WO2008038463A1 - Pneumatique gonflable - Google Patents

Pneumatique gonflable Download PDF

Info

Publication number
WO2008038463A1
WO2008038463A1 PCT/JP2007/065423 JP2007065423W WO2008038463A1 WO 2008038463 A1 WO2008038463 A1 WO 2008038463A1 JP 2007065423 W JP2007065423 W JP 2007065423W WO 2008038463 A1 WO2008038463 A1 WO 2008038463A1
Authority
WO
WIPO (PCT)
Prior art keywords
rubber
tire
conductive
pneumatic tire
carbon black
Prior art date
Application number
PCT/JP2007/065423
Other languages
English (en)
Japanese (ja)
Inventor
Norihiko Nakamura
Original Assignee
Toyo Tire & Rubber Co., Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toyo Tire & Rubber Co., Ltd. filed Critical Toyo Tire & Rubber Co., Ltd.
Publication of WO2008038463A1 publication Critical patent/WO2008038463A1/fr

Links

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
    • B60C19/00—Tyre parts or constructions not otherwise provided for
    • B60C19/08—Electric-charge-dissipating arrangements
    • 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
    • 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
    • B60C11/0008—Tyre tread bands; Tread patterns; Anti-skid inserts characterised by the tread rubber
    • B60C2011/0016—Physical properties or dimensions
    • 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
    • B60C13/00—Tyre sidewalls; Protecting, decorating, marking, or the like, thereof
    • B60C2013/005—Physical properties of the sidewall rubber
    • 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 

