Wear-resistant rubber roller material and preparation method thereof

Abstract

The invention provides a wear-resistant rubber roller material and a preparation method thereof, a rubber layer of the rubber roller material adopts a multi-layer composite structure and comprises a rubber wear-resistant layer, an elastic buffer layer and a high-toughness bonding layer, the thickness of the rubber wear-resistant layer is 3-5mm, the thickness of the elastic buffer layer is 5-8mm, and the thickness of the high-toughness bonding layer is 1-2mm. The rubber roller is realized through multi-dimensional innovation of materials, structures and processes, the technical problems that a traditional rubber roller is insufficient in wear resistance, the performance is greatly influenced by temperature and the like are solved, production economy and use convenience are considered, and the rubber roller is suitable for efficient production requirements in various industrial fields.

Description

Technical Field

[0001] This invention relates to the field of rubber roller technology, specifically to a wear-resistant rubber roller material and its preparation method. Background Technology

[0002] Polypropylene rubber rollers, as key components in industrial production, are widely used in papermaking, dyeing, printing, metal processing, and other fields. Their wear resistance directly determines production efficiency, product quality, and equipment maintenance costs. Currently, traditional rubber rollers face multiple wear resistance bottlenecks during long-term service, mainly in the following aspects: From a materials perspective, most existing rubber rollers use a single rubber base material or a simple blend system, such as pure nitrile rubber, or binary blends of natural rubber and styrene-butadiene rubber. While these materials possess a certain degree of elasticity and basic wear resistance, under high load and high friction rate conditions, the rubber molecular chains are prone to slippage and breakage due to continuous shear force, causing the surface material to peel off rapidly in the form of abrasive debris. For example, rubber rollers used in cold rolling of steel plates often develop wear marks 1-2 mm deep within 500-800 hours due to the contact pressure and linear velocity difference with the metal plate, requiring machine shutdown and replacement. In terms of structural design, traditional rubber rollers mostly adopt a simple structure of "homogeneous rubber layer + metal core". The internal properties of the rubber layer are uniform, and it is impossible to adapt the performance according to the dynamic changes of the friction interface. When the surface of the rubber roller is affected by the embedding of abrasive particles, local stress concentration occurs, and cracks will rapidly propagate from the surface to the core, which will lead to local collapse or peeling of the rubber layer.

[0003] From the perspective of performance stability, the wear resistance of existing rubber rollers is significantly affected by temperature. In high-temperature conditions, such as the heat setting process in the dyeing and printing industry, at ambient temperatures of 80-120℃, the rubber matrix is ​​prone to thermo-oxidative aging, leading to a decrease in cross-linking density and a 30%-40% reduction in hardness, resulting in a sharp drop in wear resistance. Conversely, in low-temperature environments, the elastic modulus of rubber increases dramatically, increasing material brittleness and making it prone to surface cracking under impact loads. Limitations at the process level also restrict the improvement of wear resistance. Traditional vulcanization processes for rubber rollers often use a single temperature parameter, making it difficult to simultaneously ensure the uniformity of crosslinking of the rubber layer and the dispersion effect of the filler. For example, when the diameter of the rubber roller exceeds 300mm, the temperature difference between the core and the surface can reach 20-30℃, resulting in insufficient crosslinking in the core and excessive crosslinking in the surface, forming a non-uniform structure of "hard on the outside and soft on the inside." During rotation, uneven stress distribution exacerbates local wear. In addition, the surface treatment of rubber rollers mostly relies on mechanical grinding, with a roughness Ra value typically ranging from 0.8-1.6μm. The high surface unevenness becomes "anchor points" for abrasive particles, accelerating the wear process. To improve wear resistance, the prior art increases the amount of reinforcing fillers such as carbon black and white carbon black, and the mass fraction can reach 50-60%, to improve the hardness of rubber, but this will cause the elasticity of the material to decrease by 20-30%, which cannot meet the requirements of high pressure sensitivity. At the same time, the single high hardness design makes the rubber roller lack of buffer when facing foreign object impact, and is easy to produce instantaneous local overload and stress corrosion cracks. Therefore, how to break through the limitations of traditional material design and structure layout, and achieve long-term maintenance of wear resistance through multi-dimensional collaborative design while ensuring the basic elasticity of rubber, has become a technical problem to be solved in the field of rubber roller. SUMMARY

[0004] The technical problem to be solved is to provide a wear-resistant rubber roller, which prolongs the service life of the rubber roller and reduces the equipment maintenance cost in industrial production through unique structure design and material innovation.

[0005] Technical scheme: A wear-resistant rubber roller material, the rubber layer of the rubber roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer and a high-toughness adhesive layer, the thickness of the rubber wear-resistant layer is 3-5mm, the thickness of the elastic buffer layer is 5-8mm, and the thickness of the high-toughness adhesive layer is 1-2mm.

[0006] The preparation method of the wear-resistant rubber roller material, comprising the following steps: Step 1: pressing a rhombic convex array on the surface of the rubber wear-resistant layer compound, the convex array is distributed as one rhombic unit every 100-150μm, the spacing between adjacent units is 50-70μm, and the convex depth is 30-50μm; Step 2: winding the three layers of rubber layer compound on the sandblasted steel core in turn, the high-toughness adhesive layer is directly coated on the steel core, and then the elastic buffer layer and the rubber wear-resistant layer are coated in turn, and a step-by-step vulcanization process is adopted to obtain the wear-resistant rubber roller material.

