公开(公告)号：US20110094639A1

公开(公告)日：2011-04-28

申请号：US12907544

申请日：2010-10-19

Applicant: Yasujirou Daisho

Inventor： Yasujirou Daisho

IPC: B60C11/00

CPC classification number: B60C11/00 ,  B60C11/005 ,  B60C11/0066 ,  B60C11/0302 ,  B60C11/033 ,  B60C15/0045 ,  B60C2011/0025 ,  B60C2011/0033 ,  Y10T152/10837 ,  Y10T152/10846

Abstract: A pneumatic tire includes at least two types of cap tread rubber layers made from differing rubber compositions disposed in a tread portion. A tan δ at 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle outer side is greater than a tan δ at 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle inner side. A ratio (tan δH/tan δL) of a maximum tan δH to a minimum tan δL at 60° C. of the tan δ of the rubber compositions forming the at least two types of cap tread rubber layers is from 1.05 to 1.80. An under tread rubber layer disposed in the tread portion has an average thickness from 0.8 mm to 4.0 mm. A hardness of a rubber composition forming the under tread rubber layer is from 73 to 83. A tan δ at 60° C. of the rubber composition forming the under tread rubber layer is 0.25 or less.

Abstract translation: 充气轮胎包括由不同的橡胶组合物制成的胎面部分中至少两种类型的胎面橡胶层。 在车辆外侧，形成胎面橡胶层的橡胶组合物在60℃下的tanδ大于在车辆内侧形成胎冠橡胶层的橡胶组合物的60℃下的tanδ。 形成至少两种类型的胎面橡胶层的橡胶组合物的tanδ的最大tanδH与60℃下的最小tanδL的比（tanδH/tanδL）为1.05〜1.80。 设置在胎面部中的胎面下橡胶层的平均厚度为0.8mm〜4.0mm。 形成胎面下橡胶层的橡胶组合物的硬度为73〜83。形成胎面下橡胶层的橡胶组合物的60℃下的tanδ为0.25以下。

公开(公告)号：US08256478B2

公开(公告)日：2012-09-04

申请号：US12907544

申请日：2010-10-19

Applicant: Yasujirou Daisho

Inventor： Yasujirou Daisho

IPC: B60C9/08 ,  B60C11/03 ,  B60C11/18 ,  B60C15/06

CPC classification number: B60C11/00 ,  B60C11/005 ,  B60C11/0066 ,  B60C11/0302 ,  B60C11/033 ,  B60C15/0045 ,  B60C2011/0025 ,  B60C2011/0033 ,  Y10T152/10837 ,  Y10T152/10846

Abstract: A pneumatic tire includes at least two types of cap tread rubber layers made from differing rubber compositions disposed in a tread portion. A tan δ at 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle outer side is greater than a tan δ at 60° C. of a rubber composition forming the cap tread rubber layer on a vehicle inner side. A ratio (tan δH/tan δL) of a maximum tan δH to a minimum tan δL at 60° C. of the tan δ of the rubber compositions forming the at least two types of cap tread rubber layers is from 1.05 to 1.80 . An under tread rubber layer disposed in the tread portion has an average thickness from 0.8 mm to 4.0 mm. A hardness of a rubber composition forming the under tread rubber layer is from 73 to 83. A tan δ at 60° C. of the rubber composition forming the under tread rubber layer is 0.25 or less.

Abstract translation: 充气轮胎包括由不同的橡胶组合物制成的胎面部分中至少两种类型的胎面橡胶层。 在车辆外侧，形成胎面橡胶层的橡胶组合物在60℃下的tanδ大于在车辆内侧形成胎冠橡胶层的橡胶组合物的60℃下的tanδ。 形成至少两种类型的胎面橡胶层的橡胶组合物的tanδ的最大tanδH与60℃下的最小tanδL的比（tanδH/tanδL）为1.05〜1.80。 设置在胎面部中的胎面下橡胶层的平均厚度为0.8mm〜4.0mm。 形成胎面下橡胶层的橡胶组合物的硬度为73〜83。形成胎面下橡胶层的橡胶组合物的60℃下的tanδ为0.25以下。