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Title:
RUN FLAT TIRE
Document Type and Number:
Japanese Patent JP2009120024
Kind Code:
A
Abstract:

To improve durability without causing substantial mass increase.

The run flat tire 1 is equipped with a carcass 6, a tread reinforcing cord layer 7 and a cross sectionally crescent shaped side reinforcing rubber layer 11. The side reinforcing rubber layer 11 includes a rubber composition containing 5-120 pts.mass of nonmetal short fiber with a mean fiber diameter of 1-100 m and a mean fiber length of 0.1-20 mm, and the nonmetal short fiber is arranged in a tire circumference direction. The carcass 6 includes a carcass ply 6A wherein carcass codes arranged at an angle of 45-90 degrees with respect to a tire equator are covered on pink rubber. It is characterized by that aramid fiber wherein a twist coefficient T is 0.5-0.7 is used in the carcass cord.


Inventors:
Kikuchi, Naohiko
Imoto, Yoji
Application Number:
JP2007000295957
Publication Date:
June 04, 2009
Filing Date:
November 14, 2007
Export Citation:
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Assignee:
SUMITOMO RUBBER IND LTD
International Classes:
B60C17/00; B60C1/00; B60C9/00; B60C9/04; B60C9/08
Domestic Patent References:
JP2007161071A2007-06-28
JP2006192927A2006-07-27
JPH0732828A1995-02-03
JP2007276569A2007-10-25
JP2006199190A2006-08-03
JP2007284490A2007-11-01
JP2007284022A2007-11-01
Foreign References:
WO2007119521A12007-10-25
Attorney, Agent or Firm:
住友 慎太郎