Rubber roller for environment-friendly regenerated fibers

Abstract

The invention relates to an environment-friendly regenerated fiber rubber roller, which comprises an aluminum liner tube, a coating layer and an inner layer, the coating layer is arranged on the outer side surface of the aluminum liner tube, the inner layer is arranged on the inner wall surface of the aluminum liner tube, and the environment-friendly regenerated fiber rubber roller is characterized in that the coating layer and the inner layer comprise the following components in parts by weight: 100 parts of butyronitrile composite rubber and 6-8 parts of wear-resistant toughening material, 2-3 parts of a surface self-lubricating agent, 3-4.5 parts of an anti-impact modifier and 5-7 parts of white carbon black; 1.4 to 1.9 parts of an accelerant; 10-12 parts of a plasticizer; 1 to 2.0 parts of an anti-aging agent; 5-6 parts of sulfur; 6 parts of zinc oxide; the rubber composition has the advantages that a more uniform and more stable cross-linked network is formed in a system, so that the rubber can more uniformly transfer stress when being stressed, and a molecular chain can be more effectively and reversibly stretched and recovered; therefore, the elasticity and toughness of the rubber are improved, and the undesirable phenomena of swelling, winding, tearing damage and the like of the drafting rubber roller in the rubber roller spinning process are avoided.

Description

Technical Field

[0001] The invention relates to the field of textile drafting components, in particular to a rubber roller for environmentally friendly regenerated fibers. Background Art

[0002] Lyocell fiber is an environmentally friendly regenerated fiber made from natural cellulose. It is a new type of fiber made using solvent spinning technology. It has many excellent properties such as the softness and fit of cotton, the high strength of polyester, and the warmth retention of wool, making it the first choice for some high-end fabrics.

[0003] The orientation degree and regularity along the fiber axis of Lyocell fiber are higher than other regenerated cellulose fibers. However, the lateral lateral connections of the amorphous area of ​​Lyocell fiber are few and weak, and it is easy to crack to form fibrils, which makes processing difficult and forms cotton knots and short fluff. In order to avoid the above situation, manufacturers generally choose to use low-hardness rubber rollers with good elasticity, but the production mode is also mainly compact spinning, which is characterized by small stroke, high rocking arm pressure, and high twist. The surface wear resistance and tear strength of traditional rubber rollers are insufficient. During the rubber roller spinning process, the drafting rubber rollers are prone to swelling, winding, tearing damage and other adverse phenomena, which leads to a significant increase in equipment loss and affects the spinning efficiency.

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

[0005] In view of the deficiencies in the prior art, the invention discloses a rubber roller for environmentally friendly regenerated fibers.

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

[0007] A rubber roller for environmentally friendly recycled fiber, comprising an aluminum liner, a coating layer and an inner layer, wherein the coating layer is arranged on the outer side surface of the aluminum liner, and the inner layer is arranged on the inner wall surface of the aluminum liner, and is characterized in that the coating layer and the inner layer include components counted by weight: 100 parts of nitrile composite rubber, 6 to 8 parts of wear-resistant toughening material, 2 to 3 parts of surface self-lubricant, 3 to 4.5 parts of impact modifier, 5 to 7 parts of white carbon black; 1.4 to 1.9 parts of accelerator; 10 to 12 parts of plasticizer; 1 to 2.0 parts of antioxidant; 5 to 6 parts of sulfur; 6 parts of zinc oxide; 0.5 to 1.5 parts of auxiliary vulcanizing agent.

[0008] Furthermore, the nitrile composite rubber includes nitrile rubber and carboxyl nitrile rubber, and the ratio of the nitrile rubber to the carboxyl nitrile rubber is in the range of 65-80 parts: 20-35 parts.

[0009] Furthermore, the raw Mooney viscosity ML (1+4) of the nitrile rubber at 100° C. ranges from 50 to 57 MU.

[0010] Furthermore, the raw Mooney viscosity ML(1+4) of the carboxylated nitrile rubber ranges from 38 to 43 MU at 100 °C, and the weight percentage of acrylonitrile units in the carboxylated nitrile rubber is 27%.

[0011] Furthermore, the wear-resistant and toughening material is MBS.

[0012] Furthermore, the surface self-lubricant is L-1000.

[0013] Furthermore, the impact modifier is LLDPE.

