CN116120643A - Puncture-resistant low-split underground engineering tire sidewall composition and preparation method thereof - Google Patents
Puncture-resistant low-split underground engineering tire sidewall composition and preparation method thereof Download PDFInfo
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- CN116120643A CN116120643A CN202211729923.1A CN202211729923A CN116120643A CN 116120643 A CN116120643 A CN 116120643A CN 202211729923 A CN202211729923 A CN 202211729923A CN 116120643 A CN116120643 A CN 116120643A
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- 239000000203 mixture Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title abstract description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 34
- 239000005060 rubber Substances 0.000 claims abstract description 34
- 239000006229 carbon black Substances 0.000 claims abstract description 20
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims abstract description 16
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 12
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 10
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000011593 sulfur Substances 0.000 claims abstract description 8
- 229910052717 sulfur Inorganic materials 0.000 claims abstract description 8
- 239000011787 zinc oxide Substances 0.000 claims abstract description 8
- 239000011347 resin Substances 0.000 claims abstract description 7
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 244000043261 Hevea brasiliensis Species 0.000 claims abstract description 6
- 229920003052 natural elastomer Polymers 0.000 claims abstract description 6
- 229920001194 natural rubber Polymers 0.000 claims abstract description 6
- KVBYPTUGEKVEIJ-UHFFFAOYSA-N benzene-1,3-diol;formaldehyde Chemical compound O=C.OC1=CC=CC(O)=C1 KVBYPTUGEKVEIJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims abstract description 4
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 3
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 3
- 230000003712 anti-aging effect Effects 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 239000003607 modifier Substances 0.000 claims abstract description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 3
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000008117 stearic acid Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 22
- 238000003825 pressing Methods 0.000 claims description 21
- 238000007599 discharging Methods 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- 238000000034 method Methods 0.000 claims description 15
- 239000004594 Masterbatch (MB) Substances 0.000 claims description 14
- 229920003051 synthetic elastomer Polymers 0.000 claims description 6
- 239000005061 synthetic rubber Substances 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 230000006378 damage Effects 0.000 abstract description 10
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 208000027418 Wounds and injury Diseases 0.000 abstract description 7
- 208000014674 injury Diseases 0.000 abstract description 7
- 238000005520 cutting process Methods 0.000 abstract description 5
- GHMLBKRAJCXXBS-UHFFFAOYSA-N resorcinol Chemical compound OC1=CC=CC(O)=C1 GHMLBKRAJCXXBS-UHFFFAOYSA-N 0.000 description 6
- 239000003292 glue Substances 0.000 description 5
- 238000005065 mining Methods 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 230000032683 aging Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000035882 stress Effects 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- VKYKSIONXSXAKP-UHFFFAOYSA-N hexamethylenetetramine Chemical compound C1N(C2)CN3CN1CN2C3 VKYKSIONXSXAKP-UHFFFAOYSA-N 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000005062 Polybutadiene Substances 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000012752 auxiliary agent Substances 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000004312 hexamethylene tetramine Substances 0.000 description 1
- 235000010299 hexamethylene tetramine Nutrition 0.000 description 1
- 125000001997 phenyl group Chemical group [H]C1=C([H])C([H])=C(*)C([H])=C1[H] 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000010074 rubber mixing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 125000003011 styrenyl group Chemical group [H]\C(*)=C(/[H])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L7/00—Compositions of natural rubber
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C1/00—Tyres characterised by the chemical composition or the physical arrangement or mixture of the composition
- B60C1/0025—Compositions of the sidewalls
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2296—Oxides; Hydroxides of metals of zinc
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
- Y02T10/86—Optimisation of rolling resistance, e.g. weight reduction
Landscapes
- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Tires In General (AREA)
Abstract
The invention provides an anti-puncture low-split underground engineering tire sidewall composition and a preparation method thereof, wherein the composition comprises the following components: 20.0 to 60.0 portions of end group modified natural rubber; 10.0 to 60.0 portions of star rubber; 1.0 to 40.0 portions of high benzene rubber; 0 to 10.0 parts of liquid regenerated rubber; 30.0 to 60.0 parts of carbon black; 1.0 to 20.0 portions of pre-dispersed granulated white carbon black; 1.0 to 4.0 portions of silane coupling agent; 2.0 to 5.0 portions of superfine zinc oxide; 0.1 to 2.0 portions of functional modifier; 0.5 to 3.0 portions of stearic acid; 1.0 to 5.0 portions of tackifying resin; 0.5 to 5.0 parts of resorcinol formaldehyde resin; 2.0 to 5.0 portions of anti-aging agent; 0.5 to 3.0 parts of accelerator; 0.5 to 3.0 portions of sulfur; 0 to 0.5 portion of scorch retarder. According to the puncture-resistant low-crack underground engineering tire sidewall composition and the preparation method thereof, the purpose that the engineering machinery tire sidewall part is not easily scratched under the condition of not increasing reinforcing ribs is achieved, and the crack growth rate is low after cutting injury is achieved.
