A multi-tread new process pneumatic tire and a preparation process thereof

Abstract

The application relates to the tire manufacturing technical field and discloses a multi-tread new-process pneumatic tire and a preparation process thereof, which comprises the following component materials: 8-19 parts of silica rubber, 6-17 parts of butadiene-acrylonitrile rubber, 12-28 parts of base rubber, 1-4 parts of adhesive rubber sheet, 4-18 parts of cross-linking agent, 2-8 parts of filler A, 2-8 parts of filler B, 3-7 parts of filler C, 4-8 parts of adhesive, and 1-10 parts of adhesive aid. Through the multi-tread process, the improved multi-tread pneumatic tire shows better wear resistance, the wear loss is obviously reduced, the tire sample has a longer service life in the use process, and through the cooperation of the silica rubber and the butadiene-acrylonitrile rubber, the improved multi-tread pneumatic tire can increase the tire grip and the anti-skid performance while the wear is controlled, and the multifunctionalization of the tire is realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tire manufacturing technology, in particular to a multi-tread new process pneumatic tire and a preparation process thereof. BACKGROUND

[0002] Pneumatic tire is a common type of vehicle tire, also known as air bag tire. It is made of rubber and other materials, and is filled with air inside to provide support and cushioning effect. The air pressure of pneumatic tire can be adjusted, so it can provide good elasticity and damping effect, reduce the feeling of bumping during driving, and the ground contact area of pneumatic tire can change according to the adjustment of air pressure, which helps to improve the grip of vehicle and increase the stability and traction during driving.

[0003] The balance between grip and wear resistance of traditional pneumatic tire reflects a challenge in design; grip refers to the friction between tire and ground, which is crucial for providing good traction and handling; improving grip usually requires increasing the adhesion and ground contact area of the tread, which may lead to rapid wear of the tread material, thus reducing the wear resistance of the tire; therefore, when designing the tire, a balance needs to be struck between grip and wear resistance to meet the needs of different road conditions and use conditions; in addition, the requirement for anti-skid performance is also increasing; anti-skid performance refers to the ability of a vehicle to maintain stability and avoid skidding when making sharp turns or suddenly changing lanes; traditional tires may have limitations in this regard, as improving anti-skid performance usually requires adjustments to the tread design and carcass structure, which may affect the performance of the tire in other aspects; the existing technology has some deficiencies in multifunctionalization, and cannot well realize the comprehensive improvement of grip, wear resistance and anti-skid performance at the same time; because there is a mutual restraining relationship between the three performances, improving one performance often affects the other performances; therefore, designing a tire that can balance and improve the three performances is a challenging engineering problem. SUMMARY

[0004] In view of the deficiencies of the prior art, the present application provides a multi-tread new process pneumatic tire and a preparation process thereof, which solves the problem that grip, wear resistance and anti-skid performance cannot be improved simultaneously.

[0005] To achieve the above purpose, the present application is implemented by the following technical scheme: a multi-tread new process pneumatic tire and a preparation process thereof, comprising the following component materials: 8-19 parts of silicone rubber, 6-17 parts of nitrile rubber, 12-28 parts of base glue, 1-4 parts of adhesive film, 4-18 parts of crosslinking agent, 2-8 parts of filler A, 2-8 parts of filler B, 3-7 parts of filler C, 4-8 parts of adhesive, 1-10 parts of adhesion aid.

[0006] Preferably, the silica rubber comprises silica and silane, the silica and silane are added in a ratio of 1:3, the filler A comprises silica and carbon black, the silica and carbon black are added in a ratio of 3:5, the nitrile rubber comprises acrylonitrile and butadiene, the acrylonitrile and butadiene are added in a ratio of 3:5, the filler B comprises carbon black and white carbon black, the carbon black and white carbon black are added in a ratio of 2:1.

