WO2004071789A1 - 乗用車用空気入りラジアルタイヤ - Google Patents
乗用車用空気入りラジアルタイヤ Download PDFInfo
- Publication number
- WO2004071789A1 WO2004071789A1 PCT/JP2004/001460 JP2004001460W WO2004071789A1 WO 2004071789 A1 WO2004071789 A1 WO 2004071789A1 JP 2004001460 W JP2004001460 W JP 2004001460W WO 2004071789 A1 WO2004071789 A1 WO 2004071789A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- aromatic polyamide
- polyamide fiber
- tire
- belt
- layer
- 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
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/18—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers
- B60C9/20—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel
- B60C9/22—Structure or arrangement of belts or breakers, crown-reinforcing or cushioning layers built-up from rubberised plies each having all cords arranged substantially parallel the plies being arranged with all cords disposed along the circumference of the tyre
Definitions
- the present invention relates to a pneumatic radial tire for a passenger vehicle, and more particularly, to a pneumatic radial tire for a passenger vehicle in which road noise is reduced.
- the pneumatic radial tire has a belt layer having a predetermined cord angle with respect to the tire circumferential direction on the outer peripheral side of the carcass layer in the tread portion, but the edge portion of the belt layer caused by centrifugal force during high-speed running.
- a belt cover layer formed by winding a nylon cord substantially in the tire circumferential direction is generally provided on the outer peripheral side of the belt layer.
- An object of the present invention is to provide a pneumatic radial tire for a passenger car capable of effectively reducing road noise by specifying the material properties and structure of a belt cover layer made of an aromatic polyamide fiber cord. It is in.
- a pneumatic radial tire for a passenger car has a belt cover layer made of an aromatic polyamide fiber cord disposed on an outer peripheral side of a belt layer, and the aromatic polyamide fiber cord is arranged in a tire circumferential direction.
- the aromatic polyamide fiber cord The intermediate elongation under a 67 N load is 2.0 to 2.7%, and the driving density of the aromatic polyamide fiber cord in one layer of the belt cover is 36 to 54 strands / 50 mm. It is characterized by the following.
- the present inventor has found that it is effective to increase the peripheral rigidity at the edge of the belt layer in order to improve the road noise, and to increase the peripheral rigidity in the edge, it is necessary to provide a single layer of highly elastic belt cover.
- the inventors have found that they are effective, and have reached the present invention.
- the circumferential rigidity at the edge portion of the belt layer is increased, and the road noise is effectively reduced. Can be. Moreover, when the above-described belt cover layer is employed, no vulcanization failure due to the belt cover layer occurs during tire production.
- the amount of shrinkage of the aromatic polyamide fiber cord that occurs when the aromatic polyamide fiber cord is collected from the tire is 2.5% of the length before collection at a position corresponding to the center of the belt layer.
- the length is preferably 0.5% or more of the length before sampling.
- FIG. 1 is a meridional half-sectional view showing a pneumatic radial tire for a passenger car according to an embodiment of the present invention.
- FIG. 2 is an exploded view of the pneumatic radial tire for a passenger car shown in FIG.
- FIGS. 1 and 2 show a pneumatic radial tire for a passenger car according to an embodiment of the present invention.
- 1 is a tread portion
- 2 is a sidewall portion
- 3 is a bead portion.
- a carcass layer 4 is mounted between the pair of left and right bead portions 3, 3, and the end in the width direction of the carcass layer 4 is wound around the bead core 5 from the inside of the tire to the outside.
- the carcass layer 4 includes a plurality of codes extending in the tire radial direction. I have.
- belt layers 6, 6 are buried on the outer peripheral side of the force-cast layer 4 in the tread portion 1.
- These belt layers 6, 6 include a plurality of cords inclined at an angle of 10 to 45 degrees with respect to the tire circumferential direction, and the cords are arranged so as to cross each other between the layers.
- a belt cover layer 7 made of an aromatic polyamide fiber cord is placed on the outer peripheral side of the belt layers 6 and 6.
- the belt cover layer 7 is formed by spirally winding an aromatic polyamide fiber cord at substantially 0 degrees in the tire circumferential direction. It is desirable that the cord angle of the belt cover layer 7 with respect to the tire circumferential direction be 5 degrees or less.
- the aromatic polyamide fiber cord constituting the belt cover layer 7 has an intermediate elongation under a load of 67 N of 2.0 to 2.7% in physical properties, and the aromatic polyamide fiber cord of the belt cover layer 7 has an intermediate elongation of 2.0 to 2.7%.
- the driving density is set at 36 to 54/5 O mm in the part of the belt layer 6. This implantation density is measured in the direction perpendicular to the cord.
- the belt cover layer 7 serves to prevent the edge portions of the belt layers 6 and 6 from peeling off at the time of high-speed running, and also to suppress the generation of load noise.