Definitions

  • the present invention relates to a pneumatic tire, and more specifically, has a tread made of silica or the like, improves tire rolling resistance and wet performance, and discharges static electricity charged to a vehicle to a road surface.
  • the present invention relates to a pneumatic tire manufactured by a conventional method.
  • Patent Document 1 a conductive thin film containing carbon black is laid on the outer surface of a tread and a sidewall and discharged through this conductive layer.
  • Patent Document 2 a conductive insert is provided on the tire crown from the tread surface to the bottom surface, and a conductive strip made of a conductive material in contact with the insert contacts the wheel in the conductive bead region. It is disclosed that static electricity is discharged by being in a state.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 8-230407
  • Patent Document 2 Japanese Unexamined Patent Publication No. 2006-143208
  • Patent Document 1 the effect of improving the tread rolling resistance and wet performance due to the silica compound is reduced by laying the conductive thin film containing the carbon black, and the original effect is sufficiently exhibited. It's getting harder. Conductive thin film containing carbon black Since the membrane is laid on the outer surface of the tread and sidewalls, additional members and processes are required, and productivity and cost increase are expected.
  • Patent Document 2 requires a separate conductive insert and strip, which increases the number of parts and requires a special process to be easy to manufacture. A decline in sex is expected.
  • an object of the present invention is to provide a rolling force ⁇ resistance that can be manufactured by a conventional method without the need for a special tire manufacturing process and without the addition of a member process.
  • a pneumatic tire having excellent wet performance and conductivity is provided. Means for solving the problem
  • the invention described in claim 1 includes a rim strip disposed in a bead portion and a sidewall that contacts the rim strip and extends outward from the bead portion in the tire radial direction and is connected to a ground contact end region of the tread portion.
  • a pneumatic tire having a portion, wherein at least a surface portion of the rim strip, the sidewall portion, and the ground contact end region is continuously formed by a conductive rubber material on a circumference of a side portion on one side or both sides of the tire.
  • the conductive path is used as a current path for the tire, and other members than the current path are selected from a conductive rubber material or a non-conductive rubber material. It is a pneumatic tire.
  • the invention according to claim 2 is the pneumatic tire according to claim 1, wherein the tire radial outer end force of the sidewall portion is integrally formed with the ground contact end region.
  • the invention described in claim 3 includes wings that are disposed at both ends of the tread portion in the tire axial direction and that form a surface portion of the ground contact end region in contact with the sidewall portion.
  • the invention according to claim 4 is characterized in that the conductive rubber material is a rubber composition having an electrical resistivity of less than 10 8 ⁇ 'cm. It is a pneumatic tire.
  • the invention according to claim 5 is characterized in that the rubber composition comprises a gen-based rubber as a rubber component, and nitrogen adsorption specific surface area of 25 to 100 m 2 / g of carbon black is 14 volumes of the whole rubber composition.
  • the invention according to claim 6 is the pneumatic tire according to claim 1, wherein the non-conductive rubber material comprises a rubber composition containing a non-carbon black reinforcing agent as a reinforcing agent. It is.
  • the invention according to claim 7 is the pneumatic tire according to claim 6, wherein the non-carbon black reinforcing agent is silica.
  • the sidewall, the rim strip, and the wing are each formed of one type of rubber composition on the circumference of the tire by a conventional method, and thus disclosed in the prior art. It does not require a special tire manufacturing process, and it can be manufactured by conventional methods without the need for additional member processes. Excellent rolling force due to silica compounding etc. ⁇ Equipped with resistance and wet performance. Tires can be provided, and noise caused by static electricity charged on a vehicle using a non-conductive tire such as a silica compound, adverse effects on electronic parts, and short-circuit problems can be solved.
  • FIG. 1 is a half sectional view showing a pneumatic tire 10 of the first embodiment.
  • a pneumatic tire (hereinafter, a pneumatic tire is simply referred to as a "tire") 10 includes a pair of bead portions 11 that are assembled into a rim, and sidewalls that extend outward from the bead portions 11 in the tire radial direction.
  • the shoulder portion 17 is located on both sides of the portion 13 and forms a ground end region and continues to the sidewall portion 16.
  • the tire 10 includes a rim strip 19 that comes into contact with the flange of the rim disposed on the outer side in the tire axial direction of the bead portion 11, and the lower end portion of the sidewall portion 16 overlaps and contacts the end portion of the rim strip 19. is doing.
