CN110406330B - Anti-puncture tread rubber and preparation method thereof - Google Patents
Anti-puncture tread rubber and preparation method thereof Download PDFInfo
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- CN110406330B CN110406330B CN201910669069.6A CN201910669069A CN110406330B CN 110406330 B CN110406330 B CN 110406330B CN 201910669069 A CN201910669069 A CN 201910669069A CN 110406330 B CN110406330 B CN 110406330B
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- 229920001971 elastomer Polymers 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title abstract description 7
- 230000008719 thickening Effects 0.000 claims abstract description 17
- 229920006231 aramid fiber Polymers 0.000 claims abstract description 14
- 238000000034 method Methods 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 5
- 239000004760 aramid Substances 0.000 claims description 14
- 229920005549 butyl rubber Polymers 0.000 claims description 13
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims description 12
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 claims description 9
- 239000012530 fluid Substances 0.000 claims description 9
- 239000003292 glue Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 7
- 238000004519 manufacturing process Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- JIGUQPWFLRLWPJ-UHFFFAOYSA-N Ethyl acrylate Chemical compound CCOC(=O)C=C JIGUQPWFLRLWPJ-UHFFFAOYSA-N 0.000 claims description 6
- 229920001577 copolymer Polymers 0.000 claims description 6
- 239000012153 distilled water Substances 0.000 claims description 6
- 239000000839 emulsion Substances 0.000 claims description 6
- 239000004005 microsphere Substances 0.000 claims description 6
- PNJWIWWMYCMZRO-UHFFFAOYSA-N pent‐4‐en‐2‐one Natural products CC(=O)CC=C PNJWIWWMYCMZRO-UHFFFAOYSA-N 0.000 claims description 6
- USHAGKDGDHPEEY-UHFFFAOYSA-L potassium persulfate Chemical compound [K+].[K+].[O-]S(=O)(=O)OOS([O-])(=O)=O USHAGKDGDHPEEY-UHFFFAOYSA-L 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 238000002791 soaking Methods 0.000 claims description 4
- 238000000498 ball milling Methods 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000004073 vulcanization Methods 0.000 claims description 3
- 230000000994 depressogenic effect Effects 0.000 claims description 2
- 150000001875 compounds Chemical class 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 2
- 238000011031 large-scale manufacturing process Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 52
- 239000003981 vehicle Substances 0.000 description 13
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 229920003235 aromatic polyamide Polymers 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- XRASRVJYOMVDNP-UHFFFAOYSA-N 4-(7-azabicyclo[4.1.0]hepta-1,3,5-triene-7-carbonyl)benzamide Chemical compound C1=CC(C(=O)N)=CC=C1C(=O)N1C2=CC=CC=C21 XRASRVJYOMVDNP-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
Classifications
-
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
-
- 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
- B60C19/00—Tyre parts or constructions not otherwise provided for
- B60C19/12—Puncture preventing arrangements
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F212/00—Copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by an aromatic carbocyclic ring
- C08F212/02—Monomers containing only one unsaturated aliphatic radical
- C08F212/04—Monomers containing only one unsaturated aliphatic radical containing one ring
- C08F212/06—Hydrocarbons
- C08F212/08—Styrene
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Tires In General (AREA)
Abstract
The invention relates to a puncture-proof tread rubber and a preparation method thereof, belonging to the field of tire rubber. According to the method, the aramid fiber is soaked in the shear thickening liquid to obtain a compound, the compound is arranged on the inner surface of the tire tread of the tire to serve as the puncture-proof layer, and the physical characteristic that the puncture-proof layer can be quickly hardened when encountering severe impact is utilized, so that the purpose of preventing the tire from being punctured and causing tire burst is achieved. The thickness of the puncture-proof layer in the invention is a preferable thickness designed by considering factors such as puncture-proof requirement and economic cost. The method has simple process and good effect, is widely suitable for various vehicle types and is suitable for large-scale production.
Description
Technical Field
The invention belongs to the field of tire rubber, and relates to a puncture-resistant tread rubber and a preparation method thereof.
Background
Road traffic safety is a very important issue today. When a vehicle runs, the road condition has uncertainty, and sharp objects such as screws and stones are difficult to avoid on the road. When the vehicle runs at high speed, the tire is easy to be deflated and the tire is easy to be blown out if the vehicle runs at high speed. How to solve the potential safety hazard also becomes a difficult problem for current tire manufacturers.