[0007] Preferably, the base glue comprises epoxy resin and polyimide, the epoxy resin and polyimide are added in a ratio of 3:5, the filler C comprises glass fiber and silica gel, the glass fiber and silica gel are added in a ratio of 1:2, the adhesive film comprises polyester film and polyamide film, the polyester film and polyamide film are added in a ratio of 1:3.

[0008] Preferably, the adhesive comprises epoxy resin, acrylate and polyurethane, the epoxy resin, acrylate and polyurethane are added in a ratio of 2:3:1, the adhesion aid comprises active agent and plasticizer, the active agent and plasticizer are added in a ratio of 1:1, the crosslinking agent comprises mercaptan and sulfate, the mercaptan and sulfate are added in a ratio of 1:2.

[0009] Preferably, the method comprises the following steps:

[0010] S1, preparing materials: silica rubber, nitrile rubber, base glue, adhesive film, crosslinking agent, filler A, filler B, filler C, crosslinking agent, adhesive, adhesion aid;

[0011] S2, tread preparation: pour the silica rubber, 35% crosslinking agent and filler A into a mixer, stir and mix for 14-18 minutes to obtain a first tread rubber, then pour the nitrile rubber, 35% crosslinking agent and filler B into the mixer, stir and mix for 12-19 minutes to obtain a second tread rubber, and then pour the base glue, 30% crosslinking agent, adhesive and filler C into the mixer, stir and mix for 17-28 minutes to obtain a composite A;

[0012] S3, hot pressing: pour the first tread rubber into a mold, then pour the second tread rubber into the mold, and finally pour the composite A into the mold, then place the mold into a vulcanizing machine and heat for 38-57 minutes, and then take out the mold and place it in a cooling rack for 30-51 minutes;

[0013] S4, material adhesion: place the adhesive film into the mold, then add the adhesion aid, and finally send it into a hot press for hot pressing for 44-51 minutes to obtain a multi-tread tire;

[0014] S5, post-processing: demold the multi-tread tire and use a grinding machine to beautify the surface.

[0015] Preferably, in the S2 step, the speed of the mixer is 35rpm-40rpm and the temperature is 104℃-119℃ when stirring the silica gel rubber, 35% crosslinking agent and filler A.

[0016] Preferably, in the S2 step, the speed of the mixer is 41rpm-47rpm and the temperature is 122℃-138℃ when stirring the silica gel rubber, 35% crosslinking agent and filler A.

[0017] Preferably, in the S2 step, the speed of the mixer is 51rpm-60rpm and the temperature is 144℃-149℃ when stirring the silica gel rubber, 35% crosslinking agent and filler A.

[0018] Preferably, in the S3 step, the internal temperature of the vulcanizing machine is 144℃-149℃, and in the S4 step, the internal temperature of the hot press is 110℃-137℃.

[0019] Preferably, in the S5 step, the speed of the grinder is 100rpm-130rpm and the operation time is 7min-12min.

[0020] The present application provides a multi-tread new process pneumatic tire and a preparation process thereof. The present application has the following beneficial effects:

[0021] 1. The multi-tread process improves the wear resistance of the improved multi-tread pneumatic tire, significantly reduces the wear amount, and shows a longer service life of the tire sample during use. The improved multi-tread pneumatic tire can increase the tire grip and anti-skid performance while controlling wear, thereby realizing the multifunctionalization of the tire. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 The process flow chart of the present application is shown in the figure. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described in detail below with reference to the drawings in the specification of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0024] Embodiment:

[0025] Embodiment 1: Preparation process of multi-tread new process pneumatic tire with enhanced grip

[0026] Step:

[0027] S1, Prepare materials: silicone rubber, nitrile rubber, base glue, adhesive film, crosslinking agent, filler A, filler B, filler C, crosslinking agent, adhesive, adhesion aid;

[0028] S2, Tread preparation:

[0029] a. Pour the silicone rubber, 35% crosslinking agent, and filler A into the mixer, stir and mix at a speed of 35 rpm and a temperature of 104°C for 14 minutes to obtain the first tread rubber;

