公开(公告)号：US20150144243A1

公开(公告)日：2015-05-28

申请号：US14549009

申请日：2014-11-20

申请人： BRIDGESTONE CORPORATION

发明人： Yasuyo SAITO

IPC分类号： B60C15/06 ,  B60C1/00

CPC分类号： B60C15/0635 ,  B60C2001/005 ,  B60C2009/1864 ,  B60C2015/0682

摘要： A pneumatic tire, which may include a bead portion reinforcing cord layer disposed along a turn-up portion of a carcass, includes at least one component member selected from the group consisting of a carcass cord ply and a belt cord layer and/or the bead portion reinforcing cord layer including an end rubber wrapping the end part thereof, the end rubber having a loss tangent larger than 0.20 and 0.35 or smaller at 2% strain at 25° C. and a difference ΔE′ between a storage modulus at 0.1% strain and a storage modulus at 2% strain at 25° C. being 10 MPa or more and 30 MPa or less, and a coating rubber covering a cord in the component member and/or the bead portion reinforcing cord layer including the end rubber has a loss tangent at 2% strain at 25° C. of 0.20 or less.

摘要翻译： 一种充气轮胎，其可以包括沿着胎体的折叠部分设置的胎圈部分增强帘线层，包括至少一个选自由胎体帘布层帘布层和带束层层组成的组件和/或胎圈 部分加强帘线层包括包封其端部的端部橡胶，端部橡胶在25℃下的2％应变下的损耗角正切大于0.20且为0.35或更小，并且在20℃的储能模量之间存在差异Dgr; E' ％应变和在25℃下2％应变下的储能模量为10MPa以上且30MPa以下，涂布橡胶覆盖构成部件和/或胎圈部加强帘线层中的帘线，所述帘线橡胶包括端橡胶 在25℃的2％应变下的损耗角正切为0.20以下。