The most of the current tires on the market are run flat tires, namely run flat tires, and the sidewalls of the inflated tires are the main parts for supporting the weight of the vehicle, especially some tires with larger flat ratio (the flat ratio is the ratio of the height to the width of the tire), and the sidewalls are very thick. The RSC run-flat tire cannot collapse after being deflated, mainly because the thickened rubber side wall can support the weight of a vehicle even if air pressure is lost, and serious deformation cannot be caused, so that the running of the vehicle cannot be seriously influenced after the tire is blown flat, and even an owner of the vehicle cannot feel the tire. When the explosion-proof tire is deflated, the vehicle can still run for 80 kilometers at the speed of 80 kilometers per hour; if the driver does not experience driving after a tire burst (most people do not), a wrong driving action (e.g., hard braking) may be made, which may result in an irreparable loss of control of the vehicle. The principle of the tire is that a high-molecular rubber material is sprayed on the inner wall (the inner surface of a part in contact with the ground) of the tire tread through professional equipment to form a protective layer with the thickness of about 5mm, pinning is not leaked, the nail can be automatically repaired without repair after being pulled out, the nail still needs to be pulled out after subsequent treatment, the nail is not pulled out, and other parts of the tire can be damaged in the running process of an automobile, and the tire is high in cost and is mainly used for luxury cars. Therefore, it is required to develop a method for manufacturing a tire that prevents penetration of nails and has low cost and high safety.
Disclosure of Invention
In view of the above, the present invention aims to provide a puncture-resistant tread rubber and a preparation method thereof. The tread rubber provided by the invention is applied to the tire, can prevent nails from penetrating into the tire, does not influence driving, and is high in safety and low in cost.
The invention provides a puncture-proof tread rubber which comprises a tread layer, and a butyl rubber plate, a puncture-proof layer and a thin rubber plate which are sequentially adhered to the inner surface of the tread layer, wherein the puncture-proof layer is a compound of aramid (phenylene terephthalamide) and shear thickening fluid.
Preferably, the thickness of the puncture-proof layer is 3-13 mm.
Preferably, the thickness of the puncture-proof layer is 3 mm.
The invention also provides a manufacturing method of the anti-puncture tread rubber, which comprises the following steps:
s1: preparing a shear thickening fluid;
s2: soaking aramid fibers in the shear thickening solution prepared in the step S1 for 1-3 minutes, taking out the aramid fibers and drying the aramid fibers to obtain a puncture-proof layer;
s3: and sequentially adhering a butyl rubber plate, the puncture-proof layer and the thin rubber plate to the inner surface of the tire tread layer to obtain the puncture-proof tread rubber.
Preferably, the preparation method of the shear thickening fluid comprises the following steps:
s11: adding styrene, ethyl acrylate, distilled water and potassium persulfate into a reaction container, stirring under the protection of nitrogen until the styrene, the ethyl acrylate, the distilled water and the potassium persulfate are uniformly mixed, placing the mixture into a water bath kettle at the temperature of 60 ℃, and reacting for 12 hours under stirring to obtain emulsion;
s12: centrifuging and drying the emulsion to obtain polystyrene-ethyl acrylate copolymer microspheres;
s13: and adding ethylene glycol into the polystyrene-ethyl acrylate copolymer microspheres and then carrying out ball milling to obtain the shear thickening liquid.
Preferably, the step S3 specifically includes:
bonding one surface of the butyl rubber plate with the inner surface of the tread layer by using ABS glue;
bonding one surface of the puncture-proof layer on the other surface of the butyl rubber plate by using silicon rubber heat vulcanization glue;
and (3) bonding a thin rubber plate on the other surface of the anti-puncture layer by using silicon rubber heat vulcanized glue to obtain the anti-puncture tread rubber.
Compared with the prior art, the invention has the following beneficial effects:
1. the shear thickening fluid is fixed on the aramid fiber fabric through a high molecular technology to form a puncture-proof layer, and the puncture-proof layer is placed behind a tread layer of the tire so that the tire can be prevented from being punctured when the tire touches sharp stones or screws during high-speed running of a vehicle. Even the condition that the tire is blocked on the tire by the nail appears, because the roll of tire, the impact begins sharp object for the second time and can carry out the secondary impact with the inclined plane more, and the driver finds the strange appearance and can in time stop the processing, if the vehicle inner tube is not damaged, still can continue to travel after the sharp object is removed to the vehicle and do not hinder.
2. Combine to prevent puncturing layer and tire tread layer, prevent puncturing the layer when the tire suffer destruction only need change contain prevent puncturing the layer tread material can, ensure safety on the one hand, on the other hand can greatly reduced cost of maintenance.
3. The thickness of the puncture-proof layer selected by the invention is a better result obtained by considering a plurality of factors such as deformation of materials, constitutive relation of endured force, preparation cost of the puncture-proof layer and the like, and the tire can have stronger puncture-proof performance at lower cost.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a puncture-proof tread rubber which comprises a tread layer, and a butyl rubber plate, a puncture-proof layer and a thin rubber plate which are sequentially adhered to the inner surface of the tread layer, wherein the puncture-proof layer is a compound of aramid and shear thickening fluid.