[0030] b. Pour the nitrile rubber, 35% crosslinking agent, and filler B into the mixer, stir and mix at a speed of 41 rpm and a temperature of 122°C for 12 minutes to obtain the second tread rubber;

[0031] S3, Hot forming:

[0032] a. Pour the first tread rubber into the mold;

[0033] b. Pour the second tread rubber into the mold;

[0034] c. Pour the base glue, 30% crosslinking agent, adhesive, and filler C into the mixer and stir and mix for 17 minutes to obtain compound A;

[0035] d. Pour compound A into the mold;

[0036] e. Place the mold in the vulcanizing machine and heat to 144°C for 38 minutes;

[0037] f. Take out the mold and place it in the cooling rack for 30 minutes;

[0038] S4, Material bonding:

[0039] a. Place the adhesive film in the mold;

[0040] b. Add adhesion aid;

[0041] c. Place the mold in the hot press and heat for 44 minutes;

[0042] S5, Post-processing:

[0043] a. Perform mold demolding;

[0044] b. Use a grinder to beautify the surface of the tire at a speed of 100 rpm for 7 minutes;

[0045] Summary: The ratio of silicone rubber, filler A, and filler B makes the tread rubber have better grip performance, and the hot forming and material bonding steps in the preparation process ensure the structural strength and bonding quality of the tread.

[0046] Example 2: Preparation process of multi-tread new process pneumatic tire for enhancing wear resistance

[0047] Steps:

[0048] S1, Prepare materials: silicone rubber, nitrile rubber, base glue, adhesive film, crosslinking agent, filler A, filler B, filler C, crosslinking agent, adhesive, adhesion aid;

[0049] S2, Tread preparation:

[0050] a. Pour silicone rubber, 35% crosslinking agent, and filler A into a mixer, stir and mix at a speed of 35 rpm and a temperature of 104°C for 14 minutes to obtain a first tread rubber;

[0051] b. Pour nitrile rubber, 35% crosslinking agent, and filler B into a mixer, stir and mix at a speed of 41 rpm and a temperature of 122°C for 12 minutes to obtain a second tread rubber;

[0052] S3, Hot pressing:

[0053] a. Pour the first tread rubber into the mold;

[0054] b. Pour the second tread rubber into the mold;

[0055] c. Pour the base glue, 30% crosslinking agent, adhesive, and filler C into the mixer and stir and mix for 17 minutes to obtain a compound A;

[0056] d. Pour compound A into the mold;

[0057] e. Place the mold into a vulcanizing machine and heat to 144°C for 38 minutes;

[0058] f. Take out the mold and place it in a cooling rack for 30 minutes;

[0059] S4, Material bonding:

[0060] a. Place the adhesive film into the mold;

[0061] b. Add adhesion aid;

[0062] c. Place the mold into a hot press and heat press for 44 minutes;

[0063] S5, Post-processing:

[0064] a. Perform mold demolding;

[0065] b. Use a grinder to beautify the surface of the tire at a speed of 100 rpm for 7 minutes;

[0066] Summary: The ratio of filler A and nitrile rubber, filler B is adjusted so that the tread rubber has better wear resistance, and the hot pressing and material bonding steps in the preparation process ensure the structural strength and bonding quality of the tread.

