PNEUMATIC TIRE

• Main Authors: INOUE YUKINO, HASHIBA TOSHIFUMI, TANAKA TAKEHIRO, FUSHIHARA KAZUHISA, SAKAGUCHI YUMI
• Format: Patent
• Language: English; Japanese
• Published: 03.12.2020
• 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 pneumatic tire having excellent tire performance such as low fuel consumption, wear resistance, wet grip performance, performance on snow and ice, puncture resistance, flex cracking growth resistance and the like.SOLUTION: A heavy load tire comprising a rubber composition that has a tread prepared with a rubber composition containing a natural rubber derived from Russian dandelion having a weight-average molecular weight Mw measured by FFF-MALS of 5,000,000 or larger and a radius of gyration Rz of a polymer of 130 nm or larger, and carbon black, in which a content of the Russian dandelion-derived natural rubber in 100 mass% of the rubber component is 1 mass% or larger, and a content of the carbon black relative to 100 pts.mass of the rubber component is 30 pts.mass or larger.SELECTED DRAWING: None 【課題】低燃費性、耐摩耗性、ウェットグリップ性能、雪氷上性能、耐破壊性能、耐屈曲亀裂成長性等のタイヤ性能に優れた空気入りタイヤを提供する。【解決手段】ＦＦＦ−ＭＡＬＳによって測定される重量平均分子量Ｍｗが５００万以上でかつ、ポリマーの回転半径Ｒｚが１３０ｎｍ以上であるロシアタンポポ由来天然ゴムと、カーボンブラックとを含むゴム組成物を用いて作製したトレッドを有し、前記ゴム組成物は、ゴム成分１００質量％中の前記ロシアタンポポ由来天然ゴムの含有量が１質量％以上であり、前記ゴム成分１００質量部に対する前記カーボンブラックの含有量が３０質量部以上である重荷重用タイヤ。【選択図】なし