Description
Technical Field
The invention belongs to the technical field of tires, and particularly relates to an anti-puncture low-split underground engineering tire sidewall composition and a preparation method thereof.
Background
At the ore cargo loading and unloading point of the engineering tire, the tire often directly drives into an ore pile slag pile, the running and loading are both stressed through the tire transmission, the tire can buffer the impact force received through deformation in the process, after the tire is sunk and deformed, the tire side can bulge, and the tire side is the thinnest position of the tire, so that the tire side is extremely easy to be stabbed by ore slag cutting. Especially, the underground mining has limited mine hole width and ore accumulation on the ground, which is easier to cause the tire side injury, after the side injury extends to the framework material, the water enters the tire framework layer to cause the separation of rubber and the framework material, the tire is damaged and can not be used, the mine hole space is limited, the underground mine hole is difficult to replace the tire, and the mine hole is blocked to influence the transportation work of all mine cars, so mining companies are required to reduce the damage proportion of the side for tire manufacturers,
at present, engineering tire companies generally adopt measures of increasing reinforcing ribs at the side wall positions to reduce the damage ratio of the side wall injuries, circumferential grooves are required to be increased at the side wall positions of tire vulcanization molds by increasing the reinforcing ribs, the grooves are convenient to increase for newly processed molds, the old molds in use are returned to the mold processing factory for grooving, the period is long, the cost is high, normal production of the tires can be influenced, and spare molds are required to be used for returning to the mold processing factory for processing.
The global economy development, the demand for metal is increasingly increased, a certain distance is kept from the ground surface by most metal ores, underground mining is adopted, large ores are transported by engineering machinery vehicles, mine holes are dim in light, and wet water seepage is carried out, so that the engineering machinery vehicles are frequent and serious in damage to tires in the working process, mine hole spaces are limited, walls and piled ores are easy to cut tire sidewalls, the tire sidewalls are the thinnest parts of the tires, the tire sidewalls are damaged to cause air leakage, the normal operation of the engineering vehicles is seriously influenced, the tire replacement in the mine holes is very difficult, and channels can be blocked to influence the operation of other vehicles.
The underground mining tire has the conventional performance requirements of high flexibility, deformation buffering, aging resistance and the like on the sidewall, has special puncture resistance, and ensures the low failure rate of the underground tire to be used for a long time after being damaged by ores due to low ductility of cracks.
Disclosure of Invention
In view of the above, the invention aims to solve the problems that the tire side of the engineering machinery tire is easy to scratch, repeated deformation and bending crack increase to cause air leakage, and the common measures are to add reinforcing ribs at the tire side part. According to the invention, the polymer system of the sidewall composition is regulated, so that the sidewall part of the engineering machinery tire is not easily scratched under the condition of not increasing reinforcing ribs, and the crack growth rate after cutting injury is low.