[0067] Example 3: Overall optimized multi-tread new process pneumatic tire preparation process

[0068] Steps:

[0069] S1, prepare materials: silicone rubber, nitrile rubber, base glue, adhesive film, crosslinking agent, filler A, filler B, filler C, crosslinking agent, adhesive, adhesion aid;

[0070] S2, tread preparation:

[0071] a. Pour silicone rubber, 35% crosslinking agent, filler A into the mixer, stir and mix at a speed of 40 rpm and a temperature of 119°C for 16 minutes to get the first tread rubber;

[0072] b. Pour nitrile rubber, 35% crosslinking agent, filler B into the mixer, stir and mix at a speed of 47 rpm and a temperature of 138°C for 15 minutes to get the second tread rubber;

[0073] S3, hot pressing:

[0074] a. Pour the first tread rubber into the mold;

[0075] b. Pour the second tread rubber into the mold;

[0076] c. Pour the base glue, 28% crosslinking agent, adhesive, filler C into the mixer and stir and mix for 28 minutes to get compound A;

[0077] d. Pour compound A into the mold;

[0078] e. Put the mold into the vulcanizing machine and heat to 149°C for 57 minutes;

[0079] f. Take out the mold and put it into the cooling rack for 51 minutes;

[0080] S4, material bonding:

[0081] a. Put the adhesive film into the mold;

[0082] b. Add adhesion aid;

[0083] c. Put the mold into the hot press and hot press for 51 minutes;

[0084] S5, post-processing:

[0085] a. Perform mold demolding;

[0086] b. Use a grinder to beautify the surface of the tire, the speed is 130 rpm, the operation time is 12 minutes;

[0087] Summary: By optimizing the material ratio, adjusting the mixer parameters and controlling the temperature of the vulcanizing machine and the hot press, the uniformity, structural strength and adhesion quality of the tire tread are ensured.

[0088] Summary: According to the preparation process of the multi-tread pneumatic tire, by optimizing the material ratio, adjusting the mixer parameters, controlling the temperature of the vulcanizing machine and the hot press, and the post-processing steps, the tire grip and wear resistance can be enhanced. Different embodiments highlight different features in the scheme, including enhancing grip, enhancing wear resistance, and overall optimization.

[0089] Design comparison experiment:

[0090] Comparison experiment one: wear resistance comparison experiment

[0091] Prior art scheme:

[0092] S1, material preparation: 17 parts of silicone rubber, 28 parts of base glue, 4 parts of adhesive film, 8 parts of filler B, 8 parts of adhesive, and 18 parts of crosslinking agent.

[0093] S2, mixing: Put the above materials into the rubber mixing machine according to the formula ratio to ensure that the materials are fully and uniformly mixed.

[0094] S3, molding: Put the mixed rubber into the tire molding mold for molding processing to form a tire sample.

[0095] S4, vulcanization: Put the molded tire sample into the vulcanizing machine for vulcanization treatment to ensure that the physical properties of the rubber are fully developed.

[0096] S5, wear resistance test: Use a wear tester to test the wear resistance of the prepared tire sample and record the wear data.

[0097] Improved technical scheme:

[0098] Material preparation: 12 parts of silicone rubber, 14 parts of nitrile rubber, 25 parts of base glue, 2 parts of adhesive film, 6 parts of filler B, 6 parts of adhesive, and 12 parts of crosslinking agent.

[0099] Mixing: Put the above materials into the rubber mixing machine according to the new formula ratio to ensure that the materials are fully and uniformly mixed.

[0100] Molding: Put the mixed rubber into the tire molding mold for molding processing to form an improved tire sample.

[0101] Vulcanization: After the tire sample is formed, it is placed in a vulcanizing machine for vulcanization treatment to ensure that the physical properties of the new material are fully utilized.

[0102] Wear resistance test: The improved tire sample is tested for wear resistance using a wear tester, and the wear data is recorded.

[0103] Experimental data table:

[0104] Experimental group Prior art wear (mm 3 ) Improved technology wear (mm 3 )]]> Experiment 1 1000 800 Experiment 2 1200 900 Experiment 3 1100 820

[0105] Comparative experiment two: grip force comparison experiment

[0106] Prior art preparation process:

[0107] Material preparation: 17 parts of nitrile rubber, 28 parts of base glue, 4 parts of adhesive film, 8 parts of filler, 8 parts of adhesive, and 18 parts of crosslinking agent.

