PNEUMATIC TIRE

• Main Author: TSUCHIYA SHUJI
• Format: Patent
• Language: English; Japanese
• Published: 28.05.2020
• 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 that enhances crack resistance and lower rolling resistance equal to or beyond conventional levels.SOLUTION: The degree of swelling A and a tan δ at 60°C of a side rubber 8 constituting a sidewall portion 2 satisfy the following expression (1). 0.0006A-0.083≤tan δ≤0.0006A-0.038...(1) (where tan δ is tan δ at 60°C, and "A" is the degree of swelling (%) when immersed in toluene at room temperature for three days and satisfies 220≤A≤340.)SELECTED DRAWING: Figure 1 【課題】耐クラック性および低転がり抵抗性を従来レベル以上に改良するようにした空気入りタイヤを提供する。【解決手段】サイドウォール部２を構成するサイドゴム８の膨潤度Ａおよび６０℃のｔａｎδが、下記式（１）を満たすことを特徴とする。０．０００６Ａ−０．０８３≦ｔａｎδ≦０．０００６Ａ−０．０３８ ・・・（１）（式中、ｔａｎδは６０℃のｔａｎδ、Ａは室温で３日間トルエンに浸漬したときの膨潤度（％）で２２０≦Ａ≦３４０である。）【選択図】図１