High-temperature-resistant low-compression spinning rubber roller and preparation method thereof

Abstract

The invention relates to a high-temperature-resistant low-compression spinning rubber covered roller and a preparation method thereof.The high-temperature-resistant low-compression spinning rubber covered roller comprises an alloy roller core and a rubber blending material layer, the alloy roller core is wrapped with the rubber blending material layer, and the rubber blending material layer is characterized by comprising, by weight, 50-70 parts of carboxy nitrile rubber; 20 to 30 parts of butyronitrile-isoprene rubber; 10 to 20 parts of phenyl siloxane rubber; 5-10 parts of a nano reinforcing agent; 3 to 10 parts of an antistatic agent; 5-8 parts of zinc oxide; 2-4 parts of an accelerant; 5 parts of titanium dioxide; 1-2 parts of an anti-aging agent; 1-3 parts of a functional auxiliary agent; the antistatic rubber has the advantages that the compression set of the rubber at high temperature is reduced, the antistatic property and the rebound rate of the rubber are improved, the toughness and the hardness are good, serious elasticity attenuation of a rubber roller in the working process is avoided, and the service life of the rubber roller is effectively prolonged.

Description

Technical Field

[0001] The present invention relates to the field of spinning equipment, and particularly relates to a high-temperature resistant and low-compression spinning rubber roller and a preparation method thereof. Background Art

[0002] The spinning rubber roller is a core component of the drafting system of a spinning frame. The spinning rubber roller undertakes the work of pulling the yarn, and the quality of the spinning rubber roller is directly related to the quality and production efficiency of yarn production.

[0003] The working speed of the spinning rubber roller is generally above 20,000 revolutions per minute. The spinning rubber roller is in a high-speed and high-pressure working environment. At present, the spinning rubber roller is generally made of polyurethane material. Under high-speed friction and long-term high pressure, the elastic attenuation occurs, resulting in uneven drafting, causing large fluctuations in the CV value quality of the yarn, and the spinning rubber roller also quickly heats up, resulting in a decrease in the hardness of the rubber roller and serious loss of physical and mechanical properties, and a significant reduction in the service life.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention discloses a high-temperature resistant and low-compression spinning rubber roller and a preparation method thereof.

[0006] The technical solution adopted by the present invention is as follows:

[0007] A high-temperature resistant and low-compression spinning rubber roller, comprising an alloy roller core and a rubber blend material layer, wherein the rubber blend material layer is wrapped around the alloy roller core, and is characterized in that the rubber blend material layer comprises components counted by weight parts: carboxylated nitrile rubber, 50-70 parts; nitrile-isoprene rubber, 20-30 parts; phenyl silicone rubber, 10-20 parts; nano-enhancer, 5-10 parts; antistatic agent, 3-10 parts; zinc oxide, 5-8 parts; accelerator, 2-4 parts; titanium dioxide, 5 parts; antioxidant, 1-2 parts; functional additive, 1-3 parts; vulcanizing agent, 2-7 parts, electrostatic plasticizer, 4-7 parts.

[0008] Further, the acrylonitrile unit weight percentage content of the carboxylated nitrile rubber is 35%, the carboxylic acid weight percentage content in the carboxylated nitrile rubber is 0.2-0.8%, and the Mooney viscosity (ML 100℃ 1+4 ) of the raw rubber of the carboxylated nitrile rubber is 40-55.

[0009] Further, the Mooney viscosity (ML 100℃ 1+4 ) of the raw rubber of the nitrile-isoprene rubber is 45.5.

[0010] Further, the nano-enhancer is a composite of nano-silica and boron nitride, and the mass ratio of nano-silica to boron nitride is 3:1.

[0011] Further, the antistatic agent is ethoxylated amine.

[0012] Further, the accelerator is N, N'-dimethyl-N, N-diphenyl-p-phenylenediamine.

[0013] Further, the functional additive is Si-69 silane coupling agent, and the electrostatic plasticizer is TP90B.

[0014] Further, the vulcanizing agent is sulfur compound modified with distearyl thiodipropionate.

[0015] Further, the antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine.