In order to achieve the above purpose, the technical scheme of the invention is realized as follows:
a puncture resistant low-split downhole engineering tire sidewall composition comprising the following components:
20.0 to 60.0 portions of end group modified natural rubber;
10.0 to 60.0 portions of star rubber;
1.0 to 40.0 portions of high benzene rubber;
0 to 10.0 parts of liquid regenerated rubber;
30.0 to 60.0 parts of carbon black;
1.0 to 20.0 portions of pre-dispersed granulated white carbon black;
1.0 to 4.0 portions of silane coupling agent;
2.0 to 5.0 portions of superfine zinc oxide;
0.1 to 2.0 portions of functional modifier;
0.5 to 3.0 portions of stearic acid;
1.0 to 5.0 portions of tackifying resin;
0.5 to 5.0 parts of resorcinol formaldehyde resin;
2.0 to 5.0 portions of anti-aging agent;
0.5 to 3.0 parts of accelerator;
0.5 to 3.0 portions of sulfur;
0 to 0.5 portion of scorch retarder.
The star rubber is a synthetic rubber with a block reaction star structure.
The pre-dispersed and granulated white carbon black is surface-treated white carbon black.
A method of preparing an anti-puncture low-split-spread downhole engineering tire sidewall composition comprising the steps of:
s1: mixing the master batch on an internal mixer, wherein the mixing process comprises feeding, feeding and pressing the rubber and fine materials, lifting the bolts for a period of time, adding carbon black, pressing the bolts, lifting the bolts again, pressing the bolts again, discharging the rubber at a certain temperature, and discharging rubber materials from an open mill;
s2: the final mixing is carried out on an internal mixer, the mixing process comprises the steps of opening a feed gate, feeding masterbatch and pressing a sulfur fine material, lifting the stopper after a certain time, lifting the stopper again after one end of the pressing stopper, discharging the masterbatch under a certain taste, and discharging the masterbatch from the internal mixer.
The mixing speed of the master batch in the step S1 on an internal mixer is 50 r.min -1 Upper ram pressure 6.5ba; in the step S2, the final mixing is carried out on an internal mixer at a mixing rotating speed of 25 r.min -1 The upper ram pressure was 6.5ba.
And (3) feeding rubber and pressing the fine materials in the step (S1), then carrying out bolt lifting and adding carbon black for 30 seconds, pressing the bolts again, lifting the bolts at the temperature of 125 ℃, pressing the bolts again, discharging rubber at the temperature of 160 ℃, and discharging rubber materials from an open mill.
And in the step S2, a feeding door is opened, masterbatch and sulfur fine materials are fed to be pressed and fastened, 50 seconds of bolt lifting is performed, 100 seconds of bolt lifting is performed, the rubber discharging is performed at the temperature of 100 ℃, and the rubber material of the open mill is fed.
The end group modified natural rubber is imported from Thailand, is subjected to end capping treatment, has stable performance, reduces the re-crosslinking reaction after aging and chain breakage, better maintains the molecular chain performance of the natural rubber, and reduces the performance degradation caused by aging and degradation.
The star rubber is a synthetic rubber with a block reaction star structure, and the combination of multi-component molecular chains makes up the performance defect of single molecular chain synthetic rubber and shows excellent abrasion performance and heat generating performance.
The high-benzene rubber is novel synthetic rubber, improves the average molecular weight through optimizing the accelerator and the reaction temperature, achieves excellent viscoelasticity, enables more benzene ring branched chains to be connected to a macromolecular chain, shows excellent tearing strength, simultaneously has flexible elasticity, ensures the flexibility of a sidewall part, and simultaneously has excellent puncture resistance and low crack extension.
The liquid regenerated rubber can effectively degrade the processing difficulty and energy consumption of the mixing of the rubber materials, reduce the use of oil, improve the uniformity of the side rubber materials and reduce the pollution of pollution and petrochemical energy products.