[0007] Preferably, the step 2 step-by-step vulcanization process is first cured at 120℃ for 20min, then crosslinked at 150℃ for 30min, and finally shaped at 130℃ for 20min, and the pressure remains unchanged during the vulcanization process, and the pressure range is 6-10MPa.

[0008] Preferably, the rubber wear-resistant layer comprises the following components by weight: 60-70 parts of nitrile rubber, 25-30 parts of chlorinated polyethylene, 4-7 parts of BN modified aramid electrospun membrane, 6-10 parts of sheet-shaped graphene, and 2-2.5 parts of dicumyl peroxide; wherein the preparation method of the BN modified aramid electrospun membrane is: S1. Dissolve aramid in the DMAc ion solution of LiCl to obtain aramid spinning solution, and electrostatically spin the aramid spinning solution to obtain aramid electrostatic spinning film; S2. Crush the aramid fiber film into a sheet with an area less than 0.5 cm2, and place it under ultraviolet irradiation to obtain the aramid fiber film after irradiation; S3. Dip the aramid fiber film after irradiation modification into an ethanol solution containing KH550 silane coupling agent to obtain the aramid fiber film modified by the silane coupling agent; S4. Add the hydroxyl-modified BN to anhydrous ethanol, stir to disperse uniformly to obtain a BN-OH dispersion, load the BN-OH on the surface of the aramid fiber film prepared in step S4 by electrostatic spraying, and dry at a temperature of 60 DEG C to obtain the BN-modified aramid electrostatic spinning film.

[0009] Preferably, the concentration of the aramid spinning solution in S1 is 8-14 wt%; the voltage of electrostatic spinning is 15-20 kV, the flow rate is 0.3-0.6 mL / h, the collection distance is 15-17 cm, and the drum rotation speed is 100-1000 r / min.

[0010] Preferably, the distance of ultraviolet irradiation in S2 is 12-18 cm, and the time is 5-12 min.

[0011] Preferably, the preparation method of the hydroxyl-modified BN in S4 is as follows: add sodium nitrate and BN to nitric acid, the mass-volume ratio of sodium nitrate, BN and nitric acid is 1-2:1-2:80-100, heat to 180-200 DEG C, and react for 4-6 h to obtain the hydroxyl-modified BN; the parameters of electrostatic spraying are as follows: the flow rate is 1-1.5 mL / h, the distance is 12-15 cm, and the drum rotation speed is 100-1000 r / min.

[0012] Preferably, the elastic buffer layer comprises the following components in parts by weight: EVA resin 50-65 parts, natural rubber 35-42 parts, ultra-fine sodium bicarbonate 10-12 parts, zinc oxide 4-5 parts, sulfur 1-1.2 parts, and tetramethylthiuram disulfide 0.5-0.8 parts. The high-toughness adhesive layer comprises the following components in parts by weight: maleic anhydride grafted natural rubber 80-100 parts, SEBS-g-MAH (FG1901) 4-8 parts, sulfur 1.5-2.2 parts, accelerator CZ 1.2-1.5 parts, and silane coupling agent 2-3 parts.

[0013] Beneficial effects: The wear-resistant rubber roller material has the following advantages: The crystallinity of the wear-resistant layer is improved by blending chlorinated polyethylene and nitrile rubber in the application, the regular structure of the molecular chain of chlorinated polyethylene can induce the local ordered arrangement of the surrounding nitrile rubber molecular chain through interfacial interaction, so that the overall crystallinity of the blending system is improved, and the hardness and wear resistance of the material are enhanced by the crystalline phase of chlorinated polyethylene; In the application, the three-layer rubber is wound on the sand-blasted steel core in sequence to form a whole unvulcanized rubber roller, then a step-by-step synergistic vulcanization process is adopted, the inner layer is solidified at 120 DEG C first, then the temperature is raised to 150 DEG C for minutes to promote the crosslinking of the EVA resin and natural rubber blending system in the middle layer, and finally the temperature is lowered to 130 DEG C to complete the shaping of the outer layer, so that the vulcanization degree of each layer is accurately controlled through the temperature gradient, and the interlayer bonding strength is ensured. The application adopts a three-layer gradient structure design, the outer layer is a high-crystallinity rubber composite material, flaky graphene and boron nitride nanosheets are added, the cutting path of abrasive particles is prolonged through the 'flaky labyrinth effect', the thickness of the outer layer is designed to be 3-5mm, which can ensure enough material to resist long-term wear and will not increase the overall weight of the rubber roller due to excessive thickness, affecting the operation of the equipment; the middle layer is a temperature-responsive elastic matrix, EVA resin and natural rubber are used as the base material, and superfine sodium bicarbonate is mixed, the decomposition of the superfine sodium bicarbonate produces pores, providing good buffering and support for the middle layer; the inner layer is a high-toughness adhesive layer, maleic anhydride grafted natural rubber is used, and a gradient stress transmission interface is formed between the inner layer and the metal core through chemical bonding, the thickness of the inner layer is 1-2mm, which can ensure firm adhesion with the metal core and will not excessively increase the cost and weight of the rubber roller. DETAILED DESCRIPTION