[0016] A preparation method of a high-temperature resistant and low-compression spinning rubber roller comprises the following steps:

[0017] Step S1, batching, preparing each raw material according to the designed ratio for standby;

[0018] Step S2, intensive mixing, adding carboxy nitrile rubber, nitrile-isoprene rubber and phenyl silicone rubber into an internal mixer for rubber blending, floating the internal mixer for 1-2 minutes, then at 80-110°C, with an intensive mixing time of 2-4 minutes, and then adding the nano-enhancer, antistatic agent, zinc oxide, accelerator, titanium dioxide, antioxidant, functional additive into the internal mixer. After that, the internal mixer floats for 10-20 seconds and then the upper plug is pressed down. At 100-130°C, with an intensive mixing time of 4-6 minutes, a mixed rubber is obtained;

[0019] Step S3, adding vulcanizing agent for mixing, adding the vulcanizing agent and accelerator into the internal mixer, with a mixing temperature of 90-120°C and a mixing time of 2-4 minutes. Then the mixture is taken out, on an open mill, the roll gap is adjusted to ≤1.5 mm, and it is passed through thinly for 4-6 times, and the thickened sheet is taken off and parked for 8-12 hours to form a mixed rubber material to be filtered;

[0020] Step S4, re-mixing and sheet taking, putting the rubber material obtained in step S3 into a rubber mill, adjusting the roll gap to ≤1.5 mm, passing through thinly for 4-6 times, and taking off the sheet and parking for 8-12 hours for standby;

[0021] Step S5, filtering, putting the rubber material obtained in step S4 into a rubber mill, adjusting the roll gap to ≤1.5 mm, passing through thinly for 4-6 times, and taking off the sheet and parking for 8-12 hours for standby;

[0022] Step S6, extrusion and winding: extrude the rubber compound obtained in step S5 using a cold-feed extruder, and wind the extruded rubber strip around the pretreated alloy roll core to obtain a rubber roll;

[0023] Step S7, vulcanization: vulcanize the rubber roll obtained in step S6 in a vulcanizing autoclave in stages, with pre-vulcanization at 140°C for 10 minutes and final vulcanization at 160°C for 70 minutes;

[0024] Step S8, surface treatment: coat the rubber roll with a magnetron sputtering antistatic coating, with a coating thickness of 2 - 5 μm.

[0025] The beneficial effects of the present invention are as follows:

[0026] 1. By using carboxy nitrile rubber, nitrile-isoprene rubber, and phenyl silicone rubber for ternary blending modification and combining with distearyl thiodipropionate composite modified sulfur, the double bonds in the molecular chain will undergo a cross-linking reaction with sulfur to form cross-links such as polysulfide bonds or monosulfide bonds, transforming the rubber molecular chain from a linear structure into a three-dimensional network structure, reducing the compression set of the rubber, increasing the rubber rebound rate, and having good toughness and hardness, avoiding serious elastic attenuation during the operation of the rubber roll and effectively extending the service life of the rubber roll.

[0027] 2. Adding a composite of nano-silica and boron nitride to the ternary rubber system forms a heat conduction channel, through which heat can be quickly transferred, making the heat inside the rubber more evenly distributed and reducing local overheating phenomena, thereby improving the heat resistance of the rubber. Moreover, the silanol groups on the surface of nano-silica can react with the active groups in the rubber molecules to form chemical bonds, and boron nitride can also fill between the rubber molecular chains through its interaction with the rubber molecules, making the network structure of the rubber more compact and stable.

[0028] 3. Ethoxylated amine is used as an antistatic agent in the rubber system. The molecules of ethoxylated amine may undergo partial ionization to produce positively charged ammonium ions and negatively charged oxygen anions. These ions can act as carriers between the rubber molecular chains. Under the action of an external electric field, the ions can move directionally, thereby achieving charge transmission and forming a conductive channel, reducing the resistance of the rubber roll and avoiding excessive electrostatic accumulation. Since static electricity can attract fibers, the fiber adhesion rate is reduced.

[0029] 4. The accelerator used is N, N’-dimethyl-N, N-diphenyl-p-phenylenediamine, which contains active groups in its molecules and can interact with sulfur molecules. It can polarize sulfur molecules, promoting the cleavage of sulfur molecules to generate sulfur free radicals with higher reactivity. These sulfur free radicals can react more quickly with the double bonds or active hydrogen atoms on the rubber molecular chain to promote vulcanization. Description of the Drawings

[0030] Figure 1It is a schematic cross-sectional structure diagram of a high-temperature resistant and low-compression spinning rubber roller.

[0031] Figure 2 It is a schematic diagram of the steps of a preparation method of a high-temperature resistant and low-compression spinning rubber roller.

