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发明授权
CN106573510B 充气轮胎 有权

充气轮胎
摘要：
本充气轮胎在侧壁部的外表面上设置有包括印刷层以及相对于印刷层分别布置在轮胎的内侧和外侧的内层和外层的装饰部。将E125’、E225’和E325’分别定义为在25℃时测量的印刷层的储能弹性模量、在25℃时测量的内层的储能弹性模量和在25℃时测量的外层的储能弹性模量，保持关系式E125’＜E225’和E125’＜E325’。将E180’、E280’和E380’分别定义为在80℃时测量的印刷层的储能弹性模量、内层的储能弹性模量和外层的储能弹性模量，并且将印刷层、内层和外层的高温储能弹性模量的变化率α1、α2和α3分别定义为α1＝|E125'‑E180'|/E125'，α2＝|E225'‑E280'|/E225'，α3＝|E325'‑E380'|/E325'，保持关系式α1＜α2和α1＜α3，并且还保持关系式E225’＞E280’和E325’＞E380’。
摘要（英）：

Provided is a pneumatic tire including, on an outer surface of its sidewall portion, a decorative portion including a print layer and inner and outer layers respectively disposed on tire inner and outer sides of the print layer. When storage moduli at 25 °C of the print, inner, and outer layers are respectively defined as E1 25 ', E2 25 ', and E3 25 ', E1 25 ' < E2 25 ' and E1 25 ' < E3 25 ' are satisfied. When storage moduli at 80 °C of the print, inner, and outer layers are respectively defined as E1 80 ', E2 80 ', and E3 80 ', and storage modulus variations ±1, ±2, and ±3 at high temperature of the print, inner, and outer layers are respectively defined as ±1 = |E1 25 ' - E1 80 '| / E1 25 ', ±2 = E2 25 ' - E2 80 ' | / E2 25 ', and ±3 = |E3 25 ' - E3 80 '| / E3 25 ', ±1 < ±2 and ±1 < ±3, and E2 25 ' > E2 80 ' and E3 25 ' > E3 80 ' are satisfied.

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