[0014] The application will be further described below in combination with examples, and the following examples are used to explain the application, but the application is not limited to the following examples: Example 1

[0015] The preparation method of the BN modified aramid electrospun membrane is as follows: S1. Dissolve aramid in a DMAc ion solution of LiCl to obtain aramid spinning solution with a concentration of 8wt%, electrospin the aramid spinning solution, the voltage of electrospinning is 20kV, the flow rate is 0.6mL / h, the collection distance is 17cm, and the drum rotation speed is 100r / min, to obtain aramid electrospun membrane; S2. Crush the aramid fiber membrane into flaky pieces with an area of less than 0.5cm 2 , place it under ultraviolet irradiation, the distance of ultraviolet irradiation is 12cm, and the time is 5min, to obtain the irradiated aramid fiber membrane; S3. The irradiation-modified aramid fiber membrane is immersed in an ethanol solution containing KH550 silane coupling agent, the mass ratio of silane coupling agent to aramid fiber membrane is 1:5, to obtain a silane coupling agent-modified aramid fiber membrane; S4. The hydroxyl-modified BN is added to anhydrous ethanol, stirred and uniformly dispersed to obtain a BN-OH dispersion liquid, the BN-OH dispersion liquid is used to load the aramid fiber membrane prepared in step S4 by electrostatic spraying, and the BN-OH is dried at a temperature of 60°C to obtain a BN-modified aramid electrospun membrane; The preparation method of the hydroxyl-modified BN is as follows: sodium nitrate and BN are added to nitric acid, the mass-volume ratio of sodium nitrate, BN and nitric acid is 1:1:80, heating to 180°C, and reacting for 4 hours to obtain the hydroxyl-modified BN; the parameters of the electrostatic spraying are as follows: the flow rate is 1 mL / h, the distance is 12 cm, and the roller rotation speed is 100 r / min.

[0016] Example 2

[0017] The preparation method of the BN-modified aramid electrospun membrane is as follows: S1. Aramid is dissolved in a DMAc ion solution of LiCl to obtain an aramid spinning solution with a concentration of 14 wt%, and the aramid spinning solution is electrospun at a voltage of 15 kV, a flow rate of 0.3 mL / h, a collection distance of 15 cm, and a roller rotation speed of 1000 r / min to obtain an aramid electrospun membrane; S2. The aramid fiber membrane is crushed into a flaky shape with an area of less than 0.5 cm 2 , and is placed under ultraviolet irradiation at a distance of 18 cm for 12 min to obtain an irradiated aramid fiber membrane; S3. The irradiation-modified aramid fiber membrane is immersed in an ethanol solution containing KH550 silane coupling agent, the mass ratio of silane coupling agent to aramid fiber membrane is 1:5, to obtain a silane coupling agent-modified aramid fiber membrane; S4. The hydroxyl-modified BN is added to anhydrous ethanol, stirred and uniformly dispersed to obtain a BN-OH dispersion liquid, the BN-OH dispersion liquid is used to load the aramid fiber membrane prepared in step S4 by electrostatic spraying, and the BN-OH is dried at a temperature of 60°C to obtain a BN-modified aramid electrospun membrane; The preparation method of the hydroxyl-modified BN is as follows: sodium nitrate and BN are added to nitric acid, the mass-volume ratio of sodium nitrate, BN and nitric acid is 1:1:50, heating to 200°C, and reacting for 46 hours to obtain the hydroxyl-modified BN; the parameters of the electrostatic spraying are as follows: the flow rate is 1.5 mL / h, the distance is 15 cm, and the roller rotation speed is 1000 r / min.

[0018] Example 3

[0019] A preparation method of the BN modified aramid electrospinning membrane is as follows: S1. Dissolve aramid in a DMAc ion solution of LiCl to obtain aramid spinning solution with a concentration of 12wt%, electrospin the aramid spinning solution, the voltage of electrospinning is 17kV, the flow rate is 0.4mL / h, the collection distance is 15cm, and the drum rotation speed is 500r / min to obtain aramid electrospinning membrane; S2. Crush the aramid fiber membrane to a flaky shape with an area less than 0.5cm 2 Place the aramid fiber membrane under ultraviolet irradiation at a distance of 15cm for 8min to obtain the irradiated aramid fiber membrane; S3. Dip the aramid fiber membrane modified by irradiation into an ethanol solution containing KH550 silane coupling agent, the mass ratio of silane coupling agent to aramid fiber membrane is 1:5 to obtain the aramid fiber membrane modified by silane coupling agent; S4. Add hydroxyl modified BN to anhydrous ethanol, stir to disperse uniformly to obtain BN-OH dispersion, load the BN-OH on the surface of the aramid fiber membrane prepared in step S4 by electrostatic spraying, and dry at a temperature of 60℃ to obtain the BN modified aramid electrospinning membrane; The preparation method of the hydroxyl modified BN is as follows: add sodium nitrate and BN to nitric acid, the mass-volume ratio of sodium nitrate, BN and nitric acid is 1.5:1.4:90, heat to 200℃, and react for 5h to obtain the hydroxyl modified BN; the parameters of electrostatic spraying are as follows: flow rate is 1.2mL / h, distance is 14cm, and drum rotation speed is 500r / min.