  • the tire 10 has an outer end portion in the tire radial direction of the sidewall portion 16.
  • Force S tread rubber 21 A side wall on tread (SWOT) structure is built on top of the end. That is, the outer end portion force of the sidewall portion 16 forms a shoulder portion 17 that covers the surface of both peripheral portions of the tread portion 13 and serves as a tread grounding end region on the tire circumference.
  • SWOT side wall on tread
  • the tire 10 has two carcass plies made of cords arranged in a radial direction around the bead cores 12 embedded in the pair of bead portions 11, folded back from the inside of the tire to the outside and locked.
  • Carcass 14, belt 18 composed of two cross belt plies arranged inside the tread portion 13, and the outer periphery of the belt 18 spirally wound at an angle of approximately 0 ° with respect to the tire circumferential direction.
  • the figure shows a radial tire for a passenger car with a single cap ply 20 made of a twisted cord.
  • the carcass ply of the carcass 14 includes organic fiber cords such as polyester, nylon, and rayon, the belt ply of the belt 18 includes rigid cords such as steel cord and aramid fiber, and the cap ply 20 includes Is relatively large in heat shrinkage of nylon, polyester, etc., and cords are used as reinforcing materials!
  • the tread rubber 21 of the crown portion 15 that forms the main ground contact portion of the tread portion 13 contributes to improvement of the rolling resistance and wet performance of the tire 10, so that the tan ⁇ of the rubber composition is lowered.
  • a rubber composition containing a non-carbon black reinforcing agent such as precipitated silica, silica such as anhydrous caic acid, clay such as calcined clay or hard clay, or non-carbon black reinforcing agent such as calcium carbonate by replacing with conventional carbon black. used.
  • silica is preferably used because of its large improvement effect such as rolling resistance.
  • the amount of the non-carbon black reinforcing agent such as silica is usually 30 to 100 parts by weight, preferably 40 to 40 parts by weight based on 100 parts by weight of the rubber component, although it depends on the type and substitution amount of the carbon black. Blended in 80 parts by weight.
  • silica the type of silica is not particularly limited, but wet silica with a nitrogen adsorption specific surface area (BET) of 100 to 250 m 2 / g and a DBP oil absorption of 100 ml / 100 g or more is used as a reinforcing effect and additive.
  • BET nitrogen adsorption specific surface area
  • Commercially available products such as Nipsil AQ and VN3 manufactured by Tosoh Silica Industry Co., Ltd., and Ultrazil VN3 manufactured by Degussa, which are preferable from the viewpoint of the above, can be used.
  • a silane coupling agent such as bis (triethoxysilylpropyl) monotetrasulfide.
  • SAF, ISAF, HAF, etc. are preferred as carbon black in the tread rubber 21 from the viewpoint of wear resistance and heat generation!
  • the rubber composition of the tread rubber 21 is a rubber component such as natural rubber (NR), isoprene rubber (IR), styrene butadiene rubber (SBR), butadiene rubber (BR), etc. Commonly used in blend rubber. Further, softeners such as oils and waxes for rubber compounding agents, stearic acid, zinc white, resins, anti-aging agents, vulcanizing agents such as sulfur, vulcanization accelerators, and the like are appropriately blended.
  • NR natural rubber
  • IR isoprene rubber
  • SBR styrene butadiene rubber
  • BR butadiene rubber
  • softeners such as oils and waxes for rubber compounding agents, stearic acid, zinc white, resins, anti-aging agents, vulcanizing agents such as sulfur, vulcanization accelerators, and the like are appropriately blended.
  • the tread rubber 21 becomes a non-conductive rubber with a force resistance that improves rolling resistance and wet performance, whereas the electrical resistivity of the rubber composition becomes 10 8 ⁇ 'cm or more.
  • the tire 10 becomes non-conductive at the tread grounding portion, and the tire becomes a non-conductive tire with an electric resistance of 10 9 ⁇ or more by combining the members, and the rim strip rubber 23 and the side of the bead portion 11 Even if conductive rubber is used for the side wall rubber 22 of the wall portion 16, static electricity charged to the vehicle cannot be discharged from the tread portion 13 to the road surface.
  • the tire 10 of the present embodiment is provided with a sidewall rubber 22 and a rim strip rubber 23 on the circumference of the tire 10 on at least one side portion of the tire.
  • Conductive rubber with an electrical resistivity of less than 10 8 ⁇ 'cm is applied.
  • the rim strip rubber 23 and the side wall rubber 22 are formed in a continuous conductive path.
  • the tire 10 uses only the conductive path as an energization path, and static electricity charged to the vehicle is an outer end portion of the side wall rubber 22 that forms a ground end region through the rim strip rubber 23 and the side wall rubber 22 from the rim. It is discharged from the shoulder 17 to the road surface.
  • Such a conductive rubber composition can be easily obtained by appropriately adjusting the blending amount of carbon black.
  • the electrical resistivity of the rubber composition is less than 10 7 ⁇ 'cm. Is desirable.
  • the conductive side wall rubber 22 includes NR, IR, SBR, BR, syndiotactic