- the intermediate elongation of the aromatic polyamide fiber cord is less than 2.0%, deformation of the belt cover layer 7 in the mold during tire vulcanization is restricted, which causes a vulcanization failure.
- it exceeds 2.7% the effect of reducing the load noise cannot be obtained.
- the driving density of the aromatic polyamide fiber cord in the belt cover layer 7 is less than 36/50 mm, the effect of reducing road noise cannot be obtained, and if it is more than 54/50 mm.
- deformation of the belt cover layer 7 in the mold is restricted, which causes vulcanization failure.
- the length is 2.5% or less of the length before sampling, preferably 1.5 to 2.5%, and Equivalent to the edge of layer 6
- the cord tension of the belt cover layer 7 is optimized so that it is 0.5% or more of the length before sampling, preferably 0.5 to 1.5%. Has been done.
- the cord tension of the belt cover layer 7 at the edge of the belt layer 6 is increased compared to the conventional belt tension.
- Increasing the circumferential rigidity at the edge of the layer 6 contributes to a reduction in mouth noise.
- the shrinkage of the aromatic polyamide fiber cord can be measured as follows. That is, the tread rubber is removed from the tread portion 1 to expose the belt cover layer 7, the aromatic polyamide fiber cord is peeled off from a predetermined length range of the belt cover layer 7, and the length after the collection is measured. What is necessary is just to obtain the amount of shrinkage for the length of. For example, the average value of the amount of shrinkage of the five aromatic polyamide fiber cords located at the center of the outermost belt layer 6 is determined, and the five aromatics located at the edge of the outermost belt layer 6 are obtained. It is advisable to find the average value of shrinkage for polyamide fiber cord.
- the outer peripheral surface of the tread / belt forming drum is given a curvature along the drum width direction, and the outer peripheral surface is centered in the drum width direction. It is possible to inflate the part. In this case, the circumference of the belt cover layer 7 at the position corresponding to the edge of the belt layer 6 on the drum is shortened, so that at the position after the vulcanization, the belt cover layer 7 corresponds to the edge of the belt layer 6.
- the belt tension can be further increased by 7 cord tension.
- Another method for optimizing the cord tension of the belt cover layer 7 according to the position in the tire width direction is to adjust the cord tension of the belt cover layer 7 on the tread belt forming drum according to the position in the tire width direction. It may be controlled. That is, when forming the belt cover layer 7 using a strip material containing at least one aromatic polyamide fiber cord, the tension at the time of winding the strip material around the drum is controlled according to the position in the tire width direction. .
- Each tire was mounted on a rim size 15 x 6 JJ wheel with air pressure of 200 kPa and mounted on a 2.5-liter FR passenger car.Five trained drivers were on the road noise measurement road. And performed a filling evaluation. Each driver scored a relative comparison with the reference tire (conventional tire) using the 5-point scale based on the following criteria. The evaluation results were expressed as the average score of the three people excluding the highest and lowest scores.
- the amount of shrinkage of the aromatic polyamide fiber cord generated when the aromatic polyamide fiber cord constituting the belt cover layer was collected from the tire was reduced to the center of the belt layer. At the corresponding position, it was 2.5% of the length before collection, and at the position corresponding to the edge of the belt layer, it was 0.5% of the length before collection.
- the shrinkage of the aromatic polyamide fiber cord constituting one layer of the belt cover is less than 2.5% of the length before sampling at a position corresponding to a part of the center of the belt layer, and At the position corresponding to the edge of the belt layer, the length before sampling was 0. When it was 5% or more, the effect of reducing noise was remarkably exhibited.