[0108] Mixing: Put the rubber materials, fillers, and friction agents into the rubber mixing machine according to the formula ratio to ensure that the materials are fully and uniformly mixed.

[0109] Forming: Put the mixed rubber into the tire forming mold to form the tire sample.

[0110] Vulcanization: After the tire sample is formed, it is placed in a vulcanizing machine for vulcanization treatment to ensure that the physical properties of the rubber are fully utilized.

[0111] Friction coefficient test: The prepared tire sample is tested for friction coefficient using a friction coefficient tester, and the friction coefficient data is recorded.

[0112] Improved technical solution preparation process:

[0113] Material preparation: 12 parts of silicone rubber, 14 parts of nitrile rubber, 25 parts of base glue, 2 parts of adhesive film, 6 parts of filler, 6 parts of adhesive, and 12 parts of crosslinking agent.

[0114] Mixing: Put the new materials into the rubber mixing machine according to the formula ratio to ensure that the materials are fully and uniformly mixed.

[0115] Forming: Put the mixed rubber into the tire forming mold to form the improved tire sample.

[0116] Vulcanization: After the tire sample is formed, it is placed in a vulcanizing machine for vulcanization treatment to ensure that the physical properties of the new material are fully utilized.

[0117] Friction coefficient test: The improved tire sample is tested for friction coefficient using a friction coefficient tester, and the friction coefficient data is recorded.

[0118] Table of experimental data:

[0119] Experimental group Prior art friction coefficient Improved technology friction coefficient Experiment 1 0.85 0.88 Experiment 2 0.82 0.87 Experiment 3 0.86 0.89

[0120] Comparative Experiment Three: Anti-skid performance comparison experiment

[0121] Prior art solution:

[0122] Material preparation: 15 parts of silicone rubber, 12 parts of nitrile rubber, 25 parts of base glue, 2 parts of adhesive film, 10 parts of crosslinking agent, 5 parts of filler A, 5 parts of filler B, 4 parts of filler C, 6 parts of adhesive, 3 parts of adhesion aid.

[0123] Mixing: Put various rubbers and other additives into the mixing machine, mix according to the formula proportion, and ensure that various materials are fully mixed and uniform.

[0124] Molding: Put the mixed rubber compound into the mold, and shape it into the shape of a multi-tread pneumatic tire sample.

[0125] Vulcanization: Put the molded tire sample into the vulcanization machine for vulcanization treatment to ensure that the tire sample has the required strength and elasticity.

[0126] Post-processing: Post-processing of the vulcanized tire sample, including edge trimming, cleaning and other process steps to ensure the appearance and quality of the sample.

[0127] Improved technical solution:

[0128] Material preparation: 12 parts of silicone rubber, 15 parts of nitrile rubber, 22 parts of base glue, 3 parts of adhesive film, 15 parts of crosslinking agent, 6 parts of filler A, 4 parts of filler B, 3 parts of filler C, 7 parts of adhesive, 2 parts of adhesion aid.

[0129] Mixing: Put the new formula materials into the mixing machine, mix according to the new formula proportion, and ensure that the new materials are mixed uniformly.

[0130] Molding: Put the mixed rubber compound into the mold, and shape it into the shape of a multi-tread pneumatic tire sample.

[0131] Vulcanization: Put the new formula tire sample into the vulcanization machine for vulcanization treatment to ensure that the sample has the required performance.

[0132] Post-processing: Post-processing of the vulcanized tire sample of the new formula, including edge trimming, cleaning and other process steps to ensure that the sample meets the requirements

[0133] Table of experimental data:

[0134]

[0135]

[0136] In summary, the improved technical solution performs better than the prior art in terms of wear resistance, the wear amount is significantly reduced, showing that the improved material formula and preparation process play a positive role in improving the wear resistance of the tire sample. At the same time, the improved technical solution performs better than the prior art in terms of grip, the friction coefficient is improved, which shows that the improved material formula and preparation process help to improve the grip of the tire sample

[0137] Although embodiments of the present application have been shown and described, it is to be understood that various modifications, substitutions, replacements and changes can be made to these embodiments without departing from the principles and spirit of the present application, the scope of the present application being defined by the appended claims and their equivalents.