  • the blend is a rubber component, and the nitrogen adsorption specific surface area (N SA) force is 5 to 100m 2 / g
  • Carbon black is contained in an amount of 14% by volume or more based on the total rubber composition.
  • the amount of carbon black is less than 14% by volume, the electrical resistivity of the rubber composition becomes 10 8 ⁇ 'cm or more, and the conductivity deteriorates. If the NSA of carbon black is less than 25m 2 / g
  • the durability of the rubber composition is lowered due to the decrease in strength, and when it exceeds 100 m 2 / g, the hysteresis loss increases and the rolling force ⁇ resistance and heat generation increase.
  • non-carbon black reinforcing agent silica, clay, calcium carbonate or the like may be used in combination with carbon black in an appropriate amount.
  • a rubber compounding oil, a softening agent such as wax, stearic acid, Zinc white, resins, anti-aging agents, vulcanizing agents such as sulfur, and vulcanization accelerators are appropriately blended.
  • the current-carrying path of the tire 10, that is, members other than the rim strip rubber 23 and the side wall rubber 22 should not have a current-carrying path! /, Selected from conductive rubber material or non-conductive rubber material in a range Can be used.
  • a non-conductive rubber having an electrical resistivity of 10 8 ⁇ 'cm or more is applied to the other side portion. It can also be applied.
  • the rolling resistance and wet performance of the tire 10 can be improved by increasing the amount of non-conductive rubber used.
  • the electrical resistance of the tire 10 is slightly increased as compared with the case where conductive rubber is applied to both side portions, but the discharge property of static electricity is not significantly reduced, and there is no practical problem.
  • the non-conductive side wall rubber can be obtained by changing only the blending amount of the conductive rubber and carbon black. That is, N SA is 25 ⁇ ; 100m 2 / g carbo
  • a rubber composition down black is contained less than 14 volume 0/0 of the total rubber composition.
  • the amount of carbon black is 14% by volume or more, the electrical resistivity of the rubber composition is less than 10 8 ⁇ 'cm, and the effect of improving the force rolling resistance that becomes conductive cannot be obtained.
  • NR, IR, SBR, BR, VCR and other gen-based rubbers are used alone or in a blend, and the NSA is 70 to 100 m 2 / g.
  • the electrical resistivity of the rubber composition is 10 8 ⁇ 'cm. As a result, the conductivity deteriorates. Also, if the NSA of carbon black is less than 70m 2 / g
  • Reduced wear resistance of the rubber composition makes it easy to cause bead damage due to rubbing of the rim, and when it exceeds 1 OOm 2 / g, hysteresis loss deteriorates and rolling resistance and heat generation increase.
  • Carbon black with N SA of 70-100m 2 / g is HAF grade carbon black
  • non-carbon black reinforcing agent silica, clay, calcium carbonate and the like may be used in combination with carbon black in appropriate amounts.
  • Zinc white, resins, anti-aging agents, vulcanizing agents such as sulfur, and vulcanization accelerators are appropriately blended.
  • the conductive rubber is also applied to the rim strip rubber 23 on the same side. That is, the conductive property of the tire can be ensured by applying the conductive rubber to the sidewall rubber 22 and the rim strip rubber 23 in pairs on one or both side portions of the tire 10.
  • the tread rubber 21 shows a tread having a single structure.
  • the cap rubber has rolling resistance and wet performance.
  • the base rubber can be appropriately selected from conductive or non-conductive rubber.
  • other parts such as tire 10 carcass, belt topping rubber, bead filler, etc. should not have an energization path! / In the range, it can be selected from conductive or non-conductive rubber as appropriate S, rolling resistance and wet From the viewpoint of improving the performance, it is preferable to select a non-conductive rubber.
  • FIG. 2 is a half sectional view showing the pneumatic tire 30 of the second embodiment.
  • the tire 30 is grounded to a pair of bead portions 31 to be rim assembled, a sidewall portion 36 extending outward in the tire radial direction from the bead portion 31, and a road surface provided between the sidewall portions 36, 36.
  • the tread portion 33 includes a crown portion 35 that forms a main ground contact portion at the center in the tire width direction, and a shoulder portion that is located on both sides of the tread portion 33 to form a ground contact end region and continues to the side wall portion 36. 37 and power.
  • the tire 30 is a rim strut that contacts a flange of a rim disposed on the radially outer side of the bead portion 31.
  • the lip 39 is provided, and the lower end portion of the side wall portion 36 is in contact with the rim strip 39 end portion.
  • the tire 30 has a tread over sidewall (TOS) structure in which both end portions of the tread portion 33 are overlapped with and overlapped with outer end portions of the sidewall portions 36.
  • TOS tread over sidewall
  • the tread portion 33 is positioned on the shoulder portion 37 forming the ground contact end region at both ends in the tire axial direction, and is in contact with the sidewall portion 36 to form the surface of the shoulder portion 37.