- the present invention can be effectively used in the tire manufacturing industry and eventually in the automobile manufacturing industry.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/541,861 US20060137796A1 (en) | 2003-02-14 | 2004-02-12 | Pneumatic radial tire for car |
EP04710499A EP1593530A1 (en) | 2003-02-14 | 2004-02-12 | Pneumatic radial tire for car |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003037084A JP2004262269A (ja) | 2003-02-14 | 2003-02-14 | 乗用車用空気入りラジアルタイヤ |
JP2003-037084 | 2004-02-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004071789A1 true WO2004071789A1 (ja) | 2004-08-26 |
Family
ID=32866346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/001460 WO2004071789A1 (ja) | 2003-02-14 | 2004-02-12 | 乗用車用空気入りラジアルタイヤ |
Country Status (5)
Country | Link |
---|---|
US (1) | US20060137796A1 (ja) |
EP (1) | EP1593530A1 (ja) |
JP (1) | JP2004262269A (ja) |
CN (1) | CN1750945A (ja) |
WO (1) | WO2004071789A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008514475A (ja) * | 2004-09-24 | 2008-05-08 | ソシエテ ド テクノロジー ミシュラン | クラウンが円周方向補強コードを備えた複数個のゾーンを有するタイヤ |
JP2011051445A (ja) * | 2009-09-01 | 2011-03-17 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080060738A1 (en) * | 2004-09-24 | 2008-03-13 | Michio Osaki | Pneumatic Radial Tire For Light Truck |
JP4184349B2 (ja) * | 2005-01-24 | 2008-11-19 | 住友ゴム工業株式会社 | ランフラットタイヤ |
WO2006134776A1 (ja) * | 2005-06-17 | 2006-12-21 | The Yokohama Rubber Co., Ltd. | 空気入りタイヤ |
JP2007326436A (ja) * | 2006-06-07 | 2007-12-20 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
JP2007326439A (ja) * | 2006-06-07 | 2007-12-20 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
US20090107609A1 (en) * | 2007-10-31 | 2009-04-30 | Walter Kevin Westgate | High Extensible Cut-Resistant Barrier |
JP6043065B2 (ja) * | 2012-01-10 | 2016-12-14 | 住友ゴム工業株式会社 | 自動二輪車用タイヤの製造方法 |
FR3009238B1 (fr) * | 2013-07-30 | 2016-10-28 | Michelin & Cie | Pneu radial a structure de ceinture allegee |
JP2019524521A (ja) * | 2016-07-01 | 2019-09-05 | コルドサ・テクニク・テクスティル・アノニム・シルケティKordsa Teknik Tekstil Anonim Sirketi | キャッププライとしての新規バイエラスティックアラミドタイヤコード |
JP7156928B2 (ja) * | 2018-12-14 | 2022-10-19 | Toyo Tire株式会社 | 空気入りタイヤ |
JP7156927B2 (ja) * | 2018-12-14 | 2022-10-19 | Toyo Tire株式会社 | 空気入りタイヤ |
DE102019208984A1 (de) * | 2019-06-19 | 2020-12-24 | Continental Reifen Deutschland Gmbh | Fahrzeugreifen mit Gürtelbandage |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02147407A (ja) * | 1988-11-30 | 1990-06-06 | Sumitomo Rubber Ind Ltd | 乗用車用ラジアルタイヤ |
JP2001180220A (ja) * | 1999-12-24 | 2001-07-03 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
JP2002059706A (ja) * | 2000-08-11 | 2002-02-26 | Bridgestone Corp | 空気入りラジアルタイヤ |
JP2002144814A (ja) * | 2000-11-09 | 2002-05-22 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
JP2003220806A (ja) * | 2002-01-31 | 2003-08-05 | Yokohama Rubber Co Ltd:The | 空気入りタイヤおよびその製造方法 |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2788655B2 (ja) * | 1989-10-13 | 1998-08-20 | 住友ゴム工業 株式会社 | 自動二輪車用タイヤ |
-
2003
- 2003-02-14 JP JP2003037084A patent/JP2004262269A/ja active Pending
-
2004
- 2004-02-12 US US10/541,861 patent/US20060137796A1/en not_active Abandoned
- 2004-02-12 EP EP04710499A patent/EP1593530A1/en not_active Withdrawn
- 2004-02-12 WO PCT/JP2004/001460 patent/WO2004071789A1/ja not_active Application Discontinuation
- 2004-02-12 CN CNA2004800041311A patent/CN1750945A/zh active Pending
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02147407A (ja) * | 1988-11-30 | 1990-06-06 | Sumitomo Rubber Ind Ltd | 乗用車用ラジアルタイヤ |
JP2001180220A (ja) * | 1999-12-24 | 2001-07-03 | Yokohama Rubber Co Ltd:The | 空気入りラジアルタイヤ |
JP2002059706A (ja) * | 2000-08-11 | 2002-02-26 | Bridgestone Corp | 空気入りラジアルタイヤ |
JP2002144814A (ja) * | 2000-11-09 | 2002-05-22 | Sumitomo Rubber Ind Ltd | 空気入りラジアルタイヤ |
JP2003220806A (ja) * | 2002-01-31 | 2003-08-05 | Yokohama Rubber Co Ltd:The | 空気入りタイヤおよびその製造方法 |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008514475A (ja) * | 2004-09-24 | 2008-05-08 | ソシエテ ド テクノロジー ミシュラン | クラウンが円周方向補強コードを備えた複数個のゾーンを有するタイヤ |
JP2011051445A (ja) * | 2009-09-01 | 2011-03-17 | Yokohama Rubber Co Ltd:The | 空気入りタイヤ |
Also Published As
Publication number | Publication date |
---|---|
CN1750945A (zh) | 2006-03-22 |
JP2004262269A (ja) | 2004-09-24 |
US20060137796A1 (en) | 2006-06-29 |
EP1593530A1 (en) | 2005-11-09 |
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