TIRE

• Main Author: YAJIMA RYO
• Format: Patent
• Language: English; Japanese
• Published: 13.03.2024
• Subjects: CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; DEVICES OR ARRANGEMENTS RELATED TO TYRES; METALLURGY; ORGANIC MACROMOLECULAR COMPOUNDS; PERFORMING OPERATIONS; REPAIRING, OR CONNECTING VALVES TO, INFLATABLE ELASTIC BODIESIN GENERAL; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; TYRE CHANGING OR REPAIRING; TYRE INFLATION; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; VEHICLE TYRES; VEHICLES IN GENERAL

To provide a tire whose steering stability on a wet road surface can be maintained over the long term.SOLUTION: The tire comprises a tread part having at least one rubber layer and a side wall. The tread part and the side wall are constituted of rubber compositions containing rubber components and plant oil respectively. When an average value of contents of the plant oil with respect to 100 mass parts of rubber components of tread rubber constituting the tread part is defined as S1 (mass parts) and contents of the plant oil with respect to 100 mass% of the rubber compositions constituting the side wall are defined as S2 (mass parts), a ratio of S1/S2 is over 1.0. When complex elastic modulus at 30°C of a cap rubber layer constituting a tread surface is defined as 30°CE*C(MPa) and complex elastic modulus at 70°C of the rubber compositions constituting the side wall is defined 70°CE*SW(MPa), 30°CE*C-70°CE*SW is equal to 3.0 MPa or less.SELECTED DRAWING: None 【課題】タイヤの長期にわたるウェット路面での操縦安定性能の維持を図ること。【解決手段】少なくとも１つのゴム層を有するトレッド部、およびサイドウォールを備えたタイヤであって、前記トレッド部および前記サイドウォールが、それぞれゴム成分および植物油を含有するゴム組成物により構成され、前記トレッド部を構成するトレッドゴムのゴム成分１００質量部に対する植物油の含有量の平均値をＳ１（質量部）、前記サイドウォールを構成するゴム組成物のゴム成分１００質量部に対する植物油の含有量をＳ２（質量部）としたとき、Ｓ１／Ｓ２が１．０超であり、トレッド面を構成するキャップゴム層の３０℃における複素弾性率を３０℃Ｅ＊C（ＭＰａ）、前記サイドウォールを構成するゴム組成物の７０℃における複素弾性率を７０℃Ｅ＊SW（ＭＰａ）としたとき、３０℃Ｅ＊C－７０℃Ｅ＊SWが３．０ＭＰａ以下であるタイヤ。【選択図】なし