  • the tire 30 has two carcass plies made of cords arranged in a radial direction around the bead cores 32 embedded in the pair of bead portions 31, respectively, folded back from the inside of the tire to the outside and locked.
  • the figure shows a radial tire for a passenger car having a single cap ply 40 made of a twisted cord.
  • the carcass ply of the carcass 34 has an organic fiber cord such as polyester, nylon, and rayon.
  • the belt ply of the belt ply 38 has a rigid cord force such as a steel cord and aramid fiber. Nylon, polyester, etc. are relatively heat-shrinkable! /, And cords are used as reinforcements! /.
  • the tread rubber 41 is replaced with conventional carbon black as a reinforcing agent to reduce the tan ⁇ of the rubber composition in order to contribute to improvement of rolling resistance and wet performance in the same manner as the tire 10 described above.
  • a rubber composition using a non-carbon black reinforcing agent such as clay or calcium carbonate as a reinforcing agent is used, and a rubber composition having the same formulation as the tread rubber 21 described in the first embodiment is used.
  • the tire 30 becomes non-conductive at the tread ground portion and becomes a non-conductive tire having an electric resistance of 10 9 ⁇ or more as the tire, and the static electricity charged on the vehicle is transferred from the rim to the bead portion 31. It becomes impossible to discharge from the tread portion 33 to the road surface through the rim strip rubber 43 and the side wall rubber 42 of the side wall portion 36.
  • the tire 30 includes a wing rubber 44, a side warnole rubber 42, and a rim strip rubber 43 on at least one side portion of the tire.
  • conductive rubber with an electrical resistivity of less than 10 8 ⁇ 'cm is suitable.
  • the tire 30 uses only the conductive path as an energization path, and the static electricity charged to the vehicle forms a grounding end region from the rim through the rim strip rubber 43, the side wall rubber 42, and the wing rubber 44. It is discharged to the road surface from the shoulder 17 which is the outer edge of the road.
  • Such a conductive rubber composition can be easily obtained by appropriately adjusting the blending amount of carbon black.
  • the electrical resistivity of the rubber composition is less than 10 7 ⁇ 'cm. Is desirable.
  • conductive sidewall rubber 42 and rim strip rubber 43 a rubber composition having the same formulation as the sidewall rubber 22 and rim strip rubber 23 described in the first embodiment is used.
  • conductive wing rubber 44 carbon rubber having a NSA of 25 to 100 m 2 / g, which is composed of a single or blend of GEN rubbers such as NR, IR, SBR, BR and VCR.
  • Rack rubber composition is applied that contains 14 volume 0/0 or more of the entire rubber composition.
  • the amount of carbon black is less than 14% by volume, the electrical resistivity of the rubber composition becomes 10 8 ⁇ 'cm or more, and the conductivity deteriorates. If the NSA of carbon black is less than 25m 2 / g
  • Durability decreases due to the strength reduction of the rubber composition, and when it exceeds 100 m 2 / g, hysteresis loss deteriorates and rolling force, resistance and heat generation increase.
  • non-carbon black reinforcing agent silica, clay, calcium carbonate or the like may be used in combination with a single bon black.
  • rubber compounding agents such as oils and waxes are softening agents.
  • Stearic acid, zinc white, resins, anti-aging agent, vulcanizing agent such as sulfur, vulcanization accelerator and the like are appropriately blended.
  • the conductive path of the tire 30, that is, the rim strip rubber 43, the side wall rubber 4, and the wing rubber 44 other than the conductive rubber material or the non-conductive rubber material as long as the conductive path is not provided. You can choose from and use.
  • a non-carbon black reinforcing agent is applied to the other side portion.
  • Non-conductive rubber with a compounded electrical resistivity of 0 8 ⁇ 'cm or more may be applied.
  • the electrical resistance of the tire is slightly increased as compared with the case where conductive rubber is disposed on both side portions, but the discharge property of static electricity is not greatly reduced and is not practically affected.
  • the non-conductive wing rubber 44 can be obtained by changing only the blending amount of the conductive wing rubber and carbon black. That is, N SA is 25 ⁇ ; 100m 2 / g
  • the electrical resistivity of the rubber composition becomes less than 10 8 ⁇ 'cm and becomes conductive, but the effect of improving rolling resistance cannot be sufficiently obtained.
  • the conductive rubber is applied to the three members of the side wall rubber 42, the rim strip rubber 43 and the wing rubber 44 in order to secure the conductivity of the tire 30.
  • the cap is a force to which non-conductive rubber is applied.
  • the base is appropriately selected from conductive or non-conductive rubber. it can.
  • other parts such as tire 30 carcass, belt topping rubber, bead filler, etc. should not have a current-carrying path! / In the range, it can be selected appropriately from conductive or non-conductive rubber, but rolling resistance and wet performance It is preferable to select non-conductive rubber from the viewpoint of improving the quality.