[0032] In the figure: 1. Alloy roller core; 2. Rubber blend material layer; 21. Outer layer; 22. Intermediate layer. Specific embodiments

[0033] The following combines with the attached drawings to illustrate the specific embodiments of the present invention.

[0034] Example 1:

[0035] A high-temperature resistant and low-compression spinning rubber roller, as Figure 1 described, includes an alloy roller core and a rubber blend material layer, wherein the rubber blend material layer is wrapped on the outer surface of the alloy roller core. The rubber blend material layer includes an outer layer and an intermediate layer. The thickness requirement of the outer layer is 1.8 - 2.4 mm, and the Shore hardness requirement is 70 ± 5. The thickness requirement of the intermediate layer is 2.2 - 2.6 mm, and the Shore hardness requirement is 80 ± 5.

[0036] The rubber blend material layer includes components counted by weight:

[0037] Carboxylated nitrile rubber, 70 parts. The acrylonitrile unit weight percentage content in the carboxylated nitrile rubber is 35%, the carboxylic acid weight percentage content in the carboxylated nitrile rubber is 0.2%, and the Mooney viscosity (ML 100℃ 1+4 ) of the raw rubber is 40.

[0038] Nitrile-isoprene rubber, 20 parts. The Mooney viscosity (ML 100℃ 1+4 ) of its raw rubber is 45.5.

[0039] Phenyl silicone rubber, 10 parts.

[0040] The nano-enhancer is a composite of nano-silica and boron nitride, 5 parts. The composite of nano-silica and boron nitride is obtained by compounding 3.75 parts of nano-silica and 1.25 parts of boron nitride.

[0041] The antistatic agent is ethoxylated amine, 4 parts.

[0042] Zinc oxide, 5 parts.

[0043] The accelerator is N, N'-dimethyl-N, N-diphenyl-p-phenylenediamine (MTT), 1.4 parts.

[0044] The accelerator is N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 1.2 parts.

[0045] Titanium dioxide, 5 parts.

[0046] The antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (Antioxidant 4020), 1 part.

[0047] The functional additive is Si-69 silane coupling agent, 1 part.

[0048] The vulcanizing agent is distearyl thiodipropionate compound modified sulfur (DSTDP), 4 parts.

[0049] The electrostatic plasticizer is TP90B, 5 parts.

[0050] A preparation method of a high-temperature resistant and low-compression spinning rubber roller, as Figure 2 shown, includes the following steps:

[0051] Step S1, batching, preparing each raw material according to the designed ratio for standby;

[0052] Step S2, intensive mixing, adding carboxylated nitrile rubber, nitrile-isoprene rubber and phenyl silicone rubber into the internal mixer for rubber blending, floating the internal mixer for 1 - 2 minutes, then at 80 - 110 °C, with an intensive mixing time of 2 - 4 minutes, then adding the nano-enhancer, antistatic agent, zinc oxide, accelerator, titanium dioxide, antioxidant, and functional additive into the internal mixer, then floating the internal mixer for 10 - 20 seconds and then pressing down the upper plug, at 100 - 130 °C, with an intensive mixing time of 4 - 6 minutes, lifting the upper plug, opening the tilting hopper, and turning out the mixture to obtain the mixed rubber;

[0053] Step S3, adding the vulcanizing agent for mixing, adding the vulcanizing agent and accelerator into the internal mixer, with an intensive mixing temperature of 90 - 120 °C, an intensive mixing time of 2 - 4 minutes, lifting the upper plug, opening the tilting hopper, turning out the mixture, on the open mill, adjusting the roll gap ≤ 1.5 mm, pulling 4 - 6 thin passes, putting on a thick sheet and parking for 8 - 12 hours to form the mixed rubber material to be filtered;

[0054] Step S4, remilling and sheeting, putting the rubber material obtained in Step S3 into the mill, adjusting the roll gap ≤ 1.5 mm, pulling 4 - 6 thin passes, putting on a sheet and parking for 8 - 12 hours for standby;

[0055] Step S5, filtering, putting the rubber material obtained in Step S4 into the mill, adjusting the roll gap ≤ 1.5 mm, pulling 4 - 6 thin passes, putting on a sheet and parking for 8 - 12 hours for standby;

[0056] Step S6, extrusion and winding, extruding the rubber material obtained in Step S5 on a cold feed extruder, and winding the extruded rubber strip on the pretreated alloy roll core to obtain the rubber roller;

[0057] Step S7, vulcanization: The rubber roller obtained in step S6 is vulcanized in sections in a vulcanizing autoclave, with pre-vulcanization at 140 °C for 10 min and final vulcanization at 160 °C for 70 min;

[0058] Step S8, surface treatment: A magnetron sputtering antistatic coating is applied to the rubber roller, and the coating thickness is 2 - 5 μm.

