English Abstract

Variation of the States of Rubber
4. Aging of Tire Parts in the Field: 1. Passenger Car Tires

Asahiro AHAGON
Retired from Yokohama Rubber Co., Ltd.
Nippon Gomu Kyokaishi,(2016),89(11),336-340 General Review in Japanese

The log λb vs. log M100 mapping, using the relation λb M100-0.75 as a reference, which held for the change caused by crosslinking, has been found effective to classify the tensile property changes due to aging under various laboratory conditions. The method was now applied for the rubber parts of PCR tires used in the field. Four types of change patterns, as found in the laboratory, were also found in tire aging. Although the aging conditions in tire agreed with those of laboratory in some cases, other cases also appeared to exist. The reasons were discussed by means of special condition added to the tire parts during field use.

Keywords: Aging, Tire, Rubber Parts, Field Usage