  • the third embodiment is an example in which the method for forming the sidewall portion is changed. Is described using a cross-sectional view of the tire 10 of FIG.
  • the side wall portions 16 and 36 are formed of a single-piece belt-shaped side wall rubber formed by extrusion molding conductive or non-conductive rubber into a predetermined cross-sectional shape. Sometimes affixed to both sides.
  • a ribbon-shaped strip rubber that continuously includes a conductive rubber having an electrical resistivity of less than 10 8 ⁇ 'cm in the longitudinal direction is used as a rim strip 19 for the bead portion 11 at the time of green tire molding.
  • the side wall part 16 is wound continuously and spirally in the substantially circumferential direction of the side wall part 16 to form the side wall part 16 in a predetermined cross-sectional shape. This is a molding method called a method.
  • the ribbon-shaped strip rubber may be made of conductive rubber as a whole, but the conductive rubber is continuously included in the longitudinal direction in a part of the ribbon-shaped cross section made of non-conductive rubber. It may be a thing.
  • the conductive rubber portion is in contact with the rim strip 19 and is exposed to the surface of the grounding portion with the shoulder portion 17.
  • an energization path in which conductive rubber is spirally arranged in the sidewall portion 16 is formed, and the static electricity of the vehicle can be discharged to the road surface through the strip rubber.
  • a rubber composition that can contribute to improvement in rolling resistance and the like can be used as the non-conductive rubber.
  • Such a double-structured strip rubber is obtained by laminating a ribbon made of conductive rubber and non-conductive rubber. It can also be easily obtained by a twin screw extruder.
  • This strip build method can of course be applied to the tire 30 having the TOS structure shown in FIG. 2, and the rim strip 19 and the wing rubber 44 can also be formed by this strip build method. Furthermore, this method can also be used for molding sidewalls made of non-conductive rubber.
  • Table 1 shows a rubber composition for treads containing a conductive rubber and a non-conductive rubber in which the amount of carbon black is adjusted for the rim strip and sidewall rubber compositions, and silica.
  • the rubber components and compounding agents used are as follows.
  • the volume% of carbon black is a calculated value from the blending amount (parts by weight).
  • BR .butadiene rubber
  • SBR Styrene butadiene rubber
  • Carbon black for tread rubber IS AF Tokai Carbon Co., Ltd. Seast 6
  • Anti-aging agent 6C Nouchi 6C, Ouchi Shinsei Chemical Co., Ltd.
  • Zinc Oxide Mitsui Kinzoku Mining Co., Ltd. Zinc Hua 1
  • Vulcanization accelerator NS Ouchi Shinsei Chemical Industry Co., Ltd. Noxeller NS—P
  • the electrical resistivity of each rubber composition was measured according to JIS K6911 and is shown in Table 1.
  • the measurement conditions are an applied voltage of 1000V, an air temperature of 25 ° C, and a humidity of 50%.
  • the rim strip rubber and side wall rubber can be either conductive rubber (indicated by “ ⁇ ” in Table 2) or non-conductive rubber (indicated by “X” in Table 2) according to the combinations shown in Table 2.
  • the radial tire (195 / 65R15 88 S) having the SWOT structure shown in FIG. 1 changed to “Display” was manufactured, and the electrical resistance and rolling resistance were measured by the following methods.
  • the tread rubber shown in Table 1 was used in common for each tire.
  • the carcass is 1670dtex / 2 polyester cord, driving ply 22 cords / 25mm 1 ply, Benoleto is 2 + 2 X 0.25 steel cord, driving density 18 cords / 25mm 2 ply (crossing angle) 45 °), and cap ply used 940dtex / 2 nylon 66 cord, single piece structure with 28 / 25mm driving density.
  • the electrical resistance of the tire is as follows: Tire 10 is mounted on a standard rim R (15 X 6JJ) at a pressure of 200 kPa and mounted on a domestic FF-type passenger car with a displacement of 1600 cc. After the measurement, the measurement was performed based on the “Measurement procedure of tire electrical resistance under load” specified by the German WDK, Blatt 3. That is, as shown in FIG. 3, the rim-assembled tire 10 is vertically grounded at a load of 400 kg on a copper plate 131 installed in an insulating state with respect to the base plate 130, and the central portion of the standard rim R and the copper plate The electrical resistance to 131 was measured using a resistance measuring instrument 132 with an applied voltage of 1000 volts. The temperature at the time of measurement is 25 ° C and the humidity is 50%. The results are shown in Table 2.
  • the rolling resistance is measured by rolling a tire on a standard rim at a pressure of 200 kPa and measuring the rolling resistance.
  • a conductive rubber sheet is pasted on the side wall surfaces from the rim strip to the tread.
  • the pneumatic tire of the present invention includes a two-wheeled vehicle such as a motorcycle in addition to a four-wheeled vehicle such as a passenger car,
  • FIG. 1 is a half sectional view of a pneumatic tire having a SWOT structure according to an embodiment.
  • FIG. 2 is a half sectional view of a pneumatic tire having a TOS structure according to an embodiment.
  • FIG. 3 is a schematic view showing a method for measuring the electrical resistance of a tire.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)

