ENDURANCE TEST METHOD FOR TIRE

Japanese Patent JP2015141154

A

PROBLEM TO BE SOLVED: To provide an estimation method of a block breakage due to a sipe of a tire.SOLUTION: This endurance test method includes: a deterioration step of deteriorating a tire whose tread surface is formed with a sipe; a travelling step of causing the tire subjected to this deterioration step to travel; and an observation step of observing the generation of a crack of the sipe of the tire subjected to the travelling step. In this deterioration step, the tire is exposed to the atmosphere of 70°C or more and 100°C or less for the period of two days or more and 14 days less. In this travelling step, the air is filled with normal inner pressure, and a predetermined load of 0.6 times or more and 0.8 times less of the standard maximum load F is added to the tire, and a predetermined slip angle of 1° or more and less 4° is imparted to the tire, and the tire is made to travel at a speed of 50 km/h or more and less 70 km/h. In this observation step, whether or not a crack occurs in the sipe is observed.

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SARASHI HIROTAKA

JP2014015351A

August 03, 2015

January 30, 2014

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SUMITOMO RUBBER IND

G01M17/02; B60C11/12; B60C19/00

Kengo Oka
Sumitomo Norio
Kuroyoshi Murohashi
Hiroshi Kasakawa
Kei Someya
Yukari Imamura

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