[0059] Example 2:

[0060] The difference from Example 1 lies in:

[0061] The rubber blend material layer includes components counted by weight parts:

[0062] Carboxylated nitrile rubber, 60 parts. The weight percentage of acrylonitrile units in the carboxylated nitrile rubber is 35%, the weight percentage of carboxylic acid in the carboxylated nitrile rubber is 0.5%, and the Mooney viscosity of the raw rubber of the carboxylated nitrile rubber (ML 100℃ 1+4 ) is 50.

[0063] Nitrile-isoprene rubber, 20 parts. Its Mooney viscosity of the raw rubber (ML 100℃ 1+4 ) is 45.5.

[0064] Phenyl silicone rubber, 20 parts.

[0065] The nano-enhancer is a composite of nano-silica and boron nitride, 8 parts. The composite of nano-silica and boron nitride is obtained by compounding 6 parts of nano-silica and 2 parts of boron nitride.

[0066] The antistatic agent is ethoxylated amine, 6 parts.

[0067] Zinc oxide, 5 parts.

[0068] The accelerator is N,N’-dimethyl-N,N-diphenyl-p-phenylenediamine (MTT), 1.5 parts.

[0069] The accelerator is N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 1 part.

[0070] Titanium dioxide, 5 parts.

[0071] The antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (antioxidant 4020), 2 parts.

[0072] The functional additive is Si-69 silane coupling agent, 2 parts.

[0073] The vulcanizing agent is didecyl thiodipropionate compound modified sulfur (DSTDP), 6 parts.

[0074] The electrostatic plasticizer is TP90B, 4 parts.

[0075] Example 3:

[0076] The difference from Example 1 is:

[0077] The rubber blend material layer comprises components counted by weight parts:

[0078] Carboxylated nitrile rubber, 55 parts. The acrylonitrile unit weight percentage content of the carboxylated nitrile rubber is 35%, the carboxylic acid weight percentage content in the carboxylated nitrile rubber is 0.8%, and the Mooney viscosity of the raw rubber of the carboxylated nitrile rubber (ML 100℃ 1+4 ) is 55.

[0079] Nitrile-isoprene rubber, 30 parts. Its Mooney viscosity of the raw rubber (ML 100℃ 1+4 ) is 45.5.

[0080] Phenyl silicone rubber, 10 parts.

[0081] The nano-enhancer is a composite of nano-silica and boron nitride, 6 parts. The composite of nano-silica and boron nitride is obtained by compounding 4.5 parts of nano-silica and 1.5 parts of boron nitride.

[0082] The antistatic agent is ethoxylated amine, 3 parts.

[0083] Zinc oxide, 8 parts.

[0084] The accelerator is N,N'-dimethyl-N,N-diphenyl-p-phenylenediamine (MTT), 1.2 parts.

[0085] The accelerator is N-cyclohexyl-2-benzothiazole sulfenamide (CZ), 1.8 parts.

[0086] Titanium dioxide, 5 parts.

[0087] The antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine (antioxidant 4020), 1 part.

[0088] The functional additive is Si-69 silane coupling agent, 1 part.

[0089] The vulcanizing agent is dithiodipropionic acid distearyl alcohol ester compound modified sulfur (DSTDP), 5 parts.

[0090] The electrostatic plasticizer is TP90B, 4 parts.

[0091] Performance testing of the rubber blend material layer:

[0092] Testing Standards: 《GB / T528》, 《GB / T531.1》, 《GB / T1689》, 《GB / T3512》, 《FZ / T90040.3》.

[0093] The test results are shown in Table 2.

[0094] Table 2

[0095]

[0096] Analysis of Test Results:

[0097] Under normal temperature conditions, the rubber blend material layer has good hardness, tensile strength, oil resistance and wear resistance. Under high temperature conditions, the hardness change is within 2, the tensile strength change is within 4%, and the elongation at break change is within -4%. In summary, the rubber blend material layer in normal temperature and high temperature environments

[0098] Performance Testing of Spinning Rubber Rollers:

[0099] Testing Standards: 《GB / T7759》, 《GB / T1681》

[0100] The test results are shown in Table 3.