The pre-dispersion granulating white carbon black is white carbon black subjected to surface treatment, so that the agglomeration of the white carbon black is prevented, the dispersion in rubber is effectively improved, the stress concentration caused by the agglomeration of the white carbon black is avoided, and meanwhile, the adsorption of the white carbon black to an accelerator and an auxiliary agent is reduced, so that the effect of fully utilizing and reducing loss is achieved.
The resorcinol formaldehyde resin is prepared by reacting resorcinol with hexamethylenetetramine, avoids volatilization loss of resorcinol at high temperature in the rubber mixing process, and is preferably low in free resorcinol content.
The superfine particle size zinc oxide reduces the particle size of the zinc oxide by a special grinding technology on the basis of processing the conventional zinc oxide, avoids the zinc oxide from becoming a stress concentration point, and improves the activity of the zinc oxide.
Compared with the prior art, the puncture-resistant low-split underground engineering tire sidewall composition and the preparation method thereof have the following beneficial effects:
in order to ensure normal order of production, various high polymers are introduced into a common natural rubber and butadiene rubber composition, and in order to realize the purpose of resisting puncture low crack growth, styrene-butadiene rubber with high styrene content is selected through a large number of experiments, so that the aim of resisting puncture is realized by increasing a styrene chain segment to ensure the steric hindrance of the high polymers on the basis of ensuring the flexibility of the conventional sidewall, and the tensile product of the sidewall is improved and the crack growth is reduced through optimizing the composition components; and meanwhile, an auxiliary network of meta-alpha-white is introduced, so that the crack growth is further delayed, the heat generation is reduced, and the service life of the tire is prolonged. According to the invention, the polymer system of the sidewall composition is regulated, so that the sidewall part of the engineering machinery tire is not easily scratched under the condition of not increasing reinforcing ribs, and the crack growth rate after cutting injury is low.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
The present invention will be described in detail with reference to examples.
Example 1
Preparation of sizing materials
The master batch is mixed on a GK400 internal mixer, the upper ram pressure is 6.5ba, and the mixing process is as follows: opening the feeding door, feeding glue and pressing fine materials (the rotating speed is 50 r.min) -1 ) Adding carbon black into the bolt at 30 seconds, pressing the bolt, and extracting the bolt at 125 ℃ (the rotating speed is 45 r.min) -1 ) Pressing bolts, discharging glue at 160 ℃ and discharging glue by an open mill;
the final mixing is carried out on a GK255 internal mixer, the upper ram pressure is 6.5ba, and the mixing process is as follows: open feedDoor-master batch and sulfur fine material pressing bolt (rotation speed of 25 r.min -1 ) 50 seconds of bolt extraction and bolt pressing (rotating speed of 20 r.min) -1 ) 100 seconds of bolt lifting, 100 ℃ glue discharging, and glue discharging of an open mill; comparative example 1
Sizing material preparation is described in example preparation processes [0023], [0024];
physical and mechanical properties of vulcanized rubber compound
The physical and mechanical properties of the reference and example vulcanized compounds are shown in the following Table
From the physical and mechanical properties of comparative example 1 and example 1, it can be seen that the tensile stress is significantly higher than that of the reference, the hardness is slightly higher, and the elongation is reduced, which is an effect of increasing the synthetic rubber and assisting the network with meta-white, the cutting depth is significantly reduced, and the tear strength is significantly improved compared with that of the reference, and the increase rate of the split can be reduced.
By comparing actual use of engineering tires, the tire sidewall injury and crack growth of the tire sidewall with the tire sidewall composition of the invention reach the level of reinforcing ribs under the condition of no reinforcing ribs, and the tire sidewall composition is also effective in mass market.
