ゴムの耐屈曲性に関する研究室評価方法およびそれに及ぼす諸因子の影響

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タイトル別名
  • EVALUATION OF VALIDITY OF NEW TYPE OF FLEX CRACKING TEST AND EFFECT OF SOME EXTERNAL FCATORS.
  • ゴム ノ タイクッキョクセイ ニ カンスル ケンキュウシツ ヒョウカ ホウホウ オヨビ ソレニ オヨボス ショ インシ ノ エイキョウ

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抄録

To evaluate the groove cracking resistance of the tire tread compound in the laboratory, A. S. T. M. D-813 or its modified methods, in general, have been employed.<br>But it is said that the laboratory test results are poorly reproducible and rarely agree with practical experience.<br>In order to improve the correlation between the laboratory data and the actual road test results, we carried out the experiment, using the modified W. Kern method.<br>By applying this new method to the tread compounds including N. R, SBR, Polybutadiene, and Cis 1.4 Polyisoprene respectively, we obtained laboratory results better reproducible and agreeable with road service performance than by A. S. T. M. method.<br>Next, the research for testing the effect of ozone, ambient temperature and flexing speed on the groove cracking resistance of variable polymer was carried out, using three typical method, i. e. crack initiation, cut growth, and crack formation (W. Kern′s) methods. Increase of flexing speed from 300r.p.m to 600r.p.m led to slight decrease of the rate of crack growth and formation.<br>Finally, the experiment for testing the effect of typical antioxidants and antiozonants in the natural rubber tread compounds with three method was carried out.

収録刊行物

  • 日本ゴム協会誌

    日本ゴム協会誌 35 (10), 738-745, 1962

    一般社団法人 日本ゴム協会

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