[0020] Example 4

[0021] A wear-resistant rubber roller material, the rubber layer of the rubber roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer and a high-toughness adhesive layer; The preparation method of the wear-resistant rubber roller material described above comprises the following steps: Step 1: Put 60 parts of nitrile rubber (N3305E), 25 parts of chlorinated polyethylene (YEC-5505T), 6 parts of flaky graphene and 4 parts of the BN modified aramid electrospinning membrane prepared in Example 1 into a banbury mixer, add 2 parts of vulcanizing agent dicumyl peroxide, mix at 80℃ for 15min, and then press the wear-resistant layer rubber material with a thickness of 3.5mm through a calender; Step 2: Blend EVA resin (Lotrene VS430) 50 parts with natural rubber (SCR10) 35 parts, add ultra-fine sodium bicarbonate 10 parts, zinc oxide 4 parts, and add sulfur 1 part, tetramethylthiuram disulfide 0.8 parts, and mix at low speed at 60°C for 10 minutes, and extrude through an extruder to obtain an elastic buffer layer with a thickness of 6.1 mm; Step 3: Add SEBS-g-MAH (FG1901) 4 parts, silane coupling agent KH550 2 parts, sulfur 1.5 parts, and CZ 1.2 parts to the natural rubber grafted with maleic anhydride 80 parts, and mix at 70°C for 8 minutes, and then press through a calender to obtain a high-toughness adhesive layer with a thickness of 1.6 mm; Step 4: Press a rhombic convex array on the surface of the rubber wear-resistant layer, with one rhombic unit per 100 μm, an adjacent unit spacing of 70 μm, and a convex depth of 30 μm; Step 5: Wind the three-layer rubber layer on the sandblasted steel core in sequence, with the high-toughness adhesive layer directly wrapped on the steel core, and then wrap the elastic buffer layer and the rubber wear-resistant layer in sequence, and use a step-by-step vulcanization process, first curing at 120°C for 20 min, then crosslinking at 150°C for 30 min, and finally setting at 130°C for 20 min, with the pressure remaining unchanged at 6 MPa during the vulcanization process, to obtain a wear-resistant rubber roller material; The preparation method of the natural rubber grafted with maleic anhydride is as follows: first, add natural rubber to a plastic mixer and plasticize, with a plasticizing temperature of 105°C and a plasticizing time of 3 min, then weigh the grafting monomer MAH and the co-monomer St, with a mass ratio of natural rubber:MAH:St being 100:3:3, mix them together, and add them to the plastic mixer for mixing, with a mixing temperature of 110°C and a mixing time of 3 min, to obtain the natural rubber grafted with maleic anhydride.

[0022] Example 5

[0023] A wear-resistant rubber roller material, wherein the rubber layer of the rubber roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer, and a high-toughness adhesive layer. The preparation method of the wear-resistant rubber roller material described above, comprising the following steps: Step 1: Put nitrile rubber (N3305E) 70 parts and chlorinated polyethylene (YEC-5505T) 30 parts into a plastic mixer, add 10 parts of flaky graphene and 7 parts of BN modified aramid electrostatic spinning film prepared in Example 2, and simultaneously add 2.5 parts of dicumyl peroxide as a vulcanizing agent, and mix at 80°C for 15 min, and then press through a calender to obtain a wear-resistant layer with a thickness of 4.0 mm; Step 2: blend EVA resin (Lotrene VS430) 65 parts with natural rubber (SCR10) 42 parts, add ultra-fine sodium bicarbonate 12 parts, zinc oxide 5 parts, and add sulfur 1.2 parts, tetramethylthiuram disulfide 0.5 parts, extrude through an extruder at 60°C for 10 minutes, and obtain an elastic buffer layer with a thickness of 5.8 mm; Step 3: add SEBS-g-MAH (FG1901) 8 parts, silane coupling agent KH550 3 parts, sulfur 2.2 parts, and CZ 1.5 parts to 100 parts of maleic anhydride grafted natural rubber, mix at 70°C for 8 minutes, and press through a calender to obtain a high-toughness adhesive layer with a thickness of 1.5 mm; Step 4: press a rhombic convex array on the surface of the rubber wear-resistant layer, with one rhombic unit every 150 μm, a spacing of 50 μm between adjacent units, and a convex depth of 50 μm; Step 5: wind the three-layer rubber layer on a sandblasted steel core in sequence, with the high-toughness adhesive layer directly wrapped on the steel core, and then wrap the elastic buffer layer and the rubber wear-resistant layer in sequence, to obtain a wear-resistant rubber roller material by using a step-by-step vulcanization process.

[0024] Preferably, the step 2 step-by-step vulcanization process is first cured at 120°C for 20 minutes, then cross-linked at 150°C for 30 minutes, and finally shaped at 130°C for 20 minutes, with the pressure remaining unchanged during the vulcanization process, and the pressure being 10 MPa; The preparation method of the maleic anhydride grafted natural rubber is as follows: first, add natural rubber to a plastic mixer and plasticize, with a plasticizing temperature of 105°C and a plasticizing time of 3 minutes; then, weigh the grafting monomer MAH and the co-monomer St, with a mass ratio of natural rubber: MAH: St being 100:3:3, mix them together, and add them to the plastic mixer for mixing, with a mixing temperature of 110°C and a mixing time of 3 minutes, to obtain the maleic anhydride grafted natural rubber.