Claims (7)
1. A puncture resistant low-split downhole engineering tire sidewall composition characterized by: comprises the following components:
20.0 to 60.0 portions of end group modified natural rubber;
10.0 to 60.0 portions of star rubber;
1.0 to 40.0 portions of high benzene rubber;
0 to 10.0 parts of liquid regenerated rubber;
30.0 to 60.0 parts of carbon black;
1.0 to 20.0 portions of pre-dispersed granulated white carbon black;
1.0 to 4.0 portions of silane coupling agent;
2.0 to 5.0 portions of superfine zinc oxide;
0.1 to 2.0 portions of functional modifier;
0.5 to 3.0 portions of stearic acid;
1.0 to 5.0 portions of tackifying resin;
0.5 to 5.0 parts of resorcinol formaldehyde resin;
2.0 to 5.0 portions of anti-aging agent;
0.5 to 3.0 parts of accelerator;
0.5 to 3.0 portions of sulfur;
0 to 0.5 portion of scorch retarder.
2. A puncture resistant low split-spread downhole engineering tire sidewall composition according to claim 1, wherein: the star rubber is a synthetic rubber with a block reaction star structure.
3. A puncture resistant low split-spread downhole engineering tire sidewall composition according to claim 1, wherein: the pre-dispersed and granulated white carbon black is surface-treated white carbon black.
4. A method of preparing a puncture resistant low split spread downhole engineering tire sidewall composition according to any of claims 1-3, characterized by: the method comprises the following steps:
s1: mixing the master batch on an internal mixer, wherein the mixing process comprises feeding, feeding and pressing the rubber and fine materials, lifting the bolts for a period of time, adding carbon black, pressing the bolts, lifting the bolts again, pressing the bolts again, discharging the rubber at a certain temperature, and discharging rubber materials from an open mill;
s2: the final mixing is carried out on an internal mixer, the mixing process comprises the steps of opening a feed gate, feeding masterbatch and pressing a sulfur fine material, lifting the stopper after a certain time, lifting the stopper again after one end of the pressing stopper, discharging the masterbatch under a certain taste, and discharging the masterbatch from the internal mixer.
5. A method of preparing a puncture resistant low split spread downhole engineered tire sidewall composition as in claim 4, wherein: the mixing speed of the master batch in the step S1 on an internal mixer is 50 r.min -1 Upper ram pressure 6.5ba;
in the step S2, the final mixing is carried out on an internal mixer at a mixing rotating speed of 25 r.min -1 The upper ram pressure was 6.5ba.
6. A method of preparing a puncture resistant low split spread downhole engineered tire sidewall composition as in claim 4, wherein: and (3) feeding rubber and pressing the fine materials in the step (S1), then carrying out bolt lifting and adding carbon black for 30 seconds, pressing the bolts again, lifting the bolts at the temperature of 125 ℃, pressing the bolts again, discharging rubber at the temperature of 160 ℃, and discharging rubber materials from an open mill.
7. A method of preparing a puncture resistant low split spread downhole engineered tire sidewall composition as in claim 4, wherein: and in the step S2, a feeding door is opened, masterbatch and sulfur fine materials are fed to be pressed and fastened, 50 seconds of bolt lifting is performed, 100 seconds of bolt lifting is performed, the rubber discharging is performed at the temperature of 100 ℃, and the rubber material of the open mill is fed.
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| CN112779787A (en) * | 2020-12-25 | 2021-05-11 | 贵州轮胎股份有限公司 | Fiber gum dipping system, steel wire rubberizing system and preparation method thereof |
| WO2022100629A1 (en) * | 2020-11-11 | 2022-05-19 | 赛轮集团股份有限公司 | Low-heat-generation, tear-resistant rubber composition for engineering tire and preparation method therefor |
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2022
- 2022-12-30 CN CN202211729923.1A patent/CN116120643A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4444236A (en) * | 1981-06-24 | 1984-04-24 | The Toyo Rubber Industry Co., Ltd. | Tire tread having low rolling resistance |
| US20020011293A1 (en) * | 1999-03-02 | 2002-01-31 | David John Zanzig | Tire with reinforced rubber sidewall |
| JP2004238547A (en) * | 2003-02-07 | 2004-08-26 | Bridgestone Corp | Rubber composition and method for producing the same |
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