公开(公告)号：EP3159184A1

公开(公告)日：2017-04-26

申请号：EP16193482.3

申请日：2016-10-12

Applicant: SUMITOMO RUBBER INDUSTRIES LIMITED

Inventor： IWAMURA, Wako ,  SUGIYA, Makoto

IPC: B60C9/18 ,  B60C7/18

CPC classification number: B60C7/24 ,  B60B27/06 ,  B60C7/10 ,  B60C7/18 ,  B60C9/18 ,  B60C11/0041 ,  B60C2007/005 ,  B60C2009/1871 ,  Y02T10/862

Abstract: [Problem to be solved] To provide an airless tire that has a small rolling resistance.
[Solution] An airless tire 1 is provided that includes a cylindrical tread ring 2 that has a ground contact surface (2a). The tread ring 2 has therein a reinforcing body 6. The reinforcing body 6 includes an annular first reinforcing cord layer 7 that extends in a tire circumferential direction, an annular second reinforcing cord layer 8 that is arranged on a tire radial direction inner side of the first reinforcing cord layer 7 and extends in the tire circumferential direction, and a shear layer 9 that is formed of an elastomer and is arranged between the first reinforcing cord layer 7 and the second reinforcing cord layer 8. The shear layer 9 includes a first portion 10 and a second portion 11, a loss tangent (tanδ) and a shear modulus (Ee) (unit: MPa) of the first portion 10 at a temperature of 30 °C satisfying the following Equations (1) and (2), and the second portion 11 being formed of a material different from the first portion 10. tanδ ≦ 0.06 Ee / tanδ ≧ 1500

Abstract translation: [要解决的问题]提供一种滚动阻力小的无气轮胎。 解决方案提供了一种无空气轮胎1，其包括具有接地表面（2a）的圆柱形胎面环2。 在胎面环2的内部具有加强体6.加强体6具有沿轮胎周向延伸的环状的第1加强帘线层7，配置在轮胎径向内侧的环状的第2加强帘线层8 第一加强帘线层7，并沿轮胎周向延伸;以及剪切层9，其由弹性体形成并布置在第一加强帘线层7和第二加强帘线层8之间。剪切层9包括第一部分 10和第二部分11，第一部分10在30℃的温度下的损耗角正切（tanδ）和剪切模量（Ee）（单位：MPa）满足以下等式（1）和（2），以及 第二部分11由与第一部分10不同的材料形成。tanδ≤0.06Ee/tanδ≥1500