Abstract

L'invention concerne un pneumatique gonflable qui peut être fabriqué selon un procédé classique ne nécessitant pas d'étape de fabrication de pneumatique spécifique ni d'ajout d'éléments matériels et d'étapes de processus. Ledit pneumatique gonflable présente d'excellentes propriétés de résistance au roulement et d'excellentes propriétés à l'état humide ainsi qu'une conductivité électrique. Le pneumatique gonflable comprend un protecteur de jante (19) doté d'une partie talon (16) en contact avec le protecteur de jante (19), la partie de paroi latérale (16) s'étendant à l'extérieur dans le sens du rayon du pneumatique à partir de la partie talon (11), ce qui crée une région de bord de contact de base de la bande de roulement (13). Ledit pneumatique gonflable est caractérisé en ce que, sur la circonférence des parties latérales unilatérales ou ambilatérales du pneumatique (10), le protecteur de jante (19) et la partie de la paroi latérale (16) se présentent sous la forme d'un passage conducteur de courant électrique continu grâce à l'utilisation d'un matériau en caoutchouc conducteur, et qu'un passage électroconducteur est utilisé comme passage d'énergisation du pneumatique (10) et qu'un matériau sélectionné parmi des matériaux en caoutchouc conducteur et en caoutchouc non conducteur est utilisé dans des éléments différents du passage d'énergisation.
PCT/JP2007/065423 2006-09-27 2007-08-07 Pneumatique gonflable WO2008038463A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2006-263448 2006-09-27
JP2006263448A JP2009292162A (ja) 2006-09-27 2006-09-27 空気入りタイヤ

Publications (1)

Publication Number Publication Date
WO2008038463A1 true WO2008038463A1 (fr) 2008-04-03

Family

ID=39229903

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2007/065423 WO2008038463A1 (fr) 2006-09-27 2007-08-07 Pneumatique gonflable

Country Status (2)