The tire is generally composed of an outer tire casing, an inner tire casing and a cushion belt 3. The outer tire consists of a tire body, a buffer layer (or called a belted layer), a tire tread, a tire side and a tire bead. The tread is a part contacting with the ground, and if a sharp object is encountered during high-speed running, the tire is easy to puncture and burst. Therefore, the puncture-proof layer is additionally arranged on the inner surface of the tread layer, so that the problem of tire burst caused by puncture of the tire can be avoided, and the problem of subsequent tire replacement and repair troubles caused by puncture of the tire can be solved. The adoption of the butyl rubber plate and the thin rubber plate on two sides of the puncture-proof layer is beneficial to better fitting with the tread layer and the inner surface. Wherein the thickness of the puncture-proof layer is preferably 3-13 mm, and more preferably 3 mm.
Wherein, the thickness of the puncture-proof layer is calculated according to a tire stress model, the establishment of the tire stress model mainly considers the constitutive relation of the deformation and the bearing force of the material and the economic cost,
often, a moving vehicle will roll on sharp objects, and the tire will locally deform at the contact point. We deal with this case: in the axial direction along the sharp object at r0Taking a free body of the tire for one circle of rotation by the radius, wherein the shape of the free body is similar to a flat cylinder, the free body is changed into a cone under the action of a sharp object, the section of the tire is mainly tensile stress, N represents the acting force of the sharp object on the tire, and the free body is obtained according to a balance relation
N＝σAsinθ\*MERGEFORMAT(1)
In which theta is the angle between the concave tread and the ground, and A is the area of action of tensile stress (cylindrical surface)
A＝2πr0h\*MERGEFORMAT(2)
Wherein h is the tire thickness. By bringing the formula into
N＝2πr0hσsinθ\*MERGEFORMAT(3)
When the height of the lifting of the sharp object is H, the tread and the ground form an angle theta which is tangent to
At the same time, the original radius r is near the contact point0Becomes r, the correspondence thus occurring becomes
The expression of strain epsilon is substituted into formula, and the relational expression of the supporting force N and the strain epsilon can be established.
N(ε)＝2πr0hσ(ε)sinθ\*MERGEFORMAT(6)
Wherein
Therefore, the tire stress model established in the present invention is as follows:
in the above formula, ∈1Denotes strain, ε, of the rubber2Represents the strain of the anti-puncture layer, theta is the angle between the depressed tread and the ground, h1Thickness of rubber, h2Thickness of the puncture-preventing layer, N pressure, r0The radius of the force-receiving area is shown, and C represents the cost.
And (3) operating the model shown in the formula by MATLAB to obtain the maximum thickness of the puncture-proof layer of 3 mm.
The invention also provides a manufacturing method of the anti-puncture tread rubber, which comprises the following steps:
s1: preparing a shear thickening fluid;
s2: soaking aramid fibers in the shear thickening solution prepared in the step S1 for 1-3 minutes, taking out the aramid fibers and drying the aramid fibers to obtain a puncture-proof layer;
s3: and sequentially adhering a butyl rubber plate, the puncture-proof layer and the thin rubber plate to the inner surface of the tire tread layer to obtain the puncture-proof tread rubber.
First, a shear thickening fluid is prepared, preferably by the following method:
s11: adding styrene, ethyl acrylate, distilled water and potassium persulfate into a reaction container, stirring under the protection of nitrogen until the styrene, the ethyl acrylate, the distilled water and the potassium persulfate are uniformly mixed, placing the mixture into a water bath kettle at the temperature of 60 ℃, and reacting for 12 hours under stirring to obtain emulsion;
s12: centrifuging and drying the emulsion to obtain polystyrene-ethyl acrylate copolymer microspheres;
s13: and adding ethylene glycol into the polystyrene-ethyl acrylate copolymer microspheres and then carrying out ball milling to obtain the shear thickening liquid.
Then, soaking aramid fibers in the shear thickening liquid prepared in the step S1 for 1-3 minutes, taking out the aramid fibers and drying the aramid fibers to obtain a puncture-proof layer;
finally, adhering one surface of the butyl rubber plate to the inner surface of the tread layer by using ABS glue; bonding one surface of the puncture-proof layer on the other surface of the butyl rubber plate by using silicon rubber heat vulcanization glue; and (3) bonding a thin rubber plate on the other surface of the anti-puncture layer by using silicon rubber heat vulcanized glue to obtain the anti-puncture tread rubber.
According to a tire stress model, anti-puncture layers with different thicknesses are added in a simulated mode, namely pressure distribution with different thicknesses is simulated under the conditions of 0mm, 3mm and 6 mm.
Since the stress is related to the strain and the thickness, and the strain is proportional to the stress, the strain removal is a specific value, that is, when ∈ is 0.15.