[0025] Example 6

[0026] A wear-resistant rubber roller material, wherein the rubber layer of the rubber roller material has a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer, and a high-toughness adhesive layer. The preparation method of the wear-resistant rubber roller material described above, comprising the following steps: Step 1: add nitrile rubber (N3305E) 62 parts and chlorinated polyethylene (YEC-5505T) 26 parts to a plastic mixer, add 7 parts of flaky graphene and 5 parts of the BN modified aramid electrostatic spinning film prepared in Example 3, and simultaneously add 2.2 parts of dicumyl peroxide as a vulcanizing agent, mix at 80°C for 15 minutes, and press through a calender to obtain a wear-resistant layer with a thickness of 3.5 mm. Step 2: Blend EVA resin (Lotrene VS430) 55 parts with natural rubber (SCR10) 40 parts, add ultra-fine sodium bicarbonate 10 parts, zinc oxide 4 parts, and add vulcanizing agent sulfur 1 part, accelerator tetramethylthiuram disulfide 0.6 parts, mix at low speed at 60°C for 10 minutes, extrude through an extruder to obtain an elastic buffer layer rubber with a thickness of 5.5 mm; Step 3: Add SEBS-g-MAH (FG1901) 5 parts, silane coupling agent KH550 2 parts, vulcanizing agent sulfur 1.8 parts, and accelerator CZ 1.5 parts to 85 parts of maleic anhydride grafted natural rubber, mix at 70°C for 8 minutes, and then press the mixed rubber through a calender to obtain a high-toughness adhesive layer rubber with a thickness of 1.2 mm; Step 4: Press a rhombic convex array on the surface of the rubber wear-resistant layer rubber, with one rhombic unit every 150 μm, an adjacent unit spacing of 50 μm, and a convex depth of 50 μm; Step 5: Wind the three-layer rubber of the rubber layer on a sandblasted steel core in sequence, with the high-toughness adhesive layer directly wrapped on the steel core, and then wrap the elastic buffer layer and the rubber wear-resistant layer in sequence, use a step-by-step vulcanization process, first cure at 120°C for 20 min, then crosslink at 150°C for 30 min, and finally set at 130°C for 20 min, with the pressure remaining unchanged during the vulcanization process, and the pressure range being 7 MPa, to obtain a wear-resistant rubber roller material; The preparation method of the maleic anhydride grafted natural rubber is as follows: first, add natural rubber to a plastic mixer and plasticize, with a plasticizing temperature of 105°C and a plasticizing time of 3 min, then weigh the grafting monomer MAH and the comonomer St, with a mass ratio of natural rubber: MAH: St being 100:3:3, mix the two, add them to the plastic mixer, and mix at a temperature of 110°C for 3 min, to obtain the maleic anhydride grafted natural rubber.

[0027] Example 7

[0028] A wear-resistant rubber roller material, the rubber layer of the roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer, and a high-toughness adhesive layer. The preparation method of the wear-resistant rubber roller material described above includes the following steps: Step 1: Put nitrile rubber (N3305E) 67 parts and chlorinated polyethylene (YEC-5505T) 28 parts into a plastic mixer, add 9 parts of flaky graphene and 6 parts of the BN modified aramid electrostatic spinning film prepared in Example 3, and simultaneously add 2.4 parts of the vulcanizing agent dicumyl peroxide, mix at 80°C for 15 min, and then press the mixed rubber through a calender to obtain a wear-resistant layer rubber with a thickness of 4.2 mm; Step 2: Blend EVA resin (Lotrene VS430) 60 parts with natural rubber (SCR10) 38 parts, add ultra-fine sodium bicarbonate 12 parts, zinc oxide 5 parts, and add sulfur 1.2 parts, tetramethylthiuram disulfide 0.7 parts, extrude through an extruder at 60°C for 10 minutes, and obtain an elastic buffer layer with a thickness of 5.8 mm; Step 3: Add SEBS-g-MAH (FG1901) 7 parts, silane coupling agent KH550 3 parts, sulfur 2 parts, and CZ 1.2 parts to the grafted natural rubber 95 parts, mix at 70°C for 8 minutes, and then press through a calender to obtain a high-toughness adhesive layer with a thickness of 1.5 mm; Step 4: Press a rhombic convex array on the surface of the rubber wear-resistant layer, with one rhombic unit per 100 μm, an adjacent unit spacing of 50 μm, and a convex depth of 30 μm; Step 5: Wind the three-layer rubber layer on the sandblasted steel core, and then wrap the high-toughness adhesive layer, the elastic buffer layer, and the rubber wear-resistant layer in sequence, use a step-by-step vulcanization process, first cure at 120°C for 20 min, then cross-link at 150°C for 30 min, and finally set at 130°C for 20 min, with a constant pressure of 9 MPa, to obtain a wear-resistant rubber roller material. The preparation method of the grafted natural rubber is as follows: first, plasticize the natural rubber in an internal mixer at a temperature of 105°C for 3 min, then mix the grafting monomer MAH and the co-monomer St in a mass ratio of 100:3:3, and then add them to the internal mixer and mix at a temperature of 110°C for 3 min to obtain the grafted natural rubber.

