and continue mixing for 3 minutes until the temperature reaches 118℃. Then add 40 parts of phenolic resin and mix for 5 minutes, controlling the temperature at 130℃. When the power curve is stable and the temperature reaches 135℃, immediately discharge the rubber. Transfer the discharged masterbatch to a two-roll mill with the roller temperature set to 40℃. After passing through the mill 3 times, add 2 parts of zinc oxide and 2.5 parts of accelerator TMTM in sequence. Cut the mill 3 times on each side and make triangular wrapping 5 times to ensure uniform dispersion. Then quickly add 5 parts of sulfur. After mixing with the mill cutter, pass the rubber through the mill 5 times and finally discharge to obtain the inner rubber layer.

[0050] Preparation Example 1

[0051] 3.2 g (11.5 mmol) of sulfobetaine methacrylate monomer and 0.25 g (1.8 mmol) of glycidyl methacrylate monomer were added to 20 mL of a mixed solvent of methanol and acetonitrile in a volume ratio of 0.5:1. The stirring speed was adjusted to 100 r / min, and high-purity nitrogen was purged for 5 min. Then, 0.9% of the initiator azobisisobutyronitrile (AIBN) was added to the solution. The stirring speed was maintained, and the reaction was carried out in an oil bath at 65 °C for 5 h. Subsequently, 100 mL of anhydrous ethanol was added to precipitate the polymer. The mixture was stirred for 10 min to allow the polymer to fully precipitate. After standing for 30 min, the mixture was filtered, and the precipitate was washed twice with water and dried to obtain the modified copolymer.

[0052] Preparation Example 2

[0053] 3.5 g (12.5 mmol) of sulfobetaine methacrylate monomer and 0.3 g (2.1 mmol) of glycidyl methacrylate monomer were added to 20 mL of a mixed solvent of methanol and acetonitrile in a volume ratio of 0.8:1. The stirring speed was adjusted to 150 r / min, and high-purity nitrogen was purged for 10 min. Then, 1% of the total monomer mass of initiator azobisisobutyronitrile was added to the solution. The stirring speed was maintained, and the reaction was carried out in an oil bath at 70 °C for 5.3 h. Subsequently, 100 mL of anhydrous ethanol was added to precipitate the polymer. The mixture was stirred for 10 min to allow the polymer to fully precipitate. After standing for 30 min, the mixture was filtered, and the precipitate was washed three times with water and dried to obtain the modified copolymer.

[0054] Preparation Example 3

[0055] 3.7 g (13.2 mmol) of sulfobetaine methacrylate monomer and 0.38 g (2.6 mmol) of glycidyl methacrylate monomer were added to 25 mL of a mixed solvent of methanol and acetonitrile in a volume ratio of 1:1. The stirring speed was adjusted to 200 r / min, and high-purity nitrogen was purged for 10 min. Then, 1.1% of the initiator azobisisobutyronitrile (AIBN) was added to the solution. The stirring speed was maintained, and the reaction was carried out in an oil bath at 72 °C for 6 h. Subsequently, 100 mL of anhydrous ethanol was added to precipitate the polymer. The mixture was stirred for 10 min to allow the polymer to fully precipitate. After standing for 30 min, the mixture was filtered, and the precipitate was washed three times with water and dried to obtain the modified copolymer.

[0056] Example 1

[0057] Outer rubber layer: Set the initial temperature of the mixing chamber to 70℃ and the rotor speed to 45r / min. Add 90 parts of nitrile rubber (model: XNBR3304) and masticate for 2 minutes. Then add 3 parts of talc powder and 0.5 parts of stearic acid, mix for 3 minutes, and raise the temperature to 105℃. Then add 2 parts of TMQ antioxidant and continue mixing for 2 minutes, raising the temperature to 115℃. Then add 10 parts of phenolic resin, 2 parts of pre-weighed modified copolymer (prepared in Preparation Example 1), and 3 parts of calcium lignosulfonate, mix for 4 minutes, and control the temperature at 125℃. When the power curve is stable and the temperature reaches 138℃, immediately discharge the rubber and transfer the discharged masterbatch to the open mill. Set the roller temperature to 40℃, and then add 2 parts of zinc oxide and 2 parts of TMTM accelerator. Cut the rubber 3 times on each side and make triangular wraps 5 times to ensure uniform dispersion. Then quickly add 5 parts of sulfur, mix with the cutter, and immediately pass the rubber through the mill 5 times. Then discharge the rubber to obtain the outer rubber layer.

[0058] The specific steps for preparing the upper rubber ring in this application are as follows:

[0059] The inner rubber layer is attached to the mold surface, and polyester-cotton reinforcing yarn is wound around to form a reinforcing layer. Then, the outer rubber layer is laminated onto the reinforcing layer, ensuring that each layer is tightly bonded without air bubbles. The assembled blank is placed in a vulcanizing machine and vulcanized under process conditions of 150℃ and 15MPa, so that the inner and outer rubber layers and the reinforcing layer crosslink and solidify into one. After vulcanization, the upper rubber ring is obtained after demolding, cutting to a fixed length and surface finishing.

[0060] In this embodiment, the yarn is spun using the top rubber ring:

[0061] Rubber roller: LXC-63 No-treatment rubber roller; Lower rubber ring: LXA-2010

[0062] Product: Compact Siro-spun LF Tencel (5.6tex) Spinning Frame: FA-506

[0063] Spinning data are shown in Table 1.

[0064] Table 1. Spinning data using the rubber ring combination in Example 1

[0065]

[0066] Example 2

[0067] Outer rubber layer: Set the initial temperature of the mixing chamber to 70℃ and the rotor speed to 45r / min. Add 98 parts of nitrile rubber (model: XNBR3304) and masticate for 2 minutes. Then add 5 parts of talc and 1 part of stearic acid, mix for 3 minutes, and raise the temperature to 110℃. Then add 2 parts of TMQ antioxidant and continue mixing for 2 minutes, raising the temperature to 120℃. Then add 15 parts of phenolic resin, 4 parts of pre-weighed modified copolymer (prepared in Preparation Example 2), and 3 parts of calcium lignosulfonate, mix for 5 minutes, and control the temperature at 130℃. When the power curve is stable and the temperature reaches 138℃, immediately discharge the rubber and transfer the discharged masterbatch to the open mill. Set the roller temperature to 45℃, and then add 2 parts of zinc oxide and 3 parts of TMTM accelerator. Cut the rubber 3 times on each side and make triangular wraps 5 times to ensure uniform dispersion. Then quickly add 6 parts of sulfur, mix with the cutter, and immediately pass the rubber through the mill 5 times. Then discharge the rubber to obtain the outer rubber layer.

[0068] The specific steps for preparing the upper rubber ring in this application are as follows:

[0069] The inner rubber layer is attached to the mold surface, and polyester-cotton reinforcing yarn is wound around to form a reinforcing layer. Then, the outer rubber layer is laminated onto the reinforcing layer, ensuring that each layer is tightly bonded without air bubbles. The assembled blank is placed in a vulcanizing machine and vulcanized under process conditions of 155℃ and 18MPa, so that the inner and outer rubber layers and the reinforcing layer crosslink and solidify into one. After vulcanization, the upper rubber ring is obtained after demolding, cutting to a fixed length and surface finishing.

[0070] In this embodiment, the yarn is spun using the top rubber ring:

[0071] Rubber roller: LXC-63 No-treatment rubber roller; Lower rubber ring: LXA-2010

[0072] Product: Compact Siro-spun LF Tencel (5.6tex) Spinning Frame: FA-506

[0073] Spinning data are shown in Table 2.

[0074] Table 2. Spinning data using the rubber ring combination in Example 2.

[0075]

[0076] Example 3

[0077] Outer rubber layer: Set the initial temperature of the mixing chamber to 70℃ and the rotor speed to 45r / min. Add 100 parts of nitrile rubber (model: NBR3305E) and masticate for 2 minutes. Then add 5 parts of talc and 2 parts of stearic acid, mix for 3 minutes, and raise the temperature to 110℃. Then add 3 parts of TMQ antioxidant and continue mixing for 2 minutes, raising the temperature to 120℃. Then add 20 parts of phenolic resin, 5 parts of pre-weighed modified copolymer (prepared in Preparation Example 3), and 5 parts of sodium lignosulfonate, mix for 5 minutes, and control the temperature at 130℃. When the power curve is stable and the temperature reaches 140℃, immediately discharge the rubber and transfer the discharged masterbatch to the open mill. Set the roller temperature to 45℃, and then add 3 parts of zinc oxide and 3 parts of TMTM accelerator. Cut the rubber 3 times on each side and make triangular wraps 5 times to ensure uniform dispersion. Then quickly add 8 parts of sulfur, mix with the cutter, and immediately pass the rubber through the mill 5 times. Then discharge the rubber to obtain the outer rubber layer.

[0078] The specific steps for preparing the upper rubber ring in this application are as follows:

[0079] The inner rubber layer is attached to the mold surface, and polyester-cotton reinforcing yarn is wound around to form a reinforcing layer. Then, the outer rubber layer is laminated onto the reinforcing layer, ensuring that each layer is tightly bonded without air bubbles. The assembled blank is placed in a vulcanizing machine and vulcanized under process conditions of 160℃ and 18MPa, so that the inner and outer rubber layers and the reinforcing layer crosslink and solidify into one. After vulcanization, the upper rubber ring is obtained after demolding, cutting to a fixed length and surface finishing.

[0080] In this embodiment, the yarn is spun using the top rubber ring:

[0081] Rubber roller: LXC-63 No-treatment rubber roller; Lower rubber ring: LXA-2010

[0082] Product: Compact Siro-spun LF Tencel (5.6tex) Spinning Frame: FA-506

[0083] Spinning data are shown in Table 3.

[0084] Table 3. Spinning data using the rubber ring combination in Example 3.

[0085] Comparative Example 1

[0086] The only difference between this comparative example and Example 1 is that an equal amount of antistatic agent was used instead of the modified copolymer to prepare the top ring.

[0087] The antistatic agent (model: SH-105) was supplied by Nantong Lanzhuo New Materials Co., Ltd.