[0014] Furthermore, the accelerator is TMTM.

[0015] Furthermore, the plasticizer includes TP-759 and DOP, the antioxidant includes KY405 and ODA, and the auxiliary vulcanizing agent is stearic acid.

[0016] A manufacturing method of a rubber roller for environmentally friendly recycled fibers includes the following steps:

[0017] Step S1, material taking, weighing raw materials according to the designed weight parts;

[0018] Step S2, blending, putting the raw materials into a closed rubber mixer, controlling the mixing temperature at 110-115 °C, the rotation speed at 26-32 revolutions per minute, and the mixing time at 300-340 seconds;

[0019] Step S3, thermoplastic, heating up to 170-175 °C, controlling the rotation speed at 30-36 revolutions per minute, and the mixing time at 520-570 seconds;

[0020] Step S4, mixing, controlling the mixing temperature at 125-130 °C, the rotation speed at 24-28 revolutions per minute, and the mixing time at 400-420 seconds, and finally making a rubber product.

[0021] The beneficial effects of the present invention are as follows:

[0022] 1. The nitrile rubber and the carboxylated nitrile rubber are polymerized from butadiene and acrylonitrile monomers. The molecular chain has a certain flexibility and good elasticity. Moreover, the carboxylated nitrile rubber introduces a carboxyl (-COOH) group. The presence of the carboxyl group increases the polarity and activity of the molecular chain, enabling more hydrogen bonds and other interactions to form between the molecular chains. When mixed with nitrile rubber, the molecular chains of the two interpenetrate. The flexible chain segments provided by the nitrile rubber and the hydrogen bond action of the carboxylated nitrile rubber cooperate with each other. The two are mixed in a specific ratio, which helps to form a more uniform and stable cross-linked network in the resin system, enabling the rubber to transmit stress more evenly when stressed, and the molecular chains to stretch and recover reversibly more effectively, thereby improving the elasticity and toughness of the rubber.

[0023] 2. The Mooney viscosity within this range indicates that the molecular chains of nitrile rubber have appropriate cohesive energy and flexibility. When the viscosity is low, the molecular chains are prone to sliding and the elastic recovery force is insufficient; when the viscosity is too high, the molecular chain movement is difficult and the elasticity will also be affected. Similarly, the relatively low Mooney viscosity makes the molecular chains of carboxylated nitrile rubber have better mobility. After mixing with nitrile rubber, it can be inserted between the molecular chains of nitrile rubber, reducing the intermolecular interaction force, making the overall molecular chains easier to move when stressed, improving the elasticity of the rubber, and consuming more energy through the stretching, curling and other movement forms of the molecular chains, thereby further improving the toughness of the rubber, so that the rubber can still maintain good integrity when subjected to greater external forces.

[0024] 3. The methyl methacrylate (MMA) unit in MBS has good compatibility with the polar groups in the resin material, and can act as a compatibilizer to improve the interfacial bonding force between nitrile rubber and carboxylated nitrile rubber and between them and other additives, avoiding problems such as phase separation and interfacial debonding, and further improving the overall toughness and elasticity of the material.

[0025] 4. The self-lubricant L-1000 is oriented in the resin system, and the long-chain alkyl groups in its molecules form a sliding interface layer. This interface layer can make the sliding between the contact surfaces smoother, thereby significantly reducing the friction coefficient, reducing friction loss, and improving the stability of the resin system.

[0026] 5. TMTM can play the role of a bridge and link between the rubber molecular chains, guiding the rubber molecular chains to crosslink according to certain rules, making the distribution of crosslinking points more uniform, and forming a more regular and stable crosslinking network.

[0027] 6. TMTM can decompose to generate active free radicals or ions during the reaction process. These active species can react with the active sites such as double bonds on the rubber molecular chains, initiate a chain reaction, accelerate the crosslinking reaction between the rubber molecular chains, and improve the stability of the resin structure.

[0028] 7. During the aging process of the resin material, when factors such as heat and oxygen trigger the generation of free radicals in the rubber molecular chains, the antioxidant can react with the free radicals through the active hydrogen in the antioxidant, capture the free radicals and convert them into stable compounds, thereby interrupting the free radical chain reaction and preventing the further oxidative degradation of the rubber molecular chains, maintaining the performance stability of the material.