N＝0.421πr0h1+12243.241πr0h2
In the formula, h1Denotes the thickness of the rubber, h2Thickness of the puncture-preventing layer, N pressure, r0Representing the radius of the force-receiving area.
Considering first the case of adding a 0mm puncture-proof layer, let h113m, m and h2Substituting 0mm into the above equation, the average tire force was found to be 2278.7N.
Then calculate h with the addition of a 3mm puncture-proof layer110mm and h2Substituting the formula for 3mm, and solving the average value of the stress of the tire to be 1890.2N;
in the same way, h is calculated to be equal to 6mm17mm and h2The average force was 1837.9N for 6 mm.
Simulating the tire added with the puncture-proof layers with different thicknesses, and analyzing the related data after simulation to obtain the puncture-proof layer with the pressure of 0.939% reduced when the puncture-proof layer with 0.1mm is added in the range of 0mm to 3 mm; in the range of 3mm to 6mm, the pressure is reduced by 0.542% for every 0.1mm of the anti-puncture layer. The simulation results fully indicate that the preferred thickness of the puncture-proof layer is 3mm from the viewpoint of puncture-proof performance and economic cost.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. A method for manufacturing a puncture-proof tread rubber, the puncture-proof tread rubber comprises a tread layer, a butyl rubber plate, a puncture-proof layer and a thin rubber plate which are sequentially adhered to the inner surface of the tread layer,
the thickness of the puncture-proof layer is determined to be 3mm according to a tire stress model shown as the following formula:
in the above formula, ∈1Denotes strain, ε, of the rubber2Represents the strain of the anti-puncture layer, theta is the angle between the depressed tread and the ground, h1Denotes the rubber thickness, h2Thickness of the puncture-preventing layer, N pressure, r0Radius representing the force area, C represents the cost;
the manufacturing method of the puncture-proof tread rubber comprises the following steps:
s1: preparing a shear thickening fluid;
s2: soaking aramid fibers in the shear thickening solution prepared in the step S1 for 1-3 minutes, taking out the aramid fibers and drying the aramid fibers to obtain a puncture-proof layer;
s3: and sequentially adhering a butyl rubber plate, the puncture-proof layer and the thin rubber plate to the inner surface of the tire tread layer to obtain the puncture-proof tread rubber.
2. The method for manufacturing the puncture-proof tread rubber according to claim 1, wherein the method for preparing the shear thickening fluid comprises the following steps:
s11: adding styrene, ethyl acrylate, distilled water and potassium persulfate into a reaction container, stirring under the protection of nitrogen until the styrene, the ethyl acrylate, the distilled water and the potassium persulfate are uniformly mixed, placing the mixture into a water bath kettle at the temperature of 60 ℃, and reacting for 12 hours under stirring to obtain emulsion;
s12: centrifuging and drying the emulsion to obtain polystyrene-ethyl acrylate copolymer microspheres;
s13: and adding ethylene glycol into the polystyrene-ethyl acrylate copolymer microspheres, and then carrying out ball milling to obtain the shear thickening liquid.
3. The method for manufacturing a puncture-resistant tread rubber according to claim 1, wherein the step S3 is specifically:
bonding one surface of the butyl rubber plate with the inner surface of the tread layer by using ABS glue;
bonding one surface of the puncture-proof layer on the other surface of the butyl rubber plate by using silicon rubber heat vulcanization glue;
and (3) bonding a thin rubber plate on the other surface of the anti-puncture layer by using silicon rubber heat vulcanized glue to obtain the anti-puncture tread rubber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910669069.6A CN110406330B (en) | 2019-07-24 | 2019-07-24 | Anti-puncture tread rubber and preparation method thereof |
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| CN201910669069.6A CN110406330B (en) | 2019-07-24 | 2019-07-24 | Anti-puncture tread rubber and preparation method thereof |
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| WO2004103231A1 (en) * | 2003-05-19 | 2004-12-02 | University Of Delaware | Advanced body armor utilizing shear thickening fluids |
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| CN105121995A (en) * | 2013-03-15 | 2015-12-02 | 斯科特·R·惠特克 | Ballistic shield comprising a laminate of a plurality of resistant layers |
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2019
- 2019-07-24 CN CN201910669069.6A patent/CN110406330B/en active Active
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| WO2004103231A1 (en) * | 2003-05-19 | 2004-12-02 | University Of Delaware | Advanced body armor utilizing shear thickening fluids |
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Application publication date: 20191105 Assignee: Nantong Risheng Road Engineering Materials Co.,Ltd. Assignor: NANTONG University Contract record no.: X2023980044970 Denomination of invention: An anti puncture tire tread adhesive and its preparation method Granted publication date: 20211012 License type: Common License Record date: 20231031 |