Claims

1. A process for the production of a multi-tread, new technology pneumatic tire, characterized in that, It comprises the following steps: S1, preparing materials: silicone rubber, nitrile rubber, base glue, adhesive film, crosslinking agent, filler A, filler B, filler C, adhesive, adhesion aid; S2, tread preparation: pour silicone rubber, 35% crosslinking agent, filler A into the mixer, stir and mix for 14-18 minutes to obtain the first tread rubber, then pour nitrile rubber, 35% crosslinking agent, filler B into the mixer, stir and mix for 12-19 minutes to obtain the second tread rubber, then pour base glue, 30% crosslinking agent, adhesive, filler C into the mixer, stir and mix for 17-28 minutes to obtain compound A; S3, hot pressing: pour the first tread rubber into the mold, then pour the second tread rubber into the mold, and finally pour compound A into the mold, then put the mold into the vulcanizing machine and heat for 38-57 minutes, then take out the mold and put it into the cooling rack for 30-51 minutes; S4, material adhesion: place the adhesive film into the mold, then add the adhesion aid, and finally send it into the hot press for 44-51 minutes to obtain a multi-tread tire; S5, post-processing: demold the multi-tread tire and beautify the surface with a grinding machine; In the S1 step, the proportions of the prepared materials are: Silicone rubber 8-19 parts, nitrile rubber 6-17 parts, base glue 12-28 parts, adhesive film 1-4 parts, crosslinking agent 4-18 parts, filler A 2-8 parts, filler B 2-8 parts, filler C 3-7 parts, adhesive 4-8 parts, adhesion aid 1-10 parts.

2. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, The silicone rubber includes silica and silane, the addition ratio of silica and silane is 1:3, the filler A includes silica and carbon black, the addition ratio of silica and carbon black is 3:5, the nitrile rubber includes acrylonitrile and butadiene, the addition ratio of acrylonitrile and butadiene is 3:5, the filler B includes carbon black and white carbon black, the addition ratio of carbon black and white carbon black is 2:

1.

3. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, The base glue includes epoxy resin and polyimide, the addition ratio of epoxy resin and polyimide is 3:5, the filler C includes glass fiber and silica, the addition ratio of glass fiber and silica is 1:2, the adhesive film includes polyester film and polyamide film, the addition ratio of polyester film and polyamide film is 1:

3.

4. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, The adhesive includes epoxy resin, acrylate and polyurethane, the addition ratio of epoxy resin, acrylate and polyurethane is 2:3:1, the adhesion aid includes active agent and plasticizer, the addition ratio of active agent and plasticizer is 1:1, the crosslinking agent includes mercaptan and sulfate, the addition ratio of mercaptan and sulfate is 1:

2.

5. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, In the S2 step, the stirring speed of the mixer for stirring silicone rubber, 35% crosslinking agent and filler A is 35-40 rpm, and the temperature is 104-119°C.

6. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, In the S2 step, the stirring speed of the mixer for stirring silicone rubber, 35% crosslinking agent and filler A is 41-47 rpm, and the temperature is 122-138°C.

7. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, In the S2 step, the stirring speed of the mixer is 51 rpm to 60 rpm, and the temperature is 144°C to 149°C.

8. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, In the S3 step, the internal temperature of the curing machine is 144°C to 149°C, and in the S4 step, the internal temperature of the hot press is 110°C to 137°C.

9. A process for the preparation of a multi-tread new technology pneumatic tire according to claim 1, characterized in that, In the S5 step, the speed of the grinder is 100 rpm to 130 rpm, and the operation time is 7 min to 12 min.

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