[0029] 8. LLDPE has good compatibility with the nitrile rubber system and can be evenly distributed in the resin continuous phase. When the material is subjected to external forces, these dispersed LLDPE phases can initiate the formation of crazes and shear bands to prevent the crack propagation, thereby significantly improving the toughness of the material.

[0030] 9. During the rubber blending process, strictly controlling the temperature window avoids premature vulcanization or degradation of the rubber raw materials due to excessive temperature, and prevents the raw materials from not being fully softened at too low a temperature, resulting in uneven mixing. During the thermoplastic process, strictly controlling the temperature window and giving an appropriate time provides sufficient energy on the one hand, allowing the additives to interact more deeply with the rubber molecular chains, promoting the full dispersion and fusion of the additives in the rubber. During the mixing process, reducing the temperature helps to further refine the compounding agent particles in the rubber and strengthen the interaction between the rubber molecular chains and the additive molecules. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic structural diagram of a rubber roller for environmentally friendly recycled fibers.

[0032] Figure 2 It is a schematic diagram of the manufacturing method steps of a rubber roller for environmentally friendly recycled fibers.

[0033] In the figure, 1. Aluminum liner; 2. Coating layer; 3. Inner layer. DETAILED DESCRIPTION OF THE INVENTION

[0034] The following will describe the specific embodiments of the present invention with reference to the accompanying drawings.

[0035] Example 1:

[0036] A rubber roller for environmentally friendly recycled fibers, as Figure 1 shown, includes an aluminum liner 1, a coating layer 2 and an inner layer 3. The coating layer 2 is arranged on the outer side surface of the aluminum liner 1, and the inner layer 3 is arranged on the inner wall surface of the aluminum liner 1.

[0037] Among them, the coating layer and the inner layer include components counted by weight: nitrile rubber 3445, 65 parts; carboxylated nitrile rubber, 35 parts; wear-resistant toughening material MBS, 8 parts; surface self-lubricant L-1000, 2 parts; impact modifier LLDPE, 4 parts; auxiliary vulcanizing agent stearic acid, 1.5 parts; silica KH-2, 6 parts; accelerator TMTM, 1.4 parts; antioxidant KY405, 1 part; antioxidant ODA, 0.5 part; sulfur, 5 parts; zinc oxide, 6 parts; plasticizer TP759, 8 parts; plasticizer DOP, 2 parts.

[0038] Its manufacturing method, as Figure 2 shown, includes the following steps:

[0039] Step S1. Take materials and weigh the raw materials according to the designed weight parts.

[0040] Step S2. Blend the rubber. Put the raw materials into a closed rubber mixer, control the mixing temperature at 110 °C, the rotation speed at 26 revolutions per minute, and the mixing time at 300 seconds.

[0041] Step S3: Thermoplastic molding. Heat up to 170°C, control the rotation speed at 30 revolutions per minute, and control the mixing time at 520 seconds.

[0042] Step S4: Kneading. Control the kneading temperature at 125°C, control the rotation speed at 25 revolutions per minute, control the mixing time at 400 seconds, and finally produce a rubber product.

[0043] Finally, the obtained rubber product is processed into a rubber roller for environmentally friendly recycled fibers.

[0044] Example 2:

[0045] The difference from Example 1 is as follows:

[0046] The coating layer and the inner layer include components by weight: acrylonitrile-butadiene rubber 3445, 70 parts; carboxylated acrylonitrile-butadiene rubber, 30 parts; wear-resistant and toughening material MBS, 7 parts; surface self-lubricant L-1000, 3 parts; impact modifier LLDPE, 4.5 parts; auxiliary vulcanizing agent stearic acid, 1.0 part; silica KH-2, 7 parts; accelerator TMTM, 1.6 parts; antioxidant KY405, 1.5 parts; antioxidant ODA, 0.5 part; sulfur, 6 parts; zinc oxide, 6 parts; plasticizer TP759, 9 parts; plasticizer DOP, 2 parts.

[0047] Example 3:

[0048] The difference from Example 1 is as follows:

[0049] The coating layer and the inner layer include components by weight: acrylonitrile-butadiene rubber 3445, 75 parts; carboxylated acrylonitrile-butadiene rubber, 25 parts; wear-resistant and toughening material MBS, 6 parts; surface self-lubricant L-1000, 2 parts; impact modifier LLDPE, 3.5 parts; auxiliary vulcanizing agent stearic acid, 1.0 part; silica KH-2, 7 parts; accelerator TMTM, 1.8 parts; antioxidant KY405, 1.5 parts; antioxidant ODA, 0.5 part; sulfur, 6 parts; zinc oxide, 6 parts; plasticizer TP759, 10 parts; plasticizer DOP, 2 parts.

[0050] Example 4:

[0051] Example 4 uses the same formula as Example 1. The difference between Example 4 and Example 1 is as follows:

[0052] The manufacturing method of the rubber roller for environmentally friendly recycled fibers includes the following steps:

[0053] Step S1: Material taking. Weigh the raw materials according to the designed weight parts.

[0054] Step S2: Blending. Put the raw materials into a closed rubber kneader, control the mixing temperature at 100°C, control the rotation speed at 26 revolutions per minute, and control the mixing time at 300 seconds.

[0055] Step S3: Thermoplastic molding. Heat up to 170 °C, control the rotation speed at 30 revolutions per minute, and control the mixing time for 520 seconds.

[0056] Step S4: Kneading. Control the kneading temperature at 125 °C, control the rotation speed at 25 revolutions per minute, control the mixing time for 400 seconds, and finally produce a rubber product.

[0057] Example 5:

[0058] Example 5 and Example 1 adopt the same formula. The differences between Example 5 and Example 1 are as follows:

[0059] A manufacturing method for a rubber roller using environmentally friendly recycled fibers, comprising the following steps:

[0060] Step S1: Material taking. Weigh the raw materials according to the designed weight portions.

[0061] Step S2: Blending. Put the raw materials into a closed rubber mixer, control the mixing temperature at 113 °C, control the rotation speed at 30 revolutions per minute, and control the mixing time for 310 seconds.

[0062] Step S3: Thermoplastic molding. Heat up to 174 °C, control the rotation speed at 35 revolutions per minute, and control the mixing time for 550 seconds.

[0063] Step S4: Kneading. Control the kneading temperature at 125 °C, control the rotation speed at 25 revolutions per minute, control the mixing time for 410 seconds, and finally produce a rubber product.

[0064] Example 6:

[0065] Example 6 and Example 1 adopt the same formula. The differences between Example 6 and Example 1 are as follows:

[0066] A manufacturing method for a rubber roller using environmentally friendly recycled fibers, comprising the following steps:

[0067] Step S1: Material taking. Weigh the raw materials according to the designed weight portions.

[0068] Step S2: Blending. Put the raw materials into a closed rubber mixer, control the mixing temperature at 115 °C, control the rotation speed at 32 revolutions per minute, and control the mixing time for 340 seconds.

[0069] Step S3: Thermoplastic molding. Heat up to 175 °C, control the rotation speed at 36 revolutions per minute, and control the mixing time for 570 seconds.

[0070] Step S4: Kneading. Control the kneading temperature at 130 °C, control the rotation speed at 28 revolutions per minute, control the mixing time for 420 seconds, and finally produce a rubber product.

[0071] Product performance testing:

[0072] Testing group: Samples were randomly selected from the rubber products prepared in Examples 1 to 6 for testing.

[0073] Testing standards: 《GB / T531.1 - 2008》, 《GB / T528 - 2009》, 《GB / T1689 - 2014》, 《GB / T7759.1 - 2015》.

[0074] Testing results: See Table 2 for details.

[0075] Table 2

[0076]

[0077] Analysis of testing results:

[0078] Hardness: The hardness of the sample is around 69, which is close to the standard.

[0079] Tensile strength: The tensile strength of the sample is around 9.6 Mpa, with an increase of nearly 75% compared to the standard.

[0080] Elongation at break: The elongation at break of the sample is around 265%, with an increase of nearly 77% compared to the standard.

[0081] Permanent set at break: The permanent set at break of the sample is 3%, nearly 100% compared to the standard.

[0082] Abrasion: The abrasion of the sample is about 0.4 (1.61 Km / cm3), with a decrease of nearly 150% compared to the standard.

[0083] Compression set: The compression set of the sample is around 0.7, with a decrease of nearly 114% compared to the standard.

[0084] In summary, on the premise of ensuring that the hardness meets the requirements, the rubber product has good toughness, elasticity and structural stability, which indicates that a stable cross - linked network is formed at the microscopic level.

[0085] Testing group: The rubber products obtained in Examples 1 to 3 were processed into drafting rollers.

[0086] Testing standard: 《GB / T1681 - 2009》.

[0087] Testing results: See Table 3 for details.

[0088] Table 3

[0089]

[0090] Analysis of testing results:

[0091] Impact elasticity: The impact elasticity of the drafting roller is around 30%, with an increase of nearly 50% compared to the standard.

[0092] Coefficient of friction: The coefficient of friction of the rubber roller is about 1.10, which is nearly 36% lower than the standard.

[0093] Regrinding cycle: The regrinding cycle of the rubber roller is about 60 days, which is nearly 33% higher than the standard.

[0094] Damage rate: The damage rate of the rubber roller is about 0.9, which is nearly 56% lower than the standard.

[0095] In summary, the technical indicators fully meet the performance requirements for the rubber roller to be used on spinning machines, effectively meet the technical requirements of modern textile new processes, and the service life is improved through on-site spinning tests.

[0096] 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.

[0097] 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 still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. An environmentally friendly recycled fiber rubber roller, comprising an aluminum liner, a coating layer and an inner layer, wherein the coating layer is arranged on the outer surface of the aluminum liner, and the inner layer is arranged on the inner wall surface of the aluminum liner, characterized in that: The coating layer and the inner layer include the following components counted by weight: 100 parts of nitrile composite rubber, 6 to 8 parts of wear-resistant toughening material, 2 to 3 parts of surface self-lubricant, 3 to 4.5 parts of impact modifier, 5 to 7 parts of white carbon black; 1.4 to 1.9 parts of accelerator; 10 to 12 parts of plasticizer; 1 to 2.0 parts of antioxidant; 5 to 6 parts of sulfur; 6 parts of zinc oxide; and 0.5 to 1.5 parts of auxiliary vulcanizing agent.

2. The environmentally friendly recycled fiber rubber roller according to claim 1, characterized in that: The nitrile composite rubber comprises nitrile rubber and carboxyl nitrile rubber, and the ratio of the nitrile rubber to the carboxyl nitrile rubber is in the range of 65-80 parts: 20-35 parts.

3. The environmentally friendly recycled fiber rubber roller according to claim 2, characterized in that: The raw Mooney viscosity ML (1+4) of the nitrile rubber at 100° C. ranges from 50 to 57 MU.

4. The environmentally friendly recycled fiber rubber roller according to claim 2, characterized in that: The raw rubber Mooney viscosity ML (1+4) of the carboxylated nitrile rubber at 100° C. ranges from 38 to 43MU, and the weight percentage of acrylonitrile units in the carboxylated nitrile rubber is 27%.

5. The environmentally friendly rubber roller for regenerated fiber according to claim 1, characterized in that: The wear-resistant toughening material is MBS.

6. The environmentally friendly rubber roller for regenerated fiber according to claim 1, characterized in that: The surface self-lubricant is L-1000.

7. The environmentally friendly rubber roller for regenerated fiber according to claim 1, characterized in that: The impact modifier is LLDPE.

8. The environmentally friendly rubber roller for regenerated fiber according to claim 1, characterized in that: The accelerator is TMTM.

9. The environmentally friendly rubber roller for regenerated fiber according to claim 1, characterized in that: The plasticizer includes TP-759 and DOP, the antioxidant includes KY405 and ODA, and the auxiliary vulcanizing agent is stearic acid.

10. A method for manufacturing an environmentally friendly recycled fiber rubber roller according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step S1, taking materials, weighing raw materials according to the designed weight; Step S2, mixing rubber, putting the raw materials into a closed rubber mixer, controlling the mixing temperature at 110-115° C., the rotation speed at 26-32 rpm, and the mixing time at 300-340 seconds; Step S3, thermoplastic, heating to 170-175°C, rotating speed controlled at 30-36 rpm, mixing time controlled at 520-570 seconds; Step S4, mixing, the mixing temperature is controlled at 125-130° C., the rotation speed is controlled at 24-28 rpm, the mixing time is controlled at 400-420 seconds, and finally a rubber product is manufactured.

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