Country Link
JP (1) JP2009292162A (fr)
WO (1) WO2008038463A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110582415A (zh) * 2017-05-02 2019-12-17 米其林集团总公司 用于重型土木工程车辆的轮胎的导电性胎冠结构

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6476668B2 (ja) * 2014-09-05 2019-03-06 横浜ゴム株式会社 空気入りタイヤ

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11254924A (ja) * 1998-03-13 1999-09-21 Toyo Tire & Rubber Co Ltd 空気入りタイヤ
JP2000190709A (ja) * 1998-12-25 2000-07-11 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2001233994A (ja) * 2000-02-24 2001-08-28 Bridgestone Corp 空気入りタイヤ
JP2002060549A (ja) * 1999-07-13 2002-02-26 Bridgestone Corp ゴム組成物及びそれを用いた空気入りタイヤ
JP2003246888A (ja) * 2002-02-25 2003-09-05 Bridgestone Corp 導電性ゴム部材及びそれを用いた空気入りタイヤ
JP2007008269A (ja) * 2005-06-29 2007-01-18 Sumitomo Rubber Ind Ltd タイヤ
JP2007176437A (ja) * 2005-12-28 2007-07-12 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007245918A (ja) * 2006-03-16 2007-09-27 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007276570A (ja) * 2006-04-04 2007-10-25 Sumitomo Rubber Ind Ltd 空気入りタイヤ

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11254924A (ja) * 1998-03-13 1999-09-21 Toyo Tire & Rubber Co Ltd 空気入りタイヤ
JP2000190709A (ja) * 1998-12-25 2000-07-11 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2002060549A (ja) * 1999-07-13 2002-02-26 Bridgestone Corp ゴム組成物及びそれを用いた空気入りタイヤ
JP2001233994A (ja) * 2000-02-24 2001-08-28 Bridgestone Corp 空気入りタイヤ
JP2003246888A (ja) * 2002-02-25 2003-09-05 Bridgestone Corp 導電性ゴム部材及びそれを用いた空気入りタイヤ
JP2007008269A (ja) * 2005-06-29 2007-01-18 Sumitomo Rubber Ind Ltd タイヤ
JP2007176437A (ja) * 2005-12-28 2007-07-12 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007245918A (ja) * 2006-03-16 2007-09-27 Sumitomo Rubber Ind Ltd 空気入りタイヤ
JP2007276570A (ja) * 2006-04-04 2007-10-25 Sumitomo Rubber Ind Ltd 空気入りタイヤ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110582415A (zh) * 2017-05-02 2019-12-17 米其林集团总公司 用于重型土木工程车辆的轮胎的导电性胎冠结构
CN110582415B (zh) * 2017-05-02 2021-07-09 米其林集团总公司 用于重型土木工程车辆的轮胎的导电性胎冠结构

Also Published As

Publication number Publication date
JP2009292162A (ja) 2009-12-17

Similar Documents

Publication Publication Date Title
JP5172686B2 (ja) 空気入りタイヤ
JP4996613B2 (ja) 空気入りタイヤ
JP5160432B2 (ja) 空気入りタイヤ
JP4755255B2 (ja) 空気入りタイヤ
JP5259337B2 (ja) 空気入りタイヤ
JP5295711B2 (ja) 空気入りタイヤ
JP6130205B2 (ja) 空気入りタイヤ
JP5570488B2 (ja) 空気入りタイヤ
US9333812B2 (en) Pneumatic tire with tread having cap portion, base portion and conductive portion
WO2013121659A1 (fr) Pneumatique
CN106573509A (zh) 充气轮胎
JP3898316B2 (ja) 空気入りタイヤ
JP5259332B2 (ja) 空気入りタイヤ
JP2000085316A (ja) 空気入りタイヤ
WO2008038463A1 (fr) Pneumatique gonflable
JP4977144B2 (ja) 空気入りタイヤの装着方法
JP2014201281A (ja) 空気入りタイヤ

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 07792092

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 155/CHENP/2009

Country of ref document: IN

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 07792092

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP