WO2006098407A1 - 空気入りタイヤ - Google Patents
空気入りタイヤ Download PDFInfo
- Publication number
- WO2006098407A1 WO2006098407A1 PCT/JP2006/305256 JP2006305256W WO2006098407A1 WO 2006098407 A1 WO2006098407 A1 WO 2006098407A1 JP 2006305256 W JP2006305256 W JP 2006305256W WO 2006098407 A1 WO2006098407 A1 WO 2006098407A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- tread
- rubber
- foamed rubber
- conductive layer
- pneumatic tire
- Prior art date
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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/03—Tread patterns
-
- 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
- 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
- B60C11/00—Tyre tread bands; Tread patterns; Anti-skid inserts
- B60C11/0041—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers
- B60C11/005—Tyre tread bands; Tread patterns; Anti-skid inserts comprising different tread rubber layers with cap and base layers
-
- 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
- B60C11/14—Anti-skid inserts, e.g. vulcanised into the tread band
- B60C2011/147—Foamed rubber or sponge rubber on the tread band
Definitions
- the present invention relates to a pneumatic tire in which a conductive rubber layer is disposed mainly on a part of a tread portion having foamed rubber strength.
- a foamed rubber is sometimes used as a tread rubber (see Patent Document 1 below).
- a filler may be blended.
- a highly conductive rubber that acts as a ground against static electricity accumulated in the tire is thinly disposed in the tread portion (see Patent Document 2 below).
- a so-called non-foamed rubber having a foaming rate of less than 2% was used as the conductive rubber.
- Patent Document 1 Japanese Patent Laid-Open No. 62-283001
- Patent Document 2 Japanese Patent Laid-Open No. 10-81110
- non-foamed rubber generally has higher wear resistance than foamed rubber, as described above, when non-foamed rubber is used for conductive rubber, the tread portion wears. Among them, there was a problem that only the conductive rubber portion remained and uneven wear occurred between the rubber foam. Disclosure of the invention
- an object of the present invention is to improve uneven wear resistance of a tread portion in a pneumatic tire in which a conductive rubber layer is arranged on a part of the tread portion.
- the invention of claim 1 is a pneumatic tire in which a foam rubber is disposed in a tread portion, and the foam tread portion has a volume resistivity of 10 1Q ⁇ ⁇ cm or less and no white filler is blended therein. It is characterized by a partial arrangement of the layers.
- volume resistivity of the foamed rubber conductive layer exceeds 10 1Q Q 'cm, the static electricity charged on the tire cannot be sufficiently discharged to the ground road surface, so the volume resistivity of the foamed rubber conductive layer is 10 1Q Q 'cm or less is preferable.
- the foaming ratio of the foamed rubber conductive layer is, for example, 2% or more.
- the invention of claim 2 is the pneumatic tire according to claim 1, wherein the foaming ratio of the foamed rubber conductive layer is equal to or greater than the foaming ratio of the foamed rubber.
- the conductive rubber compounded with the carbon filler has higher wear resistance than the tread rubber compounded with the white filler, but in the pneumatic tire according to claim 2, the foamed rubber conductive layer Since the foaming rate of the foamed rubber is set to be relatively higher than the foaming rate of the foamed rubber, uneven wear caused by a difference in wear resistance between the foamed rubber conductive layer and other tread rubbers can be suppressed. .
- the invention of claim 3 is the pneumatic tire according to claim 1 or claim 2, wherein the foamed rubber conductive layer has a strip shape extending in the tire circumferential direction.
- the invention of claim 4 is the pneumatic tire according to any one of claims 1 to 3.
- the tread portion has a cap-base structure having a cap portion on the outer side in the tire radial direction and a base portion on the inner side in the tire radial direction, a non-foamed rubber is disposed on the base portion, and the foamed rubber
- the conductive layer is provided on the cap portion and is in contact with the base portion.
- cap-base structure when foamed rubber with low conductivity is arranged in the cap part and non-foamed rubber with high conductivity (for example, containing carbon filler) is arranged in the base part, Static electricity charged in the lower layer of the tread part (center side in the tire radial direction) flows to the base part, but there is a cap part with low conductivity in the upper layer of the base part (outer side in the tire radial direction). , It cannot flow to the tread surface and is not discharged to the ground.
- foamed rubber with low conductivity for example, containing carbon filler
- the foamed rubber conductive layer is disposed in the cap portion and the foamed rubber conductive layer is in contact with the base portion, static electricity charged inside the tire is prevented.
- the base force can also flow through the foamed rubber conductive layer to the tread tread and be discharged to the grounding surface.
- the invention according to claim 5 is the pneumatic tire according to claim 4, wherein the foamed rubber conductive layer is directed toward the tread tread from the base portion with respect to the normal direction of the tread tread. It is characterized by being arranged to incline in the tire width direction! /
- the foamed rubber conductive layer force in the tread portion is arranged not to be parallel to the normal direction of the tread surface but to be inclined in the tire width direction.
- the foam rubber conductive layer strength in the tread occupies a certain width in the tire width direction in plan view of the tread surface, and wear resistance between the foam rubber conductive layer and other tread rubbers in the tread part. It is possible to suppress uneven wear caused by the difference.
- the invention's effect is arranged not to be parallel to the normal direction of the tread surface but to be inclined in the tire width direction.
- the uneven wear resistance of the tread portion can be improved over the pneumatic tire in which the conductive rubber is arranged in a part of the tread portion. It has the excellent effect of being able to
- FIG. 1 is a cross-sectional view of a pneumatic tire in which a foamed rubber conductive layer is arranged in the tire radial direction.
- FIG. 2 is a cross-sectional view of a pneumatic tire in which a foamed rubber conductive layer is disposed to be inclined with respect to the tire radial direction.
- the tread portion 12 of the pneumatic tire 10 according to the present embodiment shown in FIG. 1 is a so-called cap in which a cap portion 16 on the tread tread 12A side is overlaid on the outer periphery of a base portion 18 on the inner side in the tire radial direction. ⁇ A base structure is formed, and non-foamed rubber is placed on the base 18.
- the cap portion 16 for example, foamed rubber in which 50 parts by weight or more of a white filler is blended with 100 parts by weight of a rubber component of foamed rubber having a foaming ratio of 2% or more is disposed. It is not limited to the power that can use 90% or more of white filler in the total amount of filler. Examples of white fillers include silica and hydroxyaluminum.
- the cap part 16 has lower conductivity than rubber with a white filler content of 50 parts by weight or less.
- the base portion 18 is made of non-foamed rubber, it has higher rigidity than the cap portion 16, and since a strong bon filler is blended, the conductivity is high.
- the cap portion 16 is provided with a foamed rubber conductive layer 14 having a volume resistivity of 10 ⁇ 'cm or less and containing no white filler.
- the foamed rubber conductive layer 14 is mixed with, for example, a carbon filler so as to reduce the volume resistivity.
- the volume resistivity of the foamed rubber conductive layer 14 is set to 10 ⁇ 'cm or less. If the volume resistivity is exceeded, static electricity charged in the pneumatic tire 10 is grounded on the grounding road surface (not shown). This is the force that makes it impossible to fully discharge.
- the foaming ratio of the foamed rubber conductive layer 14 is 2% or more, and is equal to or greater than the foaming ratio of the tread rubber 22 (foamed rubber) constituting the cap part 16 excluding the foamed rubber conductive layer 14. . Specifically, the expansion ratio of the tread rubber 22 is 23%, while the expansion ratio of the foamed rubber conductive layer 14 is 28%.
- the foamed rubber conductive layer 14 is provided in the cap portion 16 at the tire center CL in the normal direction of the tread surface 12A and continuously in the tire circumferential direction.
- Foam rubber The conductive layer 14 is provided so that the inner side in the tire radial direction is in contact with the base 18 and the outer side in the tire radial direction is exposed to the tread surface 12A.
- the width of the foamed rubber conductive layer 14 in the tire axial direction is formed thin, and the width is preferably 0.5 to 3. Omm. Further, the arrangement of the foamed rubber conductive layer 14 is not limited to this, and the foamed rubber conductive layer 14 may be provided intermittently in the tire circumferential direction as well as the tire center CL.
- Components of the foam rubber used in the tread portion 12 including the foam rubber conductive layer 14 include polymers having a glass transition temperature of 60 ° C or lower, such as natural rubber, polyisoprene rubber, polybutadiene rubber, and butyl rubber. And a mixture of two or more of these polymers, or a mixture of 40 parts by weight or less of styrene-butadiene rubber having a styrene content of 30% or less. By using these polymers, the tread portion 12 can maintain sufficient rubber elasticity even at low temperatures.
- the average cell diameter of the closed cells of the foamed rubber is preferably 1 to 120 ⁇ m, more preferably 10 to 120 ⁇ m.
- the average cell diameter of the closed cells of the foamed rubber is less than 1 ⁇ m, the flexibility of the foamed rubber at low temperatures or the effect of eliminating the water film between the tread and the road surface cannot be obtained!
- the average bubble diameter exceeds 120 m, the wear resistance is lowered, and further, the strain restoring force of the foamed rubber is lowered, so that the so-called sag resistance is deteriorated. Even during manufacturing, it is difficult to obtain a stable shape due to a decrease in permanent setability.
- the expansion ratio of the foamed rubber is preferably in the range of 1 to 50%, more preferably 2 to 50%. If the foaming ratio of the foamed rubber is less than 1%, the effect of improving the performance on ice cannot be obtained, and if it exceeds 50%, the wear resistance performance is lowered, and further, the strain restoring force of the foamed rubber is lowered. Further, in addition to the reduction in the sag resistance, it is difficult to obtain a stable shape at the time of production.
- foamed rubber is disposed on the tread rubber 22 of the tread portion 12, and the foamed rubber conductive layer 14 using foamed rubber is disposed on a part of the tread portion 12.
- the uneven wear of the tread portion 12 which has been a problem when using non-foamed rubber for the rubber is suppressed.
- a conductive rubber compounded with a carbon filler is more white.
- the foaming rate of the foamed rubber conductive layer 14 is set to be relatively high with respect to the tread rubber 22, so that the foamed rubber conductive layer Uneven wear caused by the difference in wear resistance between 14 and other tread rubbers 22 can be suppressed.
- cap-base structure when foamed rubber having low conductivity is arranged in the cap portion 16, and non-foamed rubber having high conductivity (for example, containing a carbon filler) is arranged in the base portion 18, Static electricity charged in the lower layer of the tread portion 12 (center side in the tire radial direction) flows up to the base portion 18, but the upper portion of the base portion 18 (outer circumferential side in the tire radial direction) has a low conductivity and cap portion. Since 16 exists, it cannot flow to tread tread 12A and is not discharged to the ground surface.
- non-foamed rubber having high conductivity for example, containing a carbon filler
- the foamed rubber conductive layer 14 is in contact with the highly conductive base 18 and exposed to the tread tread 12A, a discharge path is secured, and the inside of the tire is secured.
- the charged static electricity can flow from the base 18 through the foamed rubber conductive layer 14 to the tread tread 12A and can be discharged to the grounding surface.
- the foamed rubber conductive layer 14 is directed from the base portion 18 toward the tread tread 12A in the tire width direction with respect to the normal direction of the tread tread 12A. It is arranged to be inclined.
- the foamed rubber conductive layer 14 force in the tread portion 12 is arranged so as to incline in the tire width direction from the base portion 18 toward the tread tread surface 12A, not parallel to the normal direction of the tread tread surface 12A. Is done. As a result, the foamed rubber conductive layer 14 occupies a certain width in the tire width direction in the tread portion 12 in the plan view of the tread tread 12A. Uneven wear caused by the difference in wear resistance can be suppressed.
- the electrostatic discharge action is the same as in the first embodiment. (Test example)
- the basic structure of the pneumatic tire is as shown in Fig. 1.
- the tire size is 195Z65R 15, the rim used is 6J-15, and the internal pressure is 210 kPa for both the front and rear wheels.
- the volume resistivity was evaluated by measuring the volume resistivity as a tire at three locations on the tire circumference and measuring the maximum value.
- the uneven wear level is determined by measuring the level difference between the foamed rubber conductive layer and the tread rubber on both sides of the tire at 9 locations on the tire circumference after installing a pneumatic tire on a real vehicle and running 1,00 Okm. evaluated.
- the foaming rate of the conductive rubber is set relatively higher than that of the other tread rubber.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/886,476 US20080142130A1 (en) | 2005-03-16 | 2006-03-16 | Pneumatic Tire |
JP2007508210A JP4673365B2 (ja) | 2005-03-16 | 2006-03-16 | 空気入りタイヤ |
DE602006009085T DE602006009085D1 (de) | 2005-03-16 | 2006-03-16 | Luftreifen |
EP06729249A EP1859966B1 (en) | 2005-03-16 | 2006-03-16 | Pneumatic tire |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005075643 | 2005-03-16 | ||
JP2005-075643 | 2005-03-16 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2006098407A1 true WO2006098407A1 (ja) | 2006-09-21 |
Family
ID=36991750
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2006/305256 WO2006098407A1 (ja) | 2005-03-16 | 2006-03-16 | 空気入りタイヤ |
Country Status (8)
Country | Link |
---|---|
US (1) | US20080142130A1 (ja) |
EP (1) | EP1859966B1 (ja) |
JP (1) | JP4673365B2 (ja) |
KR (1) | KR20070110556A (ja) |
CN (1) | CN100564078C (ja) |
DE (1) | DE602006009085D1 (ja) |
RU (1) | RU2381911C2 (ja) |
WO (1) | WO2006098407A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013107637A (ja) * | 2011-11-22 | 2013-06-06 | Goodyear Tire & Rubber Co:The | 剛性が強化されたトレッド |
US11453255B2 (en) | 2014-09-05 | 2022-09-27 | The Yokohama Rubber Co., Ltd. | Pneumatic tire with electrically conductive rubber within rim cushion rubber |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
USD608724S1 (en) | 2009-03-16 | 2010-01-26 | Trek Bicycle Corporation | Bicycle tire tread |
WO2015094831A1 (en) * | 2013-12-19 | 2015-06-25 | Bridgestone Americas Tire Operations, Llc | Tire having static charge dissipation element |
US20230391146A1 (en) * | 2022-06-07 | 2023-12-07 | The Goodyear Tire & Rubber Company | Tire with a conductive tread chimney component |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62283001A (ja) | 1985-04-02 | 1987-12-08 | Bridgestone Corp | 空気入りタイヤ |
JPH1081110A (ja) | 1996-07-18 | 1998-03-31 | Bridgestone Corp | 空気入りタイヤ |
JPH11129713A (ja) * | 1997-10-31 | 1999-05-18 | Bridgestone Corp | 空気入りタイヤ |
JP2002210843A (ja) * | 2001-01-23 | 2002-07-31 | Sumitomo Rubber Ind Ltd | 空気入りタイヤの製造方法、及びそれによって製造された空気入りタイヤ。 |
JP2004306769A (ja) * | 2003-04-07 | 2004-11-04 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4249588A (en) * | 1978-04-27 | 1981-02-10 | The Goodyear Tire & Rubber Company | Pneumatic tire |
US5351734A (en) * | 1986-02-05 | 1994-10-04 | Bridgestone Corporation | Pneumatic tire with foam rubber in the tread |
DE3703480A1 (de) * | 1986-02-05 | 1987-08-06 | Bridgestone Corp | Luftreifen |
JP3360921B2 (ja) * | 1994-03-25 | 2003-01-07 | 株式会社ブリヂストン | 空気入りタイヤ |