[0101] Table 3

[0102]

[0103] Analysis of Test Results:

[0104] Under the conditions of extra-large draft, high speed and high temperature operation, the spinning rubber roller has strong anti-compression deformation ability and good elastic deformation, which greatly improves the service life of the spinning rubber roller.

[0105] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0106] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. A high temperature resistant and low compression spinning rubber roller, comprising an alloy roller core and a rubber blend material layer, wherein the rubber blend material layer is wrapped on the alloy roller core, characterized in that: The rubber blend material layer comprises the following components in parts by weight: Carboxylated nitrile rubber, 50-70 parts; Nitrile-isoprene rubber, 20-30 parts; Phenyl silicone rubber, 10-20 parts; Nano-enhancer, 5-10 parts; Antistatic agent, 3-10 parts; Zinc oxide, 5-8 parts; Accelerator, 2-4 parts; Titanium dioxide, 5 parts; Anti-aging agent, 1-2 parts; Functional additives, 1 to 3 parts; Curing agent, 2-7 parts; Electrostatic plasticizer, 4 to 7 parts.

2. A high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The weight percentage of acrylonitrile unit in the carboxylated nitrile rubber is 35%, the weight percentage of carboxylic acid in the carboxylated nitrile rubber is 0.2-0.8%, and the raw rubber Mooney viscosity (ML 100℃ 1+4 ) is 40 to 55.

3. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The raw Mooney viscosity (ML) of the nitrile-isoprene rubber 100℃ 1+4 ) is 45.

5.

4. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The nano-enhancer is a composite of nano-silicon dioxide and boron nitride, and the mass ratio of the nano-silicon dioxide to the boron nitride is 3:

1.

5. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The antistatic agent is ethoxylated amine.

6. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The accelerators are N, N'-dimethyl-N, N-diphenyl-p-phenylenediamine and N-cyclohexyl-2-benzothiazole sulfenamide.

7. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The functional auxiliary agent is Si-69 silane coupling agent, and the electrostatic plasticizer is TP90B.

8. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The vulcanizing agent is distearyl thiodipropionate composite modified sulfur.

9. The high temperature resistant and low compression spinning rubber roller according to claim 1, characterized in that: The antioxidant is N-(1,3-dimethylbutyl)-N'-phenyl-p-phenylenediamine.

10. A method for preparing a high temperature resistant and low compression spinning rubber roller according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, preparing ingredients according to the designed ratio; Step S2, mixing and kneading: adding carboxylated nitrile rubber, nitrile-isoprene rubber and phenyl silicone rubber to an internal mixer and mixing them; the internal mixer floats for 1 to 2 minutes, and then the internal mixer is kneaded at 80 to 110° C. for 2 to 4 minutes; then the nano-enhancer, antistatic agent, zinc oxide, accelerator, titanium dioxide, antioxidant and functional additive are added to the internal mixer; the internal mixer floats for 10 to 20 seconds, and then the upper push pin is pressed down; the internal mixer is kneaded at 100 to 130° C. for 4 to 6 minutes to obtain a mixed rubber; Step S3, adding vulcanizing agent and mixing, adding vulcanizing agent and accelerator into internal mixer, the internal mixing temperature is 90-120°C, the internal mixing time is 2-4 minutes, then the mixture is turned out, and on the open rubber mixer, the roller distance is adjusted to ≤1.5mm, 4-6 thin passes are pulled, and the thick lower sheet is placed and parked for 8-12 hours to form a mixed rubber material to be filtered; Step S4, re-refining and producing sheets, putting the rubber obtained in step S3 into a rubber mixing machine, adjusting the roller distance ≤ 1.5 mm, pulling 4 to 6 thin passes, and leaving the sheets for 8 to 12 hours for standby use; Step S5, filtering, putting the rubber obtained in step S4 into a rubber mixer, adjusting the roller distance ≤ 1.5 mm, pulling 4 to 6 thin passes, and leaving the lower sheet for 8 to 12 hours for standby use; Step S6, extrusion winding, extruding the rubber material obtained in step S5 through a cold feed extruder, and winding the extruded rubber strip on a pretreated alloy roller core to obtain a rubber roller; Step S7, vulcanization, the rubber roller obtained in step S6 is vulcanized in sections in a vulcanization tank, with a pre-vulcanization at 140°C for 10 minutes and a final vulcanization at 160°C for 70 minutes; Step S8, surface treatment: coating the rubber roller with a magnetron sputtering antistatic coating with a coating thickness of 2 to 5 μm.

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