[0029] Example 8

[0030] A wear-resistant rubber roller material, wherein the rubber layer of the rubber roller material has a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer, and a high-toughness adhesive layer. The preparation method of the wear-resistant rubber roller material described above, comprising the following steps: Step 1: Put nitrile rubber (N3305E) 65 parts and chlorinated polyethylene (YEC-5505T) 27 parts into an internal mixer, add 8 parts of sheet-shaped graphene and 5.5 parts of the BN-modified aramid electrostatic spinning film prepared in Example 3, and add 2.3 parts of dicumyl peroxide as a vulcanizing agent, mix at 80°C for 15 min, and then press through a calender to obtain a wear-resistant layer with a thickness of 4.2 mm; Step 2: Blend EVA resin (Lotrene VS430) 58 parts with natural rubber (SCR10) 40 parts, add ultra-fine sodium bicarbonate 11 parts, zinc oxide 4.5 parts, and add vulcanizing agent sulfur 1.2 parts, accelerator tetramethylthiuram disulfide 0.6 parts, mix at low speed at 60℃ for 10 minutes, extrude through an extruder to obtain an elastic buffer layer rubber with a thickness of 5.6mm; Step 3: Add SEBS-g-MAH (FG1901) 6 parts, silane coupling agent KH550 2.5 parts, vulcanizing agent sulfur 2 parts, and accelerator CZ 1.3 parts to the maleic anhydride grafted natural rubber 90 parts, mix at 70℃ for 8 minutes, and then press through a calender to obtain a high-toughness adhesive layer rubber with a thickness of 1.6mm; Step 4: Press a rhombic convex array on the surface of the rubber wear-resistant layer rubber, with one rhombic unit per 100μm, an adjacent unit spacing of 50μm, and a convex depth of 30μm; Step 5: Wind the three-layer rubber of the rubber layer on a sandblasted steel core in sequence, with the high-toughness adhesive layer directly coated on the steel core, and then sequentially coat the elastic buffer layer and the rubber wear-resistant layer, adopt a stepwise vulcanization process, first cure at 120℃ for 20min, then crosslink at 150℃ for 30min, and finally set at 130℃ for 20min, with the pressure kept unchanged during the vulcanization process, and the pressure range being 8MPa, to obtain a wear-resistant rubber roller material; The preparation method of the maleic anhydride grafted natural rubber is as follows: first, add natural rubber to a Banbury mixer and plasticize, with a plasticizing temperature of 105℃ and a plasticizing time of 3min, then weigh the grafting monomer MAH and the comonomer St, with a mass ratio of natural rubber:MAH:St being 100:3:3, mix them together and add to the Banbury mixer for mixing, with a mixing temperature of 110℃ and a mixing time of 3min, to obtain the maleic anhydride grafted natural rubber.

[0031] Comparative Example 1 The difference between Comparative Example 1 and Example 8 is that a multi-layer structure is not used, and only the rubber wear-resistant layer is present. A wear-resistant rubber roller material, the rubber layer of the rubber roller material comprising a rubber wear-resistant layer; The preparation method of the wear-resistant rubber roller material described above comprises the following steps: Step 1: Put nitrile rubber (N3305E) 65 parts and chlorinated polyethylene (YEC-5505T) 27 parts into a Banbury mixer, add 8 parts of flaky graphene and 5.5 parts of BN modified aramid electrostatic spinning film prepared in Example 3, and simultaneously add 2.3 parts of vulcanizing agent dicumyl peroxide, mix at 80℃ for 15min, and then press through a calender to obtain a wear-resistant layer rubber with a thickness of 10mm; Step 2: Pressing a diamond convex array on the surface of the rubber wear-resistant layer compound, the convex array is distributed as one diamond unit per 100 μm, the spacing between adjacent units is 50 μm, and the convex depth is 30 μm; Step 3: Wrapping the rubber wear-resistant layer on the sandblasted steel core, crosslinking at 150℃ for 30min, the pressure during vulcanization is 8MPa, and the wear-resistant rubber roller material is obtained.