GB9409453D0 (en) * | 1994-05-12 | 1994-06-29 | Sumitomo Rubber Ind | tyre tread and tyres incorporating them |
DE59600109D1 (de) * | 1996-03-29 | 1998-04-09 | Continental Ag | Fahrzeugluftreifen |
US6415833B1 (en) * | 1996-07-18 | 2002-07-09 | Bridgestone Corporation | Pneumatic tire having electrically conductive rubber layer in land portion defined between circumferential grooves |
EP0847880B1 (en) * | 1996-10-17 | 2002-12-18 | Sumitomo Rubber Industries Limited | Pneumatic tyre |
DE19644538C1 (de) * | 1996-10-26 | 1998-09-03 | Continental Ag | Fahrzeugluftreifen |
JPH1148711A (ja) * | 1997-08-07 | 1999-02-23 | Bridgestone Corp | 空気入りタイヤ |
JP2000085316A (ja) * | 1998-09-14 | 2000-03-28 | Bridgestone Corp | 空気入りタイヤ |
JP2002096402A (ja) * | 2000-07-19 | 2002-04-02 | Bridgestone Corp | タイヤ用トレッドの製造方法 |
RU2286255C2 (ru) * | 2001-05-16 | 2006-10-27 | Сосьете Де Текноложи Мишлен | Устройство для соэкструзии резиновых смесей |
DE60233155D1 (de) * | 2001-09-28 | 2009-09-10 | Bridgestone Corp | Kautschukzusammensetzung, pneumatischer reifen und verfahren zur herstellung des pneumatischen reifens |
-
2006
- 2006-03-16 US US11/886,476 patent/US20080142130A1/en not_active Abandoned
- 2006-03-16 EP EP06729249A patent/EP1859966B1/en not_active Expired - Fee Related
- 2006-03-16 KR KR1020077023566A patent/KR20070110556A/ko not_active Application Discontinuation
- 2006-03-16 CN CNB2006800082217A patent/CN100564078C/zh not_active Expired - Fee Related
- 2006-03-16 WO PCT/JP2006/305256 patent/WO2006098407A1/ja active Application Filing
- 2006-03-16 JP JP2007508210A patent/JP4673365B2/ja not_active Expired - Fee Related
- 2006-03-16 RU RU2007138306/11A patent/RU2381911C2/ru not_active IP Right Cessation
- 2006-03-16 DE DE602006009085T patent/DE602006009085D1/de active Active
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62283001A (ja) | 1985-04-02 | 1987-12-08 | Bridgestone Corp | 空気入りタイヤ |
JPH1081110A (ja) | 1996-07-18 | 1998-03-31 | Bridgestone Corp | 空気入りタイヤ |
JPH11129713A (ja) * | 1997-10-31 | 1999-05-18 | Bridgestone Corp | 空気入りタイヤ |
JP2002210843A (ja) * | 2001-01-23 | 2002-07-31 | Sumitomo Rubber Ind Ltd | 空気入りタイヤの製造方法、及びそれによって製造された空気入りタイヤ。 |
JP2004306769A (ja) * | 2003-04-07 | 2004-11-04 | Toyo Tire & Rubber Co Ltd | 空気入りタイヤ |
Non-Patent Citations (1)
Title |
---|
See also references of EP1859966A4 * |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013107637A (ja) * | 2011-11-22 | 2013-06-06 | Goodyear Tire & Rubber Co:The | 剛性が強化されたトレッド |
US11453255B2 (en) | 2014-09-05 | 2022-09-27 | The Yokohama Rubber Co., Ltd. | Pneumatic tire with electrically conductive rubber within rim cushion rubber |
Also Published As
Publication number | Publication date |
---|---|
CN101142099A (zh) | 2008-03-12 |
EP1859966A4 (en) | 2008-11-19 |
EP1859966B1 (en) | 2009-09-09 |
RU2381911C2 (ru) | 2010-02-20 |
RU2007138306A (ru) | 2009-04-27 |
US20080142130A1 (en) | 2008-06-19 |
KR20070110556A (ko) | 2007-11-19 |
JP4673365B2 (ja) | 2011-04-20 |
EP1859966A1 (en) | 2007-11-28 |
CN100564078C (zh) | 2009-12-02 |
DE602006009085D1 (de) | 2009-10-22 |
JPWO2006098407A1 (ja) | 2008-08-28 |
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