[0088] The remaining steps are the same as in Example 1.

[0089] The yarn is spun using the upper rubber ring in this comparative example:

[0090] Rubber roller: LXC-63 No-treatment rubber roller; Lower rubber ring: LXA-2010

[0091] Product: Compact Siro-spun LF Tencel (5.6tex) Spinning Frame: FA-506

[0092] Spinning data are shown in Table 4.

[0093] Table 4. Spinning data using the rubber ring combination from Comparative Example 1.

[0094]

[0095] Comparative Example 2

[0096] The only difference between this comparative example and Example 1 is that calcium / sodium lignosulfonate is not added in the preparation step of the outer adhesive layer; all other steps are the same as in Example 1.

[0097] The yarn is spun using the upper rubber ring in this comparative example:

[0098] Rubber roller: LXC-63 No-treatment rubber roller; Lower rubber ring: LXA-2010

[0099] Product: Compact Siro-spun LF Tencel (5.6tex) Spinning Frame: FA-506

[0100] Spinning data are shown in Table 5.

[0101] Table 5. Spinning data using the rubber ring combination from Comparative Example 2.

[0102]

[0103] Performance testing

[0104] 1. Hardness test

[0105] The outer adhesive layers of Examples 1-3 and Comparative Examples 1-2 were subjected to hardness tests according to the test contents of the national standard GB / T531.1-2008. The results are shown in Table 6.

[0106] 2. Tensile strength and elongation at break tests

[0107] The outer adhesive layers of Examples 1-3 and Comparative Examples 1-2 were tested for tensile strength and elongation at break according to the test contents of the national standard GB / T528-2009. The results are shown in Table 6.

[0108] 3. Sticky Spot Test

[0109] The products of Examples 1-3 and Comparative Examples 1-2 were combined for spinning. The test period was 20 days. The outer rubber layer was observed to see if sticky spots were generated. The test results are shown in Table 6.

[0110] Table 6. Performance test results of the outer adhesive layer in Examples 1-3 and Comparative Examples 1-2

[0111] Based on Examples 1-3, Comparative Examples 1-2, and Tables 1-6, it can be concluded that the outer adhesive layer prepared using the embodiments of this application results in more stable yarn quality during the spinning process, reduces the adhesion problem of the rubber ring during spinning, and inhibits the formation of sticky spots. In contrast, the antistatic agent used in Comparative Example 1 has migration problems, and after 3 months of use, the uniformity of the spun yarn product changes significantly, resulting in a decrease in spinning quality. Furthermore, Comparative Example 2 lacks the compatibilizing component of the modified copolymer, which exacerbates the phase separation problem when the modified copolymer is added to the matrix, resulting in poor mechanical properties of the prepared outer adhesive layer and a significant decrease in spinning stability compared to the examples.

[0112] Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A rubber ring, characterized in that, The material comprises an inner rubber layer, a reinforcing layer, and an outer rubber layer, which are sequentially compounded from the inside out. The outer rubber layer is prepared by mixing the following raw materials in parts by weight: 90-100 parts rubber, 10-20 parts phenolic resin, 2-3 parts anti-aging agent, 2-3 parts accelerator, 5-8 parts sulfur, 2-3 parts zinc oxide, 0.5-2 parts stearic acid, 3-5 parts talc, 2-5 parts modified copolymer, and 3-5 parts lignin sulfonate. The modified copolymer is a copolymer of sulfobetaine methacrylate and glycidyl methacrylate, and the preparation steps include the following: Sulfobetaine methacrylate and glycidyl methacrylate were mixed and dispersed in a mixed solvent. After nitrogen was purged to remove oxygen, the reaction was initiated. After the reaction was completed, the product was precipitated in excess ethanol, then washed and dried to obtain the final product. The lignin sulfonate is calcium lignin sulfonate or sodium lignin sulfonate; The rubber is nitrile rubber; And / or, the anti-aging agent is a quinoline-based anti-aging agent; And / or, the accelerator is a thiuram-based accelerator.

2. The rubber ring according to claim 1, characterized in that, The mass ratio of sulfobetaine methacrylate to glycidyl methacrylate is (3.2-3.7):(0.25-0.38).

3. The rubber ring according to claim 1, characterized in that, The mixed solvent is obtained by mixing methanol and acetonitrile in a volume ratio of (0.5-1):

1.

4. The rubber ring according to claim 1, characterized in that, The initiation reaction is initiated by azobisisobutyronitrile (AIBN), and the amount of AIBN is 0.9%-1.1% of the total mass of the reactants.

5. The rubber ring according to claim 1, characterized in that, The initiation reaction temperature is 65-72℃, and the reaction time is 5-6 hours.

6. The rubber ring according to claim 1, characterized in that, The reinforcing layer is formed by winding fibrous materials, including polyester-cotton yarn.

7. A method for preparing a rubber ring according to any one of claims 1-6, characterized in that, The preparation steps include the following: After the outer rubber layer is combined with the reinforcing layer and the inner rubber layer, it is vulcanized at 150-160℃ and 15-18MPa, and then cut and trimmed to obtain the final product.

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