[0032] Comparative Example 2 The difference between Comparative Example 2 and Example 8 is that no ultra-fine sodium bicarbonate is added to the elastic buffer layer. A wear-resistant rubber roller material, the rubber layer of the roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer and a high-toughness adhesive layer. The preparation method of the above-mentioned wear-resistant rubber roller material, including the following steps: Step 1: Put 65 parts of nitrile rubber (N3305E) and 27 parts of chlorinated polyethylene (YEC-5505T) into an internal mixer, add 8 parts of flaky graphene and 5.5 parts of BN modified aramid electrostatic spinning film prepared in Example 3, and add 2.3 parts of vulcanizing agent dicumyl peroxide at the same time, mix at 80℃ for 15min, and then press into a wear-resistant layer compound with a thickness of 4.2mm by a calender; Step 2: Blend 58 parts of EVA resin (Lotrene VS430) with 40 parts of natural rubber (SCR10), add 4.5 parts of zinc oxide, and add 1.2 parts of vulcanizing agent sulfur and 0.6 parts of accelerator tetramethyl thiuram disulfide, mix at low speed at 60℃ for 10min, and then extrude the elastic buffer layer compound with a thickness of 5.6mm by an extruder; Step 3: Add 6 parts of SEBS-g-MAH (FG1901), 2.5 parts of silane coupling agent KH550, 2 parts of vulcanizing agent sulfur and 1.3 parts of accelerator CZ to 90 parts of maleic anhydride grafted natural rubber, mix at 70℃ for 8min, and then press into a high-toughness adhesive layer compound with a thickness of 1.6mm by a calender; Step 4: Press a diamond convex array on the surface of the rubber wear-resistant layer compound, the convex array is distributed as one diamond unit per 100 μm, the spacing between adjacent units is 50 μm, and the convex depth is 30 μm; Step 5: Wrap the three-layer rubber layer compound on the sandblasted steel core in turn, the high-toughness adhesive layer is directly coated on the steel core, and then the elastic buffer layer and the rubber wear-resistant layer are coated in turn, using a stepwise vulcanization process, first curing at 120℃ for 20min, then crosslinking at 150℃ for 30min, and finally setting at 130℃ for 20min, the pressure remains unchanged during vulcanization, the pressure range is 8MPa, and the wear-resistant rubber roller material is obtained; The preparation method of the natural rubber grafted with maleic anhydride is as follows: the natural rubber is first added into a plastic mixer for plasticizing, the plasticizing temperature is 105°C, and the plasticizing time is 3 minutes; then the grafted monomer MAH and the co-monomer St are weighed, the mass ratio of the natural rubber, MAH and St is 100:3:3, the mixture is added into the plastic mixer for mixing, the mixing temperature is 110°C, and the mixing time is 3 minutes, to obtain the natural rubber grafted with maleic anhydride.

[0033] Comparative Example 3 The difference between Comparative Example 3 and Example 8 is that the chlorinated polyethylene is not added in the rubber wear-resistant layer.

[0034] Comparative Example 4 The difference between Comparative Example 4 and Example 8 is that the BN modified aramid electrospun membrane is not added in the rubber wear-resistant layer, and the aramid electrospun membrane is directly added.

[0035] Comparative Example 5 The difference between Comparative Example 5 and Example 8 is that the sheet-shaped graphene is not added in the rubber wear-resistant layer.

[0036] Comparative Example 6 The difference between Comparative Example 6 and Example 8 is that the diamond convex array is not pressed on the surface of the rubber wear-resistant layer.

[0037] Comparative Example 7 The difference between Comparative Example 7 and Example 8 is that the step-by-step vulcanization process is not adopted. A wear-resistant rubber roller material, the rubber layer of the rubber roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer and a high-toughness adhesive layer; The preparation method of the wear-resistant rubber roller material described above, including the following steps: Step 1: 65 parts of butyl rubber (N3305E), 27 parts of chlorinated polyethylene (YEC-5505T), 8 parts of sheet-shaped graphene and 5.5 parts of the BN modified aramid electrospun membrane prepared in Example 3 are put into a plastic mixer, 2.3 parts of a vulcanizing agent, i.e., dicumyl peroxide, is added, and mixing is carried out at 80°C for 15 minutes; after mixing, the wear-resistant layer rubber material with a thickness of 4.2mm is pressed by a calender; Step 2: 58 parts of EVA resin (Lotrene VS430) and 40 parts of natural rubber (SCR10) are blended, 11 parts of superfine sodium bicarbonate, 4.5 parts of zinc oxide, 1.2 parts of a vulcanizing agent, i.e., sulfur, and 0.6 parts of an accelerator, i.e., tetramethylthiuram disulfide, are added, and low-speed mixing is carried out at 60°C for 10 minutes; the elastic buffer layer rubber material with a thickness of 5.6mm is extruded by an extruder; Step 3: 90 parts of the maleic anhydride grafted natural rubber, 6 parts of SEBS-g-MAH (FG1901), 2.5 parts of silane coupling agent KH550, 2 parts of sulfur vulcanizing agent, and 1.3 parts of CZ accelerator were mixed at 70℃ for 8 minutes. After mixing, the high-toughness adhesive layer rubber material with a thickness of 1.6 mm was prepared by a calender; Step 4: A rhombic convex array was pressed on the surface of the rubber wear-resistant layer rubber material, with one rhombic unit arranged every 100 μm, an adjacent unit spacing of 50 μm, and a convex depth of 30 μm; Step 5: The three-layer rubber material of the rubber layer was wound on the sandblasted steel core in sequence, the high-toughness adhesive layer was directly coated on the steel core, and then the elastic buffer layer and the rubber wear-resistant layer were coated in sequence. The rubber roller material was obtained by vulcanization at 150℃ for 40 min under a vulcanization pressure of 8 MPa. The preparation method of the maleic anhydride grafted natural rubber is as follows: the natural rubber is first plasticized in an internal mixer at a plasticizing temperature of 105℃ for 3 min, then the grafting monomer MAH and the comonomer St are weighed, the mass ratio of the natural rubber, MAH and St is 100:3:3, and the mixture is mixed in the internal mixer at a mixing temperature of 110℃ for 3 min to obtain the maleic anhydride grafted natural rubber.

[0038] Performance test: The abrasion performance is tested according to GB / T 9867-2008, and the rubber resilience is determined according to GB / T 1681-2009.

[0039] Resilience / % Volume wear cm 3 / 1.61 km Example 4 11.2 0.068 Example 5 11.3 0.069 Example 6 10.9 0.062 Example 7 11.2 0.067 Example 8 10.9 0.068 Comparative Example 1 8.6 0.065 Comparative Example 2 8.9 0.067 Comparative Example 3 10.9 0.122 Comparative Example 4 11.2 0.092 Comparative Example 5 11.3 0.090 Comparative Example 6 11.0 0.103 Comparative Example 7 10.8 0.088 Obviously, the above examples are only examples for clearly illustrating, but not limitation of the embodiments. For those skilled in the art, other different forms of changes or variations can be made on the basis of the above description. Here, all the embodiments need not and cannot be exhausted. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A wear resistant rubber roll material characterized by: The rubber layer of the glue roller material adopts a multi-layer composite structure, including a rubber wear-resistant layer, an elastic buffer layer and a high-toughness adhesive layer, the thickness of the rubber wear-resistant layer is 3-5mm, the thickness of the elastic buffer layer is 5-8mm, and the thickness of the high-toughness adhesive layer is 1-2mm.

2. The method of making an abrasion resistant rubber roll material of claim 1, wherein, The method comprises the following steps: Step 1: pressing a rhombic convex array on the surface of the rubber wear-resistant layer glue, the convex array is distributed as one rhombic unit every 100-150μm, the spacing between adjacent units is 50-70μm, and the depth of the convex is 30-50μm; Step 2: winding the three layers of rubber layer glue on the sandblasted steel core in sequence, the high-toughness adhesive layer is directly coated on the steel core, then the elastic buffer layer and the rubber wear-resistant layer are coated in sequence, and a step-by-step vulcanization process is adopted to obtain the wear-resistant rubber glue roller material.

3. The method of making an abrasion resistant rubber roll material of claim 2, wherein: The step 2 step-by-step vulcanization process is first cured at 120℃ for 20min, then crosslinked at 150℃ for 30min, and finally shaped at 130℃ for 20min, and the pressure remains unchanged during the vulcanization process, and the pressure range is 6-10MPa.

4. The abradable rubber roll material of claim 1, wherein: The rubber wear-resistant layer comprises the following components in parts by weight: 60-70 parts of nitrile rubber, 25-30 parts of chlorinated polyethylene, 4-7 parts of BN modified aramid electrostatic spinning film, 6-10 parts of sheet-shaped graphene, and 2-2.5 parts of dicumyl peroxide; wherein the preparation method of the BN modified aramid electrostatic spinning film is: S1. Dissolving aramid in a DMAc ion solution of LiCl to obtain aramid spinning solution, and electrostatic spinning the aramid spinning solution to obtain aramid electrostatic spinning film; S2. The aramid fiber membrane is crushed to a sheet shape with an area less than 0.5 cm 2 , and placed under ultraviolet irradiation to obtain an irradiated aramid fiber membrane; S3. Immersing the aramid fiber film modified by irradiation in an ethanol solution containing KH550 silane coupling agent to obtain aramid fiber film modified by silane coupling agent; S4. Adding hydroxyl modified BN to anhydrous ethanol, stirring and dispersing uniformly to obtain BN-OH dispersion, and loading the BN-OH on the surface of the aramid fiber film prepared in step S4 by electrostatic spraying, and drying at a temperature of 60℃ to obtain BN modified aramid electrostatic spinning film.

5. The abradable rubber roll material of claim 2, wherein: The concentration of the aramid spinning solution in S1 is 8-14wt%; the voltage of the electrostatic spinning is 15-20kV, the flow rate is 0.3-0.6mL / h, the collection distance is 15-17cm, and the drum rotation speed is 100-1000r / min.

6. The abradable rubber roll material of claim 2, wherein: The ultraviolet irradiation distance in S2 is 12-18cm, and the time is 5-12min.

7. The abradable rubber roll material of claim 2, wherein: The preparation method of the hydroxyl modified BN in S4 is: adding sodium nitrate and BN to nitric acid, the mass-volume ratio of sodium nitrate, BN and nitric acid is 1-2:1-2:80-100, heating to 180-200℃, and reacting for 4-6h to obtain hydroxyl modified BN; the parameters of the electrostatic spraying are: flow rate is 1-1.5mL / h, distance is 12-15cm, and drum rotation speed is 100-1000r / min.

8. The abradable rubber roll material of claim 1, wherein: The elastic buffer layer comprises the following components in parts by weight: 50-65 parts of EVA resin, 35-42 parts of natural rubber, 10-12 parts of ultra-fine sodium bicarbonate, 4-5 parts of zinc oxide, 1-1.2 parts of sulfur, 0.5-0.8 parts of tetramethylthiuram disulfide. The high-toughness adhesive layer comprises the following components by weight: 80-100 parts of maleic anhydride grafted natural rubber, 4-8 parts of SEBS-g-MAH (FG1901), 1.5-2.2 parts of sulfur, 1.2-1.5 parts of accelerator CZ, and 2-3 parts of silane coupling agent.